/* 
   Aviation Textbook Layout CSS
   Theme: High-End Aviation Manual (Sample Page Style)
   Author: Capt. Pankaj Pahil
   Watermark: www.ghostaviator.com
*/

/* Security Rules to prevent copy-paste of textbook content */
body {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

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

:root {
    --primary: #0F172A;
    --secondary: #2563EB;
    --accent: #F59E0B;
    --card-bg: #FFFFFF;
    --border: #E2E8F0;
    --success: #10B981;
    --danger: #EF4444;
    --text-muted: #64748b;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: #F8FAFC;
    color: #1e293b;
    line-height: 1.8;
    font-size: 16.5px;
}

.container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 40px;
    position: relative;
    z-index: 10;
}

/* Navbar */
.navbar {
    background: var(--primary);
    color: white;
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}
.navbar-brand {
    font-weight: 800;
    font-size: 1.2rem;
}
.nav-user {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Hero Banner */
.hero-banner {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: white;
    padding: 60px 50px;
    border-radius: 12px;
    margin-bottom: 50px;
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
}
.hero-label {
    background: #e2e8f0;
    color: var(--primary);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 1px;
    display: inline-block;
    margin-bottom: 20px;
}
.hero-title {
    font-size: 3rem;
    font-weight: 900;
    margin: 0 0 20px 0;
    line-height: 1.1;
}
.hero-subtitle {
    font-size: 1.15rem;
    color: #94a3b8;
    max-width: 800px;
}

.intro-text {
    font-size: 1.15rem;
    line-height: 1.8;
    margin-bottom: 40px;
}

/* Headings */
h2 {
    font-size: 2.2rem;
    color: var(--primary);
    margin: 80px 0 30px 0;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 15px;
}
h2::before {
    content: '';
    display: block;
    width: 6px;
    height: 35px;
    background: var(--secondary);
    border-radius: 4px;
}
h3 {
    font-size: 1.4rem;
    color: var(--primary);
    margin-top: 40px;
    margin-bottom: 15px;
    font-weight: 700;
}
p {
    margin-bottom: 25px;
}
strong {
    color: var(--primary);
    font-weight: 700;
}

/* Callout Boxes */
.callout {
    padding: 25px 30px;
    border-radius: 10px;
    margin: 40px 0;
    background: var(--card-bg);
    border: 1px solid var(--border);
}
.callout-title {
    font-weight: 800;
    margin-bottom: 12px;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
    text-transform: uppercase;
}
.box-blue {
    border-left: 6px solid var(--secondary);
    background: #eff6ff;
}
.box-blue .callout-title {
    color: var(--secondary);
}
.box-red {
    border-left: 6px solid var(--danger);
    background: #fef2f2;
}
.box-red .callout-title {
    color: var(--danger);
}
.box-amber {
    border-left: 6px solid var(--accent);
    background: #fffbeb;
}
.box-amber .callout-title {
    color: #b45309;
}

/* Table styling */
.table-container {
    margin: 30px 0;
    background: white;
    border-radius: 8px;
    border: 1px solid var(--border);
    overflow: hidden;
}
.table-caption {
    font-size: 0.95rem;
    color: white;
    background: var(--primary);
    padding: 12px 20px;
    font-weight: 600;
}
table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}
th, td {
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}
th {
    background: #f8fafc;
    font-weight: 700;
    color: var(--primary);
    font-size: 1rem;
}
td:first-child {
    font-weight: 600;
    color: var(--primary);
    width: 30%;
}

/* Custom Flowcharts */
.flowchart {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 40px 0;
    background: white;
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border);
}
.flow-top {
    background: var(--primary);
    color: white;
    padding: 15px 40px;
    border-radius: 8px;
    font-weight: 800;
    margin-bottom: 30px;
    font-size: 1.2rem;
}
.flow-branches {
    display: flex;
    gap: 40px;
    width: 100%;
    justify-content: center;
}
.flow-box {
    flex: 1;
    max-width: 400px;
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 25px;
    text-align: center;
}
.flow-box-title {
    font-weight: 800;
    font-size: 1.1rem;
    margin-bottom: 15px;
}

/* Figures */
.cinematic-figure {
    margin: 60px 0;
    text-align: center;
}
.cinematic-figure img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
}
.cinematic-figure figcaption {
    margin-top: 15px;
    font-size: 1rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Self-Test / Quiz Interactivity */
.self-test-section {
    background: white;
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 50px;
    margin-top: 80px;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05);
}
.self-test-header {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 20px;
}
.question-block {
    margin-bottom: 45px;
}
.question-text {
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 20px;
}
.options-list {
    list-style: none;
    margin-bottom: 20px;
}
.options-list li {
    margin-bottom: 12px;
    padding: 15px 20px;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: 0.2s;
}
.options-list li:hover {
    background: #f8fafc;
    border-color: #cbd5e1;
}
.options-list li.correct {
    background-color: #E8F5E9 !important;
    border-color: #4CAF50 !important;
    color: #2E7D32 !important;
    font-weight: 600 !important;
}
.options-list li.incorrect {
    background-color: #FFEBEE !important;
    border-color: #EF5350 !important;
    color: #C62828 !important;
}
.reveal-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s;
}
.reveal-btn:hover {
    background: var(--secondary);
}
.answer-block {
    display: none;
    margin-top: 20px;
    padding: 25px;
    background: #f0fdf4;
    border-left: 5px solid var(--success);
    border-radius: 0 8px 8px 0;
    font-size: 1.1rem;
}
.answer-block strong {
    color: #065f46;
    display: block;
    margin-bottom: 10px;
}

/* Nav Buttons for Chapter Traversal */
.nav-buttons {
    display: flex;
    justify-content: space-between;
    margin: 30px 0;
}
.nav-btn {
    background: var(--primary);
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: background-color 0.2s;
}
.nav-btn:hover {
    background: var(--secondary);
}

/* Running Footer */
.book-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border);
    padding: 25px 0;
    margin-top: 80px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Print Overrides */
@media print {
    body {
        background: white;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    .container {
        max-width: 100%;
        margin: 0;
        padding: 0;
    }
    .navbar, .reveal-btn, .nav-buttons {
        display: none !important;
    }
    .hero-banner {
        color: black;
        background: white !important;
        padding: 40px 0;
        border-bottom: 2px solid black;
        box-shadow: none;
        border-radius: 0;
    }
    .hero-subtitle {
        color: #333;
    }
    .callout {
        border: 1px solid #000 !important;
        box-shadow: none;
        background-color: rgba(0, 0, 0, 0.02) !important;
    }
    .table-container {
        border: 1px solid #000 !important;
    }
    .options-list li.correct-option {
        background-color: #E8F5E9 !important;
        border-color: #4CAF50 !important;
        color: #2E7D32 !important;
        font-weight: bold !important;
    }
    .answer-block {
        display: block !important;
        border: 1px solid #ccc !important;
        background: white !important;
    }
    .self-test-section {
        border: none;
        padding: 0;
        box-shadow: none;
        page-break-before: auto;
    }
    .question-block {
        page-break-inside: avoid;
    }
    .cinematic-figure {
        page-break-inside: avoid;
    }
    details, details.oral-expandable {
        display: block !important;
    }
    details .oral-answer, details.oral-expandable .oral-answer {
        display: block !important;
    }
}