:root {
    --primary-color: #0f172a;
    --secondary-color: #334155;
    --accent-color: #2563eb;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --error-color: #ef4444;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Helper Classes */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
}

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

.btn-primary:hover {
    background-color: #1d4ed8;
}

.btn-outline {
    border: 1px solid var(--border-color);
    background: transparent;
}

.card {
    background: var(--surface-color);
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 16px;
}

/* Layout */
.navbar {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 20px;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 24px;
}

/* Auth Pages */
.auth-container {
    max-width: 400px;
    margin: 60px auto;
}

/* Dashboard */
.dashboard-grid {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 24px;
    margin-top: 24px;
}

.sidebar {
    background: var(--surface-color);
    border-radius: 8px;
    padding: 16px;
    height: calc(100vh - 100px);
}

.sidebar-menu a {
    display: block;
    padding: 12px;
    margin-bottom: 4px;
    border-radius: 6px;
}

.sidebar-menu a:hover {
    background: var(--background-color);
    color: var(--accent-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--surface-color);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    color: var(--secondary-color);
    font-size: 14px;
}