:root {
  --bg: #eef1f8;
  --bg-2: #e7ebf6;
  --panel: #ffffff;
  --ink: #161c2d;
  --muted: #6b7488;
  --faint: #99a1b3;
  --line: #e3e7f1;
  --line-soft: #eef1f7;
  --brand: #4361ee;
  --brand-2: #6d49f0;
  --brand-ink: #2f43c9;
  --brand-soft: #eef1fe;
  --teacher: #2f9e44;
  --teacher-soft: #ebfbee;
  --student: #1c7ed6;
  --student-soft: #e7f5ff;
  --warn: #f08c00;
  --warn-soft: #fff4e2;
  --danger: #e03131;
  --danger-soft: #ffe9e9;
  --ok-soft: #e6f8ec;
  --grad: linear-gradient(120deg, #4361ee, #6d49f0 55%, #8b5cf6);
  --shadow-sm: 0 1px 2px rgba(20, 30, 60, .06), 0 2px 8px rgba(20, 30, 60, .05);
  --shadow: 0 2px 6px rgba(20, 30, 60, .07), 0 12px 32px rgba(20, 30, 60, .08);
  --shadow-lg: 0 18px 50px rgba(31, 41, 92, .18);
  --radius: 16px;
  --radius-sm: 10px;
  /* locked spacing scale (8px base) — planner uses only these */
  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px; --s5: 24px; --s6: 32px; --s7: 48px;
  /* locked type scale */
  --t-meta: 12px; --t-body: 14px; --t-emph: 16px; --t-title: 20px; --t-page: 28px;
  --empty: #eef1f7;             /* filled neutral for "nothing here" (never white) */
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Inter", -apple-system, "Segoe UI", Roboto, system-ui, sans-serif;
  font-size: 15px; line-height: 1.55; -webkit-font-smoothing: antialiased;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--danger); font-size: 13px; min-height: 18px; margin-top: 6px; font-weight: 500; }
a { color: var(--brand); }

/* ───────── buttons ───────── */
.btn { border: 1px solid var(--line); background: #fff; color: var(--ink);
  padding: 10px 17px; border-radius: 10px; cursor: pointer; font-weight: 600; font-size: 14px;
  transition: .16s ease; display: inline-flex; align-items: center; gap: 7px; white-space: nowrap; }
.btn:hover { border-color: #c4cce0; box-shadow: var(--shadow-sm); }
.btn.primary { background: var(--grad); border: none; color: #fff; box-shadow: 0 6px 16px rgba(67, 97, 238, .32); }
.btn.primary:hover { filter: brightness(1.05); box-shadow: 0 8px 22px rgba(67, 97, 238, .4); }
.btn.primary:disabled { opacity: .6; cursor: not-allowed; filter: grayscale(.2); box-shadow: none; }
.btn.ghost { background: transparent; }
.btn.small { padding: 6px 12px; font-size: 13px; }
.btn.block { width: 100%; justify-content: center; }
.btn.lg { padding: 13px 20px; font-size: 15px; }

/* ───────── login ───────── */
.login-screen { min-height: 100vh; display: grid; place-items: center; padding: 20px;
  background:
    radial-gradient(900px 500px at 12% -10%, #dfe6ff, transparent 60%),
    radial-gradient(900px 600px at 100% 110%, #e9defb, transparent 55%), var(--bg); }
.login-card { background: var(--panel); width: 380px; max-width: 100%; padding: 38px 34px;
  border-radius: 22px; box-shadow: var(--shadow-lg); text-align: center; }
.brand-big { font-size: 30px; font-weight: 800; letter-spacing: -.6px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.login-card > .muted { margin-top: 4px; }
.login-card form { display: grid; gap: 13px; margin-top: 24px; text-align: left; }
.login-card label { font-size: 13px; font-weight: 700; color: var(--muted); display: grid; gap: 6px;
  text-transform: uppercase; letter-spacing: .3px; }
.login-card input { padding: 12px 13px; border: 1.5px solid var(--line); border-radius: 11px;
  font-size: 15px; transition: .15s; }
.login-card input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 4px var(--brand-soft); }
.login-card .btn.primary { margin-top: 4px; padding: 13px; }
.demo-hint { margin-top: 22px; display: flex; gap: 8px; align-items: center; justify-content: center;
  flex-wrap: wrap; font-size: 12px; color: var(--muted); }
.demo-hint > span { width: 100%; margin-bottom: 2px; }
.chip { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 7px 14px;
  cursor: pointer; font-size: 13px; font-weight: 600; transition: .15s; }
.chip:hover { background: var(--brand-soft); border-color: var(--brand); color: var(--brand-ink); }

