<!-- assets/css/styles.css -->
    /* Base styles copied from original, adjusted for multi-page */
    *, *::before, *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
        -webkit-tap-highlight-color: transparent;
    }
    :root {
        --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
        --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
        --font-display: 'Space Grotesk', 'Inter', sans-serif;
        --bg-body: #050810;
        --bg-card: rgba(13, 20, 32, .88);
        --bg-card-border: #1a2838;
        --text-main: #e6edf5;
        --text-secondary: #9aa8b8;
        --text-muted: #5c6b7a;
        --accent: #8b5cf6;
        --accent-glow: rgba(139, 92, 246, .24);
        --secondary-accent: #22d3ee;
        --mc-gold: #fbbf24;
        --grid-bg: #0a101c;
        --grid-line: rgba(148, 163, 184, .18);
        --grid-center: #fbbf24;
        --block-fill: #8b5cf6;
        --block-stroke: #7c3aed;
        --block-placed: #10b981;
        --block-placed-stroke: #059669;
        --block-ghost: rgba(139, 92, 246, .28);
        --shadow-elevation: 0 16px 48px rgba(0, 0, 0, .55);
        --glass-blur: blur(18px);
        --transition: .3s cubic-bezier(.4, 0, .2, 1);
    }
    [data-theme="light"] {
        --bg-body: #f0f4f8;
        --bg-card: rgba(255, 255, 255, .95);
        --bg-card-border: #dce5f0;
        --text-main: #1e293b;
        --text-secondary: #475569;
        --text-muted: #64748b;
        --accent: #7c3aed;
        --accent-glow: rgba(124, 58, 237, .18);
        --secondary-accent: #0891b2;
        --mc-gold: #d97706;
        --grid-bg: #f6f9fc;
        --grid-line: rgba(0, 0, 0, .07);
        --grid-center: #d97706;
        --block-fill: #7c3aed;
        --block-stroke: #6d28d9;
        --block-placed: #059669;
        --block-placed-stroke: #047857;
        --block-ghost: rgba(124, 58, 237, .18);
        --shadow-elevation: 0 8px 32px rgba(0, 0, 0, .08);
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: var(--font-main);
        background: var(--bg-body);
        color: var(--text-main);
        line-height: 1.65;
        overflow-x: hidden;
        min-height: 100vh;
        transition: background var(--transition), color var(--transition);
    }
    .ambient-glow {
        position: fixed;
        top: -30%;
        left: 50%;
        transform: translateX(-50%);
        width: 1100px;
        height: 700px;
        background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
        z-index: -1;
        pointer-events: none;
        filter: blur(100px);
        opacity: .5;
    }
    .container {
        max-width: 1440px;
        margin: 0 auto;
        padding: 1.25rem 1.5rem;
    }
    /* Header */
    header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem 0;
        border-bottom: 1px solid var(--bg-card-border);
        margin-bottom: 2rem;
        flex-wrap: wrap;
        gap: .75rem;
    }
    .brand-group {
        display: flex;
        align-items: center;
        gap: 1rem;
        text-decoration: none;
        color: inherit;
    }
    .brand-icon {
        width: 48px;
        height: 48px;
        border-radius: 14px;
        background: linear-gradient(135deg, var(--accent), #4f46e5);
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 4px 20px var(--accent-glow);
        border: 1px solid rgba(255, 255, 255, .15);
    }
    .brand-icon svg {
        width: 26px;
        height: 26px;
        fill: #fff;
    }
    .brand-text h1 {
        font-family: var(--font-display);
        font-size: 1.45rem;
        font-weight: 700;
        letter-spacing: -.5px;
        line-height: 1.2;
    }
    .brand-text p {
        font-size: .78rem;
        color: var(--text-muted);
        letter-spacing: .2px;
        margin-top: 2px;
    }
    .nav-actions {
        display: flex;
        align-items: center;
        gap: .65rem;
    }
    .site-nav {
        display: flex;
        gap: 1.2rem;
        flex-wrap: wrap;
        align-items: center;
    }
    .site-nav a {
        color: var(--text-secondary);
        text-decoration: none;
        font-weight: 500;
        font-size: .9rem;
        transition: color .2s;
    }
    .site-nav a:hover {
        color: var(--accent);
    }
    .theme-toggle-btn,
    .audio-toggle-btn {
        background: var(--bg-card);
        border: 1px solid var(--bg-card-border);
        color: var(--text-main);
        padding: .5rem 1rem;
        border-radius: 12px;
        cursor: pointer;
        display: flex;
        align-items: center;
        gap: .45rem;
        font-size: .8rem;
        font-weight: 600;
        backdrop-filter: var(--glass-blur);
        transition: all var(--transition);
        box-shadow: 0 2px 10px rgba(0, 0, 0, .15);
    }
    .theme-toggle-btn:hover,
    .audio-toggle-btn:hover {
        border-color: var(--accent);
        transform: translateY(-2px);
        box-shadow: 0 4px 20px var(--accent-glow);
    }
    /* Studio grid (generator) */
    .studio-grid {
        display: grid;
        grid-template-columns: 420px 1fr;
        gap: 1.5rem;
        margin-bottom: 3rem;
    }
    @media(max-width:1024px) {
        .studio-grid {
            grid-template-columns: 1fr;
        }
    }
    .control-panel {
        background: var(--bg-card);
        border: 1px solid var(--bg-card-border);
        border-radius: 20px;
        padding: 1.5rem;
        backdrop-filter: var(--glass-blur);
        box-shadow: var(--shadow-elevation);
        display: flex;
        flex-direction: column;
        gap: 1.4rem;
        height: fit-content;
        position: sticky;
        top: 1rem;
        max-height: calc(100vh - 2rem);
        overflow-y: auto;
    }
    @media(max-width:1024px) {
        .control-panel {
            position: static;
            max-height: none;
            overflow-y: visible;
        }
    }
    .panel-section-title {
        font-size: .72rem;
        text-transform: uppercase;
        letter-spacing: 1.2px;
        color: var(--text-secondary);
        font-weight: 700;
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: .5rem;
    }
    .pill-selector {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
        gap: .4rem;
        background: rgba(0, 0, 0, .2);
        padding: .35rem;
        border-radius: 14px;
        border: 1px solid var(--bg-card-border);
    }
    [data-theme="light"] .pill-selector {
        background: rgba(0, 0, 0, .04);
    }
    .pill-btn {
        background: transparent;
        border: none;
        color: var(--text-secondary);
        padding: .55rem .35rem;
        font-size: .78rem;
        font-weight: 600;
        border-radius: 10px;
        cursor: pointer;
        transition: all var(--transition);
        text-align: center;
        font-family: var(--font-main);
    }
    .pill-btn:hover {
        color: var(--text-main);
        background: rgba(255, 255, 255, .06);
    }
    .pill-btn.active {
        background: linear-gradient(135deg, var(--accent), #6d28d9);
        color: #fff;
        font-weight: 700;
        box-shadow: 0 4px 16px var(--accent-glow);
    }
    .form-group {
        display: flex;
        flex-direction: column;
        gap: .45rem;
    }
    .form-label-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: .82rem;
        font-weight: 600;
        color: var(--text-secondary);
    }
    .value-badge {
        font-family: var(--font-mono);
        background: rgba(255, 255, 255, .07);
        padding: .2rem .6rem;
        border-radius: 8px;
        color: var(--accent);
        font-size: .8rem;
        border: 1px solid var(--bg-card-border);
        font-weight: 600;
    }
    [data-theme="light"] .value-badge {
        background: rgba(0, 0, 0, .05);
    }
    .slider-input-group {
        display: flex;
        align-items: center;
        gap: .7rem;
    }
    input[type="range"] {
        flex: 1;
        height: 5px;
        -webkit-appearance: none;
        background: rgba(255, 255, 255, .12);
