/* ============================================================
   Birthday Surprise — theme, layout, animations
   Change the palette by editing the custom properties below.
   ============================================================ */

:root {
  --c-bg-1: #150826;
  --c-bg-2: #2d1444;
  --c-accent: #6b3a6e;
  --c-gold: #e0b45c;
  --c-ink: #f7f3fb;
  --c-muted: rgba(247, 243, 251, 0.88);
  --c-glass: rgba(16, 7, 34, 0.55);
  --c-glass-brd: rgba(255, 255, 255, 0.16);
  --c-scrim: rgba(10, 4, 22, 0.45);

  --font-display: "Playfair Display", Georgia, serif;
  --font-script: "Pacifico", cursive;
  --font-body: "Poppins", "Inter", system-ui, sans-serif;

  --radius: 20px;
  --shadow: 0 20px 60px rgba(20, 5, 45, 0.45);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: var(--font-body);
  color: var(--c-ink);
  background: var(--c-bg-1);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- Background ---------- */

.bg { position: fixed; inset: 0; z-index: 0; overflow: hidden; }

.bg__gradient {
  position: absolute;
  inset: -40%;
  background: linear-gradient(120deg, var(--c-bg-1), var(--c-accent), var(--c-bg-2), var(--c-bg-1));
  background-size: 300% 300%;
  animation: drift 22s var(--ease) infinite alternate;
}

.bg__gradient::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(224, 180, 92, 0.12), transparent 55%),
    linear-gradient(180deg, rgba(10, 4, 22, 0.35), rgba(10, 4, 22, 0.6));
}

@keyframes drift {
  0%   { background-position: 0% 20%; }
  50%  { background-position: 80% 60%; }
  100% { background-position: 20% 100%; }
}

.bg__bokeh { position: absolute; inset: 0; }

.bokeh {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.05));
  opacity: 0.16;
  animation: float-up linear infinite;
  will-change: transform;
}

@keyframes float-up {
  from { transform: translate3d(0, 110vh, 0) scale(1); }
  to   { transform: translate3d(var(--dx, 20px), -20vh, 0) scale(1.25); }
}

#confetti {
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
}

/* ---------- Premium atmosphere ---------- */

.vignette {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: radial-gradient(ellipse at 50% 42%, transparent 46%, rgba(8, 3, 18, 0.55) 100%);
}

.grain {
  position: fixed;
  inset: -12%;
  z-index: 50;
  pointer-events: none;
  opacity: 0.055;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  animation: grainShift 0.9s steps(2) infinite;
}

@keyframes grainShift {
  0%   { transform: translate(0, 0); }
  25%  { transform: translate(-2%, 1.5%); }
  50%  { transform: translate(1.5%, -2%); }
  75%  { transform: translate(-1%, -1%); }
  100% { transform: translate(0, 0); }
}

.glow {
  position: fixed;
  left: 0; top: 0;
  z-index: 1;
  width: 440px; height: 440px;
  margin: -220px 0 0 -220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(224, 180, 92, 0.14), rgba(232, 160, 191, 0.06) 45%, transparent 68%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s;
  will-change: transform;
}

.glow.is-on { opacity: 1; }

.sound-btn {
  position: fixed;
  top: max(14px, env(safe-area-inset-top));
  right: 14px;
  z-index: 31;
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1px solid var(--c-glass-brd);
  background: var(--c-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--c-ink);
  font-size: 1rem;
  cursor: pointer;
  transition: opacity 0.25s, transform 0.25s var(--ease);
}

.sound-btn:active { transform: scale(0.92); }

.sound-btn.is-off { opacity: 0.45; text-decoration: line-through; }

/* Editorial chapter index */
.scene::after { content: none; }

/* ---------- HUD / progress ---------- */

.hud {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 30;
  padding: max(14px, env(safe-area-inset-top)) 20px 10px;
  display: grid;
  gap: 10px;
  justify-items: center;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  background: linear-gradient(rgba(20, 5, 45, 0.35), transparent);
}

.hud[hidden],
.nav[hidden] { display: none !important; }

.progress {
  width: min(320px, 70vw);
  height: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  overflow: hidden;
}

.progress__fill {
  height: 100%;
  width: 16.66%;
  border-radius: inherit;
  background: linear-gradient(90deg, #b76e91, var(--c-gold), #fff8e7, var(--c-gold));
  background-size: 200% 100%;
  animation: shimmer 3s linear infinite;
  box-shadow: 0 0 14px rgba(224, 180, 92, 0.55);
  transition: width 0.6s var(--ease);
}

.dots { display: flex; gap: 8px; }

.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  border: 0;
  padding: 0;
  background: rgba(255, 255, 255, 0.28);
  cursor: pointer;
  transition: transform 0.3s var(--ease), background 0.3s;
}

