/**
 * Styles CSS Modernes pour l'Authentification
 * ProClimat Congo - Design Professionnel et Épuré
 * Mobile-First Responsive Design
 */

/* ===== VARIABLES CSS - PALETTE PROCLIMAT ===== */
:root {
    /* Couleurs principales ProClimat */
    --pc-green-dark: #1e6b44;
    --pc-green-primary: #2e8b57;
    --pc-green-medium: #3d9970;
    --pc-green-material: #4CAF50;
    --pc-green-light: #66BB6A;
    --pc-green-lighter: #81C784;
    --pc-green-pale: #A5D6A7;
    
    /* Couleurs système */
    --pc-white: #FFFFFF;
    --pc-gray-50: #F9FAFB;
    --pc-gray-100: #F3F4F6;
    --pc-gray-200: #E5E7EB;
    --pc-gray-300: #D1D5DB;
    --pc-gray-400: #9CA3AF;
    --pc-gray-500: #6B7280;
    --pc-gray-600: #4B5563;
    --pc-gray-700: #374151;
    --pc-gray-800: #1F2937;
    --pc-gray-900: #111827;
    
    /* Couleurs de statut */
    --pc-success: #10B981;
    --pc-warning: #F59E0B;
    --pc-error: #EF4444;
    --pc-info: #3B82F6;
    
    /* Effets et 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Espacements */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Bordures */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
}

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

body.auth-page {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--pc-green-dark) 0%, var(--pc-green-primary) 50%, var(--pc-green-medium) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    position: relative;
    overflow-x: hidden;
}

/* ===== ARRIÈRE-PLAN DÉCORATIF ===== */
body.auth-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.08) 0%, transparent 50%),
        url('data:image/svg+xml,%3Csvg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%23ffffff" fill-opacity="0.03"%3E%3Cpath d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
    opacity: 0.5;
    z-index: 0;
    pointer-events: none;
}

/* ===== CONTENEUR PRINCIPAL ===== */
.auth-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
    animation: fadeInUp var(--transition-slow) ease-out;
}

/* ===== CARTE D'AUTHENTIFICATION ===== */
.auth-card {
    background: var(--pc-white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.auth-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.3);
}

/* ===== EN-TÊTE ===== */
.auth-header {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-xl) var(--spacing-xl);
    background: linear-gradient(135deg, var(--pc-green-primary) 0%, var(--pc-green-medium) 100%);
    position: relative;
    overflow: hidden;
}

.auth-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.auth-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--pc-white);
    backdrop-filter: blur(10px);
    border: 3px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1;
    transition: transform var(--transition-base);
}

.auth-logo:hover {
    transform: scale(1.05) rotate(5deg);
}

.auth-logo img {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.auth-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--pc-white);
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.auth-subtitle {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    position: relative;
    z-index: 1;
}

/* ===== CORPS DU FORMULAIRE ===== */
.auth-body {
    padding: var(--spacing-2xl) var(--spacing-xl);
}

.auth-description {
    color: var(--pc-gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

/* ===== GROUPES DE FORMULAIRE ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--pc-gray-700);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-fast);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--pc-gray-900);
    background-color: var(--pc-gray-50);
    border: 2px solid var(--pc-gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    outline: none;
}

.form-control:hover {
    border-color: var(--pc-gray-300);
    background-color: var(--pc-white);
}

.form-control:focus {
    border-color: var(--pc-green-light);
    background-color: var(--pc-white);
    box-shadow: 0 0 0 4px rgba(102, 187, 106, 0.1);
}

.form-control::placeholder {
    color: var(--pc-gray-400);
}

.form-control:disabled {
    background-color: var(--pc-gray-100);
    cursor: not-allowed;
    opacity: 0.6;
}

/* ===== CONTENEUR MOT DE PASSE ===== */
.password-container {
    position: relative;
}

.password-input {
    padding-right: 3rem;
}

.password-toggle {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    width: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--pc-gray-400);
    cursor: pointer;
    transition: color var(--transition-fast);
    outline: none;
}

.password-toggle:hover {
    color: var(--pc-green-light);
}

.password-toggle:focus {
    color: var(--pc-green-primary);
}

/* ===== BOUTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    outline: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width var(--transition-base), height var(--transition-base);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--pc-green-light) 0%, var(--pc-green-material) 100%);
    color: var(--pc-white);
    box-shadow: 0 4px 12px rgba(102, 187, 106, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--pc-green-material) 0%, var(--pc-green-primary) 100%);
    box-shadow: 0 6px 20px rgba(102, 187, 106, 0.4);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(102, 187, 106, 0.3);
}

.btn-primary:disabled {
    background: var(--pc-gray-300);
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.btn-secondary {
    background: var(--pc-white);
    color: var(--pc-green-primary);
    border-color: var(--pc-gray-300);
}

.btn-secondary:hover {
    background: var(--pc-gray-50);
    border-color: var(--pc-green-light);
    color: var(--pc-green-primary);
}

