/* =========================================
   CHARTE GRAPHIQUE - CONFÉRENCE IA 2026
   ========================================= */
   :root {
    --blue-deep: #002F6C;
    --cyan-electric: #00C2FF;
    --cyan-darker: #009acb;
    --red-alert: #ff4757;
    --green-success: #2ed573;
    --orange-warning: #ffa502;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F5; 
    --bg-accent: #002F6C;
    --text-primary: #222222;
    --text-secondary: #666666;
    --text-inverted: #FFFFFF;
    --border-color: #dddddd;
    --card-shadow: 0 4px 10px rgba(0,0,0,0.05);
    --navbar-bg: rgba(255, 255, 255, 0.95);
    --font-title: 'Merriweather', serif;
    --font-body: 'Montserrat', sans-serif;
    --header-height: 70px;
}

body.dark-mode {
    --bg-primary: #121212;
    --bg-secondary: #1E1E24;
    --bg-accent: #001a3d;
    --text-primary: #E0E0E0;
    --text-secondary: #A0A0A0;
    --text-inverted: #E0E0E0;
    --border-color: #333333;
    --card-shadow: 0 4px 10px rgba(0,0,0,0.3);
    --navbar-bg: rgba(18, 18, 18, 0.95);
}

/* =========================================
   RESET & BASE
   ========================================= */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

h1, h2, h3 { font-family: var(--font-title); font-weight: 700; color: var(--text-primary); }
a { text-decoration: none; transition: 0.3s; }
ul { list-style: none; }

/* UTILITAIRES */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section-padding { padding: 80px 0; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.bg-alt { background-color: var(--bg-secondary); }
.bg-accent { background-color: var(--bg-accent); }
.text-white { color: var(--text-inverted) !important; }
.icon-cyan { color: var(--cyan-electric); }
.mt-20 { margin-top: 20px; }
.p-20 { padding: 20px; }
.full-width { grid-column: span 2; width: 100%; }

/* =========================================
   NAVIGATION
   ========================================= */
.navbar {
    background-color: var(--navbar-bg);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    position: fixed; width: 100%; top: 0; z-index: 1000;
    height: var(--header-height);
    transition: background-color 0.3s ease;
}
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 100%; }
.logo { font-family: var(--font-title); font-weight: 900; font-size: 1.3rem; color: var(--blue-deep); }
body.dark-mode .logo { color: var(--cyan-electric); }

.nav-controls { display: flex; align-items: center; gap: 15px; }
.theme-btn { background: none; border: none; cursor: pointer; font-size: 1.2rem; color: var(--text-primary); transition: transform 0.3s; }
.theme-btn:hover { transform: rotate(15deg); color: var(--cyan-electric); }

.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a { color: var(--text-primary); font-weight: 600; font-size: 0.95rem; position: relative; }
.nav-links a:not(.btn-cta)::after {
    content: ''; position: absolute; width: 0; height: 2px; bottom: -5px; left: 0;
    background-color: var(--cyan-electric); transition: width 0.3s;
}
.nav-links a:not(.btn-cta):hover::after { width: 100%; }
.nav-links a:hover { color: var(--cyan-electric); }

.hamburger { display: none; cursor: pointer; background: none; border: none; }
.bar { display: block; width: 25px; height: 3px; margin: 5px auto; transition: all 0.3s ease-in-out; background-color: var(--text-primary); }

/* =========================================
   BOUTONS
   ========================================= */
.btn {
    display: inline-block; padding: 12px 28px; border-radius: 50px;
    font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; font-size: 0.9rem;
    border: 2px solid transparent; transition: all 0.3s ease; box-shadow: 0 4px 6px rgba(0,0,0,0.1); cursor: pointer;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background-color: var(--cyan-electric); color: var(--white); }
.btn-primary:hover { background-color: var(--cyan-darker); }
.btn-secondary { border-color: var(--cyan-electric); color: var(--cyan-electric); background-color: transparent; }
.btn-secondary:hover { background-color: var(--cyan-electric); color: var(--white); }

