/* ============================================================
   PRACTICE STATIC PAGES — Styles
   ============================================================
   Used by: practice/section-*.html, practice/*-topic.html
   Provides: hero, MCQ cards, answer reveals, related topics
   ============================================================ */

/* --- Hero Banner --- */
.practice-hero {
    background: linear-gradient(135deg, #1E40AF 0%, #2563EB 60%, #3B82F6 100%);
    padding: 2.5rem 1.5rem 3rem;
    position: relative;
    overflow: hidden;
}

.practice-hero::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -5%;
    width: 350px;
    height: 350px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    pointer-events: none;
}

.practice-hero .container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.practice-hero .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.25rem;
}

.practice-hero .breadcrumb a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
}

.practice-hero .breadcrumb a:hover {
    color: #fff;
    text-decoration: underline;
}

.practice-hero .breadcrumb span {
    color: rgba(255, 255, 255, 0.7);
}

.practice-tag {
    display: inline-block;
    padding: 0.25rem 0.7rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.35);
    margin-bottom: 1rem;
}

.practice-hero h1 {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    line-height: 1.3;
    margin: 0 0 1.25rem;
}

.practice-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9rem;
}

.practice-meta i {
    margin-right: 0.35rem;
    color: rgba(255, 255, 255, 0.7);
}

/* --- Main Layout --- */
.practice-static-page {
    padding: 2rem 0 4rem;
    background: #F8FAFC;
}

.practice-static-page .container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- AdSense Wrapper --- */
.ad-wrap {
    margin: 1.5rem 0;
    text-align: center;
}

/* --- MCQ Intro --- */
.mcq-intro {
    background: #fff;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid #E2E8F0;
}

.mcq-intro p {
    color: #475569;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.mcq-cta-inline {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.mcq-cta-inline a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--primary-color);
    background: #EFF6FF;
    border: 1px solid #BFDBFE;
    transition: all 0.2s;
}

.mcq-cta-inline a:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

/* --- MCQ Cards --- */
.mcq-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.mcq-card {
    background: #fff;
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid #E2E8F0;
    box-shadow: 0 1px 4px rgba(30, 64, 175, 0.04);
    transition: border-color 0.2s;
}

.mcq-card:hover {
    border-color: #BFDBFE;
}

.mcq-number {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.6rem;
}

.mcq-question {
    font-size: 1.05rem;
    line-height: 1.7;
    color: #1E293B;
    margin-bottom: 1rem;
    font-weight: 500;
}

.mcq-question pre {
    background: #1E293B;
    color: #E2E8F0;
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.88rem;
    margin: 0.75rem 0;
    font-family: 'Consolas', 'Monaco', monospace;
}

.mcq-question code {
    font-family: 'Consolas', 'Monaco', monospace;
    background: #F1F5F9;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-size: 0.92em;
    color: #DC2626;
}

/* --- Options --- */
.mcq-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.mcq-option {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.7rem 1rem;
    border-radius: 8px;
    border: 1px solid #E2E8F0;
    background: #F8FAFC;
    transition: all 0.15s;
}

.mcq-option:hover {
    border-color: #BFDBFE;
    background: #EFF6FF;
}

.mcq-option.mcq-correct {
    border-color: #86EFAC;
    background: #F0FDF4;
}

.mcq-opt-label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    font-size: 0.78rem;
    font-weight: 700;
    color: #64748B;
    background: #fff;
    border: 2px solid #CBD5E1;
    flex-shrink: 0;
}

.mcq-correct .mcq-opt-label {
    background: #22C55E;
    color: #fff;
    border-color: #22C55E;
}

.mcq-opt-text {
    color: #334155;
    font-size: 0.95rem;
    line-height: 1.5;
    padding-top: 0.15rem;
}

.mcq-correct .mcq-opt-text {
    color: #166534;
    font-weight: 600;
}

/* --- Answer/Explanation (details/summary) --- */
.mcq-answer {
    border-top: 1px solid #E2E8F0;
    padding-top: 0.75rem;
}

.mcq-answer summary {
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--primary-color);
    padding: 0.4rem 0;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    list-style: none;
    user-select: none;
    transition: color 0.2s;
}