        border-radius: 6px;
        outline: none;
    }
    [data-theme="light"] input[type="range"] {
        background: rgba(0, 0, 0, .1);
    }
    input[type="range"]::-webkit-slider-thumb {
        -webkit-appearance: none;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--accent), #6d28d9);
        cursor: pointer;
        box-shadow: 0 0 12px var(--accent-glow);
        border: 2px solid #fff;
        transition: transform .2s;
    }
    input[type="range"]::-webkit-slider-thumb:hover {
        transform: scale(1.15);
    }
    input[type="number"] {
        width: 72px;
        background: rgba(0, 0, 0, .22);
        border: 1px solid var(--bg-card-border);
        color: var(--text-main);
        padding: .4rem .5rem;
        border-radius: 10px;
        font-family: var(--font-mono);
        font-size: .8rem;
        text-align: center;
        transition: border-color var(--transition);
    }
    [data-theme="light"] input[type="number"] {
        background: #fff;
    }
    input[type="number"]:focus {
        border-color: var(--accent);
        outline: none;
    }
    .switch-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: .35rem 0;
        font-size: .82rem;
        font-weight: 500;
        color: var(--text-secondary);
    }
    .switch {
        position: relative;
        display: inline-block;
        width: 44px;
        height: 24px;
        flex-shrink: 0;
    }
    .switch input {
        opacity: 0;
        width: 0;
        height: 0;
    }
    .slider-switch {
        position: absolute;
        cursor: pointer;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(255, 255, 255, .15);
        transition: .25s;
        border-radius: 24px;
        border: 1px solid rgba(255, 255, 255, .1);
    }
    [data-theme="light"] .slider-switch {
        background: rgba(0, 0, 0, .12);
    }
    .slider-switch:before {
        position: absolute;
        content: "";
        height: 18px;
        width: 18px;
        left: 3px;
        bottom: 2px;
        background: #fff;
        transition: .25s;
        border-radius: 50%;
        box-shadow: 0 2px 4px rgba(0, 0, 0, .3);
    }
    input:checked+.slider-switch {
        background: linear-gradient(135deg, var(--accent), #6d28d9);
    }
    input:checked+.slider-switch:before {
        transform: translateX(20px);
    }
    .sequence-container {
        background: rgba(0, 0, 0, .2);
        border: 1px solid var(--bg-card-border);
        border-radius: 14px;
        padding: .8rem;
        display: flex;
        flex-direction: column;
        gap: .5rem;
    }
    [data-theme="light"] .sequence-container {
        background: rgba(0, 0, 0, .03);
    }
    .sequence-badges {
        display: flex;
        flex-wrap: wrap;
        gap: .35rem;
        align-items: center;
        min-height: 28px;
    }
    .seq-pill {
        background: rgba(139, 92, 246, .14);
        color: var(--accent);
        border: 1px solid rgba(139, 92, 246, .3);
        padding: .18rem .5rem;
        border-radius: 8px;
        font-family: var(--font-mono);
        font-size: .78rem;
        font-weight: 700;
    }
    .seq-info-pill {
        color: var(--text-muted);
        font-size: .74rem;
        font-style: italic;
    }
    .progress-hud {
        background: rgba(0, 0, 0, .2);
        border: 1px solid var(--bg-card-border);
        border-radius: 14px;
        padding: .8rem;
        display: flex;
        flex-direction: column;
        gap: .5rem;
    }
    [data-theme="light"] .progress-hud {
        background: rgba(0, 0, 0, .03);
    }
    .progress-bar-bg {
        width: 100%;
        height: 8px;
        background: rgba(255, 255, 255, .1);
        border-radius: 8px;
        overflow: hidden;
    }
    [data-theme="light"] .progress-bar-bg {
        background: rgba(0, 0, 0, .08);
    }
    .progress-bar-fill {
        height: 100%;
        width: 0%;
        background: linear-gradient(90deg, var(--accent), var(--secondary-accent));
        transition: width .3s ease;
        border-radius: 8px;
    }
    .progress-actions {
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: .75rem;
        gap: .5rem;
        flex-wrap: wrap;
    }
    .progress-btn-group {
        display: flex;
        gap: .3rem;
        flex-wrap: wrap;
    }
    .tool-btn {
        background: rgba(255, 255, 255, .07);
        border: 1px solid var(--bg-card-border);
        color: var(--text-main);
        padding: .42rem .7rem;
        border-radius: 10px;
        font-size: .75rem;
        font-weight: 600;
        cursor: pointer;
        display: flex;
        align-items: center;
        gap: .3rem;
        transition: all .2s;
        font-family: var(--font-main);
    }
    [data-theme="light"] .tool-btn {
        background: #f0f4f8;
    }
    .tool-btn:hover {
        background: rgba(255, 255, 255, .12);
        border-color: var(--accent);
    }
    .tool-btn:disabled {
        opacity: .35;
        cursor: not-allowed;
        border-color: var(--bg-card-border);
    }
    .stats-card {
        background: rgba(0, 0, 0, .2);
        border: 1px solid var(--bg-card-border);
        border-radius: 14px;
        padding: 1rem;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: .75rem;
    }
    [data-theme="light"] .stats-card {
        background: rgba(0, 0, 0, .03);
    }
    .stat-item {
        display: flex;
        flex-direction: column;
        gap: 2px;
    }
    .stat-label {
        font-size: .68rem;
        color: var(--text-muted);
        text-transform: uppercase;
        letter-spacing: .6px;
        font-weight: 600;
    }
    .stat-value {
        font-size: 1rem;
        font-weight: 700;
        font-family: var(--font-mono);
        color: var(--accent);
    }
    /* Canvas */
    .canvas-stage {
        background: var(--bg-card);
        border: 1px solid var(--bg-card-border);
        border-radius: 20px;
        display: flex;
        flex-direction: column;
        backdrop-filter: var(--glass-blur);
        box-shadow: var(--shadow-elevation);
        position: relative;
        min-height: 620px;
        overflow: hidden;
    }
    .stage-toolbar {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: .8rem 1.2rem;
        border-bottom: 1px solid var(--bg-card-border);
        background: rgba(0, 0, 0, .14);
        flex-wrap: wrap;
        gap: .5rem;
        z-index: 20;
    }
    [data-theme="light"] .stage-toolbar {
        background: rgba(0, 0, 0, .02);
    }
    .tool-group {
        display: flex;
        align-items: center;
        gap: .45rem;
        flex-wrap: wrap;
    }
    .viewport-wrapper {
        position: relative;
        flex: 1;
        width: 100%;
        height: 100%;
        min-height: 520px;
        overflow: hidden;
        cursor: grab;
        touch-action: none;
        background: var(--grid-bg);
        user-select: none;
    }
    .viewport-wrapper:active {
        cursor: grabbing;
    }
    canvas {
        position: absolute;
        top: 0;
        left: 0;
        display: block;
        image-rendering: pixelated;
    }
    .hud-inspector {
        position: absolute;
        bottom: 1rem;
        left: 1rem;
        background: rgba(5, 8, 16, .85);
        border: 1px solid var(--bg-card-border);
        border-radius: 12px;
        padding: .45rem .8rem;
        font-family: var(--font-mono);
        font-size: .74rem;
        color: var(--text-main);
        pointer-events: none;
        backdrop-filter: blur(10px);
        z-index: 10;
        box-shadow: 0 4px 16px rgba(0, 0, 0, .3);
    }
    [data-theme="light"] .hud-inspector {
        background: rgba(255, 255, 255, .9);
    }
    .hud-zoom-hint {
        position: absolute;
        top: 1rem;
        right: 1rem;
        background: rgba(5, 8, 16, .8);
        border: 1px solid var(--bg-card-border);
        border-radius: 10px;
        padding: .35rem .7rem;
        font-size: .7rem;
