/* ========================================
   贪吃蛇游戏 - 悟空风格界面
   ======================================== */

:root {
  --sky: #183553;
  --night: #110c09;
  --panel: rgba(39, 27, 19, 0.9);
  --panel-strong: rgba(48, 32, 21, 0.97);
  --line: rgba(255, 211, 126, 0.34);
  --gold: #ffd56f;
  --amber: #f0a23b;
  --jade: #73e3b3;
  --fire: #ff7138;
  --rose: #ff7770;
  --text: #fff8ea;
  --muted: #e5d0aa;
  --shadow: 0 18px 54px rgba(0, 0, 0, 0.36);
  --radius: 8px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

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

html,
body {
  width: 100%;
  min-height: 100%;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-body);
  background:
    linear-gradient(145deg, rgba(255, 213, 111, 0.13) 0 12%, transparent 12% 100%),
    linear-gradient(215deg, rgba(115, 227, 179, 0.11) 0 15%, transparent 15% 100%),
    linear-gradient(180deg, var(--sky), #302119 58%, var(--night));
  touch-action: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.16;
  background:
    repeating-linear-gradient(0deg, transparent 0 36px, rgba(255, 248, 234, 0.08) 36px 37px),
    repeating-linear-gradient(90deg, transparent 0 42px, rgba(255, 213, 111, 0.07) 42px 43px);
}

button,
a {
  font: inherit;
}

.game-container {
  position: relative;
  z-index: 1;
  width: min(100% - 20px, 520px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 14px 0 18px;
  display: grid;
  grid-template-rows: auto auto auto auto auto;
  align-content: center;
  gap: 10px;
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  min-width: 0;
}

.brand h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 8vw, 2.35rem);
  line-height: 1.05;
  font-weight: 900;
  letter-spacing: 0;
  color: var(--text);
  text-shadow: 0 3px 0 rgba(41, 22, 8, 0.48), 0 0 22px rgba(255, 213, 111, 0.2);
}

.brand-tagline {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.header-actions {
  display: flex;
  gap: 8px;
}

.score-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.score-item {
  min-height: 66px;
  padding: 10px 12px;
  border: 1px solid rgba(255, 211, 126, 0.24);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.score-label {
  display: block;
  color: var(--muted);
  font-size: 0.74rem;
}

.score-value {
  display: block;
  margin-top: 5px;
  color: var(--gold);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 6vw, 1.85rem);
  font-weight: 900;
  line-height: 1;
}

.score-value.best {
  color: var(--jade);
}

.game-canvas-wrapper {
  position: relative;
  justify-self: center;
  width: fit-content;
  max-width: 100%;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 213, 111, 0.12), transparent 42%),
    var(--panel-strong);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.game-canvas-wrapper::before {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(255, 248, 234, 0.07);
  border-radius: 6px;
  pointer-events: none;
}

#gameCanvas {
  position: relative;
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  background: #14243a;
}

.btn {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 850;
  transition: transform var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.btn:focus-visible,
.option-btn:focus-visible,
.dpad-btn:focus-visible,
.modal-close:focus-visible {
  outline: 3px solid rgba(255, 213, 111, 0.34);
  outline-offset: 2px;
}

.btn-icon {
  width: 42px;
  padding: 0;
}

.btn-primary {
  min-height: 46px;
  border: 0;
  color: #271608;
  background: linear-gradient(135deg, var(--gold), var(--amber));
  box-shadow: 0 8px 20px rgba(240, 162, 59, 0.22);
}

.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-primary:active,
.btn-secondary:active,
.dpad-btn:active {
  transform: translateY(1px);
}

.btn-secondary:hover {
  border-color: rgba(255, 211, 126, 0.38);
  background: rgba(255, 213, 111, 0.13);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  background: rgba(14, 9, 6, 0.72);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  width: min(410px, 100%);
  max-height: min(680px, calc(100vh - 36px));
  overflow: hidden;
  border: 1px solid rgba(255, 211, 126, 0.38);
  border-radius: var(--radius);
  background: var(--panel-strong);
  box-shadow: var(--shadow);
  transform: translateY(10px) scale(0.98);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 18px;
  border-bottom: 1px solid rgba(255, 211, 126, 0.22);
}

