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

    :root {
        --bg: #0a0a0f;
        --surface: #111118;
        --surface2: #18181f;
        --border: rgba(255, 255, 255, 0.07);
        --purple: #8b5cf6;
        --purple-bright: #a78bfa;
        --red: #ef4444;
        --text: #f1f0f5;
        --muted: #6b6a7a;
        --timer-orange: #f97316;
    }

    body {
        font-family: 'Syne', sans-serif;
        background: var(--bg);
        color: var(--text);
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }

    /* ── Header ── */
    header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 28px;
        border-bottom: 1px solid var(--border);
        position: sticky;
        top: 0;
        z-index: 10;
        background: rgba(10, 10, 15, 0.85);
        backdrop-filter: blur(12px);
    }

    .back-btn {
        width: 36px;
        height: 36px;
        background: var(--surface2);
        border: 1px solid var(--border);
        border-radius: 8px;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text);
        transition: background 0.2s;
    }

    .back-btn:hover {
        background: #22222e;
    }

    .back-btn svg {
        width: 16px;
        height: 16px;
    }

    header h1 {
        font-size: 1rem;
        font-weight: 700;
        letter-spacing: 0.02em;
        color: var(--text);
    }

    .header-spacer {
        width: 36px;
    }

    /* ── Main Layout ── */
    .layout {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: 28px;
        padding: 28px;
        flex: 1;
        max-width: 1200px;
        width: 100%;
        margin: 0 auto;
    }

    /* ── Progress ── */
    .progress-section {
        margin-bottom: 20px;
    }

    .progress-meta {
        display: flex;
        justify-content: space-between;
        font-size: 0.78rem;
        color: var(--muted);
        font-family: 'Space Mono', monospace;
        margin-bottom: 8px;
        letter-spacing: 0.04em;
    }

    .progress-bar-track {
        height: 4px;
        background: var(--surface2);
        border-radius: 99px;
        overflow: hidden;
    }

    .progress-bar-fill {
        height: 100%;
        width: 10%;
        background: var(--purple);
        border-radius: 99px;
        transition: width 0.5s ease;
        box-shadow: 0 0 12px rgba(139, 92, 246, 0.6);
    }

    /* ── Question Card ── */
    .question-card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 14px;
        padding: 24px;
        margin-bottom: 16px;
    }

    .question-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 20px;
    }

    .points-badge {
        background: var(--purple);
        color: #fff;
        font-size: 0.72rem;
        font-weight: 700;
        padding: 4px 12px;
        border-radius: 99px;
        letter-spacing: 0.05em;
        font-family: 'Space Mono', monospace;
    }

    .timer {
        display: flex;
        align-items: center;
        gap: 6px;
        color: var(--timer-orange);
        font-family: 'Space Mono', monospace;
        font-size: 0.9rem;
        font-weight: 700;
    }

    .timer svg {
        width: 16px;
        height: 16px;
    }

    .difficulty-badge {
        background: var(--surface2);
        border: 1px solid var(--border);
        color: var(--muted);
        font-size: 0.72rem;
        padding: 4px 12px;
        border-radius: 99px;
        letter-spacing: 0.05em;
        font-family: 'Space Mono', monospace;
    }

    .question-text {
        font-size: 1.2rem;
        font-weight: 700;
        line-height: 1.5;
        color: var(--text);
    }

    /* ── Options ── */
    .options-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px;
        margin-bottom: 20px;
    }

    .option {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 12px;
        padding: 16px 20px;
        cursor: pointer;
        display: flex;
        align-items: center;
        gap: 14px;
        transition: border-color 0.2s, background 0.2s, transform 0.1s;
        position: relative;
        overflow: hidden;
    }

    .option::before {
        content: '';
        position: absolute;
        inset: 0;
        background: var(--purple);
        opacity: 0;
        transition: opacity 0.2s;
    }

    .option:hover {
        border-color: rgba(139, 92, 246, 0.5);
        transform: translateY(-1px);
    }

    .option:hover::before {
        opacity: 0.05;
    }

    .option.selected {
        border-color: var(--purple);
        background: rgba(139, 92, 246, 0.12);
    }

    .option.correct {
        border-color: #22c55e;
        background: rgba(34, 197, 94, 0.1);
    }

    .option.wrong {
        border-color: var(--red);
        background: rgba(239, 68, 68, 0.1);
    }