/* ───────── shell ───────── */
.topbar { height: 62px; background: rgba(255,255,255,.85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 12px;
  padding: 0 22px; position: sticky; top: 0; z-index: 20; }
.brand { font-weight: 800; font-size: 18px; letter-spacing: -.3px; }
.brand-tag { font-size: 11px; font-weight: 700; color: var(--brand-ink); background: var(--brand-soft);
  padding: 3px 9px; border-radius: 999px; text-transform: uppercase; letter-spacing: .4px; }
.spacer { flex: 1; }
.user-chip { display: flex; align-items: center; gap: 11px; }
.user-avatar { width: 34px; height: 34px; border-radius: 50%; background: var(--grad); color: #fff;
  display: grid; place-items: center; font-weight: 800; font-size: 14px; }
.user-meta { display: flex; flex-direction: column; line-height: 1.2; }
.user-meta #user-name { font-weight: 700; font-size: 14px; }
.role-badge { font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: .5px;
  padding: 1px 0; color: var(--muted); }
.role-badge.teacher { color: var(--teacher); }
.role-badge.student { color: var(--student); }

/* active-job pill in the topbar (survives navigation) */
.active-job { border: 1px solid var(--line); background: #fff; border-radius: 999px;
  padding: 6px 14px 6px 10px; cursor: pointer; font-weight: 600; font-size: 13px; color: var(--ink);
  display: inline-flex; align-items: center; gap: 8px; box-shadow: var(--shadow-sm); transition: .15s; }
.active-job:hover { border-color: var(--brand); color: var(--brand-ink); }
.active-job.done { border-color: #b2f2bb; background: var(--ok-soft); color: var(--teacher); }
.active-job.error { border-color: #ffc9c9; background: var(--danger-soft); color: var(--danger); }

.layout { display: grid; grid-template-columns: 244px 1fr; min-height: calc(100vh - 62px); }
.sidebar { background: var(--panel); border-right: 1px solid var(--line); padding: 16px 12px;
  display: flex; flex-direction: column; gap: 4px; position: sticky; top: 62px; height: calc(100vh - 62px); }
.nav-section { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .6px;
  color: var(--faint); padding: 14px 12px 6px; }
.nav-item { display: flex; align-items: center; gap: 12px; padding: 11px 13px; border-radius: 11px;
  cursor: pointer; color: var(--ink); font-weight: 600; font-size: 14px; transition: .14s; }
.nav-item .ico { font-size: 18px; width: 22px; text-align: center; }
.nav-item:hover { background: var(--brand-soft); }
.nav-item.active { background: var(--grad); color: #fff; box-shadow: 0 6px 16px rgba(67,97,238,.3); }
.nav-item.soon { opacity: .6; cursor: default; }
.nav-item.soon:hover { background: transparent; }
.nav-tag { margin-left: auto; font-size: 10px; font-weight: 800; background: #eef0f5; color: var(--muted);
  padding: 2px 7px; border-radius: 999px; text-transform: uppercase; letter-spacing: .3px; }
.nav-spacer { flex: 1; }
.nav-foot { font-size: 11px; color: var(--faint); padding: 10px 13px; border-top: 1px solid var(--line-soft); }

.view { padding: 30px 38px 48px; max-width: 1360px; margin: 0 auto; width: 100%; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px;
  flex-wrap: wrap; margin-bottom: 24px; }
.page-title { font-size: 25px; font-weight: 800; margin: 0 0 4px; letter-spacing: -.4px; }
.page-sub { color: var(--muted); margin: 0; max-width: 70ch; }