.btn-cyan { background-color: var(--cyan-electric); color: var(--white); width: 100%; border: none; cursor: pointer; padding: 15px; border-radius: 12px; font-size: 1rem; font-weight: 700; }
.btn-cyan:hover { background-color: var(--cyan-darker); }

.btn-cta { background-color: var(--cyan-electric); color: var(--white) !important; padding: 10px 20px; border-radius: 50px; }
.btn-cta:hover { background-color: var(--cyan-darker); }

.btn-sm { padding: 5px 10px; font-size: 0.8rem; border-radius: 4px; border: none; cursor: pointer; color: white; margin-right: 5px; }
.btn-success { background-color: var(--green-success); }
.btn-danger { background-color: var(--red-alert); }

/* =========================================
   HERO SECTION
   ========================================= */
.hero-section {
    min-height: 100vh; padding-top: var(--header-height); padding-bottom: 60px;
    background-color: var(--bg-accent);
    background-image: linear-gradient(135deg, var(--bg-accent) 40%, rgba(0,0,0,0.8) 100%);
    position: relative; display: flex; align-items: center; justify-content: center;
    color: var(--text-inverted); text-align: center; overflow: hidden;
}
.hero-section::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background-image: radial-gradient(var(--cyan-electric) 1px, transparent 1px);
    background-size: 30px 30px; opacity: 0.15;
}
body.dark-mode .hero-section::before { opacity: 0.1; }

.hero-content { position: relative; z-index: 2; max-width: 800px; }
.tagline { color: var(--cyan-electric); font-weight: 700; letter-spacing: 1px; margin-bottom: 15px; text-transform: uppercase; }
.hero-content h1 { font-size: 3.5rem; margin-bottom: 25px; line-height: 1.1; color: var(--text-inverted); }
.date-lieu { font-size: 1.2rem; margin-bottom: 30px; opacity: 0.9; }
.date-lieu i { color: var(--cyan-electric); margin-right: 8px; }
.buttons { display: flex; gap: 15px; justify-content: center; flex-wrap: wrap; }
.mobile-break { display: none; }

/* =========================================
   PROGRAMME (TIMELINE)
   ========================================= */
.section-title { font-size: 2.2rem; margin-bottom: 60px; text-align: center; position: relative; color: var(--text-primary); }
.section-title::after { content: ''; display: block; width: 60px; height: 4px; border-radius: 2px; background-color: var(--cyan-electric); margin: 20px auto 0; }

.timeline { max-width: 800px; margin: 0 auto; position: relative; padding-left: 20px; }
.timeline::before { content: ''; position: absolute; left: 29px; top: 0; bottom: 0; width: 2px; background-color: #E5E5E5; }
body.dark-mode .timeline::before { background-color: #333; }

.timeline-item { position: relative; margin-bottom: 50px; padding-left: 60px; }
.timeline-item::before {
    content: ''; position: absolute; left: 0; top: 0; width: 16px; height: 16px;
    border-radius: 50%; background-color: var(--blue-deep);
    border: 4px solid var(--bg-primary); z-index: 2; box-shadow: 0 0 0 1px rgba(0,0,0,0.05);
}
body.dark-mode .timeline-item::before { border-color: var(--bg-primary); box-shadow: 0 0 0 1px var(--cyan-electric); }

.time { font-weight: 700; color: var(--cyan-electric); margin-bottom: 5px; font-size: 1rem; }
.content h3 { font-family: var(--font-title); color: var(--blue-deep); font-size: 1.4rem; margin-bottom: 8px; font-weight: 700; }
body.dark-mode .content h3 { color: var(--text-primary); }
.content p { color: var(--text-secondary); font-size: 1rem; margin: 0; }