        color: var(--text-muted);
        pointer-events: none;
        backdrop-filter: blur(8px);
        z-index: 10;
    }
    [data-theme="light"] .hud-zoom-hint {
        background: rgba(255, 255, 255, .85);
    }
    .sphere-layer-hud {
        position: absolute;
        bottom: 1rem;
        right: 1rem;
        background: var(--bg-card);
        border: 1px solid var(--bg-card-border);
        border-radius: 16px;
        padding: .85rem 1.1rem;
        backdrop-filter: blur(14px);
        display: flex;
        align-items: center;
        gap: .65rem;
        z-index: 15;
        box-shadow: var(--shadow-elevation);
    }
    /* Guide & FAQ */
    .guide-article {
        background: var(--bg-card);
        border: 1px solid var(--bg-card-border);
        border-radius: 24px;
        padding: 3rem;
        backdrop-filter: var(--glass-blur);
        box-shadow: var(--shadow-elevation);
        margin-bottom: 3rem;
        line-height: 1.8;
        color: var(--text-main);
    }
    @media(max-width:768px) {
        .guide-article {
            padding: 1.75rem;
        }
    }
    .guide-article h2 {
        font-family: var(--font-display);
        font-size: 1.65rem;
        color: var(--accent);
        margin: 2.75rem 0 1.25rem;
        font-weight: 700;
        letter-spacing: -.4px;
        border-bottom: 2px solid var(--bg-card-border);
        padding-bottom: .6rem;
    }
    .guide-article h2:first-of-type {
        margin-top: 0;
    }
    .guide-article h3 {
        font-size: 1.2rem;
        color: var(--secondary-accent);
        margin: 1.8rem 0 .8rem;
        font-weight: 600;
    }
    .guide-article p {
        margin-bottom: 1.35rem;
        color: var(--text-secondary);
        font-size: .98rem;
    }
    .guide-article strong {
        color: var(--text-main);
    }
    .guide-article code {
        font-family: var(--font-mono);
        background: rgba(139, 92, 246, 0.12);
        color: var(--accent);
        padding: 0.15rem 0.45rem;
        border-radius: 6px;
        font-size: 0.88rem;
        border: 1px solid rgba(139, 92, 246, 0.25);
    }
    .guide-article ul,
    .guide-article ol {
        margin-left: 1.75rem;
        margin-bottom: 1.5rem;
        color: var(--text-secondary);
    }
    .guide-article li {
        margin-bottom: .6rem;
    }
    .guide-callout {
        background: linear-gradient(135deg, rgba(139, 92, 246, .1), rgba(34, 211, 238, .07));
        border-left: 4px solid var(--accent);
        padding: 1.4rem;
        border-radius: 0 14px 14px 0;
        margin: 1.75rem 0;
        font-size: .98rem;
    }
    .table-container {
        overflow-x: auto;
        margin: 1.75rem 0 2.25rem;
    }
    .guide-table {
        width: 100%;
        border-collapse: collapse;
        text-align: left;
        font-size: .9rem;
        border-radius: 12px;
        overflow: hidden;
    }
    .guide-table th,
    .guide-table td {
        padding: .85rem 1rem;
        border: 1px solid var(--bg-card-border);
    }
    .guide-table th {
        background: rgba(0, 0, 0, .25);
        color: var(--accent);
        font-weight: 700;
        text-transform: uppercase;
        font-size: .78rem;
        letter-spacing: .6px;
    }
    [data-theme="light"] .guide-table th {
        background: rgba(0, 0, 0, .05);
    }
    .faq-item {
        border: 1px solid var(--bg-card-border);
        border-radius: 14px;
        margin-bottom: .85rem;
        overflow: hidden;
        background: rgba(0, 0, 0, .14);
        transition: border-color var(--transition);
    }
    [data-theme="light"] .faq-item {
        background: rgba(0, 0, 0, .02);
    }
    .faq-item:hover {
        border-color: var(--accent);
    }
    .faq-header {
        padding: 1.1rem 1.35rem;
        font-weight: 600;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        transition: background .2s;
        width: 100%;
        background: none;
        border: none;
        color: var(--text-main);
        text-align: left;
        font-size: .95rem;
    }
    .faq-header:hover {
        background: rgba(255, 255, 255, .04);
    }
    .faq-content {
        padding: 0 1.35rem 1.25rem;
        display: none;
        color: var(--text-secondary);
        font-size: .94rem;
        line-height: 1.7;
    }
    .faq-item.open .faq-content {
        display: block;
    }
    /* Info pages */
    .page-section {
        background: var(--bg-card);
        border: 1px solid var(--bg-card-border);
        border-radius: 24px;
        padding: 2.75rem;
        backdrop-filter: var(--glass-blur);
        box-shadow: var(--shadow-elevation);
        margin-bottom: 2.5rem;
    }
    @media(max-width: 768px) {
        .page-section {
            padding: 1.5rem;
        }
    }
    .page-section h2 {
        font-family: var(--font-display);
        font-size: 1.5rem;
        color: var(--accent);
        margin-bottom: 1.25rem;
        border-bottom: 2px solid var(--bg-card-border);
        padding-bottom: 0.5rem;
    }
    .contact-form {
        display: flex;
        flex-direction: column;
        gap: 1.2rem;
        max-width: 680px;
    }
    .form-row {
        display: flex;
        flex-direction: column;
        gap: 0.45rem;
    }
    .form-row label {
        font-size: 0.85rem;
        font-weight: 600;
        color: var(--text-main);
    }
    .form-row input, .form-row textarea {
        background: rgba(0, 0, 0, 0.25);
        border: 1px solid var(--bg-card-border);
        color: var(--text-main);
        padding: 0.75rem 1rem;
        border-radius: 12px;
        font-family: var(--font-main);
        font-size: 0.92rem;
        outline: none;
        transition: border-color 0.2s;
    }
    [data-theme="light"] .form-row input, [data-theme="light"] .form-row textarea {
        background: #fff;
    }
    .form-row input:focus, .form-row textarea:focus {
        border-color: var(--accent);
    }
    .submit-btn {
        background: linear-gradient(135deg, var(--accent), #6d28d9);
        color: #fff;
        padding: 0.75rem 1.75rem;
        border: none;
        border-radius: 12px;
        font-weight: 700;
        font-size: 0.95rem;
        cursor: pointer;
        width: fit-content;
        box-shadow: 0 4px 16px var(--accent-glow);
        transition: transform 0.2s;
    }
    .submit-btn:hover {
        transform: translateY(-2px);
    }
    footer {
        border-top: 1px solid var(--bg-card-border);
        padding: 2.5rem 0;
        text-align: center;
        color: var(--text-muted);
        font-size: .84rem;
    }
    .footer-nav {
        display: flex;
        justify-content: center;
        gap: 1.5rem;
        margin-bottom: 1.25rem;
        flex-wrap: wrap;
    }
    .footer-nav a {
        color: var(--text-secondary);
        text-decoration: none;
        font-weight: 600;
        transition: color 0.2s;
    }
    .footer-nav a:hover {
        color: var(--accent);
    }
    .toast {
        position: fixed;
        bottom: 2rem;
        left: 50%;
        transform: translateX(-50%) translateY(100px);
        background: #0d1420;
        color: #e6edf5;
        border: 1px solid var(--accent);
        padding: .65rem 1.3rem;
        border-radius: 12px;
        font-size: .84rem;
        box-shadow: 0 8px 32px rgba(0, 0, 0, .5);
        opacity: 0;
        transition: all .4s cubic-bezier(.16, 1, .3, 1);
        z-index: 1000;
        pointer-events: none;
    }
    .toast.show {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
    ::-webkit-scrollbar {
        width: 8px;
        height: 8px;
    }
    ::-webkit-scrollbar-track {
        background: transparent;
    }
    ::-webkit-scrollbar-thumb {
        background: rgba(139, 92, 246, .4);
        border-radius: 8px;
    }
    ::-webkit-scrollbar-thumb:hover {
        background: var(--accent);
    }
    @media (max-width: 480px) {
        .viewport-wrapper {
            min-height: 400px;
        }
        }

