:root {
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 70px;
    --primary: #0056b3;
    --primary-dark: #003d82;
    --accent: #ff6b00;
}

body {
    background-color: #f5f7fa;
    overflow-x: hidden;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: white;
    box-shadow: 2px 0 10px rgba(0,0,0,0.05);
    z-index: 1030;
    transition: transform 0.3s ease, width 0.3s ease;
    overflow-y: auto;
}

    .sidebar.collapsed {
        width: var(--sidebar-collapsed-width);
    }

/* En móvil, el sidebar se oculta con transform */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width) !important;
        box-shadow: none;
    }

        .sidebar.show {
            transform: translateX(0);
            box-shadow: 2px 0 10px rgba(0,0,0,0.1);
        }

        .sidebar.collapsed {
            width: var(--sidebar-width) !important; /* No aplica colapso en móvil */
        }
}

.sidebar .logo {
    padding: 20px;
    border-bottom: 1px solid #dee2e6;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar.collapsed .logo h2 {
    display: none;
}

.sidebar .logo h2 {
    color: var(--primary);
    font-size: 1.4rem;
    margin: 0;
}

.sidebar .logo span {
    color: var(--accent);
}

.sidebar-section {
    padding: 15px 0;
    border-bottom: 1px solid #dee2e6;
}

    .sidebar-section h6 {
        padding: 0 20px;
        color: var(--primary);
        font-size: 0.75rem;
        text-transform: uppercase;
        letter-spacing: 1px;
        margin-bottom: 10px;
    }

.sidebar.collapsed .sidebar-section h6 {
    display: none;
}

.sidebar .nav-link {
    padding: 12px 20px;
    color: #555;
    display: flex;
    align-items: center;
    white-space: nowrap;
    border-left: 3px solid transparent;
    transition: all 0.3s;
}

    .sidebar .nav-link:hover {
        background-color: #e9f2ff;
        color: var(--primary);
        border-left-color: var(--primary);
    }

    .sidebar .nav-link.active {
        background-color: #e9f2ff;
        color: var(--primary);
        border-left-color: var(--primary);
        font-weight: 600;
    }

    .sidebar .nav-link i {
        width: 24px;
        font-size: 1.2rem;
        margin-right: 12px;
    }

.sidebar.collapsed .nav-link span {
    display: none;
}

.sidebar.collapsed .nav-link i {
    margin-right: 0;
}

/* Overlay para móvil */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1020;
    opacity: 0;
    transition: opacity 0.3s ease;
}

    .sidebar-overlay.show {
        display: block;
        opacity: 1;
    }

/* Contenido principal */
.main-content {
    margin-left: var(--sidebar-width);
    transition: margin-left 0.3s ease;
    min-height: 100vh;
    padding: 20px;
}

    .main-content.expanded {
        margin-left: var(--sidebar-collapsed-width);
    }

@media (max-width: 768px) {
    .main-content,
    .main-content.expanded {
        margin-left: 0 !important;
    }
}

/* Header superior */
.top-header {
    background: white;
    border-radius: 10px;
    padding: 15px 25px;
    margin-bottom: 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.page-title h1 {
    color: var(--primary-dark);
    font-size: 1.8rem;
    margin: 0;
}

.page-title p {
    color: #666;
    margin: 5px 0 0 0;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .top-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .page-title h1 {
        font-size: 1.4rem;
    }

    .page-title p {
        font-size: 0.8rem;
    }
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

@media (max-width: 480px) {
    .user-menu {
        gap: 10px;
    }

    .user-info {
        display: none; /* Ocultar texto del usuario en móviles muy pequeños */
    }
}

.notification-badge {
    position: relative;
    cursor: pointer;
}

    .notification-badge .badge {
        position: absolute;
        top: -5px;
        right: -5px;
        font-size: 0.7rem;
    }

.user-avatar {
    width: 45px;
    height: 45px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.1rem;
}

/* Footer */
.main-footer {
    margin-left: var(--sidebar-width);
    transition: margin-left 0.3s ease;
    padding: 20px;
    background: white;
    margin-top: 30px;
    border-radius: 10px;
}

    .main-footer.expanded {
        margin-left: var(--sidebar-collapsed-width);
    }

@media (max-width: 768px) {
    .main-footer {
        margin-left: 0 !important;
    }
}

/* Dropdown de notificaciones */
.notifications-dropdown {
    width: 400px;
    max-height: 500px;
    overflow-y: auto;
    padding: 0;
}

@media (max-width: 480px) {
    .notifications-dropdown {
        width: 300px;
    }
}

.notification-item {
    padding: 15px;
    border-bottom: 1px solid #dee2e6;
    transition: background 0.3s;
}

    .notification-item:hover {
        background: #f8f9fa;
    }

    .notification-item.unread {
        background: #e9f2ff;
    }

.notification-icon {
    width: 35px;
    height: 35px;
    background: #e9f2ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

/* Loading spinner */
.loading-spinner {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
    justify-content: center;
    align-items: center;
}

    .loading-spinner.show {
        display: flex;
    }