/* ==========================================================================
   Variables Globales & Typographie
   ========================================================================== */
:root {
    --font-title: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-body: 'Corbel', 'Lucida Grande', 'Lucida Sans Unicode', sans-serif;
    
    --color-primary: #00A896;      /* Turquoise principal */
    --color-secondary: #028090;    /* Turquoise foncé */
    --color-dark: #2F3E46;         /* Anthracite */
    --color-light: #F8F9FA;
    --color-white: #FFFFFF;
    --color-border: #E9ECEF;
    --color-juris: #E0F2F1;
    --color-enjeux: #FFF3CD;
    --color-cas: #F4F0EA;          /* Fond doux pour le cas pratique */
}

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

body {
    font-family: var(--font-body);
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-light);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Titles Segoe Turquoise */
h1, h2, h3, h4, .title-salient {
    font-family: var(--font-title);
    color: var(--color-primary);
    font-weight: 600;
}

/* Header */
.top-bar {
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: 0.8rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 10;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-titles h1 {
    color: var(--color-primary);
    font-size: 1.5rem;
}

.header-titles .subtitle {
    font-size: 0.9rem;
    color: #ADB5BD;
    font-style: italic;
}

.controls {
    display: flex;
    gap: 0.8rem;
}

.btn-control {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    padding: 0.5rem 1rem;
    font-family: var(--font-title);
    font-size: 0.95rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-control:hover { background-color: var(--color-secondary); }
.btn-pdf { background-color: #D97706; }
.btn-pdf:hover { background-color: #B45309; }

/* Main Layout */
.main-container {
    display: flex;
    flex: 1;
    height: calc(100vh - 65px);
}

.sidebar {
    width: 290px;
    background-color: var(--color-white);
    border-right: 1px solid var(--color-border);
    padding: 1.2rem 1rem;
    overflow-y: auto;
}

.nav-section-title {
    font-family: var(--font-title);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-secondary);
    margin: 1.2rem 0 0.4rem 0;
    font-weight: bold;
}

.nav-subsection-title {
    font-family: var(--font-title);
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
    color: var(--color-primary);
    margin: 0.8rem 0 0.3rem 0.5rem;
    letter-spacing: 0.5px;
}

.nav-highlight {
    color: #D97706;
    margin-top: 1.8rem;
}

.sidebar ul { list-style: none; }

.nav-btn {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 0.6rem 0.8rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-dark);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.nav-btn:hover {
    background-color: var(--color-light);
    color: var(--color-primary);
}

.nav-btn.active {
    background-color: var(--color-primary);
    color: var(--color-white);
    font-weight: bold;
}

.btn-cas-pratique.active {
    background-color: #D97706 !important;
}

.content-area {
    flex: 1;
    padding: 2.5rem 4rem;
    overflow-y: auto;
    background-color: var(--color-white);
}

.page-section {
    display: none;
    max-width: 950px;
    margin: 0 auto;
    animation: fadeIn 0.3s ease-in-out;
}

.page-section.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-section h2 {
    font-size: 2rem;
    margin-bottom: 1.2rem;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 0.5rem;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    font-family: var(--font-title);
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
    border-radius: 3px;
    margin-bottom: 0.8rem;
}

.badge-concept { background-color: #E2E2E2; color: #333; }
.badge-juris { background-color: var(--color-primary); color: var(--color-white); }
.badge-enjeux { background-color: #D97706; color: var(--color-white); }

/* Boxes */
.intro-text { font-size: 1.2rem; margin-bottom: 1.2rem; }

.concept-box {
    background-color: #F0FDF4;
    border-left: 4px solid var(--color-primary);
    padding: 1.2rem;
    margin: 1.2rem 0;
    border-radius: 0 4px 4px 0;
}

.quote-box {
    background-color: #F8F9FA;
    border-left: 4px solid var(--color-secondary);
    padding: 1.2rem;
    font-style: italic;
    margin: 1.2rem 0;
}

.quote-author {
    display: block;
    margin-top: 0.5rem;
    font-weight: bold;
    font-style: normal;
    color: var(--color-primary);
}

.juris-card {
    background-color: var(--color-juris);
    border: 1px solid #B2DFDB;
    border-radius: 6px;
    padding: 1.4rem;
    margin: 1.5rem 0;
}

.juris-header h3 {
    color: var(--color-secondary);
    margin-bottom: 0.6rem;
    font-size: 1.3rem;
}

.enjeux-box {
    background-color: var(--color-enjeux);
    border-radius: 4px;
    padding: 1rem 1.2rem;
    margin-top: 1rem;
}

.enjeux-box ul { margin-left: 1.2rem; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin: 1.2rem 0; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; margin: 1.2rem 0; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin: 1.2rem 0; }
.key-points-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin: 1.2rem 0; }

.card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    padding: 1.2rem;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

/* Image Styling */
.image-container {
    margin: 1.5rem 0;
    text-align: center;
    background-color: #FAFAFA;
    padding: 0.8rem;
    border: 1px dashed #CCC;
    border-radius: 4px;
}

.image-container img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

.caption {
    display: block;
    font-size: 0.85rem;
    color: #6C757D;
    margin-top: 0.4rem;
    font-style: italic;
}

body.mode-images-off .image-container { display: none !important; }

/* Cas Pratique */
.cas-item {
    background-color: #FAFAFA;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.cas-item h3 {
    margin-bottom: 0.6rem;
    font-size: 1.25rem;
}

