/* ============================================================================
 * 《正步节奏大师》样式表
 * 主题：军营迷彩绿 + 阅兵金，深色底 + 玻璃拟态面板
 * 布局：上半部分 Canvas 舞台，下半部分实体按键区；所有界面层用绝对定位覆盖
 * ==========================================================================*/

/* ------------------------------ 全局变量 ------------------------------ */
:root {
  --bg-deep: #070d0a;
  --bg: #0b1410;
  --bg-soft: #12211a;
  --line: rgba(255, 255, 255, 0.08);
  --text: #e9f5ee;
  --text-dim: #9db4a7;
  --green: #5ef08e;
  --green-deep: #1f5a37;
  --blue: #4fd2ff;
  --gold: #ffd24d;
  --gold-deep: #b8860b;
  --purple: #c79bff;
  --red: #ff6b5e;
  --radius: 16px;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.55);
  --pad-h: 118px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg-deep);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  user-select: none;
  -webkit-user-select: none;
}

body {
  /* 背景兜底光效：即使 Canvas 未加载也不至于一片死黑 */
  background:
    radial-gradient(1200px 600px at 50% -10%, #1d3a2b 0%, transparent 60%),
    radial-gradient(900px 500px at 90% 110%, #2a2412 0%, transparent 55%),
    var(--bg-deep);
}

#app {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100dvh;
  height: 100vh; /* 旧浏览器回退 */
  touch-action: manipulation;
}

/* ------------------------------ 舞台区 ------------------------------ */
.playfield {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}

#stage {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* ------------------------------ 顶部 HUD ------------------------------ */
.hud {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: calc(8px + env(safe-area-inset-top)) 12px 0;
  pointer-events: none;
  z-index: 6;
}

.hud-left, .hud-right { display: flex; gap: 8px; }
.hud-right { flex-direction: column; align-items: flex-end; }

.hud-chip {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 12px;
  background: rgba(9, 20, 14, 0.62);
  border: 1px solid var(--line);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.hud-chip.small { padding: 4px 10px; }
.hud-label { font-size: 11px; color: var(--text-dim); letter-spacing: 1px; white-space: nowrap; }
.hud-chip strong { font-size: 20px; font-variant-numeric: tabular-nums; color: var(--green); white-space: nowrap; }
.hud-chip.small strong { font-size: 14px; color: var(--gold); }
#ui-combo-chip.hot { animation: comboPop 0.35s ease; border-color: rgba(94, 240, 142, 0.5); }
@keyframes comboPop {
  0% { transform: scale(1); }
  45% { transform: scale(1.16); }
  100% { transform: scale(1); }
}

.hud-center { flex: 1 1 auto; max-width: 460px; margin: 2px auto 0; }
.hud-label-row {
  display: flex; justify-content: space-between;
  font-size: 11px; color: var(--text-dim); letter-spacing: 1px;
  margin-bottom: 5px;
}
.hud-label-row span { white-space: nowrap; }
.uniform-track {
  position: relative;
  height: 14px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid var(--line);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6);
}
.uniform-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 65%;
  border-radius: 999px;
  background: linear-gradient(90deg, #2f8f57, var(--green) 70%, #d6ffe6);
  box-shadow: 0 0 14px rgba(94, 240, 142, 0.6);
  transition: width 0.18s linear, background 0.3s;
}
.uniform-glow {
  position: absolute; inset: 0;
  border-radius: 999px;
  opacity: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.85), transparent);
  mix-blend-mode: overlay;
}
.uniform-track.full .uniform-glow { opacity: 1; animation: sweep 1.1s linear infinite; }
.uniform-track.danger .uniform-fill { background: linear-gradient(90deg, #7a1f1f, var(--red)); box-shadow: 0 0 14px rgba(255, 107, 94, 0.7); }
@keyframes sweep { from { transform: translateX(-100%); } to { transform: translateX(100%); } }

