/* ===========================================================================
 * G6 · 末日避難所（Shelter 100）— style.css
 * GDD §2：废土工业风地底舱——深灰金属舱壁 + 琥珀色应急灯 + 管道锈蚀纹理
 *         告警用红色旋转警示灯与阀门嘶鸣，整体"压抑但有序、与倒计时赛跑"。
 * =========================================================================== */

/* ------------------------------- CSS Variables ----------------------------- */
:root {
  /* 核心色板（GDD §2） */
  --bunker-dark:     #1A1A20;
  --bunker-panel:    #252530;
  --bunker-light:    #3A3A45;
  --metal-rust:      #5C4033;
  --metal-rust-dark: #3D2820;
  --amber-glow:      #FFB627;
  --amber-dim:       #CC9220;
  --supply-green:    #4CAF50;
  --water-cyan:      #00BCD4;
  --airlock-orange:  #FF6F00;
  --food-lime:       #8BC34A;
  --alert-red:       #E53935;
  --warn-amber:      #FF9800;
  --concrete:        #616161;
  --ghost-text:      #9E9EAE;
  --metal-sheen:     #4E4E5A;
  --pipe-bronze:     #8D6E63;
  --hazard-yellow:   #FFD600;

  --card-shadow: rgba(0, 0, 0, 0.5);

  /* 字体 */
  --font-title: 'Orbitron', 'Rajdhani', 'Noto Sans TC', sans-serif;
  --font-body: 'Noto Sans TC', 'Rajdhani', sans-serif;
  --font-number: 'Rajdhani', 'Orbitron', sans-serif;
  --font-clock: 'Orbitron', monospace;

  /* 圆角（工业风偏小） */
  --radius-btn: 10px;
  --radius-bar: 3px;
  --radius-modal: 16px;
  --radius-card: 10px;
}

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

body {
  font-family: var(--font-body);
  background: var(--bunker-dark);
  color: var(--ghost-text);
  min-height: 100vh;
  overflow-x: hidden;
}
/* 主廳全屏背景圖（G6 暗色避難所主題，背景接線慣例：body::before 底圖 + body::after 疊層） */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -2;
  background: url('images/g6_bg_shelter.webp') center / cover no-repeat;
}
body::after {
  content: "";
  position: fixed; inset: 0; z-index: -1;
  pointer-events: none;
  background:
    rgba(10, 10, 15, 0.5),
    repeating-linear-gradient(
      90deg,
      transparent 0px,
      transparent 60px,
      rgba(78, 78, 90, 0.06) 60px,
      rgba(78, 78, 90, 0.06) 62px
    ),
    radial-gradient(circle at 30% 20%, rgba(255, 182, 39, 0.03) 0%, transparent 40%),
    radial-gradient(circle at 70% 80%, rgba(92, 64, 51, 0.04) 0%, transparent 40%);
}

/* ------------------------------- Top Bar ----------------------------------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: linear-gradient(180deg, var(--bunker-panel) 0%, var(--bunker-dark) 100%);
  border-bottom: 2px solid var(--metal-rust);
  flex-wrap: wrap;
  justify-content: center;
  box-shadow: 0 2px 12px var(--card-shadow);
}

.game-title {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 800;
  color: var(--amber-glow);
  margin-right: auto;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-shadow: 0 0 12px rgba(255, 182, 39, 0.4);
}
.game-logo {
  height: 36px;
  width: auto;
  border-radius: 6px;
  box-shadow: 0 0 10px rgba(255, 182, 39, 0.3);
  flex-shrink: 0;
}

.btn-secondary {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 14px;
  background: var(--bunker-panel);
  color: var(--ghost-text);
  border: 1px solid var(--metal-sheen);
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: all 0.15s ease;
  min-height: 40px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-secondary:hover {
  border-color: var(--amber-dim);
  color: var(--amber-glow);
  box-shadow: 0 0 8px rgba(255, 182, 39, 0.2);
}

.btn-secondary:active {
  transform: scale(0.95);
}

.btn-secondary[aria-pressed="true"] {
  background: var(--amber-dim);
  color: var(--bunker-dark);
  border-color: var(--amber-glow);
}

/* ------------------------------- Shelter Layout ---------------------------- */
.shelter {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px 20px 32px;
}

