/* ===== LightsOut 统一毛玻璃样式 ===== */
@import url('https://fonts.googleapis.com/css2?family=Righteous&display=swap');

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

body {
    font-family: 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background:
        radial-gradient(at 50% 0, transparent, #080808),
        repeating-conic-gradient(
            hsla(0, 0%, 0%, .235) 0% 25%,
            transparent 0% 50%
        ) 0 0 / 0.375em 0.375em,
        #3b3b3b;
    background-attachment: fixed;
    min-height: 100vh;
    color: hsl(0 0% 90%);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
}

/* ===== Navbar (aligned with SRT2TXT/ExcelGrep) ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    width: 100%;
    align-self: stretch;
    background-color: rgba(0, 0, 0, 0.4);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px) saturate(1.2);
    -webkit-backdrop-filter: blur(12px) saturate(1.2);
}

.nav-content {
    max-width: 80rem;
    margin: 0 auto;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.logo-icon {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    object-fit: cover;
}

.logo-text-desktop {
    font-weight: 900;
    color: hsl(0 0% 95%);
    letter-spacing: 0.05em;
    font-size: 1.125rem;
    font-family: 'Righteous', 'Microsoft YaHei', sans-serif;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex: 1;
    justify-content: flex-end;
}

.nav-btn {
    -webkit-tap-highlight-color: #0000;
    cursor: pointer;
    border-radius: 12px;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    background: #0000;
    border: 1px solid #0000;
    position: relative;
    color: white;
    transition: translate 0.1s ease-out, scale 0.1s ease-out;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    text-decoration: none;
}

.nav-btn::before,
.nav-btn::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    pointer-events: none;
}

.nav-btn::before {
    z-index: -1;
    background: linear-gradient(
        hsl(0 0% 100% / 0.18),
        hsl(0 0% 4% / 0.7)
    );
    backdrop-filter: saturate(2) contrast(1) blur(10px);
}

.nav-btn::after {
    box-shadow: 0 0 1px 0.8px hsl(0 0% 100% / 0.8) inset;
    mask: linear-gradient(-35deg, #ffffff80, #ffffff30 30% 60%, #fff);
}

.nav-btn:active:not(:disabled) {
    scale: 0.98;
    translate: 0 1px;
}

.nav-btn:hover:not(:disabled) {
    scale: 1.02;
}

/* ===== Header 样式 ===== */
.header {
    text-align: center;
    padding: 2.5rem 1rem 1.5rem;
    position: relative;
}

.header h1 {
    display: inline-block;
    color: hsl(0 0% 90%);
    font-family: 'Righteous', 'Microsoft YaHei', serif;
    font-size: clamp(2rem, 5vw, 3rem);
    text-shadow: .03em .03em 0 hsla(230,40%,50%,1);
    position: relative;
    line-height: 1.2;
    margin-bottom: 0.8rem;
}

.header h1::after {
    content: attr(data-shadow);
    position: absolute;
    top: .06em;
    left: .06em;
    width: 100%;
    height: 100%;
    z-index: -1;
    text-shadow: none;
    background-image: linear-gradient(
        45deg,
        transparent 45%,
        hsla(48,20%,90%,1) 45%,
        hsla(48,20%,90%,1) 55%,
        transparent 0
    );
    background-size: .05em .05em;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    justify-content: center;
    align-items: center;
    white-space: nowrap;
    animation: shad-anim 60s linear infinite;
}

@keyframes shad-anim {
    0% { background-position: 0 0; }
    100% { background-position: 100% -100%; }
}

.description {
    color: hsl(0 0% 85%);
    font-size: 1.05rem;
    max-width: 700px;
    margin: 0 auto;
}


/* ===== 按钮统一样式 ===== */
.btn {
    -webkit-tap-highlight-color: #0000;
    cursor: pointer;
    border-radius: 12px;
    padding: 0.7rem 1.4rem;
    font-size: 0.95rem;
    background: #0000;
    border: 1px solid #0000;
    position: relative;
    color: white;
    transition-property: translate, scale;
    transition-duration: 0.1s;
    transition-timing-function: ease-out;
    text-decoration: none;
    display: inline-block;
    font-family: inherit;
    font-weight: 500;
}

.btn:active:not(:disabled) {
    scale: 0.98;
    translate: 0 1px;
}

.btn::before,
.btn::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    pointer-events: none;
}

.btn::before {
    z-index: -1;
    background: linear-gradient(
        hsl(0 0% 100% / 0.18),
        hsl(0 0% 4% / 0.7)
    );
    backdrop-filter: saturate(2) contrast(1) blur(10px);
}

