/* ==========================================
   FLE+ Initiative - Styles principaux
   Version améliorée - Responsive optimisé
   ========================================== */

/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Palette de couleurs - Bleu profond + chaleur */
    --color-primary: #1e5a8e;
    --color-primary-dark: #164571;
    --color-primary-light: #2563eb;
    --color-text: #2d3748;
    --color-text-light: #4a5568;
    --color-background: #ffffff;
    --color-background-alt: #f7fafc;
    --color-border: #e2e8f0;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Breakpoints */
    --breakpoint-mobile: 600px;
    --breakpoint-tablet: 900px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-background);
    font-size: 18px;
}

/* Skip link pour accessibilité */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 100;
    border-radius: 0 0 4px 0;
    font-weight: 500;
}

.skip-link:focus {
    top: 0;
}

/* ==========================================
   Sélecteur de langue
   ========================================== */

.language-selector {
    background-color: var(--color-background-alt);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-xs) 0;
}

.language-selector-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.language-selector label {
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-weight: 500;
}

.language-selector a {
    color: var(--color-text);
    text-decoration: none;
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    transition: all 0.2s;
    font-weight: 500;
    font-size: 0.9rem;
}

.language-selector a:hover,
.language-selector a:focus {
    background-color: var(--color-primary-light);
    color: white;
}

.language-selector a.active {
    background-color: var(--color-primary);
    color: white;
}

/* ==========================================
   Header
   ========================================== */

header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: var(--spacing-lg) var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-content {
    max-width: 1100px;
    margin: 0 auto;
}

header h1 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
}

header .tagline {
    color: white;
    opacity: 0.95;
    font-size: clamp(0.95rem, 2.5vw, 1.1rem);
    font-weight: 400;
    line-height: 1.5;
    max-width: 90%;
}

/* ==========================================
   Navigation
   ========================================== */

nav {
    background-color: var(--color-background);
    border-bottom: 2px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

nav ul {
    list-style: none;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

nav a {
    display: block;
    padding: var(--spacing-sm) 0;
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

nav a:hover,
nav a:focus {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* ==========================================
   Contenu principal
   ========================================== */

main {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

section {
    margin-bottom: var(--spacing-xl);
}

h2 {
    font-size: clamp(1.4rem, 3.5vw, 1.75rem);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    font-weight: 600;
    line-height: 1.3;
}

h3 {
    font-size: clamp(1.15rem, 2.5vw, 1.3rem);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
    color: var(--color-text);
    font-weight: 600;
    line-height: 1.4;
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

ul, ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

li {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

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

/* Liens */
a {
    color: var(--color-primary-light);
    text-decoration: underline;
    transition: color 0.2s;
}

a:hover,
a:focus {
    color: var(--color-primary-dark);
}

/* ==========================================
   Composants
   ========================================== */

/* Badge WIP */
.wip-badge {
    display: inline-block;
    background-color: #dbeafe;
    color: var(--color-primary-dark);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

/* Box de mise en avant */
.highlight-box {
    background-color: var(--color-background-alt);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: 0 6px 6px 0;
}

.highlight-box p:last-child {
    margin-bottom: 0;
}

/* ==========================================
   Footer
   ========================================== */

footer {
    background-color: var(--color-background-alt);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) var(--spacing-md);
    color: var(--color-text-light);
    text-align: center;
    font-size: 0.9rem;
}

footer p {
    max-width: 100%;
    margin: 0 auto 0.5rem;
}

footer p:last-child {
    margin-bottom: 0;
}

footer a {
    color: var(--color-text-light);
    text-decoration: underline;
}

footer a:hover {
    color: var(--color-primary);
}

/* ==========================================
   Responsive - Mobile First
   ========================================== */

/* Petits écrans (< 600px) */
@media (max-width: 600px) {
    body {
        font-size: 16px;
    }
    
    .language-selector-content {
        justify-content: center;
        gap: var(--spacing-xs);
    }
    
    .language-selector label {
        width: 100%;
        text-align: center;
        margin-bottom: var(--spacing-xs);
    }
    
    header {
        padding: var(--spacing-md);
    }
    
    header .tagline {
        max-width: 100%;
    }
    
    nav ul {
        gap: var(--spacing-sm);
    }
    
    main {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    ul, ol {
        margin-left: var(--spacing-md);
    }
}

/* Écrans moyens (600px - 1100px) */
@media (min-width: 600px) and (max-width: 1100px) {
    main {
        padding: var(--spacing-xl) var(--spacing-md);
    }
}

/* Grands écrans (> 1100px) */
@media (min-width: 1100px) {
    body {
        font-size: 20px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    header .tagline {
        font-size: 1.1rem;
    }
    
    main {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
}

/* Impression */
@media print {
    .skip-link,
    .language-selector,
    nav,
    footer {
        display: none;
    }
    
    header {
        background: none;
        color: var(--color-text);
        border-bottom: 2px solid var(--color-text);
    }
    
    a {
        color: var(--color-text);
        text-decoration: none;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
    }
}