/* ============================================================
   HealthFlow — Component Library (components.css)
   All classes use hf- prefix.
   Supports light and dark themes via CSS custom properties.
   ============================================================ */

/* ============================================================
   KEYFRAME ANIMATIONS
   ============================================================ */

@keyframes hf-slide-in-right {
  from { transform: translateX(110%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

@keyframes hf-slide-out-right {
  from { transform: translateX(0);    opacity: 1; }
  to   { transform: translateX(110%); opacity: 0; }
}

@keyframes hf-slide-up {
  from { transform: translateY(24px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

@keyframes hf-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes hf-fade-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}

@keyframes hf-scale-in {
  from { transform: scale(0.92); opacity: 0; }
  to   { transform: scale(1);    opacity: 1; }
}

@keyframes hf-ripple {
  0%   { transform: scale(0);    opacity: 0.5; }
  100% { transform: scale(4);    opacity: 0;   }
}

@keyframes hf-spin {
  to { transform: rotate(360deg); }
}

@keyframes hf-pulse-ring {
  0%   { transform: scale(1);    opacity: 0.7; }
  70%  { transform: scale(1.4);  opacity: 0;   }
  100% { transform: scale(1.4);  opacity: 0;   }
}

@keyframes hf-progress-stripe {
  0%   { background-position: 0 0; }
  100% { background-position: 2.5rem 0; }
}

@keyframes hf-bounce-in {
  0%   { transform: scale(0.6);  opacity: 0; }
  60%  { transform: scale(1.08); opacity: 1; }
  80%  { transform: scale(0.96); }
  100% { transform: scale(1); }
}

@keyframes hf-shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}

@keyframes hf-streak-glow {
  0%, 100% { box-shadow: 0 0 6px 2px rgba(245, 158, 11, 0.40); }
  50%       { box-shadow: 0 0 14px 4px rgba(245, 158, 11, 0.70); }
}

/* ============================================================
   1. CARDS  (.hf-card)
   ============================================================ */

.hf-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--hf-glass-bg);
  backdrop-filter: var(--hf-glass-backdrop-blur) var(--hf-glass-saturate);
  -webkit-backdrop-filter: var(--hf-glass-backdrop-blur) var(--hf-glass-saturate);
  border: 1px solid var(--hf-glass-border);
  border-radius: var(--hf-radius-card);
  box-shadow: var(--hf-shadow-glass);
  padding: var(--hf-space-card);
  color: var(--hf-text-primary);
  overflow: hidden;
  transition: var(--hf-transition-base);
}

.hf-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.10) 0%,
    rgba(255, 255, 255, 0.00) 60%
  );
  pointer-events: none;
  z-index: 0;
}

.hf-card > * {
  position: relative;
  z-index: 1;
}

.hf-card:hover {
  background: var(--hf-glass-bg-strong);
  border-color: var(--hf-card-border-hover);
  box-shadow: var(--hf-shadow-card-hover);
  transform: translateY(-2px);
}

/* Flat variant */
.hf-card--flat {
  background: var(--hf-card-bg);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow: var(--hf-shadow-card);
  border-color: var(--hf-card-border);
}

.hf-card--flat:hover {
  background: var(--hf-card-bg-hover);
  box-shadow: var(--hf-shadow-card-hover);
}

/* Bordered variant */
.hf-card--bordered {
  background: var(--hf-bg-surface);
  box-shadow: none;
  border-color: var(--hf-border-default);
}

/* Elevated variant */
.hf-card--elevated {
  box-shadow: var(--hf-shadow-xl);
}

/* Compact variant */
.hf-card--compact {
  padding: var(--hf-space-card-sm);
}

/* Clickable / interactive */
.hf-card--clickable {
  cursor: pointer;
}

.hf-card--clickable:active {
  transform: translateY(0) scale(0.99);
  box-shadow: var(--hf-shadow-sm);
}

/* Card subparts */
.hf-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--hf-space-3);
  padding-bottom: var(--hf-space-4);
  border-bottom: 1px solid var(--hf-border-default);
  margin-bottom: var(--hf-space-4);
}

.hf-card-header--no-border {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.hf-card-title {
  font-size: var(--hf-text-lg);
  font-weight: var(--hf-font-semibold);
  color: var(--hf-text-primary);
  line-height: var(--hf-leading-tight);
  margin: 0;
}

.hf-card-subtitle {
  font-size: var(--hf-text-sm);
  color: var(--hf-text-tertiary);
  margin: var(--hf-space-0-5) 0 0;
}

.hf-card-body {
  flex: 1;
}

.hf-card-footer {
  display: flex;
  align-items: center;
  gap: var(--hf-space-3);
  padding-top: var(--hf-space-4);
  border-top: 1px solid var(--hf-border-default);
  margin-top: var(--hf-space-4);
}

.hf-card-footer--no-border {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

/* Color accent bar */
.hf-card--primary { border-top: 3px solid var(--hf-color-primary); }
.hf-card--success { border-top: 3px solid var(--hf-color-success); }
.hf-card--warning { border-top: 3px solid var(--hf-color-warning); }
.hf-card--danger  { border-top: 3px solid var(--hf-color-danger);  }
.hf-card--accent  { border-top: 3px solid var(--hf-color-accent);  }

/* ============================================================
   2. BUTTONS  (.hf-btn)
   ============================================================ */

.hf-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--hf-space-2);
  padding: var(--hf-space-btn);
  font-family: var(--hf-font-sans);
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-medium);
  line-height: var(--hf-leading-none);
  border-radius: var(--hf-radius-btn);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  overflow: hidden;
  vertical-align: middle;
  transition:
    background-color var(--hf-duration-normal) var(--hf-ease-in-out),
    border-color     var(--hf-duration-normal) var(--hf-ease-in-out),
    color            var(--hf-duration-normal) var(--hf-ease-in-out),
    box-shadow       var(--hf-duration-normal) var(--hf-ease-in-out),
    transform        var(--hf-duration-fast)   var(--hf-ease-spring);
}

.hf-btn:focus-visible {
  outline: none;
  box-shadow: var(--hf-focus-ring);
}

.hf-btn:active:not(:disabled) {
  transform: translateY(1px) scale(0.98);
}

.hf-btn:disabled,
.hf-btn[aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* Ripple effect */
.hf-btn__ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  transform: scale(0);
  animation: hf-ripple 600ms linear forwards;
  pointer-events: none;
}

/* -- Primary -- */
.hf-btn--primary {
  background: var(--hf-color-primary);
  border-color: var(--hf-color-primary);
  color: var(--hf-text-on-primary);
  box-shadow: var(--hf-shadow-primary);
}

.hf-btn--primary:hover:not(:disabled) {
  background: var(--hf-color-primary-hover);
  border-color: var(--hf-color-primary-hover);
  box-shadow: 0 6px 18px 0 rgba(59, 130, 246, 0.45);
}

.hf-btn--primary:active:not(:disabled) {
  background: var(--hf-color-primary-active);
  border-color: var(--hf-color-primary-active);
}

/* -- Secondary -- */
.hf-btn--secondary {
  background: var(--hf-bg-subtle);
  border-color: var(--hf-border-default);
  color: var(--hf-text-primary);
  box-shadow: var(--hf-shadow-sm);
}

.hf-btn--secondary:hover:not(:disabled) {
  background: var(--hf-bg-muted);
  border-color: var(--hf-border-strong);
  box-shadow: var(--hf-shadow-md);
}

.hf-btn--secondary:active:not(:disabled) {
  background: var(--hf-bg-muted);
  border-color: var(--hf-border-strong);
  box-shadow: var(--hf-shadow-xs);
}

/* -- Ghost -- */
.hf-btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--hf-text-secondary);
  box-shadow: none;
}

.hf-btn--ghost:hover:not(:disabled) {
  background: var(--hf-bg-subtle);
  color: var(--hf-text-primary);
}

.hf-btn--ghost:active:not(:disabled) {
  background: var(--hf-bg-muted);
}

/* -- Danger -- */
.hf-btn--danger {
  background: var(--hf-color-danger);
  border-color: var(--hf-color-danger);
  color: var(--hf-text-on-danger);
  box-shadow: var(--hf-shadow-danger);
}

.hf-btn--danger:hover:not(:disabled) {
  background: var(--hf-color-danger-hover);
  border-color: var(--hf-color-danger-hover);
  box-shadow: 0 6px 18px 0 rgba(239, 68, 68, 0.45);
}

.hf-btn--danger:active:not(:disabled) {
  background: var(--hf-color-danger-active);
  border-color: var(--hf-color-danger-active);
}

/* -- Danger Ghost -- */
.hf-btn--danger-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--hf-color-danger);
  box-shadow: none;
}

.hf-btn--danger-ghost:hover:not(:disabled) {
  background: var(--hf-color-danger-muted);
  color: var(--hf-color-danger-hover);
}

/* -- Accent -- */
.hf-btn--accent {
  background: var(--hf-color-accent);
  border-color: var(--hf-color-accent);
  color: var(--hf-text-on-accent);
  box-shadow: var(--hf-shadow-accent);
}

