:root {
  --bg: #f4f2ee;
  --paper: #ffffff;
  --paper-2: #faf9f6;
  --ink: #17202f;
  --ink-2: #4a5466;
  --ink-3: #7b8494;
  --line: #e2ded6;
  --line-2: #ece9e2;
  --brand: #1d3557;
  --brand-ink: #ffffff;
  --accent: #b5452f;
  --ok: #2f7d5b;
  --ok-bg: #e6f2ec;
  --warn: #a8670b;
  --warn-bg: #fbf0dc;
  --bad: #b3261e;
  --bad-bg: #fbe7e5;
  --info-bg: #e9eef6;
  --focus: #3b6fd8;
  --shadow: 0 1px 2px rgba(23,32,47,.06), 0 4px 16px rgba(23,32,47,.05);
  --radius: 10px;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12161d; --paper: #1a1f28; --paper-2: #161b23; --ink: #e8eaee; --ink-2: #b3b9c4; --ink-3: #868d9a;
    --line: #2c3340; --line-2: #242a35; --brand: #0f1c30; --accent: #e07a5f; --ok: #5fbf92; --ok-bg: #173126;
    --warn: #e5a84a; --warn-bg: #33270f; --bad: #f08a80; --bad-bg: #3a1a18; --info-bg: #1c2638; --focus: #7aa2ff;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #12161d; --paper: #1a1f28; --paper-2: #161b23; --ink: #e8eaee; --ink-2: #b3b9c4; --ink-3: #868d9a;
  --line: #2c3340; --line-2: #242a35; --brand: #0f1c30; --accent: #e07a5f; --ok: #5fbf92; --ok-bg: #173126;
  --warn: #e5a84a; --warn-bg: #33270f; --bad: #f08a80; --bad-bg: #3a1a18; --info-bg: #1c2638; --focus: #7aa2ff;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25); color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font: 15px/1.5 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--focus); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .4em; letter-spacing: -.01em; }
h1 { font-size: 1.55rem; } h2 { font-size: 1.2rem; } h3 { font-size: 1.02rem; } h4 { font-size: .92rem; }
.mono { font-family: var(--mono); font-size: .82em; }
.muted { color: var(--ink-3); }
.small { font-size: .84rem; }
.hidden { display: none !important; }

/* Top bar */
.topbar { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--brand); color: var(--brand-ink); display: flex; align-items: center; gap: 14px; padding: 10px 20px; }
.brandmark { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 600; letter-spacing: .01em; }
.brandmark:hover { text-decoration: none; }
.brandmark .glyph { width: 30px; height: 30px; border-radius: 7px; background: rgba(255,255,255,.12); display: grid; place-items: center; font-family: var(--mono); font-size: 12px; }
.brandmark small { display: block; font-weight: 400; opacity: .7; font-size: 11px; letter-spacing: .04em; text-transform: uppercase; }
.topbar .spacer { flex: 1; }
.topbar .who { text-align: right; font-size: 13px; line-height: 1.25; }
.topbar .who b { display: block; font-weight: 600; }
.topbar .who span { opacity: .75; }
.topbar .tbtn { background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.18); color: #fff; padding: 6px 11px; border-radius: 7px; cursor: pointer; font-size: 13px; }
.topbar .tbtn:hover { background: rgba(255,255,255,.18); }
.demo-ribbon { background: var(--accent); color: #fff; font-size: 12px; text-align: center; padding: 4px 10px; letter-spacing: .02em; }

