:root,
html[data-theme="light"] {
    color-scheme: light;
    --bh-page-bg: #eef2f7;
    --bh-surface: #ffffff;
    --bh-surface-soft: #f8fafc;
    --bh-surface-muted: #f1f5f9;
    --bh-text: #111827;
    --bh-text-soft: #4b5563;
    --bh-muted: #94a3b8;
    --bh-line: #e5e7eb;
    --bh-reader-bg: #e8edf3;
    --bh-theme-accent: #2b6bff;
    --bh-theme-shadow: 0 12px 28px rgba(15, 23, 42, 0.18);
}

html[data-theme="dark"] {
    color-scheme: dark;
    --bh-page-bg: #090e16;
    --bh-surface: #111923;
    --bh-surface-soft: #17212d;
    --bh-surface-muted: #202c3a;
    --bh-text: #edf3fb;
    --bh-text-soft: #b8c4d4;
    --bh-muted: #8190a5;
    --bh-line: #2a3747;
    --bh-reader-bg: #05080d;
    --bh-theme-accent: #76a7ff;
    --bh-theme-shadow: 0 14px 34px rgba(0, 0, 0, 0.46);
}

.bh-theme-toggle {
    position: fixed;
    right: 12px;
    bottom: calc(78px + env(safe-area-inset-bottom));
    z-index: 10001;
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    margin: 0;
    padding: 0;
    overflow: hidden;
    border: 1px solid rgba(148, 163, 184, 0.34);
    border-radius: 50%;
    outline: 0;
    background: rgba(255, 255, 255, 0.94);
    color: #1f2937;
    box-shadow: var(--bh-theme-shadow);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: transform 160ms ease, background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

html[data-theme="dark"] .bh-theme-toggle {
    border-color: rgba(118, 167, 255, 0.42);
    background: rgba(23, 33, 45, 0.94);
    color: #f8d56b;
}

.bh-theme-toggle:hover {
    transform: translateY(-2px);
}

.bh-theme-toggle:active {
    transform: translateY(1px) scale(0.94);
}

.bh-theme-toggle:focus-visible {
    outline: 3px solid rgba(43, 107, 255, 0.3);
    outline-offset: 3px;
}

.bh-theme-toggle svg {
    display: block;
    width: 21px;
    height: 21px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.bh-theme-toggle__sun,
html[data-theme="dark"] .bh-theme-toggle__moon {
    display: none;
}

html[data-theme="dark"] .bh-theme-toggle__sun {
    display: block;
}

.bh-theme-toggle__sr {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

html[data-theme="dark"],
html[data-theme="dark"] body {
    background-color: var(--bh-page-bg) !important;
    color: var(--bh-text);
}

html[data-theme="dark"] .pc-wrapper,
html[data-theme="dark"] .modern-wrapper {
    background: var(--bh-surface) !important;
    color: var(--bh-text);
    box-shadow: 0 0 34px rgba(0, 0, 0, 0.5) !important;
}

html[data-theme="dark"] .pc-wrapper > header,
html[data-theme="dark"] .modern-wrapper > header,
html[data-theme="dark"] header[class*="bg-white"] {
    background: rgba(17, 25, 35, 0.96) !important;
    background-color: rgba(17, 25, 35, 0.96) !important;
    border-color: var(--bh-line) !important;
}

html[data-theme="dark"] .bg-white,
html[data-theme="dark"] [class~="bg-white/50"],
html[data-theme="dark"] [class~="bg-white/60"],
html[data-theme="dark"] [class~="bg-white/70"],
html[data-theme="dark"] [class~="bg-white/80"],
html[data-theme="dark"] [class~="bg-white/90"],
html[data-theme="dark"] [class~="bg-white/95"],
html[data-theme="dark"] .bg-gray-50,
html[data-theme="dark"] [class~="bg-gray-50/50"],
html[data-theme="dark"] [class~="bg-gray-50/60"],
html[data-theme="dark"] [class~="bg-gray-50/80"] {
    background-color: var(--bh-surface) !important;
}

html[data-theme="dark"] .bg-gray-100,
html[data-theme="dark"] .bg-slate-50,
html[data-theme="dark"] .bg-slate-100,
html[data-theme="dark"] [class*="bg-primary/5"],
html[data-theme="dark"] [class*="bg-primary/10"] {
    background-color: var(--bh-surface-soft) !important;
}

