:root {
  --ink: #231916;
  --ink-2: #5a504c;
  --ink-3: #8a807b;
  --paper: #f7f5ef;
  --card: #ffffff;
  --line: #e4dfd5;
  --line-strong: #231916;

  --yellow: #f9cd07;
  --coral: #d75336;
  --blue: #29a7e1;
  --pink: #f1abca;
  --lime: #bed500;
  --lilac: #c2b1d6;
  --sky: #a3d4f3;

  --yellow-soft: #fff6c7;
  --coral-soft: #fbe3dc;
  --blue-soft: #dcf1fb;
  --pink-soft: #fde9f2;
  --lime-soft: #f1f6c9;
  --lilac-soft: #efe9f6;
  --sky-soft: #e8f4fc;
  --stone: #8a807b;
  --stone-soft: #efebe3;

  /* Boxes are square with a 2px ink border, like the emails; only buttons, chips and pills are round. */
  --radius: 0;
  --radius-sm: 0;
  --shadow: 0 1px 0 var(--line-strong);
  --font: 'Lexend', system-ui, -apple-system, 'Segoe UI', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
}
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[hidden] { display: none !important; }

/* The striped bar echoes the coloured letters of the logo. */
.stripe {
  height: 6px;
  background: linear-gradient(90deg,
    var(--yellow) 0 16.66%, var(--coral) 16.66% 33.33%, var(--blue) 33.33% 50%,
    var(--pink) 50% 66.66%, var(--lime) 66.66% 83.33%, var(--lilac) 83.33%);
}

/* ---------- Buttons & inputs ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 2px solid var(--ink); background: var(--card); border-radius: 999px;
  padding: 9px 18px; font-weight: 600; font-size: 14px; text-decoration: none; line-height: 1.2;
  transition: transform .08s ease, background .15s ease;
}
.btn:hover { background: var(--yellow-soft); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: #3b2f2b; }
.btn-primary:disabled { background: var(--ink-3); border-color: var(--ink-3); cursor: default; }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-ghost:hover { background: rgba(35,25,22,.06); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-danger { border-color: var(--coral); color: var(--coral); }
.btn-danger:hover { background: var(--coral-soft); }

.input {
  width: 100%; border: 2px solid var(--line); background: var(--card); border-radius: var(--radius-sm);
  padding: 11px 14px; font-size: 15px; transition: border-color .15s ease;
}
.input:focus { outline: none; border-color: var(--ink); }
label.field { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }

/* ---------- Header ---------- */
.topbar { background: var(--card); border-bottom: 2px solid var(--ink); position: sticky; top: 0; z-index: 20; }
.topbar-inner {
  max-width: 1200px; margin: 0 auto; padding: 10px 24px;
  display: flex; align-items: center; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; flex-shrink: 0; }
.brand img { height: 38px; width: auto; display: block; }
.brand-label { font-weight: 600; font-size: 14px; color: var(--ink-2); border-left: 2px solid var(--line); padding-left: 12px; white-space: nowrap; }
.search { flex: 1; max-width: 460px; margin-left: auto; position: relative; }
.search input { padding-left: 40px; border-radius: 999px; background: var(--paper); border-color: transparent; }
.search input:focus { background: var(--card); border-color: var(--ink); }
.search svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--ink-3); pointer-events: none; }
.user-menu { position: relative; flex-shrink: 0; }
.avatar {
  width: 38px; height: 38px; border-radius: 50%; border: 2px solid var(--ink); background: var(--yellow);
  font-weight: 700; display: grid; place-items: center; padding: 0;
}
.menu {
  position: absolute; right: 0; top: calc(100% + 8px); background: var(--card); border: 2px solid var(--ink);
  border-radius: var(--radius); min-width: 240px; padding: 8px; box-shadow: 4px 4px 0 var(--ink);
}
.menu-head { padding: 8px 10px 10px; border-bottom: 1px solid var(--line); margin-bottom: 6px; }
.menu-head strong { display: block; font-size: 14px; }
.menu-head span { font-size: 12px; color: var(--ink-3); word-break: break-all; }
.menu a, .menu button {
  display: block; width: 100%; text-align: left; padding: 8px 10px; border-radius: var(--radius);
  background: none; border: 0; text-decoration: none; font-size: 14px;
}
.menu a:hover, .menu button:hover { background: var(--paper); }

/* ---------- Layout ---------- */
.wrap { max-width: 1200px; margin: 0 auto; padding: 28px 24px 64px; }
.page-title { font-size: 28px; font-weight: 700; margin: 0 0 4px; letter-spacing: -.01em; }
.page-sub { color: var(--ink-2); margin: 0 0 24px; }