/* ------------------------------- Day Counter ------------------------------- */
.day-counter {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 10px 20px;
  background: var(--bunker-panel);
  border: 1px solid var(--metal-sheen);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  box-shadow: inset 0 1px 4px rgba(0,0,0,0.3);
}

.day-counter-icon {
  font-size: 28px;
}

.day-counter-label {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--ghost-text);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.day-counter-value {
  font-family: var(--font-clock);
  font-size: 32px;
  font-weight: 800;
  color: var(--amber-glow);
  text-shadow: 0 0 10px rgba(255, 182, 39, 0.5);
}

.day-counter-score {
  font-family: var(--font-number);
  font-size: 16px;
  font-weight: 700;
  color: var(--supply-green);
  margin-left: auto;
}

/* ------------------------------- HUD (§4.1) -------------------------------- */
.hud {
  display: flex;
  gap: 12px;
  padding: 14px 18px;
  background: var(--bunker-panel);
  border: 2px solid var(--metal-rust);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  flex-wrap: wrap;
  justify-content: center;
  box-shadow: 0 2px 16px var(--card-shadow), inset 0 1px 4px rgba(0,0,0,0.3);
}

.resource-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 180px;
  padding: 6px 10px;
  border-radius: var(--radius-bar);
  background: var(--bunker-dark);
  border: 2px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.resource-bar.alert-warning {
  border-color: var(--warn-amber);
  box-shadow: 0 0 8px rgba(255, 152, 0, 0.3);
  animation: pulse-warn 0.8s ease-in-out infinite;
}

.resource-bar.alert-critical {
  border-color: var(--alert-red);
  background: rgba(229, 57, 53, 0.1);
  box-shadow: 0 0 12px rgba(229, 57, 53, 0.5);
  animation: pulse-crit 0.35s ease-in-out infinite;
}

/* 连锁指示 */
.resource-bar.cascaded {
  border-color: var(--alert-red);
  box-shadow: 0 0 15px rgba(229, 57, 53, 0.6);
}

.resource-label {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  color: var(--ghost-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.bar-track {
  flex: 1;
  height: 12px;
  background: var(--bunker-dark);
  border: 1px solid var(--metal-sheen);
  border-radius: var(--radius-bar);
  overflow: hidden;
  min-width: 60px;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.5);
}

.bar-fill {
  height: 100%;
  border-radius: var(--radius-bar);
  transition: width 0.4s ease;
}

.bar-fill.supplies  { background: var(--supply-green); box-shadow: 0 0 6px rgba(76, 175, 80, 0.4); }
.bar-fill.water     { background: var(--water-cyan);   box-shadow: 0 0 6px rgba(0, 188, 212, 0.4); }
.bar-fill.airlock   { background: var(--airlock-orange);box-shadow: 0 0 6px rgba(255, 111, 0, 0.4); }
.bar-fill.food      { background: var(--food-lime);    box-shadow: 0 0 6px rgba(139, 195, 74, 0.4); }

.bar-fill.bar-gain { animation: bar-flash-gain 0.32s ease; }
.bar-fill.bar-loss { animation: bar-flash-loss 0.32s ease; }

.resource-value {
  font-family: var(--font-number);
  font-size: 18px;
  font-weight: 700;
  min-width: 40px;
  text-align: right;
  color: var(--amber-glow);
}

.resource-value.value-bump {
  animation: value-bump 0.22s ease;
}

/* ------------------------------- Room Buttons ------------------------------ */
.rooms {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.room-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 16px;
  background: linear-gradient(135deg, var(--bunker-panel) 0%, var(--bunker-dark) 100%);
  border: 2px solid var(--metal-rust);
  border-radius: var(--radius-card);
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  color: var(--ghost-text);
  position: relative;
  overflow: hidden;
  min-height: 130px;
}

/* 警告状态的房间闪烁 */
.room-btn.alert {
  border-color: var(--alert-red);
  box-shadow: 0 0 16px rgba(229, 57, 53, 0.4);
  animation: room-alert 0.6s ease-in-out infinite;
}

@keyframes room-alert {
  0%, 100% { border-color: var(--alert-red); }
  50% { border-color: var(--warn-amber); }
}

.room-btn:hover {
  border-color: var(--amber-glow);
  box-shadow: 0 4px 20px rgba(255, 182, 39, 0.25);
  transform: translateY(-2px);
}

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

.room-icon {
  font-size: 40px;
  line-height: 1;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.4));
}

