/* ==========================================================================
   Amélioration du Design - 50e Anniversaire des Transmissions
   ========================================================================== */

/* --- Importation de la police --- */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

/* --- Variables de Design --- */
:root {
    --color-primary: #003366;
    --color-primary-dark: #002244;
    --color-accent: #FFCC00;
    --color-accent-dark: #e6b800;
    --color-text: #4a4a4a;
    --color-text-light: #7a7a7a;
    --color-background: #f9f9f9;
    --color-white: #ffffff;
    --font-family: 'Poppins', sans-serif;
    --header-height: 80px;
    --border-radius: 8px;
    --shadow-light: 0 4px 15px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 8px 25px rgba(0, 0, 0, 0.1);
    --transition-fast: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* --- Réinitialisation et Base --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* --- En-tête et Navigation --- */
.main-header {
    background-color: transparent;
    height: var(--header-height);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.main-header.header-dark {
    background-color: var(--color-primary);
    box-shadow: var(--shadow-light);
}

.main-header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-light);
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo-link {
    display: flex;
    align-items: center;
}

.logo-svg {
    height: 40px;
    width: auto;
    transition: transform var(--transition-fast);
}

.logo-link:hover .logo-svg {
    transform: scale(1.05);
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.main-nav a {
    color: var(--color-white);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    letter-spacing: 0.5px;
}

.main-header.scrolled .main-nav a {
    color: var(--color-primary);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-fast);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.main-header.scrolled .main-nav a {
    color: var(--color-primary-dark);
}

/* --- Pied de page --- */
.main-footer {
    background-color: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
    padding: 3rem 1rem;
    margin-top: 5rem;
}

/* --- Contenu Principal et Titres --- */
main {
    padding-top: var(--header-height);
}

.page-title {
    text-align: center;
    padding: 4rem 1rem 1rem;
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary-dark);
}

.page-subtitle {
    text-align: center;
    max-width: 700px;
    margin: -0.5rem auto 4rem;
    color: var(--color-text-light);
    font-size: 1.1rem;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 3rem;
}

/* --- Boutons --- */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.btn-accent {
    background-image: linear-gradient(45deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-primary-dark);
    box-shadow: var(--shadow-light);
}

/* --- Section Hero (Accueil) --- */
.hero {
    background: linear-gradient(rgba(0, 22, 44, 0.7), rgba(0, 51, 102, 0.7)), url('https://images.pexels.com/photos/531321/pexels-photo-531321.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1') no-repeat center center/cover;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--color-white);
    position: relative;
    top: -var(--header-height); /* Compense le padding-top du main */
    margin-bottom: -var(--header-height);
}

.hero-content {
    max-width: 900px;
    animation: fadeInDown 1s var(--transition-slow) both;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: 1px;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    margin-bottom: 2.5rem;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.9);
}

/* --- Section Compte à rebours --- */
#countdown-section {
    padding: 5rem 0;
    background-color: var(--color-background);
}

#countdown {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    text-align: center;
}

.time-box {
    background: var(--color-white);
    color: var(--color-primary-dark);
    padding: 2rem;
    border-radius: var(--border-radius);
    min-width: 140px;
    box-shadow: var(--shadow-medium);
    transition: transform var(--transition-fast);
}
.time-box:hover {
    transform: translateY(-5px);
}

.time-box span {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
}

.time-box small {
    font-size: 1rem;
    color: var(--color-accent-dark);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* --- Sections Générales --- */
.intro {
    padding: 5rem 2rem;
    max-width: 800px;
    text-align: center;
}

/* --- Animation Scroll-Reveal --- */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s var(--transition-slow), transform 1s var(--transition-slow);
}

.reveal-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Grille du Programme (programme.html) --- */
.programme-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

.programme-day-title {
    background: var(--color-primary-dark);
    color: var(--color-accent);
    padding: 1rem 1.5rem;
    font-size: 1.5rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    margin: 1.5rem 1.5rem;
}

.programme-item {
    display: flex;
    gap: 2rem;
    padding: 1.5rem;
    background: var(--color-white);
    border-radius: var(--border-radius);
    border-left: 5px solid var(--color-accent);
    box-shadow: var(--shadow-light);
    transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.programme-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.programme-time {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--color-primary-dark);
    flex-shrink: 0;
    width: 120px;
}

.programme-details h3 {
    margin-bottom: 0.5rem;
    color: var(--color-primary-dark);
    font-size: 1.2rem;
}
.programme-details p {
    color: var(--color-text-light);
}

@media (max-width: 768px) {
    .programme-item {
        flex-direction: column;
        gap: 1rem;
    }
    .programme-time {
        width: auto;
        border-bottom: 2px solid var(--color-accent);
        padding-bottom: 0.5rem;
    }
}

/* --- Filtres et Galerie (archives.html) --- */
.filter-buttons {
    text-align: center;
    margin-bottom: 3rem;
}

.filter-btn {
    background: none;
    border: 2px solid #ddd;
    color: var(--color-text-light);
    padding: 10px 24px;
    margin: 5px;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--color-accent-dark);
    color: var(--color-primary-dark);
}

.filter-btn.active {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
    border-color: var(--color-primary-dark);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all var(--transition-fast);
    animation: zoomIn 0.5s ease-in-out;
}

@keyframes zoomIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.gallery-item.hide {
    display: none;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-caption {
    padding: 1rem 1.2rem;
    background: var(--color-white);
    font-weight: 500;
}

/* --- Lieux (lieux.html) --- */
.locations-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.location-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
}

.location-card:nth-child(even) .location-map {
    order: 2;
}

.location-map img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    height: 400px;
    object-fit: cover;
}

.location-info h3 {
    color: var(--color-primary-dark);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.location-info p {
    margin-bottom: 1rem;
    color: var(--color-text-light);
}

.location-info strong {
    color: var(--color-text);
}

@media (max-width: 992px) {
    .location-card {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .location-card:nth-child(even) .location-map {
        order: 0;
    }
}

/* --- Formulaire (contacts.html) --- */
.contact-form {
    max-width: 800px;
    margin: 3rem auto 0;
    padding: 3rem;
    background: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.7rem;
    font-weight: 600;
    color: var(--color-primary-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.1);
}

.contact-form .btn {
    width: 100%;
    font-size: 1.1rem;
    padding: 15px;
}