:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --ink: #17233b;
  --muted: #5b6577;
  --line: #dce1e8;
  --line-strong: #c3cad5;
  --accent: #1f6b52;
  --accent-ink: #ffffff;
  --accent-soft: #e5f1ec;
  --amber: #9a5f0c;
  --amber-soft: #fbf1e1;
  --red: #b3261e;
  --red-soft: #fbe9e7;
  --focus: #2f6fdb;
  --radius: 8px;
  --font: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #11161f; --surface: #182030; --ink: #e6ebf2; --muted: #9aa5b6; --line: #2a3446; --line-strong: #3a4659;
    --accent: #4fb38c; --accent-ink: #0d1a14; --accent-soft: #19362b; --amber: #e0a646; --amber-soft: #3a2c14;
    --red: #f07167; --red-soft: #3d1f1d; --focus: #7aa7ff; color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink); font: 15px/1.55 var(--font);
  font-variant-numeric: tabular-nums; -webkit-font-smoothing: antialiased;
  padding-top: env(safe-area-inset-top, 0px); padding-bottom: env(safe-area-inset-bottom, 0px);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
h1 { font-size: 1.5rem; line-height: 1.25; margin: 0 0 4px; font-weight: 700; letter-spacing: -0.01em; }
h2 { font-size: 1.1rem; margin: 0 0 12px; font-weight: 650; }
h3 { font-size: 1rem; margin: 0 0 8px; font-weight: 600; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
.small { font-size: 0.86rem; }
.num { font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }

/* ----- Khung ứng dụng ----- */
.app { display: grid; grid-template-columns: 232px 1fr; min-height: 100vh; }
.side {
  background: var(--surface); border-right: 1px solid var(--line); padding: 20px 12px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.brand { font-weight: 700; padding: 0 10px 16px; line-height: 1.3; }
.brand small { display: block; font-weight: 400; color: var(--muted); font-size: 0.82rem; }
.nav a {
  display: flex; justify-content: space-between; align-items: center; padding: 8px 10px; border-radius: 6px;
  color: var(--ink); font-weight: 500;
}
.nav a:hover { background: var(--bg); text-decoration: none; }
.nav a.on { background: var(--accent-soft); color: var(--accent); }
.nav .sep { height: 1px; background: var(--line); margin: 10px 6px; }
.side .who { margin-top: 18px; padding: 12px 10px 0; border-top: 1px solid var(--line); font-size: 0.86rem; color: var(--muted); }
.main { padding: 28px 32px 64px; min-width: 0; }
.wrap { max-width: 1120px; }
.topbar { display: none; }

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .side { position: fixed; inset: 0 30% 0 0; z-index: 30; transform: translateX(-100%); transition: transform .2s; height: 100%; padding-top: calc(20px + env(safe-area-inset-top, 0px)); }
  .side.open { transform: none; box-shadow: 0 0 0 100vmax rgba(10, 15, 25, .35); }
  .topbar {
    display: flex; align-items: center; gap: 12px; position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
    background: var(--surface); border-bottom: 1px solid var(--line); padding: 10px 16px;
  }
  .main { padding: 18px 16px 64px; }
}
@media (prefers-reduced-motion: reduce) { .side { transition: none; } }

.head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 12px; margin-bottom: 20px; }
.head .actions { display: flex; flex-wrap: wrap; gap: 8px; }

/* ----- Khối & bảng ----- */
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 18px; }
.panel > h2:first-child { margin-top: 0; }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.panel-head h2 { margin: 0; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.tablewrap { overflow-x: auto; margin: 0 -4px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; color: var(--muted); font-size: 0.84rem; border-bottom-color: var(--line-strong); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td .sub { display: block; color: var(--muted); font-size: 0.84rem; }
.empty { color: var(--muted); padding: 14px 0; }

