/* ============================================================
   GameHub — Shared Stylesheet
   Provides CSS variables, base reset, and reusable components
   that every game page can include.
   Each game sets --game-accent and --game-accent-rgb to keep
   its own colour identity while sharing button/modal chrome.
   ============================================================ */

/* --- Default accent (red, used by the hub index) ---------- */
:root {
  --game-accent:       #e94560;
  --game-accent-rgb:   233, 69, 96;

  --bg-primary:        #1a1a2e;
  --bg-secondary:      #16213e;
  --bg-card:           rgba(255, 255, 255, 0.07);
  --bg-card-border:    rgba(255, 255, 255, 0.12);

  --text-primary:      #ffffff;
  --text-muted:        #aaaaaa;
  --text-dim:          #888888;

  --radius-sm:         8px;
  --radius-md:         12px;
  --radius-lg:         20px;
  --radius-pill:       50px;

  --transition:        all 0.25s ease;

  /* Shared button sizing */
  --btn-padding-md:    12px 32px;
  --btn-padding-sm:    9px 22px;
  --btn-font:          1rem;
  --btn-font-sm:       0.9rem;
  --btn-weight:        700;
}

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

/* --- Base body -------------------------------------------- */
body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-primary);
  overflow-x: hidden;
}

/* --- Game page title --------------------------------------- */
.game-title {
  color: var(--game-accent);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 10px;
  text-shadow: 0 0 12px rgba(var(--game-accent-rgb), 0.55);
  letter-spacing: 0.5px;
}

/* --- Inline score / info bar ------------------------------ */
.game-info-bar {
  display: flex;
  gap: 30px;
  margin-bottom: 12px;
  font-size: 1.05rem;
  color: var(--text-primary);
  flex-wrap: wrap;
  justify-content: center;
}
.game-info-bar span,
.game-info-bar .info-value {
  color: var(--game-accent);
  font-weight: 700;
}
.game-info-bar .info-label {
  color: var(--text-muted);
  margin-right: 4px;
}

/* --- Canvas wrapper --------------------------------------- */
.canvas-wrap {
  position: relative;
}
.game-canvas-border {
  border: 3px solid var(--game-accent);
  border-radius: var(--radius-md);
  box-shadow: 0 0 22px rgba(var(--game-accent-rgb), 0.32);
  display: block;
}

/* --- Buttons ---------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: var(--btn-padding-md);
  font-size: var(--btn-font);
  font-weight: var(--btn-weight);
  font-family: inherit;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1;
}
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Primary — uses the game's accent colour */
.btn-primary {
  background: var(--game-accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  transform: scale(1.05);
  box-shadow: 0 0 22px rgba(var(--game-accent-rgb), 0.55);
}

/* Secondary / neutral */
.btn-secondary {
  background: #3a3a5c;
  color: #fff;
}
.btn-secondary:hover:not(:disabled) {
  background: #4a4a70;
  transform: scale(1.04);
}

/* Back button */
.btn-back {
  padding: var(--btn-padding-sm);
  font-size: var(--btn-font-sm);
  background: #444;
  color: var(--text-primary);
}
.btn-back:hover:not(:disabled) {
  background: #555;
  transform: scale(1.04);
}

/* Danger */
.btn-danger {
  background: #c0392b;
  color: #fff;
}
.btn-danger:hover:not(:disabled) {
  background: #e74c3c;
  transform: scale(1.05);
}

/* Outline variant */
.btn-outline {
  background: transparent;
  border: 2px solid var(--game-accent);
  color: var(--game-accent);
}
.btn-outline:hover:not(:disabled) {
  background: rgba(var(--game-accent-rgb), 0.12);
  transform: scale(1.04);
}

/* Small size modifier */
.btn-sm {
  padding: var(--btn-padding-sm);
  font-size: var(--btn-font-sm);
}

/* --- Keyboard key badge ------------------------------------ */
kbd {
  background: #2e2e4a;
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  border: 1px solid #555;
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--game-accent);
}

/* --- Controls hint bar ------------------------------------ */
.controls-hint {
  margin-top: 14px;
  color: var(--text-muted);
  text-align: center;
  font-size: 0.88rem;
  line-height: 1.6;
}

/* --- Button row (below canvas / board) -------------------- */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
  justify-content: center;
}

