/*!
 * Glass Morphism — Liquid Glass for the web
 * https://github.com/Sasivisvan/Glass-Morphism
 * MIT License · (c) 2026 Sasivisvan and contributors
 */

/* =====================================================================
 * Tokens
 * ===================================================================== */
:root {
  --lg-light: 135deg;            /* rim gradient angle; LiquidGlass.setLight() updates it */
  --lg-accent: #0a84ff;
  --lg-on: #34c759;              /* switch "on" colour */
  --lg-ease: cubic-bezier(.3, 1.4, .4, 1);
  --lg-ease-soft: cubic-bezier(.3, 1.2, .4, 1);
}

/* =====================================================================
 * Glass surface
 *
 * The backdrop (blur or refraction) is set inline by liquid-glass.js.
 * The CSS backdrop-filter below is the no-JS / unsupported fallback.
 * ===================================================================== */
:is(.lg, .lg-button, .lg-segmented, .lg-tabbar, .lg-toolbar, .lg-menu, .lg-thumb, .lg-indicator) {
  --lg-tint: rgba(255, 255, 255, .08);
  --lg-rim: 1;
  --lg-shadow: 0 8px 28px rgba(0, 0, 0, .2);
  --lg-blur: 16px;
  --lg-saturate: 180%;
  background-color: var(--lg-tint);
  box-shadow: var(--lg-shadow),
    inset 0 .5px 0 rgba(255, 255, 255, calc(.45 * var(--lg-rim))),
    inset 0 -.5px 0 rgba(255, 255, 255, calc(.12 * var(--lg-rim))),
    inset 0 0 22px rgba(255, 255, 255, calc(.05 * var(--lg-rim)));
  -webkit-backdrop-filter: blur(var(--lg-blur)) saturate(var(--lg-saturate));
  backdrop-filter: blur(var(--lg-blur)) saturate(var(--lg-saturate));
}
:where(.lg, .lg-button, .lg-segmented, .lg-tabbar, .lg-toolbar, .lg-menu) { position: relative; }

/* rim highlight: a gradient hairline lit from --lg-light */
:is(.lg, .lg-button, .lg-segmented, .lg-tabbar, .lg-toolbar, .lg-menu, .lg-thumb, .lg-indicator)::before {
  content: "";
  position: absolute; inset: 0; z-index: 0;
  border-radius: inherit;
  padding: 1px;
  pointer-events: none;
  background: linear-gradient(var(--lg-light),
    rgba(255, 255, 255, calc(.75 * var(--lg-rim))) 0%,
    rgba(255, 255, 255, calc(.12 * var(--lg-rim))) 22%,
    rgba(255, 255, 255, 0) 45%,
    rgba(255, 255, 255, 0) 60%,
    rgba(255, 255, 255, calc(.14 * var(--lg-rim))) 80%,
    rgba(255, 255, 255, calc(.5 * var(--lg-rim))) 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0);
}

/* variants — pair with the matching JS preset */
.lg--clear { --lg-tint: rgba(255, 255, 255, .04); --lg-blur: 4px; }
.lg--tinted { --lg-tint: rgba(40, 40, 46, .42); --lg-rim: .65; --lg-blur: 20px; }
.lg--dark { --lg-tint: rgba(0, 0, 0, .24); }
.lg--light { --lg-tint: rgba(255, 255, 255, .5); --lg-rim: .6; color: #000; }
.lg--frosted { --lg-tint: rgba(30, 30, 32, .6); --lg-blur: 22px; --lg-rim: .5; }
.lg--flat { --lg-shadow: none; }

.lg--pill { border-radius: 999px; }
.lg--circle { border-radius: 50%; aspect-ratio: 1; }

/* =====================================================================
 * Button
 * ===================================================================== */
.lg-button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 50px; padding: 0 24px;
  border: 0; border-radius: 999px;
  font-family: inherit; font-weight: 600; font-size: 17px; line-height: 1; color: #fff;
  text-shadow: 0 1px 6px rgba(0, 0, 0, .3);
  cursor: pointer; overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  transition: transform .5s cubic-bezier(.25, 1.6, .4, 1);
}
.lg-button > * { position: relative; z-index: 1; }
.lg-button::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  opacity: 0; transition: opacity .35s;
  background: radial-gradient(120px circle at var(--lg-px, 50%) var(--lg-py, 50%), rgba(255, 255, 255, .35), transparent 60%);
}
.lg-button.is-pressed { transform: scale(1.1); }
.lg-button.is-pressed::after { opacity: 1; }
.lg-button:focus-visible { outline: 2px solid var(--lg-accent); outline-offset: 3px; }
.lg-button--prominent { --lg-tint: color-mix(in srgb, var(--lg-accent) 75%, transparent); text-shadow: none; }
.lg-button--icon { width: 50px; padding: 0; font-size: 21px; }
.lg-button--small { height: 36px; padding: 0 16px; font-size: 15px; }
.lg-button--small.lg-button--icon { width: 36px; padding: 0; font-size: 17px; }