html[data-theme="dark"] .bg-blue-50,
html[data-theme="dark"] .bg-indigo-50,
html[data-theme="dark"] .bg-sky-50,
html[data-theme="dark"] .bg-green-50,
html[data-theme="dark"] .bg-emerald-50,
html[data-theme="dark"] .bg-amber-50,
html[data-theme="dark"] .bg-orange-50,
html[data-theme="dark"] .bg-red-50,
html[data-theme="dark"] .bg-rose-50 {
    background-color: rgba(43, 107, 255, 0.12) !important;
}

html[data-theme="dark"] .text-black,
html[data-theme="dark"] .text-gray-950,
html[data-theme="dark"] .text-gray-900,
html[data-theme="dark"] .text-gray-800,
html[data-theme="dark"] .text-gray-700,
html[data-theme="dark"] .text-slate-950,
html[data-theme="dark"] .text-slate-900,
html[data-theme="dark"] .text-slate-800,
html[data-theme="dark"] .text-slate-700 {
    color: var(--bh-text) !important;
}

html[data-theme="dark"] .text-gray-600,
html[data-theme="dark"] .text-gray-500,
html[data-theme="dark"] .text-gray-400,
html[data-theme="dark"] .text-slate-600,
html[data-theme="dark"] .text-slate-500,
html[data-theme="dark"] .text-slate-400,
html[data-theme="dark"] .text-muted {
    color: var(--bh-text-soft) !important;
}

html[data-theme="dark"] .border-gray-50,
html[data-theme="dark"] .border-gray-100,
html[data-theme="dark"] .border-gray-200,
html[data-theme="dark"] .border-gray-300,
html[data-theme="dark"] .border-slate-100,
html[data-theme="dark"] .border-slate-200,
html[data-theme="dark"] .divide-gray-100 > :not([hidden]) ~ :not([hidden]),
html[data-theme="dark"] .divide-gray-200 > :not([hidden]) ~ :not([hidden]) {
    border-color: var(--bh-line) !important;
}

html[data-theme="dark"] input:not([type="checkbox"]):not([type="radio"]),
html[data-theme="dark"] textarea,
html[data-theme="dark"] select {
    border-color: var(--bh-line) !important;
    background-color: var(--bh-surface-soft) !important;
    color: var(--bh-text) !important;
}

html[data-theme="dark"] input::placeholder,
html[data-theme="dark"] textarea::placeholder {
    color: var(--bh-muted) !important;
    opacity: 1;
}

html[data-theme="dark"] .glass-panel,
html[data-theme="dark"] .glass-header {
    border-color: rgba(148, 163, 184, 0.2) !important;
    background: rgba(17, 25, 35, 0.9) !important;
    color: var(--bh-text) !important;
}

/* Classic skin custom surfaces. These selectors intentionally stay behind
 * Classic-only semantic hooks so Aurora, Noir, and Mint keep their palettes. */
html[data-theme="dark"] .pc-wrapper .bm-box,
html[data-theme="dark"] .pc-wrapper .classic-summary-card,
html[data-theme="dark"] .pc-wrapper .classic-summary-body {
    border-color: var(--bh-line) !important;
    background: var(--bh-surface) !important;
    color: var(--bh-text-soft) !important;
    box-shadow: 0 14px 32px rgba(0, 0, 0, 0.22) !important;
}

html[data-theme="dark"] .pc-wrapper .more-btn,
html[data-theme="dark"] .pc-wrapper .module-action-btn-batch,
html[data-theme="dark"] .pc-wrapper .module-action-btn-disabled,
html[data-theme="dark"] .pc-wrapper .classic-summary-toggle,
html[data-theme="dark"] .pc-wrapper .classic-book-sort:not(.text-white),
html[data-theme="dark"] .pc-wrapper .classic-search-chip:not(.text-white),
html[data-theme="dark"] .pc-wrapper .classic-search-aux {
    border-color: var(--bh-line) !important;
    background: var(--bh-surface-soft) !important;
    color: var(--bh-text-soft) !important;
    box-shadow: none !important;
}

html[data-theme="dark"] .pc-wrapper .module-action-btn-more {
    border-color: rgba(118, 167, 255, 0.32) !important;
    background: rgba(118, 167, 255, 0.12) !important;
    color: var(--bh-theme-accent) !important;
}

html[data-theme="dark"] .pc-wrapper .chapter-chip,
html[data-theme="dark"] .pc-wrapper .chapter-chip-default {
    border-color: var(--bh-line) !important;
    background: var(--bh-surface-soft) !important;
    color: var(--bh-text-soft) !important;
}

