/* Hourglass web app — a faithful port of the Android screens.
   Pure black, hairline type, letter-spaced capitals; colour only ever comes
   from the materials themselves (water, fire). */

:root {
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI Variable Display", "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
  --white: #fff;
  --w95: rgba(255, 255, 255, 0.95);
  --w85: rgba(255, 255, 255, 0.85);
  --w75: rgba(255, 255, 255, 0.75);
  --w60: rgba(255, 255, 255, 0.6);
  --w45: rgba(255, 255, 255, 0.45);
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
  color-scheme: dark;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
  background: #000;
  color: var(--white);
  font-family: var(--font);
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
}

:focus-visible {
  outline: 1px solid var(--w75);
  outline-offset: 4px;
  border-radius: 6px;
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* Letter-spaced capitals. The negative right margin cancels the trailing
   gap so spaced words stay optically centred. */
.sp {
  --ls: 0.5em;
  text-transform: uppercase;
  letter-spacing: var(--ls);
  margin-right: calc(-1 * var(--ls));
}

/* ---------------------------------------------------------------- setup */

.setup {
  min-height: 100vh;
  min-height: 100svh;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: calc(8px + var(--safe-t)) calc(24px + var(--safe-r)) calc(16px + var(--safe-b))
    calc(24px + var(--safe-l));
}

.top {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding-top: 24px;
}

.title {
  margin: 0;
  font-size: 12px;
  font-weight: 300;
  color: var(--w75);
  text-align: center;
}
.title .sp {
  --ls: 0.55em;
}

.corner {
  justify-self: start;
  padding: 12px 8px;
  font-size: 10px;
  color: rgba(255, 255, 255, 0.55);
  transition: color 0.2s;
}
.corner:last-child {
  justify-self: end;
}
.corner .sp {
  --ls: 0.4em;
}
.corner:hover {
  color: var(--white);
}

/* Mode filmstrip */
.modes-wrap {
  position: relative;
  width: calc(100% + 48px);
  margin: 0 -24px;
}
.modes-wrap::before,
.modes-wrap::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 48px;
  pointer-events: none;
  z-index: 1;
}
.modes-wrap::before {
  left: 0;
  background: linear-gradient(90deg, #000, transparent);
}
.modes-wrap::after {
  right: 0;
  background: linear-gradient(270deg, #000, transparent);
}
.modes {
  display: flex;
  gap: 28px;
  overflow-x: auto;
  padding: 4px 48px;
  scrollbar-width: none;
  scroll-behavior: smooth;
}
.modes::-webkit-scrollbar {
  display: none;
}
.mode {
  flex: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 8px 4px;
  font-size: 11px;
  color: var(--w45);
  transition: color 0.2s;
}
.mode:first-child {
  margin-left: auto;
}
.mode:last-child {
  margin-right: auto;
}
.mode .sp {
  --ls: 0.5em;
}
.mode::after {
  content: "";
  width: 20px;
  height: 1px;
  background: transparent;
  transition: background 0.25s;
}
.mode[aria-checked="true"] {
  color: var(--white);
  font-weight: 500;
}
.mode[aria-checked="true"]::after {
  background: var(--w85);
}
.mode:hover {
  color: var(--white);
}

/* Presets */
.presets {
  width: 100%;
  display: flex;
  justify-content: space-evenly;
  padding: 0 8px;
}
.presets button {
  padding: 10px 6px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.78);
  transition: color 0.2s;
}
.presets button:hover {
  color: var(--white);
}

/* Time picker */
.picker {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-evenly;
}
.col {
  display: flex;
  flex-direction: column;
  align-items: center;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  cursor: ns-resize;
}
.col .lbl {
  font-size: 11px;
  color: var(--w60);
  margin-bottom: 8px;
}
.arrow {
  width: 44px;
  height: 40px;
  display: grid;
  place-items: center;
  color: var(--w60);
  transition: color 0.2s;
}
.arrow:hover {
  color: var(--white);
}
.arrow svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.num {
  font-size: clamp(54px, 7.5vh, 76px);
  font-weight: 300;
  line-height: 1.12;
  font-variant-numeric: tabular-nums;
  min-width: 2.1ch;
  text-align: center;
  border-radius: 8px;
}
.colon {
  font-size: clamp(40px, 5.5vh, 56px);
  color: var(--w45);
  padding-bottom: 24px;
}
.picker.nudge {
  animation: nudge 0.36s ease;
}
@keyframes nudge {
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* START — thin letters over a single hairline */
.start,
.line-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
}
.start {
  margin-bottom: 40px;
  font-size: 18px;
}
.start .sp {
  --ls: 0.55em;
}
.start::after,
.line-btn::after {
  content: "";
  width: 56px;
  height: 1px;
  background: var(--w85);
  transition: width 0.3s ease;
}
.start:hover::after,
.line-btn:hover::after {
  width: 84px;
}

