:root {
    --brand: #0f766e;
    --brand-dark: #115e59;
    --brand-soft: #ccfbf1;
    --bg: #f4f6f8;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --line: #e5e7eb;
    --danger: #b91c1c;
    --danger-soft: #fee2e2;
    --ok: #15803d;
    --ok-soft: #dcfce7;
    --warn: #a16207;
    --warn-soft: #fef9c3;
    --radius: 10px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--brand); }
h1 { font-size: 1.5rem; margin: 0 0 .75rem; }
h2 { font-size: 1.15rem; margin: 1.25rem 0 .5rem; }
h3 { font-size: 1rem; margin: 1rem 0 .4rem; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 16px; }
main.wrap { padding-top: 20px; padding-bottom: 40px; min-height: 70vh; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.right { text-align: right; }
.center { text-align: center; }
.nowrap { white-space: nowrap; }

/* top bar */
.topbar { background: var(--brand); color: #fff; }
.topbar-inner { display: flex; align-items: center; gap: 16px; min-height: 56px; flex-wrap: wrap; }
.brand { color: #fff; text-decoration: none; font-weight: 700; font-size: 1.05rem; margin-right: auto; }
.brand-mark { margin-right: 4px; }
.mainnav { display: flex; gap: 2px; flex-wrap: wrap; }
.mainnav a { color: #e6fffb; text-decoration: none; padding: 6px 10px; border-radius: 6px; }
.mainnav a:hover, .mainnav a.active { background: rgba(255, 255, 255, .16); color: #fff; }
.mainnav a.muted { color: #b2f5ea; }
.nav-user { font-weight: 600; }
.nav-toggle { display: none; background: none; border: 0; color: #fff; font-size: 1.4rem; cursor: pointer; }
@media (max-width: 860px) {
    .nav-toggle { display: block; }
    .mainnav { display: none; width: 100%; flex-direction: column; padding-bottom: 10px; }
    .nav-open .mainnav { display: flex; }
}
.footer { color: var(--muted); font-size: .85rem; padding: 20px 0; border-top: 1px solid var(--line); }

/* blocks */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; }
.card > h2:first-child, .card > h3:first-child { margin-top: 0; }
.page-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.page-head h1 { margin: 0; margin-right: auto; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; text-decoration: none; color: inherit; }
.stat b { display: block; font-size: 1.5rem; }
.stat span { color: var(--muted); font-size: .85rem; }
a.stat:hover { border-color: var(--brand); }

.alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; border: 1px solid transparent; }
.alert-success { background: var(--ok-soft); color: var(--ok); border-color: #bbf7d0; }
.alert-error { background: var(--danger-soft); color: var(--danger); border-color: #fecaca; }
.alert-info { background: var(--brand-soft); color: var(--brand-dark); border-color: #99f6e4; }
.alert-warn { background: var(--warn-soft); color: var(--warn); border-color: #fde68a; }

.badge { display: inline-block; padding: 1px 8px; border-radius: 99px; font-size: .78rem; font-weight: 600; background: #eef2f7; color: #374151; }
.badge-ok { background: var(--ok-soft); color: var(--ok); }
.badge-bad { background: var(--danger-soft); color: var(--danger); }
.badge-warn { background: var(--warn-soft); color: var(--warn); }

/* tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; background: var(--card); }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
th { font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); background: #fafafa; }
tr:hover td { background: #fbfdfd; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tfoot td { font-weight: 700; background: #fafafa; }
.table-tight td, .table-tight th { padding: 5px 8px; }

/* forms */
label { display: block; font-weight: 600; font-size: .88rem; margin-bottom: 4px; }
input[type=text], input[type=email], input[type=password], input[type=date], input[type=number], input[type=tel], input[type=search], select, textarea {
    width: 100%; padding: 8px 10px; border: 1px solid #d1d5db; border-radius: 7px; font: inherit; background: #fff; color: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--brand-soft); border-color: var(--brand); }
textarea { min-height: 80px; resize: vertical; }
.field { margin-bottom: 12px; }
.field .hint { font-weight: 400; color: var(--muted); font-size: .8rem; }
.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.inline-form { display: flex; gap: 8px; align-items: flex-end; flex-wrap: wrap; }
.inline-form .field { margin: 0; }
.inline-form select, .inline-form input { width: auto; min-width: 140px; }
.check { display: flex; gap: 6px; align-items: center; font-weight: 400; }
.check input { width: auto; }
input.score { width: 72px; text-align: right; padding: 5px 6px; }
input.remark { min-width: 180px; padding: 5px 8px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

.btn, button.btn {
    display: inline-block; background: var(--brand); color: #fff; border: 1px solid var(--brand); padding: 8px 14px;
    border-radius: 7px; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; line-height: 1.3;
}
.btn:hover { background: var(--brand-dark); }
.btn-sm { padding: 4px 10px; font-size: .85rem; }
.btn-light { background: #fff; color: var(--brand); }
.btn-light:hover { background: var(--brand-soft); }
.btn-danger { background: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: #991b1b; }
.link-btn { background: none; border: 0; color: var(--brand); cursor: pointer; padding: 0; font: inherit; text-decoration: underline; }
.link-btn.danger { color: var(--danger); }

/* attendance radio pills */
.att { display: flex; gap: 4px; }
.att label { margin: 0; font-weight: 600; font-size: .8rem; }
.att input { position: absolute; opacity: 0; }
.att span { display: inline-block; width: 30px; text-align: center; padding: 4px 0; border: 1px solid #d1d5db; border-radius: 6px; cursor: pointer; color: var(--muted); }
.att input:checked + span.s-P { background: var(--ok-soft); color: var(--ok); border-color: var(--ok); }
.att input:checked + span.s-A { background: var(--danger-soft); color: var(--danger); border-color: var(--danger); }
.att input:checked + span.s-L { background: var(--warn-soft); color: var(--warn); border-color: var(--warn); }
.att input:checked + span.s-E { background: #e0e7ff; color: #3730a3; border-color: #6366f1; }
.att input:focus-visible + span { outline: 2px solid var(--brand); }

/* login */
.auth-box { max-width: 400px; margin: 40px auto; }
.auth-box h1 { text-align: center; }

/* report card & receipt */
.paper { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; max-width: 860px; margin: 0 auto 24px; }
.paper-head { text-align: center; border-bottom: 2px solid var(--brand); padding-bottom: 10px; margin-bottom: 14px; }
.paper-head h1 { margin: 0; font-size: 1.45rem; text-transform: uppercase; letter-spacing: .03em; }
.paper-head p { margin: 2px 0; color: var(--muted); }
.paper-head .doc-title { color: var(--brand); font-weight: 700; margin-top: 6px; letter-spacing: .08em; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 4px 18px; margin-bottom: 14px; }
.facts div span { color: var(--muted); font-size: .82rem; display: block; }
.paper table th { background: #f0fdfa; color: var(--brand-dark); }
.paper .sign { display: flex; justify-content: space-between; gap: 24px; margin-top: 36px; }
.paper .sign div { flex: 1; border-top: 1px solid #9ca3af; padding-top: 4px; text-align: center; font-size: .85rem; color: var(--muted); }
.page-break { page-break-after: always; break-after: page; }

@media print {
    body { background: #fff; font-size: 12px; }
    .no-print, .topbar, .footer { display: none !important; }
    main.wrap { padding: 0; max-width: none; }
    .paper { border: 0; padding: 0; margin: 0 auto; max-width: none; }
    .card { border: 0; padding: 0; }
    th, td { padding: 4px 6px; }
    a { color: inherit; text-decoration: none; }
}