/* ========== 游戏界面 ========== */
#screen-game, #screen-practice {
  display: none;
  padding: 0;
  height: 100vh;
  height: 100dvh;     /* 现代浏览器：动态 viewport，地址栏隐藏后自动占满 */
  overflow: hidden;
}
#screen-game.active, #screen-practice.active {
  display: grid;
  grid-template-rows: auto 1fr auto auto;  /* HUD / 画布 / 函数库 / 输入栏 */
}
#screen-practice.active {
  grid-template-rows: auto 1fr auto;  /* 头部 / 画布 / 输入栏 */
}

/* 顶部 HUD */
.game-hud-top {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px 24px;
  padding: 14px 80px 10px;
  background: linear-gradient(to bottom, var(--bg-deep), transparent);
  z-index: 10;
}
.hud-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 70px;
}

/* 小屏：HUD 更紧凑 */
@media (max-width: 600px) {
  .game-hud-top { gap: 12px; padding: 8px 60px 6px; }
  .hud-stat { min-width: 60px; }
  .hud-value { font-size: 18px; }
  .hud-label { font-size: 9px; }
  .input-bar { padding: 6px 12px 6px; }
  .library-bar { padding: 2px 12px 1px; }
  .lib-list { height: 26px; }
  .lib-item { font-size: 10px; padding: 1px 6px 1px 4px; gap: 4px; }
  #func-input, #practice-input { font-size: 12px; padding: 5px 10px; }
  .input-prompt { font-size: 18px; }
  .fire-btn { padding: 8px 14px; font-size: 12px; }
  .preset-btn { padding: 8px 8px; font-size: 13px; }
}

/* 极窄屏 */
@media (max-width: 420px) {
  .hud-stat { min-width: 0; }
  .lib-header { font-size: 9px; }
  .lib-hint { display: none; }
  .preset-menu { min-width: 200px; }
  .preset-section { grid-template-columns: repeat(4, 1fr); }
}
.hud-label {
  font-family: var(--font-orbitron);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 2px;
  margin-bottom: 2px;
  text-transform: uppercase;
}
.hud-value {
  font-family: var(--font-orbitron);
  font-size: 22px;
  font-weight: 900;
  color: var(--neon-cyan);
  text-shadow: 0 0 12px rgba(93, 255, 214, 0.6);
  line-height: 1;
}
.hud-value.combo {
  color: var(--neon-orange);
  text-shadow: 0 0 12px rgba(255, 170, 51, 0.6);
}
.hud-value.combo.boost {
  animation: comboBoost 0.4s;
}
@keyframes comboBoost {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.4); }
}
.hud-value.lives {
  color: var(--neon-pink);
  font-family: var(--font-body);
  font-size: 18px;
  text-shadow: 0 0 12px rgba(255, 85, 119, 0.6);
}
.hud-value.ammo {
  color: var(--neon-yellow);
}

/* 主画布 */
#game-canvas, #practice-canvas {
  width: 100%;
  height: 100%;
  min-height: 200px;  /* 防止小屏完全被压缩 */
  display: block;
  background: linear-gradient(180deg, #050a14 0%, #0a1424 100%);
  cursor: grab;
}
#game-canvas:active, #practice-canvas:active {
  cursor: grabbing;
}

/* 暂停按钮 */
.pause-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  width: 44px;
  height: 44px;
  border-radius: 8px;
  color: var(--text-main);
  font-size: 18px;
  z-index: 50;
  backdrop-filter: blur(8px);
  transition: all 0.2s;
}
.pause-btn:hover {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
}

/* 重置视野按钮 */
.reset-view-btn {
  position: absolute;
  top: 16px;
  right: 70px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  width: 44px;
  height: 44px;
  border-radius: 8px;
  color: var(--text-main);
  font-size: 22px;
  z-index: 50;
  backdrop-filter: blur(8px);
  transition: all 0.2s;
  font-family: var(--font-mono);
  line-height: 1;
}
.reset-view-btn:hover {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  transform: rotate(90deg);
}

/* 输入栏（紧凑） */
.input-bar {
  background: linear-gradient(to top, var(--bg-deep), rgba(8, 17, 28, 0.7));
  padding: 8px 20px 8px;
  border-top: 1px solid var(--border-soft);
  position: relative;
  z-index: 5;
}