/* =====================================================================
 * Thumb (switch / slider)
 * Solid white at rest, a magnifying lens while pressed.
 * ===================================================================== */
.lg-thumb {
  position: absolute; z-index: 1;
  background-color: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, .25);
  pointer-events: none;
  transition: transform .45s var(--lg-ease), background-color .25s, left .3s var(--lg-ease-soft);
}
.lg-thumb:not(.is-lens) { -webkit-backdrop-filter: none !important; backdrop-filter: none !important; }
.lg-thumb::before { opacity: 0; transition: opacity .25s; }
.lg-thumb.is-lens { background-color: rgba(255, 255, 255, .06); box-shadow: 0 6px 18px rgba(0, 0, 0, .2); transition: transform .35s cubic-bezier(.3, 1.6, .4, 1), background-color .25s; }
.lg-thumb.is-lens::before { opacity: 1; }

/* =====================================================================
 * Switch — <label class="lg-switch"><input type="checkbox"></label>
 * ===================================================================== */
.lg-switch {
  position: relative; display: inline-block; flex: none;
  width: 64px; height: 28px; border-radius: 14px;
  background: rgba(120, 120, 128, .4);
  cursor: pointer; touch-action: none;
  transition: background .3s;
}
.lg-switch.is-on, .lg-switch:has(input:checked) { background: var(--lg-on); }
.lg-switch input, .lg-slider input { position: absolute; opacity: 0; width: 1px; height: 1px; margin: 0; pointer-events: none; }
.lg-switch:has(input:focus-visible), .lg-slider:has(input:focus-visible) { outline: 2px solid var(--lg-accent); outline-offset: 4px; }
.lg-switch:has(input:disabled), .lg-slider:has(input:disabled) { opacity: .45; cursor: default; }
.lg-switch .lg-thumb { top: 2px; left: 2px; width: 38px; height: 24px; border-radius: 12px; }
.lg-switch.is-on .lg-thumb { left: 24px; }
.lg-switch .lg-thumb.is-lens { transform: scale(1.45, 1.55); }

/* =====================================================================
 * Slider — <div class="lg-slider"><input type="range"></div>
 * ===================================================================== */
.lg-slider { position: relative; display: block; width: 100%; height: 30px; cursor: pointer; touch-action: none; --lg-value: .5; }
.lg-slider__track { position: absolute; left: 0; right: 0; top: 12px; height: 6px; border-radius: 3px; background: rgba(255, 255, 255, .35); overflow: hidden; }
.lg-slider__fill { position: absolute; left: 0; top: 0; bottom: 0; width: calc(var(--lg-value) * 100%); background: var(--lg-accent); }
.lg-slider .lg-thumb { top: 3px; left: calc(var(--lg-value) * (100% - 38px)); width: 38px; height: 24px; border-radius: 12px; transition: transform .45s var(--lg-ease), background-color .25s; }
.lg-slider .lg-thumb.is-lens { transform: scale(1.7, 1.75); }

/* =====================================================================
 * Indicator (segmented / tab bar selection droplet)
 * ===================================================================== */
.lg-indicator {
  position: absolute; z-index: 2; pointer-events: none;
  --lg-tint: rgba(255, 255, 255, .2); --lg-shadow: 0 2px 8px rgba(0, 0, 0, .15);
  --lg-blur: 0px; --lg-saturate: 100%;
  border-radius: inherit;
  transition: left .45s var(--lg-ease-soft), top .45s var(--lg-ease-soft), width .45s var(--lg-ease-soft), transform .4s var(--lg-ease), background-color .25s;
}
.lg-indicator.is-lens { --lg-tint: rgba(255, 255, 255, .03); transform: scale(1.18, 1.3); transition: transform .35s cubic-bezier(.3, 1.6, .4, 1); }
.lg-indicator:not(.is-lens)::before { opacity: .35; }

