/* css/main.css - Variables et styles de base */

/* === VARIABLES CSS === */
:root {
    /* Couleurs principales */
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* Backgrounds */
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-light: #334155;
    --bg-header: rgba(15, 23, 42, 0.9);
    
    /* Textes */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-accent: linear-gradient(135deg, var(--accent-color), #f97316);
    --gradient-hero: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    --gradient-card: linear-gradient(135deg, var(--bg-card) 0%, rgba(30, 41, 59, 0.8) 100%);
    
    /* Ombres */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.5);
    --shadow-glow-hover: 0 0 40px rgba(99, 102, 241, 0.7);
    
    /* Border radius */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --border-radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Tailles de police */
    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-base: 1rem;
    --font-lg: 1.125rem;
    --font-xl: 1.25rem;
    --font-2xl: 1.5rem;
    --font-3xl: 1.875rem;
    --font-4xl: 2.25rem;
    --font-5xl: 3rem;
    --font-6xl: 3.75rem;
}

/* === RESET ET BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    line-height: 1.5;
}

body {
    background: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    font-feature-settings: 'kern' 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === SCROLLBAR PERSONNALISÉE === */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Scrollbar pour Firefox */
html {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--bg-dark);
}

/* === LAYOUT DE BASE === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: 5rem 0;
    position: relative;
}

/* === HEADER === */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--bg-header);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
    z-index: 1000;
    transition: all var(--transition-normal);
}

header.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: var(--shadow-lg);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: var(--font-2xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    text-decoration: none;
    transition: transform var(--transition-normal);
}

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

/* === NAVIGATION === */
.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-base);
    transition: all var(--transition-normal);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-links a:hover {
    color: var(--primary-color);
    transform: translateY(-1px);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
    border-radius: 1px;
}

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

/* Bouton Soutenir dans la navigation */
.nav-donate-btn {
    background: linear-gradient(135deg, #ff6b6b, #feca57) !important;
    color: white !important;
    padding: var(--spacing-xs) var(--spacing-md) !important;
    border-radius: var(--border-radius-xl) !important;
    font-weight: 600 !important;
    display: flex !important;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: var(--shadow-md);
    border: none !important;
}

.nav-donate-btn::after {
    display: none !important;
}

.nav-donate-btn:hover {
    background: linear-gradient(135deg, #ff5252, #ffb300) !important;
    transform: translateY(-2px) !important;
    box-shadow: var(--shadow-lg), 0 0 30px rgba(255, 107, 107, 0.4) !important;
    color: white !important;
}

.nav-donate-btn i {
    font-size: 0.9rem;
    animation: heartBeat 2s ease-in-out infinite;
}

@keyframes heartBeat {
    0%, 50%, 100% { 
        transform: scale(1); 
    }
    25% { 
        transform: scale(1.1); 
    }
    75% { 
        transform: scale(0.9); 
    }
}

/* Menu mobile */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-normal);
}

.mobile-menu-toggle:hover span {
    background: var(--primary-color);
}

/* === TYPOGRAPHIE === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--font-5xl);
}

h2 {
    font-size: var(--font-4xl);
}

h3 {
    font-size: var(--font-2xl);
}

p {
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* === BOUTONS === */
.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    text-decoration: none;
    border-radius: var(--border-radius-xl);
    font-weight: 600;
    font-size: var(--font-base);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    min-width: 150px;
    gap: var(--spacing-xs);
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button.primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-lg);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.cta-button.secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
}

.cta-button.secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Bouton donation spécial */
.cta-button.donate-cta {
    background: linear-gradient(135deg, #ff6b6b, #feca57);
    color: white;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.cta-button.donate-cta:hover {
    background: linear-gradient(135deg, #ff5252, #ffb300);
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(255, 107, 107, 0.4);
}

.cta-button.donate-cta i {
    animation: heartBeat 2s ease-in-out infinite;
    color: white;
}

/* Hero buttons layout */
.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

/* === SECTION TITLES === */
.section-title {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-2xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* === FOOTER === */
footer {
    background: var(--bg-card);
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-top: 1px solid rgba(99, 102, 241, 0.1);
}

footer p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.footer-subtitle {
    font-size: var(--font-sm);
    color: var(--text-muted);
    font-style: italic;
}

/* === RESPONSIVE === */
/* Tablette */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .section {
        padding: 4rem 0;
    }
    
    nav {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .nav-links {
        gap: 1.5rem;
    }
    
    .nav-donate-btn {
        padding: var(--spacing-xs) var(--spacing-sm) !important;
        font-size: var(--font-sm) !important;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --font-5xl: 2.5rem;
        --font-4xl: 2rem;
        --font-3xl: 1.5rem;
        --font-2xl: 1.25rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .section-title {
        margin-bottom: var(--spacing-xl);
    }
    
    .cta-button {
        min-width: 120px;
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: var(--font-sm);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    .hero-buttons .cta-button {
        width: 100%;
        max-width: 280px;
    }
}

/* Très petit mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .section {
        padding: 2rem 0;
    }
    
    nav {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .logo {
        font-size: var(--font-xl);
    }
}

/* === UTILITAIRES === */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.hidden {
    display: none;
}

.visible {
    display: block;
}

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

/* === FOCUS ET ACCESSIBILITÉ === */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.cta-button:focus,
.nav-links a:focus,
.contact-link:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Réduction des animations pour ceux qui préfèrent */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}