.btn::after {
    box-shadow: 0 0 1px 0.8px hsl(0 0% 100% / 0.8) inset;
    mask: linear-gradient(-35deg, #ffffff80, #ffffff30 30% 60%, #fff);
}

.btn:hover:not(:disabled) {
    scale: 1.02;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary::before {
    background: linear-gradient(135deg, rgba(134, 239, 172, 0.9), rgba(74, 222, 128, 0.9));
}

.btn-primary:hover:not(:disabled)::before {
    background: linear-gradient(135deg, rgba(134, 239, 172, 1), rgba(74, 222, 128, 1));
}

.btn-primary:hover:not(:disabled) {
    box-shadow: 0 8px 20px rgba(74, 222, 128, 0.4);
}

.btn-secondary::before {
    background: linear-gradient(
        hsl(0 0% 100% / 0.12),
        hsl(0 0% 4% / 0.5)
    );
}

.btn-secondary:hover:not(:disabled)::before {
    background: linear-gradient(
        hsl(0 0% 100% / 0.18),
        hsl(0 0% 4% / 0.65)
    );
}

/* ===== Lights Out 游戏面板样式 ===== */
.fo-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem;
}

.navbar + .fo-container,
.navbar + .variant-container {
    padding-top: 1.5rem;
}

.fo-header {
    text-align: center;
    color: hsl(0 0% 95%);
    margin-bottom: 1.5rem;
}

.fo-header h1 {
    display: inline-block;
    color: hsl(0 0% 90%);
    font-family: 'Righteous', 'Microsoft YaHei', serif;
    font-size: clamp(2rem, 5vw, 2.8rem);
    text-shadow: .03em .03em 0 hsla(230,40%,50%,1);
    position: relative;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

.fo-header h1::after {
    content: attr(data-shadow);
    position: absolute;
    top: .06em;
    left: .06em;
    width: 100%;
    height: 100%;
    z-index: -1;
    text-shadow: none;
    background-image: linear-gradient(
        45deg,
        transparent 45%,
        hsla(48,20%,90%,1) 45%,
        hsla(48,20%,90%,1) 55%,
        transparent 0
    );
    background-size: .05em .05em;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    justify-content: center;
    align-items: center;
    white-space: nowrap;
    animation: shad-anim 60s linear infinite;
}

.fo-sub {
    color: hsl(0 0% 85%);
    font-size: 1rem;
}

.fo-panel {
    display: grid;
    grid-template-columns: max-content 1fr;
    align-items: start;
    gap: 1.5rem;
}

.fo-left {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 280px;
}

.fo-controls {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px) saturate(1.2);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1.2rem;
}

.fo-row {
    display: flex;
    gap: 0.6rem;
    align-items: center;
    margin-bottom: 0.8rem;
    flex-wrap: wrap;
}

.fo-row:last-child {
    margin-bottom: 0;
}

.fo-row label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: hsl(0 0% 90%);
    font-size: 0.95rem;
}

.fo-row input[type="number"],
.fo-row select {
    padding: 0.5rem 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    color: hsl(0 0% 90%);
    font-size: 0.9rem;
    outline: none;
    transition: all 0.3s;
}

.fo-row select option {
    background: #1e1e1e;
    color: hsl(0 0% 95%);
    padding: 8px;
}

.fo-row input[type="number"]:focus,
.fo-row select:focus {
    border-color: rgba(102, 126, 234, 0.5);
    background: rgba(255, 255, 255, 0.08);
}

.fo-btn {
    -webkit-tap-highlight-color: #0000;
    cursor: pointer;
    border-radius: 12px;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
    background: #0000;
    border: 1px solid #0000;
    position: relative;
    color: white;
    transition-property: translate, scale;
    transition-duration: 0.1s;
    transition-timing-function: ease-out;
    text-decoration: none;
    display: inline-block;
    font-family: inherit;
    font-weight: 500;
}

.is-hidden {
    display: none !important;
}

.fo-controls #variantBtn {
    margin-left: 8px;
}

.fo-btn:active:not(:disabled) {
    scale: 0.98;
    translate: 0 1px;
}

.fo-btn::before,
.fo-btn::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    pointer-events: none;
}

.fo-btn::before {
    z-index: -1;
    background: linear-gradient(
        hsl(0 0% 100% / 0.18),
        hsl(0 0% 4% / 0.7)
    );
    backdrop-filter: saturate(2) contrast(1) blur(10px);
}

.fo-btn::after {
    box-shadow: 0 0 1px 0.8px hsl(0 0% 100% / 0.8) inset;
    mask: linear-gradient(-35deg, #ffffff80, #ffffff30 30% 60%, #fff);
}

