/* ============================================================
   弹幕求生 — Bullet Storm
   Dark Neon Theme · Rajdhani + Orbitron
   ============================================================ */

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

:root {
  /* Palette */
  --bg-deep:       #0a0a0f;
  --bg-panel:      #12121a;
  --bg-card:       #1a1a28;
  --border-dim:    #2a2a3a;
  --border-glow:   #00f0ff;

  --cyan:          #00f0ff;
  --cyan-dim:      #0088aa;
  --magenta:       #ff00aa;
  --magenta-dim:   #aa0066;
  --yellow:        #ffdd00;
  --orange:        #ff6600;
  --red:           #ff2244;
  --green:         #00ff88;
  --purple:        #aa44ff;
  --blue:          #4488ff;

  --text-primary:  #e8e8f0;
  --text-secondary:#8888aa;
  --text-dim:      #555570;

  /* Bars */
  --hp-color:      #ff2244;
  --hp-glow:       rgba(255,34,68,.5);
  --exp-color:     #00f0ff;
  --exp-glow:      rgba(0,240,255,.4);
  --dodge-color:   #00ff88;
  --dodge-glow:    rgba(0,255,136,.4);

  /* Fonts */
  --font-main:     'Rajdhani', 'Microsoft YaHei', sans-serif;
  --font-display:  'Orbitron', 'Rajdhani', sans-serif;

  /* Sizes */
  --bar-height:    18px;
  --skill-size:    56px;
  --radius-sm:     4px;
  --radius-md:     8px;
  --radius-lg:     12px;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  user-select: none;
  cursor: crosshair;
}

/* ---------- Canvas ---------- */
#gameCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
}

/* ---------- Overlay Base ---------- */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(5, 5, 12, 0.88);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: opacity 0.3s ease;
}

.overlay.hidden {
  display: none !important;
}

.overlay-content {
  text-align: center;
  padding: 40px 60px;
  max-width: 90vw;
}

/* ---------- Glitch Title ---------- */
.game-title {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  color: var(--cyan);
  text-shadow:
    0 0 10px var(--cyan),
    0 0 30px rgba(0,240,255,.4),
    0 0 60px rgba(0,240,255,.2);
  position: relative;
  animation: titlePulse 2s ease-in-out infinite;
}

.game-title.glitch::before,
.game-title.glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.game-title.glitch::before {
  color: var(--magenta);
  clip-path: inset(10% 0 60% 0);
  animation: glitchTop 3s infinite linear alternate-reverse;
  z-index: -1;
}

.game-title.glitch::after {
  color: var(--green);
  clip-path: inset(60% 0 10% 0);
  animation: glitchBot 2.5s infinite linear alternate-reverse;
  z-index: -1;
}

@keyframes titlePulse {
  0%, 100% { text-shadow: 0 0 10px var(--cyan), 0 0 30px rgba(0,240,255,.4), 0 0 60px rgba(0,240,255,.2); }
  50%      { text-shadow: 0 0 15px var(--cyan), 0 0 45px rgba(0,240,255,.6), 0 0 90px rgba(0,240,255,.3); }
}

@keyframes glitchTop {
  0%   { transform: translate(0); }
  20%  { transform: translate(-3px, 2px); }
  40%  { transform: translate(2px, -1px); }
  60%  { transform: translate(-1px, 3px); }
  80%  { transform: translate(3px, -2px); }
  100% { transform: translate(0); }
}

@keyframes glitchBot {
  0%   { transform: translate(0); }
  20%  { transform: translate(3px, -2px); }
  40%  { transform: translate(-2px, 1px); }
  60%  { transform: translate(1px, -3px); }
  80%  { transform: translate(-3px, 2px); }
  100% { transform: translate(0); }
}

.game-subtitle {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.5em;
  color: var(--text-secondary);
  margin-top: 8px;
  margin-bottom: 40px;
}

/* ---------- Buttons ---------- */
.neon-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  border: 2px solid;
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}

.neon-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.2s;
}

.neon-btn:hover::before {
  opacity: 1;
}

.btn-primary {
  color: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 10px rgba(0,240,255,.2), inset 0 0 10px rgba(0,240,255,.05);
}
.btn-primary:hover {
  background: rgba(0,240,255,.1);
  box-shadow: 0 0 20px rgba(0,240,255,.4), inset 0 0 15px rgba(0,240,255,.1);
  transform: scale(1.03);
}
.btn-primary::before {
  background: linear-gradient(90deg, transparent, rgba(0,240,255,.1), transparent);
}

