:root {
    --ink: #1a1916;
    --muted: #5c574f;
    --line: #cfc8bb;
    --paper: #f4efe4;
    --navy: #1c3554;
    --navy-deep: #112338;
    --gold: #8a6a32;
    --bad: #8b1e1e;
    --ok: #1f4d32;
    --white: #fffdf8;
    --font: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
    font-family: var(--font);
    color: var(--ink);
    background: var(--paper);
    line-height: 1.5;
}

a { color: var(--navy); text-decoration: none; }
a:hover { text-decoration: underline; }

.masthead {
    background: var(--navy-deep);
    color: #f4efe4;
}
.masthead-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}
.brand { display: flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.brand-mark {
    width: 44px; height: 44px;
    border: 1px solid #c4a35a;
    display: grid; place-items: center;
    font-weight: 700;
    letter-spacing: 0.1em;
}
.brand-text { display: flex; flex-direction: column; }
.brand-text strong { font-size: 15px; }
.brand-text small { color: #d7c8a0; font-size: 12px; }
.mast-nav { display: flex; gap: 18px; }
.mast-nav a { color: #f4efe4; }

.public-main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 24px 64px;
}
.site-foot {
    text-align: center;
    color: var(--muted);
    font-size: 12px;
    padding: 24px;
}

.auth-card {
    max-width: 440px;
    margin: 24px auto;
    background: var(--white);
    border: 1px solid var(--line);
    padding: 32px;
}
.auth-card h1 { margin: 0 0 8px; font-size: 22px; }
.lead { color: var(--muted); margin-top: 0; }
.hint { font-size: 13px; color: var(--muted); }
code { font-family: Consolas, monospace; background: #eee8d8; padding: 0 4px; }

.stack { display: grid; gap: 14px; }
label { display: grid; gap: 6px; font-size: 14px; }
input, select, textarea, button {
    font: inherit;
    color: inherit;
}
input, select, textarea {
    border: 1px solid #b7b09f;
    background: #fff;
    padding: 8px 10px;
    width: 100%;
}
textarea { resize: vertical; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--navy);
    background: #fff;
    color: var(--navy);
    padding: 8px 14px;
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
}
.btn:hover { text-decoration: none; background: #eef3f8; }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-deep); }
.btn-ghost { border-color: transparent; background: transparent; color: var(--navy); }
.btn-danger { border-color: var(--bad); color: var(--bad); }

.alert { padding: 10px 12px; border: 1px solid; margin: 0 0 16px; }
.alert-bad { border-color: #d9a3a3; background: #f8ecec; color: var(--bad); }
.alert-ok { border-color: #a3c4b0; background: #eaf4ee; color: var(--ok); }

.staff-body { display: flex; min-height: 100vh; background: #ece6d8; }
.sidenav {
    width: 220px;
    background: var(--navy-deep);
    color: #f4efe4;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}
.side-brand {
    display: block;
    padding: 22px 18px 18px;
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid #2a4364;
}
.side-brand span { display: block; font-weight: 700; }
.side-brand small { color: #d7c8a0; }
.sidenav nav { padding: 12px 0; flex: 1; }
.sidenav nav a {
    display: block;
    padding: 8px 18px;
    color: #e7dfd0;
    text-decoration: none;
}
.sidenav nav a.is-on,
.sidenav nav a:hover { background: #1c3554; color: #fff; }
.nav-label {
    margin: 18px 18px 6px;
    font-size: 11px;
    letter-spacing: 0.12em;
    color: #c4a35a;
}
.side-user {
    padding: 16px 18px 20px;
    border-top: 1px solid #2a4364;
    font-size: 13px;
}
.side-user a { color: #d7c8a0; display: inline-block; margin-top: 8px; }
.side-user form { margin-top: 8px; }
.btn-ghost-link {
    display: inline;
    padding: 0;
    border: 0;
    background: none;
    color: #d7c8a0;
    cursor: pointer;
    font: inherit;
    text-decoration: underline;
}
.staff-wrap { flex: 1; min-width: 0; }
.staff-top {
    background: var(--white);
    border-bottom: 1px solid var(--line);
    padding: 16px 28px;
}
.staff-top h1 { margin: 0; font-size: 20px; }
.staff-main { padding: 24px 28px 48px; }
.section-title { font-size: 16px; margin: 28px 0 8px; }

.panel, .panel-form, .panel-head {
    background: var(--white);
    border: 1px solid var(--line);
}
.panel, .panel-form { padding: 20px; }
.panel-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    margin-bottom: 16px;
}
.panel-head h1 { margin: 0; font-size: 20px; }
.panel-head p { margin: 4px 0 0; color: var(--muted); }

.muted { color: var(--muted); }
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
    margin-top: 16px;
}
.class-card {
    background: var(--white);
    border: 1px solid var(--line);
    padding: 16px;
    display: grid;
    gap: 8px;
    color: inherit;
}
.class-card:hover { border-color: var(--navy); }
.class-card-main {
    display: grid;
    gap: 6px;
    color: inherit;
    text-decoration: none;
}
.class-card-main:hover { text-decoration: none; }
.class-card strong { font-size: 20px; }
.class-card-switch { margin: 0; }
.class-card-switch .btn { width: 100%; }
.tag {
    display: inline-block;
    font-size: 12px;
    color: var(--gold);
    border: 1px solid #d8c394;
    padding: 1px 6px;
    width: max-content;
}

.tabs { display: flex; gap: 0; margin-bottom: 16px; }
.tabs a {
    padding: 8px 16px;
    border: 1px solid var(--line);
    background: #efe9dc;
    margin-right: -1px;
    color: inherit;
}
.tabs a.is-on { background: var(--white); font-weight: 700; }

.data { width: 100%; border-collapse: collapse; background: var(--white); font-size: 14px; }
.data th, .data td { border: 1px solid var(--line); padding: 6px 8px; text-align: left; }
.data th { background: #efe9dc; font-weight: 600; }
.data input { border: 0; padding: 4px; background: transparent; }

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
}
.row-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-bar { display: flex; gap: 8px; margin: 16px 0; max-width: 640px; }
.check-row { display: grid; gap: 6px; margin: 8px 0 12px; }
.check { display: flex; align-items: center; gap: 8px; }
.check input { width: auto; }
.exam-picker { background: var(--white); border: 1px solid var(--line); padding: 16px; margin-bottom: 16px; }
.exam-picker select { max-width: 520px; }
.table-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}
.table-actions form { margin: 0; }
.table-actions .btn { padding: 4px 10px; }
.danger-form {
    margin-top: 24px;
    padding: 16px;
    background: var(--white);
    border: 1px solid #d9a3a3;
    max-width: 480px;
}
fieldset { border: 1px solid var(--line); padding: 12px; }
fieldset fieldset { margin-top: 10px; }
legend { padding: 0 6px; }

.sheet-stage {
    overflow: auto;
    background: #fff;
    padding: 16px;
    border: 1px solid var(--line);
}

@media print {
    .masthead, .site-foot, .sidenav, .staff-top, .exam-picker, .tabs, .alert, .panel-head, .btn, .print-bar, .danger-form, .muted {
        display: none !important;
    }
    .staff-body { display: block; background: #fff; }
    .staff-wrap, .staff-main, .public-main, .panel { padding: 0; margin: 0; border: 0; background: #fff; max-width: none; }
    .sheet-stage { border: 0; padding: 0; overflow: visible; }
}

@media (max-width: 800px) {
    .staff-body { display: block; }
    .sidenav { width: auto; }
    .masthead-inner { flex-direction: column; align-items: flex-start; }
}