.hf-btn--accent:hover:not(:disabled) {
  background: var(--hf-color-accent-hover);
  border-color: var(--hf-color-accent-hover);
  box-shadow: 0 6px 18px 0 rgba(139, 92, 246, 0.45);
}

/* -- Outlined -- */
.hf-btn--outlined {
  background: transparent;
  border-color: var(--hf-color-primary);
  color: var(--hf-color-primary);
  box-shadow: none;
}

.hf-btn--outlined:hover:not(:disabled) {
  background: var(--hf-color-primary-muted);
}

/* -- Sizes -- */
.hf-btn--sm {
  padding: var(--hf-space-btn-sm);
  font-size: var(--hf-text-xs);
  border-radius: var(--hf-radius-md);
}

.hf-btn--lg {
  padding: var(--hf-space-btn-lg);
  font-size: var(--hf-text-base);
  border-radius: var(--hf-radius-xl);
}

.hf-btn--icon {
  padding: var(--hf-space-2-5);
  aspect-ratio: 1;
  border-radius: var(--hf-radius-btn);
}

.hf-btn--icon.hf-btn--sm {
  padding: var(--hf-space-1-5);
}

.hf-btn--icon.hf-btn--lg {
  padding: var(--hf-space-3-5);
}

.hf-btn--full {
  width: 100%;
}

/* -- Loading state -- */
.hf-btn--loading {
  pointer-events: none;
  opacity: 0.75;
}

.hf-btn__spinner {
  display: inline-block;
  width: 1em;
  height: 1em;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: hf-spin 700ms linear infinite;
  flex-shrink: 0;
}

.hf-btn__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1em;
  height: 1em;
  flex-shrink: 0;
}

/* ============================================================
   3. PROGRESS RING  (.hf-progress-ring)
   ============================================================ */

.hf-progress-ring {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hf-progress-ring__svg {
  transform: rotate(-90deg);
  display: block;
}

.hf-progress-ring__track {
  fill: none;
  stroke: var(--hf-border-default);
  transition: stroke var(--hf-duration-normal) var(--hf-ease-in-out);
}

.hf-progress-ring__fill {
  fill: none;
  stroke: var(--hf-color-primary);
  stroke-linecap: round;
  transition:
    stroke-dashoffset var(--hf-duration-slow) var(--hf-ease-out),
    stroke            var(--hf-duration-normal) var(--hf-ease-in-out);
}

.hf-progress-ring__fill--success { stroke: var(--hf-color-success); }
.hf-progress-ring__fill--warning { stroke: var(--hf-color-warning); }
.hf-progress-ring__fill--danger  { stroke: var(--hf-color-danger);  }
.hf-progress-ring__fill--accent  { stroke: var(--hf-color-accent);  }

.hf-progress-ring__fill--gradient {
  stroke: url(#hf-ring-gradient);
}

.hf-progress-ring__label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  line-height: var(--hf-leading-tight);
  pointer-events: none;
}

.hf-progress-ring__value {
  display: block;
  font-size: var(--hf-text-xl);
  font-weight: var(--hf-font-bold);
  color: var(--hf-text-primary);
  letter-spacing: var(--hf-tracking-tight);
}

.hf-progress-ring__sub {
  display: block;
  font-size: var(--hf-text-xs);
  color: var(--hf-text-tertiary);
}

/* Sizes */
.hf-progress-ring--sm  { width: 56px;  height: 56px;  }
.hf-progress-ring--sm  .hf-progress-ring__value { font-size: var(--hf-text-sm); }
.hf-progress-ring--md  { width: 80px;  height: 80px;  }
.hf-progress-ring--lg  { width: 120px; height: 120px; }
.hf-progress-ring--lg  .hf-progress-ring__value { font-size: var(--hf-text-2xl); }
.hf-progress-ring--xl  { width: 160px; height: 160px; }
.hf-progress-ring--xl  .hf-progress-ring__value { font-size: var(--hf-text-3xl); }

/* ============================================================
   4. PROGRESS BAR  (.hf-progress-bar)
   ============================================================ */

.hf-progress-bar {
  width: 100%;
  position: relative;
}

.hf-progress-bar__label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--hf-space-1-5);
}

.hf-progress-bar__label {
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-medium);
  color: var(--hf-text-secondary);
}

.hf-progress-bar__value {
  font-size: var(--hf-text-xs);
  font-weight: var(--hf-font-semibold);
  color: var(--hf-text-primary);
}

.hf-progress-bar__track {
  width: 100%;
  height: 8px;
  background: var(--hf-bg-muted);
  border-radius: var(--hf-radius-full);
  overflow: hidden;
  position: relative;
}

.hf-progress-bar--sm .hf-progress-bar__track { height: 4px; }
.hf-progress-bar--lg .hf-progress-bar__track { height: 12px; }
.hf-progress-bar--xl .hf-progress-bar__track { height: 16px; }

.hf-progress-bar__fill {
  height: 100%;
  border-radius: var(--hf-radius-full);
  background: linear-gradient(
    90deg,
    var(--hf-color-primary) 0%,
    var(--hf-color-accent)  100%
  );
  transition: width var(--hf-duration-slow) var(--hf-ease-out);
  position: relative;
}

.hf-progress-bar__fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.30) 50%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: hf-shimmer 1.8s ease-in-out infinite;
}

/* Color variants */
.hf-progress-bar--success .hf-progress-bar__fill {
  background: linear-gradient(90deg, var(--hf-color-success) 0%, #34d399 100%);
}

.hf-progress-bar--warning .hf-progress-bar__fill {
  background: linear-gradient(90deg, var(--hf-color-warning) 0%, #fbbf24 100%);
}

.hf-progress-bar--danger .hf-progress-bar__fill {
  background: linear-gradient(90deg, var(--hf-color-danger) 0%, #f87171 100%);
}

.hf-progress-bar--accent .hf-progress-bar__fill {
  background: linear-gradient(90deg, var(--hf-color-accent) 0%, #a78bfa 100%);
}

/* Striped animated variant */
.hf-progress-bar--striped .hf-progress-bar__fill {
  background-image: repeating-linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.15) 0,
    rgba(255, 255, 255, 0.15) 0.625rem,
    transparent 0.625rem,
    transparent 1.25rem
  );
  background-size: 2.5rem 100%;
  animation: hf-progress-stripe 600ms linear infinite;
}

/* ============================================================
   5. TOAST NOTIFICATIONS  (.hf-toast)
   ============================================================ */

.hf-toast-container {
  position: fixed;
  top: var(--hf-space-5);
  right: var(--hf-space-5);
  z-index: var(--hf-z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--hf-space-3);
  pointer-events: none;
  max-width: 380px;
  width: calc(100vw - 2 * var(--hf-space-5));
}

.hf-toast {
  display: flex;
  align-items: flex-start;
  gap: var(--hf-space-3);
  padding: var(--hf-space-4);
  background: var(--hf-bg-surface);
  border: 1px solid var(--hf-border-default);
  border-radius: var(--hf-radius-xl);
  box-shadow: var(--hf-shadow-lg);
  pointer-events: all;
  animation: hf-slide-in-right var(--hf-duration-moderate) var(--hf-ease-spring) both;
  position: relative;
  overflow: hidden;
}

.hf-toast--exiting {
  animation: hf-slide-out-right var(--hf-duration-moderate) var(--hf-ease-in) both;
}

/* Color bar */
.hf-toast::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  border-radius: var(--hf-radius-xl) 0 0 var(--hf-radius-xl);
}

.hf-toast--success::before { background: var(--hf-color-success); }
.hf-toast--error::before   { background: var(--hf-color-danger);  }
.hf-toast--warning::before { background: var(--hf-color-warning); }
.hf-toast--info::before    { background: var(--hf-color-primary); }

.hf-toast__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 1px;
}

.hf-toast--success .hf-toast__icon { color: var(--hf-color-success); }
.hf-toast--error   .hf-toast__icon { color: var(--hf-color-danger);  }
.hf-toast--warning .hf-toast__icon { color: var(--hf-color-warning); }
.hf-toast--info    .hf-toast__icon { color: var(--hf-color-primary); }

.hf-toast__content {
  flex: 1;
  min-width: 0;
}

.hf-toast__title {
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-semibold);
  color: var(--hf-text-primary);
  line-height: var(--hf-leading-snug);
  margin: 0 0 var(--hf-space-0-5);
}

.hf-toast__message {
  font-size: var(--hf-text-sm);
  color: var(--hf-text-secondary);
  line-height: var(--hf-leading-normal);
  margin: 0;
}

.hf-toast__close {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: none;
  border: none;
  border-radius: var(--hf-radius-md);
  color: var(--hf-text-tertiary);
  cursor: pointer;
  padding: 0;
  transition: var(--hf-transition-base);
}

.hf-toast__close:hover {
  background: var(--hf-bg-subtle);
  color: var(--hf-text-primary);
}

/* Progress bar on toast */
.hf-toast__progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background: currentColor;
  opacity: 0.25;
  border-radius: 0 0 var(--hf-radius-xl) var(--hf-radius-xl);
  transition: width linear;
}