/* ------------------------------ 教官口令横幅 ------------------------------ */
.shout {
  position: absolute;
  top: 19%; left: 50%;
  transform: translateX(-50%);
  padding: 8px 20px 11px;
  border-radius: 20px;
  text-align: center;
  pointer-events: none;
  z-index: 5;
  background: rgba(5, 14, 10, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.35);
  transition: opacity 0.25s;
}
.shout-tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 3px;
  color: #d9ffe8;
  background: rgba(31, 90, 55, 0.7);
  border: 1px solid rgba(94, 240, 142, 0.4);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 6px;
}
.shout-text {
  font-size: clamp(28px, 8vw, 46px);
  font-weight: 900;
  letter-spacing: 6px;
  color: #fff;
  text-shadow: 0 0 18px rgba(94, 240, 142, 0.75), 0 4px 0 rgba(0, 0, 0, 0.45);
  transition: transform 0.12s;
}
.shout-text.pop { animation: shoutPop 0.35s ease; }
.shout.urgent .shout-text { color: var(--gold); text-shadow: 0 0 22px rgba(255, 210, 77, 0.9), 0 4px 0 rgba(0, 0, 0, 0.45); }
.shout-sub { font-size: 12px; color: var(--text-dim); letter-spacing: 2px; margin-top: 4px; }
@keyframes shoutPop {
  0% { transform: scale(0.86); opacity: 0.4; }
  60% { transform: scale(1.06); opacity: 1; }
  100% { transform: scale(1); }
}

/* ------------------------------ 判定飘字 ------------------------------ */
.judge {
  position: absolute;
  left: 50%; top: 56%;
  transform: translate(-50%, -50%) scale(0.8);
  font-size: clamp(24px, 7vw, 40px);
  font-weight: 900;
  letter-spacing: 3px;
  opacity: 0;
  pointer-events: none;
  z-index: 7;
  text-shadow: 0 4px 14px rgba(0, 0, 0, 0.6);
}
.judge.show { animation: judgeFly 0.5s ease-out; }
@keyframes judgeFly {
  0% { opacity: 0; transform: translate(-50%, -40%) scale(0.7); }
  25% { opacity: 1; transform: translate(-50%, -50%) scale(1.12); }
  100% { opacity: 0; transform: translate(-50%, -78%) scale(1); }
}

.toast {
  position: absolute;
  left: 50%; bottom: 12%;
  transform: translateX(-50%);
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(122, 31, 31, 0.86);
  border: 1px solid rgba(255, 107, 94, 0.55);
  color: #ffe7e4;
  font-size: 13px;
  letter-spacing: 1px;
  opacity: 0;
  pointer-events: none;
  z-index: 7;
  white-space: nowrap;
}
.toast.show { animation: toastIn 1.6s ease forwards; }
@keyframes toastIn {
  0% { opacity: 0; transform: translate(-50%, 10px); }
  12% { opacity: 1; transform: translate(-50%, 0); }
  80% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -12px); }
}

/* ------------------------------ 阅兵式横幅 ------------------------------ */
.parade-banner {
  position: absolute;
  left: 50%; top: 46%;
  transform: translate(-50%, -50%) scale(0.6);
  text-align: center;
  opacity: 0;
  pointer-events: none;
  z-index: 6;
}
.parade-banner span {
  display: block;
  font-size: clamp(30px, 10vw, 58px);
  font-weight: 900;
  letter-spacing: 10px;
  background: linear-gradient(180deg, #fff6cf, var(--gold) 45%, #b8860b);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 18px rgba(255, 210, 77, 0.85));
}
.parade-banner small { font-size: 12px; letter-spacing: 3px; color: #ffeab5; }
.parade-banner.show { animation: paradeIn 2.4s ease forwards; }
@keyframes paradeIn {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.6) rotate(-4deg); }
  18% { opacity: 1; transform: translate(-50%, -50%) scale(1.08) rotate(1deg); }
  30% { transform: translate(-50%, -50%) scale(1) rotate(0); }
  78% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -60%) scale(1.04); }
}

