/**
 * CSS Principal - Institut Sarahoum
 * Design moderne, professionnel et responsive
 */

/* ============================================================================
   VARIABLES CSS (Mêmes couleurs que Next.js)
   ============================================================================ */

:root {
    /* Couleurs principales - VERT (Palette officielle 2IS) */
    --green-50: #E8F7ED;
    --green-100: #C5EFD6;
    --green-200: #9AE5BC;
    --green-300: #6DDAA1;
    --green-400: #4FC987;
    --green-500: #1E8449;
    --green-600: #1E8449;
    --green-700: #196F3D;
    --green-800: #145A32;
    --green-900: #0F4D26;
    --green-primary: #1E8449;
    --green-dark: #196F3D;

    /* Couleurs secondaires - BLEU (Palette officielle 2IS) */
    --blue-50: #EEF1FF;
    --blue-100: #D6DCFF;
    --blue-200: #ADC3FF;
    --blue-300: #8AA9FF;
    --blue-400: #5C7CFA;
    --blue-500: #1C2EB8;
    --blue-600: #0F1A6B;
    --blue-700: #0B1247;
    --blue-800: #080C30;
    --blue-primary: #1C2EB8;
    --blue-dark: #0F1A6B;

    /* Couleurs danger - ROUGE (Palette officielle 2IS) */
    --red-50: #FDE8E8;
    --red-100: #FCC7C7;
    --red-200: #F99A9A;
    --red-300: #F66D6D;
    --red-400: #F34D4D;
    --red-500: #E30613;
    --red-600: #B9050F;
    --red-700: #8A040B;
    --red-accent: #E30613;

    /* Couleurs warning - ORANGE (Palette officielle 2IS) */
    --orange-50: #FFF7ED;
    --orange-100: #FFEDD5;
    --orange-200: #FED7AA;
    --orange-300: #FDBA74;
    --orange-400: #FB923C;
    --orange-500: #F97316;
    --orange-600: #EA580C;
    --orange-700: #C2410C;

    /* Alias pour compatibilité (sera retiré à terme) */
    --primary: #1E8449;
    --primary-50: #E8F7ED;
    --primary-100: #C5EFD6;
    --primary-200: #9AE5BC;
    --primary-300: #6DDAA1;
    --primary-400: #4FC987;
    --primary-500: #1E8449;
    --primary-600: #1E8449;
    --primary-700: #196F3D;
    --primary-800: #145A32;
    --primary-900: #0F4D26;

    --secondary: #1C2EB8;
    --secondary-50: #EEF1FF;
    --secondary-100: #D6DCFF;
    --secondary-200: #ADC3FF;
    --secondary-300: #8AA9FF;
    --secondary-400: #5C7CFA;
    --secondary-500: #1C2EB8;
    --secondary-600: #0F1A6B;
    --secondary-700: #0B1247;

    --danger: #E30613;
    --danger-50: #FDE8E8;
    --danger-100: #FCC7C7;
    --danger-200: #F99A9A;
    --danger-300: #F66D6D;
    --danger-400: #F34D4D;
    --danger-500: #E30613;
    --danger-600: #B9050F;
    --danger-700: #8A040B;

    /* Grises (Palette officielle 2IS) */
    --gray-light: #F4F6F8;
    --gray-100: #E8EBED;
    --gray-medium: #D9DEE3;
    --gray-300: #B8BCC2;
    --gray-400: #9BA1A6;
    --gray-500: #6E747A;
    --text-on-dark: #E8EBED;
    --text-on-dark-hover: #FFFFFF;
    --gray-600: #52585D;
    --gray-dark: #4A4A4A;
    --gray-800: #333333;
    --black-soft: #1B1B1B;
    --white: #FFFFFF;

    /* Alias pour compatibilité */
    --gray-50: #F4F6F8;
    --gray-200: #D9DEE3;
    --gray-700: #4A4A4A;
    --gray-900: #1B1B1B;

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'Courier New', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --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);

    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

/* ============================================================================
   RESET & BASE
   ============================================================================ */

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

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

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--black-soft);
    background-color: var(--gray-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================================================
   TYPOGRAPHY
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--black-soft);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--gray-600);
}

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

a:hover {
    color: var(--green-700);
}

/* ============================================================================
   LAYOUT & CONTAINERS
   ============================================================================ */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-custom {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-3xl) 0;
}

.section-alt {
    background-color: var(--gray-100);
}

/* ============================================================================
   NAVBAR
   ============================================================================ */

.navbar {
    background: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar.sticky {
    box-shadow: var(--shadow-md);
}

