/* Room 3: The Water Room — iOS dark + Liquid Glass + mint accent */
:root {
  --bg-base: #000000;
  --glass-bg: rgba(28, 28, 32, 0.55);
  --glass-bg-strong: rgba(28, 28, 32, 0.78);
  --glass-border: rgba(255, 255, 255, 0.10);
  --glass-highlight: rgba(255, 255, 255, 0.06);

  --text-primary: #F8F5F0;
  --text-secondary: #A8A29A;
  --text-tertiary: #6E6A63;

  --accent: #7CD4B8;
  --accent-glow: rgba(124, 212, 184, 0.35);
  --accent-dim: rgba(124, 212, 184, 0.15);
  --water: rgba(79, 168, 232, 0.22);
  --water-strong: rgba(79, 168, 232, 0.45);
  --good: #7CD4B8;
  --error: #F08A7C;

  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(circle at 50% 100%, rgba(79, 168, 232, 0.10), transparent 55%),
    radial-gradient(circle at 0% 0%, rgba(124, 212, 184, 0.06), transparent 50%),
    var(--bg-base);
  color: var(--text-primary);
  font-family: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  font-size: 18px;
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.water-background {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 0%;
  z-index: 0;
  background: linear-gradient(to top, var(--water-strong), var(--water));
  transition: height 0.6s ease-out;
  pointer-events: none;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 -8px 30px rgba(79, 168, 232, 0.3);
}
.water-background::before {
  content: "";
  position: absolute;
  top: -2px; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: ripple 6s linear infinite;
}
@keyframes ripple {
  0%, 100% { transform: translateX(-30%); }
  50% { transform: translateX(30%); }
}

.top-nav {
  max-width: 760px;
  margin: 28px auto 22px;
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 2;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
}

.nav-link, .reset-btn {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--glass-border);
  padding: 8px 16px;
  font-family: inherit;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border-radius: 999px;
  transition: background 0.15s, border-color 0.15s;
}
.nav-link:hover, .reset-btn:hover { background: var(--accent-dim); border-color: var(--accent); }
.nav-link:focus-visible, .reset-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 18px 80px;
  position: relative;
  z-index: 1;
}

header {
  text-align: center;
  margin-bottom: 22px;
}
header::before {
  content: "Room 3 of 3 \00B7 Hidden cost";
  display: inline-block;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.72rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
header h1 {
  font-size: 2.6rem;
  margin: 0 0 8px 0;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.subtitle {
  color: var(--text-secondary);
  margin: 0 0 4px 0;
  font-style: italic;
  font-size: 1.1rem;
}
header::after {
  content: "By the end you will know hardware longevity is the lever almost no one uses.";
  display: block;
  margin-top: 8px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.water-level-info {
  margin: 16px auto 0;
  padding: 8px 16px;
  display: inline-flex;
  gap: 12px;
  align-items: center;
  font-family: ui-monospace, monospace;
  font-size: 0.88rem;
  color: var(--text-secondary);
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
}
#waterPercent { color: var(--accent); font-weight: 600; }

.lock-section {
  background: var(--glass-bg);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  box-shadow:
    inset 0 1px 0 0 var(--glass-highlight),
    0 12px 40px rgba(0, 0, 0, 0.55);
  padding: 26px 24px;
  margin-bottom: 18px;
}
.lock-section.locked {
  opacity: 0.5;
  pointer-events: none;
  filter: grayscale(0.4);
}
.lock-section.hidden { display: none; }

.lock-section h2 {
  margin: 0 0 14px 0;
  font-size: 1.4rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.3px;
}

.poem {
  font-style: italic;
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-primary);
  margin: 0 0 16px 0;
  padding: 16px 18px;
  background: rgba(0,0,0,0.25);
  border-left: 2px solid var(--accent);
  border-radius: 8px;
}

.blank {
  background: rgba(0,0,0,0.4);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: ui-monospace, monospace;
  font-size: 1rem;
  width: 80px;
  padding: 4px 8px;
  border-radius: 8px;
  text-align: center;
}
.blank:focus { outline: none; box-shadow: 0 0 0 3px var(--accent-dim); }

.hint {
  font-size: 0.88rem;
  color: var(--text-tertiary);
  font-style: italic;
  margin: 8px 0 12px 0;
  font-family: ui-monospace, monospace;
}

.check-btn {
  background: var(--accent);
  color: #00231C;
  border: none;
  padding: 11px 22px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}
.check-btn:hover { transform: translateY(-1px); background: #93E2C8; }

.skip-btn {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--glass-border);
  padding: 7px 14px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  margin-left: 6px;
}
.skip-btn:hover { color: var(--text-primary); border-color: var(--line-strong); }

.lock-status {
  margin-top: 12px;
  font-style: italic;
  font-size: 0.96rem;
  min-height: 1.4em;
}
.lock-status.success { color: var(--good); }
.lock-status.error { color: var(--error); }

.slider-container {
  display: flex;
  gap: 14px;
  align-items: center;
  margin: 12px 0;
}
#lifetimeSlider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 999px;
  outline: none;
}
#lifetimeSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 0 4px rgba(124, 212, 184, 0.2);
}
#lifetimeSlider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}
#sliderValue {
  font-family: ui-monospace, monospace;
  font-size: 1.2rem;
  color: var(--accent);
  font-weight: 600;
  min-width: 24px;
  text-align: right;
}
.carbon-display {
  margin: 10px 0;
  padding: 10px 14px;
  background: rgba(0,0,0,0.25);
  border-radius: 12px;
  font-family: ui-monospace, monospace;
  font-size: 0.95rem;
  color: var(--text-secondary);
}
#carbonMetric { color: var(--accent); }

.city-choice {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 14px 0;
}
.city-card {
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 16px 14px;
}
.city-card h3 {
  margin: 0 0 8px 0;
  font-size: 1.05rem;
  color: var(--accent);
  font-weight: 600;
}
.city-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.chips-container { margin: 14px 0; }
.chips-container > p {
  margin: 0 0 10px 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.chip {
  background: var(--glass-bg-strong);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 8px 14px;
  font-family: inherit;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.15s;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.chip.in-zone { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }

.reasoning-zone {
  min-height: 70px;
  padding: 14px;
  background: rgba(0,0,0,0.25);
  border: 1px dashed var(--glass-border);
  border-radius: 14px;
  margin-bottom: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-start;
}
.reasoning-zone:empty::before {
  content: "My reasoning ...";
  color: var(--text-tertiary);
  font-style: italic;
  font-family: ui-monospace, monospace;
  font-size: 0.88rem;
}

#winScreen { border-color: var(--good); background: rgba(124, 212, 184, 0.06); }
#winScreen h2 { color: var(--good); font-size: 1.8rem; }
.win-message {
  font-size: 1.2rem;
  margin: 0 0 16px 0;
  font-style: italic;
}
.citations {
  text-align: left;
  background: rgba(0,0,0,0.25);
  padding: 14px 18px;
  border-radius: 14px;
}
.citations h3 { margin: 0 0 8px 0; font-size: 0.95rem; color: var(--accent); }
.citations ul { margin: 0; padding-left: 18px; }
.citations li { margin-bottom: 6px; font-size: 0.94rem; }
.citations a { color: var(--accent); border-bottom: 1px solid rgba(124,212,184,0.3); text-decoration: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .water-background { transition: none; }
}

@media (max-width: 480px) {
  header h1 { font-size: 2rem; }
  .lock-section h2 { font-size: 1.2rem; }
  .city-choice { grid-template-columns: 1fr; }
  .blank { width: 60px; }
}