:root {
    --q-primary: #6366f1;
    --q-primary-dark: #4f46e5;
    --q-secondary: #a855f7;
    --q-accent: #06b6d4;
    --q-bg: #f8fafc;
    --q-surface: rgba(255, 255, 255, 0.9);
    --q-text: #1e293b;
    --q-text-muted: #64748b;
    --q-success: #10b981;
    --q-error: #ef4444;
    --q-border: rgba(226, 232, 240, 0.6);
    --q-radius: 16px;
    --q-shadow: 0 15px 25px -5px rgba(0, 0, 0, 0.04), 0 8px 10px -5px rgba(0, 0, 0, 0.01);
    --q-glass: blur(10px);
}

/* Compact Portal Layout */
.quantum-portal-layout {
    padding: 30px 0;
    min-height: 70vh;
    background: #fbfbfc;
}

.quantum-quiz-container {
    width: 100%;
    max-width: 720px;
    /* Slimmer for cleaner look */
    margin: 0 auto;
    background: var(--q-surface);
    backdrop-filter: var(--q-glass);
    border-radius: var(--q-radius);
    padding: 35px 40px;
    box-shadow: var(--q-shadow);
    border: 1px solid var(--q-border);
    text-align: left;
}

/* Header Refinement */
.quantum-quiz-header {
    margin-bottom: 25px;
}

.quantum-header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.quantum-quiz-title {
    font-size: 1.15rem;
    /* Clean, not too big */
    font-weight: 800;
    color: #0f172a;
    letter-spacing: -0.01em;
}

.quantum-timer {
    background: #fff1f2;
    color: #e11d48;
    padding: 6px 12px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 12px;
    /* Small font size */
    display: flex;
    align-items: center;
    gap: 6px;
    border: 1px solid #fecdd3;
}

.quantum-progress-wrapper {
    background: #f1f5f9;
    height: 6px;
    border-radius: 10px;
    overflow: hidden;
}

.quantum-progress-bar {
    height: 100%;
    background: var(--q-primary);
    transition: width 0.4s ease;
}

/* Clean Question UI */
.quantum-question-text {
    font-size: 17px;
    /* 16-18px range */
    font-weight: 700;
    /* Bold */
    color: #0f172a;
    line-height: 1.4;
    margin-bottom: 30px;
}

.quantum-options-list {
    display: grid;
    gap: 12px;
}

.quantum-option-btn {
    background: #fff;
    border: 1px solid #e2e8f0;
    padding: 14px 18px;
    border-radius: 10px;
    font-size: 13px;
    /* 12-13px text size */
    font-weight: 500;
    color: #334155;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    text-align: left;
}

.quantum-option-btn:hover {
    border-color: var(--q-primary);
    background: #f8fafc;
}

.quantum-option-btn.selected {
    border-color: var(--q-primary);
    background: #f5f3ff;
    color: var(--q-primary-dark);
}

.opt-label {
    width: 26px;
    height: 26px;
    background: #f1f5f9;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 14px;
    font-size: 11px;
    font-weight: 800;
    color: #64748b;
    flex-shrink: 0;
}

.quantum-option-btn.selected .opt-label {
    background: var(--q-primary);
    color: #fff;
}

/* Compact Buttons */
.quantum-quiz-footer {
    margin-top: 35px;
    padding-top: 20px;
    border-top: 1px solid #f1f5f9;
    display: flex;
    justify-content: flex-end;
    gap: 15px;
}

.quantum-btn {
    padding: 10px 22px;
    border-radius: 8px;
    font-size: 12px;
    /* 12px button text */
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.quantum-btn-primary {
    background: var(--q-primary);
    color: #fff;
}

.quantum-btn-secondary {
    background: #f1f5f9;
    color: #475569;
}

/* Instructions Refinement */
.quantum-instruction-screen h2 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
}

.quantum-instruction-list li {
    background: #f8fafc;
    padding: 12px 18px;
    border-radius: 8px;
    font-size: 12px;
    /* Small font size */
    color: #475569;
    margin-bottom: 8px;
    border-left: 3px solid var(--q-primary);
}

/* Review / Results Refinement */
.quantum-score-circle {
    width: 100px;
    height: 100px;
    font-size: 24px;
    border-width: 6px;
    margin-bottom: 25px;
}

.quantum-review-item {
    padding: 20px 0;
    border-bottom: 1px solid #f1f5f9;
}

.quantum-review-item .quantum-question-text {
    font-size: 15px;
    /* Slightly smaller for review */
    margin-bottom: 15px;
}

.quantum-options-review p {
    font-size: 12px;
    /* Compact review text */
    margin: 5px 0;
}

.quantum-explanation {
    margin-top: 15px;
    padding: 15px;
    font-size: 12px;
    /* Compact explanation */
    background: #f0fdf4;
    border-radius: 8px;
    border-left: 4px solid var(--q-success);
}

.status-badge {
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 700;
    text-transform: uppercase;
    margin-left: 10px;
}

.badge-correct {
    background: #dcfce7;
    color: #166534;
}

.badge-wrong {
    background: #fee2e2;
    color: #991b1b;
}

/* Portal Layout (Material) */
.portal-badge {
    font-size: 11px;
    padding: 4px 10px;
}

.portal-title {
    font-size: 1.5rem;
    text-align: left;
}

.meta-item {
    font-size: 12px;
}

.quantum-portal-content {
    font-size: 15px;
    line-height: 1.6;
    text-align: left;
}

/* Animations */
.fadeIn {
    animation: q-fadeIn 0.5s ease;
}

.slide-in {
    animation: q-slideIn 0.4s ease;
}

@keyframes q-fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes q-slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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