.fo-btn:hover:not(:disabled) {
    scale: 1.02;
}

.fo-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.fo-primary {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.8), rgba(118, 75, 162, 0.8));
    border-color: rgba(102, 126, 234, 0.3);
    color: white;
}

.fo-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.95), rgba(118, 75, 162, 0.95));
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

#customDone.fo-btn {
    background: linear-gradient(135deg, rgba(169, 159, 232, 0.8), rgba(194, 182, 243, 0.8));
    color: white;
}

#customDone.fo-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, rgba(169, 159, 232, 0.95), rgba(194, 182, 243, 0.95));
    box-shadow: 0 8px 20px rgba(169, 159, 232, 0.4);
}

.fo-stats {
    display: flex;
    gap: 1rem;
    margin-top: 0.8rem;
    color: hsl(0 0% 85%);
    flex-wrap: wrap;
    font-size: 0.9rem;
}

.fo-stats b {
    color: hsl(0 0% 95%);
}

.fo-board-wrap {
    background: transparent;
    padding: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.fo-board {
    --rows: 5;
    --cols: 5;
    --cell: 40px;
    display: grid;
    grid-template-rows: repeat(var(--rows), var(--cell));
    grid-template-columns: repeat(var(--cols), var(--cell));
    gap: 3px;
}

.fo-cell {
    width: var(--cell);
    height: var(--cell);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    font-weight: 700;
    color: hsl(0 0% 70%);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.9rem;
}

.fo-cell.on {
    background: linear-gradient(135deg, rgba(255, 212, 59, 0.9), rgba(255, 193, 7, 0.9));
    color: hsl(40 100% 30%);
    border-color: rgba(255, 212, 59, 0.5);
    box-shadow: 0 0 20px rgba(255, 212, 59, 0.4);
}

.fo-cell.hint {
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.9), rgba(233, 30, 99, 0.9));
    color: white;
    border-color: rgba(255, 107, 157, 0.5);
    box-shadow: 0 0 20px rgba(255, 107, 157, 0.4);
    animation: hintPulse 1.5s ease-in-out infinite;
}

@keyframes hintPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

.fo-cell:hover {
    transform: scale(1.05);
    border-color: rgba(255, 255, 255, 0.3);
}

.fo-cell:active {
    transform: scale(0.98);
}

.fo-help {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px) saturate(1.2);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1.2rem;
}

.fo-help details {
    color: hsl(0 0% 85%);
}

.fo-help summary {
    font-weight: 600;
    color: hsl(0 0% 95%);
    margin-bottom: 0.8rem;
    cursor: pointer;
    list-style: none;
    font-size: 1rem;
}

.fo-help summary::-webkit-details-marker {
    display: none;
}

.fo-help ul {
    list-style: none;
    padding-left: 0;
}

.fo-help ul li {
    margin: 0.5rem 0;
    padding-left: 1.2rem;
    position: relative;
    font-size: 0.9rem;
}

.fo-help ul li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: rgba(102, 126, 234, 0.8);
}

/* ===== 变体中心样式 ===== */
.variant-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    flex: 1 1 auto;
}

.variant-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.2rem;
    margin-top: 2rem;
}

.variant-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px) saturate(1.2);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.variant-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.variant-card h3 {
    margin: 0;
    color: hsl(0 0% 95%);
    font-size: 1.3rem;
}

.variant-card p {
    color: hsl(0 0% 80%);
    flex: 1;
    line-height: 1.6;
    font-size: 0.95rem;
}

.variant-card .fo-btn {
    width: 100%;
    text-align: center;
}

/* ===== 变体玩法样式 ===== */
.variant-colorful-page .fo-cell.hint-num {
    color: #1f2d3d;
    font-weight: 700;
    font-size: 0.95rem;
    text-shadow: 0 1px 0 rgba(255,255,255,0.6);
}

.variant-dec-page .fo-cell {
    color: hsl(0 0% 92%);
    font-weight: 700;
    font-size: 1.1rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

.variant-dec-page .fo-cell.hint-highlight {
    background: #ff6b9d !important;
    color: white !important;
    box-shadow: 0 0 10px rgba(255, 107, 157, 0.5);
}

.variant-diamond-page .fo-cell-placeholder {
    width: var(--cell-size, 40px);
    height: var(--cell-size, 40px);
    background: transparent;
    border: none;
    pointer-events: none;
}

.variant-diamond-page .diamond-layout {
    display: grid;
    place-items: center;
}

.variant-cube-page .cube-container {
    perspective: 1200px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 500px;
    margin: 20px 0;
    position: relative;
}