/* ============ 函数库栏（紧凑） ============ */
.library-bar {
  /* 已学函数 UI 已隐藏 —— 所有函数无个体冷却,统一改用全局 1 秒冷却 */
  display: none !important;
  background: linear-gradient(to bottom, transparent, rgba(8, 17, 28, 0.6));
  padding: 4px 20px 2px;
  z-index: 5;
}
.lib-header {
  max-width: 900px;
  margin: 0 auto 3px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  font-family: var(--font-orbitron);
  letter-spacing: 1px;
}
.lib-title {
  color: var(--neon-cyan);
  font-weight: 700;
}
.lib-hint {
  color: var(--text-dim);
  font-size: 9px;
}
.lib-list {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 2px;
  align-items: stretch;
  height: 28px;
}
.lib-empty {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-size: 10px;
  font-style: italic;
}

.lib-item {
  flex: 0 0 auto;
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  padding: 2px 8px 2px 6px;
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--neon-cyan);
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
  overflow: hidden;
  user-select: none;
  white-space: nowrap;
}
.lib-item:hover:not(.cooldown) {
  border-color: var(--neon-cyan);
  background: rgba(93, 255, 214, 0.1);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(93, 255, 214, 0.25);
}
.lib-item.cooldown {
  cursor: not-allowed;
  color: var(--text-dim);
  border-color: var(--border-soft);
}
.lib-item.cooldown:hover { transform: none; }
.lib-item.fired {
  animation: libFire 0.4s;
}
@keyframes libFire {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); background: rgba(255, 224, 102, 0.25); }
}

/* 解锁进度覆盖层（已积累的「不同函数次数」/3 比例从左往右填充） */
.lib-cooldown-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: rgba(93, 255, 214, 0.12);
  border-right: 2px solid rgba(93, 255, 214, 0.5);
  pointer-events: none;
  transition: width 0.25s ease;
}
/* 进度环 + 剩余次数数字（取代旧的「秒数文字」） */
.lib-ring {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  margin-left: 1px;
  flex: 0 0 auto;
  z-index: 2;
}
.lib-ring svg {
  position: absolute;
  inset: 0;
  overflow: visible;
}
.lib-ring-track {
  fill: none;
  stroke: rgba(255, 255, 255, 0.1);
  stroke-width: 2;
}
.lib-ring-bar {
  fill: none;
  stroke: var(--neon-pink);
  stroke-width: 2;
  stroke-linecap: round;
  transition: stroke-dasharray 0.25s ease;
  filter: drop-shadow(0 0 2px rgba(255, 85, 119, 0.6));
}
.lib-ring-num {
  position: relative;
  font-family: var(--font-orbitron);
  font-size: 8px;
  font-weight: 700;
  color: var(--neon-pink);
  line-height: 1;
}
.lib-prefix {
  font-size: 10px;
  color: var(--neon-yellow);
  font-weight: 400;
}
.lib-basic {
  font-size: 9px;
  margin-right: 1px;
  filter: drop-shadow(0 0 2px rgba(255, 224, 102, 0.6));
}
.lib-item.basic {
  border-color: rgba(255, 224, 102, 0.4);
  background: linear-gradient(135deg, rgba(255, 224, 102, 0.06), var(--bg-soft));
}
.lib-item.basic:hover {
  border-color: var(--neon-yellow);
  background: rgba(255, 224, 102, 0.12);
}
.lib-item.basic .lib-remove { display: none; }  /* 基础函数不可移除 */
.lib-remove {
  margin-left: 2px;
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1;
  padding: 0 3px;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s;
  z-index: 2;
  position: relative;
}
.lib-remove:hover {
  color: var(--neon-pink);
  background: rgba(255, 85, 119, 0.15);
}
.input-row {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 900px;
  margin: 0 auto;
}
.input-prompt {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--neon-yellow);
  text-shadow: 0 0 8px rgba(255, 224, 102, 0.5);
  flex: 0 0 auto;
  overflow: hidden;
  white-space: nowrap;
  max-width: 50px;
  opacity: 1;
  transition: max-width 0.18s ease, opacity 0.15s ease, margin 0.18s ease;
}
.input-prompt.hidden {
  max-width: 0;
  opacity: 0;
  margin: 0;
  padding: 0;
}
#func-input, #practice-input {
  flex: 1 1 auto;
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  padding: 6px 12px;
  border-radius: 6px;
  color: var(--neon-cyan);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.8px;
  transition: all 0.2s;
  outline: none;
}
#func-input:focus, #practice-input:focus {
  border-color: var(--neon-cyan);
  background: rgba(93, 255, 214, 0.05);
  box-shadow: 0 0 0 2px rgba(93, 255, 214, 0.2);
}
#func-input::placeholder, #practice-input::placeholder {
  color: var(--text-dim);
  font-weight: 400;
}
.fire-btn {
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
  color: var(--bg-deep);
  padding: 6px 14px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.8px;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(93, 255, 214, 0.3);
}
.fire-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  filter: brightness(1.15);
  box-shadow: 0 6px 16px rgba(93, 255, 214, 0.5);
}
.fire-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* 练习沙盒里仍以 .input-hints 平铺展示（主游戏改用 .preset-menu 下拉了） */
.input-hints {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  max-width: 900px;
  margin: 8px auto 0;
  align-items: center;
}