/* --- Game-over / win overlay modal ------------------------ */
.gh-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.80);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}
.gh-modal-backdrop.hidden { display: none; }

.gh-modal {
  background: #0f1729;
  padding: 40px 52px;
  border-radius: var(--radius-md);
  border: 2px solid var(--game-accent);
  text-align: center;
  max-width: 460px;
  width: 90%;
  animation: modalIn 0.2s ease;
}
@keyframes modalIn {
  from { transform: scale(0.88); opacity: 0; }
  to   { transform: scale(1);    opacity: 1; }
}
.gh-modal h2 {
  color: var(--game-accent);
  font-size: 1.9rem;
  margin-bottom: 12px;
}
.gh-modal p {
  color: var(--text-primary);
  font-size: 1.05rem;
  margin-bottom: 14px;
}
.gh-modal .score-label {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 18px;
}

/* --- Name input for leaderboard --------------------------- */
.name-input-wrap {
  margin-bottom: 18px;
}
.name-input-wrap input {
  padding: 10px 16px;
  font-size: 1rem;
  border-radius: var(--radius-lg);
  border: 2px solid #444;
  background: #1a1a2e;
  color: var(--text-primary);
  text-align: center;
  width: 220px;
  outline: none;
  transition: border-color 0.2s;
}
.name-input-wrap input:focus {
  border-color: var(--game-accent);
}

/* --- Leaderboard panel ------------------------------------ */
.leaderboard-wrap {
  width: 100%;
  max-width: 340px;
  margin: 0 auto;
}
.leaderboard-table {
  width: 100%;
  color: var(--text-primary);
  border-collapse: collapse;
  font-size: 0.9rem;
}
.leaderboard-table th {
  color: var(--game-accent);
  padding: 8px 10px;
  border-bottom: 1px solid #333;
  text-align: left;
}
.leaderboard-table td {
  padding: 7px 10px;
  border-bottom: 1px solid #2a2a40;
}
.leaderboard-table tr:nth-child(1) td:first-child { color: #FFD700; }
.leaderboard-table tr:nth-child(2) td:first-child { color: #C0C0C0; }
.leaderboard-table tr:nth-child(3) td:first-child { color: #CD7F32; }

/* --- Side info panel (used by Tetris, Minesweeper …) ------ */
.side-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 170px;
}
.info-box {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 14px 18px;
}
.info-box h3 {
  color: var(--game-accent);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 6px;
}
.info-box .info-value {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* --- Pause overlay ---------------------------------------- */
.pause-overlay {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0,0,0,0.82);
  padding: 28px 50px;
  border-radius: var(--radius-md);
  border: 2px solid var(--game-accent);
  text-align: center;
}
.pause-overlay h2 {
  color: var(--game-accent);
  font-size: 2rem;
  margin-bottom: 8px;
}

/* --- Multiplayer badge ------------------------------------ */
.mp-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(var(--game-accent-rgb), 0.18);
  border: 1px solid rgba(var(--game-accent-rgb), 0.45);
  color: var(--game-accent);
  border-radius: var(--radius-pill);
  padding: 3px 12px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.mp-badge::before { content: '●'; font-size: 0.6rem; }

/* --- Player indicator pill -------------------------------- */
.player-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 0.9rem;
  transition: var(--transition);
}
.player-pill .avatar {
  font-size: 1.25rem;
  line-height: 1;
}
.player-pill .player-name {
  font-weight: 600;
  color: var(--text-primary);
}
.player-pill .player-score {
  color: var(--game-accent);
  font-weight: 700;
  margin-left: 6px;
}

/* --- Utility ---------------------------------------------- */
.text-accent  { color: var(--game-accent); }
.text-muted   { color: var(--text-muted); }
.text-center  { text-align: center; }
.hidden       { display: none !important; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.gap-sm       { gap: 8px; }
.gap-md       { gap: 16px; }
.mt-sm        { margin-top: 8px; }
.mt-md        { margin-top: 16px; }

/* --- Responsive ------------------------------------------- */
@media (max-width: 600px) {
  .game-title  { font-size: 1.6rem; }
  .gh-modal    { padding: 28px 24px; }
  .btn         { padding: 10px 22px; font-size: 0.92rem; }
}