/* ============================================
   JIY 2026 – Design System v2
   Palette : bleu marine #1a2d5a · orange #f47920
   Typographie : Poppins (titres) + Inter (body)
   ============================================ */

:root {
    --bleu: #1a2d5a;
    --bleu-clair: #2a4080;
    --orange: #f47920;
    --orange-hover: #d9651a;
    --blanc: #ffffff;
    --gris-bg: #f5f6fa;
    --gris-clair: #e8eaf0;
    --gris-texte: #5a6275;
    --noir: #1a1a2e;
    --shadow-card: 0 4px 24px rgba(26,45,90,.10);
    --shadow-btn: 0 4px 16px rgba(244,121,32,.35);
    --radius: 12px;
    --radius-sm: 8px;
    --font-title: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-ar: 'Amiri', serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    color: var(--noir);
    background: var(--blanc);
    line-height: 1.6;
    font-size: 16px;
}
body.lang-ar { font-family: var(--font-ar); }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ---- SPONSOR HEADER ---- */
.sponsor-header {
    background: var(--blanc);
    border-bottom: 1px solid var(--gris-clair);
    padding: 14px 0;
}
.sponsor-header-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}
.sponsor-logo-top {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-decoration: none;
}
.sponsor-logo-top img,
.sponsor-logo-top svg {
    height: 56px;
    width: auto;
}
.sponsor-logo-top span {
    font-size: 11px;
    color: var(--gris-texte);
    text-align: center;
    font-family: var(--font-body);
}
.sponsor-divider {
    width: 1px;
    height: 50px;
    background: var(--gris-clair);
}

/* ---- NAVBAR ---- */
.navbar {
    background: rgba(26,45,90,.97);
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 12px rgba(26,45,90,.2);
}
.nav-inner {
    display: flex;
    align-items: center;
    gap: 20px;
}
.logo-nav {
    text-decoration: none;
    display: flex;
    align-items: baseline;
    gap: 3px;
}
.logo-nav .logo-jiy {
    font-family: var(--font-title);
    font-size: 20px;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 1px;
}
.logo-nav .logo-year {
    font-size: 13px;
    color: rgba(255,255,255,.5);
    font-weight: 300;
}
.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
    margin-left: auto;
}
.nav-links a {
    text-decoration: none;
    color: rgba(255,255,255,.8);
    font-size: 14px;
    padding: 6px 14px;
    border-radius: 20px;
    transition: all .2s;
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,.1); }
.nav-links a.active { color: #fff; background: rgba(255,255,255,.15); }
.btn-nav-orange {
    background: var(--orange) !important;
    color: #fff !important;
    font-weight: 600 !important;
    box-shadow: var(--shadow-btn);
}
.btn-nav-orange:hover { background: var(--orange-hover) !important; }

.lang-switcher {
    display: flex;
    gap: 4px;
    font-size: 13px;
    margin-left: 8px;
}
.lang-switcher a {
    text-decoration: none;
    color: rgba(255,255,255,.6);
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid transparent;
    transition: all .2s;
}
.lang-switcher a.active,
.lang-switcher a:hover {
    color: #fff;
    border-color: rgba(255,255,255,.3);
}
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 22px;
    cursor: pointer;
    margin-left: auto;
}

/* ---- HERO ---- */
.hero {
    position: relative;
    min-height: 82vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background: url('assets/carthage.jpg') center/cover no-repeat;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(26,45,90,.88) 45%, rgba(26,45,90,.25) 100%);
}
.hero-content {
    position: relative;
    z-index: 2;
    padding: 60px 0;
    max-width: 560px;
}
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--orange);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    padding: 5px 14px;
    border-radius: 20px;
    margin-bottom: 20px;
}
.hero-titre {
    font-family: var(--font-title);
    font-size: clamp(36px, 5.5vw, 62px);
    font-weight: 700;
    color: #fff;
    line-height: 1.12;
    margin-bottom: 20px;
}
.hero-titre span { color: var(--orange); }

