:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #dc2626;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    margin: 0;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 10;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    height: 64px;
    gap: 32px;
}

.logo {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    transition: all 0.15s ease;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.container {
    max-width: 1200px;
    margin: 32px auto;
    padding: 0 24px;
}

.page-title {
    margin: 0 0 24px 0;
    font-size: 1.75rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.card h2 {
    margin: 0 0 8px 0;
    font-size: 1.1rem;
    color: var(--text-muted);
    font-weight: 600;
}

.card .number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
}

.form-card {
    max-width: 600px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.form-group .required {
    color: var(--danger);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--card);
    color: var(--text);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 8px;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
}

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

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

.btn-danger {
    background: white;
    color: var(--danger);
    border: 1px solid var(--danger);
    padding: 6px 12px;
    font-size: 0.875rem;
}

.btn-danger:hover {
    background: var(--danger);
    color: white;
}

table {
    width: 100%;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    border-collapse: collapse;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

thead {
    background: var(--text);
    color: white;
}

th, td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    font-weight: 600;
    font-size: 0.875rem;
}

tbody tr:hover {
    background: #f8fafc;
}

.empty {
    color: var(--text-muted);
    padding: 24px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.flash {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-weight: 500;
}

.flash.success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #86efac;
}

.flash.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.hero {
    text-align: center;
    padding: 64px 24px;
}

.hero h1 {
    font-size: 2.5rem;
    margin: 0 0 16px 0;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 32px auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 640px) {
    .nav-links { gap: 16px; font-size: 0.9rem; }
    .grid { grid-template-columns: 1fr; }
    th, td { padding: 10px 12px; font-size: 0.9rem; }
    .hero h1 { font-size: 1.75rem; }
}