:root {
    --primary-blue: #0a2540;
    --accent-blue: #00d4ff;
    --slate-gray: #64748b;
    --crisp-white: #ffffff;
    --bg-light: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
    --shadow-soft: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --text-primary: #0a2540;   /* = --primary-blue en light */
    --text-heading: #0a2540;
}

[data-theme="dark"] {
    --primary-blue: #0f172a;
    --accent-blue: #38bdf8;
    --slate-gray: #94a3b8;
    --crisp-white: #f1f5f9;
    --bg-light: #020617;
    --card-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-soft: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    --text-primary: #f1f5f9;   /* Blanc cassé en dark mode */
    --text-heading: #e2e8f0;   /* Titres clairs en dark mode */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-light);
    color: var(--primary-blue);
    line-height: 1.6;
    transition: var(--transition);
    min-height: 100vh;
}

body[data-theme="dark"] {
    color: var(--crisp-white);
}

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

/* Header & Navigation - Sticky Floating Menu */
.site-header {
    position: sticky;
    top: 0;
    z-index: 9999 !important;
    padding-top: 0;
}

.nav-wrapper {
    background: #ffffff;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    
    margin-left: -25px;
    margin-right: -25px;
    width: calc(100% + 50px);
}

body[data-theme="dark"] .nav-wrapper {
    background: #0f172a;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary-blue);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

body[data-theme="dark"] .logo {
    color: var(--crisp-white);
}

.logo span {
    color: var(--accent-blue);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--slate-gray);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--accent-blue);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--slate-gray);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0.4rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--primary-blue);
}

body[data-theme="dark"] .theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--crisp-white);
}

/* Hero Section */
.hero {
    padding: 2rem 0 4rem;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero p {
    color: var(--slate-gray);
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* Search Bar Glassmorphism */
.search-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-bar-wrapper {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.search-bar-wrapper:focus-within {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.1);
}

.search-bar-wrapper i {
    margin-left: 1.5rem;
    color: var(--slate-gray);
    font-size: 1.2rem;
}

.search-bar-wrapper input {
    flex: 1;
    background: none;
    border: none;
    padding: 1rem;
    font-size: 1.1rem;
    color: inherit;
    outline: none;
}

.search-bar-wrapper input::placeholder {
    color: var(--slate-gray);
    font-style: italic;
    opacity: 0.6;
}

/* Global Form Placeholders */
input::placeholder,
textarea::placeholder {
    color: var(--slate-gray);
    font-style: italic;
    opacity: 0.6;
}

.search-button {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 100px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.search-button:hover {
    background: #1e293b;
    transform: translateY(-1px);
}

/* Search input group — contains input + clear button */
.search-input-group {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
}

.search-input-group input {
    width: 100%;
    padding-right: 3.5rem;
    /* Espace encore augmenté pour la sécurité */
}

/* Clear (×) search button */
.search-clear {
    position: absolute;
    right: 1.2rem;
    /* Position plus sécurisée */
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--slate-gray);
    font-size: 1.1rem;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.search-bar-wrapper.has-value .search-clear {
    opacity: 0.6;
    pointer-events: auto;
}

.search-clear:hover {
    opacity: 1 !important;
    color: var(--accent-blue);
    transform: translateY(-50%) scale(1.2);
}

body[data-theme="dark"] .search-clear:hover {
    color: var(--accent-blue);
}


/* Grid Sections */
.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.card {
    background: var(--crisp-white);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    cursor: pointer;
}

body[data-theme="dark"] .card {
    background: #1e293b;
    border-color: rgba(255, 255, 255, 0.05);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-soft);
    border-color: var(--accent-blue);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.acronym-tag {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--accent-blue);
}

.category-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--slate-gray);
    background: rgba(100, 116, 139, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
}

.card-content h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.card-content p {
    font-size: 0.9rem;
    color: var(--slate-gray);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Tag Cloud */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 4rem;
}

.tag {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1.25rem;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--slate-gray);
    text-decoration: none;
    transition: var(--transition);
}

.tag:hover {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

/* Footer */
footer {
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--slate-gray);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