.hero-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 24px;
}
.hero-meta-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255,255,255,.9);
    font-size: 16px;
    font-weight: 500;
}
.hero-meta-item svg { color: var(--orange); flex-shrink: 0; }

.hero-badge-free {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255,255,255,.8);
    font-size: 14px;
    margin-bottom: 28px;
}
.hero-badge-free::before {
    content: '✓';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: rgba(255,255,255,.2);
    border-radius: 50%;
    font-size: 11px;
    color: #fff;
}

.hero-places {
    margin-bottom: 28px;
}
.places-bar {
    background: rgba(255,255,255,.2);
    border-radius: 20px;
    height: 6px;
    overflow: hidden;
    width: 300px;
    max-width: 100%;
}
.places-fill {
    background: var(--orange);
    height: 100%;
    border-radius: 20px;
}
.places-texte {
    color: rgba(255,255,255,.75);
    font-size: 13px;
    margin-top: 6px;
}

.btn-orange {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--orange);
    color: #fff;
    text-decoration: none;
    padding: 15px 32px;
    border-radius: 30px;
    font-family: var(--font-title);
    font-weight: 600;
    font-size: 16px;
    transition: all .2s;
    box-shadow: var(--shadow-btn);
    cursor: pointer;
    border: none;
}
.btn-orange:hover {
    background: var(--orange-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(244,121,32,.45);
}
.btn-orange svg { transition: transform .2s; }
.btn-orange:hover svg { transform: translateX(4px); }

.hero-secure {
    display: flex;
    align-items: center;
    gap: 6px;
    color: rgba(255,255,255,.55);
    font-size: 12px;
    margin-top: 12px;
}

/* ---- POURQUOI S'INSCRIRE ---- */
.section-why {
    background: #fff;
    padding: 0;
    margin-top: -1px;
}
.why-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: 28px 36px;
    margin: 0 auto;
    max-width: 960px;
    transform: translateY(-40px);
    border: 1px solid var(--gris-clair);
}
.why-title {
    font-family: var(--font-title);
    font-size: 17px;
    font-weight: 600;
    color: var(--bleu);
    margin-bottom: 20px;
}
.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.why-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.why-icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    color: var(--orange);
}
.why-item-text strong {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--bleu);
    margin-bottom: 3px;
}
.why-item-text span {
    font-size: 12px;
    color: var(--gris-texte);
    line-height: 1.4;
}

/* ---- SECTION GÉNÉRIQUE ---- */
.section {
    padding: 72px 0;
}
.section-bg-gris { background: var(--gris-bg); }

.section-titre {
    font-family: var(--font-title);
    font-size: clamp(24px, 3.5vw, 36px);
    font-weight: 700;
    color: var(--bleu);
    margin-bottom: 12px;
}
.section-titre.centré { text-align: center; }
.section-sous-titre {
    color: var(--gris-texte);
    font-size: 15px;
    margin-bottom: 40px;
}
.section-sous-titre.centré { text-align: center; }

/* ---- PROGRAMME ---- */
.timeline {
    max-width: 540px;
    margin: 0 auto;
}
.timeline-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 18px 0;
    border-bottom: 1px solid var(--gris-clair);
}
.timeline-item:last-child { border-bottom: none; }
.timeline-heure {
    font-family: var(--font-title);
    font-size: 18px;
    font-weight: 600;
    color: var(--orange);
    min-width: 72px;
    text-align: right;
}
.timeline-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gris-clair);
    border: 2px solid var(--bleu-clair);
    flex-shrink: 0;
}
.timeline-dot-main {
    width: 18px;
    height: 18px;
    background: var(--orange);
    border-color: var(--orange);
}
.timeline-texte {
    font-size: 16px;
    color: var(--noir);
    font-weight: 500;
}

