:root {
    --color-bg: #f6f7f9;
    --color-surface: #ffffff;
    --color-border: #dfe3e8;
    --color-text: #1f2933;
    --color-muted: #6b7280;
    --color-primary: #2b5797;
    --color-primary-dark: #1e3f70;
    --color-danger: #b3261e;
    --color-success: #1b7a3d;
    font-size: 15px;
}

* { 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);
}

.topbar {
    background: var(--color-primary-dark);
}
.topbar-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0.75rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.brand { color: #fff; font-weight: 600; text-decoration: none; }
.brand:hover { text-decoration: underline; }
.topbar nav a {
    color: #dbe4f0;
    text-decoration: none;
    margin-left: 1rem;
    font-size: 0.9rem;
}
.topbar nav a:hover, .topbar nav a.active { color: #fff; text-decoration: underline; }
.user-badge { color: #9fb3cc; margin-left: 1rem; font-size: 0.85rem; }

.content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 1.25rem 4rem;
}

.page-head h1 { margin-bottom: 0.15rem; }
.muted { color: var(--color-muted); font-size: 0.9rem; }

.sub-card {
    border-top: 1px solid var(--color-border);
    padding-top: 1rem;
    margin-top: 1rem;
}
.sub-card:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
.sub-card h3 { margin: 0 0 0.5rem; font-size: 0.95rem; }

.card, .card-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.25rem;
    margin: 1.25rem 0;
}
.card h2, .card-form h2 { margin-top: 0; font-size: 1.05rem; }

.form-grid, .form-inline-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.75rem;
    align-items: end;
}
.form-inline-grid { margin-top: 0.75rem; }

label {
    display: flex;
    flex-direction: column;
    font-size: 0.85rem;
    color: var(--color-muted);
    gap: 0.25rem;
}
input, select, textarea {
    font: inherit;
    padding: 0.45rem 0.55rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text);
}
textarea { grid-column: 1 / -1; }

.form-actions { margin-top: 0.75rem; display: flex; gap: 0.5rem; }

button, .button-secondary {
    font: inherit;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    border: 1px solid var(--color-primary);
    background: var(--color-primary);
    color: #fff;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}
button:hover { background: var(--color-primary-dark); }
.button-secondary {
    background: transparent;
    color: var(--color-primary);
}
.link-danger {
    background: none;
    border: none;
    color: var(--color-danger);
    padding: 0;
    text-decoration: underline;
    cursor: pointer;
}
.inline-form { display: inline; }

.search-bar {
    display: flex;
    gap: 0.5rem;
    align-items: end;
    flex-wrap: wrap;
    margin: 1rem 0;
}
.search-bar input[type="text"] { min-width: 260px; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
}
.data-table th, .data-table td {
    text-align: left;
    padding: 0.55rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}
.data-table th { background: #eef1f5; font-weight: 600; }
.row-actions { display: flex; gap: 0.75rem; white-space: nowrap; }

.empty-state { color: var(--color-muted); padding: 1rem 0; }
.error { color: var(--color-danger); font-weight: 600; }
.success { color: var(--color-success); font-weight: 600; }

.login-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.login-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 2rem;
    width: 100%;
    max-width: 320px;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.login-form h1 { font-size: 1.2rem; margin: 0 0 0.5rem; }

.app-footer {
    text-align: center;
    color: var(--color-muted);
    font-size: 0.78rem;
    margin-top: 1.5rem;
    padding: 0.5rem 0 1.5rem;
}