/* ───────── dashboard ───────── */
.hero { background: var(--grad); color: #fff; border-radius: 22px; padding: 30px 34px; margin-bottom: 26px;
  position: relative; overflow: hidden; box-shadow: var(--shadow); }
.hero::after { content: ""; position: absolute; right: -60px; top: -60px; width: 260px; height: 260px;
  background: radial-gradient(circle, rgba(255,255,255,.22), transparent 70%); }
.hero h1 { margin: 0 0 6px; font-size: 26px; letter-spacing: -.4px; }
.hero p { margin: 0; opacity: .92; max-width: 60ch; }
.hero .hero-meta { margin-top: 18px; display: flex; gap: 22px; flex-wrap: wrap; font-size: 13px; }
.hero .hero-meta b { display: block; font-size: 20px; font-weight: 800; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.feature-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm); cursor: pointer; transition: .18s; position: relative; overflow: hidden; }
.feature-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--grad);
  opacity: 0; transition: .18s; }
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #d2d9ee; }
.feature-card:hover::before { opacity: 1; }
.feature-card.soon { cursor: default; opacity: .8; }
.feature-card.soon:hover { transform: none; box-shadow: var(--shadow-sm); }
.feature-card.soon:hover::before { opacity: 0; }
.fc-ico { font-size: 30px; width: 56px; height: 56px; border-radius: 14px; background: var(--brand-soft);
  display: grid; place-items: center; }
.feature-card h3 { margin: 14px 0 6px; font-size: 16px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }
.feature-card .fc-go { margin-top: 14px; font-size: 13px; font-weight: 700; color: var(--brand-ink); }
.soon-tag { position: absolute; top: 16px; right: 16px; font-size: 10px; font-weight: 800;
  background: var(--warn-soft); color: var(--warn); padding: 3px 9px; border-radius: 999px;
  text-transform: uppercase; letter-spacing: .3px; }

/* ───────── panels ───────── */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); padding: 22px 24px; }
.panel-title { display: flex; align-items: center; gap: 9px; margin: 0 0 4px; font-size: 16px; font-weight: 800; }
.panel-title .step { width: 24px; height: 24px; border-radius: 7px; background: var(--brand-soft);
  color: var(--brand-ink); font-size: 13px; font-weight: 800; display: grid; place-items: center; }
.panel-note { color: var(--muted); font-size: 13px; margin: 0 0 16px; }
.section-label { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .5px;
  color: var(--faint); margin: 22px 0 10px; display: flex; align-items: center; gap: 8px; }
.section-label::after { content: ""; flex: 1; height: 1px; background: var(--line-soft); }

/* ───────── qpgen layout ───────── */
.qp-layout { display: grid; grid-template-columns: minmax(440px, 1fr) 1.15fr; gap: 24px; align-items: start; }
@media (max-width: 1080px) { .qp-layout { grid-template-columns: 1fr; } }
.result-panel { position: sticky; top: 80px; }
@media (max-width: 1080px) { .result-panel { position: static; } }

/* form fields */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: start; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
@media (max-width: 560px) { .grid2, .grid3 { grid-template-columns: 1fr; } }
.field { display: grid; gap: 6px; margin-bottom: 14px; }
.field > label { font-size: 12px; font-weight: 700; color: var(--muted); text-transform: uppercase;
  letter-spacing: .3px; }
.field select, .field input[type=text], .field input[type=number], .field textarea, .free-input {
  padding: 11px 12px; border: 1.5px solid var(--line); border-radius: 10px; font-size: 14px;
  font-family: inherit; background: #fff; transition: .15s; color: var(--ink); width: 100%; }
.field select { appearance: none; background-image:
  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236b7488' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 13px center; padding-right: 34px; cursor: pointer; }
.field select:focus, .field input:focus, .field textarea:focus, .free-input:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 4px var(--brand-soft); }
.field textarea { resize: vertical; min-height: 64px; }
.hint { font-size: 12px; color: var(--muted); }
.hint.warn { color: var(--warn); font-weight: 600; }

/* segmented control (test type / mode) */
.segmented { display: grid; grid-auto-flow: column; gap: 4px; background: var(--bg-2); border-radius: 11px;
  padding: 4px; }
.segmented.wrap { grid-auto-flow: row; grid-template-columns: 1fr 1fr; }
.seg { border: none; background: transparent; padding: 9px 8px; border-radius: 8px; cursor: pointer;
  font-weight: 600; font-size: 13px; color: var(--muted); transition: .14s; text-align: center; }
.seg:hover { color: var(--ink); }
.seg.active { background: #fff; color: var(--brand-ink); box-shadow: var(--shadow-sm); }

