/* ================================================================
   BRANDS PAGE REDESIGN - DSI France Premium
   Couleur principale conservée: #12a8be
   Design: Modern, Clean, Premium
   ================================================================ */

/* ========== VARIABLES CSS ========== */
:root {
    /* Couleurs principales (conservées) */
    --dsi-primary: #12a8be;
    --dsi-primary-dark: #0e8a9f;
    --dsi-primary-light: #e8f8fb;
    --dsi-primary-ultra-light: #f5fcfd;
    
    /* Couleurs neutres */
    --dsi-dark: #1a1a1a;
    --dsi-gray-900: #2d2d2d;
    --dsi-gray-700: #4a4a4a;
    --dsi-gray-500: #6b6b6b;
    --dsi-gray-300: #d4d4d4;
    --dsi-gray-100: #f5f5f5;
    --dsi-white: #ffffff;
    
    /* Ombres */
    --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-primary: 0 8px 20px rgba(18, 168, 190, 0.2);
    
    /* Rayons de bordure */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== RESET & BASE ========== */
.dsi-brands-modern {
    background: var(--dsi-gray-100);
    min-height: 100vh;
    padding: 0;
    margin: 0;
}

.dsi-page-title {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}


/* ========== HERO SECTION ========== */
.dsi-hero-section {
    background: linear-gradient(135deg, var(--dsi-primary) 0%, var(--dsi-primary-dark) 100%);
    padding: 80px 24px 100px;
    position: relative;
    overflow: hidden;
    margin-bottom: 0;
}

.dsi-hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    filter: blur(80px);
    animation: heroFloat 20s ease-in-out infinite;
}

.dsi-hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 50%;
    filter: blur(60px);
    animation: heroFloat 15s ease-in-out infinite 2s;
}

@keyframes heroFloat {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(-20px, -20px); }
    50% { transform: translate(10px, -30px); }
    75% { transform: translate(-10px, -10px); }
}

.dsi-hero-container {
    max-width: 1280px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 2;
}

.dsi-hero-badge {
    display: inline-block;
    padding: 8px 24px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--dsi-white);
    margin-bottom: 24px;
    animation: fadeInDown 0.6s ease-out;
}

.dsi-hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    color: var(--dsi-white);
    margin: 0 0 24px 0;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.dsi-hero-highlight {
    background: linear-gradient(to right, #ffffff 0%, rgba(255, 255, 255, 0.85) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
}

.dsi-hero-subtitle {
    font-size: 18px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

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

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


/* ========== BARRE DE RECHERCHE ========== */
.dsi-search-section {
    background: var(--dsi-white);
    padding: 40px 24px;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--dsi-gray-300);
    position: relative;
    z-index: 99;
}

.dsi-search-container {
    max-width: 800px;
    margin: 0 auto;
}

.dsi-search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--dsi-gray-100);
    border-radius: var(--radius-lg);
    padding: 16px 20px;
    transition: var(--transition);
    border: 2px solid transparent;
}

.dsi-search-wrapper:focus-within {
    background: var(--dsi-white);
    border-color: var(--dsi-primary);
    box-shadow: var(--shadow-primary);
}

.dsi-search-icon {
    color: var(--dsi-gray-500);
    flex-shrink: 0;
    transition: var(--transition);
}

.dsi-search-wrapper:focus-within .dsi-search-icon {
    color: var(--dsi-primary);
}

.dsi-search-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 16px;
    font-weight: 500;
    color: var(--dsi-gray-900);
    padding: 0 16px;
    outline: none;
}

.dsi-search-input::placeholder {
    color: var(--dsi-gray-500);
    font-weight: 400;
}

.dsi-search-clear {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--dsi-gray-300);
    color: var(--dsi-gray-700);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.dsi-search-clear:hover {
    background: var(--dsi-primary);
    color: var(--dsi-white);
}

.dsi-search-results-count {
    text-align: center;
    margin-top: 16px;
    padding: 8px 16px;
    background: var(--dsi-primary-light);
    border-radius: var(--radius-sm);
    animation: fadeInUp 0.3s ease-out;
}