.dot[aria-current="true"] {
  background: var(--c-gold);
  transform: scale(1.45);
}

/* ---------- Stage & scenes ---------- */

.stage { position: relative; z-index: 10; height: 100dvh; }

.scene {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 88px 20px 96px;
  opacity: 0;
  visibility: hidden;
  transform: translate3d(0, 28px, 0) scale(0.98);
  filter: blur(10px);
  transition:
    opacity 0.6s var(--ease),
    transform 0.6s var(--ease),
    filter 0.6s var(--ease),
    visibility 0s linear 0.6s;
}

.scene.is-active {
  opacity: 1;
  visibility: visible;
  transform: none;
  filter: none;
  transition:
    opacity 0.7s var(--ease),
    transform 0.7s var(--ease),
    filter 0.7s var(--ease);
}

.scene.is-leaving {
  transform: translate3d(0, -24px, 0) scale(0.98);
}

/* Staggered entrance for children */
.scene [data-anim] {
  opacity: 0;
  transform: translate3d(0, 16px, 0);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

.scene.is-active [data-anim] {
  opacity: 1;
  transform: none;
}

.scene.is-active [data-anim]:nth-child(1) { transition-delay: 0.10s; }
.scene.is-active [data-anim]:nth-child(2) { transition-delay: 0.22s; }
.scene.is-active [data-anim]:nth-child(3) { transition-delay: 0.34s; }
.scene.is-active [data-anim]:nth-child(4) { transition-delay: 0.46s; }
.scene.is-active [data-anim]:nth-child(5) { transition-delay: 0.58s; }

/* ---------- Cards / typography ---------- */

.glass {
  background: var(--c-glass);
  border: 1px solid var(--c-glass-brd);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
}

.card {
  width: min(560px, 100%);
  padding: clamp(28px, 6vw, 48px);
  text-align: center;
}

.eyebrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 14px;
}

.eyebrow::before,
.eyebrow::after {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-gold));
}

.eyebrow::after { transform: scaleX(-1); }

.card--note .eyebrow { justify-content: flex-start; }
.card--note .eyebrow::before { display: none; }

.title {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 7vw, 3.4rem);
  line-height: 1.12;
  margin-bottom: 16px;
}

.grad {
  background: linear-gradient(100deg, #fff, var(--c-gold), #f8e3b6, #fff);
  background-size: 220% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shimmer 4s linear infinite;
}

@keyframes shimmer {
  to { background-position: 220% center; }
}

.sub {
  color: var(--c-muted);
  font-weight: 300;
  line-height: 1.65;
  margin-bottom: 26px;
}

/* ---------- Buttons ---------- */

.btn {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--c-ink);
  border: 1px solid var(--c-glass-brd);
  border-radius: 999px;
  padding: 13px 28px;
  cursor: pointer;
  background: var(--c-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform 0.25s var(--ease), box-shadow 0.25s, background 0.25s;
  -webkit-tap-highlight-color: transparent;
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(0.98); }

.btn--primary {
  position: relative;
  overflow: hidden;
  background: linear-gradient(100deg, #f0d49a, var(--c-gold));
  border-color: transparent;
  color: #1d0f33;
  box-shadow: 0 10px 30px rgba(224, 180, 92, 0.35);
}

.btn--primary::after {
  content: "";
  position: absolute;
  top: 0; left: -85%;
  width: 45%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.55), transparent);
  transform: skewX(-20deg);
  transition: left 0.65s var(--ease);
}

.btn--primary:hover::after { left: 135%; }

.btn--ghost { min-width: 48px; min-height: 48px; padding: 10px 18px; }

.btn:disabled { opacity: 0.35; cursor: not-allowed; transform: none; }

/* ---------- Bottom nav ---------- */

.nav {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px max(16px, env(safe-area-inset-bottom));
}

/* ---------- Name scene ---------- */

.name {
  font-family: var(--font-script);
  font-size: clamp(2.6rem, 11vw, 4.6rem);
  line-height: 1.25;
  min-height: 1.2em;
  margin: 8px 0 18px;
}

.name__ch {
  display: inline-block;
  background: linear-gradient(100deg, #fff, var(--c-gold), #fff8e7, #fff);
  background-size: 280% auto;
  background-position: calc(var(--i, 0) * 10%) center;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation:
    chIn 0.75s var(--ease) both,
    shimmerCh 3.4s linear infinite;
}

@keyframes chIn {
  from { opacity: 0; transform: translateY(0.35em) scale(0.92); filter: blur(8px); }
  to   { opacity: 1; transform: none; filter: blur(0); }
}

@keyframes shimmerCh {
  to { background-position: calc(var(--i, 0) * 10% + 280%) center; }
}

