/* ============================================================
   Snow Form — winter-night deck
   Design foundations from skills/apple-design:
   respond on press, size-specific type, translucent materials,
   restraint in color, reduced-motion / -transparency handled.
   ============================================================ */

:root {
  /* Winter-night palette */
  --bg-0: #060b18;
  --bg-1: #0a1428;
  --ink: #f3f7ff;
  --ink-dim: rgba(233, 240, 255, 0.62);
  --ink-faint: rgba(233, 240, 255, 0.38);
  --accent: #5fb0ff;
  --accent-warm: #ffd27a;
  --yes: #34d17a;
  --no: #ff6b6b;

  /* Glass */
  --glass: rgba(255, 255, 255, 0.08);
  --glass-strong: rgba(255, 255, 255, 0.14);
  --glass-brdr: rgba(255, 255, 255, 0.16);
  --glass-brdr-top: rgba(255, 255, 255, 0.34);

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);

  /* Space (rem-based so it scales with text size) */
  --pad: clamp(1.25rem, 5vw, 2.5rem);

  color-scheme: dark;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  font: 100%/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(120% 90% at 50% -10%, #1b3a6b 0%, var(--bg-1) 45%, var(--bg-0) 100%);
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  touch-action: manipulation;
}

/* ---------- Ambient canvases ---------- */
#snow,
#confetti {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}
#confetti {
  z-index: 60;
}

/* ---------- Stage / screens ---------- */
.stage {
  position: relative;
  z-index: 1;
  height: 100%;
  height: 100dvh;
  width: 100%;
}

.screen {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding:
    max(var(--pad), env(safe-area-inset-top))
    var(--pad)
    max(var(--pad), env(safe-area-inset-bottom));
  will-change: opacity, transform;
}
.screen[hidden] {
  display: none;
}

.screen__inner {
  width: min(560px, 100%);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.1rem;
}
.screen__inner--wide {
  width: min(680px, 100%);
}

/* ---------- Typography ---------- */
.q {
  font-size: clamp(2.75rem, 12vw, 5.5rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin: 0;
}
.q--sm {
  font-size: clamp(2rem, 8vw, 3.25rem);
  letter-spacing: -0.025em;
}
.decision__dates {
  margin: 0 0 -0.4rem;
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ---------- Intro ---------- */
.screen--intro .screen__inner {
  cursor: pointer;
  gap: 0.85rem;
}
.intro__glyph {
  color: var(--accent);
  display: grid;
  place-items: center;
  width: 92px;
  height: 92px;
  margin-bottom: 0.5rem;
  border-radius: 50%;
  background: var(--glass);
  border: 1px solid var(--glass-brdr);
  border-top-color: var(--glass-brdr-top);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
}
.wave {
  opacity: 0;
  animation: wavepulse 2.4s ease-in-out infinite;
}
.wave--2 {
  animation-delay: 0.35s;
}
@keyframes wavepulse {
  0%, 100% { opacity: 0; }
  40%, 60% { opacity: 1; }
}
.intro__title {
  font-size: clamp(2.1rem, 8.5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  font-weight: 800;
  margin: 0;
}
.intro__sub {
  margin: 0;
  color: var(--ink-dim);
  font-size: 1.05rem;
}

/* ---------- Hints ---------- */
.hint {
  color: var(--ink-faint);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.hint--pulse {
  margin-top: 0.75rem;
  animation: breathe 2.6s var(--ease-out) infinite;
}
@keyframes breathe {
  0%, 100% { opacity: 0.35; transform: translateY(0); }
  50% { opacity: 0.8; transform: translateY(-2px); }
}
.hint--corner {
  position: absolute;
  bottom: max(1.4rem, env(safe-area-inset-bottom));
  left: 0;
  right: 0;
  text-align: center;
  opacity: 0.45;
}

