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

:root {
    --primary-navy: #0a1628;
    --secondary-navy: #15243d;
    --accent-red: #E31E24;
    --success-green: #22c55e;
    --warning-orange: #f97316;
    --info-blue: #3b82f6;
    --purple: #a855f7;
    --cyan: #06b6d4;
    --light-bg: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f1f5f9;
    min-height: 100vh;
    color: var(--text-primary);
}

/* Sidebar Styles */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 240px;
    height: 100vh;
    background: var(--primary-navy);
    padding: 0;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo-text {
    color: white;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.sidebar-role-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 10px 16px;
    background: rgba(100, 116, 139, 0.3);
    color: white;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
}

.sidebar-role-badge.admin {
    background: rgba(227, 30, 36, 0.2);
    border: 1px solid rgba(227, 30, 36, 0.3);
}

.sidebar-role-badge.alternant {
    background: rgba(34, 197, 94, 0.2);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.sidebar-menu {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
}

.sidebar-nav-item {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 8px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    font-size: 15px;
    font-weight: 500;
    text-align: left;
}

.sidebar-nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.sidebar-nav-item.active {
    background: rgba(59, 130, 246, 0.2);
    color: white;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.sidebar-nav-icon {
    font-size: 20px;
    width: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-footer-item {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 8px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    font-size: 14px;
    font-weight: 500;
    text-align: left;
}

.sidebar-footer-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.sidebar-footer-item.logout {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

.sidebar-footer-item.logout:hover {
    background: rgba(239, 68, 68, 0.3);
    color: #fef2f2;
}

/* Main Content */
.main-content {
    margin-left: 240px;
    padding: 32px;
    min-height: 100vh;
}

/* Page Container */
.page-container {
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Card Styles */
.card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

/* Button Styles */
.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

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

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

.btn-secondary {
    background: var(--light-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

.btn-white {
    background: white;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-white:hover {
    background: var(--light-bg);
}

.btn-white.active {
    background: var(--primary-navy);
    color: white;
    border-color: var(--primary-navy);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: white;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--light-bg);
    border-radius: 6px;
    font-size: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--accent-red);
    color: white;
    transform: rotate(90deg);
}

.modal-body {
    padding: 24px;
}

/* Form Styles */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
    color: var(--text-primary);
    background: white;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--info-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 70px;
    }

    .sidebar-header {
        padding: 16px 10px;
    }

    .logo-text,
    .sidebar-role-badge,
    .sidebar-nav-item span {
        display: none;
    }

    .sidebar-nav-item,
    .sidebar-footer-item {
        justify-content: center;
        padding: 12px;
    }

    .main-content {
        margin-left: 70px;
        padding: 16px;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

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

.mt-4 {
    margin-top: 20px;
}

.mb-4 {
    margin-bottom: 20px;
}