:root {
    --bg: #f3f5f7;
    --surface: #ffffff;
    --ink: #1f2937;
    --muted: #6b7280;
    --brand: #0b4f6c;
    --brand-soft: #2a7da0;
    --line: #dce3ea;
    --danger: #b42318;
    --success-bg: #ecfdf3;
    --success-ink: #027a48;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #eef3f6 0%, #f8fafc 100%);
}

.container {
    width: min(1100px, 92vw);
    margin: 0 auto;
}

.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
}

.topbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 64px;
}

.brand {
    color: var(--brand);
    text-decoration: none;
    font-weight: 700;
    letter-spacing: 0.02em;
}

nav a {
    margin-left: 16px;
    color: var(--muted);
    text-decoration: none;
}

main { padding: 28px 0 48px; }

.section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.toolbar {
    display: flex;
    gap: 10px;
}

.toolbar form {
    margin: 0;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin: 20px 0;
}

.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 14px;
}

.card h2 {
    margin: 0 0 10px;
    font-size: 0.95rem;
    color: var(--muted);
}

.card strong {
    font-size: 1.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
}

th, td {
    border: 1px solid var(--line);
    padding: 10px;
    text-align: left;
}

.actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.actions form {
    margin: 0;
}

.btn {
    display: inline-block;
    padding: 8px 12px;
    border: 1px solid var(--brand);
    border-radius: 8px;
    color: #fff;
    background: var(--brand);
    text-decoration: none;
    cursor: pointer;
}

.btn-ghost {
    background: #fff;
    color: var(--brand);
}

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

.panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 14px;
}

.form-grid {
    display: grid;
    gap: 12px;
}

label {
    display: grid;
    gap: 6px;
    font-weight: 600;
}

input, select {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px;
    font: inherit;
}

.form-actions {
    margin-top: 8px;
}

.error {
    color: var(--danger);
    font-weight: 400;
}

.flash {
    border: 1px solid;
    border-radius: 10px;
    padding: 10px 12px;
    margin-bottom: 14px;
}

.flash-success {
    background: var(--success-bg);
    border-color: #a6f4c5;
    color: var(--success-ink);
}

@media (max-width: 860px) {
    nav { display: none; }
    .section-head {
        flex-direction: column;
        align-items: flex-start;
    }
    .actions {
        flex-direction: column;
        align-items: flex-start;
    }
}