/* Page d'aide - Styles */
:root {
    --blue: #003DA5;
    --blue-dark: #002B75;
    --blue-pale: #E8F0FE;
    --success: #0D7A3E;
    --success-light: #E6F4EC;
    --error: #C41E3A;
    --error-light: #FCE8EC;
    --gray-50: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --font-display: 'Playfair Display', serif;
    --font-body: 'Source Sans 3', sans-serif;
}

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

body {
    font-family: var(--font-body);
    background: linear-gradient(135deg, var(--blue-pale) 0%, white 100%);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: white;
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    box-shadow: 0 4px 12px rgba(0,61,165,0.08);
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-600);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}
.back-btn:hover { color: var(--blue); }

.header-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--blue);
}

.fleur-icon { width: 36px; height: 36px; }

/* Sections */
section {
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 4px 12px rgba(0,61,165,0.08);
    padding: 2rem;
    margin-bottom: 1.5rem;
}

section h2 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--blue);
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--blue-pale);
}

/* Intro */
.intro h1 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--gray-800);
    margin-bottom: 1rem;
}

.intro p {
    font-size: 1.1rem;
    color: var(--gray-600);
}

/* Cards étapes */
.cards-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

@media (max-width: 900px) {
    .cards-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
    .cards-row { grid-template-columns: 1fr; }
}

.card {
    background: var(--gray-50);
    border-radius: 0.5rem;
    padding: 1.25rem;
    text-align: center;
    position: relative;
}

.card-number {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 28px;
    height: 28px;
    background: var(--blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.card-icon {
    font-size: 2rem;
    color: var(--blue);
    margin: 1rem 0 0.75rem;
}

.card h3 {
    font-size: 1rem;
    color: var(--gray-800);
    margin-bottom: 0.5rem;
}

.card p {
    font-size: 0.85rem;
    color: var(--gray-600);
}

/* Formats */
.formats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 700px) {
    .formats-grid { grid-template-columns: 1fr; }
}

.format-box {
    background: var(--gray-50);
    border-radius: 0.5rem;
    padding: 1rem;
}

.format-box h3 {
    font-size: 0.9rem;
    color: var(--gray-700);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.format-box h3 i { color: var(--blue); }

.format-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
}

.format-tags span {
    padding: 3px 10px;
    background: var(--blue-pale);
    color: var(--blue);
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 600;
}

.format-tags.export span {
    background: var(--success-light);
    color: var(--success);
}

/* Colonnes */
.columns-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 1000px) {
    .columns-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
    .columns-grid { grid-template-columns: 1fr; }
}

.column-box {
    padding: 1rem;
    border-radius: 0.5rem;
    border: 2px solid;
}

.column-box.required {
    background: var(--blue-pale);
    border-color: var(--blue);
}

.column-box.optional {
    background: var(--gray-50);
    border-color: var(--gray-200);
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 100px;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.badge.required { background: var(--blue); color: white; }
.badge.optional { background: var(--gray-400); color: white; }

.column-box h3 {
    font-size: 1rem;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
}

.column-box p {
    font-size: 0.85rem;
    color: var(--gray-600);
    margin-bottom: 0.25rem;
}

.column-box .hint {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-style: italic;
}

.info-box {
    display: flex;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--success-light);
    border-radius: 0.5rem;
    border-left: 4px solid var(--success);
}

.info-box i {
    color: var(--success);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.info-box div {
    font-size: 0.85rem;
    color: var(--gray-700);
}

/* Validation */
.validation-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 700px) {
    .validation-grid { grid-template-columns: 1fr; }
}

.validation-box {
    padding: 1rem;
    border-radius: 0.5rem;
}

.validation-box.valid { background: var(--success-light); }
.validation-box.invalid { background: var(--error-light); }

.validation-box h3 {
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.validation-box.valid h3 { color: var(--success); }
.validation-box.invalid h3 { color: var(--error); }

.validation-box ul {
    list-style: none;
    font-size: 0.85rem;
    color: var(--gray-700);
}

.validation-box li {
    padding: 0.25rem 0 0.25rem 1rem;
    position: relative;
}

.validation-box li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--gray-400);
}

/* FAQ */
.faq details {
    background: var(--gray-50);
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.faq summary {
    padding: 0.75rem 1rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--gray-700);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq summary::after {
    content: '+';
    font-size: 1.25rem;
    color: var(--blue);
}

.faq details[open] summary::after { content: '−'; }
.faq summary:hover { background: var(--blue-pale); }

.faq details p {
    padding: 0 1rem 1rem;
    font-size: 0.9rem;
    color: var(--gray-600);
}

/* Footer */
.footer {
    text-align: center;
    padding: 1.5rem 0;
    color: var(--gray-500);
    font-size: 0.8rem;
}

.footer strong { color: var(--blue); }

.footer .version {
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: var(--gray-400);
}

/* Bouton retour en haut */
.btn-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--blue);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    box-shadow: 0 4px 12px rgba(0,61,165,0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.btn-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.btn-top:hover {
    background: var(--blue-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0,61,165,0.4);
}

@media (max-width: 768px) {
    .btn-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
        font-size: 1rem;
    }
}