/* ============================================================
   6. MODALS  (.hf-modal)
   ============================================================ */

.hf-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--hf-z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--hf-space-4);
  background: var(--hf-overlay-bg);
  backdrop-filter: var(--hf-overlay-blur);
  -webkit-backdrop-filter: var(--hf-overlay-blur);
  animation: hf-fade-in var(--hf-duration-normal) var(--hf-ease-out) both;
}

.hf-modal-backdrop--exiting {
  animation: hf-fade-out var(--hf-duration-normal) var(--hf-ease-in) both;
}

.hf-modal {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 30%;
  max-height: calc(100vh - var(--hf-space-8));
  background: var(--hf-bg-surface);
  border: 1px solid var(--hf-border-default);
  border-radius: var(--hf-radius-modal);
  box-shadow: var(--hf-shadow-modal);
  animation: hf-slide-up var(--hf-duration-moderate) var(--hf-ease-spring) both;
  overflow: hidden;
}

.hf-modal-backdrop--exiting .hf-modal {
  animation: hf-fade-out var(--hf-duration-normal) var(--hf-ease-in) both;
}

/* Sizes */
.hf-modal--sm { max-width: 400px;  }
.hf-modal--md { max-width: 560px;  }
.hf-modal--lg { max-width: 760px;  }
.hf-modal--xl { max-width: 1020px; }

.hf-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--hf-space-4);
  padding: var(--hf-space-5) var(--hf-space-6);
  border-bottom: 1px solid var(--hf-border-default);
  flex-shrink: 0;
}

.hf-modal__title {
  font-size: var(--hf-text-lg);
  font-weight: var(--hf-font-semibold);
  color: var(--hf-text-primary);
  margin: 0;
  line-height: var(--hf-leading-tight);
}

.hf-modal__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  border-radius: var(--hf-radius-md);
  color: var(--hf-text-tertiary);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: var(--hf-transition-base);
}

.hf-modal__close:hover {
  background: var(--hf-bg-subtle);
  color: var(--hf-text-primary);
}

.hf-modal__close:focus-visible {
  outline: none;
  box-shadow: var(--hf-focus-ring);
}

.hf-modal__body {
  flex: 1;
  overflow-y: auto;
  padding: var(--hf-space-6);
  overscroll-behavior: contain;
}

.hf-modal__footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--hf-space-3);
  padding: var(--hf-space-4) var(--hf-space-6);
  border-top: 1px solid var(--hf-border-default);
  flex-shrink: 0;
}

.hf-modal__footer--start {
  justify-content: flex-start;
}

.hf-modal__footer--between {
  justify-content: space-between;
}

/* ============================================================
   7. BADGES  (.hf-badge)
   ============================================================ */

.hf-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--hf-space-1);
  padding: 0.2em 0.65em;
  font-size: var(--hf-text-xs);
  font-weight: var(--hf-font-semibold);
  line-height: var(--hf-leading-none);
  border-radius: var(--hf-radius-badge);
  white-space: nowrap;
  letter-spacing: var(--hf-tracking-wide);
  border: 1px solid transparent;
  transition: var(--hf-transition-base);
}

/* Status badges */
.hf-badge--primary {
  background: var(--hf-color-primary-muted);
  color: var(--hf-color-primary-700);
  border-color: rgba(59, 130, 246, 0.25);
}

.hf-badge--success {
  background: var(--hf-color-success-muted);
  color: var(--hf-color-success-700);
  border-color: rgba(16, 185, 129, 0.25);
}

.hf-badge--warning {
  background: var(--hf-color-warning-muted);
  color: var(--hf-color-warning-700);
  border-color: rgba(245, 158, 11, 0.25);
}

.hf-badge--danger {
  background: var(--hf-color-danger-muted);
  color: var(--hf-color-danger-700);
  border-color: rgba(239, 68, 68, 0.25);
}

.hf-badge--accent {
  background: var(--hf-color-accent-muted);
  color: var(--hf-color-accent-700);
  border-color: rgba(139, 92, 246, 0.25);
}

.hf-badge--neutral {
  background: var(--hf-bg-subtle);
  color: var(--hf-text-secondary);
  border-color: var(--hf-border-default);
}

/* Solid variants */
.hf-badge--primary-solid { background: var(--hf-color-primary); color: #fff; }
.hf-badge--success-solid { background: var(--hf-color-success); color: #fff; }
.hf-badge--warning-solid { background: var(--hf-color-warning); color: #fff; }
.hf-badge--danger-solid  { background: var(--hf-color-danger);  color: #fff; }
.hf-badge--accent-solid  { background: var(--hf-color-accent);  color: #fff; }

/* Dark theme adjustments */
[data-theme="dark"] .hf-badge--primary { color: var(--hf-color-primary-300); }
[data-theme="dark"] .hf-badge--success { color: var(--hf-color-success-300); }
[data-theme="dark"] .hf-badge--warning { color: var(--hf-color-warning-300); }
[data-theme="dark"] .hf-badge--danger  { color: var(--hf-color-danger-300);  }
[data-theme="dark"] .hf-badge--accent  { color: var(--hf-color-accent-300);  }

/* Achievement badges */
.hf-badge--achievement {
  padding: 0.35em 0.85em;
  font-size: var(--hf-text-xs);
  border-radius: var(--hf-radius-badge);
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.40);
  text-transform: uppercase;
  letter-spacing: var(--hf-tracking-wider);
}

.hf-badge--achievement-silver {
  background: linear-gradient(135deg, #e2e8f0 0%, #94a3b8 100%);
  color: var(--hf-color-neutral-700);
  box-shadow: 0 2px 8px rgba(148, 163, 184, 0.40);
}

.hf-badge--achievement-bronze {
  background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(180, 83, 9, 0.40);
}

/* Streak badge */
.hf-badge--streak {
  background: linear-gradient(135deg, #f97316 0%, #ef4444 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(249, 115, 22, 0.40);
  animation: hf-streak-glow 2s ease-in-out infinite;
}

/* Dot badge (status indicator) */
.hf-badge--dot {
  display: inline-flex;
  align-items: center;
  gap: var(--hf-space-1-5);
  padding: 0.25em 0.6em;
}

.hf-badge--dot::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

/* Number badge (pill counter) */
.hf-badge--count {
  min-width: 1.375rem;
  height: 1.375rem;
  padding: 0 0.4em;
  font-size: 0.7rem;
}

/* ============================================================
   8. INPUTS  (.hf-input, .hf-select, .hf-textarea)
   ============================================================ */

.hf-field {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--hf-space-1-5);
}

.hf-label {
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-medium);
  color: var(--hf-text-secondary);
  line-height: var(--hf-leading-snug);
  transition: color var(--hf-duration-normal) var(--hf-ease-in-out);
}

.hf-label--required::after {
  content: ' *';
  color: var(--hf-color-danger);
}

.hf-input,
.hf-select,
.hf-textarea {
  width: 100%;
  padding: var(--hf-space-input);
  font-family: var(--hf-font-sans);
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-normal);
  color: var(--hf-input-text);
  background: var(--hf-input-bg);
  border: 1px solid var(--hf-input-border);
  border-radius: var(--hf-radius-input);
  outline: none;
  transition:
    border-color var(--hf-duration-normal) var(--hf-ease-in-out),
    box-shadow   var(--hf-duration-normal) var(--hf-ease-in-out),
    background   var(--hf-duration-normal) var(--hf-ease-in-out);
  appearance: none;
  -webkit-appearance: none;
}

.hf-input::placeholder,
.hf-textarea::placeholder {
  color: var(--hf-input-placeholder);
}

.hf-input:hover:not(:disabled):not(:focus),
.hf-select:hover:not(:disabled):not(:focus),
.hf-textarea:hover:not(:disabled):not(:focus) {
  border-color: var(--hf-input-border-hover);
}

.hf-input:focus,
.hf-select:focus,
.hf-textarea:focus {
  border-color: var(--hf-input-border-focus);
  box-shadow: 0 0 0 3px var(--hf-focus-ring-color);
}

.hf-input:disabled,
.hf-select:disabled,
.hf-textarea:disabled {
  background: var(--hf-input-disabled-bg);
  color: var(--hf-input-disabled-text);
  cursor: not-allowed;
  opacity: 1;
}

/* Size variants */
.hf-input--sm,
.hf-select--sm {
  padding: var(--hf-space-btn-sm);
  font-size: var(--hf-text-xs);
  border-radius: var(--hf-radius-md);
}

.hf-input--lg,
.hf-select--lg {
  padding: var(--hf-space-3-5) var(--hf-space-5);
  font-size: var(--hf-text-base);
  border-radius: var(--hf-radius-xl);
}

/* Validation states */
.hf-input--error,
.hf-select--error,
.hf-textarea--error {
  border-color: var(--hf-color-danger);
}

.hf-input--error:focus,
.hf-select--error:focus,
.hf-textarea--error:focus {
  box-shadow: 0 0 0 3px var(--hf-color-danger-muted);
}