/* ---- INFOS CARD ---- */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}
.infos-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--gris-clair);
}
.infos-card h3 {
    font-family: var(--font-title);
    font-size: 18px;
    font-weight: 600;
    color: var(--bleu);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--orange);
    display: inline-block;
}
.infos-list { list-style: none; }
.infos-list li {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--gris-bg);
    font-size: 14px;
}
.infos-list li:last-child { border-bottom: none; }
.info-label { color: var(--gris-texte); font-weight: 400; min-width: 80px; }

/* ---- CTA BANNER ---- */
.section-cta { background: var(--bleu); text-align: center; padding: 60px 0; }
.section-cta h2 {
    font-family: var(--font-title);
    font-size: clamp(24px, 3.5vw, 36px);
    color: #fff;
    margin-bottom: 10px;
}
.section-cta p { color: rgba(255,255,255,.75); margin-bottom: 28px; font-size: 16px; }

/* ---- SPONSOR FOOTER BAND ---- */
.sponsor-band {
    background: var(--bleu);
    border-top: 1px solid rgba(255,255,255,.08);
    padding: 28px 0;
}
.sponsor-band-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}
.sponsor-band-label {
    color: rgba(255,255,255,.5);
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    width: 100%;
    text-align: center;
    margin-bottom: 16px;
}
.sponsor-logo-bot {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding: 0 20px;
    border-right: 1px solid rgba(255,255,255,.1);
}
.sponsor-logo-bot:last-child { border-right: none; }
.sponsor-logo-bot img,
.sponsor-logo-bot svg { height: 32px; width: auto; opacity: .85; }

/* ---- FOOTER ---- */
.footer {
    background: #0f1c3a;
    padding: 24px 0;
}
.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    text-align: center;
}
.footer p { color: rgba(255,255,255,.35); font-size: 13px; }
.footer a { color: rgba(255,255,255,.5); text-decoration: none; }
.footer a:hover { color: var(--orange); }

/* ---- FORMULAIRE ---- */
.page-inscription {
    background: var(--gris-bg);
    min-height: 100vh;
}
.inscription-inner {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 40px;
    padding: 48px 0 64px;
    align-items: start;
}
.form-panel {
    background: #fff;
    border-radius: var(--radius);
    padding: 36px;
    box-shadow: var(--shadow-card);
}
.form-titre {
    font-family: var(--font-title);
    font-size: 28px;
    font-weight: 700;
    color: var(--bleu);
    margin-bottom: 6px;
}
.form-sous-titre {
    color: var(--gris-texte);
    font-size: 14px;
    margin-bottom: 28px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 16px;
}
.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--bleu);
    margin-bottom: 6px;
}
.form-group label .required { color: var(--orange); margin-left: 2px; }
.input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}
.input-icon {
    position: absolute;
    left: 12px;
    color: var(--gris-texte);
    font-size: 15px;
    pointer-events: none;
}
[dir="rtl"] .input-icon { left: auto; right: 12px; }
.input-wrap input,
.input-wrap select {
    width: 100%;
    padding: 10px 14px 10px 36px;
    border: 1.5px solid var(--gris-clair);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    color: var(--noir);
    background: #fff;
    transition: border-color .2s, box-shadow .2s;
    appearance: none;
}
[dir="rtl"] .input-wrap input,
[dir="rtl"] .input-wrap select { padding: 10px 36px 10px 14px; }
.input-wrap input:focus,
.input-wrap select:focus {
    outline: none;
    border-color: var(--orange);
    box-shadow: 0 0 0 3px rgba(244,121,32,.12);
}
.input-wrap input::placeholder { color: #b0b5c5; }

/* select arrow */
.input-wrap.select-wrap::after {
    content: '▾';
    position: absolute;
    right: 12px;
    color: var(--gris-texte);
    pointer-events: none;
    font-size: 12px;
}

.form-section-title {
    font-family: var(--font-title);
    font-size: 14px;
    font-weight: 700;
    color: var(--bleu);
    margin: 20px 0 12px;
    padding-top: 16px;
    border-top: 1px solid var(--gris-clair);
}