.wrap { max-width: 1180px; margin: 0 auto; padding-block: 22px 80px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 30; background: var(--brand); }
table.t td, .mono { font-variant-numeric: tabular-nums; }
h1, h2 { text-wrap: balance; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.card > .hd { padding: 14px 18px; border-bottom: 1px solid var(--line-2); display: flex; align-items: center; gap: 10px; }
.card > .hd h2, .card > .hd h3 { margin: 0; }
.card > .bd { padding: 16px 18px; }
.grid { display: grid; gap: 16px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.stack > * + * { margin-top: 16px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--paper); padding: 7px 13px; border-radius: 8px; cursor: pointer; font-weight: 500; font-size: 14px; color: var(--ink); }
.btn:hover { border-color: var(--ink-3); text-decoration: none; }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { filter: brightness(1.15); }
.btn.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.danger { color: var(--bad); }
.btn.sm { padding: 4px 9px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, .seg button:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* Chips */
.chip { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 999px; background: var(--line-2); color: var(--ink-2); white-space: nowrap; }
.chip.ok { background: var(--ok-bg); color: var(--ok); }
.chip.warn { background: var(--warn-bg); color: var(--warn); }
.chip.bad { background: var(--bad-bg); color: var(--bad); }
.chip.info { background: var(--info-bg); color: var(--focus); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line); display: inline-block; flex: none; }
.dot.ok { background: var(--ok); } .dot.part { background: var(--warn); } .dot.none { background: var(--line); border: 1px solid var(--ink-3); }

/* Progress */
.bar { height: 8px; background: var(--line-2); border-radius: 99px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--ok); border-radius: 99px; transition: width .3s; }
.ring { --p: 0; width: 56px; height: 56px; border-radius: 50%; background: conic-gradient(var(--ok) calc(var(--p) * 1%), var(--line-2) 0); display: grid; place-items: center; flex: none; }
.ring::before { content: attr(data-label); width: 44px; height: 44px; border-radius: 50%; background: var(--paper); display: grid; place-items: center; font-size: 13px; font-weight: 600; font-family: var(--mono); }
.rotbar { display: flex; gap: 3px; }
.rotbar span { flex: 1; height: 6px; border-radius: 3px; background: var(--line-2); position: relative; overflow: hidden; }
.rotbar span i { position: absolute; inset: 0; background: var(--ok); }

/* Stats */
.stat { padding: 16px 18px; }
.stat b { display: block; font-size: 1.8rem; font-family: var(--mono); font-weight: 500; letter-spacing: -.02em; }
.stat span { color: var(--ink-3); font-size: 13px; }

/* Tables */
table.t { width: 100%; border-collapse: collapse; font-size: 14px; }
table.t th { text-align: left; font-weight: 600; color: var(--ink-3); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; padding: 8px 10px; border-bottom: 1px solid var(--line); background: var(--paper-2); }
table.t td { padding: 9px 10px; border-bottom: 1px solid var(--line-2); vertical-align: top; }
table.t tr.link { cursor: pointer; }
table.t tr.link:hover td { background: var(--paper-2); }
.scrollx { overflow-x: auto; }

/* Login */
.login { max-width: 980px; margin: 40px auto; padding: 0 20px; }
.login .hero { margin-bottom: 26px; }
.login .hero h1 { font-size: 2rem; }
.login .hero p { color: var(--ink-2); max-width: 640px; }
.persona { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 9px; background: var(--paper); cursor: pointer; text-align: left; width: 100%; }
.persona:hover { border-color: var(--brand); }
.avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--info-bg); color: var(--brand); display: grid; place-items: center; font-weight: 600; font-size: 13px; flex: none; }
.role-student .avatar { background: #e7f0fb; color: #2059a6; }
.role-mentor .avatar { background: #eaf4ec; color: #2f7d5b; }
.role-ocs .avatar { background: #fbf0dc; color: #8a5508; }
.role-pdo .avatar { background: #f8e6e1; color: #a03a24; }
.persona small { display: block; color: var(--ink-3); font-size: 12px; }

/* Book layout */
.book { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 20px; align-items: start; }
.side { position: sticky; top: 70px; max-height: calc(100vh - 90px); overflow: auto; }
.side .tabhd { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); padding: 12px 14px 4px; }
.side a.nav { display: flex; align-items: center; gap: 8px; padding: 6px 14px; color: var(--ink-2); font-size: 13.5px; border-left: 3px solid transparent; }
.side a.nav:hover { background: var(--paper-2); text-decoration: none; }
.side a.nav.on { border-left-color: var(--accent); background: var(--paper-2); color: var(--ink); font-weight: 600; }
.side a.nav .lbl { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.side .sub { padding-left: 14px; }
.crumbs { font-size: 13px; color: var(--ink-3); margin-bottom: 8px; }
.crumbs a { color: var(--ink-3); }
.studenthead { display: flex; gap: 16px; align-items: center; padding: 16px 18px; }
.studenthead .meta { flex: 1; min-width: 0; }
.studenthead .meta h1 { margin: 0; }
.kv { display: flex; flex-wrap: wrap; gap: 4px 16px; color: var(--ink-2); font-size: 13px; }
.kv b { font-weight: 600; color: var(--ink); }

