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

/* ── Design system (cohérent avec guides.html & mentions_legales.html) ── */
:root {
    --primary:       #6366f1;
    --primary-light: #eef2ff;
    --success:       #10b981;
    --success-light: #ecfdf5;
    --danger:        #ef4444;
    --danger-light:  #fef2f2;
    --warning:       #f59e0b;
    --warning-light: #fffbeb;
    --bg:       #f8fafc;
    --surface:  #ffffff;
    --border:   #e2e8f0;
    --text:     #0f172a;
    --text-2:   #475569;
    --text-3:   #94a3b8;
    --r-sm: 8px;
    --r:    12px;
    --r-lg: 16px;
    --sh:   0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
    --nav-h: 60px;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

/* ── NAV ── */
nav {
    position: fixed;
    inset: 0 0 auto;
    height: var(--nav-h);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    display: flex;
    align-items: center;
    width: 100%;
    padding: 0;
}

.nav-content {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text);
    transition: opacity .15s;
}

.logo:hover { opacity: .75; transform: none; }
.logo-move { color: var(--primary); }

.btn-back {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: var(--r-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-2);
    text-decoration: none;
    border: 1px solid var(--border);
    background: transparent;
    transition: background .15s, color .15s;
}

.btn-back:hover {
    background: var(--bg);
    color: var(--text);
    transform: none;
}

/* ── HERO ── */
.hero {
    padding: calc(var(--nav-h) + 44px) 24px 36px;
    background: linear-gradient(160deg, var(--primary-light) 0%, var(--bg) 60%);
    border-bottom: 1px solid var(--border);
    text-align: center;
    animation: none;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-2);
    margin-bottom: 14px;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

.hero-badge i { color: var(--primary); font-size: 10px; }

.hero h1 {
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    font-weight: 700;
    letter-spacing: -.025em;
    color: var(--text);
    margin-bottom: 10px;
    text-shadow: none;
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
    background-clip: unset;
}

.hero p {
    font-size: .95rem;
    color: var(--text-2);
    max-width: 500px;
    margin: 0 auto;
    opacity: 1;
    line-height: 1.7;
}

/* ── CONTAINER ── */
.container {
    max-width: 860px;
    margin: 0 auto;
    padding: 28px 24px 64px;
}

/* ── INFO CARDS ── */
.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 16px;
    animation: none;
}

.info-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 16px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
    transition: box-shadow .15s;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

.info-card:hover {
    box-shadow: var(--sh);
    background: var(--surface);
}

.info-icon {
    width: 36px;
    height: 36px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: var(--r-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.info-label {
    font-size: 11px;
    color: var(--text-3);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: .06em;
}

.info-value {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text);
    margin-top: 2px;
}

/* ── CONTENT SECTIONS ── */
.content-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 28px 32px;
    margin-bottom: 16px;
    box-shadow: var(--sh);
    animation: none;
    position: relative;
    overflow: hidden;
}

.content-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--primary);
    border-radius: var(--r-lg) var(--r-lg) 0 0;
}

.section-header { margin-bottom: 24px; }

.section-header h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
    letter-spacing: -.015em;
}

.section-header p {
    color: var(--text-2);
    font-size: 13.5px;
}

/* ── FORM ── */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.form-row .form-group { margin-bottom: 0; }

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
}

.required { color: var(--primary); font-size: .9em; }
.optional  { color: var(--text-3); font-weight: 400; font-size: .85em; }

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    font-size: 14px;
    font-family: inherit;
    color: var(--text);
    background: var(--bg);
    transition: border-color .15s, box-shadow .15s, background .15s;
    -webkit-appearance: none;
    appearance: none;
    outline: none;
}

.form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236b7280' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 12px;
    padding-right: 36px;
    cursor: pointer;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    background: var(--surface);
    box-shadow: 0 0 0 3px rgba(99,102,241,.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-3); }

.form-group input.valid   { border-color: var(--success); background: var(--success-light); }
.form-group input.invalid,
.form-group select.invalid,
.form-group textarea.invalid { border-color: var(--danger); background: var(--danger-light); }

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

.submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px 20px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--r-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity .15s, box-shadow .15s;
    letter-spacing: .01em;
    font-family: inherit;
}

.submit-btn:hover {
    opacity: .9;
    box-shadow: 0 4px 12px rgba(99,102,241,.3);
    transform: none;
}

.submit-btn:active { opacity: 1; box-shadow: none; }

.submit-btn:disabled {
    opacity: .5;
    cursor: not-allowed;
    box-shadow: none;
}

/* ── STATUS MESSAGE ── */
.status-message {
    display: none;
    padding: 10px 14px;
    border-radius: var(--r-sm);
    margin-bottom: 20px;
    font-size: 13.5px;
    font-weight: 500;
    border-left: 3px solid;
}

.status-message.success {
    background: var(--success-light);
    border-color: var(--success);
    color: #065f46;
}

.status-message.error {
    background: var(--danger-light);
    border-color: var(--danger);
    color: #991b1b;
}

/* ── SUJET AUTRE ── */
.sujet-autre-wrap {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    margin-bottom: 0;
    transition: max-height .3s ease, opacity .3s ease, margin-bottom .3s ease;
}

.sujet-autre-wrap.visible {
    max-height: 100px;
    opacity: 1;
    margin-bottom: 16px;
}

/* ── FAQ ACCORDION ── */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--r);
    overflow: hidden;
    transition: border-color .15s;
}

.faq-item:hover { border-color: var(--primary); }

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 16px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    transition: background .12s, color .12s;
    gap: 12px;
}

.faq-question:hover { background: var(--bg); }

.faq-question.open {
    color: var(--primary);
    background: var(--primary-light);
}

.faq-question i {
    color: var(--text-3);
    flex-shrink: 0;
    font-size: 11px;
    transition: transform .2s, color .15s;
}

.faq-question.open i {
    transform: rotate(180deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
}

.faq-answer.open { max-height: 260px; }

.faq-answer p {
    padding: 12px 16px 14px;
    color: var(--text-2);
    font-size: 13.5px;
    line-height: 1.7;
    border-top: 1px solid var(--border);
    margin: 0;
}

/* ── SPINNER ── */
.spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin .7s linear infinite;
    flex-shrink: 0;
}

/* ── FOOTER ── */
footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 20px 24px;
}

.footer-content {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-3);
    font-size: 13px;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-links { display: flex; gap: 20px; }

.footer-links a {
    color: var(--text-2);
    text-decoration: none;
    transition: color .15s;
}

.footer-links a:hover { color: var(--primary); }

/* ── ANIMATIONS ── */
@keyframes spin { to { transform: rotate(360deg); } }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
    .hero { padding: calc(var(--nav-h) + 24px) 16px 24px; }
    .hero h1 { font-size: 1.5rem; }
    .container { padding: 16px 16px 48px; }
    .info-grid { grid-template-columns: 1fr; gap: 8px; }
    .form-row { grid-template-columns: 1fr; gap: 0; }
    .form-row .form-group { margin-bottom: 16px; }
    .content-section { padding: 20px 16px; }
    .footer-content { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    .btn-back span { display: none; }
    .hero h1 { font-size: 1.4rem; }
}