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

:root {
    --primary-color: #4A90E2;
    --secondary-color: #7B68EE;
    --success-color: #4CAF50;
    --danger-color: #F44336;
    --warning-color: #FF9800;
    --dark-color: #2C3E50;
    --light-color: #ECF0F1;
    --white: #FFFFFF;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-wave: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background: var(--light-color);
    overflow-x: hidden;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes wave {
    0% {
        transform: translateX(0) translateZ(0) scaleY(1);
    }
    50% {
        transform: translateX(-25%) translateZ(0) scaleY(0.55);
    }
    100% {
        transform: translateX(-50%) translateZ(0) scaleY(1);
    }
}

/* Page de Login/Accueil */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-wave);
    position: relative;
    overflow: hidden;
}

.wave-background {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120" preserveAspectRatio="none"><path d="M0,0V46.29c47.79,22.2,103.59,32.17,158,28,70.36-5.37,136.33-33.31,206.8-37.5C438.64,32.43,512.34,53.67,583,72.05c69.27,18,138.3,24.88,209.4,13.08,36.15-6,69.85-17.84,104.45-29.34C989.49,25,1113-14.29,1200,52.47V0Z" opacity=".25" fill="%23ffffff"/><path d="M0,0V15.81C13,36.92,27.64,56.86,47.69,72.05,99.41,111.27,165,111,224.58,91.58c31.15-10.15,60.09-26.07,89.67-39.8,40.92-19,84.73-46,130.83-49.67,36.26-2.85,70.9,9.42,98.6,31.56,31.77,25.39,62.32,62,103.63,73,40.44,10.79,81.35-6.69,119.13-24.28s75.16-39,116.92-43.05c59.73-5.85,113.28,22.88,168.9,38.84,30.2,8.66,59,6.17,87.09-7.5,22.43-10.89,48-26.93,60.65-49.24V0Z" opacity=".5" fill="%23ffffff"/><path d="M0,0V5.63C149.93,59,314.09,71.32,475.83,42.57c43-7.64,84.23-20.12,127.61-26.46,59-8.63,112.48,12.24,165.56,35.4C827.93,77.22,886,95.24,951.2,90c86.53-7,172.46-45.71,248.8-84.81V0Z" fill="%23ffffff"/></svg>') repeat-x;
    animation: wave 25s cubic-bezier(0.36, 0.45, 0.63, 0.53) infinite;
    opacity: 0.3;
}

.wave-background:nth-of-type(2) {
    animation: wave 20s cubic-bezier(0.36, 0.45, 0.63, 0.53) infinite reverse;
    opacity: 0.5;
}

.login-box {
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow);
    padding: 3rem;
    width: 90%;
    max-width: 450px;
    position: relative;
    z-index: 10;
    animation: fadeInUp 0.6s ease;
}

.login-box h1 {
    text-align: center;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
    font-size: 2rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-box .subtitle {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.9rem 1rem;
    border: 2px solid #e1e8ed;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.1);
}

.btn {
    display: inline-block;
    padding: 0.9rem 2rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-1);
    color: var(--white);
    width: 100%;
}

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

.btn-secondary {
    background: var(--gradient-3);
    color: var(--white);
}

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

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

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
}

.link-text {
    text-align: center;
    margin-top: 1.5rem;
    color: #7f8c8d;
    font-size: 0.95rem;
}

.link-text a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.link-text a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.alert {
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.4s ease;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-left: 4px solid var(--success-color);
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border-left: 4px solid var(--danger-color);
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-left: 4px solid var(--primary-color);
}

/* Dashboard Layout */
.dashboard {
    min-height: 100vh;
    display: flex;
    background: #f5f7fa;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--white);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: transform 0.3s ease;
    z-index: 1000;
}

.sidebar-header {
    padding: 2rem 1.5rem;
    border-bottom: 1px solid #e1e8ed;
    background: var(--gradient-1);
}

.sidebar-header h2 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.sidebar-header p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.sidebar-menu {
    list-style: none;
    padding: 1rem 0;
}

.sidebar-menu li {
    margin: 0.3rem 0;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    color: var(--dark-color);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.1) 0%, transparent 100%);
    color: var(--primary-color);
}

.sidebar-menu a.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient-1);
}

.sidebar-menu a i {
    margin-right: 1rem;
    font-size: 1.2rem;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 2rem;
    transition: margin-left 0.3s ease;
}

.top-bar {
    background: var(--white);
    padding: 1.5rem 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.welcome-text h3 {
    color: var(--dark-color);
    margin-bottom: 0.3rem;
}

.welcome-text p {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.top-bar-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.content-card {
    background: var(--white);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    animation: fadeInUp 0.5s ease;
}

.content-card h2 {
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
}

.stat-card:nth-child(2)::before {
    background: var(--gradient-2);
}

.stat-card:nth-child(3)::before {
    background: var(--gradient-3);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.stat-card h3 {
    color: #7f8c8d;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.stat-card .value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.stat-card .trend {
    font-size: 0.85rem;
    color: var(--success-color);
}

/* Profile Page */
.profile-header {
    text-align: center;
    padding: 2rem;
    background: var(--gradient-1);
    border-radius: 15px;
    color: var(--white);
    margin-bottom: 2rem;
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 3rem;
    color: var(--primary-color);
    border: 4px solid rgba(255, 255, 255, 0.3);
}

.profile-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Contact Page */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: var(--white);
    box-shadow: var(--shadow);
}

.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    margin-right: 1rem;
    font-size: 1.5rem;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1100;
    background: var(--white);
    border: none;
    padding: 0.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    margin: 5px 0;
    transition: all 0.3s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 1rem;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .login-box {
        padding: 2rem 1.5rem;
    }

    .top-bar {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .cards-grid {
        grid-template-columns: 1fr;
    }

    .profile-form {
        grid-template-columns: 1fr;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }