/* 华夏天空时间机器 - 样式 */
:root {
  --bg-deep: #0a0e17;
  --bg-panel: rgba(15, 20, 35, 0.92);
  --border: rgba(80, 120, 200, 0.25);
  --text-primary: #e0e6f0;
  --text-secondary: #8a9ab0;
  --accent: #4a9eff;
  --accent-glow: rgba(74, 158, 255, 0.3);
  --gold: #ffcc44;
  --danger: #ff6b6b;
}

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

html, body {
  width: 100%; min-height: 100%;
  overflow-x: hidden;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
}

#app { display: flex; height: 100vh; width: 100vw; }

/* ─── 顶部栏(极简) ─── */
#top-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center;
  padding: 8px 24px;
  background: linear-gradient(180deg, rgba(10,14,23,0.95) 0%, transparent 100%);
  pointer-events: none;
}
#top-bar > * { pointer-events: auto; }

.brand { display: flex; align-items: center; gap: 10px; }
.logo { font-size: 26px; color: var(--accent); text-shadow: 0 0 14px var(--accent-glow); }
h1 { font-size: 17px; font-weight: 500; letter-spacing: 2px; }

/* ─── 3D/2D 视图切换 tag(左下角) ─── */
.view-tag {
  position: absolute; bottom: 14px; left: 14px; z-index: 50;
  padding: 6px 14px; border-radius: 16px;
  background: rgba(20,30,50,0.75); color: var(--text-secondary);
  border: 1px solid var(--border); font-size: 13px; cursor: pointer;
  backdrop-filter: blur(8px); transition: all 0.2s;
}
.view-tag:hover { background: rgba(40,60,90,0.85); color: var(--text-primary); border-color: var(--accent); }

/* ─── 模式徽章(侧栏底部) ─── */
.mode-section { text-align: center; padding-top: 8px; border-top: 1px solid var(--border); }
.badge {
  display: inline-block; padding: 4px 12px; border-radius: 12px; font-size: 12px;
  background: rgba(74,158,255,0.15); color: var(--accent);
  border: 1px solid var(--border);
}
.badge.mode-ancient { background: rgba(255,204,68,0.15); color: var(--gold); border-color: rgba(255,204,68,0.3); }
.badge.mode-modern { background: rgba(74,158,255,0.15); color: var(--accent); }
.badge.mode-future { background: rgba(180,100,255,0.15); color: #b464ff; border-color: rgba(180,100,255,0.3); }

/* ─── 天球视口 ─── */
#sky-container, #canvas2d-container {
  flex: 1; position: relative;
  min-width: 0;
}
#sky-canvas, #canvas-2d { width: 100%; height: 100%; display: block; }

/* ─── 右下角水印 ─── */
#watermark-3d, #watermark-2d {
  position: absolute; bottom: 16px; right: 20px;
  display: flex; flex-direction: column; align-items: flex-end; gap: 2px;
  pointer-events: none; z-index: 10;
}
#watermark-3d span, #watermark-2d span {
  font-size: 13px; line-height: 1.5;
  color: rgba(224, 230, 240, 0.55);
  text-shadow: 0 1px 4px rgba(0,0,0,0.6);
  font-variant-numeric: tabular-nums;
}
#watermark-3d span:first-child, #watermark-2d span:first-child {
  color: rgba(255, 204, 68, 0.7);
}

/* ─── 横向日期条(侧栏内,左右滑动) ─── */
#date-strip-h {
  margin-bottom: 12px;
  border-radius: 8px;
  background: rgba(15,20,35,0.6);
  border: 1px solid var(--border);
  overflow: hidden;
}
#date-strip-viewport {
  width: 100%; height: 72px;
  overflow-x: auto; overflow-y: hidden;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
#date-strip-viewport::-webkit-scrollbar { display: none; }

.date-strip-inner {
  display: flex; flex-direction: row; align-items: center;
  gap: 2px; height: 100%;
  padding: 0 8px;
}

/* 单个日期项(横向) */
.ds-item {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 13px; line-height: 1.2;
  color: rgba(224, 230, 240, 0.45);
  padding: 8px 6px; border-radius: 6px;
  cursor: pointer; user-select: none;
  transition: all 0.15s;
  min-width: 32px; min-height: 56px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  letter-spacing: 1px;
  flex-shrink: 0;
}
.ds-item:hover { color: rgba(224, 230, 240, 0.8); background: rgba(74,158,255,0.08); }