/* ---------- Grade tabs ---------- */
.grades { display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px; margin-bottom: 16px; }
.grade-tab {
  border: 2px solid var(--ink); background: var(--card); border-radius: var(--radius);
  padding: 12px 10px 10px; text-align: left; position: relative; overflow: hidden;
  transition: transform .1s ease, box-shadow .1s ease;
}
.grade-tab::before { content: ''; position: absolute; left: 0; right: 0; top: 0; height: 6px; background: var(--c); }
.grade-tab small { display: block; font-size: 11px; font-weight: 600; color: var(--ink-3); text-transform: uppercase; letter-spacing: .06em; margin-top: 4px; }
.grade-tab b { display: block; font-size: 22px; line-height: 1.1; }
.grade-tab .tab-label { font-size: 15px; font-weight: 700; line-height: 1.25; display: block; margin-top: 6px; }
.grade-tab:hover { transform: translateY(-2px); box-shadow: 0 4px 0 var(--ink); }
.grade-tab[aria-selected="true"] { background: var(--c-soft); box-shadow: 0 4px 0 var(--ink); transform: translateY(-2px); }

/* ---------- Module strip ---------- */
.modules {
  display: flex; gap: 6px; padding: 6px; background: var(--card); border: 2px solid var(--ink);
  border-radius: var(--radius); margin-bottom: 28px; overflow-x: auto; scrollbar-width: none;
}
.modules::-webkit-scrollbar { display: none; }
.modules-label { font-size: 12px; font-weight: 600; color: var(--ink-3); padding: 0 8px 0 12px; align-self: center; white-space: nowrap; }
.module-btn {
  flex: 1 0 auto; min-width: 42px; height: 40px; border-radius: 999px; border: 0; background: transparent;
  font-weight: 600; font-size: 15px; padding: 0 10px;
}
.module-btn:hover { background: var(--paper); }
.module-btn[aria-selected="true"] { background: var(--ink); color: #fff; }

/* ---------- Toolbar ---------- */
.toolbar { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 18px; flex-wrap: wrap; }
.toolbar h2 { font-size: 24px; margin: 0; letter-spacing: -.01em; }
.toolbar h2 span { color: var(--ink-3); font-weight: 500; }
.filters { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  border: 2px solid var(--line); background: var(--card); border-radius: 999px; padding: 6px 14px;
  font-size: 13px; font-weight: 600;
}
.chip:hover { border-color: var(--ink-3); }
.chip[aria-pressed="true"] { border-color: var(--ink); background: var(--ink); color: #fff; }

/* ---------- Subject cards ---------- */
.subjects { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.subject { background: var(--card); border: 2px solid var(--ink); border-radius: var(--radius); overflow: hidden; }
.subject.wide { grid-column: 1 / -1; }
.subject-head {
  display: flex; align-items: center; gap: 12px; padding: 14px 18px; background: var(--c-soft);
  border-bottom: 2px solid var(--ink);
}
.subject-icon { width: 34px; height: 34px; border-radius: var(--radius); background: var(--c); border: 2px solid var(--ink); display: grid; place-items: center; flex-shrink: 0; }
.subject-icon svg { width: 18px; height: 18px; }
.subject-head h3 { margin: 0; font-size: 17px; }
.subject-head .count { margin-left: auto; font-size: 12px; font-weight: 600; color: var(--ink-2); }
.doc-list { list-style: none; margin: 0; padding: 6px 0; }
.subject.wide .doc-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 18px; padding: 6px 0; }
.doc {
  display: flex; align-items: center; gap: 12px; padding: 9px 18px; min-height: 52px;
}
.doc + .doc { border-top: 1px solid var(--line); }
.subject.wide .doc + .doc { border-top: 0; }
.doc:hover { background: #fcfbf7; }
.doc-icon { width: 30px; height: 36px; flex-shrink: 0; border-radius: 4px 9px 4px 4px; border: 1.5px solid var(--ink); background: var(--card); position: relative; display: grid; place-items: end center; padding-bottom: 3px; font-size: 8px; font-weight: 700; letter-spacing: .03em; }
.doc-icon.key { background: var(--coral-soft); }
.doc-main { flex: 1; min-width: 0; }
.doc-title { font-weight: 600; font-size: 14px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.doc-file { font-size: 12px; color: var(--ink-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tag { font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 999px; border: 1.5px solid currentColor; line-height: 1.3; }
.tag-key { color: var(--coral); }
.doc-actions { display: flex; gap: 6px; flex-shrink: 0; }
.fmt {
  display: inline-flex; align-items: center; gap: 5px; height: 32px; padding: 0 11px; border-radius: 999px;
  border: 1.5px solid var(--ink); background: var(--card); text-decoration: none; font-size: 12px; font-weight: 700;
}
.fmt:hover { background: var(--yellow); }
.fmt svg { width: 14px; height: 14px; }
.fmt.icon-only { width: 32px; padding: 0; justify-content: center; }

