:root {
    --sidebar-bg: #0861dd;
    --sidebar-hover-bg: rgba(255, 255, 255, 0.1);
    --sidebar-active-bg: rgba(255, 255, 255, 0.25);
    --sidebar-text: #ffffff;
    --sidebar-text-muted: rgba(255, 255, 255, 0.75);
    --search-bg: rgba(255, 255, 255, 0.15);
}

.app-sidebar {
    background-color: var(--sidebar-bg) !important;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 4px 0 10px rgba(0, 0, 0, 0.3) !important;
    transition: all 0.3s ease;
}

.sidebar-brand {
    background-color: transparent !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05) !important;
    padding: 1.5rem 1rem !important;
}

.brand-link {
    display: flex !important;
    align-items: center;
    gap: 0.75rem;
}

.brand-text {
    font-weight: 700 !important;
    letter-spacing: 0.5px;
    color: var(--sidebar-text) !important;
}

/* Sidebar Menu Tweaks */
.nav-sidebar .nav-item > .nav-link {
    border-radius: 8px !important;
    margin: 0.2rem 0.75rem !important;
    padding: 0.6rem 0.75rem !important;
    transition: all 0.2s ease-in-out;
    color: var(--sidebar-text-muted) !important;
}

.nav-sidebar .nav-item > .nav-link i {
    font-size: 1.1rem;
    margin-right: 0.75rem;
    width: 1.5rem;
    text-align: center;
    transition: transform 0.2s ease;
}

.nav-sidebar .nav-item:hover > .nav-link {
    background-color: var(--sidebar-hover-bg) !important;
    color: var(--sidebar-text) !important;
}

.nav-sidebar .nav-item:hover > .nav-link i {
    transform: scale(1.1);
}

.nav-sidebar .nav-item > .nav-link.active {
    background: var(--sidebar-active-bg) !important;
    color: #ffffff !important;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.nav-header {
    margin-top: 1.5rem !important;
    padding: 0 1.5rem !important;
    font-size: 0.7rem !important;
    letter-spacing: 1.5px !important;
    color: var(--sidebar-text-muted) !important;
    opacity: 0.6;
}

/* Search Bar Redesign */
.sidebar-search-container {
    padding: 1rem 1.25rem !important;
}

.sidebar-search-container .input-group {
    background: var(--search-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(8px);
    transition: all 0.3s ease;
    overflow: hidden;
}

.sidebar-search-container .input-group-text {
    border: none !important;
    color: var(--sidebar-text-muted) !important;
    background: transparent !important;
    padding-right: 0;
}

.sidebar-search-container input {
    border: none !important;
    background: transparent !important;
    color: #fff !important;
    font-size: 0.875rem;
    padding: 0.6rem 0.75rem !important;
}

.sidebar-search-container input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.sidebar-search-container .input-group:focus-within {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
    background: rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   TOP NAVBAR - MODERN STYLING
   ========================================================================== */

.app-header {
    background: rgba(255, 255, 255, 0.85) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06) !important;
    padding: 0.4rem 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1030;
}

/* Iconos Circulares Profesionales */
.nav-icon-circle {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    color: #64748b !important;
    transition: all 0.3s ease;
    background: transparent;
}

.nav-icon-circle:hover {
    background-color: #f1f5f9;
    color: #2563eb !important;
    transform: rotate(5deg) scale(1.05);
}

/* Botón de Usuario Estilo "Pill" */
.user-pill-btn {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 14px !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-left: 1rem;
}

.user-pill-btn:hover {
    background: #ffffff;
    border-color: #2563eb;
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.1);
}

.user-pill-btn:active {
    transform: scale(0.98);
}

/* Avatar del Navbar */
.user-avatar-nav {
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
}

/* Utilidades de Texto */
.x-small {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 600;
}

/* Dropdown Modernizado */
.dropdown-menu-modern {
    border-radius: 18px !important;
    padding: 0;
    overflow: hidden;
    min-width: 300px;
    margin-top: 12px !important;
    animation: slideInDropdown 0.3s ease-out;
}

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

.user-header-modern {
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.user-avatar-large {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eff6ff;
    border-radius: 20px;
    color: #2563eb;
    margin: 0 auto;
}

.user-footer-modern .btn {
    font-weight: 600;
    letter-spacing: 0.3px;
    transition: all 0.2s ease;
}

.user-footer-modern .btn-outline-primary:hover {
    background-color: #2563eb;
    transform: translateY(-1px);
}

.user-footer-modern .btn-danger {
    background-color: #ef4444;
    border: none;
}

.user-footer-modern .btn-danger:hover {
    background-color: #dc2626;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}