html[data-theme="dark"] .pc-wrapper .chapter-chip:hover,
html[data-theme="dark"] .pc-wrapper .chapter-chip-default:hover {
    border-color: #405169 !important;
    background: var(--bh-surface-muted) !important;
}

html[data-theme="dark"] .pc-wrapper .chapter-chip-active {
    border-color: rgba(118, 167, 255, 0.42) !important;
    background: rgba(118, 167, 255, 0.14) !important;
    color: var(--bh-theme-accent) !important;
    box-shadow: 0 0 0 1px rgba(118, 167, 255, 0.12) !important;
}

html[data-theme="dark"] .pc-wrapper .classic-summary-fade {
    background: linear-gradient(180deg, rgba(17, 25, 35, 0), rgba(17, 25, 35, 1)) !important;
}

html[data-theme="dark"] .pc-wrapper .classic-status-badge--complete {
    border-color: var(--bh-line) !important;
    background: linear-gradient(180deg, var(--bh-surface-muted), var(--bh-surface-soft)) !important;
    color: var(--bh-text-soft) !important;
    box-shadow: none !important;
}

html[data-theme="dark"] .pc-wrapper .classic-search-header {
    border-color: var(--bh-line) !important;
    background: rgba(17, 25, 35, 0.96) !important;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18) !important;
}

html[data-theme="dark"] .pc-wrapper .classic-search-input {
    border-color: var(--bh-line) !important;
    background: var(--bh-surface-soft) !important;
    color: var(--bh-text) !important;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03) !important;
}

html[data-theme="dark"] .pc-wrapper .classic-search-filter-panel {
    border-color: var(--bh-line) !important;
    background: linear-gradient(180deg, var(--bh-surface-soft), var(--bh-surface)) !important;
    box-shadow: 0 18px 36px rgba(0, 0, 0, 0.2) !important;
}

html[data-theme="dark"] .pc-wrapper .classic-search-filter-section,
html[data-theme="dark"] .pc-wrapper .classic-search-sort-shell {
    border-color: var(--bh-line) !important;
    background: var(--bh-surface-soft) !important;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03) !important;
}

html[data-theme="dark"] .bh-ad-slot-item {
    border-color: var(--bh-line) !important;
    background: var(--bh-surface-soft) !important;
    box-shadow: none !important;
}

html[data-theme="dark"] .pc-wrapper .img-placeholder,
html[data-theme="dark"] .pc-wrapper .guess-cover,
html[data-theme="dark"] .pc-wrapper .classic-detail-cover {
    background: var(--bh-surface-muted) !important;
}

html[data-theme="dark"] #modernapi-loading {
    background: rgba(9, 14, 22, 0.72);
}

html[data-theme="dark"] #modernapi-loading .spinner {
    border-color: #334155;
    border-top-color: var(--bh-theme-accent);
}

html[data-theme="light"] .read-article,
html[data-theme="light"] #row,
html[data-theme="light"] .reader-content {
    background: var(--bh-reader-bg) !important;
}

html[data-theme="dark"] .read-article,
html[data-theme="dark"] #row,
html[data-theme="dark"] .reader-content {
    background: var(--bh-reader-bg) !important;
}

html[data-theme="dark"] .jiesuo .txt .title,
html[data-theme="dark"] .jiesuo .txt .title .con,
html[data-theme="dark"] .featured-reco-panel {
    background: var(--bh-surface) !important;
    color: var(--bh-text) !important;
}

html[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: #334155;
}

/* Tailwind's legacy pc-wrapper rules are layered utilities with !important.
 * Important declarations reverse layer priority, so the dark canvas override
 * belongs to the existing earlier base layer. */
@layer base {
    html[data-theme="dark"] .pc-wrapper,
    html[data-theme="dark"] .modern-wrapper,
    html[data-theme="dark"] body.pc-wrapper {
        background: var(--bh-surface) !important;
        color: var(--bh-text) !important;
        box-shadow: 0 0 34px rgba(0, 0, 0, 0.5) !important;
    }

    html[data-theme="dark"] .pc-wrapper > header,
    html[data-theme="dark"] .modern-wrapper > header,
    html[data-theme="dark"] body.pc-wrapper > header {
        background: rgba(17, 25, 35, 0.96) !important;
        background-color: rgba(17, 25, 35, 0.96) !important;
        border-color: var(--bh-line) !important;
    }
}

@media (max-width: 360px) {
    .bh-theme-toggle {
        width: 40px;
        height: 40px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .bh-theme-toggle {
        transition: none;
    }
}

@media print {
    .bh-theme-toggle {
        display: none !important;
    }
}