    .option-label {
        width: 28px;
        height: 28px;
        background: var(--surface2);
        border-radius: 6px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-family: 'Space Mono', monospace;
        font-size: 0.72rem;
        font-weight: 700;
        color: var(--muted);
        flex-shrink: 0;
        z-index: 1;
        transition: background 0.2s, color 0.2s;
    }


    .option-text {
        font-size: 0.92rem;
        font-weight: 600;
        z-index: 1;
        color: var(--text);
    }

    /* ── Footer Actions ── */
    .actions {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    #skip-btn {
        background: transparent;
        border: 1px solid var(--border);
        color: var(--muted);
        font-family: 'Syne', sans-serif;
        font-size: 0.82rem;
        font-weight: 600;
        padding: 10px 18px;
        border-radius: 9px;
        cursor: pointer;
        display: flex;
        align-items: center;
        gap: 7px;
        transition: border-color 0.2s, color 0.2s;
    }

    #skip-btn:hover {
        border-color: var(--muted);
        color: var(--text);
    }

    #skip-btn svg {
        width: 14px;
        height: 14px;
    }

    #next-btn {
        background: var(--purple);
        color: #fff;
        border: none;
        font-family: 'Syne', sans-serif;
        font-size: 0.88rem;
        font-weight: 700;
        padding: 12px 26px;
        border-radius: 9px;
        cursor: pointer;
        display: flex;
        align-items: center;
        gap: 8px;
        transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
        letter-spacing: 0.02em;
        box-shadow: 0 0 18px rgba(139, 92, 246, 0.35);
    }

    #next-btn:hover {
        background: var(--purple-bright);
        transform: translateY(-1px);
        box-shadow: 0 0 28px rgba(167, 139, 250, 0.5);
    }

    #next-btn:active {
        transform: translateY(0);
    }

    #next-btn svg {
        width: 14px;
        height: 14px;
    }

    .stats-sidebar {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 90px;
        right: 180px;
    }

    .stats-card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 14px;
        overflow: hidden;
    }

    .stats-title {
        padding: 16px 20px;
        font-size: 0.95rem;
        font-weight: 700;
        border-bottom: 1px solid var(--border);
        letter-spacing: 0.02em;
    }

    .stat-item {
        padding: 16px 20px;
        border-bottom: 1px solid var(--border);
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 4px;
        text-align: center;
    }

    .stat-item:last-child {
        border-bottom: none;
    }

    .stat-label {
        font-size: 0.75rem;
        color: var(--muted);
        font-family: 'Space Mono', monospace;
        letter-spacing: 0.06em;
        text-transform: uppercase;
    }

    .stat-value {
        font-size: 1.4rem;
        font-weight: 800;
        color: var(--purple-bright);
        font-family: 'Space Mono', monospace;
    }

    .stat-value.white {
        color: var(--text);
    }

    .hearts {
        display: flex;
        gap: 4px;
    }

    .heart {
        color: var(--red);
        font-size: 1.2rem;
        filter: drop-shadow(0 0 6px rgba(239, 68, 68, 0.5));
    }

    /* ── Glow BG ── */
    body::after {
        content: '';
        position: fixed;
        bottom: 0;
        right: 0;
        width: 500px;
        height: 400px;
        background: radial-gradient(ellipse at bottom right, rgba(20, 80, 30, 0.18) 0%, transparent 70%);
        pointer-events: none;
        z-index: 0;
    }

    .layout {
        position: relative;
        z-index: 1;
    }

    /* ── Responsive ── */
    @media (max-width: 768px) {
        .layout {
            grid-template-columns: 1fr;
            padding: 16px;
        }

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

        .stats-sidebar {
            order: -1;
        }

        .stats-card {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
        }

        .stats-title {
            grid-column: 1 / -1;
        }
    }

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

    :root {
        --bg: #0a0a0f;
        --surface: #111118;
        --surface2: #18181f;
        --border: rgba(255, 255, 255, 0.07);
        --purple: #8b5cf6;
        --purple-bright: #a78bfa;
        --red: #ef4444;
        --text: #f1f0f5;
        --muted: #6b6a7a;
    }

    body {
        font-family: 'Syne', sans-serif;
        background: var(--bg);
        color: var(--text);
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        overflow: hidden;
        position: relative;
    }