/* =========================================
   COMPTEURS DE PLACES (STYLE JAUGE)
   ========================================= */
.counters-container { 
    display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-bottom: 50px; 
}
.counter-card { 
    background: rgba(255,255,255,0.1); 
    padding: 25px; 
    border-radius: 16px; 
    border: 1px solid rgba(255,255,255,0.2); 
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}
.counter-header { 
    display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; 
}
.counter-label { 
    font-weight: 700; color: #fff; font-family: var(--font-title); 
    font-size: 1.1rem;
    display: flex; align-items: center; gap: 8px;
}
.counter-label i { color: var(--cyan-electric); }

.counter-value { 
    font-weight: 800; color: #fff; background: var(--cyan-darker); 
    padding: 4px 12px; border-radius: 20px; font-size: 0.9rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.progress-bar-bg { 
    height: 24px; /* Plus épais */
    background: rgba(0,0,0,0.4); 
    border-radius: 12px; 
    overflow: hidden; 
    border: 1px solid rgba(255,255,255,0.1);
    position: relative;
}
/* Ajout d'un motif rayé pour l'effet "pro" */
.progress-fill { 
    height: 100%; 
    background: linear-gradient(90deg, var(--cyan-electric), #2ed573);
    width: 0%; 
    border-radius: 12px;
    box-shadow: 0 0 15px rgba(0, 194, 255, 0.6);
    transition: width 1s cubic-bezier(0.25, 1, 0.5, 1);
    position: relative;
}
/* Effet de brillance */
.progress-fill::after {
    content: ''; position: absolute; top: 0; left: 0; bottom: 0; right: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.2) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.2) 50%, rgba(255,255,255,0.2) 75%, transparent 75%, transparent);
    background-size: 20px 20px;
    opacity: 0.3;
}

/* =========================================
   FORMULAIRE
   ========================================= */
.form-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 700px; margin: 0 auto;
    background: rgba(255,255,255,0.05); padding: 40px; border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.1); backdrop-filter: blur(5px);
}
.form-group { display: flex; flex-direction: column; }
label { margin-bottom: 8px; font-size: 0.9rem; font-weight: 600; color: var(--cyan-electric); }

input, select, textarea {
    padding: 12px; border: 2px solid rgba(255,255,255,0.1); border-radius: 10px;
    font-family: var(--font-body); font-size: 1rem;
    background-color: rgba(0,0,0,0.2); color: var(--text-inverted); transition: 0.3s; outline: none;
    width: 100%;
}
input::placeholder, textarea::placeholder { color: rgba(255,255,255,0.5); }
input:focus, select:focus, textarea:focus { border-color: var(--cyan-electric); background-color: rgba(0,0,0,0.3); }

/* Boutons Radio (Choix Conf) */
.choice-group {
    background: rgba(255,255,255,0.05); padding: 20px; border-radius: 15px; margin-bottom: 10px;
    border: 1px solid rgba(255,255,255,0.1);
}
.radio-options { display: flex; gap: 30px; margin-top: 15px; justify-content: space-around; }
.radio-label { 
    display: flex; align-items: center; gap: 10px; cursor: pointer; font-weight: 500; font-size: 1rem; color: white;
    padding: 10px; border-radius: 8px; transition: background 0.3s;
}
.radio-label:hover { background: rgba(255,255,255,0.1); }
.radio-label input { width: 22px; height: 22px; margin: 0; accent-color: var(--cyan-electric); flex-shrink: 0; cursor: pointer; }
.disabled-choice { opacity: 0.5; cursor: not-allowed; text-decoration: line-through; }

/* Checkbox RGPD */
.checkbox-wrapper { flex-direction: row; align-items: flex-start; gap: 12px; }
.checkbox-wrapper input { width: 20px; height: 20px; margin-top: 3px; accent-color: var(--cyan-electric); flex-shrink: 0; }
.checkbox-wrapper label { color: rgba(255,255,255,0.8); font-weight: 400; font-size: 0.9rem; cursor: pointer; }

/* Message de confirmation */
.message-box { 
    background-color: rgba(0, 194, 255, 0.1); color: var(--cyan-electric); 
    padding: 20px; border-radius: 12px; margin-top: 30px; 
    text-align: center; border: 1px solid var(--cyan-electric); font-weight: 600; 
}

