* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #0a0e27;
    color: #e4e4e7;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.header p {
    opacity: 0.9;
    font-size: 1.1em;
}

/* Navigation */
.nav {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.nav a {
    padding: 12px 24px;
    background: #1e293b;
    color: #e4e4e7;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
    border: 1px solid #334155;
}

.nav a:hover {
    background: #334155;
    transform: translateY(-2px);
}

.nav a.active {
    background: #667eea;
    border-color: #667eea;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: #1e293b;
    padding: 25px;
    border-radius: 12px;
    border: 1px solid #334155;
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: #667eea;
}

.stat-card h3 {
    color: #94a3b8;
    font-size: 0.9em;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.stat-card .value {
    font-size: 2.5em;
    font-weight: bold;
    color: #667eea;
}

.stat-card .label {
    color: #64748b;
    font-size: 0.9em;
}

/* Section */
.section {
    background: #1e293b;
    padding: 25px;
    border-radius: 12px;
    border: 1px solid #334155;
    margin-bottom: 20px;
}

.section h2 {
    color: #667eea;
    margin-bottom: 20px;
}

.activity-item {
    padding: 15px;
    background: #0f172a;
    border-radius: 8px;
    margin-bottom: 10px;
    border-left: 3px solid #667eea;
}

.activity-time {
    color: #64748b;
    font-size: 0.85em;
}