.btn-secondary {
  color: var(--text-secondary);
  border-color: var(--border-dim);
  box-shadow: 0 0 6px rgba(255,255,255,.05);
}
.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
  background: rgba(255,255,255,.05);
  box-shadow: 0 0 12px rgba(255,255,255,.1);
  transform: scale(1.03);
}

.btn-danger {
  color: var(--red);
  border-color: var(--red);
  box-shadow: 0 0 10px rgba(255,34,68,.15);
}
.btn-danger:hover {
  background: rgba(255,34,68,.1);
  box-shadow: 0 0 20px rgba(255,34,68,.3);
  transform: scale(1.03);
}

.btn-icon {
  font-size: 0.85em;
}

.start-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.controls-hint {
  margin-top: 36px;
  font-size: 0.9rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

.controls-hint .key {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--border-dim);
  border-radius: 3px;
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: rgba(255,255,255,.03);
}

/* 移动端操作提示默认隐藏 */
.mobile-hint {
  display: none;
}

/* ---------- Help Panel ---------- */
.help-content {
  background: var(--bg-panel);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 30px 50px;
  box-shadow: 0 0 40px rgba(0,0,0,.5);
}

.panel-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--cyan);
  margin-bottom: 24px;
  letter-spacing: 0.1em;
}

.help-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 40px;
  margin-bottom: 28px;
  text-align: left;
}

.help-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.help-key {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--yellow);
  background: rgba(255,221,0,.08);
  border: 1px solid rgba(255,221,0,.2);
  padding: 3px 10px;
  border-radius: 3px;
  min-width: 60px;
  text-align: center;
}

.help-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ==================== GAME HUD ==================== */
#gameHUD {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
}

#gameHUD.hidden {
  display: none;
}

/* Top HUD */
.hud-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 12px 20px;
  gap: 16px;
}

.hud-left {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 260px;
}

.hud-center {
  text-align: center;
}

.hud-right {
  display: flex;
  gap: 20px;
  min-width: 160px;
  justify-content: flex-end;
}

/* Bar containers */
.bar-container {
  display: flex;
  align-items: center;
  gap: 6px;
}

.bar-icon {
  font-size: 0.9rem;
  width: 18px;
  text-align: center;
  flex-shrink: 0;
}

.bar-hp .bar-icon { color: var(--hp-color); }
.bar-exp .bar-icon { color: var(--exp-color); }

.bar-track {
  flex: 1;
  height: var(--bar-height);
  background: rgba(255,255,255,.06);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(255,255,255,.08);
}

.bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.3s ease;
  position: relative;
}

.bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(to bottom, rgba(255,255,255,.25), transparent);
  border-radius: 2px 2px 0 0;
}

.hp-fill {
  background: linear-gradient(90deg, #cc1133, var(--hp-color));
  box-shadow: 0 0 8px var(--hp-glow);
}

.exp-fill {
  background: linear-gradient(90deg, #0088aa, var(--exp-color));
  box-shadow: 0 0 8px var(--exp-glow);
}

.bar-text {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--text-secondary);
  min-width: 50px;
  text-align: right;
  letter-spacing: 0.05em;
}

/* Timer & Wave */
.timer-display {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  text-shadow: 0 0 10px rgba(255,255,255,.2);
  letter-spacing: 0.1em;
}

.wave-display {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--magenta);
  letter-spacing: 0.15em;
  text-shadow: 0 0 8px rgba(255,0,170,.3);
  margin-top: 2px;
}

/* Stats */
.stat-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.stat-icon {
  font-size: 0.85rem;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

/* Bottom HUD */
.hud-bottom {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.skill-bar {
  display: flex;
  gap: 8px;
}

.skill-slot {
  width: var(--skill-size);
  height: var(--skill-size);
  background: rgba(20,20,30,.8);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.skill-slot:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(0,240,255,.2);
}

.skill-slot.ultimate {
  border-color: rgba(255,221,0,.3);
  width: calc(var(--skill-size) + 8px);
}

.skill-slot.ultimate:hover {
  border-color: var(--yellow);
  box-shadow: 0 0 12px rgba(255,221,0,.2);
}

.skill-key {
  position: absolute;
  top: 2px;
  left: 4px;
  font-family: var(--font-display);
  font-size: 0.6rem;
  color: var(--text-dim);
  z-index: 2;
}

.skill-icon {
  width: 60%;
  height: 60%;
  border-radius: 4px;
  background: rgba(255,255,255,.05);
}

.skill-cooldown {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.65);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--text-primary);
  opacity: 0;
  transition: opacity 0.1s;
  pointer-events: none;
}