/* NEW: Prevent sphere HUD ... */
.sphere-layer-hud {
    bottom: 5rem;
}
    }
    /* Print */
    #printMetadata {
        display: none;
        padding: 1rem 1.5rem;
        background: #fff;
        color: #000;
        border-bottom: 2px solid #8b5cf6;
    }
    #printMetadata h2 {
        margin: 0 0 .4rem 0;
        font-family: var(--font-display);
        color: #7c3aed;
        font-size: 1.3rem;
    }
    #printMetadata p {
        margin: 0;
        font-family: var(--font-mono);
        font-size: .9rem;
    }
    @media print {
        body { background: #fff !important; color: #000 !important; }
        .control-panel, .stage-toolbar, header, footer, .ambient-glow,
        .hud-inspector, .hud-zoom-hint, .sphere-layer-hud, .progress-hud,
        .guide-article, .page-section, .toast, .brand-group, .nav-actions,
        .tool-btn { display: none !important; }
        .container { max-width: 100% !important; padding: 0 !important; }
        .studio-grid { display: block !important; }
        .canvas-stage { border: none !important; box-shadow: none !important;
            border-radius: 0 !important; backdrop-filter: none !important;
            min-height: 0 !important; overflow: visible !important; }
        #printMetadata { display: block !important; }
        .viewport-wrapper { position: static !important; overflow: visible !important;
            min-height: auto !important; height: auto !important; }
        canvas {
            position: static !important;
            width: 100% !important;
            height: auto !important;
            max-width: 100% !important;
            background: #ffffff !important;
            filter: grayscale(100%) invert(100%) contrast(150%) !important;
        }
        .sphere-layer-hud { display: none !important; }
    }