.question-text {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 1rem;
    color: var(--color-dark);
}

.toggle-answer-btn {
    background-color: var(--color-secondary);
    color: var(--color-white);
    border: none;
    padding: 0.5rem 1rem;
    font-family: var(--font-title);
    font-size: 0.9rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

.toggle-answer-btn:hover {
    background-color: var(--color-primary);
}

.answer-box {
    display: none;
    margin-top: 1rem;
    padding: 1.2rem;
    background-color: var(--color-juris);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 4px 4px 0;
    animation: fadeIn 0.2s ease-in-out;
}

.answer-box.visible {
    display: block;
}

.answer-box ul {
    margin-left: 1.2rem;
    margin-top: 0.5rem;
}

/* Timeline */
.timeline-legend {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.legend-item {
    font-family: var(--font-title);
    font-size: 0.85rem;
    font-weight: bold;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    color: var(--color-white);
}

.timeline {
    position: relative;
    padding-left: 30px;
    border-left: 3px solid var(--color-border);
    margin: 1rem 0;
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
}

.timeline-marker {
    position: absolute;
    left: -39px;
    top: 5px;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    border: 3px solid var(--color-white);
    box-shadow: 0 0 0 2px var(--color-border);
}

.tag-cassation { background-color: var(--color-primary) !important; color: white !important; }
.tag-europe { background-color: #D97706 !important; color: white !important; }
.tag-international { background-color: #6B7280 !important; color: white !important; }

.timeline-content {
    background-color: #FAFAFA;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 1.2rem;
    transition: transform 0.2s;
}

.timeline-content:hover {
    transform: translateX(5px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.timeline-year {
    font-family: var(--font-title);
    font-weight: bold;
    color: var(--color-secondary);
    font-size: 1.1rem;
}

.timeline-badge {
    font-family: var(--font-title);
    font-size: 0.75rem;
    font-weight: bold;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    text-transform: uppercase;
}

.timeline-content h3 {
    font-size: 1.2rem;
    margin-bottom: 0.4rem;
}

/* ==========================================================================
   STYLE BURGER & RESPONSIVE DESIGN (MOBILE & TABLETTE)
   ========================================================================== */

.burger-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 101;
}

.burger-btn span {
    width: 100%;
    height: 3px;
    background-color: var(--color-white);
    border-radius: 2px;
    transition: all 0.3s ease-in-out;
}

.burger-btn.active span:nth-child(1) {
    transform: translateY(8.5px) rotate(45deg);
}
.burger-btn.active span:nth-child(2) {
    opacity: 0;
}
.burger-btn.active span:nth-child(3) {
    transform: translateY(-8.5px) rotate(-45deg);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 90;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

@media screen and (max-width: 900px) {
    .burger-btn {
        display: flex;
    }

    .top-bar {
        padding: 0.8rem 1rem;
    }

    .header-titles h1 {
        font-size: 1.1rem;
    }

    .header-titles .subtitle {
        display: none;
    }

    .controls {
        gap: 0.4rem;
    }

    .btn-control {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
        width: 280px;
        padding-top: 4rem;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .content-area {
        padding: 1.5rem 1rem;
    }

    .grid-2, .grid-3, .grid-4, .key-points-grid {
        grid-template-columns: 1fr !important;
    }

    .timeline {
        padding-left: 20px;
    }

    .timeline-marker {
        left: -29px;
    }
}

/* ==========================================================================
   STYLES D'IMPRESSION / EXPORT PDF (@media print)
   ========================================================================== */
@media print {
    /* Masquer uniquement les éléments d'interface */
    .sidebar, 
    .controls, 
    .image-container, 
    .burger-btn,
    .sidebar-overlay {
        display: none !important;
    }

    body {
        background-color: white !important;
        color: black !important;
        height: auto !important;
        overflow: visible !important;
        font-size: 10pt;
    }

    .top-bar {
        background: none !important;
        color: black !important;
        border-bottom: 2px solid #00A896;
        padding: 0 0 8px 0 !important;
        margin-bottom: 15px !important;
    }

    .top-bar h1 {
        color: #00A896 !important;
        font-size: 16pt;
    }

    .main-container {
        height: auto !important;
        display: block !important;
    }

    .content-area {
        padding: 0 !important;
        overflow: visible !important;
    }

    /* Afficher l'intro et toutes les sections de cours à la suite */
    .page-section {
        display: block !important;
        opacity: 1 !important;
        transform: none !important;
        max-width: 100% !important;
        margin-bottom: 25px !important;
        page-break-inside: auto;
    }

    .page-section h2 {
        color: #00A896 !important;
        font-size: 13pt;
        border-bottom: 1px solid #00A896 !important;
        margin-top: 15px;
        page-break-after: avoid;
    }

    /* Adapter les grilles pour l'impression */
    .grid-2, .grid-3, .grid-4, .key-points-grid {
        display: block !important;
    }

    .card {
        page-break-inside: avoid;
        margin-bottom: 8px !important;
        padding: 8px 12px !important;
        border: 1px solid #DDD !important;
        box-shadow: none !important;
    }

    .timeline-item {
        page-break-inside: avoid;
    }

    .timeline-content {
        border: 1px solid #CCC !important;
        background: #FFF !important;
    }
}