.skill-cooldown.active {
  opacity: 1;
}

/* Dodge bar */
.dodge-bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.dodge-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--dodge-color);
  letter-spacing: 0.1em;
}

.dodge-track {
  width: 120px;
  height: 8px;
  background: rgba(255,255,255,.06);
  border-radius: 2px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.08);
}

.dodge-fill {
  height: 100%;
  width: 100%;
  background: var(--dodge-color);
  box-shadow: 0 0 6px var(--dodge-glow);
  border-radius: 2px;
  transition: width 0.15s ease;
}

/* Boss Warning */
.boss-warning {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 16px;
  animation: bossWarnPulse 0.8s ease-in-out infinite;
}

.boss-warning.hidden {
  display: none;
}

.warning-line {
  width: 120px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--red), transparent);
}

.warning-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--red);
  letter-spacing: 0.2em;
  text-shadow: 0 0 15px rgba(255,34,68,.6);
  white-space: nowrap;
}

@keyframes bossWarnPulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}

/* ==================== LEVEL-UP SCREEN ==================== */
.levelup-content {
  width: 700px;
  max-width: 95vw;
}

.levelup-title {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--yellow);
  letter-spacing: 0.2em;
  text-shadow: 0 0 20px rgba(255,221,0,.5), 0 0 40px rgba(255,221,0,.2);
  animation: levelUpPulse 1s ease-in-out infinite;
  margin-bottom: 4px;
}

@keyframes levelUpPulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.05); }
}

.new-level-text {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--cyan);
  letter-spacing: 0.15em;
  margin-bottom: 8px;
}

.choose-text {
  font-size: 1rem;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}

.skill-options {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Skill Card */
.skill-card {
  width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 20px 16px;
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
  pointer-events: auto;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--card-accent, var(--cyan));
  opacity: 0.7;
}

.skill-card:hover {
  border-color: var(--card-accent, var(--cyan));
  box-shadow: 0 0 25px color-mix(in srgb, var(--card-accent, var(--cyan)) 30%, transparent);
  transform: translateY(-4px);
}

.skill-card-icon {
  font-size: 2rem;
  margin-bottom: 10px;
  display: block;
}

.skill-card-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.skill-card-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.skill-card-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  padding: 2px 6px;
  border-radius: 2px;
  margin-top: 8px;
  background: rgba(255,255,255,.05);
  color: var(--text-dim);
}

/* Card rarity colors */
.card-common   { --card-accent: var(--cyan); }
.card-rare     { --card-accent: var(--blue); }
.card-epic     { --card-accent: var(--purple); }
.card-legendary{ --card-accent: var(--yellow); }

/* ==================== PAUSE SCREEN ==================== */
.pause-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.15em;
  margin-bottom: 32px;
}

.pause-buttons {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
}

/* ==================== GAME OVER SCREEN ==================== */
.gameover-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  margin-bottom: 24px;
}

.gameover-title.victory {
  color: var(--yellow);
  text-shadow: 0 0 20px rgba(255,221,0,.5);
}

.gameover-title.defeat {
  color: var(--red);
  text-shadow: 0 0 20px rgba(255,34,68,.5);
}

.stats-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 20px 40px;
  margin-bottom: 28px;
  min-width: 320px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,.04);
}

.stat-row:last-child {
  border-bottom: none;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.stat-val {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

.stat-val.score-highlight {
  color: var(--yellow);
  font-size: 1.2rem;
  text-shadow: 0 0 8px rgba(255,221,0,.3);
}

.gameover-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ==================== PARTICLES (DOM overlay) ==================== */
.damage-number {
  position: fixed;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--yellow);
  text-shadow: 0 0 6px rgba(255,221,0,.5);
  pointer-events: none;
  z-index: 50;
  animation: dmgFloat 0.8s ease-out forwards;
}

.damage-number.crit {
  font-size: 1.4rem;
  color: var(--red);
  text-shadow: 0 0 10px rgba(255,34,68,.6);
}

.damage-number.heal {
  color: var(--green);
  text-shadow: 0 0 6px rgba(0,255,136,.5);
}

@keyframes dmgFloat {
  0%   { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-40px) scale(0.8); }
}

/* ==================== SCANLINES EFFECT ==================== */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,.03) 2px,
    rgba(0,0,0,.03) 4px
  );
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  .game-title { font-size: 3rem; }
  .game-subtitle { font-size: 0.75rem; letter-spacing: 0.3em; }
  .hud-left { min-width: 180px; }
  .skill-slot { --skill-size: 44px; }
  .help-grid { grid-template-columns: 1fr; gap: 10px; }
  .skill-card { width: 150px; padding: 14px 10px; }
  .stats-panel { padding: 16px 24px; min-width: 260px; }