/* Overview */
.tabcard .hd .num { font-family: var(--mono); font-size: 12px; background: var(--brand); color: #fff; border-radius: 6px; padding: 2px 7px; }
.formrow { display: flex; align-items: center; gap: 10px; padding: 9px 18px; border-top: 1px solid var(--line-2); color: var(--ink); }
.formrow:hover { background: var(--paper-2); text-decoration: none; }
.formrow .t { flex: 1; min-width: 0; }
.rotgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; padding: 12px 18px 16px; border-top: 1px solid var(--line-2); }
.rotcell { border: 1px solid var(--line); border-radius: 8px; padding: 10px; background: var(--paper-2); color: var(--ink); }
.rotcell:hover { border-color: var(--ink-3); text-decoration: none; }
.rotcell b { display: block; margin-bottom: 6px; }

/* Forms */
.form-intro { background: var(--info-bg); border-radius: 8px; padding: 10px 14px; color: var(--ink-2); font-size: 14px; }
.ref { border-left: 3px solid var(--line); padding: 4px 14px; color: var(--ink-2); font-size: 14px; }
.field { margin-bottom: 14px; }
.field > label { display: block; font-weight: 600; font-size: 13.5px; margin-bottom: 5px; }
.field .who { font-weight: 500; font-size: 11px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .04em; margin-left: 6px; }
.inp, select.inp, textarea.inp { width: 100%; border: 1px solid var(--line); background: var(--paper); border-radius: 7px; padding: 8px 10px; }
textarea.inp { min-height: 76px; resize: vertical; }
.inp:disabled, textarea.inp:disabled, select.inp:disabled { background: var(--paper-2); color: var(--ink-2); border-style: dashed; }
.stampline { font-size: 11.5px; color: var(--ink-3); margin-top: 4px; font-family: var(--mono); }
.group-hd { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-3); margin: 20px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--line-2); }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--paper); }
.seg button { border: 0; background: transparent; padding: 5px 0; width: 34px; cursor: pointer; font-family: var(--mono); font-size: 13px; color: var(--ink-2); }
.seg button + button { border-left: 1px solid var(--line-2); }
.seg button.on { background: var(--brand); color: #fff; }
.seg.wide button { width: auto; padding: 5px 14px; font-family: var(--sans); }
.seg.dis { opacity: .75; }
.seg.dis button { cursor: default; }
.check { display: flex; gap: 10px; align-items: flex-start; }
.check input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--brand); flex: none; }

/* Rating table */
.rate-table td.item { width: 100%; }
.rate-table td.r { white-space: nowrap; text-align: center; }
.rate-table tr.sec td { background: var(--paper-2); font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-3); }
.rate-table tr.gap td.item { box-shadow: inset 3px 0 0 var(--warn); }
.avg { font-family: var(--mono); font-size: 1.3rem; }

/* Spec */
.spec-item { display: grid; grid-template-columns: minmax(0, 1fr) repeat(4, 112px); gap: 8px; align-items: center; padding: 9px 0; border-top: 1px solid var(--line-2); font-size: 14px; }
.spec-head { font-size: 11px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .04em; font-weight: 600; border-top: 0; }
.tick { border: 1px dashed var(--line); border-radius: 7px; padding: 4px 6px; font-size: 11.5px; text-align: center; background: transparent; cursor: pointer; color: var(--ink-3); min-height: 34px; line-height: 1.2; }
.tick.on { border-style: solid; border-color: transparent; background: var(--ok-bg); color: var(--ok); font-family: var(--mono); }
.tick:disabled { cursor: default; }
.tick:not(:disabled):not(.on):hover { border-color: var(--brand); color: var(--brand); }
details.spec { border: 1px solid var(--line); border-radius: 9px; background: var(--paper); margin-bottom: 10px; }
details.spec > summary { list-style: none; cursor: pointer; padding: 12px 16px; display: flex; align-items: center; gap: 10px; font-weight: 600; }
details.spec > summary::-webkit-details-marker { display: none; }
details.spec > .bd { padding: 0 16px 8px; }