.form-checks { display: flex; flex-direction: column; gap: 12px; margin-bottom: 20px; }
.check-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
    padding: 12px;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--gris-clair);
    transition: border-color .2s;
}
.check-label:has(input:checked) { border-color: var(--orange); background: rgba(244,121,32,.04); }
.check-label input[type="checkbox"] {
    width: 17px;
    height: 17px;
    margin-top: 2px;
    accent-color: var(--orange);
    flex-shrink: 0;
}
.check-label span { font-size: 13px; color: var(--gris-texte); line-height: 1.5; }

.houdou-block {
    background: rgba(244,121,32,.06);
    border: 1.5px solid rgba(244,121,32,.25);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 20px;
}
.houdou-block-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--bleu);
    margin-bottom: 6px;
}
.houdou-block-title .badge-opt {
    font-size: 11px;
    font-weight: 400;
    color: var(--gris-texte);
    border: 1px solid var(--gris-clair);
    padding: 1px 7px;
    border-radius: 10px;
}
.houdou-block p { font-size: 13px; color: var(--gris-texte); margin-bottom: 10px; }
.houdou-benefits {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px 16px;
    margin-top: 10px;
}
.houdou-benefits span {
    font-size: 12px;
    color: var(--gris-texte);
    display: flex;
    align-items: center;
    gap: 5px;
}
.houdou-benefits span::before { content: '✓'; color: var(--orange); font-weight: 700; }

.btn-submit-full {
    width: 100%;
    justify-content: center;
    font-size: 16px;
    padding: 16px;
    border-radius: var(--radius-sm);
}
.form-secure {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    color: var(--gris-texte);
    font-size: 12px;
    margin-top: 10px;
}

/* Sidebar inscription */
.form-sidebar {}
.sidebar-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow-card);
    margin-bottom: 20px;
    text-align: center;
}
.sidebar-card .yoga-illustration { width: 120px; margin: 0 auto 16px; display: block; }
.sidebar-card h3 {
    font-family: var(--font-title);
    font-size: 20px;
    font-weight: 700;
    color: var(--bleu);
    margin-bottom: 8px;
    line-height: 1.3;
}
.sidebar-card p { font-size: 13px; color: var(--gris-texte); margin-bottom: 16px; }
.sidebar-benefits { list-style: none; text-align: left; }
.sidebar-benefits li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--gris-bg);
    font-size: 13px;
    color: var(--gris-texte);
}
.sidebar-benefits li:last-child { border-bottom: none; }
.sidebar-benefits li svg { color: var(--orange); flex-shrink: 0; }

/* ---- CONFIRMATION ---- */
.page-confirmation {
    background: var(--gris-bg);
    min-height: 100vh;
    padding-top: 0;
}
.confirm-wrapper {
    max-width: 600px;
    margin: 0 auto;
    padding: 48px 24px 64px;
}
.confirm-header {
    text-align: center;
    margin-bottom: 32px;
}
.confirm-icon-wrap {
    width: 72px;
    height: 72px;
    background: #d4edda;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 32px;
}
.confirm-header h1 {
    font-family: var(--font-title);
    font-size: 28px;
    font-weight: 700;
    color: var(--bleu);
    margin-bottom: 8px;
}
.confirm-header p { color: var(--gris-texte); font-size: 15px; }

