/* Cɛnɛ — Sahel sunset. Duun sentences: Charis SIL; French UI: Jost. */

:root {
  --dusk: #3a1f17;
  --dusk-deep: #241b14;
  --ember: #7a3b20;
  --flame: #c06b2e;
  --gold: #d9a441;
  --gold-soft: #f0c868;
  --cream: #f6ecd9;
  --cream-dim: #d9c6a8;
  --sky-progress: 0;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

[hidden] { display: none !important; }

html { height: 100%; }

body {
  min-height: 100dvh;
  background: linear-gradient(180deg, #2a1512 0%, var(--dusk) 30%, #5c2c1a 62%, #8a4423 82%, var(--dusk-deep) 82.2%, #1c150e 100%);
  color: var(--cream);
  font-family: "Jost", system-ui, sans-serif;
  padding-bottom: 54px;
  overflow-x: hidden;
}

[lang^="dux"] { font-family: "Charis SIL", serif; }

/* ---------- sky ---------- */

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

#sun {
  position: absolute;
  left: 50%;
  top: calc(30% - var(--sky-progress) * 12%);
  width: 210px;
  height: 210px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, var(--gold-soft) 0%, rgba(217, 164, 65, 0.75) 30%, rgba(217, 164, 65, 0.28) 52%, transparent 70%);
  filter: blur(10px);
  opacity: 0.65;
  transition: top 0.8s ease;
}

#horizon {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 15%;
  width: 100%;
  height: 70px;
  opacity: 0.9;
}

/* ---------- header ---------- */

#top {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: max(16px, env(safe-area-inset-top)) 18px 8px;
}

#top h1 {
  font-size: 1.9rem;
  color: var(--gold-soft);
  font-weight: 400;
  text-shadow: 0 2px 24px rgba(217, 164, 65, 0.4);
}

#top h1 .sub {
  display: block;
  font-family: "Jost", sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cream-dim);
}

#back-btn {
  width: 44px;
  height: 44px;
  border: 1.5px solid rgba(246, 236, 217, 0.35);
  border-radius: 50%;
  background: rgba(36, 27, 20, 0.45);
  color: var(--cream);
  font-size: 1.3rem;
  line-height: 1;
}

#net-badge {
  margin-left: auto;
  border: 1.5px solid var(--gold);
  color: var(--gold-soft);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

/* ---------- deck list ---------- */

#view { position: relative; z-index: 5; padding: 10px 18px 76px; max-width: 560px; margin: 0 auto; }

.intro {
  text-align: center;
  color: var(--cream-dim);
  font-weight: 500;
  margin: 4px 0 16px;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.deck-list { display: flex; flex-direction: column; gap: 11px; }

.deck-card {
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid rgba(217, 164, 65, 0.35);
  border-radius: 18px;
  background: linear-gradient(120deg, rgba(36, 27, 20, 0.82), rgba(58, 31, 23, 0.65));
  color: var(--cream);
  padding: 15px 18px;
  font-family: inherit;
  text-align: left;
  transition: transform 0.2s, border-color 0.2s;
  animation: rise 0.45s ease both;
  animation-delay: calc(var(--i) * 55ms);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}

@keyframes rise { from { opacity: 0; transform: translateY(16px); } }

.deck-card:active { transform: scale(0.97); }

.deck-card .num {
  font-family: "Charis SIL", serif;
  font-size: 1.6rem;
  color: var(--gold);
  min-width: 34px;
  text-align: center;
}

.deck-card .t { font-size: 1.12rem; font-weight: 600; letter-spacing: 0.02em; }
.deck-card .n { display: block; font-size: 0.8rem; color: var(--cream-dim); font-weight: 500; }
.deck-card .arrow { margin-left: auto; color: var(--gold); font-size: 1.2rem; }

/* ---------- card stage ---------- */

.stage { display: flex; flex-direction: column; min-height: calc(100dvh - 210px); }

.deck-title {
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-soft);
  margin-bottom: 8px;
}