/* ------------------------------ 暂停遮罩 ------------------------------ */
.pause-mask {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: rgba(5, 12, 9, 0.82);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.pause-mask h3 { font-size: 26px; margin: 0; letter-spacing: 4px; }
.pause-mask p { margin: 0 0 8px; color: var(--text-dim); font-size: 13px; }

/* ------------------------------ 底部按键区 ------------------------------ */
.pad {
  flex: 0 0 auto;
  padding: 8px 10px calc(10px + env(safe-area-inset-bottom));
  background: linear-gradient(180deg, rgba(8, 18, 13, 0.2), rgba(8, 18, 13, 0.95) 40%);
  border-top: 1px solid var(--line);
  z-index: 8;
}
.pad-hint {
  text-align: center;
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}
.pad-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }

.key {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  height: var(--pad-h);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  color: var(--text);
  font-family: inherit;
  cursor: pointer;
  transition: transform 0.06s, box-shadow 0.15s, background 0.15s;
  box-shadow: inset 0 -4px 0 rgba(0, 0, 0, 0.35);
  touch-action: none;
}
.key-glyph { font-size: 30px; font-weight: 900; line-height: 1; }
.key-name { font-size: 12px; color: var(--text-dim); letter-spacing: 2px; }
.key:active, .key.down { transform: translateY(2px) scale(0.98); }
.key-left   { color: var(--green);  border-color: rgba(94, 240, 142, 0.35); }
.key-right  { color: var(--blue);   border-color: rgba(79, 210, 255, 0.35); }
.key-salute { color: var(--gold);   border-color: rgba(255, 210, 77, 0.35); }
.key-turn   { color: var(--purple); border-color: rgba(199, 155, 255, 0.35); }
.key-left.down   { box-shadow: 0 0 22px rgba(94, 240, 142, 0.5), inset 0 -2px 0 rgba(0, 0, 0, 0.35); }
.key-right.down  { box-shadow: 0 0 22px rgba(79, 210, 255, 0.5), inset 0 -2px 0 rgba(0, 0, 0, 0.35); }
.key-salute.down { box-shadow: 0 0 22px rgba(255, 210, 77, 0.5), inset 0 -2px 0 rgba(0, 0, 0, 0.35); }
.key-turn.down   { box-shadow: 0 0 22px rgba(199, 155, 255, 0.5), inset 0 -2px 0 rgba(0, 0, 0, 0.35); }
.key.bad { animation: keyBad 0.35s ease; }
@keyframes keyBad {
  0%, 100% { background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02)); }
  50% { background: linear-gradient(180deg, rgba(255, 107, 94, 0.5), rgba(255, 107, 94, 0.15)); }
}

/* ------------------------------ 全屏界面（开始 / 结算） ------------------------------ */
.screen {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  overflow-y: auto;
  background:
    radial-gradient(700px 400px at 50% 0%, rgba(31, 90, 55, 0.5), transparent 70%),
    rgba(5, 12, 9, 0.955);
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
  animation: fadeIn 0.28s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.screen.hidden, .hidden { display: none !important; }

/* 打开任意全屏界面（开始 / 结算）时，把游戏内的 HUD、口令横幅与按键区淡出，
   避免与面板内容叠在一起显得杂乱；位置仍然保留，不会引起重排。 */
#app:has(.screen:not(.hidden)) .hud,
#app:has(.screen:not(.hidden)) .shout,
#app:has(.screen:not(.hidden)) .pad,
#app:has(.screen:not(.hidden)) .judge,
#app:has(.screen:not(.hidden)) .toast { opacity: 0; pointer-events: none; }
.hud, .shout, .pad, .judge, .toast { transition: opacity 0.3s ease; }

