:root {
  --bg: #0d1117;
  --bg-panel: #161b22;
  --bg-hover: #1f2630;
  --border: #2a3140;
  --text: #d9dee6;
  --text-dim: #8b949e;
  --accent: #5865f2;
  --accent2: #ff4d8f;
}

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

html,
body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
}

/* ---------- 顶部栏 ---------- */
.topbar {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.brand h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 1px;
}

.brand h1 span {
  color: var(--accent2);
}

.brand .subtitle {
  display: block;
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 2px;
  letter-spacing: 2px;
}

.controls {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

select,
input[type="text"] {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 13px;
  outline: none;
}

select:focus,
input[type="text"]:focus {
  border-color: var(--accent);
}

input[type="text"] {
  width: 140px;
}

.btn {
  border: none;
  border-radius: 6px;
  padding: 7px 16px;
  font-size: 13px;
  cursor: pointer;
  background: var(--bg-hover);
  color: var(--text);
}

.btn.primary {
  background: var(--accent);
  color: #fff;
}

.btn.primary:hover {
  filter: brightness(1.1);
}

.chips {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.chip {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}

.chip:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.toggles {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-left: auto;
}

.toggles label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
}

.toggles input[type="checkbox"] {
  accent-color: var(--accent);
  width: 13px;
  height: 13px;
  cursor: pointer;
}

/* ---------- 主体 ---------- */
main {
  flex: 1;
  position: relative;
  min-height: 0;
}

#chart {
  position: absolute;
  inset: 0;
}

/* 加载遮罩 */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(13, 17, 23, 0.6);
  z-index: 10;
  font-size: 13px;
  color: var(--text-dim);
}

.spinner {
  width: 26px;
  height: 26px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* 提示条 */
.toast {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: #4a1d24;
  color: #ffb4b4;
  border: 1px solid #7a2b36;
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 13px;
  z-index: 20;
  max-width: 80%;
}

/* 底部状态栏 */
.statusbar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 4px 10px;
  font-size: 11px;
  color: var(--text-dim);
  background: rgba(13, 17, 23, 0.8);
  border-top: 1px solid var(--border);
  pointer-events: none;
  z-index: 5;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hidden {
  display: none !important;
}