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

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

/* Utilities */
.d-none {
    display: none !important;
}

@media (min-width: 768px) {
    .d-md-flex {
        display: flex !important;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .grid {
        grid-template-columns: 1fr;
    }

    .search-bar-wrapper {
        border-radius: 24px;
    }

    .search-button span {
        display: none;
    }

    .search-button {
        padding: 0.8rem 1.2rem;
    }

    .nav-wrapper {
        padding: 0.75rem 1.25rem;
    }

    .logo span {
        font-size: 1.1rem;
    }
}

/* Ad Banner Styles */
.ad-banner-container {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2000;
    transition: transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.ad-banner-container.collapsed {
    transform: translateX(-50%) translateY(250px);
}

.ad-tab {
    background: var(--primary-blue);
    color: white;
    padding: 4px 15px;
    border-radius: 8px 8px 0 0;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--glass-border);
    border-bottom: none;
    transition: var(--transition);
    z-index: 2001;
    flex-shrink: 0;
}

body[data-theme="dark"] .ad-tab {
    background: var(--accent-blue);
    color: var(--primary-blue);
}

.ad-content {
    width: 970px;
    height: 250px;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.ad-placeholder {
    color: var(--slate-gray);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0.5;
}

.ad-close-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    background: rgba(0, 0, 0, 0.1);
    border: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--primary-blue);
    font-size: 12px;
    transition: var(--transition);
}

body[data-theme="dark"] .ad-close-btn {
    background: rgba(255, 255, 255, 0.1);
    color: var(--crisp-white);
}

.ad-close-btn:hover {
    background: rgba(255, 0, 0, 0.2);
    color: white;
}

@media (max-width: 768px) {
    .ad-content {
        width: 100vw;
        height: calc(100vw * 250 / 970); /* Ratio exact 970x250 */
    }

    .ad-banner-container.collapsed {
        transform: translateX(-50%) translateY(calc(100vw * 250 / 970));
    }

    .ad-tab {
        font-size: 0.65rem;
        padding: 3px 10px;
        top: -24px;
    }
}

/* Contact Slider Styles */
.slider-container {
    background: rgba(100, 116, 139, 0.1);
    height: 60px;
    border-radius: 100px;
    position: relative;
    margin: 2rem 0;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    user-select: none;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.slider-text {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: var(--slate-gray);
    font-weight: 500;
    pointer-events: none;
    z-index: 1;
}

.slider-handle {
    width: 52px;
    height: 52px;
    background: var(--crisp-white);
    border-radius: 50%;
    position: absolute;
    left: 4px;
    top: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    z-index: 2;
    transition: transform 0.1s ease;
    color: var(--primary-blue);
}

.slider-handle:active {
    cursor: grabbing;
}

.slider-handle i {
    font-size: 1.2rem;
}

.slider-progress {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--accent-blue), #00a3ff);
    border-radius: 100px;
    opacity: 0.3;
}

.slider-container.success {
    background: rgba(34, 197, 94, 0.1);
    border-color: #22c55e;
}

.slider-container.success .slider-text {
    color: #166534;
}

.slider-container.success .slider-handle {
    background: #22c55e !important;
    color: white !important;
    cursor: default;
}

#submit-btn-container {
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
}

#submit-btn-container.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
/* ===== RESPONSIVE MOBILE ===== */
@media (max-width: 600px) {
    .grid-nom-prenom {
        grid-template-columns: 1fr !important;
    }
}

@media (max-width: 768px) {

    /* Page ph/acronyme.html */
    .ph-acronyme-card {
        padding: 1.25rem !important;
    }

    .ph-header {
        flex-direction: column !important;
        gap: 0.75rem;
    }

    .ph-title {
        font-size: 1.3rem !important;
        text-align: left !important;
        max-width: 100% !important;
    }

    .ph-grid {
        grid-template-columns: 1fr !important;
        gap: 1.5rem !important;
    }

    /* Cacher le sidebar pub sur mobile (la bannière bas d'écran suffit) */
    .ph-sidebar {
        display: none !important;
    }
}