:root {
    --bg-dark: #0a0a0a;
    --text-main: #ededed;
    --text-muted: #a1a1aa;
    --primary: #0070f3;
    --primary-hover: #0056b3;
    --accent: #00dfd8;
    --glass-bg: rgba(25, 25, 25, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3 { font-weight: 600; }
.text-gradient {
    background: linear-gradient(90deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.subtitle { color: var(--text-muted); margin-bottom: 2rem; }

/* Glassmorphism */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}
.header-actions a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}
.header-actions a:hover { color: var(--text-main); }

/* Dashboard Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}
.stat-card {
    display: flex;
    flex-direction: column;
}
.stat-title {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}
@media (max-width: 768px) {
    .charts-grid { grid-template-columns: 1fr; }
}
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* Login Form */
.login-body {
    justify-content: center;
    align-items: center;
}
.login-container {
    width: 100%;
    max-width: 400px;
    text-align: center;
}
.form-group {
    margin-bottom: 1.2rem;
    text-align: left;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.form-group input {
    width: 100%;
    padding: 0.8rem;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}
.form-group input:focus {
    border-color: var(--primary);
}
.btn-primary {
    width: 100%;
    padding: 0.8rem;
    border: none;
    border-radius: 8px;
    background: var(--primary);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}
.btn-primary:hover {
    background: var(--primary-hover);
}
.error-msg {
    background: rgba(255, 77, 77, 0.1);
    border: 1px solid rgba(255, 77, 77, 0.3);
    color: #ff4d4d;
    padding: 0.8rem;
    border-radius: 8px;
    margin-bottom: 1.2rem;
    font-size: 0.9rem;
}

/* Navbar */
.navbar {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
}
.navbar a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.2s;
    background: rgba(255,255,255,0.05);
}
.navbar a:hover, .navbar a.active {
    background: var(--primary);
    color: white;
}

/* Tables */
.table-container {
    overflow-x: auto;
    width: 100%;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}
th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}
th {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    font-weight: 600;
}
tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* Badges */
.badge {
    padding: 0.3rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: bold;
}
.badge-online { background: rgba(0, 223, 216, 0.2); color: #00dfd8; }
.badge-offline { background: rgba(255, 77, 77, 0.2); color: #ff4d4d; }