/* ==========================================================================
   BestieMe Multiplayer Snake — Stylesheet
   --------------------------------------------------------------------------
   Layout mirrors the Chess Duels page so users get a consistent experience
   across the two arenas. Phone / tablet / PC tiers are tuned independently
   so the canvas always fits without scrolling on the active device.
   ========================================================================== */

.sd-wrap {
  max-width: 1280px;
  margin: 0 auto;
}

.sd-header {
  margin-bottom: var(--space-4);
  text-align: center;
}
.sd-title {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  margin: 0 0 var(--space-2);
}
.sd-subtitle {
  color: var(--text-secondary);
  font-size: clamp(0.85rem, 2vw, 1rem);
  margin: 0;
}

/* ───────── Menu ───────── */
.sd-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 640px;
  margin: 0 auto;
}

.sd-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  padding: 8px 14px 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.10);
  color: var(--text-secondary, #c0c0d0);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.18s ease;
}
.sd-back-btn:hover {
  background: rgba(99, 102, 241, 0.12);
  border-color: rgba(99, 102, 241, 0.45);
  color: #e0e4ff;
  transform: translateX(-2px);
}
.sd-back-btn:active { transform: translateX(-2px) scale(0.97); }
.sd-back-btn svg { display: block; flex-shrink: 0; }

.sd-menu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
}
.sd-menu-card h3 {
  margin: 0 0 var(--space-3);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}
.sd-menu-help {
  color: var(--text-tertiary);
  font-size: 0.8125rem;
  margin: 0 0 var(--space-3);
}
.sd-howto-list {
  margin: 0;
  padding-left: 1.2em;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.55;
}
.sd-howto-list li { margin-bottom: 4px; }
.sd-howto-list strong { color: var(--text-primary); }

.sd-name-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.sd-name-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}

.sd-start-btn {
  width: 100%;
  padding: var(--space-4);
  font-size: 1.0625rem;
  font-weight: 700;
  background: linear-gradient(120deg, #10b981, #06b6d4 55%, #6366f1);
  background-size: 200% 200%;
  border: none;
  color: #fff;
  box-shadow: 0 6px 22px rgba(16, 185, 129, 0.38);
  transition: transform 0.15s ease, box-shadow 0.2s ease, background-position 0.3s ease;
  letter-spacing: 0.4px;
}
.sd-start-btn:hover {
  background-position: 100% 50%;
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(99, 102, 241, 0.48);
}
.sd-start-btn:active { transform: translateY(0); }

.sd-fair-note {
  background: rgba(16, 185, 129, 0.07);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  line-height: 1.5;
}
.sd-fair-note strong { color: var(--success); }

.sd-signin-gate {
  background: rgba(245, 158, 11, 0.07);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
}
.sd-signin-gate p { margin: 0 0 var(--space-2); color: var(--text-secondary); font-size: 0.9375rem; }

/* ───────── Lobby ───────── */
.sd-lobby {
  display: flex;
  justify-content: center;
  padding: var(--space-4);
}
.sd-lobby-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  max-width: 520px;
  width: 100%;
  text-align: center;
}
.sd-lobby-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}
.sd-lobby-header h2 {
  margin: 0;
  font-size: 1.15rem;
}
.sd-lobby-room {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  color: var(--text-tertiary);
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  letter-spacing: 1px;
}
.sd-lobby-help {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  margin: 0 0 var(--space-4);
}
.sd-lobby-players {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: var(--space-4);
}
.sd-lobby-player {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  text-align: left;
}
.sd-lobby-player-swatch {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  flex-shrink: 0;
}
.sd-lobby-player-name {
  flex: 1;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.92rem;
}
.sd-lobby-player-tag {
  font-size: 0.7rem;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.sd-lobby-player-tag.host { color: #fbbf24; }
.sd-lobby-player-tag.you  { color: #6366f1; }
.sd-lobby-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
}

/* ───────── Game ───────── */
.sd-game-toolbar {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
  align-items: center;
}
.sd-status {
  margin-left: auto;
  display: inline-block;
  padding: 6px 18px;
  border-radius: 999px;
  background: linear-gradient(120deg, #10b981, #06b6d4 55%, #6366f1);
  background-size: 220% 220%;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
  animation: sd-status-shimmer 3.4s ease-in-out infinite;
}
@keyframes sd-status-shimmer {
  0%, 100% { background-position:   0% 50%; }
  50%      { background-position: 100% 50%; }
}

.sd-game-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(240px, 22%, 300px);
  gap: var(--space-4);
}
@media (max-width: 1024px) {
  .sd-game-grid { grid-template-columns: 1fr; }
}

.sd-board-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  position: relative;
}
.sd-clock-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
}
.sd-score-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sd-score-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-tertiary);
  letter-spacing: 1px;
}
.sd-score {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  min-width: 32px;
  text-align: right;
}

