/*!
 * HTML Design System
 * A pure CSS/JS component library inspired by contemporary mobile interface patterns.
 * Font Awesome Free icons are loaded by the demo from CDN; see documentation for attribution.
 */

:root {
  color-scheme: light;
  --hds-blue: #007aff;
  --hds-brown: #a2845e;
  --hds-cyan: #32ade6;
  --hds-green: #34c759;
  --hds-indigo: #5856d6;
  --hds-mint: #00c7be;
  --hds-orange: #ff9500;
  --hds-pink: #ff2d55;
  --hds-purple: #af52de;
  --hds-red: #ff3b30;
  --hds-teal: #30b0c7;
  --hds-yellow: #ffcc00;
  --hds-gray: #8e8e93;
  --hds-gray-2: #aeaeb2;
  --hds-gray-3: #c7c7cc;
  --hds-gray-4: #d1d1d6;
  --hds-gray-5: #e5e5ea;
  --hds-gray-6: #f2f2f7;
  --hds-app-bg: #f2f2f7;
  --hds-view-bg: #f6f6f8;
  --hds-label: #1c1c1e;
  --hds-secondary-label: #6e6e73;
  --hds-tertiary-label: #8a8a8e;
  --hds-fill: rgba(120, 120, 128, 0.16);
  --hds-fill-strong: rgba(120, 120, 128, 0.24);
  --hds-surface: rgba(248, 248, 250, 0.82);
  --hds-card: #ffffff;
  --hds-elevated: rgba(255, 255, 255, 0.84);
  --hds-glass: rgba(255, 255, 255, 0.72);
  --hds-tab-glass: rgba(255, 255, 255, 0.78);
  --hds-tab-active: rgba(120, 120, 128, 0.18);
  --hds-border: rgba(60, 60, 67, 0.12);
  --hds-separator: rgba(60, 60, 67, 0.18);
  --hds-shadow: 0 22px 60px rgba(34, 34, 44, 0.14);
  --hds-radius-sm: 13px;
  --hds-radius: 28px;
  --hds-radius-lg: 36px;
  --hds-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --hds-spring: cubic-bezier(0.18, 0.9, 0.22, 1);
  --hds-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --hds-label: #f5f5f7;
    --hds-secondary-label: #aeaeb2;
    --hds-tertiary-label: #8e8e93;
    --hds-fill: rgba(120, 120, 128, 0.28);
    --hds-fill-strong: rgba(120, 120, 128, 0.36);
    --hds-app-bg: #000000;
    --hds-view-bg: #000000;
    --hds-surface: rgba(0, 0, 0, 0.78);
    --hds-card: #1c1c1e;
    --hds-elevated: rgba(28, 28, 30, 0.9);
    --hds-glass: rgba(28, 28, 30, 0.76);
    --hds-tab-glass: rgba(24, 24, 26, 0.82);
    --hds-tab-active: rgba(120, 120, 128, 0.28);
    --hds-border: rgba(235, 235, 245, 0.1);
    --hds-separator: rgba(235, 235, 245, 0.14);
    --hds-gray-6: #1c1c1e;
    --hds-shadow: 0 18px 50px rgba(0, 0, 0, 0.42);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--hds-app-bg);
}

body {
  min-height: 100%;
  margin: 0;
  color: var(--hds-label);
  font-family: var(--hds-font);
  font-size: 17px;
  letter-spacing: 0;
  background: var(--hds-app-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-color-scheme: dark) {
  html {
    background: var(--hds-app-bg);
  }
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
}

.hds-app {
  min-height: 100vh;
  color: var(--hds-label);
}

.hds-page {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 40px;
}

.hds-layout {
  display: grid;
  grid-template-columns: minmax(260px, 350px) minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.hds-section {
  margin: 0 0 24px;
}

.hds-section-title {
  margin: 0 0 10px;
  padding: 0 8px;
  color: var(--hds-secondary-label);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.25;
  text-transform: uppercase;
}

.hds-headline {
  margin: 0;
  font-size: clamp(32px, 5vw, 58px);
  font-weight: 760;
  line-height: 0.96;
}

