/* ========== 星际射击 样式表（零外部依赖） ========== */

:root {
  --main: #7c5cff;
  --cyan: #22d3ee;
  --pink: #ff5ca8;
  --orange: #ffb347;
  --panel: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.12);
  --text-dim: #aab1dd;
}

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

html,
body {
  height: 100%;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #e8ebff;
  background: radial-gradient(circle at 50% 30%, #171a3a, #0b0e20);
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
}

/* ---------- 顶部栏 ---------- */
.topbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 12, 28, 0.45);
}

.logo {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 6px;
  color: #ffffff;
  text-shadow: 0 0 12px rgba(124, 92, 255, 0.9), 0 0 32px rgba(124, 92, 255, 0.45);
}

.back-link {
  flex: 0 0 auto;
  color: #cdd3ff;
  text-decoration: none;
  font-size: 14px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.back-link:hover {
  color: var(--cyan);
  border-color: rgba(34, 211, 238, 0.55);
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
}

/* ---------- 游戏舞台 ---------- */
.stage {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}

#game {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

/* ---------- 抬头显示 ---------- */
.hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 5;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  pointer-events: none;
}

.hud-left,
.hud-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hud-left {
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.hud-item {
  font-size: 13px;
  color: var(--text-dim);
  white-space: nowrap;
}

.hud-item span {
  margin-left: 6px;
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  text-shadow: 0 0 10px rgba(34, 211, 238, 0.7);
}

.hud-item.small span {
  font-size: 15px;
  color: #c9bfff;
  text-shadow: 0 0 8px rgba(124, 92, 255, 0.7);
}

.hud-center {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}

.combo-tag {
  margin-top: 2px;
  padding: 5px 14px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--orange);
  border: 1px solid rgba(255, 179, 71, 0.5);
  border-radius: 999px;
  background: rgba(255, 179, 71, 0.08);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  text-shadow: 0 0 10px rgba(255, 179, 71, 0.8);
  white-space: nowrap;
}

.power-chip {
  font-size: 12px;
  font-weight: 700;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid;
  background: var(--panel);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  white-space: nowrap;
}

.power-chip b {
  font-size: 13px;
}

.power-chip.double {
  color: var(--cyan);
  border-color: rgba(34, 211, 238, 0.5);
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.18);
}

.power-chip.shield {
  color: #b9a8ff;
  border-color: rgba(124, 92, 255, 0.6);
  box-shadow: 0 0 14px rgba(124, 92, 255, 0.22);
}

.lives {
  display: flex;
  align-items: center;
  gap: 4px;
}

.lives svg {
  display: block;
}

.icon-btn {
  pointer-events: auto;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  color: #dfe3ff;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.icon-btn:hover {
  color: var(--cyan);
  border-color: rgba(34, 211, 238, 0.5);
}

/* ---------- 遮罩与面板 ---------- */
.overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(7, 9, 22, 0.55);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.panel {
  width: min(430px, 100%);
  padding: 30px 28px 32px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45), 0 0 46px rgba(124, 92, 255, 0.16);
}

.panel-title {
  margin-bottom: 18px;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 8px;
  text-indent: 8px;
  color: #ffffff;
  text-shadow: 0 0 14px rgba(124, 92, 255, 0.95), 0 0 38px rgba(124, 92, 255, 0.5);
}

.intro {
  margin: 0 0 24px;
  list-style: none;
}

.intro li {
  position: relative;
  padding: 5px 0 5px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: #c3c9ef;
  text-align: left;
}

.intro li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 13px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

.tip {
  margin-bottom: 22px;
  font-size: 14px;
  color: var(--text-dim);
}

.result {
  margin: 6px 0 18px;
}

.result-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--text-dim);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.result-row span {
  font-size: 24px;
  font-weight: 800;
  color: #ffffff;
  text-shadow: 0 0 12px rgba(34, 211, 238, 0.65);
}

.record {
  margin-bottom: 20px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--orange);
  text-shadow: 0 0 12px rgba(255, 179, 71, 0.85);
}

/* ---------- 按钮 ---------- */
.btn {
  cursor: pointer;
  font-family: inherit;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 3px;
  text-indent: 3px;
  color: #ffffff;
  padding: 12px 40px;
  border-radius: 999px;
  border: 1px solid rgba(124, 92, 255, 0.75);
  background: linear-gradient(135deg, #7c5cff, #5638e0);
  box-shadow: 0 0 22px rgba(124, 92, 255, 0.45);
  transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.12);
  box-shadow: 0 0 30px rgba(124, 92, 255, 0.65), 0 0 12px rgba(34, 211, 238, 0.35);
}

.btn:active {
  transform: translateY(1px);
}

/* ---------- 底部说明 ---------- */
.footer {
  flex: 0 0 auto;
  padding: 11px 16px;
  text-align: center;
  font-size: 12.5px;
  color: #8e96c4;
  border-top: 1px solid var(--line);
  background: rgba(10, 12, 28, 0.45);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hidden {
  display: none !important;
}

/* ---------- 小屏适配 ---------- */
@media (max-width: 560px) {
  .topbar {
    padding: 10px 14px;
  }

  .logo {
    font-size: 17px;
    letter-spacing: 4px;
  }

  .back-link {
    font-size: 13px;
    padding: 7px 10px;
  }

  .hud {
    padding: 9px 10px;
    gap: 6px;
  }

  .hud-item span {
    font-size: 17px;
  }

  .hud-item.small span {
    font-size: 13px;
  }

  .combo-tag {
    font-size: 12px;
    padding: 4px 10px;
  }

  .power-chip {
    font-size: 11px;
    padding: 4px 8px;
  }

  .icon-btn {
    padding: 5px 10px;
    font-size: 12px;
  }

  .panel {
    padding: 24px 20px 26px;
  }

  .panel-title {
    font-size: 24px;
    letter-spacing: 6px;
    text-indent: 6px;
  }

  .intro li {
    font-size: 13px;
  }

  .footer {
    font-size: 10.5px;
    white-space: normal;
    line-height: 1.6;
  }
}