/* ----- Nút & biểu mẫu ----- */
button, .btn {
  font: inherit; font-weight: 550; border-radius: 6px; padding: 8px 14px; cursor: pointer;
  border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); display: inline-flex; align-items: center; gap: 6px;
}
button:hover, .btn:hover { border-color: var(--ink); text-decoration: none; }
button.primary, .btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.primary:hover { filter: brightness(1.08); }
button.danger { color: var(--red); border-color: var(--red); }
button.link { border: 0; background: none; padding: 2px 4px; color: var(--accent); font-weight: 500; }
button.small, .btn.small { padding: 4px 10px; font-size: 0.86rem; }
button:disabled { opacity: .5; cursor: not-allowed; }
.row-actions { display: flex; gap: 4px; flex-wrap: wrap; }

label { display: block; font-weight: 550; font-size: 0.9rem; margin-bottom: 4px; }
input, select, textarea {
  font: inherit; color: var(--ink); background: var(--surface); width: 100%;
  border: 1px solid var(--line-strong); border-radius: 6px; padding: 8px 10px;
}
textarea { min-height: 72px; resize: vertical; }
input[type="checkbox"], input[type="radio"] { width: auto; accent-color: var(--accent); }
.field { margin-bottom: 14px; }
.field .hint { color: var(--muted); font-size: 0.84rem; margin-top: 4px; }
.fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0 16px; }
.checks { display: flex; flex-wrap: wrap; gap: 8px; }
.checks label {
  display: inline-flex; align-items: center; gap: 8px; font-weight: 500; margin: 0;
  border: 1px solid var(--line-strong); border-radius: 6px; padding: 7px 12px; cursor: pointer;
}
.checks label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.search { display: flex; gap: 8px; margin-bottom: 14px; }
.search input { max-width: 360px; }

/* ----- Nhãn trạng thái ----- */
.chip { display: inline-block; font-size: 0.8rem; font-weight: 600; padding: 1px 8px; border-radius: 999px; background: var(--bg); color: var(--muted); border: 1px solid var(--line); white-space: nowrap; }
.chip.green { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.chip.amber { background: var(--amber-soft); color: var(--amber); border-color: transparent; }
.chip.red { background: var(--red-soft); color: var(--red); border-color: transparent; }
.chip.ink { background: var(--ink); color: var(--surface); border-color: transparent; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 14px; }
.tabs button { border: 0; border-bottom: 2px solid transparent; border-radius: 0; background: none; padding: 8px 12px; color: var(--muted); }
.tabs button.on { color: var(--ink); border-bottom-color: var(--accent); }

/* ----- Việc hôm nay: kiểu dòng sổ cái ----- */
.ledger { display: grid; gap: 14px; }
.ledger-row {
  display: grid; grid-template-columns: 76px 1fr; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.ledger-count {
  font-size: 2rem; font-weight: 700; line-height: 1; padding: 18px 14px; text-align: right;
  border-right: 3px solid var(--line); color: var(--muted);
}
.ledger-row.has.tone-red .ledger-count { color: var(--red); border-right-color: var(--red); }
.ledger-row.has.tone-amber .ledger-count { color: var(--amber); border-right-color: var(--amber); }
.ledger-row.has.tone-normal .ledger-count { color: var(--accent); border-right-color: var(--accent); }
.ledger-body { padding: 16px 18px; min-width: 0; }
.ledger-body h3 { margin: 0 0 12px; }
.ledger-row:not(.has) .ledger-count { font-size: 1.3rem; padding: 12px 14px; }
.ledger-row:not(.has) .ledger-body { padding: 12px 18px; }
.ledger-row:not(.has) h3 { color: var(--muted); font-weight: 500; margin: 0; }

/* Mỗi việc là một ô nền màu, xếp 2 cột */
.ledger-items { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.ledger-items li {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 12px 14px; border-radius: 6px; background: var(--accent-soft); border-left: 3px solid var(--accent);
}
.tone-amber .ledger-items li { background: var(--amber-soft); border-left-color: var(--amber); }
.tone-red .ledger-items li { background: var(--red-soft); border-left-color: var(--red); }
.ledger-items li.amber { background: var(--amber-soft); border-left-color: var(--amber); }
.ledger-items li.red { background: var(--red-soft); border-left-color: var(--red); }
.ledger-items li > div { min-width: 0; }
.ledger-items .t { font-weight: 600; color: var(--ink); display: block; }
.ledger-items .s { color: var(--muted); font-size: 0.88rem; margin-top: 2px; }
.ledger-items li.red .s { color: var(--red); }
.ledger-items li.amber .s { color: var(--amber); }
.ledger-items li button { flex: none; background: var(--surface); }
@media (max-width: 760px) { .ledger-items { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .ledger-row { grid-template-columns: 56px 1fr; } .ledger-count { font-size: 1.5rem; padding: 16px 10px; } }

.stat { display: flex; flex-wrap: wrap; gap: 28px; }
.stat div b { display: block; font-size: 1.4rem; }
.stat div span { color: var(--muted); font-size: 0.86rem; }