.variant-cube-page .cube {
    position: relative;
    --cube-size: 300px;
    width: var(--cube-size);
    height: var(--cube-size);
    transform-style: preserve-3d;
    cursor: grab;
    user-select: none;
    z-index: 1;
    transition: transform 0.12s ease-out;
}

.variant-cube-page .cube:active {
    cursor: grabbing;
}

.variant-cube-page .cube-hint {
    color: #666;
    font-size: 0.9rem;
    margin-left: 10px;
}

.variant-cube-page .cube-face {
    position: absolute;
    width: var(--cube-size);
    height: var(--cube-size);
    border: 1px solid #4a4a4a;
    background: #353535;
    border-radius: 16px;
    display: grid;
    gap: 2px;
    padding: 5px;
    backface-visibility: hidden;
}

.variant-cube-page .cube-face.front { transform: rotateY(0deg) translateZ(calc(var(--cube-size) / 2)); }
.variant-cube-page .cube-face.back { transform: rotateY(180deg) translateZ(calc(var(--cube-size) / 2)); }
.variant-cube-page .cube-face.right { transform: rotateY(90deg) translateZ(calc(var(--cube-size) / 2)); }
.variant-cube-page .cube-face.left { transform: rotateY(-90deg) translateZ(calc(var(--cube-size) / 2)); }
.variant-cube-page .cube-face.top { transform: rotateX(90deg) translateZ(calc(var(--cube-size) / 2)); }
.variant-cube-page .cube-face.bottom { transform: rotateX(-90deg) translateZ(calc(var(--cube-size) / 2)); }

.variant-polyhedron-page .polyhedron-container {
    perspective: 1200px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 500px;
    margin: 20px 0;
    position: relative;
}

.variant-polyhedron-page .polyhedron {
    position: relative;
    transform-style: preserve-3d;
    cursor: grab;
    user-select: none;
    transition: transform 0.1s ease;
}

.variant-polyhedron-page .polyhedron:active {
    cursor: grabbing;
}

.variant-polyhedron-page .polyhedron-hint {
    color: #666;
    font-size: 0.9rem;
    margin-left: 10px;
}

.variant-polyhedron-page .dimension-controls {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 10px;
}

.variant-polyhedron-page .polyhedron-face {
    position: absolute;
    border: 1px solid #4a4a4a;
    background: #353535;
    display: grid;
    gap: 2px;
    padding: 5px;
    box-sizing: border-box;
    border-radius: 16px;
    backface-visibility: hidden;
}

.variant-polyhedron-page .polyhedron-face.front { transform: rotateY(0deg) translateZ(var(--depth)); }
.variant-polyhedron-page .polyhedron-face.back { transform: rotateY(180deg) translateZ(var(--depth)); }
.variant-polyhedron-page .polyhedron-face.right { transform: rotateY(90deg) translateZ(var(--width)); }
.variant-polyhedron-page .polyhedron-face.left { transform: rotateY(-90deg) translateZ(var(--width)); }
.variant-polyhedron-page .polyhedron-face.top { transform: rotateX(90deg) translateZ(var(--height)); }
.variant-polyhedron-page .polyhedron-face.bottom { transform: rotateX(-90deg) translateZ(var(--height)); }

.variant-cube-page .cube-cell,
.variant-polyhedron-page .cube-cell {
    background: #404040;
    border: 1px solid #5a5a5a;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: all 0.2s ease;
    border-radius: 6px;
    color: #e6e6e6;
    box-shadow: none;
}

.variant-cube-page .cube-cell.on,
.variant-polyhedron-page .cube-cell.on {
    background: #d6d6d6;
    border-color: #b5b5b5;
    box-shadow: none;
}

.variant-cube-page .cube-cell.hint-highlight,
.variant-polyhedron-page .cube-cell.hint-highlight {
    background: #2f7fb0;
    border-color: #4fa0d1;
    color: #f2fbff;
    font-weight: 700;
    box-shadow: none;
}

.variant-cube-page .face-label,
.variant-polyhedron-page .face-label {
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-weight: bold;
    color: #dcdcdc;
}

.variant-cube-page .face-label {
    color: #dcdcdc;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.72rem;
    text-shadow: none;
}

.variant-cube-page .cube-cell {
    background: #404040;
    border: 1px solid #5a5a5a;
    border-radius: 6px;
    color: #e6e6e6;
    box-shadow: none;
}

.variant-cube-page .cube-cell:hover {
    border-color: #6b6b6b;
    background: #4a4a4a;
    box-shadow: none;
}

.variant-cube-page .cube-cell.on {
    background: #d6d6d6;
    border-color: #b5b5b5;
    box-shadow: none;
}

