:root {
    --primary: #45a735;
    --primary-hover: #3d932e;
    --bg-dark: #f0f2f5;
    --bg-card: #ffffff;
    --text-main: #1c1e21;
    --text-muted: #65676b;
    --accent: #45a735;
    --danger: #ef4444;
    --glass: rgba(255, 255, 255, 0.8);
    --border: #e4e6eb;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.5;
    overflow: hidden; /* Prevent body-level scrolling */
}

/* Background subtlety */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 30%, rgba(69, 167, 53, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(69, 167, 53, 0.03) 0%, transparent 50%);
    z-index: -1;
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-right: 1px solid var(--border);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-y: auto; /* Sidebar can scroll if links overflow */
    flex-shrink: 0;
}

.sidebar-logo {
    margin-bottom: 3rem;
}

.sidebar-logo img {
    max-width: 100%;
    height: auto;
}

.nav-links {
    list-style: none;
    flex-grow: 1;
}

.nav-links li {
    margin-bottom: 0.5rem;
}

.nav-links a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    background: var(--glass);
    color: var(--text-main);
}

.nav-links a i {
    margin-right: 12px;
}

/* Main Content */
.main-content {
    flex-grow: 1;
    padding: 2rem 3rem;
    height: 100vh;
    overflow-y: auto;
    background: var(--bg-dark);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.page-title {
    font-size: 1.8rem;
    font-weight: 700;
}

/* Cards & Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.stat-header {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
}

/* Tables */
.table-container {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow-x: auto;
    overflow-y: auto;
    max-height: 480px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background: rgba(255, 255, 255, 0.02);
    text-align: left;
    padding: 1rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-main);
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
    white-space: nowrap;
}

td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

tr:last-child td {
    border-bottom: none;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    vertical-align: middle;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.status-online {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent);
}

.status-offline {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

/* Buttons */
.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(69, 167, 53, 0.3);
}

.btn-secondary {
    background: #f3f4f6;
    color: var(--text-main);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: #e5e7eb;
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* Login Page */
.login-container {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    width: 100%;
    max-width: 400px;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    padding: 3rem;
    border-radius: 24px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    background: #fff;
    border: 1px solid var(--border);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    color: var(--text-main);
    outline: none;
    transition: border 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary);
}