.room-name {
  font-size: 15px;
  font-weight: 800;
  color: var(--amber-glow);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.room-games {
  font-size: 12px;
  color: var(--ghost-text);
  text-align: center;
  line-height: 1.4;
}

/* 资源 badge */
.resource-badge {
  position: absolute;
  top: 6px;
  right: 8px;
  font-family: var(--font-number);
  font-size: 18px;
  font-weight: 700;
  background: rgba(0, 0, 0, 0.75);
  border: 1.5px solid var(--amber-dim);
  border-radius: 10px;
  padding: 2px 8px;
  color: var(--amber-glow);
  pointer-events: none;
  z-index: 2;
  white-space: nowrap;
}

/* 涟漪 */
.room-btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 182, 39, 0.2);
  transform: scale(0);
  animation: ripple-anim 0.5s ease-out;
  pointer-events: none;
}

@keyframes ripple-anim {
  to { transform: scale(2.5); opacity: 0; }
}

/* ------------------------------- Cascade Indicator ------------------------- */
.cascade-indicator {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 20px;
  margin-bottom: 16px;
  background: rgba(229, 57, 53, 0.15);
  border: 2px solid var(--alert-red);
  border-radius: var(--radius-card);
  box-shadow: 0 0 16px rgba(229, 57, 53, 0.3);
  animation: cascade-pulse 0.5s ease-in-out infinite;
}

.cascade-indicator.active {
  display: flex;
}

@keyframes cascade-pulse {
  0%, 100% { opacity: 0.85; }
  50% { opacity: 1; box-shadow: 0 0 24px rgba(229, 57, 53, 0.5); }
}

.cascade-icon {
  font-size: 22px;
  animation: cascade-rotate 1s linear infinite;
}

@keyframes cascade-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.cascade-text {
  font-family: var(--font-title);
  font-size: 14px;
  font-weight: 800;
  color: var(--alert-red);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

/* ------------------------------- Game Root --------------------------------- */
.game-root {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(14, 8, 20, 0.85);
  z-index: 50;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  gap: 8px;
}

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

.game-controls {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  width: min(880px, 96vw);
}

.game-root iframe {
  width: min(880px, 96vw);
  height: min(620px, 88vh);
  border: 2px solid var(--metal-rust);
  border-radius: var(--radius-modal);
  background: var(--bunker-dark);
  display: block;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.6);
}

.game-controls button {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  padding: 8px 16px;
  border: 1px solid var(--metal-sheen);
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: all 0.15s ease;
  background: var(--bunker-panel);
  color: var(--ghost-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  min-height: 40px;
}

.game-controls .btn-back-hub {
  background: var(--amber-dim);
  color: var(--bunker-dark);
  border-color: var(--amber-glow);
}

.game-controls button:hover {
  border-color: var(--amber-glow);
  box-shadow: 0 2px 12px rgba(255, 182, 39, 0.2);
  transform: translateY(-1px);
}

.game-controls button:active {
  transform: scale(0.92);
}

/* ------------------------------- Modal Frames ------------------------------ */
.modal-frame {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1000;
}

.modal-frame[hidden] { display: none; }

.gameover-content,
.gamewin-content {
  background: linear-gradient(135deg, var(--bunker-panel) 0%, var(--bunker-dark) 100%);
  border: 2px solid var(--metal-rust);
  border-radius: var(--radius-modal);
  padding: 32px 40px;
  text-align: center;
  max-width: 460px;
  width: 90%;
  box-shadow: 0 8px 40px var(--card-shadow);
  animation: modal-bounce 0.4s ease;
}

@keyframes modal-bounce {
  0% { transform: scale(0.7); opacity: 0; }
  60% { transform: scale(1.05); }
  100% { transform: scale(1); opacity: 1; }
}

.gameover-content { border-color: var(--alert-red); box-shadow: 0 0 40px rgba(229, 57, 53, 0.3); }

.gameover-content h2 {
  font-family: var(--font-title);
  font-size: 26px;
  color: var(--alert-red);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-shadow: 0 0 16px rgba(229, 57, 53, 0.5);
}

.gamewin-content h2 {
  font-family: var(--font-title);
  font-size: 26px;
  color: var(--supply-green);
  margin-bottom: 8px;
}

.modal-content p {
  color: var(--ghost-text);
  margin-bottom: 16px;
  font-size: 14px;
}

#gameover-reason {
  font-size: 15px;
  font-weight: 700;
  color: var(--amber-glow);
  margin-bottom: 16px;
  line-height: 1.5;
}