.panel {
  width: 100%;
  max-width: 520px;
  padding: 20px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(23, 43, 33, 0.96), rgba(11, 22, 17, 0.98));
  border: 1px solid rgba(94, 240, 142, 0.16);
  box-shadow: var(--shadow);
  animation: panelIn 0.35s cubic-bezier(0.2, 0.9, 0.3, 1.3);
}
.panel.wide { max-width: 560px; }
.panel.narrow { max-width: 400px; }
@keyframes panelIn {
  from { opacity: 0; transform: translateY(18px) scale(0.96); }
  to { opacity: 1; transform: none; }
}

.title-block { text-align: center; margin-bottom: 16px; }
.title-badge {
  display: inline-block;
  font-size: 11px; letter-spacing: 4px;
  color: var(--gold);
  border: 1px solid rgba(255, 210, 77, 0.35);
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 10px;
}
.title-block h1 {
  margin: 0;
  font-size: clamp(30px, 9vw, 44px);
  letter-spacing: 6px;
  background: linear-gradient(180deg, #ffffff, var(--green) 55%, #1f7a4a);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 20px rgba(94, 240, 142, 0.35));
}
.subtitle { margin: 8px 0 0; font-size: 13px; line-height: 1.7; color: var(--text-dim); }

/* 难度选择 */
.diff-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 16px 0; }
.diff {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 10px 6px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}
.diff strong { font-size: 14px; letter-spacing: 1px; }
.diff span { font-size: 10px; color: var(--text-dim); line-height: 1.3; }
.diff.active {
  border-color: rgba(94, 240, 142, 0.6);
  background: linear-gradient(180deg, rgba(94, 240, 142, 0.2), rgba(94, 240, 142, 0.05));
  box-shadow: 0 0 20px rgba(94, 240, 142, 0.22);
}
.diff.active strong { color: var(--green); }

/* 玩法说明 */
.howto { display: grid; gap: 7px; margin: 14px 0; }
.howto-item { display: flex; gap: 9px; align-items: flex-start; font-size: 12.5px; line-height: 1.55; color: #cfe3d7; }
.howto-item b { color: var(--green); font-size: 13px; }
.howto-item em { font-style: normal; color: var(--gold); }
.howto-item span b { color: var(--red); }

/* 开关按钮 */
.toggle-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.toggle {
  flex: 1 1 auto;
  padding: 9px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-dim);
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.18s;
}
.toggle.active { color: var(--green); border-color: rgba(94, 240, 142, 0.45); background: rgba(94, 240, 142, 0.1); }

.start-actions { display: flex; flex-direction: column; align-items: center; gap: 8px; margin-top: 14px; }
.best { font-size: 12px; color: var(--text-dim); }
.best strong { color: var(--gold); font-size: 15px; }
.tips { margin: 14px 0 0; font-size: 11px; color: #7e968a; text-align: center; line-height: 1.6; }

/* 按钮 */
.btn {
  padding: 11px 22px;
  border-radius: 14px;
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 2px;
  cursor: pointer;
  transition: transform 0.08s, box-shadow 0.2s, filter 0.2s;
}
.btn:active { transform: translateY(2px) scale(0.99); }
.btn.primary {
  color: #06210f;
  background: linear-gradient(180deg, #9dffc0, var(--green) 60%, #23a05f);
  box-shadow: 0 10px 24px rgba(35, 160, 95, 0.35);
}
.btn.primary:hover { filter: brightness(1.06); }
.btn.big { width: 100%; padding: 15px; font-size: 18px; letter-spacing: 6px; }
.btn.ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--line);
}