.variant-cube-page .cube-cell.hint-highlight {
    background: #2f7fb0;
    border-color: #4fa0d1;
    color: #f2fbff;
    box-shadow: none;
    font-weight: 700;
}

body.day-mode.variant-cube-page .cube-face {
    background: rgba(255, 255, 255, 0.92);
    border-color: #cbd5e0;
    box-shadow: none;
}

body.day-mode.variant-cube-page .face-label {
    color: #1f2937;
    text-shadow: none;
}

body.day-mode.variant-cube-page .cube-cell {
    background: #ffffff;
    border-color: #cbd5e0;
    color: #1f2937;
    box-shadow: none;
}

body.day-mode.variant-cube-page .cube-cell:hover {
    border-color: #a0aec0;
    background: #f7fafc;
}

body.day-mode.variant-cube-page .cube-cell.on {
    background: #ffd88a;
    border-color: #e8b454;
}

body.day-mode.variant-cube-page .cube-cell.hint-highlight {
    background: #c7ebff;
    border-color: #7fb6e8;
    color: #0f3b66;
}

body.day-mode.variant-polyhedron-page .polyhedron-face {
    background: rgba(255, 255, 255, 0.92);
    border-color: #cbd5e0;
    box-shadow: none;
}

body.day-mode.variant-polyhedron-page .cube-cell {
    background: #ffffff;
    border-color: #cbd5e0;
    color: #1f2937;
    box-shadow: none;
}

body.day-mode.variant-polyhedron-page .cube-cell:hover {
    border-color: #a0aec0;
    background: #f7fafc;
}

body.day-mode.variant-polyhedron-page .cube-cell.on {
    background: #ffd88a;
    border-color: #e8b454;
}

body.day-mode.variant-polyhedron-page .cube-cell.hint-highlight {
    background: #c7ebff;
    border-color: #7fb6e8;
    color: #0f3b66;
}

body.day-mode.variant-polyhedron-page .face-label {
    color: #1f2937;
    text-shadow: none;
}

.variant-pic-page .fo-board {
    --cell: 56px;
}

.variant-pic-page .pic-form .fo-row {
    gap: 16px;
    align-items: center;
}

.variant-pic-page .pic-form .inline {
    display: flex;
    align-items: center;
    gap: 8px;
}

.variant-pic-page .pic-form .inline input[type="number"] {
    width: 84px;
}

.variant-pic-page .pic-form .url-input {
    width: 340px;
    padding: 6px 10px;
    border-radius: 8px;
    border: 1px solid #dee2e6;
}

.variant-pic-page .pic-form .group {
    display: flex;
    gap: 18px;
    align-items: center;
}

.variant-pic-page .pic-form .group .left {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.variant-pic-page .pic-form .hint {
    color: #667085;
    font-size: 12px;
}

.variant-pic-page .fo-cell.pic {
    position: relative;
    overflow: hidden;
    background: transparent !important;
}

.variant-pic-page .fo-cell.pic .piece {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background-repeat: no-repeat;
    background-size: var(--bgW) var(--bgH);
    transform-origin: center center;
    transition: transform 120ms ease-out;
}

.variant-pic-page .fo-cell.pic.hint-num {
    color: var(--hintColor, #1f2d3d);
    font-weight: 700;
    font-size: 0.95rem;
    text-shadow: 0 1px 0 rgba(255,255,255,0.6);
}

.variant-pic-page .fo-cell.pic .hintText {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    background: var(--hintBg, transparent);
    border-radius: 6px;
    font-size: 1.2rem;
    font-weight: 800;
    line-height: 1;
}

.variant-pic-page .fo-preview {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    background-size: cover;
    background-position: center;
}

/* ===== 成功弹窗样式 ===== */
.success-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

.success-modal .modal-content {
    background: rgba(30, 30, 30, 0.95);
    backdrop-filter: blur(30px) saturate(1.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 2rem;
    width: min(90vw, 450px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    text-align: center;
}

.success-modal h3 {
    color: hsl(0 0% 95%);
    margin-bottom: 0.8rem;
    font-size: 1.5rem;
}

.success-modal p {
    color: hsl(0 0% 80%);
    margin: 0.8rem 0 1.5rem;
}

.modal-buttons {
    display: flex;
    gap: 0.8rem;
    justify-content: center;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ===== 异形图块特殊样式 ===== */
.hint-num {
    color: hsl(0 0% 95%);
    font-weight: 700;
    font-size: 1rem;
}

.alien-red {
    background: linear-gradient(145deg, rgba(247, 101, 101, 0.9), rgba(247, 101, 101, 0.8)) !important;
    color: hsl(0 0% 20%) !important;
    border-color: rgba(247, 101, 101, 0.5) !important;
}