/* 高亮选中项 */
.ds-item.active {
  color: #fff; font-size: 15px; font-weight: 600;
  background: linear-gradient(135deg, rgba(74,158,255,0.35), rgba(74,158,255,0.15));
  border: 1px solid rgba(74,158,255,0.5);
  box-shadow: 0 0 12px rgba(74,158,255,0.25);
  min-height: 64px;
}

/* 农历小字 */
.ds-item .ds-lunar {
  font-size: 9px; color: rgba(255,204,68,0.5);
  margin-top: 3px; letter-spacing: 1px;
}
.ds-item.active .ds-lunar { color: rgba(255,204,68,0.85); }

/* 月份分隔标记 */
.ds-month-label {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 10px; color: rgba(255,204,68,0.35);
  padding: 4px 2px; letter-spacing: 2px;
  user-select: none; flex-shrink: 0;
}

/* ─── 控制面板 ─── */
#control-panel {
  width: 320px; min-width: 280px;
  overflow-y: auto; padding: 60px 16px 16px;
  background: var(--bg-panel); border-left: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.panel-section { margin-bottom: 20px; }
.panel-section h3 {
  font-size: 12px; text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--text-secondary); margin-bottom: 10px;
  padding-bottom: 6px; border-bottom: 1px solid var(--border);
}

/* 时间输入 */
.time-inputs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-bottom: 8px; }
.time-inputs select {
  width: 100%; padding: 6px 8px; border-radius: 6px;
  background: #1a2235; border: 1px solid var(--border);
  color: var(--text-primary); font-size: 13px; text-align: center;
  appearance: none; -webkit-appearance: none;
}
.time-inputs select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 6px var(--accent-glow); }

/* 地点输入 */
.location-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 8px; }
.location-inputs select {
  width: 100%; padding: 6px 8px; border-radius: 6px;
  background: #1a2235; border: 1px solid var(--border);
  color: var(--text-primary); font-size: 13px;
  appearance: none; -webkit-appearance: none;
}
.location-inputs select:focus { outline: none; border-color: var(--accent); }

/* 所有 select 的 option(下拉项)统一深色 */
select option { background: #1a2235; color: var(--text-primary); }

.latlon-inputs { display: flex; gap: 8px; margin-bottom: 8px; }
.latlon-inputs label { flex: 1; font-size: 12px; color: var(--text-secondary); }
.latlon-inputs input {
  width: 100%; padding: 5px 8px; border-radius: 6px; margin-top: 3px;
  background: rgba(255,255,255,0.05); border: 1px solid var(--border);
  color: var(--text-primary); font-size: 13px;
}
.latlon-inputs input:focus { outline: none; border-color: var(--accent); }

/* 按钮 */
.btn-primary, .btn-secondary {
  width: 100%; padding: 8px; border-radius: 6px; cursor: pointer;
  font-size: 13px; font-weight: 500; transition: all 0.2s; margin-top: 4px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #2a6fd4);
  color: white; border: none;
}
.btn-primary:hover { box-shadow: 0 0 16px var(--accent-glow); transform: translateY(-1px); }
.btn-secondary {
  background: rgba(255,255,255,0.08); color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: rgba(255,255,255,0.12); }

/* 开关行 */
.toggle-row {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 0; cursor: pointer; font-size: 13px; color: var(--text-primary);
}
.toggle-row input[type="checkbox"] {
  width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer;
}

/* 信息块 */
.info-block { font-size: 12px; line-height: 1.8; color: var(--text-secondary); }
.info-block b { color: var(--text-primary); }

/* ─── 响应式 ─── */
@media (max-width: 768px) {
  #app { flex-direction: column; height: auto; min-height: 100vh; }
  #sky-container, #canvas2d-container { flex: none; height: 55vh; }
  #control-panel { width: 100%; min-width: unset; max-height: none; border-left: none; border-top: 1px solid var(--border); }
}

/* ─── 滚动条 ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(80,120,200,0.3); border-radius: 3px; }