/* 结算界面 */
.over-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.over-head h2 { margin: 0; font-size: 20px; letter-spacing: 3px; }
.over-head p { margin: 4px 0 0; font-size: 12px; color: var(--text-dim); }
.over-grade {
  flex: 0 0 auto;
  width: 66px; height: 66px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 20px;
  font-size: 34px; font-weight: 900;
  color: #2a1f00;
  background: linear-gradient(180deg, #ffeaa0, var(--gold) 60%, #d19a10);
  box-shadow: 0 8px 22px rgba(255, 210, 77, 0.35);
}
.score-big {
  position: relative;
  text-align: center;
  padding: 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  margin-bottom: 12px;
}
.score-big strong {
  display: block;
  font-size: clamp(34px, 11vw, 52px);
  font-variant-numeric: tabular-nums;
  color: var(--green);
  text-shadow: 0 0 22px rgba(94, 240, 142, 0.45);
}
.new-record {
  position: absolute; right: 10px; top: 10px;
  font-size: 11px; color: #2a1f00;
  background: var(--gold);
  border-radius: 999px;
  padding: 3px 9px;
  animation: comboPop 0.6s ease infinite alternate;
}
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 14px; }
.stat {
  text-align: center;
  padding: 8px 4px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
}
.stat span { display: block; font-size: 10px; color: var(--text-dim); letter-spacing: 1px; }
.stat b { font-size: 17px; font-variant-numeric: tabular-nums; }
.stat:nth-child(2) b { color: var(--gold); }
.stat:nth-child(4) b { color: var(--red); }

.submit-row { display: flex; gap: 8px; margin-bottom: 6px; }
.input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.35);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  outline: none;
}
.input.short { flex: 0 0 84px; }
.input:focus { border-color: rgba(94, 240, 142, 0.55); }
.submit-msg { min-height: 16px; margin: 0 0 10px; font-size: 11.5px; color: var(--text-dim); }

.rank-box { margin-bottom: 14px; }
.rank-title { font-size: 11px; color: var(--text-dim); letter-spacing: 2px; margin-bottom: 6px; }
.rank-list {
  list-style: none;
  margin: 0; padding: 0;
  max-height: 168px;
  overflow-y: auto;
  display: grid;
  gap: 5px;
}
.rank-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  font-size: 12.5px;
}
.rank-list li .idx {
  flex: 0 0 22px;
  text-align: center;
  font-weight: 900;
  color: var(--text-dim);
}
.rank-list li:nth-child(1) .idx { color: var(--gold); }
.rank-list li:nth-child(2) .idx { color: #d8e3dc; }
.rank-list li:nth-child(3) .idx { color: #d29a6a; }
.rank-list li .who { flex: 1 1 auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rank-list li .who small { color: var(--text-dim); margin-left: 6px; font-size: 10.5px; }
.rank-list li .pts { font-variant-numeric: tabular-nums; color: var(--green); font-weight: 700; }
.rank-list li.empty { justify-content: center; color: var(--text-dim); }

.row { display: flex; gap: 8px; justify-content: center; }
.row .btn { flex: 1 1 auto; }

/* 排行榜弹层 */
.modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(4, 10, 7, 0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: fadeIn 0.2s ease;
}
.modal h2 { margin: 0 0 12px; font-size: 18px; letter-spacing: 4px; text-align: center; }
.modal .rank-list { max-height: 320px; margin-bottom: 14px; }

/* ------------------------------ 响应式与无障碍 ------------------------------ */
@media (max-height: 560px) {
  :root { --pad-h: 76px; }
  .pad-hint { display: none; }
  .key-glyph { font-size: 22px; }
  .shout { top: 12%; }
}
@media (max-width: 430px) {
  /* 窄屏手机上压缩 HUD，避免「得分 / 连击 / 阶段」这些标签被折成两行 */
  .hud { gap: 6px; padding-left: 8px; padding-right: 8px; }
  .hud-chip { padding: 4px 8px; gap: 4px; }
  .hud-chip.small { padding: 3px 7px; }
  .hud-label { font-size: 9.5px; letter-spacing: 0; }
  .hud-chip strong { font-size: 15px; }
  .hud-chip.small strong { font-size: 12px; }
  .hud-center { min-width: 92px; }
  .hud-label-row { font-size: 9.5px; letter-spacing: 0; }
  .uniform-track { height: 11px; }
}
@media (min-width: 720px) {
  .pad-row { max-width: 640px; margin: 0 auto; }
  :root { --pad-h: 132px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001s !important; }
}