.hds-subtitle {
  max-width: 760px;
  margin: 14px 0 0;
  color: var(--hds-secondary-label);
  font-size: 19px;
  line-height: 1.45;
}

.hds-device {
  overflow: hidden;
  min-height: 680px;
  border: 1px solid var(--hds-border);
  border-radius: 38px;
  background: var(--hds-view-bg);
  box-shadow: var(--hds-shadow);
}

.hds-device.hds-demo-compact {
  transform: scale(0.9);
  transform-origin: top center;
  width: 111.12%;
  margin-right: -5.56%;
  margin-left: -5.56%;
  margin-bottom: -68px;
}

.hds-full-demo {
  min-height: 100vh;
  display: grid;
  padding: 20px;
  place-items: center;
}

.hds-full-demo .hds-device {
  width: min(430px, 100%);
  min-height: min(860px, calc(100vh - 40px));
}

.hds-nav-bar,
.hds-toolbar,
.hds-tab-bar {
  background: var(--hds-surface);
  backdrop-filter: blur(22px) saturate(170%);
  -webkit-backdrop-filter: blur(22px) saturate(170%);
}

.hds-nav-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(70px, 1fr) auto minmax(70px, 1fr);
  align-items: center;
  min-height: 56px;
  padding: 12px 16px;
  border-bottom: 0;
}

.hds-nav-title {
  justify-self: center;
  margin: 0;
  font-size: 22px;
  font-weight: 760;
  line-height: 1.2;
}

.hds-nav-leading,
.hds-nav-trailing {
  display: flex;
  gap: 8px;
  align-items: center;
}

.hds-nav-trailing {
  justify-content: flex-end;
}

.hds-button {
  display: inline-flex;
  min-height: 42px;
  padding: 9px 14px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border-radius: 999px;
  color: var(--hds-blue);
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 180ms var(--hds-ease), background 180ms var(--hds-ease), opacity 180ms var(--hds-ease);
  -webkit-tap-highlight-color: transparent;
}

.hds-button:hover {
  background: var(--hds-fill);
}

.hds-button:active {
  transform: scale(0.96);
  opacity: 0.78;
}

.hds-button-filled {
  color: #fff;
  background: var(--hds-blue);
  font-weight: 650;
}

.hds-button-filled:hover {
  background: #0a84ff;
}

.hds-icon-button {
  width: 48px;
  height: 48px;
  padding: 0;
  color: var(--hds-label);
  background: var(--hds-elevated);
  box-shadow: inset 0 0 0 1px var(--hds-border);
}

.hds-button[data-hds-back] {
  width: 58px;
  height: 58px;
  padding: 0;
  border-radius: 50%;
  color: var(--hds-label);
  background: var(--hds-elevated);
  box-shadow: inset 0 0 0 1px var(--hds-border);
  font-size: 0;
}

.hds-button[data-hds-back] i {
  font-size: 28px;
}

.hds-table {
  overflow: hidden;
  border: 0;
  border-radius: var(--hds-radius);
  background: var(--hds-card);
}

.hds-list-item {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  min-height: 76px;
  padding: 14px 16px;
  color: inherit;
  text-decoration: none;
  transition: background 160ms var(--hds-ease);
}

.hds-list-item:not(:last-child)::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 76px;
  height: 1px;
  background: var(--hds-separator);
  content: "";
}

.hds-list-item[href],
button.hds-list-item {
  width: 100%;
  text-align: left;
  cursor: pointer;
}

.hds-list-item:hover {
  background: rgba(120, 120, 128, 0.1);
}

.hds-list-icon {
  display: inline-grid;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  place-items: center;
  color: #fff;
  font-size: 22px;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.32);
}

.blue { background: var(--hds-blue); }
.green { background: var(--hds-green); }
.indigo { background: var(--hds-indigo); }
.orange { background: var(--hds-orange); }
.pink { background: var(--hds-pink); }
.purple { background: var(--hds-purple); }
.red { background: var(--hds-red); }
.teal { background: var(--hds-teal); }
.yellow { background: var(--hds-yellow); color: #2c2c2e; }
.gray { background: var(--hds-gray); }