 /* Mobile navigation styles */
  .menu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--bg-card-border);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    color: var(--text-main);
    font-size: 1.2rem;
  }

  .menu-toggle:hover {
    background: rgba(255,255,255,0.05);
  }

  @media (max-width: 768px) {
    .site-nav {
      display: none;
      flex-direction: column;
      width: 100%;
      background: var(--bg-card);
      border: 1px solid var(--bg-card-border);
      border-radius: 12px;
      padding: 0.5rem;
      margin-top: 0.5rem;
      position: absolute;
      top: 100%;
      left: 0;
      z-index: 1000;
    }

    .site-nav.open {
      display: flex;
    }

    .menu-toggle {
      display: block;
    }

    header {
      flex-wrap: wrap;
      position: relative;
    }
/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

:root {
    /* Fonts (non‑theme) */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;
    --transition: .3s cubic-bezier(.4, 0, .2, 1);
    --glass-blur: blur(18px);
    --shadow-elevation: 0 16px 48px rgba(0, 0, 0, .55);
}

/* ===== THEME VARIABLES (HIGH SPECIFICITY) ===== */
html[data-theme="dark"] {
    --bg-body: #050810;
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: rgba(13, 20, 32, .92);
    --bg-card-secondary: #1e242c;
    --bg-card-border: #1a2838;
    --text-main: #e6edf5;
    --text-primary: #e2e8f0;
    --text-secondary: #9aa8b8;
    --text-muted: #5c6b7a;
    --accent: #8b5cf6;
    --accent-glow: rgba(139, 92, 246, .24);
    --secondary-accent: #22d3ee;
    --mc-gold: #fbbf24;
    --grid-bg: #0a101c;
    --grid-line: rgba(148, 163, 184, .18);
    --grid-center: rgba(251, 191, 36, .8);
    --block-fill: #8b5cf6;
    --block-stroke: #7c3aed;
    --block-placed: #10b981;
    --block-placed-stroke: #059669;
    --block-ghost: rgba(139, 92, 246, .28);
    --bg-card-secondary-alt: #252d38;
}

html[data-theme="light"] {
    --bg-body: #f0f4f8;
    --bg-primary: #ffffff;
    --bg-secondary: #f1f5f9;
    --bg-card: rgba(255, 255, 255, .96);
    --bg-card-secondary: #f1f5f9;
    --bg-card-border: #dce5f0;
    --text-main: #1e293b;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent: #7c3aed;
    --accent-glow: rgba(124, 58, 237, .18);
    --secondary-accent: #0891b2;
    --mc-gold: #d97706;
    --grid-bg: #f6f9fc;
    --grid-line: rgba(0, 0, 0, .07);
    --grid-center: rgba(180, 83, 9, .8);
    --block-fill: #7c3aed;
    --block-stroke: #6d28d9;
    --block-placed: #059669;
    --block-placed-stroke: #047857;
    --block-ghost: rgba(124, 58, 237, .18);
    --bg-card-secondary-alt: #f1f5f9;
    --shadow-elevation: 0 8px 32px rgba(0, 0, 0, .08);
}

/* ===== GLOBAL STYLES ===== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background: var(--bg-body);
    color: var(--text-main);
    line-height: 1.65;
    overflow-x: hidden;
    min-height: 100vh;
    transition: background var(--transition), color var(--transition);
}

.ambient-glow {
    position: fixed;
    top: -30%;
    left: 50%;
    transform: translateX(-50%);
    width: 1100px;
    height: 700px;
    background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
    filter: blur(100px);
    opacity: .5;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 1.25rem 1.5rem;
}

/* ===== HEADER ===== */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--bg-card-border);
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: .75rem;
    position: relative;
}

.brand-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: inherit;
}

.brand-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--accent), #4f46e5);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px var(--accent-glow);
    border: 1px solid rgba(255, 255, 255, .15);
    flex-shrink: 0;
}

.brand-icon svg {
    width: 26px;
    height: 26px;
    fill: #fff;
}

.brand-text h1 {
    font-family: var(--font-display);
    font-size: 1.45rem;
    font-weight: 700;
    letter-spacing: -.5px;
    line-height: 1.2;
}

.brand-text p {
    font-size: .78rem;
    color: var(--text-muted);
    letter-spacing: .2px;
    margin-top: 2px;
}

.site-nav {
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
    align-items: center;
}

.site-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: .9rem;
    transition: color .2s;
}

.site-nav a:hover {
    color: var(--accent);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: .65rem;
}

.theme-toggle-btn,
.audio-toggle-btn {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    color: var(--text-main);
    padding: .5rem 1rem;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: .45rem;
    font-size: .8rem;
    font-weight: 600;
    backdrop-filter: var(--glass-blur);
    transition: all var(--transition);
    box-shadow: 0 2px 10px rgba(0, 0, 0, .15);
    font-family: var(--font-main);
}

.theme-toggle-btn:hover,
.audio-toggle-btn:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

/* ===== STUDIO GRID ===== */
.studio-grid {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

@media(max-width:1024px) {
    .studio-grid {
        grid-template-columns: 1fr;
    }
}

.control-panel {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: 20px;
    padding: 1.5rem;
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-elevation);
    display: flex;
    flex-direction: column;
    gap: 1.4rem;
    height: fit-content;
    position: sticky;
    top: 1rem;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
}

@media(max-width:1024px) {
    .control-panel {
        position: static;
        max-height: none;
        overflow-y: visible;
    }
}

.panel-section-title {
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-secondary);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: .5rem;
}

.pill-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
    gap: .4rem;
    background: rgba(0, 0, 0, .2);
    padding: .35rem;
    border-radius: 14px;
    border: 1px solid var(--bg-card-border);
}

html[data-theme="light"] .pill-selector {
    background: rgba(0, 0, 0, .04);
}

.pill-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: .55rem .35rem;
    font-size: .78rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
    font-family: var(--font-main);
}

.pill-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, .06);
}

.pill-btn.active {
    background: linear-gradient(135deg, var(--accent), #6d28d9);
    color: #fff;
    font-weight: 700;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: .45rem;
}