/* =====================================================================
 * Segmented control — <div class="lg-segmented"><button>…</button>…</div>
 * ===================================================================== */
.lg-segmented {
  display: inline-flex; height: 44px; padding: 3px; border-radius: 22px;
  touch-action: none; user-select: none;
}
.lg-segmented > button {
  position: relative; z-index: 1; flex: 1; min-width: 72px; padding: 0 14px;
  border: 0; border-radius: 19px; background: none; cursor: pointer;
  font-family: inherit; font-weight: 600; font-size: 15px; line-height: 1; color: #fff; text-shadow: 0 1px 4px rgba(0, 0, 0, .3);
}
.lg-segmented > button:focus-visible { outline: 2px solid var(--lg-accent); outline-offset: -2px; }
.lg-segmented .lg-indicator { border-radius: 19px; }

/* =====================================================================
 * Tab bar — <nav class="lg-tabbar"><button class="lg-tabbar__item">…</button>…</nav>
 * ===================================================================== */
.lg-tabbar {
  display: flex; height: 64px; padding: 4px; border-radius: 32px;
  touch-action: none; user-select: none;
  --lg-tint: rgba(18, 18, 20, .28);
}
.lg-tabbar__item {
  position: relative; z-index: 1; flex: 1; min-width: 64px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  border: 0; border-radius: 28px; background: none; cursor: pointer;
  font-family: inherit; font-weight: 600; font-size: 10.5px; line-height: 1; color: #fff; text-decoration: none;
}
.lg-tabbar__item > svg, .lg-tabbar__item > .lg-icon { width: 24px; height: 24px; }
.lg-tabbar__item[aria-current] { color: var(--lg-accent); }
.lg-tabbar__item:focus-visible { outline: 2px solid var(--lg-accent); outline-offset: -2px; }
.lg-tabbar .lg-indicator { border-radius: 28px; --lg-tint: rgba(255, 255, 255, .12); }

/* =====================================================================
 * Toolbar — a capsule that groups icon buttons
 * ===================================================================== */
.lg-toolbar { display: inline-flex; align-items: center; height: 52px; padding: 0 6px; border-radius: 26px; }
.lg-toolbar > button, .lg-toolbar > a {
  position: relative; z-index: 1;
  display: grid; place-items: center; width: 48px; height: 44px;
  border: 0; background: none; color: #fff; cursor: pointer; font-size: 21px;
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, .3));
}
.lg-toolbar > hr { width: .5px; height: 24px; margin: 0 2px; border: 0; background: rgba(255, 255, 255, .35); }

/* =====================================================================
 * Morphing menu
 * ===================================================================== */
.lg-menu {
  display: inline-block; overflow: hidden; border-radius: 25px; color: #fff;
  transition: width .55s var(--lg-ease-soft), height .55s var(--lg-ease-soft), border-radius .55s;
}
.lg-menu.is-open { border-radius: 30px; }
.lg-menu__trigger {
  position: absolute; top: 0; right: 0; z-index: 1;
  display: grid; place-items: center; width: 50px; height: 50px;
  border: 0; background: none; color: inherit; cursor: pointer; font-size: 21px;
  transition: opacity .2s;
}
.lg-menu.is-open .lg-menu__trigger { opacity: 0; pointer-events: none; }
.lg-menu__panel {
  position: relative; z-index: 1; width: max-content; min-width: 220px; padding: 8px;
  opacity: 0; pointer-events: none; transition: opacity .2s;
}
.lg-menu.is-open .lg-menu__panel { opacity: 1; pointer-events: auto; transition: opacity .3s .18s; }
.lg-menu__item {
  display: flex; justify-content: space-between; align-items: center; gap: 24px; width: 100%;
  padding: 11px 12px; border: 0; border-radius: 12px; background: none; color: inherit; cursor: pointer;
  font-family: inherit; font-weight: 500; font-size: 16px; line-height: 1.2; text-align: left; text-shadow: 0 1px 6px rgba(0, 0, 0, .35);
}
.lg-menu__item:hover, .lg-menu__item:focus-visible { background: rgba(255, 255, 255, .12); outline: none; }

/* =====================================================================
 * Accessibility
 * ===================================================================== */
@media (prefers-reduced-transparency: reduce) {
  :is(.lg, .lg-button, .lg-segmented, .lg-tabbar, .lg-toolbar, .lg-menu) {
    -webkit-backdrop-filter: none !important; backdrop-filter: none !important;
    --lg-tint: rgba(40, 40, 44, .96);
  }
}
@media (prefers-reduced-motion: reduce) {
  :is(.lg-button, .lg-thumb, .lg-indicator, .lg-menu, .lg-switch) { transition-duration: .01ms !important; }
}