/* ── CSS custom properties (updated per-run by game.js) ─── */
:root {
  --accent:  #39ff14;
  --snake:   #39ff14;
  --food:    #ff4444;
  --border:  #333;
}

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

body {
  background: #0f0f0f;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  font-family: 'Courier New', Courier, monospace;
  color: #fff;
  user-select: none;
  -webkit-user-select: none;
  overscroll-behavior: none;
  padding: 16px 0 24px;
  gap: 0;
}

/* ── Scoreboard ──────────────────────────────────────────── */

#scoreboard {
  width: min(390px, calc(100vw - 32px));
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #111;
  border: 2px solid var(--border);
  border-bottom: none;
  padding: 8px 14px;
  transition: border-color 0.6s ease;
}

.score-label {
  font-size: 13px;
  letter-spacing: 2px;
  color: #ccc;
  text-transform: uppercase;
}

#score-value {
  font-size: 28px;
  color: var(--accent);
  min-width: 3ch;
  text-align: right;
  transition: color 0.6s ease;
}

/* ── NLP pipeline bar ────────────────────────────────────── */

#pipeline-bar {
  width: min(390px, calc(100vw - 32px));
  background: #0a0a0a;
  border: 2px solid var(--border);
  border-bottom: none;
  padding: 6px 12px;
  overflow: hidden;
  transition: border-color 0.6s ease;
}

#pipeline-inner {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  transition: transform 0.5s ease;   /* default smooth scroll */
}

/* JS adds these classes to override the default transition duration */
#pipeline-inner.pipeline-fast    { transition: transform 0.2s ease; }
#pipeline-inner.pipeline-instant { transition: none; }

.stage {
  font-size: 13px;
  letter-spacing: 1px;
  color: #ccc;
  white-space: nowrap;
  flex: 0 0 auto;
  transition: color 0.4s ease;
}

.stage.active {
  color: #eee;
}

.stage.current {
  color: var(--accent);
  font-weight: bold;
  transition: color 0.4s ease;
}

.sep {
  font-size: 13px;
  color: #999;
  flex: 0 0 auto;
}

/* ── Canvas wrapper ──────────────────────────────────────── */

#canvas-wrapper {
  position: relative;
  line-height: 0;
  width: min(390px, calc(100vw - 32px));
}

canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  background: #000;
  border: 2px solid var(--border);
  cursor: pointer;
  touch-action: none;
  transition: border-color 0.6s ease;
}

/* ── Pause overlay ───────────────────────────────────────── */

#pause-overlay {
  position: absolute;
  inset: 2px;           /* leave the 2 px canvas border fully visible */
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

/* ── Global visibility utility ───────────────────────────── */
.hidden { display: none !important; }

.pause-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}

.pause-icon { display: flex; gap: 12px; }

.bar {
  width: 14px;
  height: 56px;
  background: var(--accent);
  border-radius: 3px;
}

.pause-hint {
  /* Mirrors the canvas waiting-screen hint exactly:
     ctx.font = "13px monospace", ctx.fillStyle = "#aaa", ctx.globalAlpha = 0.40 */
  font-size: 13px;
  color: #aaa;
  opacity: 0.40;
  text-align: center;
}

/* ── Project panel (post-game) ───────────────────────────── */

#project-panel {
  width: min(390px, calc(100vw - 32px));
  background: #0d0d0d;
  border: 2px solid var(--border);
  border-top: none;
  padding: 16px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 0.6s ease;
}

/* Project card */
#project-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#project-header {
  display: flex;
  align-items: center;
  gap: 10px;
}

#project-tag {
  font-size: 10px;
  font-weight: bold;
  letter-spacing: 2px;
  color: #000;
  background: var(--accent);
  padding: 2px 7px;
  border-radius: 3px;
  transition: background 0.6s ease;
  flex-shrink: 0;
}

#project-name {
  font-size: 15px;
  font-weight: bold;
  color: #fff;
  letter-spacing: 0.5px;
}

#project-desc {
  font-size: 14px;
  color: #ddd;
  line-height: 1.6;
}

#project-link {
  font-size: 12px;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: color 0.6s ease;
}

#project-link:hover { text-decoration: underline; }

/* Divider */
#project-panel hr {
  border: none;
  border-top: 1px solid #1f1f1f;
}

/* Chatbot section */
#chatbot {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.chatbot-label {
  font-size: 13px;
  color: #aaa;
  letter-spacing: 0.5px;
}

#keyword-row {
  display: flex;
  gap: 6px;
}

#keyword-input {
  flex: 1;
  background: #111;
  border: 1px solid #333;
  border-radius: 3px;
  color: #fff;
  font-family: inherit;
  font-size: 15px;
  padding: 6px 10px;
  outline: none;
  transition: border-color 0.2s;
}

#keyword-input::placeholder { color: #3a3a3a; }
#keyword-input:focus { border-color: var(--accent); }

#keyword-btn {
  background: #1a1a1a;
  border: 1px solid #333;
  border-radius: 3px;
  color: var(--accent);
  font-size: 16px;
  padding: 0 12px;
  cursor: pointer;
  transition: background 0.1s, color 0.6s ease;
  font-family: inherit;
}

#keyword-btn:hover { background: #222; }

/* Keyword results */
#keyword-results {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.result-item {
  background: #111;
  border: 1px solid #222;
  border-radius: 3px;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.result-item-header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.result-tag {
  font-size: 9px;
  font-weight: bold;
  letter-spacing: 1.5px;
  color: #000;
  background: var(--accent);
  padding: 1px 5px;
  border-radius: 2px;
  transition: background 0.6s ease;
}

.result-name {
  font-size: 12px;
  font-weight: bold;
  color: #ccc;
}

.result-desc {
  font-size: 11px;
  color: #555;
  line-height: 1.5;
}

.result-link {
  font-size: 11px;
  color: var(--accent);
  text-decoration: none;
  transition: color 0.6s ease;
}

.result-link:hover { text-decoration: underline; }

.no-match {
  font-size: 12px;
  color: #444;
}

.chatbot-alt {
  font-size: 13px;
  color: #888;
  letter-spacing: 0.3px;
}

/* Play again */
#play-again {
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: 3px;
  color: var(--accent);
  font-family: inherit;
  font-size: 13px;
  letter-spacing: 2px;
  padding: 8px;
  cursor: pointer;
  transition: background 0.1s, color 0.6s ease, border-color 0.6s ease;
}

#play-again:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* ── D-pad ───────────────────────────────────────────────── */

#dpad {
  display: none;
  position: relative;
  width: 200px;
  height: 200px;
  margin-top: 24px;
}

/* Thin ring passing through each button's centre */
#dpad::before {
  content: '';
  position: absolute;
  inset: 30px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.dpad-btn {
  position: absolute;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #1e1e1e;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #666;
  font-size: 20px;
  cursor: pointer;
  touch-action: manipulation;
  outline: none;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.07s, color 0.07s;
}

.dpad-btn:active {
  background: #2e2e2e;
  color: var(--accent);
}

#btn-up    { top: 0;    left: 50%; transform: translateX(-50%); }
#btn-down  { bottom: 0; left: 50%; transform: translateX(-50%); }
#btn-left  { left: 0;   top:  50%; transform: translateY(-50%); }
#btn-right { right: 0;  top:  50%; transform: translateY(-50%); }

@media (pointer: coarse) {
  #dpad:not(.hidden) { display: block; }
}