/* marks / duration sliders */
.slider-row { display: grid; gap: 7px; margin-bottom: 14px; }
.slider-row .slider-head { display: flex; justify-content: space-between; align-items: baseline; }
.slider-row label { font-size: 12px; font-weight: 700; color: var(--muted); text-transform: uppercase;
  letter-spacing: .3px; }
.slider-val { font-size: 15px; font-weight: 800; color: var(--brand-ink); }
.slider-val small { font-weight: 600; color: var(--muted); font-size: 11px; }
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 999px;
  background: var(--line); outline: none; cursor: pointer; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%;
  background: #fff; border: 4px solid var(--brand); box-shadow: var(--shadow-sm); cursor: pointer; }
input[type=range]::-moz-range-thumb { width: 16px; height: 16px; border-radius: 50%; background: #fff;
  border: 4px solid var(--brand); cursor: pointer; }
.custom-box { background: var(--brand-soft); border: 1px solid #d7ddfb; border-radius: 12px;
  padding: 14px 16px 4px; margin-bottom: 14px; }

/* chapters */
.chapters-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.chapters-tools { display: flex; gap: 6px; }
.mini-btn { border: 1px solid var(--line); background: #fff; border-radius: 7px; padding: 4px 9px;
  font-size: 12px; font-weight: 700; cursor: pointer; color: var(--muted); }
.mini-btn:hover { border-color: var(--brand); color: var(--brand-ink); }
.chapters { display: grid; gap: 6px; max-height: 280px; overflow: auto; border: 1.5px solid var(--line);
  border-radius: 11px; padding: 8px; background: #fbfcfe; }
.chk { display: flex; align-items: center; gap: 10px; font-size: 14px; padding: 8px 10px; border-radius: 9px;
  cursor: pointer; transition: .12s; border: 1px solid transparent; }
.chk:hover { background: var(--brand-soft); }
.chk input { width: 17px; height: 17px; accent-color: var(--brand); cursor: pointer; }
.chk.checked { background: var(--brand-soft); border-color: #d7ddfb; font-weight: 600; }
.chapters.locked { opacity: .75; }
.full-note { display: flex; align-items: center; gap: 10px; background: var(--ok-soft); border: 1px solid #c3f0cf;
  color: var(--teacher); border-radius: 11px; padding: 12px 14px; font-size: 13px; font-weight: 600; }

/* teacher extras */
.teacher-block { margin-top: 6px; border-radius: 12px; border: 1px dashed #cdd5ea; padding: 4px 16px 2px;
  background: #fafbff; }
.teacher-block .section-label { margin-top: 14px; }
.teacher-block .section-label .pill { background: var(--teacher-soft); color: var(--teacher); font-size: 10px;
  padding: 2px 7px; border-radius: 999px; letter-spacing: .3px; }

/* warning banner */
.warn-banner { background: var(--warn-soft); border: 1px solid #ffe0a8; color: #8a5a00; padding: 12px 16px;
  border-radius: 12px; font-size: 14px; margin-bottom: 20px; line-height: 1.55; display: flex; gap: 10px; }
.warn-banner code { background: #fff; padding: 1px 6px; border-radius: 5px; font-size: 13px; border: 1px solid #ffe0a8; }

/* ───────── result / job ───────── */
.result-empty { text-align: center; padding: 30px 16px; color: var(--muted); }
.result-empty .big { font-size: 46px; }
.result-empty h4 { margin: 10px 0 4px; color: var(--ink); font-size: 15px; }
.console { background: #0c1322; color: #cfe1ff; font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px; border-radius: 11px; padding: 13px 15px; height: 190px; overflow: auto;
  white-space: pre-wrap; line-height: 1.6; border: 1px solid #1b2742; }
.console .ln { display: block; }
.status-pill { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; font-weight: 800;
  padding: 4px 13px; border-radius: 999px; text-transform: capitalize; }
.status-pill.running { background: var(--warn-soft); color: var(--warn); }
.status-pill.queued { background: #eceef4; color: var(--muted); }
.status-pill.done { background: var(--ok-soft); color: var(--teacher); }
.status-pill.error { background: var(--danger-soft); color: var(--danger); }
.spinner { width: 13px; height: 13px; border: 2px solid currentColor; border-right-color: transparent;
  border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.pdf-frame { width: 100%; height: 600px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.result-actions { display: flex; gap: 10px; margin: 14px 0; flex-wrap: wrap; align-items: center; }
.tabs { display: flex; gap: 6px; margin: 14px 0 12px; background: var(--bg-2); padding: 4px; border-radius: 10px;
  width: fit-content; }
.tab { padding: 7px 16px; border-radius: 8px; border: none; background: transparent; cursor: pointer;
  font-weight: 700; font-size: 13px; color: var(--muted); }
.tab.active { background: #fff; color: var(--brand-ink); box-shadow: var(--shadow-sm); }