.phrase-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  border-radius: 26px;
  border: 1px solid rgba(217, 164, 65, 0.4);
  background: linear-gradient(165deg, rgba(36, 27, 20, 0.88), rgba(58, 31, 23, 0.78));
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  padding: 30px 22px 26px;
  animation: card-in 0.35s ease both;
}

@keyframes card-in { from { opacity: 0; transform: translateX(50px) scale(0.96); } }

.phrase-card.back-dir { animation: card-in-back 0.35s ease both; }

@keyframes card-in-back { from { opacity: 0; transform: translateX(-50px) scale(0.96); } }

.phrase-duun {
  font-size: clamp(1.7rem, 7.4vw, 2.5rem);
  line-height: 1.35;
  color: var(--cream);
  font-weight: 700;
  overflow-wrap: break-word;
}

.phrase-word {
  margin-top: 10px;
  font-size: 0.86rem;
  color: var(--cream-dim);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.phrase-word b { font-family: "Charis SIL", serif; color: var(--gold-soft); font-weight: 400; font-size: 1rem; }

.phrase-fr {
  margin-top: 18px;
  font-size: 1.08rem;
  color: var(--cream-dim);
  font-weight: 500;
  line-height: 1.5;
  transition: filter 0.3s, opacity 0.3s;
}

.phrase-fr.masked { filter: blur(9px); opacity: 0.6; }

.reveal-hint { font-size: 0.75rem; color: var(--gold); font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; margin-top: 6px; }

.play-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 26px;
}

.play-main {
  width: 76px;
  height: 76px;
  border: 0;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, var(--gold-soft), var(--gold) 60%, var(--flame));
  color: #241b14;
  box-shadow: 0 8px 26px rgba(217, 164, 65, 0.45);
  display: grid;
  place-items: center;
  transition: transform 0.18s;
  position: relative;
}

.play-main:active { transform: scale(0.9); }
.play-main svg { width: 30px; height: 30px; }

.play-main.playing::before,
.play-main.playing::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--gold);
  animation: ripple 1.4s ease-out infinite;
}

.play-main.playing::after { animation-delay: 0.7s; }

@keyframes ripple {
  from { transform: scale(1); opacity: 0.8; }
  to { transform: scale(1.8); opacity: 0; }
}

.play-slow {
  width: 56px;
  height: 56px;
  border: 1.6px solid rgba(246, 236, 217, 0.5);
  border-radius: 50%;
  background: rgba(36, 27, 20, 0.5);
  color: var(--cream);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-family: inherit;
  transition: transform 0.18s;
}

.play-slow:active { transform: scale(0.9); }

/* pager */
.card-pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
}

.card-pager .nav {
  width: 58px;
  height: 58px;
  border: 1.5px solid rgba(217, 164, 65, 0.5);
  border-radius: 50%;
  background: rgba(36, 27, 20, 0.55);
  color: var(--gold-soft);
  display: grid;
  place-items: center;
  transition: transform 0.15s;
}

.card-pager .nav:active { transform: scale(0.88); }
.card-pager .nav:disabled { opacity: 0.3; }
.card-pager .nav svg { width: 24px; height: 24px; }

.dots { display: flex; gap: 5px; justify-content: center; flex-wrap: wrap; max-width: 55%; }

.dot { width: 7px; height: 7px; border-radius: 50%; background: rgba(246, 236, 217, 0.25); }
.dot.on { background: var(--gold); }

.mask-toggle {
  margin: 14px auto 0;
  display: block;
  border: 1.5px solid rgba(246, 236, 217, 0.4);
  background: transparent;
  color: var(--cream-dim);
  border-radius: 999px;
  padding: 9px 20px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.mask-toggle.on { border-color: var(--gold); color: var(--gold-soft); }

/* ---------- footer ---------- */

#foot {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 6;
  display: flex;
  justify-content: space-between;
  padding: 9px 18px calc(9px + env(safe-area-inset-bottom));
  background: rgba(28, 21, 14, 0.92);
  border-top: 1px solid rgba(217, 164, 65, 0.25);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--cream-dim);
}

#foot a { color: var(--gold); text-decoration: none; }

button { cursor: pointer; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}