:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --sidebar-bg: #1e1b4b;
    --sidebar-text: #c7d2fe;
    --sidebar-active: #4f46e5;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f8fafc;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.guest-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.guest-card {
    width: 100%;
    max-width: 440px;
    border: none;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.sidebar {
    width: 260px;
    min-height: 100vh;
    background-color: var(--sidebar-bg);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    padding-top: 1rem;
}

.sidebar .nav-link {
    color: var(--sidebar-text);
    padding: 0.6rem 1.25rem;
    border-radius: 6px;
    margin: 2px 0.75rem;
    font-size: 0.9rem;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background-color: var(--sidebar-active);
    color: #fff;
}

.sidebar .brand {
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
    padding: 0.5rem 1.25rem 1.5rem;
    display: block;
}

.main-content {
    margin-left: 260px;
    padding: 1.5rem 2rem;
}

.topbar {
    margin-left: 260px;
    background: #fff;
    border-bottom: 1px solid #e2e8f0;
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stat-card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}