.gameover-stats,
.gamewin-stats {
  font-family: var(--font-number);
  font-size: 14px;
  color: var(--ghost-text);
  margin-bottom: 16px;
  line-height: 1.8;
}

.gameover-stats strong,
.g6-highlight {
  color: var(--amber-glow);
  font-weight: 800;
}

/* ------------------------------- Buttons ----------------------------------- */
.btn-primary {
  font-family: var(--font-title);
  font-size: 15px;
  font-weight: 800;
  padding: 12px 32px;
  background: linear-gradient(135deg, var(--amber-glow), var(--amber-dim));
  color: var(--bunker-dark);
  border: none;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: all 0.15s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
  min-height: 44px;
}

.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(255, 182, 39, 0.4);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: scale(0.95);
}

/* ------------------------------- Animations -------------------------------- */
@keyframes pulse-warn {
  0%, 100% { border-color: var(--warn-amber); }
  50% { border-color: var(--amber-glow); }
}

@keyframes pulse-crit {
  0%, 100% { border-color: var(--alert-red); }
  50% { border-color: var(--warn-amber); }
}

@keyframes value-bump {
  0% { transform: scale(1); }
  40% { transform: scale(1.3); }
  100% { transform: scale(1); }
}

@keyframes bar-flash-gain {
  0% { filter: brightness(1); }
  30% { filter: brightness(2); }
  100% { filter: brightness(1); }
}

@keyframes bar-flash-loss {
  0% { filter: brightness(1); }
  30% { filter: brightness(0.4); }
  100% { filter: brightness(1); }
}

/* ------------------------------- Screen Shake ------------------------------ */
body.shake {
  animation: shake 0.15s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* ------------------------------- 语言下拉 ---------------------------------- */
.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 6px;
  background: var(--bunker-panel);
  border: 1px solid var(--metal-sheen);
  border-radius: var(--radius-btn);
  padding: 4px 0;
  z-index: 500;
  min-width: 140px;
  box-shadow: 0 4px 16px var(--card-shadow);
}
.lang-dropdown[hidden] { display: none; }
.lang-dropdown button {
  display: block;
  width: 100%;
  padding: 10px 18px;
  background: transparent;
  color: var(--ghost-text);
  border: none;
  font-size: 14px;
  font-family: var(--font-body);
  cursor: pointer;
  text-align: left;
}
.lang-dropdown button:hover { background: var(--amber-dim); color: var(--bunker-dark); }
.lang-dropdown button.active { color: var(--amber-glow); font-weight: bold; }
.lang-wrapper { position: relative; display: inline-block; }

/* ------------------------------- 玩法说明彈窗 ------------------------------ */
.help-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 400;
  background: rgba(0,0,0,0.7);
}
.help-overlay[hidden] { display: none; }

.help-panel {
  background: linear-gradient(135deg, var(--bunker-panel) 0%, var(--bunker-dark) 100%);
  border: 2px solid var(--amber-dim);
  border-radius: var(--radius-modal);
  padding: 24px 28px;
  max-width: 520px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 8px 40px var(--card-shadow), 0 0 20px rgba(255, 182, 39, 0.15);
}
.help-panel h2 {
  font-family: var(--font-title);
  font-size: 18px;
  color: var(--amber-glow);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.help-panel p {
  font-size: 14px;
  color: var(--ghost-text);
  margin-bottom: 12px;
  line-height: 1.6;
}
.help-panel ul {
  list-style: none;
  padding: 0;
  margin-bottom: 16px;
}
.help-panel ul li {
  font-size: 13px;
  color: #B0B0C0;
  padding: 4px 0;
  line-height: 1.5;
}
.help-panel .btn-primary {
  display: block;
  margin: 0 auto;
}

/* ------------------------------- Responsive -------------------------------- */
@media (max-width: 640px) {
  .game-title { font-size: 18px; margin-right: 0; }
  .topbar { gap: 6px; padding: 8px 12px; }
  .hud { gap: 8px; padding: 10px 12px; }
  .resource-bar { min-width: 140px; }
  .rooms { grid-template-columns: repeat(2, 1fr); }
  .game-root iframe { height: min(480px, 88vh); }
  .game-controls { width: 96vw; }
  .room-btn { min-height: 100px; padding: 14px 10px; }
  .room-icon { font-size: 32px; }
}