:root {
    --ink: #1d2733;
    --muted: #65758a;
    --line: #d9e1ea;
    --bg: #f4f7fb;
    --panel: #ffffff;
    --primary: #136f63;
    --primary-dark: #0d5249;
    --danger: #b42318;
    --warn: #9a5b00;
    --accent: #2f6fb2;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--bg);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body::after {
    content: "created by : JR";
    position: fixed;
    right: 14px;
    bottom: 10px;
    z-index: 50;
    color: rgba(29, 39, 51, .38);
    font-size: 12px;
    font-weight: 700;
    pointer-events: none;
}

.auth-page::after {
    content: none;
}

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

a:hover {
    text-decoration: underline;
}

.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    background: linear-gradient(135deg, #eef5f2, #f7f8fb 45%, #eef4fb);
}

.auth-card {
    width: min(420px, 100%);
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 32px;
    box-shadow: 0 18px 60px rgba(29, 39, 51, .1);
}

.auth-brand {
    margin-bottom: 22px;
}

.auth-brand h1 {
    font-size: 32px;
    line-height: 1.1;
    margin: 0 0 8px;
}

.auth-brand p {
    margin: 0;
    color: var(--muted);
    font-weight: 600;
}

.auth-card h1,
.page-head h1,
.result-page h1 {
    margin: 0 0 8px;
}

.auth-card p,
.page-head p {
    color: var(--muted);
    margin: 0 0 20px;
}

.topbar {
    height: 64px;
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 0 28px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand {
    color: var(--ink);
    font-size: 20px;
    font-weight: 800;
}

.topbar nav {
    display: flex;
    gap: 16px;
    flex: 1;
}

.topbar nav a {
    color: #354458;
    font-weight: 600;
}

.userbox {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #354458;
    font-size: 14px;
}

.userbox span {
    color: var(--muted);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 3px 8px;
}

.container {
    width: min(1180px, calc(100% - 32px));
    margin: 28px auto 56px;
}

.page-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 20px;
}

.grid.two {
    display: grid;
    grid-template-columns: minmax(280px, 420px) minmax(0, 1fr);
    gap: 20px;
    align-items: start;
}

.panel,
.exam-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 10px 28px rgba(29, 39, 51, .05);
}

.panel h2,
.exam-card h2,
.question-work h2 {
    margin: 0 0 16px;
    font-size: 20px;
}

.stack {
    display: grid;
    gap: 14px;
}

label {
    display: grid;
    gap: 7px;
    color: #334155;
    font-weight: 650;
}

.auth-card label {
    gap: 8px;
    color: #334155;
    font-size: 16px;
    font-weight: 750;
}

input,
textarea,
select {
    width: 100%;
    border: 1px solid #cbd5e1;
    border-radius: 7px;
    padding: 11px 12px;
    font: inherit;
    color: var(--ink);
    background: #fff;
}

.auth-card input {
    min-height: 46px;
    border-color: #cbd5e1;
    border-radius: 7px;
    background: #fff;
}

.auth-card input:focus {
    outline: 3px solid rgba(19, 111, 99, .16);
    border-color: var(--primary);
    background: #fff;
}

textarea {
    resize: vertical;
}

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

.check input {
    width: auto;
}

.button,
button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 42px;
    border: 1px solid var(--line);
    border-radius: 7px;
    padding: 10px 16px;
    background: #fff;
    color: var(--ink);
    font-weight: 750;
    cursor: pointer;
}

.button.primary,
button.primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.auth-card .button.primary {
    width: 100%;
    min-height: 46px;
    margin-top: 2px;
    font-size: 15px;
    border-radius: 7px;
    box-shadow: none;
}

.button.primary:hover,
button.primary:hover {
    background: var(--primary-dark);
    text-decoration: none;
}

.wide {
    width: 100%;
}

.alert {
    border-radius: 8px;
    padding: 12px 14px;
    margin-bottom: 14px;
    border: 1px solid var(--line);
    background: #fff;
}

