:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #10b981;
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --sidebar-width: 250px;
    --glass-blur: blur(16px);
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    min-height: 100vh;
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,0.2) 0, transparent 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,0.1) 0, transparent 50%);
    background-attachment: fixed;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.025em;
}

/* Glassmorphism Classes */
.glass-panel {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Layout */
.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 10;
}

.sidebar-brand {
    padding: 1.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-brand i {
    color: var(--primary-color);
}

.sidebar-nav {
    padding: 1rem 0;
    flex: 1;
}

.nav-item {
    margin: 0.25rem 1rem;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    text-decoration: none;
    font-weight: 500;
    gap: 0.75rem;
}

.nav-link:hover, .nav-link.active {
    color: #fff;
    background: rgba(99, 102, 241, 0.15);
}

.nav-link.active {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.top-header {
    height: 70px;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 5;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
}

/* Views */
.view-section {
    display: none;
    padding: 2rem;
    animation: fadeIn 0.4s ease-in-out;
}

.view-section.active {
    display: block;
}

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

/* Dashboard Cards */
.dash-card {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: transform 0.3s ease;
}

.dash-card:hover {
    transform: translateY(-5px);
}

.dash-card-icon {
    width: 60px;
    height: 60px;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.icon-blue { background: rgba(59, 130, 246, 0.2); color: #3b82f6; }
.icon-green { background: rgba(16, 185, 129, 0.2); color: #10b981; }
.icon-purple { background: rgba(139, 92, 246, 0.2); color: #8b5cf6; }

.dash-card-info h3 {
    margin: 0;
    font-size: 2rem;
    color: #fff;
}

.dash-card-info p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Tables */
.table {
    color: var(--text-main);
    margin-bottom: 0;
}

.table > :not(caption) > * > * {
    background-color: transparent;
    border-bottom-color: var(--border-color);
    padding: 1rem;
    color: var(--text-main);
}

.table th {
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    border-top: none;
}

.table tbody tr {
    transition: background-color 0.2s;
}

.table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

/* Forms & Inputs */
.form-control, .form-select {
    background-color: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    color: #fff;
}

.form-control:focus, .form-select:focus {
    background-color: rgba(15, 23, 42, 0.8);
    border-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.25);
}

.form-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Modals */
.modal-content {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border-radius: 1rem;
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
}

.modal-footer {
    border-top: 1px solid var(--border-color);
}

.btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

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

/* Utilities */
.text-gradient {
    background: linear-gradient(135deg, #6366f1, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}