.sd-board-stage {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sd-board-host {
  width: min(100%, calc(100dvh - 240px));
  max-width: 100%;
  aspect-ratio: 4 / 3;
  margin: 0 auto;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #0c1224;
  box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.18);
}
.sd-canvas {
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
}

/* Device-tier board sizing */
@media (max-width: 600px) {
  .sd-board-host {
    width: min(calc(100vw - 8px), calc((100dvh - 220px) * 4 / 3));
    border-radius: 6px;
  }
  .sd-score { font-size: 1.05rem; }
}
@media (min-width: 601px) and (max-width: 1024px) {
  .sd-board-host {
    width: min(100%, calc((100dvh - 240px) * 4 / 3));
  }
}
@media (min-width: 1025px) {
  .sd-board-host {
    width: auto;
    height: min(60dvh, calc(100dvh - 300px));
    max-height: 60dvh;
  }
}

/* Fullscreen button */
.sd-fs-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 6;
  transition: background 0.2s ease;
}
.sd-fs-btn:hover { background: rgba(0, 0, 0, 0.7); }
.sd-fs-icon-exit { display: none; }

/* ───────── Fullscreen state ───────── */
.sd-board-col.sd-fs-active {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-primary, #0a0e1a);
  padding: 12px;
  gap: 8px;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100vw;
  height: 100dvh;
  overflow: hidden;
}
.sd-board-col.sd-fs-active .sd-clock-row {
  flex: 0 0 auto;
}
.sd-board-col.sd-fs-active .sd-board-stage {
  flex: 1 1 auto;
  min-height: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sd-board-col.sd-fs-active .sd-board-host {
  width: min(calc(100dvw - 24px), calc((100dvh - 100px) * 4 / 3));
  height: auto;
  max-width: none;
  max-height: 100%;
  aspect-ratio: 4 / 3;
  margin: 0 auto;
}
.sd-board-col.sd-fs-active .sd-fs-icon-enter { display: none; }
.sd-board-col.sd-fs-active .sd-fs-icon-exit  { display: block; }
.sd-board-col.sd-fs-active .sd-fs-btn { top: 14px; right: 14px; }
body.sd-fs-lock { overflow: hidden; }

/* ───────── On-screen direction pad (mobile) ───────── */
.sd-dpad {
  position: absolute;
  right: 10px;
  bottom: 10px;
  display: none;
  grid-template-columns: 44px 44px 44px;
  grid-template-rows: 44px 44px 44px;
  gap: 4px;
  z-index: 6;
}
.sd-dpad-btn {
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 1.1rem;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
  user-select: none;
}
.sd-dpad-btn:active { background: rgba(99, 102, 241, 0.55); }
.sd-dpad-up    { grid-column: 2; grid-row: 1; }
.sd-dpad-left  { grid-column: 1; grid-row: 2; }
.sd-dpad-right { grid-column: 3; grid-row: 2; }
.sd-dpad-down  { grid-column: 2; grid-row: 3; }
@media (max-width: 1024px) {
  .sd-dpad { display: grid; }
}
.sd-board-col.sd-fs-active .sd-dpad { display: grid; }

/* ───────── Side panel ───────── */
.sd-side-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.sd-side-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.sd-side-card h4 {
  margin: 0 0 var(--space-3);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
}
.sd-rewards-text       { color: var(--text-secondary); margin: 0 0 var(--space-2); font-size: 0.9rem; }
.sd-rewards-text-small { color: var(--text-tertiary); margin: 0; font-size: 0.78rem; line-height: 1.5; }

.sd-leaderboard {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.sd-leaderboard li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 8px;
  font-size: 0.87rem;
}
.sd-leaderboard li.dead { opacity: 0.5; text-decoration: line-through; }
.sd-leaderboard li.you  { background: rgba(99, 102, 241, 0.12); }
.sd-leaderboard .lb-swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
}
.sd-leaderboard .lb-name { flex: 1; font-weight: 600; color: var(--text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sd-leaderboard .lb-score { font-family: "JetBrains Mono", monospace; color: var(--text-secondary); }

/* ───────── Result overlay ───────── */
.sd-result-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(8, 10, 20, 0.75);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.sd-result-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  max-width: 420px;
  width: 100%;
  text-align: center;
  position: relative;
  animation: sd-result-pop 0.25s ease-out;
}
@keyframes sd-result-pop {
  from { transform: scale(0.92); opacity: 0; }
  to   { transform: scale(1);    opacity: 1; }
}
.sd-result-close {
  position: absolute;
  top: 8px;
  right: 12px;
  width: 28px;
  height: 28px;
  background: transparent;
  border: none;
  color: var(--text-tertiary);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}
.sd-result-close:hover { color: var(--text-primary); }
.sd-result-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: var(--space-2);
  background: linear-gradient(120deg, #10b981, #6366f1);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.sd-result-sub {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--space-4);
}
.sd-result-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
}