/* ───────── history (My Papers) ───────── */
.history-list { display: grid; gap: 12px; }
.history-card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px;
  box-shadow: var(--shadow-sm); display: grid; grid-template-columns: 46px 1fr auto; gap: 16px; align-items: center;
  transition: .15s; }
.history-card:hover { border-color: #d2d9ee; box-shadow: var(--shadow); }
.history-ico { width: 46px; height: 46px; border-radius: 12px; background: var(--brand-soft); display: grid;
  place-items: center; font-size: 22px; }
.history-main h4 { margin: 0 0 3px; font-size: 15px; }
.history-meta { font-size: 13px; color: var(--muted); display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.history-meta .dot { color: var(--faint); }
.tagchip { background: var(--bg-2); color: var(--muted); font-size: 11px; font-weight: 700; padding: 2px 8px;
  border-radius: 999px; }
.history-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.history-empty { text-align: center; padding: 60px 20px; color: var(--muted); }
.history-empty .big { font-size: 52px; }

/* grouped versions + richer details */
.group-card { align-items: start; }
.group-card .history-main { display: grid; gap: 7px; }
.group-card h4 { margin: 0; display: flex; align-items: center; gap: 8px; }
.ver-badge { font-size: 10px; font-weight: 800; background: var(--brand-soft); color: var(--brand-ink);
  padding: 1px 7px; border-radius: 999px; }
.hist-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.hist-chapters { font-size: 13px; color: var(--muted); }
.hist-chapters b { color: var(--ink); font-weight: 700; }
.hist-when { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.history-actions { align-self: center; }
.danger-btn { color: var(--danger); border-color: #ffd5d5; }
.danger-btn:hover { background: var(--danger-soft); border-color: var(--danger); }
.versions-toggle { border: none; background: none; color: var(--brand-ink); font-weight: 700; font-size: 13px;
  cursor: pointer; padding: 2px 0; text-align: left; }
.versions-toggle.open { color: var(--ink); }
.versions { display: grid; gap: 6px; margin-top: 4px; border-left: 2px solid var(--line); padding-left: 12px; }
.version-row { display: flex; align-items: center; gap: 10px; font-size: 13px; flex-wrap: wrap; }
.version-row .vr-actions { display: flex; gap: 6px; margin-left: auto; }

/* regenerate-with-comment row in the preview modal */
.modal-regen-row { display: flex; gap: 8px; margin: 4px 0 8px; }
.modal-comment { flex: 1; padding: 9px 11px; border: 1.5px solid var(--line); border-radius: 9px;
  font-size: 13px; font-family: inherit; }
.modal-comment:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.format-hint { display: block; margin: -8px 0 12px; }

/* coming soon */
.cs-wrap { display: grid; place-items: center; padding: 30px; }
.cs-card { text-align: center; max-width: 480px; }
.cs-card .big { font-size: 54px; }

/* ───────── pattern cards ───────── */
.pattern-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 560px) { .pattern-cards { grid-template-columns: 1fr; } }
.pattern-card { text-align: left; border: 1.5px solid var(--line); background: #fff; border-radius: 12px;
  padding: 12px 13px; cursor: pointer; transition: .14s; font: inherit; color: var(--ink); display: grid; gap: 8px; }
.pattern-card:hover { border-color: #c4cce0; box-shadow: var(--shadow-sm); }
.pattern-card.selected { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); background: #fcfdff; }
.pattern-card.custom { border-style: dashed; }
.pc-top { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.pc-name { font-weight: 800; font-size: 14px; }
.pc-marks { font-size: 12px; font-weight: 700; color: var(--brand-ink); white-space: nowrap; }
.pc-bars { display: flex; gap: 2px; height: 9px; }
.pc-bar { border-radius: 3px; min-width: 4px; }
.pc-bar.t-a { background: #748ffc; } .pc-bar.t-b { background: #63e6be; }
.pc-bar.t-c { background: #ffa94d; } .pc-bar.t-d { background: #da77f2; }
.pc-bar.t-flex { flex: 1; background: repeating-linear-gradient(135deg, #d7ddfb, #d7ddfb 5px, #eef1fe 5px, #eef1fe 10px); }
.pc-desc { font-size: 12px; color: var(--muted); line-height: 1.4; }