.hds-list-title {
  display: block;
  overflow: hidden;
  font-size: 21px;
  font-weight: 520;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hds-list-subtitle {
  display: block;
  overflow: hidden;
  margin-top: 5px;
  color: var(--hds-secondary-label);
  font-size: 16px;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hds-list-value {
  color: var(--hds-secondary-label);
  font-size: 19px;
}

.hds-chevron {
  color: var(--hds-tertiary-label);
  font-size: 19px;
}

.hds-panel-nav {
  position: relative;
  overflow: hidden;
  min-height: 640px;
  height: 100%;
  background: var(--hds-view-bg);
  touch-action: pan-y;
}

.hds-device > .hds-panel-nav {
  min-height: inherit;
}

.hds-view {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  overflow: auto;
  background: var(--hds-view-bg);
  transform: translateX(100%);
  transition: transform 360ms var(--hds-spring), filter 360ms var(--hds-spring);
  will-change: transform;
}

.hds-view.is-active {
  transform: translateX(0);
}

.hds-view.is-before {
  filter: brightness(0.95);
  transform: translateX(-28%);
}

.hds-view-content {
  flex: 1;
  padding: 22px 16px 24px;
}

.hds-view.is-dragging,
.hds-view.is-dragging + .hds-view {
  transition: none;
}

.hds-tab-bar {
  position: sticky;
  bottom: 0;
  z-index: 20;
  display: flex;
  min-height: 92px;
  padding: 10px 12px 16px;
  border-top: 0;
  background: transparent;
  align-items: center;
  gap: 12px;
}

.hds-tab-bar-static {
  position: relative;
  bottom: auto;
}

.hds-tab-list {
  position: relative;
  display: grid;
  flex: 1;
  grid-template-columns: repeat(var(--hds-tab-count, 4), minmax(0, 1fr));
  min-width: 0;
  min-height: 74px;
  padding: 5px;
  border: 1px solid var(--hds-border);
  border-radius: 999px;
  background: var(--hds-tab-glass);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.1), 0 10px 34px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
}

.hds-tab-indicator {
  position: absolute;
  top: 5px;
  bottom: 5px;
  left: 5px;
  width: calc((100% - 10px) / var(--hds-tab-count, 4));
  border-radius: 999px;
  background: var(--hds-tab-active);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.12);
  transform: translateX(calc(var(--hds-active-tab, 0) * 100%));
  transition: transform 420ms cubic-bezier(0.22, 1.18, 0.28, 1), width 240ms var(--hds-ease), opacity 200ms var(--hds-ease);
  pointer-events: none;
}

.hds-tab {
  position: relative;
  z-index: 1;
  display: grid;
  min-width: 0;
  color: var(--hds-secondary-label);
  background: transparent;
  cursor: pointer;
  place-items: center;
  gap: 3px;
  text-decoration: none;
  transition: color 260ms var(--hds-ease), transform 260ms var(--hds-spring), opacity 220ms var(--hds-ease);
}

.hds-tab i {
  font-size: 27px;
  line-height: 1;
  transition: transform 360ms var(--hds-spring);
}

.hds-tab span {
  overflow: hidden;
  max-width: 100%;
  font-size: 15px;
  font-weight: 720;
  line-height: 1.1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hds-tab.is-active,
.hds-tab[aria-selected="true"] {
  color: var(--hds-blue);
}

.hds-tab.is-active i,
.hds-tab[aria-selected="true"] i {
  transform: translateY(-1px) scale(1.04);
}

.hds-tab:active {
  transform: scale(0.94);
}

.hds-tab-badge {
  position: absolute;
  top: 1px;
  left: 50%;
  min-width: 28px;
  height: 24px;
  padding: 2px 7px;
  border-radius: 999px;
  color: #fff;
  background: var(--hds-red);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.22);
  font-size: 15px;
  font-weight: 760;
  line-height: 20px;
  transform: translateX(5px);
}