/* ----- Hộp thoại & thông báo ----- */
dialog { border: 1px solid var(--line); border-radius: 10px; padding: 0; width: min(560px, calc(100vw - 24px)); color: var(--ink); background: var(--surface); }
dialog::backdrop { background: rgba(10, 15, 25, .45); }
dialog .dlg { padding: 20px 22px; max-height: 80vh; overflow-y: auto; }
dialog .dlg-actions { display: flex; justify-content: flex-end; gap: 8px; padding: 12px 22px; border-top: 1px solid var(--line); }
.toast {
  position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); z-index: 60;
  background: var(--ink); color: var(--surface); padding: 10px 16px; border-radius: 8px; max-width: calc(100vw - 32px); font-weight: 500;
}
.toast.err { background: var(--red); color: #fff; }
.msgbox { background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; margin: 6px 0 12px; white-space: pre-wrap; font-size: 0.9rem; }
.notice { border-left: 3px solid var(--amber); background: var(--amber-soft); padding: 10px 14px; border-radius: 4px; margin-bottom: 14px; }
.notice.red { border-left-color: var(--red); background: var(--red-soft); }
.notice.green { border-left-color: var(--accent); background: var(--accent-soft); }

/* ----- Đăng nhập ----- */
.center { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.card { width: min(400px, 100%); background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 28px; }

/* ----- Chiếu QR ----- */
.qrstage { display: grid; place-items: center; text-align: center; gap: 12px; padding: 12px 0; }
.qrbox { background: #fff; padding: 18px; border-radius: 12px; border: 1px solid var(--line); }
.qrbox img, .qrbox canvas { display: block; width: min(64vh, 80vw) !important; height: auto !important; image-rendering: pixelated; }
.qrcount { font-size: 2.4rem; font-weight: 700; color: var(--accent); }

/* ----- Điểm danh: nút chọn trạng thái ----- */
.seg { display: inline-flex; border: 1px solid var(--line-strong); border-radius: 6px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; padding: 5px 10px; font-size: 0.86rem; border-left: 1px solid var(--line-strong); }
.seg button:first-child { border-left: 0; }
.seg button.on.co_mat { background: var(--accent); color: var(--accent-ink); }
.seg button.on.vang { background: var(--red); color: #fff; }
.seg button.on.vang_phep { background: var(--amber); color: #fff; }

/* ----- Trang in (phiếu, báo cáo) ----- */
.paper { background: #fff; color: #17233b; max-width: 760px; margin: 0 auto; padding: 36px 40px; border: 1px solid var(--line); }
.paper h1 { font-size: 1.35rem; text-align: center; margin: 18px 0 4px; }
.paper .meta { text-align: center; color: #5b6577; margin-bottom: 20px; }
.paper table td, .paper table th { border-bottom: 1px solid #dce1e8; color: #17233b; }
.paper .co { display: flex; justify-content: space-between; gap: 16px; border-bottom: 2px solid #17233b; padding-bottom: 10px; }
.paper .sign { display: grid; grid-template-columns: 1fr 1fr; text-align: center; margin-top: 36px; gap: 24px; }
.paper .sign div { min-height: 110px; }
.paper img.proof { max-width: 260px; max-height: 260px; border: 1px solid #dce1e8; margin-top: 8px; }
.print-bar { max-width: 760px; margin: 0 auto 14px; display: flex; gap: 8px; justify-content: space-between; }
@media print {
  @page { size: A4; margin: 12mm; }
  body { background: #fff; padding: 0; }
  .side, .topbar, .print-bar, .toast { display: none !important; }
  .app { display: block; }
  .main { padding: 0; }
  .paper { border: 0; padding: 0; max-width: none; }
}

/* ----- Trang học viên ----- */
.pub { max-width: 640px; margin: 0 auto; padding: 24px 16px 64px; }
.pub header { margin-bottom: 18px; }
.pub .company { color: var(--muted); font-weight: 500; }
.progress { height: 8px; background: var(--bg); border-radius: 99px; overflow: hidden; border: 1px solid var(--line); }
.progress i { display: block; height: 100%; background: var(--accent); }
.big-ok { font-size: 3rem; line-height: 1; color: var(--accent); }
.big-bad { font-size: 3rem; line-height: 1; color: var(--red); }
.vietqr { max-width: 280px; width: 100%; border-radius: 8px; border: 1px solid var(--line); background: #fff; }