.mcq-answer summary::-webkit-details-marker {
    display: none;
}

.mcq-answer summary:hover {
    color: #1E40AF;
}

.mcq-answer[open] summary {
    margin-bottom: 0.75rem;
}

.mcq-answer-content {
    background: #F0FDF4;
    border: 1px solid #BBF7D0;
    border-radius: 8px;
    padding: 1rem 1.25rem;
}

.mcq-correct-text {
    font-size: 0.92rem;
    color: #166534;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.mcq-correct-text i {
    color: #22C55E;
}

.mcq-explanation {
    font-size: 0.9rem;
    color: #475569;
    line-height: 1.6;
}

/* --- Section Index: Subjects Grid --- */
.subjects-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.subject-card {
    background: #fff;
    border-radius: 14px;
    padding: 1.5rem;
    border: 1px solid #E2E8F0;
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.05);
}

.subject-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #EFF6FF;
}

.subject-card-header h3 {
    font-size: 1.15rem;
    color: #1E293B;
    font-weight: 700;
}

.subject-count {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-color);
    background: #EFF6FF;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
}

.subject-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.topic-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.85rem;
    border-radius: 8px;
    font-size: 0.85rem;
    text-decoration: none;
    color: #334155;
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    transition: all 0.2s;
}

.topic-pill:hover {
    background: #EFF6FF;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.topic-pill i {
    font-size: 0.65rem;
    color: #94A3B8;
}

.topic-pill:hover i {
    color: var(--primary-color);
}

.topic-pill span {
    font-size: 0.75rem;
    color: #94A3B8;
    margin-left: 0.15rem;
}

/* --- Related Topics --- */
.related-topics {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #EFF6FF;
}

.related-topics h3 {
    font-size: 1.1rem;
    color: #1E293B;
    margin-bottom: 1rem;
    font-weight: 700;
}

.related-topics h3 i {
    color: var(--primary-color);
    margin-right: 0.4rem;
}

.related-topics-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-bottom: 2rem;
}

.related-topic-card {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.1rem;
    border-radius: 8px;
    text-decoration: none;
    color: #334155;
    background: #fff;
    border: 1px solid #E2E8F0;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}

.related-topic-card:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: #EFF6FF;
    transform: translateX(3px);
}

.related-topic-card i {
    font-size: 0.7rem;
    color: #94A3B8;
    transition: color 0.2s;
}

.related-topic-card:hover i {
    color: var(--primary-color);
}

/* --- CTA Banner --- */
.mcq-cta-banner {
    background: linear-gradient(135deg, #1E3A8A 0%, #1E40AF 50%, #2563EB 100%);
    color: #fff;
    border-radius: 14px;
    padding: 2rem;
    text-align: center;
    margin-top: 2rem;
    box-shadow: 0 4px 20px rgba(30, 64, 175, 0.25);
}

.mcq-cta-banner h3 {
    color: #fff;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.mcq-cta-banner p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
}

.mcq-cta-banner a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #fff;
    color: var(--primary-color);
    padding: 0.7rem 2rem;
    border-radius: 8px;
    font-weight: 700;
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.mcq-cta-banner a:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .practice-hero {
        padding: 2rem 1rem 2.5rem;
    }

    .practice-hero h1 {
        font-size: 1.4rem;
    }

    .practice-meta {
        gap: 0.75rem;
        font-size: 0.82rem;
    }

    .practice-static-page {
        padding: 1.5rem 0 3rem;
    }

    .mcq-card {
        padding: 1.25rem;
    }

    .mcq-question {
        font-size: 0.97rem;
    }

    .mcq-option {
        padding: 0.6rem 0.8rem;
    }

    .mcq-opt-label {
        width: 24px;
        height: 24px;
        font-size: 0.72rem;
    }

    .subject-card {
        padding: 1.25rem;
    }

    .topic-pill {
        font-size: 0.8rem;
        padding: 0.35rem 0.7rem;
    }

    .mcq-cta-banner {
        padding: 1.5rem 1.25rem;
    }
}

@media (max-width: 480px) {
    .practice-hero h1 {
        font-size: 1.2rem;
    }

    .mcq-card {
        padding: 1rem;
        border-radius: 10px;
    }

    .related-topic-card {
        width: 100%;
    }
}