.form-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: .82rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.value-badge {
    font-family: var(--font-mono);
    background: rgba(255, 255, 255, .07);
    padding: .2rem .6rem;
    border-radius: 8px;
    color: var(--accent);
    font-size: .8rem;
    border: 1px solid var(--bg-card-border);
    font-weight: 600;
}

html[data-theme="light"] .value-badge {
    background: rgba(0, 0, 0, .05);
}

.slider-input-group {
    display: flex;
    align-items: center;
    gap: .7rem;
}

input[type="range"] {
    flex: 1;
    height: 5px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, .12);
    border-radius: 6px;
    outline: none;
}

html[data-theme="light"] input[type="range"] {
    background: rgba(0, 0, 0, .1);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #6d28d9);
    cursor: pointer;
    box-shadow: 0 0 12px var(--accent-glow);
    border: 2px solid #fff;
    transition: transform .2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #6d28d9);
    cursor: pointer;
    box-shadow: 0 0 12px var(--accent-glow);
    border: 2px solid #fff;
}

input[type="number"] {
    width: 72px;
    background: rgba(0, 0, 0, .22);
    border: 1px solid var(--bg-card-border);
    color: var(--text-main);
    padding: .4rem .5rem;
    border-radius: 10px;
    font-family: var(--font-mono);
    font-size: .8rem;
    text-align: center;
    transition: border-color var(--transition);
}

html[data-theme="light"] input[type="number"] {
    background: #fff;
}

input[type="number"]:focus {
    border-color: var(--accent);
    outline: none;
}

/* ===== TOGGLES ===== */
.switch-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: .35rem 0;
    font-size: .82rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider-switch {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, .15);
    transition: .25s;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, .1);
}

html[data-theme="light"] .slider-switch {
    background: rgba(0, 0, 0, .12);
}

.slider-switch:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 2px;
    background: #fff;
    transition: .25s;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, .3);
}

input:checked+.slider-switch {
    background: linear-gradient(135deg, var(--accent), #6d28d9);
}

input:checked+.slider-switch:before {
    transform: translateX(20px);
}

/* ===== SEQUENCE ===== */
.sequence-container {
    background: rgba(0, 0, 0, .2);
    border: 1px solid var(--bg-card-border);
    border-radius: 14px;
    padding: .8rem;
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

html[data-theme="light"] .sequence-container {
    background: rgba(0, 0, 0, .03);
}

.sequence-badges {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
    align-items: center;
    min-height: 28px;
}

.seq-pill {
    background: rgba(139, 92, 246, .14);
    color: var(--accent);
    border: 1px solid rgba(139, 92, 246, .3);
    padding: .18rem .5rem;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: .78rem;
    font-weight: 700;
}

.seq-info-pill {
    color: var(--text-muted);
    font-size: .74rem;
    font-style: italic;
}

/* ===== PROGRESS ===== */
.progress-hud {
    background: rgba(0, 0, 0, .2);
    border: 1px solid var(--bg-card-border);
    border-radius: 14px;
    padding: .8rem;
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

html[data-theme="light"] .progress-hud {
    background: rgba(0, 0, 0, .03);
}

.progress-bar-bg {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, .1);
    border-radius: 8px;
    overflow: hidden;
}

html[data-theme="light"] .progress-bar-bg {
    background: rgba(0, 0, 0, .08);
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--secondary-accent));
    transition: width .3s ease;
    border-radius: 8px;
}

.progress-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: .75rem;
    gap: .5rem;
    flex-wrap: wrap;
}

.progress-btn-group {
    display: flex;
    gap: .3rem;
    flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.tool-btn {
    background: rgba(255, 255, 255, .07);
    border: 1px solid var(--bg-card-border);
    color: var(--text-main);
    padding: .42rem .7rem;
    border-radius: 10px;
    font-size: .75rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: .3rem;
    transition: all .2s;
    font-family: var(--font-main);
}

html[data-theme="light"] .tool-btn {
    background: #f0f4f8;
}

.tool-btn:hover {
    background: rgba(255, 255, 255, .12);
    border-color: var(--accent);
}

.tool-btn:disabled {
    opacity: .35;
    cursor: not-allowed;
    border-color: var(--bg-card-border);
}

/* ===== STATS ===== */
.stats-card {
    background: rgba(0, 0, 0, .2);
    border: 1px solid var(--bg-card-border);
    border-radius: 14px;
    padding: 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .75rem;
}

html[data-theme="light"] .stats-card {
    background: rgba(0, 0, 0, .03);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.stat-label {
    font-size: .68rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .6px;
    font-weight: 600;
}

.stat-value {
    font-size: 1rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--accent);
}

/* ===== CANVAS STAGE ===== */
.canvas-stage {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-elevation);
    position: relative;
    min-height: 620px;
    overflow: hidden;
}

.stage-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: .8rem 1.2rem;
    border-bottom: 1px solid var(--bg-card-border);
    background: rgba(0, 0, 0, .14);
    flex-wrap: wrap;
    gap: .5rem;
    z-index: 20;
}

html[data-theme="light"] .stage-toolbar {
    background: rgba(0, 0, 0, .02);
}

.tool-group {
    display: flex;
    align-items: center;
    gap: .45rem;
    flex-wrap: wrap;
}

.viewport-wrapper {
    position: relative;
    flex: 1;
    width: 100%;
    height: 100%;
    min-height: 520px;
    overflow: hidden;
    cursor: grab;
    touch-action: none;
    background: var(--grid-bg);
    user-select: none;
}

.viewport-wrapper:active {
    cursor: grabbing;
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    image-rendering: pixelated;
}

.hud-inspector {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    background: rgba(5, 8, 16, .85);
    border: 1px solid var(--bg-card-border);
    border-radius: 12px;
    padding: .45rem .8rem;
    font-family: var(--font-mono);
    font-size: .74rem;
    color: var(--text-main);
    pointer-events: none;
    backdrop-filter: blur(10px);
    z-index: 10;
    box-shadow: 0 4px 16px rgba(0, 0, 0, .3);
}

html[data-theme="light"] .hud-inspector {
    background: rgba(255, 255, 255, .9);
}

.hud-zoom-hint {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(5, 8, 16, .8);
    border: 1px solid var(--bg-card-border);
    border-radius: 10px;
    padding: .35rem .7rem;
    font-size: .7rem;
    color: var(--text-muted);
    pointer-events: none;
    backdrop-filter: blur(8px);
    z-index: 10;
}

html[data-theme="light"] .hud-zoom-hint {
    background: rgba(255, 255, 255, .85);
}