.modal-title {
  color: var(--gold);
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 900;
}

.modal-close {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
}

.modal-close:hover {
  border-color: rgba(255, 211, 126, 0.38);
}

.modal-body {
  padding: 18px;
  overflow-y: auto;
}

.setting-group {
  margin-bottom: 22px;
}

.setting-group:last-child {
  margin-bottom: 0;
}

.setting-label {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.setting-options {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

#skinOptions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.option-btn {
  min-height: 40px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  font-size: 0.86rem;
  font-weight: 800;
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.option-btn:hover {
  border-color: rgba(255, 211, 126, 0.38);
}

.option-btn.active {
  border-color: transparent;
  color: #271608;
  background: linear-gradient(135deg, var(--gold), var(--amber));
}

.skin-preview-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 10px;
  border: 1px solid rgba(255, 211, 126, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.07);
}

.skin-preview-item {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.skin-preview-item img {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  object-fit: contain;
  padding: 4px;
  border: 1px solid rgba(255, 211, 126, 0.18);
  border-radius: 6px;
  background: rgba(17, 12, 9, 0.72);
}

.skin-preview-label {
  color: var(--muted);
  font-size: 0.78rem;
}

.game-overlay {
  position: absolute;
  inset: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 13px;
  padding: 18px;
  border-radius: 6px;
  background: linear-gradient(180deg, rgba(24, 53, 83, 0.46), rgba(17, 12, 9, 0.9));
  backdrop-filter: blur(5px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.game-overlay.active {
  opacity: 1;
  visibility: visible;
}

.overlay-title {
  color: var(--gold);
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 8vw, 2.8rem);
  line-height: 1.05;
  font-weight: 900;
  text-align: center;
  text-shadow: 0 3px 0 rgba(41, 22, 8, 0.5);
}

.overlay-score {
  color: var(--text);
  font-size: 1.1rem;
}

.overlay-hint {
  color: var(--muted);
  font-size: 0.86rem;
  text-align: center;
}

.game-footer {
  text-align: center;
}

.hint-text {
  color: var(--muted);
  font-size: 0.78rem;
}

.mobile-controls {
  display: none;
}

.dpad {
  display: grid;
  grid-template-columns: repeat(3, minmax(56px, 1fr));
  grid-template-rows: repeat(3, 56px);
  gap: 8px;
}

.dpad-btn {
  min-width: 0;
  min-height: 56px;
  border: 1px solid rgba(255, 211, 126, 0.34);
  border-radius: var(--radius);
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  font-size: 1.35rem;
  font-weight: 900;
  cursor: pointer;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.dpad-btn:hover,
.dpad-btn:active {
  border-color: rgba(255, 211, 126, 0.58);
  background: rgba(255, 213, 111, 0.17);
}

.dpad-btn.up { grid-column: 2; grid-row: 1; }
.dpad-btn.left { grid-column: 1; grid-row: 2; }
.dpad-btn.right { grid-column: 3; grid-row: 2; }
.dpad-btn.down { grid-column: 2; grid-row: 3; }

@media (max-width: 900px), (pointer: coarse) {
  .mobile-controls {
    display: block;
  }
}

@media (max-width: 560px) {
  body {
    overflow-y: auto;
  }

  .game-container {
    width: min(100% - 12px, 520px);
    min-height: 100dvh;
    padding-top: 8px;
    align-content: start;
    gap: 8px;
  }

  .game-header {
    align-items: flex-start;
  }

  .score-item {
    min-height: 58px;
    padding: 9px 10px;
  }

  .game-canvas-wrapper {
    padding: 7px;
  }

  .game-overlay {
    inset: 7px;
  }

  .dpad {
    grid-template-rows: repeat(3, 52px);
    gap: 7px;
  }

  .dpad-btn {
    min-height: 52px;
  }

  .hint-text {
    display: none;
  }
}

@media (max-height: 760px) and (max-width: 560px) {
  .brand-tagline,
  .game-footer {
    display: none;
  }

  .dpad {
    grid-template-rows: repeat(3, 46px);
  }

  .dpad-btn {
    min-height: 46px;
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.68; }
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-slide-in {
  animation: slideIn 0.3s ease forwards;
}