.alien-green {
    background: linear-gradient(145deg, rgba(168, 216, 168, 0.9), rgba(153, 199, 153, 0.8)) !important;
    color: hsl(0 0% 20%) !important;
    border-color: rgba(153, 199, 153, 0.5) !important;
}

.alien-blue {
    background: linear-gradient(145deg, rgba(168, 200, 232, 0.9), rgba(153, 184, 214, 0.8)) !important;
    color: hsl(0 0% 20%) !important;
    border-color: rgba(153, 184, 214, 0.5) !important;
}

.alien-purple {
    background: linear-gradient(145deg, rgba(192, 132, 161, 0.9), rgba(168, 112, 138, 0.8)) !important;
    color: white !important;
    border-color: rgba(168, 112, 138, 0.5) !important;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .fo-panel {
        grid-template-columns: 1fr;
    }

    .fo-left {
        max-width: 600px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1.5rem 1rem 1rem;
    }

    .fo-board {
        --cell: 35px;
    }

    .variant-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .fo-board {
        --cell: 30px;
    }

    .fo-controls,
    .fo-help {
        padding: 1rem;
    }

    .fo-row {
        gap: 0.5rem;
    }

    .fo-btn {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 639px) {
    .nav-content {
        flex-direction: column;
        gap: 0.75rem;
        align-items: center;
        padding: 0.75rem 1rem;
    }

    .logo-wrapper {
        justify-content: center;
        width: 100%;
    }

    .nav-actions {
        justify-content: center;
        width: 100%;
        gap: 0.75rem;
        flex-wrap: wrap;
    }
}

@media (min-width: 640px) {
    .nav-content {
        flex-direction: row;
        padding: 0.75rem 1.5rem;
    }
}


/* ===== 语言选择器样式 ===== */
/* ===== 日间模式样式 ===== */
/* 页面初始加载时的日间模式支持 - 只为关键元素添加以避免CSS冗余 */
html.day-init body,
body.day-mode {
    background: #f0f4f8;
    background-image: url(../../../../assets/image/day-background.png);
    background-size: auto;
    background-repeat: repeat;
    background-attachment: fixed;
}

html.day-init .fo-header h1,
html.day-init .header h1,
body.day-mode .fo-header h1,
body.day-mode .header h1 {
    color: #2d3748;
    text-shadow: .03em .03em 0 hsla(200, 60%, 60%, 1);
}

html.day-init .navbar,
body.day-mode .navbar {
    background-color: rgba(255, 255, 255, 0.7);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

html.day-init .logo-text-desktop,
body.day-mode .logo-text-desktop {
    color: #1a202c;
    font-weight: bold;
    text-shadow: none;
}

html.day-init .nav-btn,
body.day-mode .nav-btn {
    background: #ffffff;
    color: #1a202c;
    border: 2px solid #cbd5e0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

html.day-init .nav-btn::before,
body.day-mode .nav-btn::before {
    background: none;
    backdrop-filter: none;
}

html.day-init .nav-btn::after,
body.day-mode .nav-btn::after {
    display: none;
}

html.day-init .nav-btn:hover:not(:disabled),
body.day-mode .nav-btn:hover:not(:disabled) {
    background: #f7fafc;
    border-color: #a0aec0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

html.day-init .fo-controls,
html.day-init .fo-help,
html.day-init .variant-card,
body.day-mode .fo-controls,
body.day-mode .fo-help,
body.day-mode .variant-card {
    background: rgba(255, 255, 255, 0.5);
    border-color: rgba(0, 0, 0, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 以下样式只使用 body.day-mode，由 JS 在加载后应用 */
body.day-mode {
    color: #2d3748;
}

body.day-mode .fo-sub,
body.day-mode .description {
    color: #4a5568;
}

body.day-mode .fo-row label {
    color: #2d3748;
}

body.day-mode .fo-row input[type="number"],
body.day-mode .fo-row select {
    background: rgba(255, 255, 255, 0.7);
    color: #1a202c;
    border-color: rgba(0, 0, 0, 0.15);
}

body.day-mode .fo-row input[type="number"]:focus,
body.day-mode .fo-row select:focus {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(59, 130, 246, 0.5);
}

body.day-mode .fo-row select option {
    background: #ffffff;
    color: #1a202c;
}

body.day-mode .btn,
body.day-mode .fo-btn {
    color: #1a202c;
}

body.day-mode .btn::before,
body.day-mode .fo-btn::before {
    background: linear-gradient(
        hsl(0 0% 100% / 0.5),
        hsl(0 0% 90% / 0.5)
    );
}

body.day-mode .fo-stats {
    color: #4a5568;
}

body.day-mode .fo-stats b {
    color: #1a202c;
}

/* 日间模式下未点亮的格子样式 - 更明显的边框和背景 */
body.day-mode .fo-cell {
    background: rgba(255, 255, 255, 0.8);
    border: 2px solid rgba(0, 0, 0, 0.3);
    color: #4a5568;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

html.day-init .variant-dec-page .fo-cell,
body.day-mode .variant-dec-page .fo-cell {
    color: #4a5568;
    text-shadow: none;
}

body.day-mode .fo-cell:hover {
    border-color: rgba(0, 0, 0, 0.5);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
}