.dsi-search-results-count span {
    font-size: 14px;
    font-weight: 600;
    color: var(--dsi-primary-dark);
}

/* Effet quand aucun résultat */
.dsi-no-results {
    text-align: center;
    padding: 80px 24px;
}

.dsi-no-results-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    opacity: 0.3;
}

.dsi-no-results-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--dsi-gray-900);
    margin: 0 0 12px 0;
}

.dsi-no-results-text {
    font-size: 16px;
    color: var(--dsi-gray-500);
    margin: 0;
}

/* Classes pour masquer/afficher les sections */
.dsi-letter-section.hidden {
    display: none;
}

.dsi-brand-card.hidden {
    display: none;
}


/* ========== NAVIGATION ALPHABET ========== */
.dsi-alphabet-nav {
    background: var(--dsi-white);
    box-shadow: var(--shadow-sm);
    padding: 32px 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--dsi-gray-300);
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.98);
}

.dsi-nav-container {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.dsi-alphabet-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    flex: 1;
}

.dsi-letter-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid transparent;
    background: var(--dsi-gray-100);
    color: var(--dsi-gray-500);
    cursor: pointer;
}

.dsi-letter-btn.active {
    background: var(--dsi-primary-ultra-light);
    color: var(--dsi-primary);
    border-color: var(--dsi-primary);
}

.dsi-letter-btn.active:hover {
    background: var(--dsi-primary);
    color: var(--dsi-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

.dsi-letter-btn.disabled {
    background: transparent;
    color: var(--dsi-gray-300);
    cursor: not-allowed;
    opacity: 0.5;
}

.dsi-btn-all {
    padding: 12px 32px;
    background: var(--dsi-primary);
    color: var(--dsi-white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    box-shadow: var(--shadow-sm);
}

.dsi-btn-all:hover {
    background: var(--dsi-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}


/* ========== CONTENU DES MARQUES ========== */
.dsi-brands-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 60px 24px 80px;
}

.dsi-letter-section {
    margin-bottom: 80px;
}

.dsi-section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 3px solid var(--dsi-primary);
}

.dsi-letter-title {
    font-size: 48px;
    font-weight: 800;
    color: var(--dsi-primary);
    margin: 0;
    letter-spacing: -1px;
}

.dsi-brand-count {
    font-size: 14px;
    font-weight: 600;
    color: var(--dsi-gray-500);
    background: var(--dsi-gray-100);
    padding: 6px 16px;
    border-radius: 50px;
}


/* ========== GRID DE MARQUES ========== */
.dsi-brands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
}

.dsi-brand-card {
    background: var(--dsi-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-xs);
    position: relative;
}

.dsi-brand-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--dsi-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.dsi-brand-card:hover::before {
    transform: scaleX(1);
}

.dsi-brand-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.dsi-brand-link {
    display: block;
    padding: 40px 24px;
    text-decoration: none;
    color: inherit;
    position: relative;
    min-height: 220px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

/* Logo */
.dsi-logo-wrapper {
    width: 100%;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.dsi-brand-logo {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: var(--transition);
    filter: grayscale(0);
}

.dsi-brand-card:hover .dsi-brand-logo {
    transform: scale(1.05);
    filter: grayscale(0.3);
}

.dsi-logo-placeholder {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--dsi-primary) 0%, var(--dsi-primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.dsi-brand-card:hover .dsi-logo-placeholder {
    transform: scale(1.05);
}

.dsi-logo-initial {
    font-size: 36px;
    font-weight: 800;
    color: var(--dsi-white);
}

/* Nom de la marque */
.dsi-brand-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--dsi-gray-900);
    text-align: center;
    margin: 0;
    letter-spacing: 0.3px;
    transition: var(--transition);
}

.dsi-brand-card:hover .dsi-brand-name {
    color: var(--dsi-primary);
}

/* Icône hover */
.dsi-brand-hover-icon {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    background: var(--dsi-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dsi-white);
    opacity: 0;
    transform: scale(0.8);
    transition: var(--transition);
}

.dsi-brand-card:hover .dsi-brand-hover-icon {
    opacity: 1;
    transform: scale(1);
}