.hf-input--success,
.hf-select--success,
.hf-textarea--success {
  border-color: var(--hf-color-success);
}

.hf-input--success:focus,
.hf-select--success:focus,
.hf-textarea--success:focus {
  box-shadow: 0 0 0 3px var(--hf-color-success-muted);
}

/* Textarea */
.hf-textarea {
  min-height: 6rem;
  resize: vertical;
  line-height: var(--hf-leading-relaxed);
}

/* Select custom arrow */
.hf-select {
  padding-right: var(--hf-space-10);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%2364748b' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--hf-space-3) center;
  background-size: 16px;
  cursor: pointer;
}

/* Input with icon wrapper */
.hf-input-group {
  position: relative;
  display: flex;
  /* align-items: center; */
}

.hf-input-group .hf-input {
  padding-left: var(--hf-space-10);
}

.hf-input-group .hf-input-group__icon {
  position: absolute;
  left: var(--hf-space-3);
  width: 18px;
  height: 18px;
  color: var(--hf-text-tertiary);
  pointer-events: none;
  z-index: 1;
}

.hf-input-group--right .hf-input {
  padding-left: var(--hf-space-input);
  padding-right: var(--hf-space-10);
}

.hf-input-group--right .hf-input-group__icon {
  left: auto;
  right: var(--hf-space-3);
}

/* Floating label wrapper */
.hf-field--floating {
  position: relative;
}

.hf-field--floating .hf-input,
.hf-field--floating .hf-textarea {
  padding-top: var(--hf-space-6);
  padding-bottom: var(--hf-space-2);
}

.hf-field--floating .hf-label {
  position: absolute;
  top: 50%;
  left: var(--hf-space-4);
  transform: translateY(-50%);
  pointer-events: none;
  font-size: var(--hf-text-sm);
  color: var(--hf-input-placeholder);
  transition:
    top         var(--hf-duration-normal) var(--hf-ease-in-out),
    font-size   var(--hf-duration-normal) var(--hf-ease-in-out),
    color       var(--hf-duration-normal) var(--hf-ease-in-out),
    transform   var(--hf-duration-normal) var(--hf-ease-in-out);
}

.hf-field--floating .hf-input:focus ~ .hf-label,
.hf-field--floating .hf-input:not(:placeholder-shown) ~ .hf-label,
.hf-field--floating .hf-textarea:focus ~ .hf-label,
.hf-field--floating .hf-textarea:not(:placeholder-shown) ~ .hf-label {
  top: var(--hf-space-2);
  transform: translateY(0);
  font-size: var(--hf-text-xs);
  color: var(--hf-color-primary);
}

.hf-field__hint {
  font-size: var(--hf-text-xs);
  color: var(--hf-text-tertiary);
  margin-top: var(--hf-space-1);
}

.hf-field__error {
  font-size: var(--hf-text-xs);
  color: var(--hf-color-danger);
  margin-top: var(--hf-space-1);
  display: flex;
  align-items: center;
  gap: var(--hf-space-1);
}

/* ============================================================
   9. NAVIGATION TABS  (.hf-tabs)
   ============================================================ */

.hf-tabs {
  display: flex;
  flex-direction: column;
}

/* Tab List */
.hf-tabs__list {
  display: flex;
  align-items: center;
  gap: var(--hf-space-1);
  padding: 0;
  margin: 0;
  list-style: none;
}

/* Underline variant */
.hf-tabs--underline .hf-tabs__list {
  border-bottom: 2px solid var(--hf-border-default);
  gap: 0;
}

.hf-tabs--underline .hf-tabs__tab {
  position: relative;
  padding: var(--hf-space-2-5) var(--hf-space-4);
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-medium);
  color: var(--hf-text-tertiary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  border-radius: var(--hf-radius-md) var(--hf-radius-md) 0 0;
  transition:
    color        var(--hf-duration-normal) var(--hf-ease-in-out),
    border-color var(--hf-duration-normal) var(--hf-ease-in-out),
    background   var(--hf-duration-normal) var(--hf-ease-in-out);
  white-space: nowrap;
}

.hf-tabs--underline .hf-tabs__tab:hover:not([aria-selected="true"]) {
  color: var(--hf-text-primary);
  background: var(--hf-bg-subtle);
}

.hf-tabs--underline .hf-tabs__tab[aria-selected="true"] {
  color: var(--hf-color-primary);
  border-bottom-color: var(--hf-color-primary);
}

.hf-tabs--underline .hf-tabs__tab:focus-visible {
  outline: none;
  box-shadow: var(--hf-focus-ring);
}

/* Pill variant */
.hf-tabs--pill .hf-tabs__list {
  background: var(--hf-bg-subtle);
  border-radius: var(--hf-radius-xl);
  padding: var(--hf-space-1);
  gap: var(--hf-space-1);
}

.hf-tabs--pill .hf-tabs__tab {
  padding: var(--hf-space-2) var(--hf-space-4);
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-medium);
  color: var(--hf-text-secondary);
  background: none;
  border: none;
  border-radius: var(--hf-radius-lg);
  cursor: pointer;
  transition: var(--hf-transition-base);
  white-space: nowrap;
}

.hf-tabs--pill .hf-tabs__tab:hover:not([aria-selected="true"]) {
  color: var(--hf-text-primary);
  background: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .hf-tabs--pill .hf-tabs__tab:hover:not([aria-selected="true"]) {
  background: rgba(255, 255, 255, 0.07);
}

.hf-tabs--pill .hf-tabs__tab[aria-selected="true"] {
  background: var(--hf-bg-surface);
  color: var(--hf-color-primary);
  box-shadow: var(--hf-shadow-sm);
}

.hf-tabs--pill .hf-tabs__tab:focus-visible {
  outline: none;
  box-shadow: var(--hf-focus-ring);
}

/* Tab badge */
.hf-tabs__tab-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 0.3em;
  font-size: 0.65rem;
  font-weight: var(--hf-font-bold);
  border-radius: var(--hf-radius-full);
  background: var(--hf-color-primary-muted);
  color: var(--hf-color-primary);
  margin-left: var(--hf-space-1-5);
}

.hf-tabs__tab[aria-selected="true"] .hf-tabs__tab-badge {
  background: var(--hf-color-primary);
  color: #fff;
}

/* Tab panel */
.hf-tabs__panel {
  padding-top: var(--hf-space-5);
}

.hf-tabs__panel[hidden] {
  display: none;
}

/* ============================================================
   10. STAT CARD  (.hf-stat-card)
   ============================================================ */

.hf-stat-card {
  display: flex;
  flex-direction: column;
  gap: var(--hf-space-2);
  padding: var(--hf-space-5);
  background: var(--hf-glass-bg);
  backdrop-filter: var(--hf-glass-backdrop-blur) var(--hf-glass-saturate);
  -webkit-backdrop-filter: var(--hf-glass-backdrop-blur) var(--hf-glass-saturate);
  border: 1px solid var(--hf-glass-border);
  border-radius: var(--hf-radius-card);
  box-shadow: var(--hf-shadow-glass);
  transition: var(--hf-transition-base);
}

.hf-stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--hf-shadow-card-hover);
}

.hf-stat-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hf-stat-card__label {
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-medium);
  color: var(--hf-text-tertiary);
  text-transform: uppercase;
  letter-spacing: var(--hf-tracking-wider);
}

.hf-stat-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--hf-radius-lg);
  background: var(--hf-color-primary-muted);
  color: var(--hf-color-primary);
  flex-shrink: 0;
}

.hf-stat-card__value {
  font-size: var(--hf-text-3xl);
  font-weight: var(--hf-font-bold);
  color: var(--hf-text-primary);
  line-height: var(--hf-leading-none);
  letter-spacing: var(--hf-tracking-tight);
}

.hf-stat-card__trend {
  display: inline-flex;
  align-items: center;
  gap: var(--hf-space-1);
  font-size: var(--hf-text-xs);
  font-weight: var(--hf-font-semibold);
  border-radius: var(--hf-radius-full);
  padding: 0.2em 0.65em;
}

.hf-stat-card__trend--up {
  color: var(--hf-color-success-700);
  background: var(--hf-color-success-muted);
}

.hf-stat-card__trend--down {
  color: var(--hf-color-danger-700);
  background: var(--hf-color-danger-muted);
}

.hf-stat-card__trend--neutral {
  color: var(--hf-text-tertiary);
  background: var(--hf-bg-subtle);
}

[data-theme="dark"] .hf-stat-card__trend--up   { color: var(--hf-color-success-300); }
[data-theme="dark"] .hf-stat-card__trend--down  { color: var(--hf-color-danger-300);  }

.hf-stat-card__trend-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.hf-stat-card__sub {
  font-size: var(--hf-text-xs);
  color: var(--hf-text-tertiary);
}

.hf-stat-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--hf-space-2);
  margin-top: var(--hf-space-1);
}

/* ============================================================
   11. FLOATING ACTION BUTTON  (.hf-fab)
   ============================================================ */

