:root {
    --bg: #f4f8ff;
    --card: #ffffff;
    --card-2: #f9fbff;
    --text: #122033;
    --muted: #5b6b80;
    --line: #d9e4f2;
    --primary: #1f5eff;
    --primary-dark: #1246cc;
    --primary-soft: #eaf1ff;
    --success: #15803d;
    --success-soft: #eaf8ef;
    --danger: #c62828;
    --danger-soft: #fdecec;
    --warning: #b26a00;
    --warning-soft: #fff4df;
    --shadow: 0 12px 28px rgba(18, 32, 51, 0.08);
    --radius: 16px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: Inter, Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, #eef4ff 0, #f7faff 36%, #f4f8ff 100%);
}

body {
    min-height: 100vh;
}

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

a:hover {
    text-decoration: underline;
}

.page {
    max-width: 1120px;
    margin: 0 auto;
    padding: 32px 20px 56px;
}

.page-narrow {
    max-width: 760px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding: 18px 22px;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    backdrop-filter: blur(6px);
    box-shadow: var(--shadow);
}

.brand {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.brand-title {
    margin: 0;
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.brand-subtitle {
    color: var(--muted);
    font-size: 14px;
}

.actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.grid {
    display: grid;
    gap: 20px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 22px;
}

.card-soft {
    background: var(--card-2);
}

.card-title {
    margin: 0 0 12px;
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.card-subtitle {
    margin: 0 0 18px;
    color: var(--muted);
    line-height: 1.5;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    background: var(--primary-soft);
    color: var(--primary-dark);
}

.badge-success {
    background: var(--success-soft);
    color: var(--success);
}

.badge-danger {
    background: var(--danger-soft);
    color: var(--danger);
}

.badge-warning {
    background: var(--warning-soft);
    color: var(--warning);
}

.meta-list {
    display: grid;
    gap: 10px;
    margin: 18px 0 0;
}

.meta-row {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
}

.meta-row:last-child {
    border-bottom: none;
}

.meta-label {
    color: var(--muted);
}

.meta-value {
    font-weight: 700;
    text-align: right;
}

.btn,
button,
input[type="submit"] {
    appearance: none;
    border: none;
    outline: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 16px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 14px;
    background: var(--primary);
    color: #fff;
    box-shadow: 0 8px 16px rgba(31, 94, 255, 0.24);
    transition: transform .12s ease, background .12s ease, box-shadow .12s ease;
}

.btn:hover,
button:hover,
input[type="submit"]:hover {
    background: var(--primary-dark);
    text-decoration: none;
    transform: translateY(-1px);
}

.btn-secondary {
    background: #e8f0ff;
    color: var(--primary-dark);
    box-shadow: none;
}

.btn-secondary:hover {
    background: #dbe8ff;
}

.btn-danger {
    background: #dc2626;
    box-shadow: 0 8px 16px rgba(220, 38, 38, 0.18);
}

.btn-danger:hover {
    background: #b91c1c;
}

.btn-success {
    background: #15803d;
    box-shadow: 0 8px 16px rgba(21, 128, 61, 0.18);
}

.btn-success:hover {
    background: #166534;
}

form {
    margin: 0;
}

.form-grid {
    display: grid;
    gap: 16px;
}

.form-row {
    display: grid;
    gap: 8px;
}

label {
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
}

input[type="text"],
input[type="password"],
input[type="number"],
select,
textarea {
    width: 100%;
    border: 1px solid #cfdced;
    border-radius: 12px;
    background: #fff;
    color: var(--text);
    padding: 12px 14px;
    font-size: 15px;
    transition: border-color .12s ease, box-shadow .12s ease;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(31, 94, 255, 0.12);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.alert {
    padding: 14px 16px;
    border-radius: 12px;
    border: 1px solid transparent;
    font-weight: 600;
    margin-bottom: 18px;
}

.alert-success {
    background: var(--success-soft);
    color: var(--success);
    border-color: #bde5c8;
}

.alert-error {
    background: var(--danger-soft);
    color: var(--danger);
    border-color: #f1bcbc;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

th {
    text-align: left;
    background: #edf4ff;
    color: #16335f;
    font-size: 14px;
    padding: 14px 12px;
    border-bottom: 1px solid var(--line);
}

td {
    padding: 14px 12px;
    border-bottom: 1px solid #edf1f7;
    vertical-align: top;
}

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

.inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.test-card {
    display: grid;
    gap: 14px;
}

.option {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 14px;
    background: #f8fbff;
    border: 1px solid #dce8f8;
    border-radius: 14px;
}

.option input {
    margin-top: 4px;
}

.question-block {
    display: grid;
    gap: 14px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #fff;
    box-shadow: var(--shadow);
}

.question-title {
    margin: 0;
    font-size: 22px;
    font-weight: 800;
}

.section-chip {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    background: #edf4ff;
    color: #1c4fa6;
    font-size: 12px;
    font-weight: 800;
    width: fit-content;
    text-transform: uppercase;
    letter-spacing: .04em;
}

.login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 460px;
    background: rgba(255,255,255,.92);
    border: 1px solid var(--line);
    border-radius: 24px;
    box-shadow: 0 18px 50px rgba(18, 32, 51, 0.12);
    padding: 30px;
}

.login-logo {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    background: linear-gradient(135deg, #1f5eff, #4d8cff);
    color: #fff;
    display: grid;
    place-items: center;
    font-weight: 900;
    font-size: 22px;
    margin-bottom: 16px;
}

.stat-hero {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
}

.stat-box {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 18px;
    box-shadow: var(--shadow);
}

.stat-box .k {
    color: var(--muted);
    font-size: 13px;
    margin-bottom: 8px;
}

.stat-box .v {
    font-size: 28px;
    font-weight: 900;
    color: #16335f;
}

hr {
    border: 0;
    border-top: 1px solid var(--line);
    margin: 22px 0;
}

@media (max-width: 720px) {
    .page {
        padding: 20px 14px 40px;
    }

    .topbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .meta-row {
        flex-direction: column;
    }

    .meta-value {
        text-align: left;
    }
}