/* ---------- Gallery (Instagram-story style) ---------- */

.gallery {
  width: min(400px, 93vw);
  text-align: center;
}

.story {
  --slide-ms: 4200ms;
  position: relative;
  margin: 14px 0 12px;
  border-radius: 18px;
  overflow: hidden;
  border: 2px solid transparent;
  background-image: linear-gradient(#0c0618, #0c0618), linear-gradient(135deg, var(--c-gold), #e8a0bf, var(--c-gold));
  background-origin: border-box;
  background-clip: padding-box, border-box;
  box-shadow: var(--shadow), 0 0 24px rgba(224, 180, 92, 0.18);
  text-align: left;
}

.story__bars {
  position: absolute;
  top: 8px; left: 8px; right: 8px;
  z-index: 5;
  display: flex;
  gap: 4px;
}

.story__bar {
  flex: 1;
  height: 2.5px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.3);
  overflow: hidden;
}

.story__bar i {
  display: block;
  height: 100%;
  width: 0;
  background: #fff;
  border-radius: inherit;
}

.story__bar.is-done i { width: 100%; }

.story__bar.is-active i {
  animation: fillbar var(--slide-ms) linear forwards;
}

.story.is-paused .story__bar.is-active i { animation-play-state: paused; }

@keyframes fillbar { to { width: 100%; } }

.story__head {
  position: absolute;
  top: 18px; left: 10px; right: 10px;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 2px;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.6);
}

.story__avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: #1d0f33;
  background: linear-gradient(135deg, var(--c-gold), #f0d49a);
  border: 2px solid rgba(255, 255, 255, 0.85);
  flex-shrink: 0;
}

.story__user {
  font-size: 0.86rem;
  font-weight: 500;
  color: #fff;
}

.story__time {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.7);
}

.story__media {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 5;
  max-height: min(62vh, 560px);
  background: #140a26;
}

.story__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  transition: opacity 0.45s var(--ease);
}

.story__media img.is-current { opacity: 1; }

.story__scrim {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 36%;
  z-index: 2;
  background: linear-gradient(180deg, rgba(8, 3, 18, 0.75), rgba(8, 3, 18, 0.35) 55%, transparent);
  pointer-events: none;
}

.story__tap {
  position: absolute;
  top: 0; bottom: 0;
  z-index: 4;
  width: 32%;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
}

button {
  -webkit-tap-highlight-color: transparent;
}

.story__tap--left { left: 0; }
.story__tap--right { right: 0; width: 68%; }

.story__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px 14px;
}

.story__caption {
  font-size: 0.88rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.92);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- Message note ---------- */

.card--note {
  text-align: left;
  position: relative;
  padding-top: clamp(48px, 10vw, 64px);
}

.card--note::before {
  content: "\201C";
  position: absolute;
  top: 2px; left: 22px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 5.2rem;
  line-height: 1;
  color: rgba(224, 180, 92, 0.4);
  pointer-events: none;
}

.note {
  border-top: 1px solid rgba(224, 180, 92, 0.28);
  padding-top: 18px;
}

.note p {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(1.1rem, 4.2vw, 1.45rem);
  line-height: 1.8;
  color: #fff;
  opacity: 0;
  transform: translate3d(0, 12px, 0);
  filter: blur(6px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease), filter 0.7s var(--ease);
  margin-bottom: 0.45em;
}

.scene.is-active .note p.is-shown {
  opacity: 1;
  transform: none;
  filter: blur(0);
}

/* ---------- Countdown ---------- */

.count { text-align: center; }

.count__rings {
  position: relative;
  display: grid;
  place-items: center;
  width: clamp(180px, 48vw, 300px);
  aspect-ratio: 1;
  margin: 6px auto 0;
}

.count__rings::before,
.count__rings::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(224, 180, 92, 0.4);
  animation: ringPulse 2.2s ease-out infinite;
}

.count__rings::after { animation-delay: 1.1s; }

@keyframes ringPulse {
  from { transform: scale(0.72); opacity: 0.9; }
  to   { transform: scale(1.15); opacity: 0; }
}

.count__number {
  font-family: var(--font-display);
  font-size: clamp(6rem, 28vw, 12rem);
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(180deg, #fff, var(--c-gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 12px 40px rgba(245, 197, 107, 0.4));
}

.count__number.is-pop { animation: pop 0.9s var(--ease); }

@keyframes pop {
  0%   { transform: scale(0.4); filter: blur(14px) drop-shadow(0 0 0 transparent); opacity: 0; }
  45%  { transform: scale(1.12); filter: blur(0) drop-shadow(0 12px 40px rgba(245, 197, 107, 0.5)); opacity: 1; }
  100% { transform: scale(1); filter: blur(0) drop-shadow(0 12px 40px rgba(245, 197, 107, 0.4)); opacity: 1; }
}