  /* HUD 元素放大 */
  .bar-container { gap: 8px; }
  .bar-track { height: 24px; }
  .bar-icon { font-size: 1.1rem; width: 22px; }
  .bar-text { font-size: 0.9rem; min-width: 55px; }
  .stat-value { font-size: 1.1rem; }
  .stat-icon { font-size: 1rem; }

  /* 开始/结束面板 */
  .overlay-content { padding: 24px 20px; }
  .start-buttons { gap: 12px; }
  .neon-btn { padding: 14px 28px; font-size: 0.95rem; min-height: 44px; }

  /* 升级面板 */
  .levelup-content { width: 95vw; padding: 20px 16px; }
  .levelup-title { font-size: 2rem; }
  .skill-options { gap: 10px; }
  .skill-card { width: 140px; padding: 12px 10px; }

  /* Boss 警告 */
  .warning-text { font-size: 1.1rem; letter-spacing: 0.1em; }
  .warning-line { width: 80px; }

  /* 隐藏桌面端操作提示，显示移动端提示 */
  .controls-hint:not(.mobile-hint) { display: none; }
  .mobile-hint { display: block !important; font-size: 0.85rem; }

  /* 暂停按钮 */
  .btn-pause { padding: 6px 12px !important; font-size: 0.75rem !important; min-height: 36px; }
}

@media (max-width: 480px) {
  /* 标题缩小 */
  .game-title { font-size: 2.2rem; letter-spacing: 0.1em; }
  .game-subtitle { font-size: 0.65rem; letter-spacing: 0.25em; margin-bottom: 24px; }

  /* HUD 进一步放大 */
  .hud-top { padding: 8px 12px; gap: 8px; }
  .hud-left { min-width: 140px; gap: 4px; }
  .hud-right { gap: 10px; min-width: auto; }
  .bar-track { height: 28px; }
  .bar-icon { font-size: 1.2rem; }
  .bar-text { font-size: 1rem; }
  .stat-value { font-size: 1.2rem; }
  .stat-item { gap: 3px; }

  /* 按钮增大触摸区域 */
  .neon-btn { padding: 16px 24px; font-size: 0.9rem; min-height: 48px; min-width: 44px; }
  .start-buttons { flex-direction: column; align-items: center; gap: 10px; }
  .start-buttons .neon-btn { width: 80%; max-width: 280px; justify-content: center; }

  /* 技能选择卡片改为单列全宽 */
  .skill-options { flex-direction: column; align-items: center; gap: 10px; }
  .skill-card { width: 100%; max-width: 320px; padding: 16px 20px; min-height: 44px; }
  .skill-card-icon { font-size: 1.6rem; margin-bottom: 6px; }
  .skill-card-name { font-size: 0.9rem; }
  .skill-card-desc { font-size: 0.75rem; }

  /* 升级面板 */
  .levelup-content { padding: 16px 12px; }
  .levelup-title { font-size: 1.6rem; }
  .new-level-text { font-size: 0.95rem; }
  .choose-text { font-size: 0.85rem; margin-bottom: 14px; }

  /* 游戏结束面板 */
  .gameover-title { font-size: 1.8rem; }
  .stats-panel { padding: 12px 16px; min-width: 220px; }
  .stat-label { font-size: 0.8rem; }
  .stat-val { font-size: 0.9rem; }
  .stat-val.score-highlight { font-size: 1.1rem; }
  .gameover-buttons { flex-direction: column; align-items: center; gap: 10px; }
  .gameover-buttons .neon-btn { width: 80%; max-width: 280px; justify-content: center; }

  /* Boss 警告文字缩小 */
  .warning-text { font-size: 0.9rem; letter-spacing: 0.08em; }
  .warning-line { width: 50px; }

  /* 帮助面板 */
  .help-content { padding: 20px 16px; }
  .help-grid { gap: 8px; }
  .help-key { font-size: 0.75rem; min-width: 50px; padding: 2px 6px; }
  .help-desc { font-size: 0.8rem; }
  .help-tip { font-size: 0.8rem; }

  /* 暂停按钮 */
  .btn-pause { padding: 4px 8px !important; font-size: 0.65rem !important; min-height: 32px; }

  /* Dodge bar */
  .dodge-track { width: 100px; height: 10px; }
}

/* 移动端触摸反馈 */
@media (hover: none) and (pointer: coarse) {
  .neon-btn:active { transform: scale(0.95); }
  .skill-card:active { transform: scale(0.97); border-color: var(--card-accent, var(--cyan)); }
}