.hds-tab-search {
  flex: 0 0 74px;
  width: 74px;
  height: 74px;
  border: 1px solid var(--hds-border);
  border-radius: 50%;
  color: var(--hds-label);
  background: var(--hds-tab-glass);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.1), 0 10px 34px rgba(0, 0, 0, 0.18);
  cursor: pointer;
  transition: transform 260ms var(--hds-spring), background 220ms var(--hds-ease);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
}

.hds-tab-search i {
  font-size: 30px;
}

.hds-tab-search:active {
  transform: scale(0.92);
}

.hds-toolbar {
  display: flex;
  min-height: 52px;
  padding: 8px 12px;
  border-top: 1px solid var(--hds-border);
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.hds-toolbar-group {
  display: flex;
  gap: 6px;
  align-items: center;
}

.hds-segmented {
  display: inline-grid;
  grid-auto-columns: 1fr;
  grid-auto-flow: column;
  gap: 4px;
  width: 100%;
  min-height: 58px;
  padding: 5px;
  border-radius: 28px;
  background: var(--hds-fill);
}

.hds-segmented button {
  position: relative;
  z-index: 1;
  min-width: 86px;
  min-height: 48px;
  border-radius: 24px;
  color: var(--hds-label);
  background: transparent;
  cursor: pointer;
  font-size: 19px;
  font-weight: 650;
  transition: background 180ms var(--hds-ease), box-shadow 180ms var(--hds-ease), transform 180ms var(--hds-ease);
}

.hds-segmented button[aria-pressed="true"] {
  background: var(--hds-fill-strong);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.hds-segmented button:active {
  transform: scale(0.97);
}

.hds-switch {
  position: relative;
  display: inline-flex;
  width: 74px;
  height: 42px;
  align-items: center;
}

.hds-switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.hds-switch span {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: var(--hds-fill-strong);
  cursor: pointer;
  transition: background 220ms var(--hds-ease);
}

.hds-switch span::after {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.24);
  content: "";
  transition: transform 260ms var(--hds-spring);
}

.hds-switch input:checked + span {
  background: var(--hds-green);
}

.hds-switch input:checked + span::after {
  transform: translateX(32px);
}

.hds-stepper {
  display: inline-grid;
  overflow: hidden;
  grid-template-columns: 42px minmax(48px, auto) 42px;
  min-height: 42px;
  border: 0;
  border-radius: 999px;
  background: var(--hds-card);
}

.hds-stepper button,
.hds-stepper output {
  display: grid;
  min-width: 0;
  place-items: center;
}

.hds-stepper button {
  color: var(--hds-blue);
  background: transparent;
  cursor: pointer;
  transition: background 160ms var(--hds-ease), opacity 160ms var(--hds-ease);
}

.hds-stepper button:hover {
  background: var(--hds-fill);
}

.hds-stepper button:disabled {
  opacity: 0.35;
  cursor: default;
}

.hds-stepper output {
  padding: 0 8px;
  border-right: 1px solid var(--hds-border);
  border-left: 1px solid var(--hds-border);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
}

.hds-slider {
  display: grid;
  gap: 8px;
}

.hds-slider input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 34px;
  margin: 0;
  background: transparent;
  accent-color: var(--hds-blue);
}

.hds-slider input[type="range"]::-webkit-slider-runnable-track {
  height: 9px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--hds-blue), var(--hds-blue)) 0 / var(--hds-range, 50%) 100% no-repeat, var(--hds-fill-strong);
}

.hds-slider input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 38px;
  height: 38px;
  margin-top: -14.5px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.28);
}

.hds-slider input[type="range"]::-moz-range-track {
  height: 9px;
  border-radius: 999px;
  background: var(--hds-fill-strong);
}

.hds-slider input[type="range"]::-moz-range-progress {
  height: 9px;
  border-radius: 999px;
  background: var(--hds-blue);
}

.hds-slider input[type="range"]::-moz-range-thumb {
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.28);
}

.hds-slider-row {
  display: flex;
  color: var(--hds-secondary-label);
  font-size: 13px;
  justify-content: space-between;
}

