/* English Article Tetris — original dark teal / cream theme
   Smartphone-first UX */

:root {
  --bg: #0d2e2e;
  --bg-deep: #081f1f;
  --panel: #123838;
  --teal: #1a5c5c;
  --teal-bright: #2a8f8f;
  --cream: #f5ead6;
  --cream-dark: #e8d4b0;
  --ink: #1a2a2a;
  --accent: #f0a050;
  --danger: #e06060;
  --ok: #6ecf8e;
  --text: #e8f0f0;
  --muted: #9ab8b8;
  --lane-gap: 4px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --touch-bar-h: 0px;
}

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

html, body {
  height: 100%;
  height: 100dvh;
  background: radial-gradient(ellipse at 50% 0%, #164848 0%, var(--bg) 45%, var(--bg-deep) 100%);
  color: var(--text);
  font-family: var(--font);
  overscroll-behavior: none;
  touch-action: manipulation;
  overflow: hidden;
}

#app {
  min-height: 100%;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: calc(0.5rem + var(--safe-top)) 0.6rem calc(0.5rem + var(--safe-bottom));
  gap: 0.4rem;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
}

.top-bar {
  text-align: center;
  flex-shrink: 0;
  width: 100%;
}

.logo {
  font-size: clamp(1.05rem, 4.2vw, 2rem);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--cream);
  text-shadow: 0 2px 0 rgba(0,0,0,0.35);
  line-height: 1.15;
}

.tagline {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.15rem;
}

.hidden { display: none !important; }

/* Overlays */
.overlay-panel {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 31, 31, 0.9);
  padding: calc(0.75rem + var(--safe-top)) 0.75rem calc(0.75rem + var(--safe-bottom));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.panel-card {
  background: var(--panel);
  border: 2px solid var(--teal-bright);
  border-radius: 16px;
  padding: 1.25rem 1.1rem 1.35rem;
  max-width: 480px;
  width: 100%;
  max-height: min(92dvh, 100%);
  overflow-y: auto;
  box-shadow: 0 12px 40px rgba(0,0,0,0.45);
  overscroll-behavior: contain;
}

.panel-card h2 {
  color: var(--cream);
  margin-bottom: 0.75rem;
  font-size: 1.35rem;
}

.panel-sub {
  color: var(--muted);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.howto {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 1rem;
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--text);
}

.howto-en {
  font-size: 0.8rem;
  color: var(--muted);
}

.howto em {
  color: var(--accent);
  font-style: normal;
  font-weight: 700;
}

.controls-hint {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.controls-hint span {
  background: var(--bg-deep);
  border: 1px solid var(--teal);
  border-radius: 8px;
  padding: 0.4rem 0.65rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.touch-hints { display: none; }
.kb-hints { display: flex; }

.btn {
  appearance: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 12px;
  padding: 0.7rem 1.4rem;
  transition: transform 0.08s ease, background 0.15s ease;
  touch-action: manipulation;
}

.btn:active { transform: scale(0.97); }

.btn.primary {
  background: var(--accent);
  color: var(--ink);
  width: 100%;
}

.btn.primary:active { background: #f8b56a; }

.btn-huge {
  min-height: 52px;
  font-size: 1.15rem;
  padding: 0.85rem 1.4rem;
}

.btn.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--teal);
  width: auto;
  margin-top: 0;
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
  min-height: 44px;
  align-self: center;
}

.btn.ghost:active {
  color: var(--cream);
  border-color: var(--teal-bright);
}

.go-score {
  font-size: 1.25rem;
  margin: 0.75rem 0 1.1rem;
}

.go-reason {
  color: var(--muted);
}

/* Game layout — column: HUD strip → board → touch bar */
#game-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  align-items: stretch;
  width: 100%;
  flex: 1;
  min-height: 0;
  padding-bottom: var(--touch-bar-h);
}

.hud {
  background: var(--panel);
  border: 2px solid var(--teal);
  border-radius: 12px;
  padding: 0.4rem 0.5rem;
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.35rem;
  flex-shrink: 0;
  width: 100%;
  overflow: hidden;
}

.hud-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 0;
  flex: 1 1 0;
}

.hud-block .label {
  display: block;
  font-size: 0.58rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.05rem;
  white-space: nowrap;
}

.hud-block .value {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--cream);
  line-height: 1.15;
  white-space: nowrap;
}

.hearts {
  letter-spacing: 0.08em;
  color: var(--danger) !important;
  font-size: 0.95rem !important;
}

.next-box {
  background: var(--bg-deep);
  border-radius: 8px;
  padding: 0.2rem 0.35rem 0.3rem;
  border: 1px dashed var(--teal);
  flex: 1.4 1 0;
  min-width: 72px;
}

.next-piece {
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--cream);
  color: var(--ink);
  border-radius: 6px;
  padding: 0.2rem 0.25rem;
  margin-top: 0.15rem;
  width: 100%;
}

.next-word {
  font-weight: 800;
  font-size: 0.72rem;
  text-align: center;
  line-height: 1.1;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.next-phonetic {
  font-size: 0.58rem;
  color: #5a6a5a;
  margin-top: 0.05rem;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.board-area {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  flex: 1 1 auto;
  min-height: 0;
  width: 100%;
  touch-action: none;
  overscroll-behavior: none;
  user-select: none;
  -webkit-user-select: none;
}

