:root {
  --papyrus: #d9bc84;
  --papyrus-dark: #b8965a;
  --ochre: #c8903b;
  --gold: #e3b23c;
  --egypt-black: #201812;
  --rust: #9e3b25;
  --turquoise: #2b8c8c;
  --lapis: #1f4e8c;
  --text: #241a10;
  --muted: #6b543a;
  --glass: rgba(217, 188, 132, 0.82);
  --border: rgba(32, 24, 18, 0.55);
}

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

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--egypt-black);
  color: var(--text);
  font-family: 'Vazirmatn', sans-serif;
  -webkit-font-smoothing: antialiased;
}

#scene {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
}

/* ---------- UI overlay ---------- */
#ui {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: clamp(1rem, 4vh, 2.5rem) 1rem;
}

/* header */
#app-header {
  text-align: center;
  animation: fadeDown 1.6s ease both;
}
.title {
  font-weight: 900;
  font-size: clamp(2.4rem, 8vw, 4rem);
  letter-spacing: 0.08em;
  color: var(--gold);
  text-shadow: 0 2px 0 var(--egypt-black), 0 0 24px rgba(227, 178, 60, 0.5);
}
.subtitle {
  font-weight: 500;
  font-size: clamp(0.75rem, 2.4vw, 0.95rem);
  color: var(--papyrus);
  letter-spacing: 0.25em;
  margin-top: 0.35rem;
  text-shadow: 0 1px 0 var(--egypt-black);
}

/* center block — carved papyrus panel with hieroglyphic border */
#center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  pointer-events: auto;
  background:
    repeating-linear-gradient(0deg, rgba(184,150,90,0.14) 0 3px, transparent 3px 7px),
    var(--glass);
  border: 3px solid var(--egypt-black);
  border-radius: 6px;
  padding: clamp(1.2rem, 4vw, 2rem) clamp(1.5rem, 6vw, 3rem);
  box-shadow:
    0 0 0 2px var(--gold),
    0 0 0 6px var(--egypt-black),
    0 20px 50px rgba(0,0,0,0.55);
  position: relative;
  animation: fadeUp 1.8s ease both;
}
/* hieroglyphic corner glyphs */
#center::before, #center::after {
  content: '𓂀 𓆓 𓇳 𓋹';
  position: absolute;
  left: 0; right: 0;
  text-align: center;
  font-size: 0.9rem;
  color: var(--egypt-black);
  letter-spacing: 0.3em;
  opacity: 0.7;
}
#center::before { top: -1.4rem; }
#center::after { bottom: -1.4rem; }

#cycles {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.05em;
}

#timer {
  font-weight: 900;
  font-size: clamp(3.6rem, 15vw, 6.5rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--rust);
  text-shadow: 0 2px 0 var(--gold), 0 0 30px rgba(158, 59, 37, 0.4);
  font-variant-numeric: tabular-nums;
}

/* progress bar — carved channel */
#progress-track {
  width: min(70vw, 320px);
  height: 8px;
  background: var(--egypt-black);
  border-radius: 2px;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.4);
}
#progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--rust), var(--gold), var(--turquoise));
  transition: width 0.6s linear;
}

/* presets */
#presets {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.2rem;
}
.preset {
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  background: rgba(200, 144, 59, 0.25);
  border: 2px solid var(--egypt-black);
  border-radius: 3px;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  transition: all 0.25s ease;
}
.preset:hover { background: rgba(200, 144, 59, 0.5); }
.preset.active {
  color: var(--papyrus);
  background: var(--turquoise);
  border-color: var(--egypt-black);
  box-shadow: inset 0 0 0 1px var(--gold);
  font-weight: 700;
}