.billet {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,.12);
    margin-bottom: 24px;
}
.billet-header {
    background: var(--bleu);
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.billet-header-left .logo-jiy { color: var(--orange); font-family: var(--font-title); font-size: 20px; font-weight: 700; }
.billet-header-left .logo-year { color: rgba(255,255,255,.5); font-size: 13px; }
.billet-header p { color: rgba(255,255,255,.7); font-size: 12px; margin-top: 3px; }
.billet-event-badge {
    background: var(--orange);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.billet-body {
    display: flex;
}
.billet-infos {
    flex: 1;
    padding: 22px 24px;
}
.billet-ligne {
    display: flex;
    flex-direction: column;
    padding: 9px 0;
    border-bottom: 1px solid var(--gris-bg);
    font-size: 14px;
}
.billet-ligne:last-child { border-bottom: none; }
.billet-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--gris-texte);
    margin-bottom: 2px;
}
.billet-val { font-weight: 600; color: var(--bleu); }
.billet-code { font-family: monospace; font-size: 13px; color: var(--orange); letter-spacing: 2px; }
.billet-qr {
    padding: 22px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-left: 1px dashed var(--gris-clair);
    min-width: 170px;
    text-align: center;
}
.billet-qr img { border-radius: 8px; border: 3px solid var(--gris-bg); }
.billet-qr p { font-size: 11px; color: var(--gris-texte); margin-top: 8px; line-height: 1.4; }
.billet-footer {
    background: var(--gris-bg);
    padding: 12px 24px;
    font-size: 12px;
    color: var(--gris-texte);
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-retour {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 2px solid var(--bleu);
    color: var(--bleu);
    text-decoration: none;
    padding: 10px 24px;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 500;
    transition: all .2s;
}
.btn-retour:hover { background: var(--bleu); color: #fff; }

/* ---- VERIFY ---- */
.verify-page {
    min-height: 100vh;
    background: var(--gris-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.verify-card {
    max-width: 420px;
    width: 100%;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,.15);
}
.verify-card-head { padding: 36px 28px; text-align: center; }
.verify-card-head.valid { background: #1a7c4a; }
.verify-card-head.invalid { background: #c0392b; }
.verify-card-head .v-icon { font-size: 56px; margin-bottom: 12px; }
.verify-card-head h1 { color: #fff; font-family: var(--font-title); font-size: 24px; }
.verify-card-body { background: #fff; padding: 24px 28px; }
.verify-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--gris-bg);
    font-size: 14px;
}
.verify-row:last-child { border-bottom: none; }
.verify-label { color: var(--gris-texte); }
.verify-val { font-weight: 600; color: var(--bleu); }
.badge-v { padding: 3px 10px; border-radius: 12px; font-size: 12px; font-weight: 600; }
.badge-ok { background: #d4edda; color: #1a7c4a; }
.badge-no { background: #fde8e8; color: #c0392b; }

/* ---- ALERTS ---- */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.alert-error { background: #fde8e8; color: #9b1c1c; border: 1px solid #fca5a5; }
.alert-warning { background: #fff7ed; color: #92400e; border: 1px solid #fcd34d; }
.alert-success { background: #d4edda; color: #1a7c4a; border: 1px solid #a3d9b1; }

.places-counter { margin-bottom: 22px; }
.places-counter p { font-size: 13px; color: var(--gris-texte); margin-top: 5px; }

.complet-msg {
    display: inline-block;
    background: rgba(244,121,32,.15);
    border: 1px solid var(--orange);
    color: var(--orange);
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
}

/* ---- RTL ---- */
[dir="rtl"] .nav-links { margin-left: 0; margin-right: auto; }
[dir="rtl"] .timeline-heure { text-align: left; }
[dir="rtl"] .input-wrap.select-wrap::after { right: auto; left: 12px; }

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
    .inscription-inner { grid-template-columns: 1fr; }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .grid-2 { grid-template-columns: 1fr; }
    .form-sidebar { display: none; }
}
@media (max-width: 640px) {
    .nav-links { display: none; position: fixed; top: 60px; left:0; right:0;
        background: var(--bleu); flex-direction: column; padding: 20px;
        box-shadow: 0 8px 24px rgba(0,0,0,.2); gap: 8px; }
    .nav-links.open { display: flex; }
    .menu-toggle { display: block; }
    .sponsor-header-inner { gap: 20px; }
    .sponsor-divider { display: none; }
    .why-grid { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .billet-body { flex-direction: column; }
    .billet-qr { border-left: none; border-top: 1px dashed var(--gris-clair); }
    .why-card { transform: translateY(-20px); padding: 20px; }
}