.w-100 {
    width: 100%;
}

/* ===== INDICATEUR DE CHARGEMENT ===== */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    border-top-color: var(--pc-white);
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== ALERTES ===== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    line-height: 1.5;
    animation: slideDown var(--transition-base) ease-out;
}

.alert i {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.alert-success {
    background: #ECFDF5;
    color: #065F46;
    border-left: 4px solid var(--pc-success);
}

.alert-danger {
    background: #FEF2F2;
    color: #991B1B;
    border-left: 4px solid var(--pc-error);
}

.alert-warning {
    background: #FFFBEB;
    color: #92400E;
    border-left: 4px solid var(--pc-warning);
}

.alert-info {
    background: #EFF6FF;
    color: #1E40AF;
    border-left: 4px solid var(--pc-info);
}

/* ===== INFO BOX ===== */
.info-box {
    background: #EFF6FF;
    border: 1px solid #BFDBFE;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.info-icon {
    color: var(--pc-info);
    font-size: 1.25rem;
    margin-right: var(--spacing-md);
}

.info-title {
    font-weight: 600;
    color: #1E40AF;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9375rem;
}

.info-text {
    color: var(--pc-gray-600);
    font-size: 0.875rem;
    line-height: 1.6;
    margin: 0;
}

/* ===== LISTE DES FONCTIONNALITÉS ===== */
.features-section {
    margin: var(--spacing-xl) 0;
}

.features-title {
    color: var(--pc-green-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    font-size: 0.9375rem;
}

.features-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.features-list li {
    color: var(--pc-gray-600);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-lg);
    position: relative;
}

.features-list li::before {
    content: "✓";
    color: var(--pc-green-light);
    font-weight: bold;
    position: absolute;
    left: 0;
    font-size: 1rem;
}

/* ===== PIED DE PAGE ===== */
.auth-footer {
    text-align: center;
    padding: 0 var(--spacing-xl) var(--spacing-2xl);
    color: var(--pc-gray-600);
    font-size: 0.875rem;
}

.auth-footer a {
    color: var(--pc-green-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.auth-footer a:hover {
    color: var(--pc-green-dark);
    text-decoration: underline;
}

/* ===== CHECKBOX REMEMBER ME ===== */
.remember-me {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
}

.remember-me input[type="checkbox"] {
    width: 18px;
    height: 18px;
    border: 2px solid var(--pc-gray-300);
    border-radius: var(--radius-sm);
    cursor: pointer;
    accent-color: var(--pc-green-light);
}

.remember-me label {
    font-size: 0.875rem;
    color: var(--pc-gray-700);
    cursor: pointer;
    user-select: none;
}

/* ===== RESPONSIVE - MOBILE FIRST ===== */

/* Très petits écrans (< 375px) */
@media (max-width: 374px) {
    .auth-wrapper {
        max-width: 100%;
    }
    
    .auth-header {
        padding: var(--spacing-xl) var(--spacing-md) var(--spacing-lg);
    }
    
    .auth-body {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .auth-footer {
        padding: 0 var(--spacing-md) var(--spacing-xl);
    }
    
    .auth-logo {
        width: 70px;
        height: 70px;
        font-size: 2rem;
    }
    
    .auth-title {
        font-size: 1.5rem;
    }
    
    .form-control {
        padding: 0.625rem 0.875rem;
        font-size: 0.875rem;
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }
}

/* Petits écrans (375px - 575px) */
@media (min-width: 375px) and (max-width: 575px) {
    body.auth-page {
        padding: var(--spacing-lg);
    }
}

/* Tablettes (576px - 767px) */
@media (min-width: 576px) {
    .auth-wrapper {
        max-width: 480px;
    }
}

/* Desktop (≥ 768px) */
@media (min-width: 768px) {
    body.auth-page {
        padding: var(--spacing-2xl);
    }
    
    .auth-wrapper {
        max-width: 500px;
    }
    
    .auth-logo {
        width: 90px;
        height: 90px;
        font-size: 3rem;
    }
    
    .auth-title {
        font-size: 2rem;
    }
    
    .auth-subtitle {
        font-size: 1rem;
    }
}

/* ===== ANIMATIONS D'ENTRÉE ===== */
.fade-in {
    animation: fadeIn var(--transition-base) ease-out;
}

.slide-in-left {
    animation: slideInLeft var(--transition-base) ease-out;
}

.slide-in-right {
    animation: slideInRight var(--transition-base) ease-out;
}

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

/* Focus visible pour l'accessibilité clavier */
*:focus-visible {
    outline: 2px solid var(--pc-green-light);
    outline-offset: 2px;
}

/* ===== UTILITAIRES ===== */
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.text-center { text-align: center; }
.text-muted { color: var(--pc-gray-500); }
.d-flex { display: flex; }
.align-items-start { align-items: flex-start; }
.gap-3 { gap: var(--spacing-lg); }

/* ===== PRINT STYLES ===== */
@media print {
    body.auth-page {
        background: white;
    }
    
    body.auth-page::before {
        display: none;
    }
    
    .auth-card {
        box-shadow: none;
        border: 1px solid var(--pc-gray-300);
    }
}