.hds-progress {
  overflow: hidden;
  height: 10px;
  border-radius: 999px;
  background: var(--hds-fill);
}

.hds-progress span {
  display: block;
  width: calc(var(--progress, 0) * 1%);
  height: 100%;
  border-radius: inherit;
  background: var(--hds-blue);
  transition: width 320ms var(--hds-ease);
}

.hds-activity {
  width: 28px;
  height: 28px;
  border: 3px solid var(--hds-fill-strong);
  border-top-color: var(--hds-gray);
  border-radius: 50%;
  animation: hds-spin 860ms linear infinite;
}

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

.hds-collection {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.hds-collection-item {
  min-height: 148px;
  padding: 16px;
  border: 0;
  border-radius: var(--hds-radius);
  background: var(--hds-card);
  box-shadow: 0 8px 22px rgba(36, 36, 46, 0.06);
  transition: transform 200ms var(--hds-ease), box-shadow 200ms var(--hds-ease), background 200ms var(--hds-ease);
}

.hds-collection-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(36, 36, 46, 0.1);
}

.hds-collection-symbol {
  display: grid;
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  border-radius: 12px;
  color: #fff;
  place-items: center;
}

.hds-collection-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}

.hds-collection-meta {
  margin: 4px 0 0;
  color: var(--hds-secondary-label);
  font-size: 13px;
}

.hds-action-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  padding: 16px;
  background: rgba(0, 0, 0, 0);
  opacity: 0;
  pointer-events: none;
  place-items: end center;
  transition: opacity 260ms var(--hds-ease), background 260ms var(--hds-ease);
}

.hds-action-backdrop.is-open {
  background: rgba(0, 0, 0, 0.24);
  opacity: 1;
  pointer-events: auto;
}

.hds-action-sheet {
  width: min(420px, 100%);
  transform: translateY(24px) scale(0.98);
  transition: transform 300ms var(--hds-spring);
}

.hds-action-backdrop.is-open .hds-action-sheet {
  transform: translateY(0) scale(1);
}

.hds-action-group {
  overflow: hidden;
  margin-bottom: 8px;
  border-radius: var(--hds-radius);
  background: var(--hds-card);
  backdrop-filter: blur(22px) saturate(170%);
  -webkit-backdrop-filter: blur(22px) saturate(170%);
}

.hds-action-title {
  margin: 0;
  padding: 14px 18px 12px;
  color: var(--hds-secondary-label);
  font-size: 13px;
  line-height: 1.35;
  text-align: center;
}

.hds-action {
  display: block;
  width: 100%;
  min-height: 52px;
  border-top: 1px solid var(--hds-border);
  color: var(--hds-blue);
  background: transparent;
  cursor: pointer;
  font-size: 20px;
  text-align: center;
}

.hds-action.destructive {
  color: var(--hds-red);
}

.hds-action.cancel {
  border: 0;
  font-weight: 700;
}

.hds-pill {
  display: inline-flex;
  min-height: 28px;
  padding: 5px 10px;
  border-radius: 999px;
  color: var(--hds-secondary-label);
  background: var(--hds-fill);
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 650;
}

.hds-doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}

.hds-doc-card {
  padding: 16px;
  border: 1px solid var(--hds-border);
  border-radius: var(--hds-radius);
  background: var(--hds-card);
}

.hds-doc-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.hds-doc-card p,
.hds-doc-card li {
  color: var(--hds-secondary-label);
  font-size: 15px;
  line-height: 1.45;
}

.hds-code {
  overflow: auto;
  padding: 14px;
  border: 1px solid var(--hds-border);
  border-radius: var(--hds-radius-sm);
  background: rgba(0, 0, 0, 0.06);
  font-size: 13px;
}

@media (max-width: 860px) {
  .hds-page {
    width: min(100% - 20px, 680px);
    padding-top: 16px;
  }

  .hds-layout {
    grid-template-columns: 1fr;
  }

  .hds-device {
    min-height: 720px;
    border-radius: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}