/* ---------- Search results ---------- */
.results { background: var(--card); border: 2px solid var(--ink); border-radius: var(--radius); overflow: hidden; }
.results .doc { padding: 10px 18px; }
.crumb { display: inline-flex; gap: 6px; font-size: 12px; color: var(--ink-2); flex-wrap: wrap; }
.crumb b { font-weight: 600; padding: 1px 8px; border-radius: 999px; background: var(--c-soft, var(--paper)); }
.empty { text-align: center; padding: 56px 20px; color: var(--ink-2); }
.empty strong { display: block; font-size: 18px; color: var(--ink); margin-bottom: 4px; }

.notice { background: var(--yellow-soft); border: 2px solid var(--ink); border-radius: var(--radius); padding: 14px 18px; margin-bottom: 20px; font-size: 14px; }
.footer { text-align: center; color: var(--ink-3); font-size: 12px; padding: 24px; }

.skeleton { height: 300px; border-radius: var(--radius); background: linear-gradient(90deg, #eee9df 0, #f5f2ec 50%, #eee9df 100%); background-size: 200% 100%; animation: shimmer 1.2s infinite linear; }
@keyframes shimmer { to { background-position: -200% 0; } }

/* ---------- Login ---------- */
.login { min-height: 100vh; display: grid; grid-template-columns: 1.1fr 1fr; }
.login-art { background: var(--ink); color: #fff; padding: 48px; display: flex; flex-direction: column; justify-content: space-between; position: relative; overflow: hidden; }
.login-art h1 { font-size: clamp(30px, 3.4vw, 46px); line-height: 1.12; margin: 0 0 16px; letter-spacing: -.02em; max-width: 520px; position: relative; }
.login-art p { color: #d9d2cd; max-width: 440px; margin: 0; position: relative; }
.login-art .eyebrow { font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--yellow); margin-bottom: 18px; position: relative; }
.blocks { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; position: relative; max-width: 520px; }
.blocks span { aspect-ratio: 1; border-radius: 12px; }
.blocks span:nth-child(1) { background: var(--yellow); }
.blocks span:nth-child(2) { background: var(--coral); clip-path: polygon(50% 0, 100% 100%, 0 100%); border-radius: 0; }
.blocks span:nth-child(3) { background: var(--blue); border-radius: 50% 50% 12px 12px; }
.blocks span:nth-child(4) { background: var(--pink); }
.blocks span:nth-child(5) { background: var(--lime); border-radius: 12px 50% 50% 12px; }
.blocks span:nth-child(6) { background: var(--lilac); border-radius: 50%; }
.login-panel { display: flex; align-items: center; justify-content: center; padding: 40px 24px; background: var(--paper); }
.login-card { width: 100%; max-width: 400px; }
.login-card .logo { height: 64px; width: auto; display: block; margin-bottom: 32px; }
.login-card h2 { font-size: 24px; margin: 0 0 6px; }
.login-card .lead { color: var(--ink-2); margin: 0 0 24px; font-size: 14px; }
.login-card form { display: grid; gap: 14px; }
.login-card .btn { width: 100%; padding: 13px; font-size: 15px; }
.field-row { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.field-row .link-btn { margin-bottom: 6px; }
.pw-wrap { position: relative; }
.pw-wrap .input { padding-right: 68px; }
.pw-toggle {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%); border: 0; background: var(--paper);
  border-radius: 999px; padding: 5px 10px; font-size: 12px; font-weight: 600; color: var(--ink-2);
}
.pw-toggle:hover { background: var(--line); }
dialog.modal {
  border: 2px solid var(--ink); border-radius: var(--radius); padding: 24px; width: min(420px, calc(100vw - 32px));
  box-shadow: 6px 6px 0 var(--ink); color: var(--ink); background: var(--card);
}
dialog.modal::backdrop { background: rgba(35, 25, 22, .45); }
dialog.modal h2 { margin: 0 0 4px; font-size: 20px; }
dialog.modal form { display: grid; gap: 14px; margin-top: 16px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }
.msg { font-size: 14px; border-radius: var(--radius-sm); padding: 10px 14px; }
.msg.error { background: var(--coral-soft); color: #9b2f17; }
.msg.info { background: var(--blue-soft); color: #145b7d; }
.link-btn { background: none; border: 0; padding: 0; text-decoration: underline; font-size: 13px; color: var(--ink-2); }
.login-help { margin-top: 28px; font-size: 13px; color: var(--ink-3); }
.sent-to { font-weight: 600; color: var(--ink); word-break: break-all; }