/* ---------- Deck / slides ---------- */
.screen--deck {
  cursor: pointer;
  padding: 0;
}
.deck {
  position: relative;
  width: 100%;
  height: 100%;
}
.slide {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: var(--pad);
  text-align: center;
  will-change: transform, opacity;
}
.slide__text {
  font-size: clamp(2.5rem, 11vw, 5rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin: 0;
  max-width: 14ch;
  text-wrap: balance;
}
.slide__num {
  position: absolute;
  top: max(1.4rem, env(safe-area-inset-top));
  left: 0;
  right: 0;
  text-align: center;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
}
.deck__progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #a9d4ff);
  width: 0;
  border-radius: 0 3px 3px 0;
  box-shadow: 0 0 12px rgba(95, 176, 255, 0.6);
}

/* ---------- Buttons ---------- */
.btn {
  appearance: none;
  border: 1px solid var(--glass-brdr);
  border-top-color: var(--glass-brdr-top);
  background: var(--glass-strong);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  color: var(--ink);
  font: inherit;
  font-weight: 650;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  padding: 0.95rem 2.2rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 110ms var(--ease-out), background 160ms ease, box-shadow 160ms ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
  user-select: none;
}
.btn:active {
  transform: scale(0.96);
}
.btn--block {
  width: 100%;
}
.btn--primary {
  background: linear-gradient(180deg, #6bb6ff, var(--accent));
  border-color: rgba(255, 255, 255, 0.3);
  color: #05203f;
  font-weight: 750;
  box-shadow: 0 10px 30px rgba(95, 176, 255, 0.4);
}
.btn--primary:active {
  transform: scale(0.96);
}
a.btn {
  text-decoration: none;
  display: inline-block;
}

.decision__buttons {
  position: relative;
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
  min-height: 3.5rem;
  align-items: center;
  justify-content: center;
}
.btn--yes {
  background: linear-gradient(180deg, #4be08c, var(--yes));
  border-color: rgba(255, 255, 255, 0.28);
  color: #04331c;
  font-weight: 750;
  padding-inline: 2.8rem;
  box-shadow: 0 10px 30px rgba(52, 209, 122, 0.35);
}
.btn--no {
  will-change: transform;
  position: relative;
  z-index: 2;
}

/* ---------- Options list ---------- */
.options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  margin-top: 0.5rem;
}
.option {
  appearance: none;
  text-align: left;
  font: inherit;
  font-size: 1.1rem;
  font-weight: 550;
  color: var(--ink);
  padding: 1.05rem 1.3rem;
  border-radius: 16px;
  border: 1px solid var(--glass-brdr);
  border-top-color: var(--glass-brdr-top);
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  cursor: pointer;
  transition: transform 110ms var(--ease-out), background 160ms ease;
}
.option:active {
  transform: scale(0.98);
  background: var(--glass-strong);
}

/* ---------- Letter sheet ---------- */
.sheet__title {
  font-size: clamp(1.7rem, 6vw, 2.4rem);
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0;
}
.sheet__lead,
.confirm__lead {
  margin: 0;
  color: var(--ink-dim);
}
.letter {
  width: 100%;
  text-align: left;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--ink);
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid var(--glass-brdr);
  border-radius: 16px;
  padding: 1.2rem 1.3rem;
  max-height: 42dvh;
  overflow: auto;
  margin: 0;
}
.sheet__actions {
  display: flex;
  gap: 0.9rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

/* ---------- Back link ---------- */
.linkback {
  appearance: none;
  background: none;
  border: none;
  color: var(--ink-dim);
  font: inherit;
  font-size: 0.98rem;
  cursor: pointer;
  padding: 0.6rem 0.4rem;
  transition: color 160ms ease, transform 110ms var(--ease-out);
}
.linkback:active {
  transform: scale(0.97);
}
.linkback:hover {
  color: var(--ink);
}
.linkback--float {
  position: absolute;
  top: max(1rem, env(safe-area-inset-top));
  left: 1rem;
  background: var(--glass);
  border: 1px solid var(--glass-brdr);
  border-radius: 999px;
  padding: 0.55rem 1rem;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 3;
}