.hf-fab {
  position: fixed;
  bottom: var(--hf-space-6);
  right: var(--hf-space-6);
  z-index: var(--hf-z-overlay);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--hf-radius-full);
  background: var(--hf-color-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: var(--hf-shadow-primary), var(--hf-shadow-lg);
  transition:
    background var(--hf-duration-normal) var(--hf-ease-in-out),
    transform   var(--hf-duration-fast)   var(--hf-ease-spring),
    box-shadow  var(--hf-duration-normal) var(--hf-ease-in-out);
  overflow: hidden;
}

.hf-fab:hover {
  background: var(--hf-color-primary-hover);
  transform: scale(1.08) translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.55), var(--hf-shadow-xl);
}

.hf-fab:active {
  transform: scale(0.96);
  box-shadow: var(--hf-shadow-md);
}

.hf-fab:focus-visible {
  outline: none;
  box-shadow: var(--hf-focus-ring), var(--hf-shadow-lg);
}

/* Pulse ring animation */
.hf-fab::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--hf-color-primary);
  animation: hf-pulse-ring 2.4s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  z-index: -1;
}

.hf-fab--no-pulse::before {
  display: none;
}

/* Size variants */
.hf-fab--sm {
  width: 40px;
  height: 40px;
}

.hf-fab--lg {
  width: 64px;
  height: 64px;
}

/* Colour variants */
.hf-fab--accent {
  background: var(--hf-color-accent);
  box-shadow: var(--hf-shadow-accent), var(--hf-shadow-lg);
}

.hf-fab--accent::before {
  background: var(--hf-color-accent);
}

.hf-fab--accent:hover {
  background: var(--hf-color-accent-hover);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.55), var(--hf-shadow-xl);
}

.hf-fab--success {
  background: var(--hf-color-success);
  box-shadow: var(--hf-shadow-success), var(--hf-shadow-lg);
}

.hf-fab--success::before {
  background: var(--hf-color-success);
}

/* Extended FAB (icon + label) */
.hf-fab--extended {
  width: auto;
  padding: 0 var(--hf-space-5);
  gap: var(--hf-space-2);
  border-radius: var(--hf-radius-full);
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-semibold);
  font-family: var(--hf-font-sans);
}

/* Position helpers */
.hf-fab--bottom-left {
  left: var(--hf-space-6);
  right: auto;
}

.hf-fab.active {
  background: var(--hf-color-danger, #ef4444);
}

.hf-fab.active:hover {
  background: var(--hf-color-danger-hover, #dc2626);
}

.hf-fab-icon-plus {
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.hf-fab.active .hf-fab-icon-plus {
  opacity: 0;
  transform: rotate(-90deg);
}

.hf-fab-icon-close {
  position: absolute;
  opacity: 0;
  transform: rotate(90deg);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.hf-fab.active .hf-fab-icon-close {
  opacity: 1;
  transform: rotate(0deg);
}

/* FAB Menu */
.hf-fab-menu {
  position: fixed;
  bottom: calc(var(--hf-space-6) + 60px);
  right: var(--hf-space-6);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: calc(var(--hf-z-overlay) - 1);
  opacity: 0;
  visibility: hidden;
  transform: scale(0.6) translateY(20px);
  transform-origin: bottom right;
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
  pointer-events: none;
}

.hf-fab-menu.active {
  opacity: 1;
  visibility: visible;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.hf-fab-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  border: none;
  background: var(--hf-bg-surface, #ffffff);
  color: var(--hf-color-text, #1e293b);
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.12);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.18s ease;
  animation: hf-fab-item-pop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes hf-fab-item-pop {
  from {
    opacity: 0;
    transform: scale(0.3) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.hf-fab-item:nth-child(1) { animation-delay: 0.02s; }
.hf-fab-item:nth-child(2) { animation-delay: 0.06s; }
.hf-fab-item:nth-child(3) { animation-delay: 0.10s; }
.hf-fab-item:nth-child(4) { animation-delay: 0.14s; }
.hf-fab-item:nth-child(5) { animation-delay: 0.18s; }
.hf-fab-item:nth-child(6) { animation-delay: 0.22s; }

.hf-fab-item:hover {
  background: var(--hf-color-surface, #f8fafc);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.20);
}

.hf-fab-item:active {
  transform: scale(0.95);
}

.hf-fab-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: #fff;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.hf-fab-item-icon--blue {
  background: var(--hf-color-primary, #3b82f6);
}

.hf-fab-item-icon--orange {
  background: #f97316;
}

.hf-fab-item-icon--purple {
  background: #8b5cf6;
}

.hf-fab-item-icon--green {
  background: #22c55e;
}

.hf-fab-item-icon--pink {
  background: #ec4899;
}

.hf-fab-item-icon--yellow {
  background: #eab308;
  color: #1e293b;
}

.hf-fab-item-label {
  white-space: nowrap;
  font-size: 0.95rem;
}

/* ============================================================
   12. COMMAND PALETTE  (.hf-command-palette)
   ============================================================ */

.hf-command-palette-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--hf-z-top);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: clamp(4rem, 10vh, 10rem);
  padding-inline: var(--hf-space-4);
  background: var(--hf-overlay-bg);
  backdrop-filter: var(--hf-overlay-blur);
  -webkit-backdrop-filter: var(--hf-overlay-blur);
  animation: hf-fade-in var(--hf-duration-fast) var(--hf-ease-out) both;
}

.hf-command-palette-backdrop--exiting {
  animation: hf-fade-out var(--hf-duration-fast) var(--hf-ease-in) both;
}

.hf-command-palette {
  width: 100%;
  max-width: 600px;
  background: var(--hf-bg-surface);
  border: 1px solid var(--hf-border-default);
  border-radius: var(--hf-radius-2xl);
  box-shadow: var(--hf-shadow-2xl);
  overflow: hidden;
  animation: hf-scale-in var(--hf-duration-moderate) var(--hf-ease-spring) both;
}

.hf-command-palette-backdrop--exiting .hf-command-palette {
  animation: hf-fade-out var(--hf-duration-fast) var(--hf-ease-in) both;
}

.hf-command-palette__search-wrap {
  display: flex;
  align-items: center;
  gap: var(--hf-space-3);
  padding: var(--hf-space-4) var(--hf-space-5);
  border-bottom: 1px solid var(--hf-border-default);
}

.hf-command-palette__search-icon {
  width: 18px;
  height: 18px;
  color: var(--hf-text-tertiary);
  flex-shrink: 0;
}

.hf-command-palette__input {
  flex: 1;
  font-size: var(--hf-text-base);
  font-family: var(--hf-font-sans);
  color: var(--hf-text-primary);
  background: none;
  border: none;
  outline: none;
  caret-color: var(--hf-color-primary);
}

.hf-command-palette__input::placeholder {
  color: var(--hf-input-placeholder);
}

.hf-command-palette__kbd {
  flex-shrink: 0;
  font-size: var(--hf-text-xs);
  color: var(--hf-text-quaternary);
  background: var(--hf-bg-subtle);
  border: 1px solid var(--hf-border-default);
  border-radius: var(--hf-radius-md);
  padding: 0.15em 0.5em;
  font-family: var(--hf-font-mono);
}

.hf-command-palette__results {
  max-height: 400px;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--hf-space-2) 0;
}

.hf-command-palette__section-label {
  padding: var(--hf-space-2) var(--hf-space-5) var(--hf-space-1);
  font-size: var(--hf-text-xs);
  font-weight: var(--hf-font-semibold);
  color: var(--hf-text-quaternary);
  text-transform: uppercase;
  letter-spacing: var(--hf-tracking-widest);
}

.hf-command-palette__item {
  display: flex;
  align-items: center;
  gap: var(--hf-space-3);
  padding: var(--hf-space-2-5) var(--hf-space-5);
  cursor: pointer;
  transition: background var(--hf-duration-fast) var(--hf-ease-in-out);
}

.hf-command-palette__item:hover,
.hf-command-palette__item[aria-selected="true"] {
  background: var(--hf-color-primary-muted);
}

.hf-command-palette__item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--hf-radius-lg);
  background: var(--hf-bg-subtle);
  color: var(--hf-text-secondary);
  flex-shrink: 0;
}

.hf-command-palette__item[aria-selected="true"] .hf-command-palette__item-icon {
  background: var(--hf-color-primary);
  color: #fff;
}

.hf-command-palette__item-text {
  flex: 1;
  min-width: 0;
}

.hf-command-palette__item-label {
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-medium);
  color: var(--hf-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hf-command-palette__item-desc {
  font-size: var(--hf-text-xs);
  color: var(--hf-text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.hf-command-palette__item-shortcut {
  flex-shrink: 0;
  display: flex;
  gap: var(--hf-space-1);
}

.hf-command-palette__footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--hf-space-4);
  padding: var(--hf-space-3) var(--hf-space-5);
  border-top: 1px solid var(--hf-border-default);
  font-size: var(--hf-text-xs);
  color: var(--hf-text-quaternary);
}

.hf-command-palette__empty,
.hf-command-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--hf-space-12) var(--hf-space-5);
  gap: var(--hf-space-2);
  color: var(--hf-text-tertiary);
  font-size: var(--hf-text-sm);
}

