:root {
    --bg: #f4f6f8;
    --surface: #ffffff;
    --border: #dfe3e8;
    --text: #1f2933;
    --muted: #6b7684;
    --primary: #1b3a6b;
    --primary-dark: #142c52;
    --danger: #b32d2e;
    --success: #1e7a45;
    --radius: 6px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    color: var(--text);
    background: var(--bg);
}

a { color: var(--primary); }

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: 56px;
    background: var(--primary);
    color: #fff;
}

.topbar a, .topbar .btn-link { color: #fff; }

.brand { font-weight: 600; text-decoration: none; }

.topbar-right { display: flex; align-items: center; gap: 14px; font-size: 14px; }

.user-role { opacity: .75; }

.shell { display: flex; min-height: calc(100vh - 56px); }

.sidebar {
    width: 210px;
    flex: 0 0 210px;
    background: var(--surface);
    border-right: 1px solid var(--border);
}

.sidebar ul { list-style: none; margin: 0; padding: 12px 0; }

.sidebar a {
    display: block;
    padding: 9px 20px;
    color: var(--text);
    text-decoration: none;
}

.sidebar a:hover { background: var(--bg); }

.sidebar li.active a {
    background: var(--bg);
    border-left: 3px solid var(--primary);
    font-weight: 600;
}

.content { flex: 1; padding: 24px; }

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

.card.narrow { max-width: 480px; }

h1 { font-size: 22px; margin: 0 0 6px; }
h2 { font-size: 17px; margin: 0 0 10px; }

.muted { color: var(--muted); }
.small { font-size: 13px; }

.auth-shell {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.auth-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    width: 100%;
    max-width: 380px;
}

label {
    display: block;
    margin: 14px 0 5px;
    font-size: 14px;
    font-weight: 600;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 9px 11px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font: inherit;
    background: #fff;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(27, 58, 107, .12);
}

.btn {
    display: inline-block;
    padding: 9px 16px;
    border: 0;
    border-radius: var(--radius);
    font: inherit;
    cursor: pointer;
}

.btn-primary { background: var(--primary); color: #fff; margin-top: 18px; }
.btn-primary:hover { background: var(--primary-dark); }

.btn-link { background: none; padding: 0; text-decoration: underline; }

.inline { display: inline; }

.alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-error { background: #fdecec; color: var(--danger); border: 1px solid #f3c4c4; }
.alert-success { background: #e8f6ee; color: var(--success); border: 1px solid #bfe3cd; }
.alert-info { background: #eaf1fb; color: var(--primary); border: 1px solid #c6d8f2; }

.field-error { display: block; margin-top: 5px; font-size: 13px; color: var(--danger); }
.hint { display: block; margin-top: 5px; font-size: 13px; color: var(--muted); }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { font-size: 13px; text-transform: uppercase; color: var(--muted); }

@media (max-width: 760px) {
    .shell { flex-direction: column; }
    .sidebar { width: 100%; flex: none; border-right: 0; border-bottom: 1px solid var(--border); }
    .sidebar ul { display: flex; flex-wrap: wrap; padding: 6px; }
    .sidebar a { padding: 7px 12px; }
    .sidebar li.active a { border-left: 0; border-bottom: 2px solid var(--primary); }
    .content { padding: 16px; }
}