/* 黑马数据分析站 — 主题变量（浅色 / 深色） */
:root,
[data-theme="dark"] {
  color-scheme: dark;
  --bg-deep: #0b1220;
  --bg-base: #0f172a;
  --bg-panel: rgba(19, 28, 48, 0.96);
  --bg-card: rgba(255, 255, 255, 0.06);
  --bg-card-hover: rgba(255, 255, 255, 0.1);
  --sidebar-bg: rgba(11, 18, 32, 0.92);
  --topbar-bg: rgba(11, 18, 32, 0.72);
  --dropdown-bg: rgba(15, 23, 42, 0.98);
  --select-bg: #1a2332;
  --select-option-bg: #1e293b;
  --border: rgba(148, 163, 184, 0.14);
  --border-light: rgba(255, 255, 255, 0.08);
  --accent: #38bdf8;
  --accent2: #818cf8;
  --accent-glow: rgba(56, 189, 248, 0.35);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --shadow: 0 24px 48px rgba(0, 0, 0, 0.28);
  --nav-active-text: #fff;
  --nav-active-desc: rgba(255, 255, 255, 0.55);
  --app-bg-1: radial-gradient(ellipse 80% 60% at 100% 0%, rgba(2, 132, 199, 0.22), transparent 55%);
  --app-bg-2: radial-gradient(ellipse 70% 50% at 0% 100%, rgba(99, 102, 241, 0.18), transparent 50%);
  --app-bg-3: linear-gradient(160deg, #0b1220 0%, #0f172a 40%, #132337 100%);
  --dot-color: rgba(255, 255, 255, 0.04);
  --login-bg-1: #0f172a;
  --login-bg-2: #1e3a5f;
  --login-bg-mid: #0c4a6e;
  --login-glass: rgba(255, 255, 255, 0.08);
  --login-glass-border: rgba(255, 255, 255, 0.18);
  --login-panel: rgba(15, 23, 42, 0.75);
  --login-brand-bg: linear-gradient(160deg, rgba(56, 189, 248, 0.15), rgba(129, 140, 248, 0.12));
  --login-tabs-bg: rgba(0, 0, 0, 0.25);
  --login-input-bg: rgba(15, 23, 42, 0.6);
  --login-input-text: #fff;
  --login-label: #cbd5e1;
  --login-feature: #cbd5e1;
  --login-shell-shadow: 0 32px 64px rgba(0, 0, 0, 0.35);
  --login-blob-1: #0284c7;
  --login-blob-2: #6366f1;
  --login-blob-opacity: 0.45;
  --tag-bg: rgba(56, 189, 248, 0.12);
  --tag-border: rgba(56, 189, 248, 0.2);
  --empty-glow: rgba(56, 189, 248, 0.12);
  --empty-icon-bg: linear-gradient(145deg, rgba(56, 189, 248, 0.2), rgba(129, 140, 248, 0.15));
  --empty-icon-border: rgba(56, 189, 248, 0.25);
  --empty-icon-shadow: 0 16px 40px rgba(56, 189, 248, 0.15);
  --theme-switch-bg: rgba(255, 255, 255, 0.06);
  --theme-switch-border: rgba(148, 163, 184, 0.2);
  --theme-btn-color: #94a3b8;
  --theme-btn-active-bg: linear-gradient(135deg, rgba(56, 189, 248, 0.25), rgba(129, 140, 248, 0.2));
  --theme-btn-active-color: #fff;
}