/* 日间模式下点亮的格子 - 保持和夜间一样的发光效果 */
body.day-mode .fo-cell.on {
    background: linear-gradient(135deg, rgba(255, 212, 59, 0.9), rgba(255, 193, 7, 0.9));
    color: hsl(40 100% 30%);
    border-color: rgba(255, 212, 59, 0.5);
    box-shadow: 0 0 20px rgba(255, 212, 59, 0.4);
}

/* 日间模式下提示格子 - 保持和夜间一样的效果 */
body.day-mode .fo-cell.hint {
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.9), rgba(233, 30, 99, 0.9));
    color: white;
    border-color: rgba(255, 107, 157, 0.5);
    box-shadow: 0 0 20px rgba(255, 107, 157, 0.4);
}

body.day-mode .fo-help details {
    color: #4a5568;
}

body.day-mode .fo-help summary {
    color: #1a202c;
}

body.day-mode .variant-card:hover {
    background: rgba(255, 255, 255, 0.7);
    border-color: rgba(0, 0, 0, 0.15);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

body.day-mode .variant-card h3 {
    color: #1a202c;
}

body.day-mode .variant-card p {
    color: #4a5568;
}

body.day-mode .success-modal .modal-content {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(0, 0, 0, 0.1);
}

body.day-mode .success-modal h3 {
    color: #1a202c;
}

body.day-mode .success-modal p {
    color: #4a5568;
}

body.day-mode .hint-num {
    color: #1a202c;
}

/* 日间模式下的语言切换器 - 更明显的样式 */
/* 日间模式语言选择器颜色由 nav-btn 统一控制 */

/* 日间模式下的异形图块颜色 - 保持和夜间一致 */
body.day-mode .alien-red {
    background: linear-gradient(145deg, rgba(247, 101, 101, 0.9), rgba(247, 101, 101, 0.8)) !important;
    color: hsl(0 0% 20%) !important;
    border-color: rgba(247, 101, 101, 0.5) !important;
}

body.day-mode .alien-green {
    background: linear-gradient(145deg, rgba(168, 216, 168, 0.9), rgba(153, 199, 153, 0.8)) !important;
    color: hsl(0 0% 20%) !important;
    border-color: rgba(153, 199, 153, 0.5) !important;
}

body.day-mode .alien-blue {
    background: linear-gradient(145deg, rgba(168, 200, 232, 0.9), rgba(153, 184, 214, 0.8)) !important;
    color: hsl(0 0% 20%) !important;
    border-color: rgba(153, 184, 214, 0.5) !important;
}

body.day-mode .alien-purple {
    background: linear-gradient(145deg, rgba(192, 132, 161, 0.9), rgba(168, 112, 138, 0.8)) !important;
    color: white !important;
    border-color: rgba(168, 112, 138, 0.5) !important;
}

/* ===== 日夜切换器样式 ===== */
.theme-toggle__checkbox {
  display: none;
}

.theme-toggle__btn {
  display: block;
  position: relative;
  width: 125px;
  height: 70px;
  border-radius: 70px;
  border: 5px solid #1c1c1c;
  background-color: #3c4145;
  cursor: pointer;
  transition: all 350ms ease-in;
}

/* 禁用初始加载时的动画 */
.theme-toggle__btn.no-transition,
.theme-toggle__btn.no-transition::before,
.theme-toggle__btn.no-transition::after,
.theme-toggle__btn.no-transition .theme-toggle__feature,
.theme-toggle__btn.no-transition .theme-toggle__feature::before {
  transition: none !important;
  animation: none !important;
}

.theme-toggle__btn::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background-color: #fff;
  border: 5px solid #e3e3c7;
  transition: all 250ms ease-in;
}