.sphere-layer-hud {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: 16px;
    padding: .85rem 1.1rem;
    backdrop-filter: blur(14px);
    display: flex;
    align-items: center;
    gap: .65rem;
    z-index: 15;
    box-shadow: var(--shadow-elevation);
}

/* ===== GUIDE & FAQ ===== */
.guide-article {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: 24px;
    padding: 3rem;
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-elevation);
    margin-bottom: 3rem;
    line-height: 1.8;
    color: var(--text-main);
}

@media(max-width:768px) {
    .guide-article {
        padding: 1.75rem;
    }
}

.guide-article h2 {
    font-family: var(--font-display);
    font-size: 1.65rem;
    color: var(--accent);
    margin: 2.75rem 0 1.25rem;
    font-weight: 700;
    letter-spacing: -.4px;
    border-bottom: 2px solid var(--bg-card-border);
    padding-bottom: .6rem;
}

.guide-article h2:first-of-type {
    margin-top: 0;
}

.guide-article h3 {
    font-size: 1.2rem;
    color: var(--secondary-accent);
    margin: 1.8rem 0 .8rem;
    font-weight: 600;
}

.guide-article p {
    margin-bottom: 1.35rem;
    color: var(--text-secondary);
    font-size: .98rem;
}

.guide-article strong {
    color: var(--text-main);
}

.guide-article code {
    font-family: var(--font-mono);
    background: rgba(139, 92, 246, 0.12);
    color: var(--accent);
    padding: 0.15rem 0.45rem;
    border-radius: 6px;
    font-size: 0.88rem;
    border: 1px solid rgba(139, 92, 246, 0.25);
}

.guide-article ul,
.guide-article ol {
    margin-left: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.guide-article li {
    margin-bottom: .6rem;
}

.guide-callout {
    background: linear-gradient(135deg, rgba(139, 92, 246, .1), rgba(34, 211, 238, .07));
    border-left: 4px solid var(--accent);
    padding: 1.4rem;
    border-radius: 0 14px 14px 0;
    margin: 1.75rem 0;
    font-size: .98rem;
}

.table-container {
    overflow-x: auto;
    margin: 1.75rem 0 2.25rem;
}

.guide-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: .9rem;
    border-radius: 12px;
    overflow: hidden;
}

.guide-table th,
.guide-table td {
    padding: .85rem 1rem;
    border: 1px solid var(--bg-card-border);
}

.guide-table th {
    background: rgba(0, 0, 0, .25);
    color: var(--accent);
    font-weight: 700;
    text-transform: uppercase;
    font-size: .78rem;
    letter-spacing: .6px;
}

html[data-theme="light"] .guide-table th {
    background: rgba(0, 0, 0, .05);
}

/* ===== FAQ ===== */
.faq-item {
    border: 1px solid var(--bg-card-border);
    border-radius: 14px;
    margin-bottom: .85rem;
    overflow: hidden;
    background: rgba(0, 0, 0, .14);
    transition: border-color var(--transition);
}

html[data-theme="light"] .faq-item {
    background: rgba(0, 0, 0, .02);
}

.faq-item:hover {
    border-color: var(--accent);
}

.faq-header {
    padding: 1.1rem 1.35rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background .2s;
    width: 100%;
    background: none;
    border: none;
    color: var(--text-main);
    text-align: left;
    font-size: .95rem;
    font-family: var(--font-main);
}

.faq-header:hover {
    background: rgba(255, 255, 255, .04);
}

.faq-content {
    padding: 0 1.35rem 1.25rem;
    display: none;
    color: var(--text-secondary);
    font-size: .94rem;
    line-height: 1.7;
}

.faq-item.open .faq-content {
    display: block;
}

/* ===== PAGE SECTIONS ===== */
.page-section {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: 24px;
    padding: 2.75rem;
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-elevation);
    margin-bottom: 2.5rem;
}

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

.page-section h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 1.25rem;
    border-bottom: 2px solid var(--bg-card-border);
    padding-bottom: 0.5rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    max-width: 680px;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.form-row label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
}

.form-row input,
.form-row textarea {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--bg-card-border);
    color: var(--text-main);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-family: var(--font-main);
    font-size: 0.92rem;
    outline: none;
    transition: border-color 0.2s;
}

html[data-theme="light"] .form-row input,
html[data-theme="light"] .form-row textarea {
    background: #fff;
}

.form-row input:focus,
.form-row textarea:focus {
    border-color: var(--accent);
}

.submit-btn {
    background: linear-gradient(135deg, var(--accent), #6d28d9);
    color: #fff;
    padding: 0.75rem 1.75rem;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    width: fit-content;
    box-shadow: 0 4px 16px var(--accent-glow);
    transition: transform 0.2s;
    font-family: var(--font-main);
}

.submit-btn:hover {
    transform: translateY(-2px);
}

/* ===== FOOTER ===== */
footer {
    border-top: 1px solid var(--bg-card-border);
    padding: 2.5rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: .84rem;
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.footer-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.footer-nav a:hover {
    color: var(--accent);
}

/* ===== TOAST ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #0d1420;
    color: #e6edf5;
    border: 1px solid var(--accent);
    padding: .65rem 1.3rem;
    border-radius: 12px;
    font-size: .84rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, .5);
    opacity: 0;
    transition: all .4s cubic-bezier(.16, 1, .3, 1);
    z-index: 1000;
    pointer-events: none;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(139, 92, 246, .4);
    border-radius: 8px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* ===== RESPONSIVE ===== */
@media(max-width:480px) {
    .viewport-wrapper {
        min-height: 400px;
    }
    .sphere-layer-hud {
        bottom: 5rem;
        padding: .6rem .8rem;
        flex-wrap: wrap;
        gap: .4rem;
        right: .5rem;
        left: .5rem;
        border-radius: 12px;
        justify-content: center;
    }
    .sphere-layer-hud input[type="range"] {
        width: 80px;
    }
    .stage-toolbar {
        padding: .5rem .7rem;
    }
    .tool-group {
        gap: .25rem;
    }
    .tool-btn {
        padding: .3rem .5rem;
        font-size: .7rem;
    }
    .control-panel {
        padding: 1rem;
    }
    .container {
        padding: .75rem .9rem;
    }
    .brand-text h1 {
        font-size: 1.15rem;
    }
    .brand-text p {
        font-size: .68rem;
    }
    .hud-inspector {
        font-size: .62rem;
        padding: .3rem .6rem;
        bottom: .6rem;
        left: .6rem;
    }
    .hud-zoom-hint {
        font-size: .6rem;
        padding: .2rem .5rem;
        top: .6rem;
        right: .6rem;
    }
    .nav-actions .audio-toggle-btn,
    .nav-actions .theme-toggle-btn {
        padding: .35rem .6rem;
        font-size: .7rem;
    }
    .nav-actions .audio-toggle-btn span,
    .nav-actions .theme-toggle-btn span {
        font-size: .8rem;
    }
}