#board {
  display: block;
  background: var(--bg-deep);
  border: 3px solid var(--teal-bright);
  border-radius: 12px 12px 0 0;
  box-shadow: 0 8px 28px rgba(0,0,0,0.4);
  image-rendering: auto;
  width: 100%;
  height: auto;
  max-height: 100%;
  touch-action: none;
  flex: 1 1 auto;
  min-height: 0;
}

.lane-labels {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--lane-gap);
  background: var(--panel);
  border: 3px solid var(--teal-bright);
  border-top: none;
  border-radius: 0 0 12px 12px;
  padding: 0.2rem 0.15rem 0.35rem;
  flex-shrink: 0;
  touch-action: none;
}

.lane-label {
  appearance: none;
  border: none;
  background: transparent;
  color: inherit;
  font-family: inherit;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.05rem;
  min-height: 48px;
  padding: 0.35rem 0.15rem;
  border-radius: 8px;
  cursor: pointer;
  touch-action: manipulation;
}

.lane-label:active {
  background: rgba(42, 143, 143, 0.35);
}

.lane-label .art {
  font-weight: 800;
  font-size: clamp(0.78rem, 3.2vw, 1.05rem);
  color: var(--accent);
  line-height: 1.15;
  word-break: break-word;
  hyphens: auto;
  max-width: 100%;
}

.lane-label small {
  font-size: clamp(0.52rem, 2vw, 0.65rem);
  color: var(--muted);
  line-height: 1.1;
}

.lane-phrases {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--lane-gap);
  min-height: 1.15rem;
  margin-bottom: 0.15rem;
  font-size: clamp(0.55rem, 2.2vw, 0.7rem);
  text-align: center;
  color: var(--ok);
  font-weight: 600;
  flex-shrink: 0;
}

.lane-phrases span {
  opacity: 0;
  transition: opacity 0.2s;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lane-phrases span.show {
  opacity: 1;
}

.feedback {
  position: absolute;
  top: 38%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 5;
  background: rgba(8, 31, 31, 0.94);
  border: 2px solid var(--danger);
  color: var(--cream);
  padding: 0.85rem 1.1rem;
  border-radius: 12px;
  font-weight: 700;
  font-size: clamp(0.95rem, 3.8vw, 1.15rem);
  line-height: 1.35;
  text-align: center;
  max-width: 92%;
  pointer-events: none;
  animation: popIn 0.2s ease;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
}

.feedback.ok {
  border-color: var(--ok);
}

@keyframes popIn {
  from { opacity: 0; transform: translate(-50%, -40%) scale(0.9); }
  to   { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

/* Touch control bar — fixed thumb zone */
.touch-bar {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 15;
  grid-template-columns: 1fr 1fr 1fr 1.35fr;
  gap: 0.4rem;
  padding: 0.45rem 0.55rem calc(0.45rem + var(--safe-bottom));
  padding-left: calc(0.55rem + var(--safe-left));
  padding-right: calc(0.55rem + var(--safe-right));
  background: linear-gradient(180deg, rgba(8, 31, 31, 0.92), var(--bg-deep) 40%);
  border-top: 2px solid var(--teal);
  touch-action: none;
  overscroll-behavior: none;
}

.touch-btn {
  appearance: none;
  border: 2px solid var(--teal-bright);
  background: var(--panel);
  color: var(--cream);
  font-family: inherit;
  font-weight: 800;
  font-size: 1.35rem;
  border-radius: 14px;
  min-height: 56px;
  height: 60px;
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.touch-btn:active {
  background: var(--teal);
  transform: scale(0.97);
}

.touch-drop {
  background: var(--accent);
  color: var(--ink);
  border-color: #d89040;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}

.touch-drop:active {
  background: #f8b56a;
}

/* Narrow / touch-first */
@media (max-width: 720px), (hover: none) and (pointer: coarse) {
  :root {
    --touch-bar-h: calc(68px + env(safe-area-inset-bottom, 0px));
  }

  .tagline { display: none; }

  .logo {
    font-size: clamp(1rem, 4vw, 1.25rem);
  }

  #app {
    padding-top: calc(0.35rem + var(--safe-top));
    padding-bottom: 0;
    gap: 0.3rem;
  }

  .touch-bar {
    display: grid;
  }

  .touch-hints { display: flex; }
  .kb-hints { display: none; }

  .howto-en { display: none; }

  .panel-card {
    padding: 1.1rem 1rem 1.2rem;
  }
}

/* Very small phones */
@media (max-width: 380px) {
  .hud-block .value { font-size: 0.92rem; }
  .hearts { font-size: 0.85rem !important; }
  .next-word { font-size: 0.65rem; }
  .lane-label { min-height: 44px; padding: 0.25rem 0.1rem; }
  .touch-btn {
    min-height: 52px;
    height: 56px;
    font-size: 1.2rem;
  }
  .touch-drop { font-size: 0.85rem; }
}

/* Desktop / wide: keep touch bar hidden unless coarse pointer;
   HUD can breathe a bit more */
@media (min-width: 721px) and (hover: hover) {
  .hud {
    padding: 0.55rem 0.75rem;
  }
  .hud-block .label { font-size: 0.65rem; }
  .hud-block .value { font-size: 1.25rem; }
  .next-word { font-size: 0.85rem; }
  .next-phonetic { font-size: 0.65rem; }
  .lane-label { min-height: 52px; }
  .lane-label .art { font-size: 1rem; }
}

/* When game not visible, no touch bar padding */
#game-wrap.hidden {
  padding-bottom: 0;
}