:root {
    --color-bg: #f5f6f8;
    --color-surface: #ffffff;
    --color-border: #dde1e6;
    --color-text: #1f2430;
    --color-muted: #6b7280;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-success-bg: #ecfdf3;
    --color-success-text: #065f46;
    --color-error-bg: #fef2f2;
    --color-error-text: #991b1b;
    --radius: 8px;
}

* { box-sizing: border-box; }

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

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

.topbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.topbar-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 24px;
}

.brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-text);
    text-decoration: none;
}

.topbar nav {
    display: flex;
    gap: 16px;
    flex: 1;
}

.topbar nav a {
    color: var(--color-muted);
    text-decoration: none;
    font-size: 0.95rem;
}

.topbar nav a:hover {
    color: var(--color-primary);
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.topbar-user a {
    color: var(--color-primary);
    text-decoration: none;
}

h1 { font-size: 1.6rem; margin: 0 0 16px; }
h2 { font-size: 1.15rem; margin: 24px 0 12px; }

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 24px;
}

.card-narrow { max-width: 520px; }

form label {
    display: block;
    font-size: 0.85rem;
    color: var(--color-muted);
    margin: 12px 0 4px;
}

form label:first-of-type { margin-top: 0; }

input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="month"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.95rem;
    background: var(--color-surface);
    color: var(--color-text);
}

textarea { resize: vertical; }

button, .button {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 9px 16px;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
    margin-top: 16px;
}

button:hover, .button:hover { background: var(--color-primary-hover); }

.button-secondary {
    background: transparent;
    color: var(--color-muted);
    border: 1px solid var(--color-border);
}

.button-secondary:hover { background: var(--color-bg); }

.link-button {
    background: none;
    border: none;
    color: var(--color-primary);
    padding: 0;
    margin: 0;
    font-size: 0.85rem;
    text-decoration: underline;
    cursor: pointer;
}

.inline-form { display: inline; }

.filter-form {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    gap: 12px;
    margin-bottom: 16px;
}

.filter-form label { margin: 0 0 4px; }

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.table th, .table td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}

.table th {
    background: var(--color-bg);
    font-weight: 600;
    color: var(--color-muted);
}

.table tr:last-child td { border-bottom: none; }

.stat-row {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px 20px;
    min-width: 200px;
}

.stat-label { color: var(--color-muted); font-size: 0.85rem; }
.stat-value { font-size: 1.6rem; font-weight: 700; margin-top: 4px; }

.flash {
    padding: 10px 14px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.flash-success { background: var(--color-success-bg); color: var(--color-success-text); }
.flash-error { background: var(--color-error-bg); color: var(--color-error-text); }