/* ---------- Admin ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 24px; }
.stat { background: var(--card); border: 2px solid var(--ink); border-radius: var(--radius); padding: 16px 18px; position: relative; overflow: hidden; }
.stat::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 6px; background: var(--c); }
.stat small { font-size: 12px; color: var(--ink-2); font-weight: 600; }
.stat b { display: block; font-size: 28px; line-height: 1.2; font-variant-numeric: tabular-nums; }
.tabs { display: flex; gap: 6px; margin-bottom: 18px; border-bottom: 2px solid var(--ink); }
.tab { border: 2px solid transparent; border-bottom: 0; background: none; padding: 10px 18px; font-weight: 600; border-radius: var(--radius); margin-bottom: -2px; }
.tab[aria-selected="true"] { border-color: var(--ink); background: var(--card); border-bottom: 2px solid var(--card); }
.panel { background: var(--card); border: 2px solid var(--ink); border-radius: var(--radius); padding: 20px; margin-bottom: 18px; }
.panel h3 { margin: 0 0 4px; font-size: 17px; }
.panel .hint { color: var(--ink-2); font-size: 13px; margin: 0 0 14px; }
.form-row { display: grid; grid-template-columns: 1.4fr 1fr 1fr auto; gap: 10px; align-items: end; }
textarea.input { min-height: 120px; font-family: ui-monospace, 'Cascadia Mono', Consolas, monospace; font-size: 13px; }
.table-wrap { overflow-x: auto; }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th { text-align: left; font-size: 12px; color: var(--ink-2); font-weight: 600; padding: 10px 12px; border-bottom: 2px solid var(--ink); white-space: nowrap; }
table.data td { padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.data tr.blocked td { color: var(--ink-3); }
table.data .muted { color: var(--ink-3); font-size: 12px; }
.pill { display: inline-block; font-size: 11px; font-weight: 700; padding: 2px 9px; border-radius: 999px; }
.pill.ok { background: var(--lime-soft); color: #5b6600; }
.pill.off { background: var(--coral-soft); color: #9b2f17; }
.pill.wait { background: var(--yellow-soft); color: #7a6300; }
.check { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; margin-top: 12px; cursor: pointer; }
.check input { width: 16px; height: 16px; accent-color: var(--ink); }
.pill.admin { background: var(--lilac-soft); color: #5a3f86; }
.row-actions { display: flex; gap: 6px; justify-content: flex-end; white-space: nowrap; }
.panel-head { display: flex; gap: 12px; align-items: center; justify-content: space-between; margin-bottom: 14px; flex-wrap: wrap; }
.panel-head > div { flex: 1; justify-content: flex-end; }
.panel-head .input { max-width: 280px; }
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--ink); color: #fff;
  padding: 10px 18px; border-radius: 999px; font-size: 14px; z-index: 50; box-shadow: 0 6px 20px rgba(0,0,0,.2);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .grade-tab .tab-label { font-size: 13px; }
  .subjects { grid-template-columns: 1fr; }
  .subject.wide .doc-list { grid-template-columns: 1fr; }
  .subject.wide .doc + .doc { border-top: 1px solid var(--line); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .login { grid-template-columns: 1fr; }
  .login-art { padding: 32px 24px; gap: 28px; }
  .blocks { max-width: 300px; gap: 8px; }
  .form-row { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .topbar-inner { flex-wrap: wrap; padding: 10px 16px; gap: 10px; }
  .brand-label { display: none; }
  .search { order: 3; flex-basis: 100%; max-width: none; }
  .user-menu { margin-left: auto; }
  .wrap { padding: 20px 16px 48px; }
  .grades { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .grade-tab[data-grade="resources"] { grid-column: 1 / -1; }
  .grade-tab[data-grade="resources"] .tab-label { display: inline; margin-left: 6px; }
  .grade-tab[data-grade="resources"] small { display: inline; }
  .grade-tab { padding: 10px 8px 8px; }
  .grade-tab b { font-size: 19px; }
  .page-title { font-size: 22px; }
  .toolbar h2 { font-size: 20px; }
  .doc { padding: 10px 14px; gap: 10px; }
  .doc-file { display: none; }
  .fmt .fmt-label { display: none; }
  .fmt { width: 34px; padding: 0; justify-content: center; }
  .form-row { grid-template-columns: 1fr; }
  .login-art h1 { font-size: 26px; }
  .login-art .blocks { display: none; }
}