.hf-command-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--hf-z-top);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: clamp(4rem, 10vh, 10rem);
  padding-inline: var(--hf-space-4);
  background: var(--hf-overlay-bg);
  backdrop-filter: var(--hf-overlay-blur);
  -webkit-backdrop-filter: var(--hf-overlay-blur);
  animation: hf-fade-in var(--hf-duration-fast) var(--hf-ease-out) both;
}

.hf-command-search {
  display: flex;
  align-items: center;
  gap: var(--hf-space-3);
  padding: var(--hf-space-4) var(--hf-space-5);
  border-bottom: 1px solid var(--hf-border-default);
}

.hf-command-search-icon {
  width: 18px;
  height: 18px;
  color: var(--hf-text-tertiary);
  flex-shrink: 0;
}

.hf-command-input {
  flex: 1;
  font-size: var(--hf-text-base);
  font-family: var(--hf-font-sans);
  color: var(--hf-text-primary);
  background: none;
  border: none;
  outline: none;
  caret-color: var(--hf-color-primary);
}

.hf-command-divider {
  height: 1px;
  background: var(--hf-border-default);
}

.hf-command-results {
  max-height: 400px;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--hf-space-2) 0;
}

.hf-command-group-label {
  padding: var(--hf-space-2) var(--hf-space-5) var(--hf-space-1);
  font-size: var(--hf-text-xs);
  font-weight: var(--hf-font-semibold);
  color: var(--hf-text-quaternary);
  text-transform: uppercase;
  letter-spacing: var(--hf-tracking-widest);
}

.hf-command-item {
  display: flex;
  align-items: center;
  gap: var(--hf-space-3);
  padding: var(--hf-space-2-5) var(--hf-space-5);
  cursor: pointer;
  transition: background var(--hf-duration-fast) var(--hf-ease-in-out);
}

.hf-command-item:hover,
.hf-command-item[aria-selected="true"] {
  background: var(--hf-color-primary-muted);
}

.hf-command-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--hf-radius-lg);
  background: var(--hf-bg-subtle);
  color: var(--hf-text-secondary);
  flex-shrink: 0;
}

.hf-command-item[aria-selected="true"] .hf-command-item-icon {
  background: var(--hf-color-primary);
  color: #fff;
}

.hf-command-item-label {
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-medium);
  color: var(--hf-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hf-command-item-desc,
.hf-command-item-hint {
  font-size: var(--hf-text-xs);
  color: var(--hf-text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.hf-command-item-content {
  flex: 1;
  min-width: 0;
}

.hf-command-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--hf-space-4);
  padding: var(--hf-space-3) var(--hf-space-5);
  border-top: 1px solid var(--hf-border-default);
  font-size: var(--hf-text-xs);
  color: var(--hf-text-quaternary);
}

.hf-command-hint {
  display: inline-flex;
  align-items: center;
  gap: var(--hf-space-2);
}


/* ============================================================
   13. AVATARS  (.hf-avatar)
   ============================================================ */

.hf-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--hf-color-primary-muted);
  color: var(--hf-color-primary);
  font-family: var(--hf-font-sans);
  font-weight: var(--hf-font-semibold);
  line-height: 1;
  flex-shrink: 0;
  overflow: hidden;
  border: 2px solid var(--hf-bg-surface);
  box-shadow: var(--hf-shadow-sm);
  user-select: none;
  transition: var(--hf-transition-base);
}

/* Sizes */
.hf-avatar--xs  { width: 24px; height: 24px; font-size: 0.6rem; }
.hf-avatar--sm  { width: 32px; height: 32px; font-size: var(--hf-text-xs); }
.hf-avatar--md  { width: 40px; height: 40px; font-size: var(--hf-text-sm); }
.hf-avatar--lg  { width: 56px; height: 56px; font-size: var(--hf-text-lg); }
.hf-avatar--xl  { width: 72px; height: 72px; font-size: var(--hf-text-2xl); }
.hf-avatar--2xl { width: 96px; height: 96px; font-size: var(--hf-text-3xl); }

/* Colour variants for initials */
.hf-avatar--primary { background: var(--hf-color-primary-muted); color: var(--hf-color-primary-700); }
.hf-avatar--accent  { background: var(--hf-color-accent-muted);  color: var(--hf-color-accent-700);  }
.hf-avatar--success { background: var(--hf-color-success-muted); color: var(--hf-color-success-700); }
.hf-avatar--warning { background: var(--hf-color-warning-muted); color: var(--hf-color-warning-700); }
.hf-avatar--danger  { background: var(--hf-color-danger-muted);  color: var(--hf-color-danger-700);  }

[data-theme="dark"] .hf-avatar--primary { color: var(--hf-color-primary-300); }
[data-theme="dark"] .hf-avatar--accent  { color: var(--hf-color-accent-300);  }
[data-theme="dark"] .hf-avatar--success { color: var(--hf-color-success-300); }
[data-theme="dark"] .hf-avatar--warning { color: var(--hf-color-warning-300); }
[data-theme="dark"] .hf-avatar--danger  { color: var(--hf-color-danger-300);  }

.hf-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* Square variant */
.hf-avatar--square {
  border-radius: var(--hf-radius-lg);
}

/* Avatar group (stacked) */
.hf-avatar-group {
  display: flex;
  align-items: center;
}

.hf-avatar-group .hf-avatar {
  margin-left: -8px;
  transition: transform var(--hf-duration-fast) var(--hf-ease-spring);
}

.hf-avatar-group .hf-avatar:first-child {
  margin-left: 0;
}

.hf-avatar-group:hover .hf-avatar {
  margin-left: -4px;
}

/* Online status indicator */
.hf-avatar-wrap {
  position: relative;
  display: inline-flex;
}

.hf-avatar-wrap__status {
  position: absolute;
  bottom: 1px;
  right: 1px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--hf-bg-surface);
  background: var(--hf-color-neutral-400);
}

.hf-avatar-wrap__status--online  { background: var(--hf-color-success); }
.hf-avatar-wrap__status--away    { background: var(--hf-color-warning); }
.hf-avatar-wrap__status--busy    { background: var(--hf-color-danger);  }
.hf-avatar-wrap__status--offline { background: var(--hf-color-neutral-400); }

/* ============================================================
   14. CHIPS / TAGS  (.hf-chip)
   ============================================================ */

.hf-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--hf-space-1-5);
  padding: 0.3em 0.75em;
  font-size: var(--hf-text-xs);
  font-weight: var(--hf-font-medium);
  font-family: var(--hf-font-sans);
  line-height: var(--hf-leading-none);
  color: var(--hf-text-secondary);
  background: var(--hf-bg-subtle);
  border: 1px solid var(--hf-border-default);
  border-radius: var(--hf-radius-chip);
  white-space: nowrap;
  transition: var(--hf-transition-base);
  cursor: default;
  user-select: none;
}

.hf-chip:hover {
  background: var(--hf-bg-muted);
  border-color: var(--hf-border-strong);
  color: var(--hf-text-primary);
}

/* Colour variants */
.hf-chip--primary {
  background: var(--hf-color-primary-muted);
  border-color: rgba(59, 130, 246, 0.25);
  color: var(--hf-color-primary-700);
}

.hf-chip--success {
  background: var(--hf-color-success-muted);
  border-color: rgba(16, 185, 129, 0.25);
  color: var(--hf-color-success-700);
}

.hf-chip--warning {
  background: var(--hf-color-warning-muted);
  border-color: rgba(245, 158, 11, 0.25);
  color: var(--hf-color-warning-700);
}

.hf-chip--danger {
  background: var(--hf-color-danger-muted);
  border-color: rgba(239, 68, 68, 0.25);
  color: var(--hf-color-danger-700);
}

.hf-chip--accent {
  background: var(--hf-color-accent-muted);
  border-color: rgba(139, 92, 246, 0.25);
  color: var(--hf-color-accent-700);
}

[data-theme="dark"] .hf-chip--primary { color: var(--hf-color-primary-300); }
[data-theme="dark"] .hf-chip--success { color: var(--hf-color-success-300); }
[data-theme="dark"] .hf-chip--warning { color: var(--hf-color-warning-300); }
[data-theme="dark"] .hf-chip--danger  { color: var(--hf-color-danger-300);  }
[data-theme="dark"] .hf-chip--accent  { color: var(--hf-color-accent-300);  }

/* Remove button */
.hf-chip__remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: none;
  border: none;
  color: currentColor;
  opacity: 0.6;
  cursor: pointer;
  padding: 0;
  transition: var(--hf-transition-base);
  margin-left: var(--hf-space-0-5);
}

.hf-chip__remove:hover {
  opacity: 1;
  background: rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] .hf-chip__remove:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Chip icon */
.hf-chip__icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* Avatar chip */
.hf-chip--avatar {
  padding-left: 0.2em;
}

/* Clickable chip */
.hf-chip--clickable {
  cursor: pointer;
}

.hf-chip--clickable:active {
  transform: scale(0.97);
}

/* Selected chip */
.hf-chip--selected {
  background: var(--hf-color-primary);
  border-color: var(--hf-color-primary);
  color: #fff;
}