.navbar-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--green-600);
}

.brand-logo {
    height: 40px;
    width: auto;
}

.navbar-collapse {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-item {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.nav-link {
    padding: var(--spacing-sm) 0;
    font-weight: 500;
    color: var(--gray-dark);
    border-bottom: 2px solid transparent;
    transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--green-600);
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.dropdown-toggle i {
    font-size: 0.75rem;
    transition: var(--transition-fast);
}

.dropdown:hover .dropdown-toggle i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    list-style: none;
    padding: var(--spacing-sm) 0;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--gray-dark);
    transition: var(--transition-fast);
}

.dropdown-menu a:hover {
    background: var(--green-50);
    color: var(--green-600);
}

.navbar-cta {
    display: flex;
    gap: var(--spacing-md);
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.navbar-toggle span {
    width: 25px;
    height: 3px;
    background: var(--gray-dark);
    border-radius: var(--radius-full);
    transition: var(--transition);
}

/* Mobile responsive */
@media (max-width: 768px) {
    .navbar-toggle {
        display: flex;
    }

    .navbar-collapse {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateX(-100%);
        transition: var(--transition);
        max-height: calc(100vh - 80px);
        overflow-y: auto;
    }

    .navbar-collapse.show {
        transform: translateX(0);
    }

    .navbar-nav {
        flex-direction: column;
        width: 100%;
        gap: 0;
    }

    .nav-link {
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--gray-medium);
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding-left: var(--spacing-lg);
        display: none;
    }

    .dropdown-menu.show {
        display: block;
    }

    .navbar-cta {
        width: 100%;
        justify-content: center;
    }
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    font-size: 1rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--green-600);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--green-700);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--blue-primary);
    color: var(--black-soft);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--blue-600);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-danger {
    background: var(--red-accent);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: var(--red-700);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--green-600);
    color: var(--green-600);
}

.btn-outline:hover:not(:disabled) {
    background: var(--green-600);
    color: white;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* ============================================================================
   FLASH MESSAGES
   ============================================================================ */

.flash-message {
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) auto;
    max-width: 600px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    animation: slideDown 0.3s ease;
}

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

.flash-success {
    background: var(--green-100);
    color: var(--green-800);
    border-left: 4px solid var(--green-600);
}

.flash-error {
    background: var(--red-100);
    color: var(--red-800);
    border-left: 4px solid var(--red-accent);
}

.flash-info {
    background: var(--blue-100);
    color: var(--blue-800);
    border-left: 4px solid var(--blue-primary);
}

/* ============================================================================
   CARDS
   ============================================================================ */

.card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.card-body {
    padding: var(--spacing-xl);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--black-soft);
}

.card-text {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-lg);
    background: var(--gray-light);
    border-top: 1px solid var(--gray-medium);
}

/* ============================================================================
   GRID SYSTEM
   ============================================================================ */

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(3, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-4,
    .grid-3,
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   FORMS
   ============================================================================ */

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-dark);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    transition: var(--transition-fast);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--green-600);
    box-shadow: 0 0 0 3px rgba(11, 110, 30, 0.1);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 1.5rem 1.5rem;
    padding-right: 2.5rem;
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

/* ============================================================================
   BADGES
   ============================================================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.badge-primary {
    background: var(--green-100);
    color: var(--green-800);
}

.badge-secondary {
    background: var(--blue-100);
    color: var(--blue-800);
}

.badge-danger {
    background: var(--red-100);
    color: var(--red-800);
}

/* ============================================================================
   FOOTER
   ============================================================================ */

.site-footer {
    background: var(--black-soft);
    color: var(--gray-300);
    margin-top: var(--spacing-3xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--spacing-2xl);
    padding: var(--spacing-3xl) 0;
}

.footer-section h3 {
    color: white;
    margin-bottom: var(--spacing-lg);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--gray-400);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    align-items: flex-start;
}

.footer-contact i {
    color: var(--green-500);
    margin-top: 4px;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--gray-800);
    color: white;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--green-600);
    transform: translateY(-2px);
}

.footer-newsletter {
    background: var(--gray-800);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-xl);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: var(--radius-lg);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--gray-800);
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: var(--gray-400);
}

.separator {
    color: var(--gray-dark);
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .footer-legal {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .newsletter-form {
        flex-direction: column;
    }
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

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

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.hidden { display: none !important; }

/* Logo dans le footer */
.footer-logo .logo {
    max-height: 60px;
    width: auto;
    object-fit: contain;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.footer-logo span {
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
}