/* ========== BOUTON RETOUR EN HAUT ========== */
.dsi-back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 56px;
    height: 56px;
    background: var(--dsi-primary);
    border: none;
    border-radius: 50%;
    color: var(--dsi-white);
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dsi-back-to-top:hover {
    background: var(--dsi-primary-dark);
    transform: translateY(-4px);
    box-shadow: var(--shadow-primary);
}


/* ========== RESPONSIVE ========== */

/* Tablettes */
@media (max-width: 1024px) {
    .dsi-brands-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 20px;
    }
    
    .dsi-hero-title {
        font-size: 48px;
    }
    
    .dsi-letter-title {
        font-size: 40px;
    }
}

/* Mobile paysage */
@media (max-width: 768px) {
    .dsi-hero-section {
        padding: 60px 20px 80px;
    }
    
    .dsi-hero-title {
        font-size: 40px;
    }
    
    .dsi-hero-subtitle {
        font-size: 16px;
    }
    
    .dsi-search-section {
        padding: 32px 20px;
    }
    
    .dsi-search-wrapper {
        padding: 14px 16px;
    }
    
    .dsi-search-input {
        font-size: 15px;
    }
    
    .dsi-alphabet-nav {
        padding: 24px 20px;
    }
    
    .dsi-nav-container {
        flex-direction: column;
        gap: 16px;
    }
    
    .dsi-alphabet-grid {
        justify-content: center;
        gap: 6px;
    }
    
    .dsi-letter-btn {
        width: 40px;
        height: 40px;
        font-size: 14px;
    }
    
    .dsi-btn-all {
        width: 100%;
        padding: 14px 32px;
    }
    
    .dsi-brands-content {
        padding: 40px 20px 60px;
    }
    
    .dsi-letter-section {
        margin-bottom: 60px;
    }
    
    .dsi-letter-title {
        font-size: 36px;
    }
    
    .dsi-brands-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 16px;
    }
    
    .dsi-brand-link {
        padding: 32px 20px;
        min-height: 180px;
    }
    
    .dsi-logo-wrapper {
        height: 80px;
    }
    
    .dsi-logo-placeholder {
        width: 70px;
        height: 70px;
    }
    
    .dsi-logo-initial {
        font-size: 28px;
    }
    
    .dsi-brand-name {
        font-size: 14px;
    }
}

/* Mobile portrait */
@media (max-width: 576px) {
    .dsi-hero-section {
        padding: 48px 16px 64px;
    }
    
    .dsi-hero-title {
        font-size: 32px;
    }
    
    .dsi-hero-subtitle {
        font-size: 15px;
    }
    
    .dsi-search-section {
        padding: 24px 16px;
    }
    
    .dsi-search-wrapper {
        padding: 12px 14px;
    }
    
    .dsi-search-input {
        font-size: 14px;
        padding: 0 12px;
    }
    
    .dsi-search-icon {
        width: 18px;
        height: 18px;
    }
    
    .dsi-search-clear {
        width: 28px;
        height: 28px;
    }
    
    .dsi-no-results {
        padding: 60px 16px;
    }
    
    .dsi-no-results-icon {
        width: 60px;
        height: 60px;
    }
    
    .dsi-no-results-title {
        font-size: 20px;
    }
    
    .dsi-no-results-text {
        font-size: 14px;
    }
    
    .dsi-brands-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .dsi-brand-link {
        padding: 24px 16px;
        min-height: 160px;
        gap: 16px;
    }
    
    .dsi-logo-wrapper {
        height: 70px;
    }
    
    .dsi-brand-name {
        font-size: 13px;
    }
    
    .dsi-letter-title {
        font-size: 32px;
    }
    
    .dsi-back-to-top {
        width: 48px;
        height: 48px;
        bottom: 24px;
        right: 24px;
    }
}

/* Très petit mobile */
@media (max-width: 380px) {
    .dsi-hero-title {
        font-size: 28px;
    }
    
    .dsi-brand-link {
        min-height: 140px;
    }
    
    .dsi-logo-wrapper {
        height: 60px;
    }
    
    .dsi-logo-placeholder {
        width: 60px;
        height: 60px;
    }
    
    .dsi-logo-initial {
        font-size: 24px;
    }
}