/* —— 预设函数下拉（input-row 右侧） —— */
.preset-wrap {
  position: relative;
  flex: 0 0 auto;
}
.preset-btn {
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  color: var(--text-soft);
  padding: 5px 8px;
  border-radius: 6px;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.preset-btn:hover, .preset-btn.open {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  background: rgba(93, 255, 214, 0.08);
}
.preset-caret {
  font-size: 10px;
  transition: transform 0.15s;
}
.preset-btn.open .preset-caret {
  transform: rotate(180deg);
}
.preset-menu {
  position: absolute;
  bottom: calc(100% + 6px);
  right: 0;
  background: var(--bg-deep);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
  z-index: 20;
  min-width: 240px;
}
.preset-menu.hidden {
  display: none;
}
.preset-section-title {
  font-family: var(--font-orbitron);
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-top: 2px;
  padding-left: 2px;
}
.preset-section-title:first-child { margin-top: 0; }
.preset-section {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}
.hint-tag {
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  padding: 6px 10px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-soft);
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
  text-align: center;
}
.hint-tag:hover {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  background: rgba(93, 255, 214, 0.1);
}
.hint-tag.geom {
  color: var(--neon-yellow);
  border-color: rgba(255, 224, 102, 0.3);
}
.hint-tag.geom:hover {
  border-color: var(--neon-yellow);
  background: rgba(255, 224, 102, 0.12);
  color: var(--neon-yellow);
}

/* —— 错误信息行（独立、紧凑） —— */
.error-row {
  max-width: 900px;
  margin: 4px auto 0;
  min-height: 14px;
  display: flex;
  align-items: center;
}
.error-msg {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--neon-pink);
}
.error-msg:empty { display: none; }

/* ============ 沙盒练习 ============ */
.practice-header {
  padding: 14px 16px 4px;
  text-align: center;
}
.practice-header .screen-title {
  margin: 28px 0 4px;
  font-size: 22px;
}
.practice-header .screen-sub {
  margin-bottom: 6px;
}

.practice-history {
  max-width: 900px;
  margin: 8px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.history-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-soft);
  padding: 4px 10px 4px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.history-item .swatch {
  width: 12px;
  height: 3px;
  border-radius: 2px;
}
.history-item .remove {
  color: var(--text-dim);
  margin-left: 4px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
}
.history-item .remove:hover { color: var(--neon-pink); }

/* 等级 HUD（含经验进度条） */
.hud-value.level {
  color: var(--neon-yellow);
  text-shadow: 0 0 12px rgba(255, 224, 102, 0.55);
}
.hud-exp-bar {
  margin-top: 4px;
  width: 60px;
  height: 3px;
  border-radius: 2px;
  background: rgba(255, 224, 102, 0.15);
  overflow: hidden;
}
.hud-exp-bar > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--neon-yellow), var(--neon-orange));
  border-radius: 2px;
  transition: width 0.25s ease;
  box-shadow: 0 0 8px rgba(255, 224, 102, 0.8);
}

/* connect 维持进度条 */
.hud-combo-bar {
  margin-top: 4px;
  width: 60px;
  height: 3px;
  border-radius: 2px;
  background: rgba(255, 170, 51, 0.15);
  overflow: hidden;
}
.hud-combo-bar > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--neon-orange), var(--neon-pink));
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(255, 170, 51, 0.7);
  transition: width 0.05s linear;
}