.theme-toggle__btn::after {
  content: '';
  position: absolute;
  top: 62%;
  left: 39px;
  z-index: 10;
  width: 9.2px;
  height: 9.2px;
  opacity: 0;
  background-color: #fff;
  border-radius: 50%;
  box-shadow:
    #fff 0 0,
    #fff 2.5px 0,
    #fff 5px 0,
    #fff 7.5px 0,
    #fff 9px 0,
    #fff 11.5px 0,
    #fff 13px 0,
    #fff 17px -1px 0 1px,
    #fff 13px -6px 0 -2px,
    #fff 6px -6px 0 1px,
    #d3d3d3 0 0 0 3.5px,
    #d3d3d3 5px 0 0 3.5px,
    #d3d3d3 9px 0 0 3.5px,
    #d3d3d3 13px 0 0 3.5px,
    #d3d3d3 17px -1px 0 4.5px,
    #d3d3d3 13px -6px 0 1px,
    #d3d3d3 6px -6px 0 4.5px;
  transition: opacity 100ms ease-in;
}

.theme-toggle__feature {
  display: block;
  position: absolute;
  top: 9px;
  left: 52.5%;
  z-index: 20;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: #fff;
  box-shadow:
    rgba(255,255,255,0.1) 30px -3px 0 0,
    rgba(255,255,255,0.1) 12px 10px 0 -1px,
    #fff 38px 18px 0 1px,
    rgba(255,255,255,0.1) 32px 34px 0 0,
    #fff 20px 24px 0 -1.5px,
    rgba(255,255,255,0.1) 5px 38px 0 1px;
  animation: starry_star 5s ease-in-out infinite;
}

.theme-toggle__feature::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -25px;
  width: 15px;
  height: 15px;
  background-color: #fff;
  border-radius: 50%;
  border: 4px solid #e3e3c7;
  box-shadow:
    #e3e3c7 -28px 0 0 -3px,
    #e3e3c7 -8px 24px 0 -2px;
  transform-origin: -6px 130%;
  transition: all 250ms ease-in;
}

@keyframes starry_star {
  50% {
    background-color: rgba(255,255,255,0.1);
    box-shadow:
      #fff 30px -3px 0 0,
      #fff 12px 10px 0 -1px,
      rgba(255,255,255,0.1) 38px 18px 0 1px,
      #fff 32px 34px 0 0,
      rgba(255,255,255,0.1) 20px 24px 0 -1.5px,
      #fff 5px 38px 0 1px;
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.1);
  }
  55% {
    transform: scale(1.1);
  }
  75% {
    transform: scale(.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.theme-toggle__checkbox:checked + .theme-toggle__btn {
  background-color: #9ee3fb;
  border: 5px solid #86c3d7;
}

.theme-toggle__checkbox:checked + .theme-toggle__btn::before {
  left: 57px;
  background-color: #ffdf6d;
  border: 5px solid #e1c348;
}

.theme-toggle__checkbox:checked + .theme-toggle__btn::after {
  opacity: 1;
  animation-name: bounceIn;
  animation-duration: 0.60s;
  animation-delay: 0.10s;
  animation-fill-mode: backwards;
  animation-timing-function: ease-in-out;
}

.theme-toggle__checkbox:checked + .theme-toggle__btn .theme-toggle__feature {
  opacity: 0;
  box-shadow:
    rgba(255,255,255,0.1) 30px -3px 0 -4px,
    rgba(255,255,255,0.1) 12px 10px 0 -5px,
    #fff 38px 18px 0 -3px,
    rgba(255,255,255,0.1) 32px 34px 0 -4px,
    #fff 20px 24px 0 -5.5px,
    rgba(255,255,255,0.1) 5px 38px 0 -3px;
  animation: none;
}

.theme-toggle__checkbox:checked + .theme-toggle__btn .theme-toggle__feature::before {
  left: 25px;
  transform: rotate(70deg);
}


/* ===== 页脚样式 ===== */
/* ===== Navbar Theme Toggle ===== */
.navbar .theme-toggle-container {
  width: 60px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.navbar .theme-toggle {
  position: relative;
  top: auto;
  right: auto;
  bottom: auto;
  left: auto;
  z-index: 1000;
  user-select: none;
  transform: scale(0.45);
  transform-origin: center;
}

/* ===== 椤佃剼鏍�փ紡 ===== */
.footer {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 2rem 1rem;
  text-align: center;
  margin-top: 3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer p {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
  transition: color 300ms ease-out;
  line-height: 1.8;
}

/* 日间模式页脚样式 */
body.day-mode .footer p {
  color: rgba(0, 0, 0, 0.5);
}

body.day-mode .footer {
  border-top-color: rgba(0,0,0,0.1);
}

/* 页脚响应式 */
@media (max-width: 768px) {
  .footer {
    padding: 1.5rem 1rem;
  }

  .footer p {
    font-size: 0.75rem;
  }
}