.alert.danger {
    color: var(--danger);
    background: #fff3f1;
    border-color: #ffd0ca;
}

.hint,
.muted,
.empty {
    color: var(--muted);
}

.login-credit {
    margin-top: 20px;
    padding-top: 0;
    border-top: 0;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    text-align: center;
}

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

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 12px;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--line);
}

th {
    color: #475569;
    font-size: 13px;
    text-transform: uppercase;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    color: var(--muted);
}

.danger-link {
    color: var(--danger);
}

.question-list {
    display: grid;
    gap: 14px;
}

.student-list {
    display: grid;
    gap: 14px;
}

.student-card {
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 14px;
    background: #fbfdff;
}

.student-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.student-head span {
    display: block;
    color: var(--muted);
    font-size: 13px;
    margin-top: 2px;
}

.compact {
    gap: 10px;
}

.exam-picker {
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
}

.exam-picker legend {
    padding: 0 6px;
    color: #334155;
    font-weight: 750;
}

.exam-picker.small {
    padding: 12px;
    background: #fff;
}

.exam-picker .check {
    align-items: flex-start;
    font-size: 14px;
}

.exam-picker small {
    display: block;
    color: var(--muted);
    font-weight: 500;
    margin-top: 2px;
}

.question-card {
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 14px;
    background: #fbfdff;
}

.question-title {
    font-weight: 750;
}

.exam-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
}

.exam-card p {
    color: var(--muted);
    min-height: 42px;
}

.exam-card dl {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 18px 0;
}

.exam-card dt {
    color: var(--muted);
    font-size: 13px;
}

.exam-card dd {
    margin: 2px 0 0;
    font-weight: 750;
}

.badge {
    display: inline-flex;
    border-radius: 999px;
    padding: 8px 12px;
    color: var(--accent);
    background: #eaf3ff;
    font-weight: 750;
}

.badge.warn {
    color: var(--warn);
    background: #fff4da;
}

.badge.danger {
    color: var(--danger);
    background: #fff3f1;
}

.exam-shell {
    max-width: 900px;
    margin: 0 auto;
}

.exam-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
}

.exam-head h1 {
    margin: 0 0 6px;
}

.exam-head p {
    margin: 0;
    color: var(--muted);
}

.timer {
    min-width: 128px;
    text-align: center;
    border-radius: 8px;
    padding: 14px 16px;
    background: #12212f;
    color: #fff;
    font-size: 24px;
    font-weight: 850;
}

.timer.danger {
    background: var(--danger);
}

.progressbar {
    height: 10px;
    overflow: hidden;
    margin: -4px 0 18px;
    border-radius: 999px;
    background: #dbe5ee;
}

.progressbar span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: var(--primary);
}

.question-work h2 {
    line-height: 1.45;
}

.choice {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-top: 10px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fbfdff;
    cursor: pointer;
}

.choice input {
    width: auto;
    margin-top: 3px;
}

.choice:has(input:checked) {
    border-color: var(--primary);
    background: #effaf7;
}

.result-page {
    max-width: 560px;
    margin: 56px auto;
    text-align: center;
}

.score {
    margin: 20px auto;
    width: 170px;
    height: 170px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: #fff;
    background: var(--primary);
    font-size: 42px;
    font-weight: 900;
}

.filter {
    min-width: 240px;
}

@media (max-width: 760px) {
    .auth-page {
        padding: 16px;
    }

    .auth-card {
        padding: 28px 22px;
    }

    .topbar {
        height: auto;
        flex-wrap: wrap;
        padding: 14px 16px;
    }

    .topbar nav {
        order: 3;
        width: 100%;
    }

    .userbox {
        margin-left: auto;
    }

    .page-head,
    .exam-head {
        display: grid;
    }

    .grid.two {
        grid-template-columns: 1fr;
    }

    .exam-card dl {
        grid-template-columns: 1fr;
    }

    .timer {
        width: 100%;
    }
}