    /* Ambient glows */
    body::before {
        content: '';
        position: fixed;
        top: -120px;
        left: 50%;
        transform: translateX(-50%);
        width: 700px;
        height: 400px;
        background: radial-gradient(ellipse, rgba(139, 92, 246, 0.12) 0%, transparent 70%);
        pointer-events: none;
    }

    body::after {
        content: '';
        position: fixed;
        bottom: -80px;
        right: -80px;
        width: 500px;
        height: 400px;
        background: radial-gradient(ellipse at bottom right, rgba(20, 80, 30, 0.15) 0%, transparent 70%);
        pointer-events: none;
    }

    /* Header */
    header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 28px;
        border-bottom: 1px solid var(--border);
        background: rgba(10, 10, 15, 0.85);
        backdrop-filter: blur(12px);
        z-index: 10;
    }

 .back-btn {
    border: none;
     cursor: pointer;
     display: flex;
     align-items: center;
     justify-content: center;
 }



 .back-btn img{
    width: 32px;
    height: 32px;
 }

   h1{
    position: relative;
    right: 120px;
   }

    .header-spacer {
        width: 36px;
    }

    /* Card */
    .card {
        position: relative;
        z-index: 1;
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 20px;
        padding: 48px 44px;
        width: 100%;
        max-width: 500px;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 28px;
        text-align: center;
        animation: fadeUp 0.5s ease both;
    }

    @keyframes fadeUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* Icon */
    .icon-wrap {
        width: 72px;
        height: 72px;
        background: rgba(139, 92, 246, 0.12);
        border: 1px solid rgba(139, 92, 246, 0.25);
        border-radius: 18px;
        display: flex;
        align-items: center;
        justify-content: center;
        animation: pulse-border 3s ease-in-out infinite;
    }

    .icon-wrap svg {
        width: 34px;
        height: 34px;
        color: var(--purple-bright);
    }

    @keyframes pulse-border {

        0%,
        100% {
            box-shadow: 0 0 0 0 rgba(139, 92, 246, 0);
        }

        50% {
            box-shadow: 0 0 0 8px rgba(139, 92, 246, 0.08);
        }
    }

    /* Text */
    .card-title {
        font-size: 1.6rem;
        font-weight: 800;
        line-height: 1.25;
        letter-spacing: -0.01em;
    }

    .card-sub {
        font-size: 0.85rem;
        color: var(--muted);
        line-height: 1.6;
        font-weight: 400;
        margin-top: -12px;
    }

    /* Meta pills */
    .meta-row {
        display: flex;
        gap: 10px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .meta-pill {
        background: var(--surface2);
        border: 1px solid var(--border);
        border-radius: 99px;
        padding: 6px 14px;
        font-family: 'Space Mono', monospace;
        font-size: 0.72rem;
        color: var(--muted);
        display: flex;
        align-items: center;
        gap: 6px;
        letter-spacing: 0.04em;
    }

    .meta-pill svg {
        width: 12px;
        height: 12px;
    }

    .meta-pill .dot {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--purple);
        flex-shrink: 0;
    }

    .meta-pill .dot.green {
        background: #22c55e;
    }

    /* Divider */
    .divider {
        width: 100%;
        height: 1px;
        background: var(--border);
    }

    /* Start button */
    .start-btn {
        width: 100%;
        background: var(--purple);
        color: #fff;
        border: none;
        font-family: 'Syne', sans-serif;
        font-size: 1rem;
        font-weight: 800;
        padding: 16px 32px;
        border-radius: 12px;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        letter-spacing: 0.03em;
        transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
        box-shadow: 0 0 24px rgba(139, 92, 246, 0.4);
        position: relative;
        overflow: hidden;
    }
        .start-btn a {
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            justify-content: center;
        }

    .start-btn::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
        pointer-events: none;
    }

    .start-btn:hover {
        background: var(--purple-bright);
        transform: translateY(-2px);
        box-shadow: 0 0 36px rgba(167, 139, 250, 0.55);
    }

    .start-btn:active {
        transform: translateY(0);
    }

    .start-btn svg {
        width: 18px;
        height: 18px;
        transition: transform 0.2s;
    }

    .start-btn:hover svg {
        transform: translateX(3px);
    }

    /* Note */
    .note {
        font-family: 'Space Mono', monospace;
        font-size: 0.7rem;
        color: var(--muted);
        letter-spacing: 0.04em;
    }