.hf-chip--selected:hover {
  background: var(--hf-color-primary-hover);
  border-color: var(--hf-color-primary-hover);
  color: #fff;
}

/* ============================================================
   15. DIVIDERS  (.hf-divider)
   ============================================================ */

.hf-divider {
  display: flex;
  align-items: center;
  gap: var(--hf-space-3);
  border: none;
  margin: var(--hf-space-4) 0;
}

.hf-divider::before,
.hf-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--hf-border-default);
}

.hf-divider--label {
  font-size: var(--hf-text-xs);
  font-weight: var(--hf-font-medium);
  color: var(--hf-text-quaternary);
  text-transform: uppercase;
  letter-spacing: var(--hf-tracking-widest);
  white-space: nowrap;
}

/* Vertical divider */
.hf-divider--vertical {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin: 0 var(--hf-space-4);
  width: 1px;
  height: auto;
  align-self: stretch;
}

.hf-divider--vertical::before,
.hf-divider--vertical::after {
  width: 1px;
  height: 50%;
  flex: 1;
}

/* Thickness variants */
.hf-divider--thick::before,
.hf-divider--thick::after {
  height: 2px;
}

/* No margin */
.hf-divider--flush {
  margin: 0;
}

/* Dashed */
.hf-divider--dashed::before,
.hf-divider--dashed::after {
  background: none;
  border-top: 1px dashed var(--hf-border-default);
}

/* ============================================================
   16. EMPTY STATE  (.hf-empty-state)
   ============================================================ */

.hf-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--hf-space-16) var(--hf-space-6);
  gap: var(--hf-space-4);
}

.hf-empty-state__illustration {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--hf-radius-2xl);
  background: var(--hf-bg-subtle);
  color: var(--hf-text-quaternary);
  font-size: 2rem;
  flex-shrink: 0;
}

.hf-empty-state__title {
  font-size: var(--hf-text-lg);
  font-weight: var(--hf-font-semibold);
  color: var(--hf-text-primary);
  margin: 0;
  line-height: var(--hf-leading-tight);
}

.hf-empty-state__message {
  font-size: var(--hf-text-sm);
  color: var(--hf-text-tertiary);
  max-width: 360px;
  margin: 0;
  line-height: var(--hf-leading-relaxed);
}

.hf-empty-state__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--hf-space-3);
  flex-wrap: wrap;
  margin-top: var(--hf-space-2);
}

/* Compact variant */
.hf-empty-state--compact {
  padding: var(--hf-space-8) var(--hf-space-4);
  gap: var(--hf-space-3);
}

.hf-empty-state--compact .hf-empty-state__illustration {
  width: 56px;
  height: 56px;
  font-size: 1.5rem;
}

.hf-empty-state--compact .hf-empty-state__title {
  font-size: var(--hf-text-base);
}

/* ============================================================
   17. METRIC DISPLAY  (.hf-metric)
   ============================================================ */

.hf-metric {
  display: flex;
  flex-direction: column;
  gap: var(--hf-space-1);
}

.hf-metric__value {
  font-size: var(--hf-text-4xl);
  font-weight: var(--hf-font-bold);
  color: var(--hf-text-primary);
  line-height: var(--hf-leading-none);
  letter-spacing: var(--hf-tracking-tight);
  font-variant-numeric: tabular-nums;
}

.hf-metric__value-unit {
  font-size: 0.55em;
  font-weight: var(--hf-font-semibold);
  color: var(--hf-text-tertiary);
  vertical-align: super;
  margin-left: 0.2em;
  letter-spacing: 0;
}

.hf-metric__label {
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-medium);
  color: var(--hf-text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--hf-tracking-wide);
}

.hf-metric__sub-label {
  font-size: var(--hf-text-xs);
  color: var(--hf-text-tertiary);
  display: flex;
  align-items: center;
  gap: var(--hf-space-1-5);
}

/* Size variants */
.hf-metric--sm .hf-metric__value { font-size: var(--hf-text-2xl); }
.hf-metric--sm .hf-metric__label { font-size: var(--hf-text-xs); }
.hf-metric--lg .hf-metric__value { font-size: var(--hf-text-5xl); }
.hf-metric--xl .hf-metric__value { font-size: var(--hf-text-7xl); }

/* Color variants */
.hf-metric--primary .hf-metric__value { color: var(--hf-color-primary); }
.hf-metric--success .hf-metric__value { color: var(--hf-color-success); }
.hf-metric--warning .hf-metric__value { color: var(--hf-color-warning); }
.hf-metric--danger  .hf-metric__value { color: var(--hf-color-danger);  }
.hf-metric--accent  .hf-metric__value { color: var(--hf-color-accent);  }

/* ============================================================
   18. HABIT CALENDAR CELLS  (.hf-cal-cell)
   ============================================================ */

.hf-cal-grid {
  display: grid;
  gap: 3px;
}

.hf-cal-cell {
  aspect-ratio: 1;
  border-radius: var(--hf-radius-sm);
  background: var(--hf-bg-muted);
  border: 1px solid transparent;
  transition:
    background  var(--hf-duration-fast) var(--hf-ease-in-out),
    transform   var(--hf-duration-fast) var(--hf-ease-spring),
    box-shadow  var(--hf-duration-fast) var(--hf-ease-in-out);
  cursor: default;
  position: relative;
}

.hf-cal-cell:hover {
  transform: scale(1.25);
  z-index: 1;
  box-shadow: var(--hf-shadow-md);
}

/* Intensity levels (0 = empty, 1-4 = low to high) */
.hf-cal-cell--0 { background: var(--hf-bg-muted); }

.hf-cal-cell--1 {
  background: var(--hf-color-success-200);
  border-color: rgba(16, 185, 129, 0.20);
}

.hf-cal-cell--2 {
  background: var(--hf-color-success-400);
  border-color: rgba(16, 185, 129, 0.30);
}

.hf-cal-cell--3 {
  background: var(--hf-color-success-600);
  border-color: rgba(16, 185, 129, 0.40);
}

.hf-cal-cell--4 {
  background: var(--hf-color-success-800);
  border-color: rgba(16, 185, 129, 0.60);
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.30);
}

/* Dark mode adjustments */
[data-theme="dark"] .hf-cal-cell--1 { background: rgba(16, 185, 129, 0.20); }
[data-theme="dark"] .hf-cal-cell--2 { background: rgba(16, 185, 129, 0.40); }
[data-theme="dark"] .hf-cal-cell--3 { background: rgba(16, 185, 129, 0.65); }
[data-theme="dark"] .hf-cal-cell--4 { background: var(--hf-color-success-500); box-shadow: 0 0 8px rgba(16, 185, 129, 0.50); }

/* Blue (steps/activity) variant */
.hf-cal-cell--blue-1 { background: var(--hf-color-primary-200); border-color: rgba(59, 130, 246, 0.20); }
.hf-cal-cell--blue-2 { background: var(--hf-color-primary-400); border-color: rgba(59, 130, 246, 0.30); }
.hf-cal-cell--blue-3 { background: var(--hf-color-primary-600); border-color: rgba(59, 130, 246, 0.40); }
.hf-cal-cell--blue-4 { background: var(--hf-color-primary-800); border-color: rgba(59, 130, 246, 0.60); box-shadow: 0 0 6px rgba(59, 130, 246, 0.30); }

[data-theme="dark"] .hf-cal-cell--blue-1 { background: rgba(59, 130, 246, 0.20); }
[data-theme="dark"] .hf-cal-cell--blue-2 { background: rgba(59, 130, 246, 0.40); }
[data-theme="dark"] .hf-cal-cell--blue-3 { background: rgba(59, 130, 246, 0.65); }
[data-theme="dark"] .hf-cal-cell--blue-4 { background: var(--hf-color-primary-500); }

/* Today highlight */
.hf-cal-cell--today {
  border: 2px solid var(--hf-color-primary);
}

/* Future (greyed out) */
.hf-cal-cell--future {
  opacity: 0.3;
  cursor: not-allowed;
}

.hf-cal-cell--future:hover {
  transform: none;
  box-shadow: none;
}

/* Legend */
.hf-cal-legend {
  display: flex;
  align-items: center;
  gap: var(--hf-space-1-5);
  font-size: var(--hf-text-xs);
  color: var(--hf-text-quaternary);
}

.hf-cal-legend__cell {
  width: 12px;
  height: 12px;
  border-radius: 2px;
}

/* ============================================================
   19. ACHIEVEMENT CARD  (.hf-achievement)
   ============================================================ */

.hf-achievement {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--hf-space-3);
  padding: var(--hf-space-5);
  background: var(--hf-glass-bg);
  backdrop-filter: var(--hf-glass-backdrop-blur) var(--hf-glass-saturate);
  -webkit-backdrop-filter: var(--hf-glass-backdrop-blur) var(--hf-glass-saturate);
  border: 1px solid var(--hf-glass-border);
  border-radius: var(--hf-radius-2xl);
  box-shadow: var(--hf-shadow-glass);
  transition: var(--hf-transition-base);
  position: relative;
  overflow: hidden;
}

