:root {
    --color-primary: #1d4e63;
    --color-primary-dark: #143847;
    --color-bg: #f4f6f7;
    --color-card: #ffffff;
    --color-border: #dde2e4;
    --color-text: #22303a;
    --color-muted: #6b7c85;
    --color-error: #b3261e;
    --color-error-bg: #fceceb;
    --color-success: #1e6f4a;
    --color-success-bg: #e8f5ef;
    --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);
}

/* --- Auth pages --- */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}
.auth-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    width: 100%;
    max-width: 380px;
    text-align: center;
}
.auth-card h1 { margin: 0 0 4px; color: var(--color-primary-dark); font-size: 1.4rem; }
.auth-card .subtitle { color: var(--color-muted); margin-bottom: 20px; }
.auth-card form { text-align: left; }

label { display: block; font-size: 0.85rem; margin: 12px 0 4px; color: var(--color-muted); }
input, textarea, select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.95rem;
}
button {
    margin-top: 20px;
    width: 100%;
    padding: 11px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    cursor: pointer;
}
button:hover { background: var(--color-primary-dark); }

.alert { padding: 10px 14px; border-radius: 6px; font-size: 0.9rem; margin-bottom: 14px; }
.alert-error { background: var(--color-error-bg); color: var(--color-error); }
.alert-success { background: var(--color-success-bg); color: var(--color-success); }

/* --- App shell --- */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--color-primary-dark);
    color: #fff;
    padding: 14px 24px;
}
.topbar-brand { font-weight: 600; }
.topbar-nav { display: flex; align-items: center; gap: 16px; font-size: 0.9rem; }
.topbar-nav a { color: #fff; text-decoration: underline; }
.page-content { max-width: 960px; margin: 0 auto; padding: 32px 24px; }

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 20px;
}
.card {
    display: block;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 18px;
    text-decoration: none;
    color: inherit;
}
.card h2 { margin: 0 0 6px; font-size: 1.05rem; color: var(--color-primary-dark); }
.card p { margin: 0; color: var(--color-muted); font-size: 0.9rem; }
.card-disabled { opacity: 0.6; }

.settings-form .settings-section,
.page-content > .settings-section {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}
.settings-section h2 { margin-top: 0; font-size: 1.05rem; }
.hint { color: var(--color-muted); font-size: 0.85rem; }

.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td {
    text-align: left;
    padding: 8px 10px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}

.btn-link {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
}
.btn-link:hover { text-decoration: underline; }

.btn-small {
    width: auto;
    margin-top: 0;
    padding: 6px 12px;
    font-size: 0.85rem;
    display: inline-block;
}
.btn-danger { background: var(--color-error); }
.btn-danger:hover { background: #8a1e18; }

.filter-form {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 14px;
    margin: 16px 0;
}
.filter-form input, .filter-form select {
    width: auto;
    margin: 0;
}
.filter-form button { width: auto; margin: 0; padding: 9px 16px; }

.inline-form {
    display: inline-block;
    margin: 0 4px 0 0;
}
.inline-form-block {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin-bottom: 14px;
}
.inline-form-block select, .inline-form-block input {
    width: auto;
    margin: 0;
}
.inline-input { width: 100%; margin: 0; }

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--color-text);
    margin: 14px 0 0;
}
.checkbox-label input { width: auto; }

.status-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    background: #e4e9eb;
    color: var(--color-muted);
}
.status-active, .status-admitted, .status-promoted { background: var(--color-success-bg); color: var(--color-success); }
.status-suspended, .status-repeated, .status-on_leave { background: #fff4e0; color: #94620a; }
.status-withdrawn, .status-transferred, .status-graduated, .status-archived, .status-retired { background: #e4e9eb; color: var(--color-muted); }