/* ---------- Video ---------- */
.screen--video,
.screen--celebrate {
  padding: var(--pad);
  gap: 1.2rem;
}
.video__frame {
  width: min(960px, 100%);
  aspect-ratio: 16 / 9;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--glass-brdr);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  background: #000;
}
.video__frame--tight {
  width: min(720px, 100%);
}
/* Per-clip orientation — set from the video's real dimensions at runtime.
   Vertical clips size by height so they stay a reasonable size, not full screen. */
.video__frame.is-vertical {
  width: auto;
  aspect-ratio: 9 / 16;
  height: min(72dvh, 640px);
  max-width: 100%;
}
/* On the "interesting"/"recap"/"wife" pages the vertical clip shares space with text + buttons. */
.screen--interesting .screen__inner,
.screen--recap .screen__inner,
.screen--wife .screen__inner {
  gap: 1rem;
  max-height: 100%;
}
.screen--interesting .video__frame.is-vertical,
.screen--recap .video__frame.is-vertical,
.screen--wife .video__frame.is-vertical {
  height: min(48dvh, 420px);
}
.recap__title {
  font-size: clamp(1.6rem, 6vw, 2.4rem);
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0;
}
.decision__buttons--static {
  margin-top: 0.5rem;
}
.video__el {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.screen--celebrate .screen__inner,
.screen--celebrate {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.celebrate__msg {
  font-size: clamp(1.4rem, 6vw, 2rem);
  font-weight: 750;
  letter-spacing: -0.02em;
  margin: 0;
}

/* ---------- Background-video screens ---------- */
.screen--confirm,
.screen--decision {
  overflow: hidden;
}
.screen__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
/* Dim to focus the content; keeps foreground text legible over changing frames. */
.screen__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(120% 80% at 50% 30%, rgba(6, 11, 24, 0.35), rgba(6, 11, 24, 0.72) 70%),
    linear-gradient(180deg, rgba(6, 11, 24, 0.5), rgba(6, 11, 24, 0.82));
}
.screen--confirm .screen__inner,
.screen--decision .screen__inner {
  position: relative;
  z-index: 2;
}

/* ---------- Celebrate ---------- */
.celebrate__glyph {
  font-size: clamp(3.5rem, 16vw, 6rem);
  line-height: 1;
  filter: drop-shadow(0 12px 30px rgba(0, 0, 0, 0.45));
  animation: floaty 3.2s var(--ease-out) infinite;
}
@keyframes floaty {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-10px) rotate(2deg); }
}
.celebrate__hint {
  margin: 0.4rem 0 0;
  color: var(--ink-dim);
  font-size: 0.95rem;
}
.celebrate__hint strong {
  color: var(--ink);
  font-weight: 650;
}

/* ---------- Form ---------- */
.confirm__form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-top: 0.4rem;
}
.field {
  width: 100%;
  font: inherit;
  font-size: 1.15rem;
  color: var(--ink);
  padding: 1rem 1.2rem;
  border-radius: 16px;
  border: 1px solid var(--glass-brdr);
  border-top-color: var(--glass-brdr-top);
  background: rgba(0, 0, 0, 0.25);
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}
.field::placeholder {
  color: var(--ink-faint);
}
.field:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(95, 176, 255, 0.22);
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .wave,
  .hint--pulse,
  .deck__progress,
  .celebrate__glyph {
    animation: none !important;
  }
  .btn,
  .option,
  .linkback,
  .field {
    transition: opacity 200ms ease !important;
  }
  .btn:active,
  .btn--primary:active,
  .option:active,
  .linkback:active {
    transform: none;
  }
}

/* ---------- Reduced transparency ---------- */
@media (prefers-reduced-transparency: reduce) {
  .btn,
  .option,
  .intro__glyph,
  .linkback--float,
  .field {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: #16233f;
  }
  .btn--primary { background: var(--accent); }
  .btn--yes { background: var(--yes); }
}

/* ---------- Contrast ---------- */
@media (prefers-contrast: more) {
  :root {
    --ink-dim: rgba(233, 240, 255, 0.85);
    --glass-brdr: rgba(255, 255, 255, 0.5);
  }
}