/* ---------- Finale ---------- */

.scene--finale { overflow: hidden; }

.rays {
  position: absolute;
  inset: -50%;
  z-index: 0;
  pointer-events: none;
  background: repeating-conic-gradient(
    from 0deg at 50% 50%,
    rgba(224, 180, 92, 0.1) 0deg 5deg,
    transparent 5deg 16deg
  );
  -webkit-mask-image: radial-gradient(circle at 50% 46%, #000 8%, transparent 52%);
  mask-image: radial-gradient(circle at 50% 46%, #000 8%, transparent 52%);
  animation: spinSlow 90s linear infinite;
  opacity: 0.7;
}

@keyframes spinSlow { to { transform: rotate(360deg); } }

.finale {
  position: relative;
  z-index: 1;
  text-align: center;
}

.finale__title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 7vw, 3rem);
  letter-spacing: 0.06em;
  margin: 20px 0 4px;
  color: var(--c-muted);
}

.finale__name {
  font-family: var(--font-script);
  font-size: clamp(2.9rem, 13vw, 5rem);
  line-height: 1.2;
  margin-bottom: 14px;
}

.finale__actions { display: flex; justify-content: center; gap: 12px; margin-top: 26px; }

/* Cake (inline SVG) */
.cake {
  display: block;
  width: min(132px, 34vw);
  height: auto;
  margin: 0 auto;
  animation: bob 2.6s ease-in-out infinite;
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

.cake-flame {
  transform-box: fill-box;
  transform-origin: 50% 100%;
  animation: flicker 0.35s ease-in-out infinite alternate;
}

@keyframes flicker {
  from { transform: scale(1) rotate(-4deg); }
  to   { transform: scale(1.12) rotate(5deg); }
}

/* ---------- Ask / anonymous form ---------- */

.card--ask {
  text-align: left;
  width: min(520px, 100%);
  padding: clamp(22px, 5vw, 36px);
}

.ask__banner {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(0.95rem, 3.6vw, 1.15rem);
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: uppercase;
  line-height: 1.45;
  color: var(--c-gold);
  background: rgba(224, 180, 92, 0.1);
  border: 1px dashed rgba(224, 180, 92, 0.55);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 18px;
}

.ask {
  display: grid;
  gap: 14px;
}

.ask__field { display: grid; gap: 6px; }

.ask__q {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--c-muted);
  line-height: 1.4;
}

.ask__input {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--c-ink);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--c-glass-brd);
  border-radius: 12px;
  padding: 11px 14px;
  width: 100%;
  transition: border-color 0.25s, background 0.25s;
}

.ask__input::placeholder { color: rgba(247, 243, 251, 0.35); }

.ask__input:hover { background: rgba(255, 255, 255, 0.09); }

.ask__input:focus {
  outline: none;
  border-color: rgba(224, 180, 92, 0.7);
  background: rgba(255, 255, 255, 0.1);
}

.ask__input--area { resize: vertical; min-height: 84px; line-height: 1.5; }

.ask__input[aria-invalid="true"] { border-color: #f87171; }

.ask__error {
  font-size: 0.84rem;
  color: #fca5a5;
  line-height: 1.4;
}

.ask .btn--primary { justify-self: center; margin-top: 4px; }

.ask__done { text-align: center; padding: 12px 0 4px; }

.ask__done-title {
  font-family: var(--font-script);
  font-size: clamp(2rem, 8vw, 2.8rem);
  color: var(--c-gold);
  margin-bottom: 10px;
}

.ask__done .sub { margin-bottom: 18px; }

/* datetime-local: keep the dark theme readable in WebKit/Blink */
.ask__input[type="datetime-local"]::-webkit-calendar-picker-indicator {
  filter: invert(0.85);
  cursor: pointer;
  opacity: 0.75;
}

.ask__input[type="datetime-local"]::-webkit-calendar-picker-indicator:hover { opacity: 1; }

/* ---------- Responsive ---------- */

@media (min-width: 720px) {
  .scene { padding: 100px 40px 110px; }
  .nav { padding-left: 40px; padding-right: 40px; }
}

/* Short phones (landscape or small height) */
@media (max-height: 680px) {
  .scene { padding: 76px 18px 84px; }
  .card { padding: 22px clamp(18px, 5vw, 32px); }
  .story__media { max-height: 46vh; }
  .title { font-size: clamp(1.8rem, 6vw, 2.6rem); }
  .name { font-size: clamp(2.2rem, 9vw, 3.4rem); }
  .count__number { font-size: clamp(4.5rem, 22vw, 8rem); }
}

/* Very narrow phones */
@media (max-width: 360px) {
  .btn { padding: 12px 20px; font-size: 0.88rem; }
  .gallery { width: 96vw; }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .scene { filter: none; transform: none; }
  .bokeh { display: none; }
}