[data-theme="light"] {
  color-scheme: light;
  --bg-deep: #f1f5f9;
  --bg-base: #ffffff;
  --bg-panel: rgba(255, 255, 255, 0.96);
  --bg-card: rgba(15, 23, 42, 0.04);
  --bg-card-hover: rgba(15, 23, 42, 0.07);
  --sidebar-bg: rgba(255, 255, 255, 0.92);
  --topbar-bg: rgba(255, 255, 255, 0.82);
  --dropdown-bg: rgba(255, 255, 255, 0.98);
  --select-bg: #f8fafc;
  --select-option-bg: #ffffff;
  --border: rgba(15, 23, 42, 0.1);
  --border-light: rgba(15, 23, 42, 0.08);
  --accent: #0284c7;
  --accent2: #4f46e5;
  --accent-glow: rgba(2, 132, 199, 0.25);
  --text: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  --shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
  --nav-active-text: #0c4a6e;
  --nav-active-desc: #0369a1;
  --app-bg-1: radial-gradient(ellipse 80% 60% at 100% 0%, rgba(56, 189, 248, 0.12), transparent 55%);
  --app-bg-2: radial-gradient(ellipse 70% 50% at 0% 100%, rgba(99, 102, 241, 0.08), transparent 50%);
  --app-bg-3: linear-gradient(160deg, #f8fafc 0%, #f1f5f9 40%, #e2e8f0 100%);
  --dot-color: rgba(15, 23, 42, 0.06);
  --login-bg-1: #f8fafc;
  --login-bg-2: #e0f2fe;
  --login-bg-mid: #bae6fd;
  --login-glass: rgba(255, 255, 255, 0.75);
  --login-glass-border: rgba(15, 23, 42, 0.08);
  --login-panel: rgba(255, 255, 255, 0.92);
  --login-brand-bg: linear-gradient(160deg, rgba(56, 189, 248, 0.12), rgba(129, 140, 248, 0.08));
  --login-tabs-bg: rgba(15, 23, 42, 0.05);
  --login-input-bg: #f8fafc;
  --login-input-text: #0f172a;
  --login-label: #334155;
  --login-feature: #475569;
  --login-shell-shadow: 0 24px 48px rgba(15, 23, 42, 0.1);
  --login-blob-1: #7dd3fc;
  --login-blob-2: #a5b4fc;
  --login-blob-opacity: 0.35;
  --tag-bg: rgba(2, 132, 199, 0.1);
  --tag-border: rgba(2, 132, 199, 0.2);
  --empty-glow: rgba(2, 132, 199, 0.1);
  --empty-icon-bg: linear-gradient(145deg, rgba(56, 189, 248, 0.15), rgba(129, 140, 248, 0.1));
  --empty-icon-border: rgba(2, 132, 199, 0.2);
  --empty-icon-shadow: 0 12px 32px rgba(2, 132, 199, 0.12);
  --theme-switch-bg: rgba(15, 23, 42, 0.04);
  --theme-switch-border: rgba(15, 23, 42, 0.1);
  --theme-btn-color: #64748b;
  --theme-btn-active-bg: linear-gradient(135deg, #0ea5e9, #6366f1);
  --theme-btn-active-color: #fff;
}

/* ── 主题切换器 ── */
.theme-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border-radius: 999px;
  background: var(--theme-switch-bg);
  border: 1px solid var(--theme-switch-border);
}

.theme-switch--floating {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 200;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.theme-btn {
  border: none;
  background: transparent;
  color: var(--theme-btn-color);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  line-height: 1.2;
  white-space: nowrap;
}

.theme-btn:hover {
  color: var(--text);
  background: var(--bg-card-hover);
}

.theme-btn.active {
  background: var(--theme-btn-active-bg);
  color: var(--theme-btn-active-color);
  box-shadow: 0 2px 10px var(--accent-glow);
}

[data-theme="light"] .nav-item.active a {
  color: var(--nav-active-text);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.14), rgba(129, 140, 248, 0.1));
}

[data-theme="light"] .nav-item.active .nav-desc {
  color: var(--nav-active-desc);
}

[data-theme="light"] .nav-item.active .nav-icon {
  color: #fff;
}

[data-theme="light"] .user-dropdown a:hover {
  background: rgba(239, 68, 68, 0.08);
  color: #dc2626;
}

/* ── 原生表单控件 · Layui 兼容 · 深色修复 ── */
html body {
  color: var(--text);
}

select,
textarea,
input:not([type="checkbox"]):not([type="radio"]):not([type="file"]) {
  color-scheme: inherit;
}

select option {
  background-color: var(--select-option-bg);
  color: var(--text);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-dim);
  opacity: 1;
}

input[type="checkbox"],
input[type="radio"],
.ck-check {
  accent-color: var(--accent);
}

[data-theme="dark"] input:-webkit-autofill,
[data-theme="dark"] input:-webkit-autofill:hover,
[data-theme="dark"] input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--text);
  -webkit-box-shadow: 0 0 0 1000px var(--select-bg) inset;
  caret-color: var(--text);
  transition: background-color 99999s ease-in-out 0s;
}

[data-theme="dark"] {
  scrollbar-color: rgba(148, 163, 184, 0.35) rgba(15, 23, 42, 0.5);
}

[data-theme="dark"] ::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

[data-theme="dark"] ::-webkit-scrollbar-track {
  background: rgba(15, 23, 42, 0.45);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.35);
  border-radius: 4px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
  background: rgba(148, 163, 184, 0.52);
}