:root {
    --bg-color: #0d1117;
    --panel-bg: rgba(22, 27, 34, 0.7);
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent-blue: #2f81f7;
    --accent-orange: #f0883e;
    --accent-green: #2ea043;
    --border-color: #30363d;
    --glass-blur: blur(16px);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(47, 129, 247, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(240, 136, 62, 0.15), transparent 25%);
    background-attachment: fixed;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--panel-bg);
    backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--border-color);
    padding: 24px 0;
    display: flex;
    flex-direction: column;
}

.brand {
    padding: 0 24px 32px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand span {
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 0 16px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    padding: 12px 16px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-links a:hover, .nav-links a.active {
    background: rgba(47, 129, 247, 0.1);
    color: var(--text-primary);
}

.nav-links a.active {
    border-left: 3px solid var(--accent-blue);
    border-radius: 0 8px 8px 0;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 32px 48px;
    overflow-y: auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.header h1 {
    font-size: 2rem;
    font-weight: 600;
}

/* Cards & Panels */
.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 2.2rem;
    font-weight: 700;
}

.stat-trend {
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 4px;
}

.trend-up { color: var(--accent-green); }
.trend-down { color: var(--accent-orange); }

/* Buttons & Inputs */
.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: #1f6feb;
    box-shadow: 0 0 15px rgba(47, 129, 247, 0.4);
}

input, select, textarea {
    background: rgba(13, 17, 23, 0.8);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 8px;
    outline: none;
    transition: border 0.3s;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--accent-blue);
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.1);
}

.badge-blue { background: rgba(47, 129, 247, 0.2); color: #79c0ff; }
.badge-orange { background: rgba(240, 136, 62, 0.2); color: #ffa657; }