/* ==========================================================================
   YAV UNIVERSITY CONNECT - CHARTE GRAPHIQUE & INTERACTION DESIGN
   ========================================================================== */

/* 1. VARIABLES & THEMING */
:root {
    /* Mode Clair */
    --bg-primary: #F1F5F9;
    --bg-card: #FFFFFF;
    --bg-sidebar: #0A192F;
    --text-primary: #0F172A;
    --text-secondary: #64748B;
    --text-sidebar: #94A3B8;
    
    /* Couleurs Blason YAV */
    --primary-blue: #0A192F;
    --secondary-blue: #1D3557;
    --accent-red: #C91A25;
    --accent-red-hover: #A0131C;
    --accent-glow: rgba(201, 26, 37, 0.25);
    
    /* UI & Ombrages */
    --border-color: #E2E8F0;
    --input-bg: #FFFFFF;
    --input-border: #CBD5E1;
    
    --shadow-sm: 0 2px 4px rgba(10, 25, 47, 0.04);
    --shadow-md: 0 10px 20px -5px rgba(10, 25, 47, 0.08);
    --shadow-lg: 0 20px 25px -5px rgba(10, 25, 47, 0.12);
    --shadow-hover: 0 20px 30px -10px rgba(201, 26, 37, 0.2);
    
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    
    --transition-fast: 0.15s ease;
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

[data-theme="dark"] {
    --bg-primary: #080F1E;
    --bg-card: #0F172A;
    --bg-sidebar: #050B14;
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-sidebar: #64748B;
    
    --border-color: #1E293B;
    --input-bg: #1A2436;
    --input-border: #334155;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 10px 20px -5px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}


/* 2. REINITIALISATION & ANIMATIONS DE BASE */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Plus Jakarta Sans', 'Segoe UI', system-ui, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

/* Keyframe Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulseGlow {
    0% { box-shadow: 0 0 0 0 var(--accent-glow); }
    70% { box-shadow: 0 0 0 10px rgba(201, 26, 37, 0); }
    100% { box-shadow: 0 0 0 0 rgba(201, 26, 37, 0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

/* Classe d'animation réutilisable */
.animate-fade-in {
    animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* 3. LAYOUT & SIDEBAR INTELLIGENTE */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    width: 270px;
    background-color: var(--bg-sidebar);
    color: var(--text-sidebar);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    transition: transform var(--transition-smooth);
}

.sidebar-header {
    padding: 24px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-logo {
    width: 42px;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
    transition: transform var(--transition-bounce);
}

.sidebar-header:hover .sidebar-logo {
    transform: rotate(5deg) scale(1.08);
}

.sidebar-menu {
    list-style: none;
    padding: 20px 12px;
    flex-grow: 1;
}

.sidebar-item {
    margin-bottom: 6px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    color: var(--text-sidebar);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.92rem;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-smooth);
}

.sidebar-link i {
    font-size: 1.15rem;
    transition: transform var(--transition-bounce);
}

.sidebar-link:hover {
    color: #FFFFFF;
    background: rgba(255, 255, 255, 0.06);
    transform: translateX(4px);
}

.sidebar-link:hover i {
    transform: scale(1.2);
    color: var(--accent-red);
}

.sidebar-link.active {
    background: linear-gradient(135deg, var(--accent-red), #E52E39);
    color: #FFFFFF;
    box-shadow: 0 8px 15px rgba(201, 26, 37, 0.3);
}

.sidebar-link.active i {
    color: #FFFFFF;
}

/* 4. CARTES & CONTENEURS DYNAMIQUES */
.app-main {
    flex-grow: 1;
    margin-left: 270px;
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: margin-left var(--transition-smooth);
}

.content-body {
    padding: 30px;
}

.card {
    background-color: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 28px;
    margin-bottom: 25px;
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

/* Effet d'élévation au survol des cartes */
.card-interactive:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(201, 26, 37, 0.3);
}

.card-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-blue);
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 22px;
}

[data-theme="dark"] .card-title {
    color: #FFFFFF;
}

/* 5. BOUTONS & EFFETS INTERACTIFS (RIPPLE / CLICK) */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    overflow: hidden;
    user-select: none;
    transition: all var(--transition-smooth);
}

/* Animation d'enfoncement au clic */
.btn:active {
    transform: scale(0.96) !important;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-red), #A0131C);
    color: #FFFFFF;
    box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

/* Effet Vague (Ripple Effect) au clic sur les boutons */
.ripple {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    animation: ripple-animation 0.6s linear;
    background-color: rgba(255, 255, 255, 0.4);
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* 6. FORMULAIRES HIGH-TECH ET ERGONOMIQUES */
.form-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 20px;
}

.col-12 { grid-column: span 12; }
.col-6  { grid-column: span 6; }
.col-4  { grid-column: span 4; }
.col-3  { grid-column: span 3; }

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--input-bg);
    border: 2px solid var(--input-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition-smooth);
}

/* Focus animé sur les inputs */
.form-control:focus {
    outline: none;
    border-color: var(--accent-red);
    box-shadow: 0 0 0 4px var(--accent-glow);
    background-color: var(--bg-card);
}

.form-group:focus-within .form-label {
    color: var(--accent-red);
}

/* 7. RESPONSIVE DESIGN & MOBILE MENU Yves Ngoma Ingénieur Fuill stack*/
@media (max-width: 992px) {
    .app-sidebar {
        transform: translateX(-100%);
    }
    .app-sidebar.show {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }
    .app-main {
        margin-left: 0;
    }
    .col-6, .col-4, .col-3 {
        grid-column: span 12;
    }
}
/* Layout Principal avec Sidebar */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    width: 260px;
    background-color: var(--bg-card);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    transition: background-color 0.3s, border-color 0.3s;
}

.main-wrapper {
    margin-left: 260px;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* En-tête Sidebar */
.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    object-fit: cover;
}

.brand-title {
    display: block;
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--primary-blue);
    line-height: 1.1;
}

.brand-sub {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

/* Menu de navigation */
.sidebar-menu {
    padding: 15px 12px;
    flex: 1;
    overflow-y: auto;
}

.menu-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--text-secondary);
    padding: 15px 12px 6px;
    letter-spacing: 0.5px;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: var(--text-main);
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    margin-bottom: 4px;
    transition: all 0.2s ease;
}

.menu-item i {
    font-size: 1.05rem;
    width: 20px;
    text-align: center;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.menu-item:hover {
    background-color: rgba(2, 132, 199, 0.08);
    color: var(--primary-blue);
}

.menu-item:hover i {
    color: var(--primary-blue);
}

.menu-item.active {
    background-color: var(--primary-blue);
    color: #FFFFFF;
}

.menu-item.active i {
    color: #FFFFFF;
}

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--border-color);
}

.logout-link {
    color: var(--accent-red) !important;
}

.logout-link i {
    color: var(--accent-red) !important;
}

.logout-link:hover {
    background-color: rgba(239, 68, 68, 0.1) !important;
}
/* Header Supérieur */
.navbar-custom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 30px;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 99;
}

/* Avatar dans le Header (Fixe la taille géante de l'image) */
.profile-avatar-nav {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-blue);
}

/* Bouton bascule de thème */
.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* Zone principale de contenu */
.dashboard-container {
    padding: 30px;
}