/* ============================================================
 * 手机竖屏轻量优化（不重构布局，仅紧凑 HUD + 防按钮被截）
 *   触发：窄屏 ≤ 600px 且 竖屏（高 > 宽）
 * ============================================================ */
@media (max-width: 600px) and (orientation: portrait) {
  /* HUD 顶部：从两行合并到一行能装多少装多少；超出再换行 */
  .game-hud-top {
    gap: 4px 10px;
    padding: 6px 50px 4px;
  }
  .hud-stat { min-width: 0; }
  .hud-label { font-size: 8px; margin-bottom: 0; letter-spacing: 0.5px; }
  .hud-value { font-size: 14px; }
  .hud-exp-bar, .hud-combo-bar { width: 40px; height: 2px; margin-top: 1px; }

  /* 退出 / 暂停 / 瞄准按钮缩小（竖屏空间紧） */
  .game-back-btn { padding: 4px 8px; font-size: 11px; }
  .game-pause-btn, .preset-btn { padding: 4px 8px; font-size: 11px; }

  /* 输入栏：发射按钮始终可见（之前会被截掉） */
  .input-bar {
    padding: 5px 8px;
    gap: 6px;
    flex-wrap: nowrap;       /* 不换行，按比例压 */
  }
  #func-input {
    font-size: 13px;
    padding: 5px 8px;
    min-width: 0;            /* 允许被压缩 */
    flex: 1 1 auto;
  }
  .fire-btn {
    padding: 6px 10px;
    font-size: 12px;
    flex: 0 0 auto;          /* 不被压缩 */
    white-space: nowrap;
  }
  .input-prompt { font-size: 16px; }

  /* 函数库栏紧凑 */
  .library-bar { padding: 1px 8px; }
  .lib-list { height: 22px; }
  .lib-item { font-size: 10px; padding: 1px 5px 1px 3px; gap: 3px; }
  .lib-header { font-size: 9px; }
  .lib-hint { display: none; }

  /* VIEW 重置浮窗：缩小避免遮挡 */
  .view-info { font-size: 10px; padding: 4px 8px; }

  /* canvas 取消最小高度限制，让 grid 1fr 充分扩展 */
  #game-canvas { min-height: 0; }
}

/* 极窄屏幕（< 380px）进一步压缩 */
@media (max-width: 380px) and (orientation: portrait) {
  .hud-exp-bar, .hud-combo-bar { display: none; }
  .hud-value { font-size: 13px; }
  .hud-label { font-size: 8px; }
}

/* ============================================================
 * 弹窗（图鉴 / 升级卡牌）：限高 + 滚动 + 防止按钮被截
 * ============================================================ */
@media (max-width: 600px) {
  /* 图鉴卡牌：把内容区限高，按钮永远可见 */
  #codex-overlay .codex-panel {
    max-height: 92dvh;
    max-height: 92vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  /* 升级卡牌面板：同样限高滚动 */
  .upgrade-panel {
    max-height: 92dvh;
    max-height: 92vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* 函数队列事件提示横幅 */
.event-banner {
  position: absolute;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  padding: 10px 24px;
  background: rgba(255, 102, 204, 0.15);
  border: 2px solid var(--neon-pink);
  border-radius: 12px;
  color: #fff;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 1px;
  box-shadow: 0 0 24px rgba(255, 102, 204, 0.5);
  animation: eventBannerPulse 1.2s ease-in-out infinite;
  white-space: nowrap;
  pointer-events: none;
}
.event-banner.hidden { display: none; }
.event-banner-icon { color: var(--neon-pink); margin-right: 8px; font-size: 20px; }
.event-banner-text b { color: var(--neon-yellow); font-size: 20px; }

@keyframes eventBannerPulse {
  0%, 100% { box-shadow: 0 0 24px rgba(255, 102, 204, 0.5); transform: translateX(-50%) scale(1); }
  50% { box-shadow: 0 0 36px rgba(255, 102, 204, 0.85); transform: translateX(-50%) scale(1.04); }
}

@media (max-width: 600px) {
  .event-banner { font-size: 14px; padding: 6px 14px; top: 60px; }
  .event-banner-text b { font-size: 16px; }
}