:root {
    /* Paleta Premium Moderna */
    --kuka-primary: #4F46E5;
    --kuka-primary-glow: rgba(79, 70, 229, 0.4);
    --kuka-secondary: #8B5CF6;
    --kuka-accent: #EC4899;
    --kuka-bg: #F3F4F6;
    --kuka-white: #ffffff;
    --kuka-dark: #1F2937;
    --kuka-gray: #6B7280;
    --kuka-light-gray: #E5E7EB;
    
    --kuka-radius-lg: 16px;
    --kuka-radius-md: 12px;
    --kuka-radius-sm: 8px;

    --kuka-shadow-soft: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
    --kuka-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    
    --kuka-glass-bg: rgba(255, 255, 255, 0.75);
    --kuka-glass-border: 1px solid rgba(255, 255, 255, 0.5);
    --kuka-blur: 12px;
}

body {
    font-family: 'Outfit', 'Inter', sans-serif;
    background-color: var(--kuka-bg);
    color: var(--kuka-dark);
    -webkit-font-smoothing: antialiased;
}

/* Tipografía */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #111827;
}

/* Wrapper general */
.kuka-wrapper {
    display: flex;
    min-height: 100vh;
    padding: 20px;
    gap: 20px;
    background: radial-gradient(circle at top right, rgba(139, 92, 246, 0.05), transparent 40%),
                radial-gradient(circle at bottom left, rgba(79, 70, 229, 0.05), transparent 40%);
}

/* Sidebar Estilo Neo-Glassmorphism (Sin parecer AdminLTE) */
.kuka-sidebar {
    min-width: 260px;
    max-width: 260px;
    background: var(--kuka-glass-bg);
    backdrop-filter: blur(var(--kuka-blur));
    -webkit-backdrop-filter: blur(var(--kuka-blur));
    border: var(--kuka-glass-border);
    border-radius: var(--kuka-radius-lg);
    box-shadow: var(--kuka-shadow-soft);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    z-index: 10;
}

/* Branding */
.kuka-sidebar-brand {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--kuka-primary);
    background: linear-gradient(90deg, var(--kuka-primary), var(--kuka-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    border-bottom: 1px solid var(--kuka-light-gray);
}
.kuka-sidebar-brand .brand-icon {
    background: linear-gradient(135deg, var(--kuka-primary), var(--kuka-secondary));
    color: white;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--kuka-radius-md);
    -webkit-text-fill-color: white;
    box-shadow: 0 4px 14px var(--kuka-primary-glow);
}

/* Menú */
.kuka-nav {
    padding: 20px 10px;
    flex-grow: 1;
}
.kuka-nav-item {
    margin-bottom: 4px;
}
.kuka-nav-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 18px;
    color: var(--kuka-gray);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--kuka-radius-md);
    text-decoration: none;
    transition: all 0.25s ease;
}
.kuka-nav-link:hover {
    color: var(--kuka-primary);
    background: rgba(79, 70, 229, 0.06);
    transform: translateX(4px);
}
.kuka-nav-link i {
    font-size: 1.2rem;
    transition: transform 0.25s ease;
}
.kuka-nav-link:hover i {
    transform: scale(1.15);
}

.kuka-nav-item.active .kuka-nav-link {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(139, 92, 246, 0.1));
    color: var(--kuka-primary);
    position: relative;
    box-shadow: inset 3px 0 0 var(--kuka-primary);
}

/* Tarjeta Perfil Sidebar */
.kuka-profile-card {
    margin: 20px;
    padding: 16px;
    border-radius: var(--kuka-radius-md);
    background: white;
    border: 1px solid var(--kuka-light-gray);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}
.kuka-profile-card .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--kuka-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* Contenido Principal */
.kuka-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Topbar Header Flotante */
.kuka-topbar {
    background: var(--kuka-glass-bg);
    backdrop-filter: blur(var(--kuka-blur));
    -webkit-backdrop-filter: blur(var(--kuka-blur));
    border: var(--kuka-glass-border);
    border-radius: var(--kuka-radius-lg);
    box-shadow: var(--kuka-shadow-soft);
    padding: 12px 24px;
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Sobrescribir Cards de Bootstrap para hacerlas Premium */
.card {
    border: none;
    border-radius: var(--kuka-radius-lg);
    box-shadow: var(--kuka-shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: white;
    overflow: hidden;
}
.card:hover {
    box-shadow: var(--kuka-shadow-hover);
}
.card-header {
    background: transparent;
    border-bottom: 1px solid var(--kuka-light-gray);
    padding: 20px 24px;
}
.card-body {
    padding: 24px;
}

/* Botones Premium */
.btn-primary {
    background: linear-gradient(135deg, var(--kuka-primary), var(--kuka-secondary));
    border: none;
    border-radius: 50rem;
    padding: 8px 24px;
    font-weight: 600;
    box-shadow: 0 4px 14px var(--kuka-primary-glow);
    transition: all 0.3s ease;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--kuka-primary-glow);
}

/* Tablas Premium */
.table-custom {
    border-collapse: separate;
    border-spacing: 0 8px;
    background: transparent;
    border: none;
}
.table-custom thead {
    display: none; /* Ocultamos el thead oscuro tradicional de adminlte */
}
.table-custom tbody tr {
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
    border-radius: var(--kuka-radius-md);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.table-custom tbody tr:hover {
    transform: scale(1.005);
    box-shadow: var(--kuka-shadow-soft);
}
.table-custom tbody td {
    border: none;
    padding: 18px 20px;
    vertical-align: middle;
}
.table-custom tbody td:first-child {
    border-top-left-radius: var(--kuka-radius-md);
    border-bottom-left-radius: var(--kuka-radius-md);
}
.table-custom tbody td:last-child {
    border-top-right-radius: var(--kuka-radius-md);
    border-bottom-right-radius: var(--kuka-radius-md);
}

/* Animaciones */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-fade-in {
    animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ==========================================================================
   RESPONSIVE DESIGN & MOBILE OPTIMIZATIONS
   ========================================================================== */

@media (max-width: 991.98px) {
    .kuka-wrapper {
        padding: 10px;
        gap: 0;
    }

    .kuka-sidebar {
        position: fixed;
        left: -280px;
        top: 10px;
        bottom: 10px;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1050;
    }

    .kuka-sidebar.show {
        left: 10px;
    }

    .kuka-sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.3);
        backdrop-filter: blur(4px);
        z-index: 1040;
    }

    .kuka-sidebar-overlay.show {
        display: block;
    }

    .kuka-topbar {
        padding: 8px 16px;
        margin-bottom: 16px;
    }

    /* Tablas en móvil: Scroll horizontal suave */
    .table-responsive {
        border: none;
        padding-bottom: 5px;
    }
    
    .table-custom tbody td {
        white-space: nowrap;
        padding: 12px 15px;
    }
}

@media (max-width: 575.98px) {
    .login-glass {
        padding: 30px 20px;
    }
    
    .fs-2 { font-size: 1.5rem !important; }
    
    .kuka-sidebar-brand {
        padding: 16px;
    }
}

/* Utilidades para ocultar/mostrar el menú con JS */
.menu-toggle-btn {
    display: none;
}

@media (max-width: 991.98px) {
    .menu-toggle-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: white;
        border-radius: 10px;
        border: 1px solid var(--kuka-light-gray);
        color: var(--kuka-primary);
        cursor: pointer;
    }
}