/* controls */
#controls {
  display: flex;
  gap: 0.7rem;
  margin-top: 0.3rem;
}
.ctrl {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  background: var(--papyrus);
  border: 2px solid var(--egypt-black);
  border-radius: 3px;
  padding: 0.6rem 1.5rem;
  cursor: pointer;
  transition: all 0.25s ease;
  letter-spacing: 0.04em;
  box-shadow: 0 3px 0 rgba(0,0,0,0.3);
}
.ctrl:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 0 rgba(0,0,0,0.3);
}
.ctrl:active:not(:disabled) {
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.3);
}
.ctrl.primary {
  color: var(--papyrus);
  background: var(--rust);
  border-color: var(--egypt-black);
  box-shadow: 0 3px 0 rgba(0,0,0,0.4), inset 0 0 0 1px var(--gold);
}
.ctrl.primary:hover:not(:disabled) { background: #b8492e; }
.ctrl:disabled { opacity: 0.4; cursor: default; box-shadow: none; }

.ghost {
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--muted);
  background: transparent;
  border: none;
  cursor: pointer;
  letter-spacing: 0.08em;
  transition: color 0.3s ease;
  margin-top: 0.1rem;
}
.ghost:hover { color: var(--rust); }
.ghost.on { color: var(--turquoise); }

/* quote box — inscription on papyrus */
#quote-box {
  text-align: center;
  max-width: min(90vw, 640px);
  padding: 0.7rem 1.4rem;
  background: rgba(217, 188, 132, 0.55);
  border-top: 2px solid var(--egypt-black);
  border-bottom: 2px solid var(--egypt-black);
  transition: opacity 0.9s ease, transform 0.9s ease;
  animation: fadeIn 2.4s ease both;
}
#quote-box.fading { opacity: 0; transform: translateY(8px); }
#quote-box.highlight { animation: quoteGlow 2.4s ease; }
@keyframes quoteGlow {
  0% { box-shadow: 0 0 0 rgba(227,178,60,0); }
  30% { box-shadow: 0 0 30px rgba(227,178,60,0.7); background: rgba(227,178,60,0.35); }
  100% { box-shadow: 0 0 0 rgba(227,178,60,0); }
}
#quote-text {
  font-weight: 500;
  font-size: clamp(1rem, 3.4vw, 1.35rem);
  line-height: 1.9;
  color: var(--egypt-black);
}
#quote-author {
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--rust);
  margin-top: 0.5rem;
  letter-spacing: 0.1em;
}

/* footer */
#footer { pointer-events: auto; }
#footer a {
  color: var(--papyrus);
  text-decoration: none;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  transition: color 0.3s ease;
  direction: ltr;
  text-shadow: 0 1px 0 var(--egypt-black);
}
#footer a:hover { color: var(--gold); }

/* complete overlay */
#complete-overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1s ease;
  background: radial-gradient(circle at center, rgba(227,178,60,0.28), transparent 70%);
}
#complete-overlay.show { opacity: 1; }
#complete-text {
  font-weight: 700;
  font-size: clamp(1.3rem, 5vw, 2.2rem);
  color: var(--gold);
  text-shadow: 0 2px 0 var(--egypt-black), 0 0 40px rgba(227,178,60,0.8);
  padding: 1.5rem 2rem;
  text-align: center;
  animation: gentlePulse 3s ease infinite;
}

/* animations */
@keyframes fadeDown { from { opacity: 0; transform: translateY(-20px);} to { opacity: 1; transform: translateY(0);} }
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px);} to { opacity: 1; transform: translateY(0);} }
@keyframes fadeIn { from { opacity: 0;} to { opacity: 1;} }
@keyframes gentlePulse { 0%,100% { transform: scale(1); opacity: 0.9;} 50% { transform: scale(1.03); opacity: 1;} }

/* mobile tweaks */
@media (max-width: 520px) {
  #ui { justify-content: space-between; padding-top: 1.2rem; padding-bottom: 1.2rem; }
  #controls { flex-wrap: wrap; justify-content: center; }
  .ctrl { padding: 0.55rem 1.1rem; font-size: 0.9rem; }
  #quote-box { display: none; }
}
@media (max-width: 520px) and (min-height: 700px) {
  #quote-box { display: block; }
}