/* Signatures */
.sigs { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.sigbox { border: 1px solid var(--line); border-radius: 9px; padding: 12px; background: var(--paper-2); min-height: 112px; display: flex; flex-direction: column; gap: 6px; }
.sigbox.done { background: var(--ok-bg); border-color: transparent; }
.sigbox .slot { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-3); }
.sigbox img { max-height: 54px; max-width: 100%; align-self: flex-start; background: #fff; border-radius: 4px; padding: 2px 6px; }
.sigbox .nm { font-weight: 600; }
.sigbox .when { font-family: var(--mono); font-size: 11.5px; color: var(--ink-2); }

/* Modal */
.modal-back { position: fixed; inset: 0; background: rgba(10,14,22,.55); z-index: 50; display: grid; place-items: center; padding: 16px; }
.modal { background: var(--paper); border-radius: 12px; width: min(560px, 100%); box-shadow: 0 20px 60px rgba(0,0,0,.3); }
.modal .hd { padding: 16px 18px 6px; } .modal .bd { padding: 6px 18px 12px; } .modal .ft { padding: 12px 18px 16px; display: flex; gap: 8px; justify-content: flex-end; }
.pad { width: 100%; height: 180px; border: 1px dashed var(--ink-3); border-radius: 8px; background: #fff; touch-action: none; cursor: crosshair; display: block; }

.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--paper); padding: 9px 16px; border-radius: 8px; font-size: 14px; z-index: 60; box-shadow: var(--shadow); max-width: 90vw; }
.toast.err { background: var(--bad); color: #fff; }
.savestate { font-size: 12px; color: var(--ink-3); font-family: var(--mono); }
.lockbar { background: var(--warn-bg); color: var(--warn); border-radius: 8px; padding: 8px 12px; font-size: 13.5px; }
.empty { padding: 26px; text-align: center; color: var(--ink-3); }
.todo a { display: flex; gap: 10px; align-items: center; padding: 9px 18px; border-top: 1px solid var(--line-2); color: var(--ink); }
.todo a:hover { background: var(--paper-2); text-decoration: none; }
.todo a .t { flex: 1; min-width: 0; }
.mobile-nav { display: none; }

@media (max-width: 860px) {
  .book { grid-template-columns: 1fr; }
  .side { display: none; }
  .mobile-nav { display: block; margin-bottom: 12px; }
  .g2, .g3, .g4 { grid-template-columns: 1fr 1fr; }
  .spec-item { grid-template-columns: 1fr 1fr; }
  .spec-item > .lbl { grid-column: 1 / -1; }
  .spec-head { display: none; }
  .topbar .who span { display: none; }
}
@media (max-width: 560px) {
  .wrap { padding-block: 14px 70px; }
  .topbar { padding: 8px 14px; gap: 8px; }
  .brandmark small { display: none; }
  .g2, .g3, .g4 { grid-template-columns: 1fr; }
  .g4.stats { grid-template-columns: 1fr 1fr; }
  h1 { font-size: 1.3rem; }
  .rate-table td.item { min-width: 180px; }
}

/* Print */
.printbook { background: #fff; color: #111; }
.printbook .pform { break-inside: avoid-page; border: 1px solid #ccc; border-radius: 6px; padding: 12px 14px; margin-bottom: 12px; }
.printbook .ptab { break-before: page; }
.printbook table.t td, .printbook table.t th { padding: 4px 6px; font-size: 12px; }
@media print {
  .topbar, .demo-ribbon, .noprint { display: none !important; }
  body { background: #fff; }
  .wrap { max-width: none; padding: 0; }
  .card { box-shadow: none; }
}