/* ------------------------------------------------------------- running */

.run {
  position: fixed;
  inset: 0;
  overflow: hidden;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}
.run.can-draw {
  cursor: crosshair;
}
#stage {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.hint {
  position: absolute;
  top: calc(20px + var(--safe-t));
  left: 16px;
  right: 16px;
  margin: 0;
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.55);
  opacity: 0;
  transition: opacity 0.8s ease;
  pointer-events: none;
}
.hint.on {
  opacity: 1;
}

.reveal {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.88);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}
.reveal.on {
  opacity: 1;
  transition-duration: 0.15s;
}
.reveal .lbl,
.paused .lbl {
  font-size: 12px;
  color: var(--w75);
  margin-bottom: 16px;
}
.reveal .time,
.paused .time {
  font-size: clamp(40px, 11vw, 88px);
  font-weight: 300;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.controls {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 20px calc(24px + var(--safe-r)) calc(20px + var(--safe-b)) calc(24px + var(--safe-l));
  pointer-events: none;
  transition: opacity 0.6s ease;
}
.pill {
  pointer-events: auto;
  padding: 9px 16px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  font-size: 12px;
  color: var(--w95);
}
.pill .sp {
  --ls: 0.35em;
}
.pill:hover {
  background: rgba(0, 0, 0, 0.8);
}

/* Behind the pause overlay only the frozen scene should show through. */
.run.frozen .controls,
.run.frozen .hint {
  visibility: hidden;
}

/* Desktop: fade chrome and cursor away while you watch. */
@media (hover: hover) {
  .run.idle {
    cursor: none;
  }
  .run.idle .controls {
    opacity: 0;
  }
}

/* -------------------------------------------------------------- paused */

.paused {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: calc(56px + var(--safe-t)) 24px calc(40px + var(--safe-b));
  background: rgba(0, 0, 0, 0.9);
  animation: fade-in 0.25s ease;
}
.paused-mid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.paused .pct {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.7);
}
.paused-actions {
  width: 100%;
  max-width: 480px;
  display: flex;
  justify-content: space-evenly;
  align-items: center;
}
.line-btn {
  font-size: 17px;
}
.line-btn.small {
  font-size: 14px;
  color: var(--w85);
}
.line-btn.small::after {
  width: 36px;
  background: rgba(255, 255, 255, 0.55);
}
.line-btn .sp {
  --ls: 0.45em;
}

/* ---------------------------------------------------------------- done */

.done {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: #000;
}
.done::before {
  content: "";
  position: absolute;
  inset: 0;
  background: #fff;
  opacity: 0.1;
  animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse {
  50% { opacity: 0.6; }
}
.done-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 24px;
}
.end {
  margin: 0 0 12px;
  font-size: clamp(64px, 16vw, 120px);
  font-weight: 300;
}
.end.sp {
  --ls: 0.16em;
}
.done .sub {
  margin: 0 0 64px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.8);
}

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

/* ------------------------------------------------------ settings sheet */

.sheet {
  width: 100%;
  max-width: 520px;
  margin: auto auto 0;
  padding: 0;
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px 16px 0 0;
  background: #000;
  color: var(--white);
}
.sheet[open] {
  animation: sheet-up 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.sheet::backdrop {
  background: rgba(0, 0, 0, 0.85);
}
@keyframes sheet-up {
  from { transform: translateY(40px); opacity: 0; }
}
.sheet-body {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 20px;
  padding: 32px 24px calc(24px + var(--safe-b));
}
.sheet-title {
  margin: 0 0 4px;
  text-align: center;
  font-size: 12px;
  font-weight: 300;
  color: var(--w85);
}
.slider {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.slider .row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.slider .name {
  font-size: 9px;
  color: rgba(255, 255, 255, 0.55);
}
.slider .name.sp {
  --ls: 0.3em;
}
.slider output {
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 28px;
  margin: 0;
  background: transparent;
  cursor: pointer;
  --pct: 50%;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: linear-gradient(90deg, var(--w85) var(--pct), rgba(255, 255, 255, 0.2) var(--pct));
}
input[type="range"]::-moz-range-track {
  height: 2px;
  background: rgba(255, 255, 255, 0.2);
}
input[type="range"]::-moz-range-progress {
  height: 2px;
  background: var(--w85);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin-top: -8px;
  border-radius: 50%;
  background: #fff;
  border: 0;
}
input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 0;
}
.level {
  display: flex;
  justify-content: center;
}
.done-btn {
  align-self: center;
  margin-top: 8px;
  font-size: 12px;
}

/* ---------------------------------------------------------------- toast */

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(28px + var(--safe-b));
  transform: translate(-50%, 12px);
  max-width: calc(100% - 32px);
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(20, 20, 20, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--w95);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 10;
}
.toast.on {
  opacity: 1;
  transform: translate(-50%, 0);
}

.noscript {
  position: fixed;
  inset: auto 0 24px;
  text-align: center;
  color: var(--w75);
  font-size: 13px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .done::before {
    opacity: 0.3;
  }
}