.hf-achievement:hover {
  transform: translateY(-3px);
  box-shadow: var(--hf-shadow-card-hover);
}

/* Unlocked state */
.hf-achievement--unlocked {
  border-color: rgba(245, 158, 11, 0.40);
}

.hf-achievement--unlocked::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(251, 191, 36, 0.10) 0%,
    transparent 60%
  );
  pointer-events: none;
}

/* Locked state */
.hf-achievement--locked {
  opacity: 0.55;
  filter: grayscale(0.7);
}

.hf-achievement--locked:hover {
  transform: none;
  box-shadow: var(--hf-shadow-glass);
}

/* Icon */
.hf-achievement__icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.40);
  font-size: 1.75rem;
  transition: var(--hf-transition-base);
}

.hf-achievement--unlocked:hover .hf-achievement__icon-wrap {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 6px 24px rgba(245, 158, 11, 0.55);
}

.hf-achievement--locked .hf-achievement__icon-wrap {
  background: var(--hf-bg-muted);
  box-shadow: none;
}

/* Icon colour variants */
.hf-achievement__icon-wrap--silver {
  background: linear-gradient(135deg, #e2e8f0 0%, #94a3b8 100%);
  box-shadow: 0 4px 16px rgba(148, 163, 184, 0.40);
}

.hf-achievement__icon-wrap--bronze {
  background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  box-shadow: 0 4px 16px rgba(180, 83, 9, 0.40);
}

.hf-achievement__icon-wrap--rare {
  background: linear-gradient(135deg, var(--hf-color-accent) 0%, #7c3aed 100%);
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.40);
}

.hf-achievement__title {
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-semibold);
  color: var(--hf-text-primary);
  margin: 0;
  line-height: var(--hf-leading-tight);
}

.hf-achievement__desc {
  font-size: var(--hf-text-xs);
  color: var(--hf-text-tertiary);
  margin: 0;
  line-height: var(--hf-leading-relaxed);
}

.hf-achievement__points {
  display: inline-flex;
  align-items: center;
  gap: var(--hf-space-1);
  font-size: var(--hf-text-xs);
  font-weight: var(--hf-font-semibold);
  color: var(--hf-color-warning-700);
  background: var(--hf-color-warning-muted);
  border-radius: var(--hf-radius-full);
  padding: 0.2em 0.65em;
}

[data-theme="dark"] .hf-achievement__points { color: var(--hf-color-warning-300); }

/* Unlocked check badge */
.hf-achievement__check {
  position: absolute;
  top: var(--hf-space-3);
  right: var(--hf-space-3);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--hf-color-success);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: hf-bounce-in var(--hf-duration-moderate) var(--hf-ease-spring) both;
}

/* ============================================================
   20. SIDEBAR NAV ITEM  (.hf-nav-item)
   ============================================================ */

.hf-nav-item {
  display: flex;
  align-items: center;
  gap: var(--hf-space-3);
  padding: var(--hf-space-2-5) var(--hf-space-3);
  border-radius: var(--hf-radius-xl);
  color: var(--hf-sidebar-text);
  text-decoration: none;
  font-size: var(--hf-text-sm);
  font-weight: var(--hf-font-medium);
  font-family: var(--hf-font-sans);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  position: relative;
  transition:
    background   var(--hf-duration-normal) var(--hf-ease-in-out),
    color        var(--hf-duration-normal) var(--hf-ease-in-out),
    transform    var(--hf-duration-fast)   var(--hf-ease-spring),
    padding-left var(--hf-duration-normal) var(--hf-ease-in-out);
  white-space: nowrap;
  overflow: hidden;
}

.hf-nav-item:hover:not(.hf-nav-item--active) {
  background: var(--hf-sidebar-bg-hover);
  color: var(--hf-text-primary);
}

.hf-nav-item:active {
  transform: scale(0.98);
}

.hf-nav-item:focus-visible {
  outline: none;
  box-shadow: var(--hf-focus-ring);
}

/* Active state */
.hf-nav-item--active {
  background: var(--hf-sidebar-bg-active);
  color: var(--hf-sidebar-text-active);
  font-weight: var(--hf-font-semibold);
}

/* Active indicator bar */
.hf-nav-item--active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  border-radius: 0 var(--hf-radius-full) var(--hf-radius-full) 0;
  background: var(--hf-sidebar-text-active);
}

/* Icon */
.hf-nav-item__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--hf-sidebar-icon-size);
  height: var(--hf-sidebar-icon-size);
  flex-shrink: 0;
  transition: transform var(--hf-duration-normal) var(--hf-ease-spring);
}

.hf-nav-item:hover .hf-nav-item__icon {
  transform: scale(1.12);
}

.hf-nav-item--active .hf-nav-item__icon {
  transform: scale(1.08);
}

/* Label */
.hf-nav-item__label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: opacity var(--hf-duration-moderate) var(--hf-ease-in-out);
}

/* Badge / count */
.hf-nav-item__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 0.3em;
  font-size: 0.65rem;
  font-weight: var(--hf-font-bold);
  border-radius: var(--hf-radius-full);
  background: var(--hf-color-primary);
  color: #fff;
  flex-shrink: 0;
}

/* Collapsed sidebar — icon only */
.hf-sidebar--collapsed .hf-nav-item {
  justify-content: center;
  padding: var(--hf-space-2-5);
}

.hf-sidebar--collapsed .hf-nav-item::before {
  display: none;
}

.hf-sidebar--collapsed .hf-nav-item__label,
.hf-sidebar--collapsed .hf-nav-item__badge {
  opacity: 0;
  width: 0;
  overflow: hidden;
  pointer-events: none;
}

/* Section heading */
.hf-nav-section-label {
  padding: var(--hf-space-3) var(--hf-space-3) var(--hf-space-1);
  font-size: var(--hf-text-xs);
  font-weight: var(--hf-font-semibold);
  color: var(--hf-text-quaternary);
  text-transform: uppercase;
  letter-spacing: var(--hf-tracking-widest);
  white-space: nowrap;
  overflow: hidden;
  transition: opacity var(--hf-duration-moderate) var(--hf-ease-in-out);
}

.hf-sidebar--collapsed .hf-nav-section-label {
  opacity: 0;
  height: 0;
  padding: 0;
}

/* Sub-menu indent */
.hf-nav-item--sub {
  padding-left: calc(var(--hf-space-3) + var(--hf-sidebar-icon-size) + var(--hf-space-3));
  font-size: var(--hf-text-xs);
}

.hf-nav-item--sub::before {
  display: none;
}

/* ============================================================
   UTILITY HELPERS (used across components)
   ============================================================ */

/* Skeleton / shimmer loader */
.hf-skeleton {
  border-radius: var(--hf-radius-md);
  background: linear-gradient(
    90deg,
    var(--hf-bg-muted) 25%,
    var(--hf-bg-subtle) 50%,
    var(--hf-bg-muted) 75%
  );
  background-size: 200% 100%;
  animation: hf-shimmer 1.6s ease-in-out infinite;
}

/* Truncate */
.hf-truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Visually hidden (accessible) */
.hf-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Focus ring reset for mouse users */
.hf-focus-visible-only:focus:not(:focus-visible) {
  outline: none;
  box-shadow: none;
}

/* ============================================================
   RESPONSIVE ADJUSTMENTS
   ============================================================ */

@media (max-width: 640px) {
  .hf-toast-container {
    top: auto;
    bottom: var(--hf-space-4);
    right: var(--hf-space-4);
    left: var(--hf-space-4);
    width: auto;
  }

  .hf-toast {
    animation: hf-slide-up var(--hf-duration-moderate) var(--hf-ease-spring) both;
  }

  .hf-modal {
    border-radius: var(--hf-radius-2xl) var(--hf-radius-2xl) 0 0;
    max-height: 92vh;
    margin-top: auto;
    align-self: flex-end;
  }

  .hf-modal-backdrop {
    align-items: flex-end;
    padding: 0;
  }

  .hf-fab {
    bottom: var(--hf-space-4);
    right: var(--hf-space-4);
  }

  .hf-fab-menu {
    bottom: calc(var(--hf-space-4) + 50px);
    right: var(--hf-space-4);
  }

  .hf-fab-item {
    padding: 0.65rem 1rem;
    font-size: 0.9rem;
  }

  .hf-command-palette-backdrop {
    padding-top: var(--hf-space-4);
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hf-card,
  .hf-btn,
  .hf-progress-ring__fill,
  .hf-progress-bar__fill,
  .hf-toast,
  .hf-modal,
  .hf-modal-backdrop,
  .hf-command-palette,
  .hf-command-palette-backdrop,
  .hf-nav-item,
  .hf-achievement,
  .hf-stat-card,
  .hf-fab,
  .hf-fab-menu,
  .hf-fab-item {
    transition: none;
    animation: none;
  }

  .hf-fab::before,
  .hf-badge--streak,
  .hf-progress-bar__fill::after,
  .hf-skeleton {
    animation: none;
  }
}