/* =========================================
   ADMIN PANEL
   ========================================= */
.admin-controls { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.admin-table { 
    width: 100%; border-collapse: collapse; 
    background: var(--bg-primary); box-shadow: var(--card-shadow); 
    border-radius: 8px; overflow: hidden; margin-bottom: 20px;
}
.admin-table th, .admin-table td { 
    padding: 15px; text-align: left; 
    border-bottom: 1px solid var(--border-color); 
    color: var(--text-primary); vertical-align: middle; 
}
.admin-table th { background-color: var(--bg-secondary); font-weight: 700; color: var(--blue-deep); }
body.dark-mode .admin-table th { color: var(--cyan-electric); }

.status-badge { padding: 4px 8px; border-radius: 4px; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; display: inline-block; }
.status-pending { background-color: rgba(255, 165, 2, 0.2); color: var(--orange-warning); }
.status-accepted { background-color: rgba(46, 213, 115, 0.2); color: var(--green-success); }
.status-refused { background-color: rgba(255, 71, 87, 0.2); color: var(--red-alert); }

/* =========================================
   MODAL LOGIN
   ========================================= */
.modal { display: none; position: fixed; z-index: 2000; left: 0; top: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.8); }
.modal-content { 
    background-color: var(--bg-primary); margin: 15% auto; padding: 40px; 
    border-radius: 10px; width: 90%; max-width: 400px; 
    position: relative; box-shadow: 0 4px 20px rgba(0,0,0,0.5); 
}
.close-modal { color: #aaa; float: right; font-size: 28px; font-weight: bold; cursor: pointer; }
.close-modal:hover { color: var(--text-primary); }
.modal h3 { margin-bottom: 20px; text-align: center; color: var(--blue-deep); }
body.dark-mode .modal h3 { color: var(--cyan-electric); }
.modal input { color: var(--text-primary); background: var(--bg-secondary); border-color: var(--border-color); }

/* =========================================
   FOOTER
   ========================================= */
footer { background-color: var(--bg-accent); color: rgba(255,255,255,0.6); text-align: center; padding: 40px 0; font-size: 0.9rem; }

/* =========================================
   RESPONSIVE (Mobile)
   ========================================= */
@media (max-width: 992px) {
    .grid-2 { grid-template-columns: 1fr; gap: 30px; }
    .timeline::before { left: 30px; }
    .timeline-item { padding-left: 70px; }
}

@media (max-width: 768px) {
    .nav-container { padding: 0 20px; }
    .hamburger { display: block; z-index: 1001; }
    
    /* Animation Burger */
    .hamburger.active .bar:nth-child(2) { opacity: 0; }
    .hamburger.active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .hamburger.active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
    
    .nav-links {
        position: fixed; left: -100%; top: var(--header-height); gap: 0;
        flex-direction: column; background-color: var(--bg-primary); width: 100%;
        height: calc(100vh - var(--header-height)); transition: 0.3s ease-in-out; 
        align-items: flex-start; padding: 20px; overflow-y: auto;
    }
    .nav-links.active { left: 0; }
    .nav-links li { width: 100%; }
    .nav-links a { display: block; padding: 20px; border-bottom: 1px solid var(--border-color); width: 100%; }
    .nav-links a:not(.btn-cta)::after { display: none; }
    .btn-cta { margin-top: 10px; text-align: center; }

    .hero-content h1 { font-size: 2.5rem; }
    .mobile-break { display: block; }
    .date-lieu i { display: none; }
    .buttons { flex-direction: column; width: 100%; }
    .buttons .btn { width: 100%; }
    
    .form-grid, .counters-container { grid-template-columns: 1fr; padding: 25px; }
    .full-width { grid-column: span 1; }
    .radio-options { flex-direction: column; gap: 15px; }
    
    .admin-table th, .admin-table td { padding: 10px; font-size: 0.85rem; }
}