@media(max-width:768px) {
    .site-nav {
        display: none;
    }
    .mobile-menu-toggle {
        display: flex !important;
    }
    .nav-actions {
        gap: .4rem;
    }
    .nav-actions .audio-toggle-btn,
    .nav-actions .theme-toggle-btn {
        padding: .4rem .7rem;
        font-size: .75rem;
        border-radius: 10px;
    }
}

@media(min-width:769px) {
    .mobile-menu-toggle {
        display: none !important;
    }
    .mobile-menu-overlay {
        display: none !important;
    }
}

/* ===== MOBILE MENU OVERRIDES ===== */
.mobile-menu-toggle {
    display: none;
    background: linear-gradient(135deg, var(--bg-card), var(--bg-card-secondary));
    border: 1px solid var(--bg-card-border);
    border-radius: 12px;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1001;
    transition: all .3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, .2);
}

.mobile-menu-toggle:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(139, 92, 246, .3);
    transform: translateY(-1px);
}

.hamburger-line {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text-primary);
    margin: 3px auto;
    border-radius: 4px;
    transition: all .3s cubic-bezier(.68, -.55, .265, 1.55);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: translateY(5px) rotate(45deg);
}
.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(.5);
}
.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: translateY(-5px) rotate(-45deg);
}

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s ease, visibility .3s ease;
}

.mobile-menu-overlay.open {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-panel {
    position: fixed;
    top: 0;
    right: -360px;
    width: 320px;
    height: 100dvh;
    background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
    border-left: 1px solid var(--bg-card-border);
    box-shadow: -10px 0 50px rgba(0, 0, 0, .6);
    transition: right .4s cubic-bezier(.16, 1, .3, 1);
    display: flex;
    flex-direction: column;
    padding: 20px;
    overflow-y: auto;
    z-index: 1001;
}

.mobile-menu-overlay.open .mobile-menu-panel {
    right: 0;
}

.mobile-menu-close {
    background: rgba(255, 255, 255, .05);
    border: 1px solid var(--bg-card-border);
    border-radius: 10px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all .3s ease;
    align-self: flex-end;
    margin-bottom: 10px;
}

.mobile-menu-close:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    background: rgba(139, 92, 246, .1);
    transform: rotate(90deg);
}

.mobile-menu-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 0;
    border-bottom: 1px solid var(--bg-card-border);
    margin-bottom: 20px;
}

.mobile-menu-brand .brand-icon-small {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, #8b5cf6, #6d28d9);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(139, 92, 246, .4);
}

.mobile-menu-brand .brand-icon-small svg {
    width: 24px;
    height: 24px;
}

.mobile-menu-brand span {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -.5px;
}

.mobile-menu-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 20px;
    flex: 1;
}

.mobile-menu-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: .95rem;
    font-weight: 500;
    transition: all .25s ease;
    border: 1px solid transparent;
    background: rgba(255, 255, 255, .02);
}

.mobile-menu-nav a:hover {
    background: rgba(139, 92, 246, .12);
    color: var(--text-primary);
    border-color: var(--accent);
    transform: translateX(4px);
}

.mobile-menu-nav .menu-icon {
    font-size: 20px;
    width: 24px;
    text-align: center;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, .3));
}

.mobile-menu-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 15px;
    border-top: 1px solid var(--bg-card-border);
    margin-top: auto;
    background: rgba(255, 255, 255, .02);
    border-radius: 14px;
}

.mobile-menu-actions .audio-toggle-btn,
.mobile-menu-actions .theme-toggle-btn {
    width: 100%;
    justify-content: center;
    padding: 12px;
    border-radius: 12px;
    border: 1px solid var(--bg-card-border);
    background: rgba(255, 255, 255, .05);
    color: var(--text-primary);
    font-size: .85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-main);
}

.mobile-menu-actions .audio-toggle-btn:hover,
.mobile-menu-actions .theme-toggle-btn:hover {
    border-color: var(--accent);
    background: rgba(139, 92, 246, .15);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, .2);
}

.mobile-menu-footer {
    text-align: center;
    padding: 15px 0 5px;
    font-size: .72rem;
    color: var(--text-muted);
    border-top: 1px solid var(--bg-card-border);
    margin-top: 10px;
}

/* ===== PRINT ===== */
#printMetadata {
    display: none;
    padding: 1rem 1.5rem;
    background: #fff;
    color: #000;
    border-bottom: 2px solid #8b5cf6;
}

#printMetadata h2 {
    margin: 0 0 .4rem 0;
    font-family: var(--font-display);
    color: #7c3aed;
    font-size: 1.3rem;
}

#printMetadata p {
    margin: 0;
    font-family: var(--font-mono);
    font-size: .9rem;
}

@media print {
    body {
        background: #fff !important;
        color: #000 !important;
    }
    .control-panel,
    .stage-toolbar,
    header,
    footer,
    .ambient-glow,
    .hud-inspector,
    .hud-zoom-hint,
    .sphere-layer-hud,
    .progress-hud,
    .guide-article,
    .page-section,
    .toast,
    .brand-group,
    .nav-actions,
    .tool-btn {
        display: none !important;
    }
    .container {
        max-width: 100% !important;
        padding: 0 !important;
    }
    .studio-grid {
        display: block !important;
    }
    .canvas-stage {
        border: none !important;
        box-shadow: none !important;
        border-radius: 0 !important;
        backdrop-filter: none !important;
        min-height: 0 !important;
        overflow: visible !important;
    }
    #printMetadata {
        display: block !important;
    }
    .viewport-wrapper {
        position: static !important;
        overflow: visible !important;
        min-height: auto !important;
        height: auto !important;
    }
    canvas {
        position: static !important;
        width: 100% !important;
        height: auto !important;
        max-width: 100% !important;
        background: #ffffff !important;
        filter: grayscale(100%) invert(100%) contrast(150%) !important;
    }
    .sphere-layer-hud {
        display: none !important;
    }
}
      
  }