:root {
  --bg: #020617;
  --text: #e5e7eb;
  --accent: #38bdf8;
  --danger: #fb7185;
  --muted: #94a3b8;
  --label: #df4adf;

  --panel: rgba(2, 6, 23, 0.9);
  --panel-soft: rgba(2, 6, 23, 0.7);
  --border: #1e293b;
  --button-bg: #020617;
}

/* LIGHT THEME */
html[data-theme="light"] {
  --bg: #f8fafc;
  --text: #0f172a;
  --accent: #2563eb;
  --danger: #dc2626;
  --muted: #475569;

  --panel: rgba(248, 250, 252, 0.9);
  --panel-soft: rgba(248, 250, 252, 0.7);
  --border: #cbd5e1;
  --button-bg: #ffffff;
}

* {
  box-sizing: border-box;
  font-family: system-ui, sans-serif;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

/* PAGE */
.game-page {
  position: relative;
  width: 100%;
  height: 100%;
}

/* HEADER */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;

  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;

  padding: 0 24px;

  background: var(--panel);
  border-bottom: 1px solid var(--border);
  z-index: 20;
}

.home-link {
  text-decoration: none;
  color: var(--text);
  padding: 8px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-soft);
}

.timer {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--accent);
}

.timer.warning {
  color: var(--danger);
  animation: pulse 1s infinite;
}

.header-controls {
  display: flex;
  gap: 12px;
}

.header-controls button.active {
  background: var(--accent);
  color: var(--bg);
}

/* MAIN */
.app-main {
  position: absolute;
  top: 72px;
  bottom: 72px;
  left: 0;
  right: 0;
  overflow: hidden;
}

/* CONTENT */
.content {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.forbidden {
  position: absolute;
  top: 24px;
  left: 24px;
  right: 24px;

  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;

  max-height: 32vh;
  overflow-y: auto;
  padding-inline: 12px;
  padding-block: 8px;

  font-size: clamp(1rem, 1.2vw, 1.4rem);
  font-weight: 700;
  color: var(--danger);
  z-index: 2;
}

.forbidden-title {
  grid-column: 1 / -1;
  /* 👈 span full width of grid */

  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;

  color: var(--muted);
  text-transform: uppercase;

  padding: 4px 2px 8px;
}

.forbidden span {
  background: color-mix(in srgb, var(--danger) 18%, transparent);
  padding: 10px 14px;
  border-radius: 12px;
  text-align: center;
  white-space: nowrap;
}

/* TERM */
.term {
  position: absolute;
  inset: 0;

  display: flex;
  align-items: center;
  justify-content: center;

  padding: 20vh 24px 16vh;
  /* 👈 breathing room, NOT fixed pixels */

  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 900;
  color: var(--accent);
  text-align: center;
  z-index: 1;
  pointer-events: none;
}

.term.time-up {
  opacity: 0.75;
  filter: grayscale(100%) blur(1.5px);
}

.app-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;

  height: 72px;
  padding: 0 12px;

  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;

  background: var(--panel);
  border-top: 1px solid var(--border);
  z-index: 20;
}

/* Center label */
.deck-label {
  justify-self: center;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--label);
}

/* Navigation buttons */
.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;

  padding: 8px 14px;
  /* readable, not bulky */
  font-size: 1rem;
  font-weight: 600;

  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-soft);
  color: var(--text);

  cursor: pointer;
  white-space: nowrap;
}

/* Icons */
.nav-btn .icon {
  font-size: 1rem;
}

/* Keyboard hint */
.nav-btn .key {
  font-size: 0.75rem;
  opacity: 0.6;

  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 6px;
}

.controls {
  display: flex;
  gap: 16px;
}

.counter {
  justify-self: end;
  font-weight: 600;
  color: var(--muted);

  background: var(--panel-soft);
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

/* BUTTONS */
button {
  padding: 10px 16px;
  font-size: 1rem;
  border-radius: 12px;
  border: 2px solid var(--border);
  background: var(--button-bg);
  color: var(--text);
  cursor: pointer;
}

/* ANIMATIONS */
.fade-right {
  animation: slideRight 280ms ease-out;
}

.fade-left {
  animation: slideLeft 280ms ease-out;
}

@keyframes slideRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0% {
    opacity: 1;
  }

  50% {
    opacity: 0.6;
  }

  100% {
    opacity: 1;
  }
}

/* MOBILE FIRST: prevent overlap */
@media (max-width: 768px) {
  .forbidden {
    top: 72px;
    left: 16px;
    right: 16px;
    max-width: none;
  }

  .term {
    padding-top: 220px;
    /* space for forbidden */
    padding-bottom: 120px;
  }
}

.desktop-only {
  display: flex;
}

.mobile-only {
  display: none;
}

@media (max-width: 768px) {
  .desktop-only {
    display: none !important;
  }

  .mobile-only {
    display: inline-flex;
  }
}

.mobile-menu {
  position: fixed;
  top: 72px;
  left: 12px;
  right: 12px;

  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;

  padding: 16px;
  display: grid;
  gap: 12px;

  z-index: 50;
}

.slide-counter {
  position: absolute;
  right: 16px;
  bottom: 16px;

  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);

  background: var(--panel-soft);
  padding: 8px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);

  pointer-events: none;
}

@media (max-width: 480px) {
  .nav-btn {
    padding: 8px;
    gap: 0;
  }

  .nav-btn .label,
  .nav-btn .key {
    display: none;
  }

  .nav-btn .icon {
    font-size: 1.2rem;
  }
}

@media (max-width: 768px) {
  .forbidden {
    left: 12px;
    right: 12px;
    padding-inline: 10px;

    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    max-height: 28vh;
    font-size: 0.95rem;
  }

  .forbidden-title {
    font-size: 0.8rem;
    text-align: center;
  }

  .term {
    font-size: clamp(2.6rem, 9vw, 4.2rem);
    padding: 32vh 16px 14vh;
  }
}