/* ───────── preview modal (My Papers) ───────── */
.modal-overlay { position: fixed; inset: 0; z-index: 60; background: rgba(20, 26, 48, .55);
  backdrop-filter: blur(3px); display: grid; place-items: center; padding: 24px; animation: fade .15s ease; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.modal-card { background: var(--panel); border-radius: 18px; box-shadow: var(--shadow-lg); width: min(900px, 96vw);
  max-height: 92vh; overflow: auto; padding: 20px 22px; }
.modal-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 6px; }
.modal-head h3 { margin: 0 0 3px; font-size: 17px; }
.modal-meta { font-size: 13px; color: var(--muted); }
.modal-close { border: 1px solid var(--line); background: #fff; border-radius: 9px; width: 34px; height: 34px;
  cursor: pointer; font-size: 15px; color: var(--muted); }
.modal-close:hover { border-color: var(--danger); color: var(--danger); }
.modal-pdf { height: min(70vh, 720px); }

/* ───────── generation analytics (teacher) ───────── */
.timer { font-size: 13px; font-weight: 700; color: var(--warn); margin-left: 4px; }
.analytics { border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin: 14px 0 4px;
  background: linear-gradient(180deg, #fbfcff, #fff); }
.an-title { font-size: 13px; font-weight: 800; color: var(--ink); margin-bottom: 10px; }
.an-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 12px; }
.an-item { text-align: center; background: var(--bg-2); border-radius: 9px; padding: 8px 4px; }
.an-item b { display: block; font-size: 17px; font-weight: 800; color: var(--brand-ink); }
.an-item span { font-size: 11px; color: var(--muted); font-weight: 600; }
.an-split { display: flex; height: 9px; border-radius: 999px; overflow: hidden; background: var(--line); }
.an-split .an-w { background: #748ffc; } .an-split .an-c { background: #ffa94d; }
.an-legend { display: flex; gap: 16px; margin-top: 7px; font-size: 12px; color: var(--muted); }
.an-legend .dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 5px; }
.an-legend .dot-w { background: #748ffc; } .an-legend .dot-c { background: #ffa94d; }

/* utilities */
.row-end { display: flex; justify-content: flex-end; }
.mt0 { margin-top: 0; }
.gen-cta { margin-top: 18px; }

/* ═════════════════════════ student planner ═════════════════════════ */
/* status chip (one meaning per colour, reused everywhere) */
.chip-status { font-size: 11px; font-weight: 800; padding: 3px 10px; border-radius: 999px;
  text-transform: capitalize; display: inline-flex; align-items: center; gap: 5px; letter-spacing: .2px; }
.chip-status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.st-active { background: var(--ok-soft); color: #1f7a34; }
.st-trial { background: var(--warn-soft); color: #8a5a00; }
.st-lead { background: var(--student-soft); color: #14608f; }
.st-inactive { background: #eef0f5; color: var(--muted); }

/* subject-coloured avatar (flat, not gradient) */
.avatar { border-radius: 50%; display: grid; place-items: center; color: #fff; font-weight: 800; flex: none; }
.avatar.maths { background: #3b6fe0; } .avatar.science { background: #2f9e44; } .avatar.mix { background: #7048d6; }

/* ── roster: full-width readable rows ── */
.roster-tools { display: flex; align-items: center; gap: var(--s3); flex-wrap: wrap; margin-bottom: var(--s4); }
.roster-search { flex: 1; min-width: 240px; padding: 10px 13px; border: 1.5px solid var(--line);
  border-radius: var(--radius-sm); font-size: var(--t-body); font-family: inherit; }
.roster-search:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 4px var(--brand-soft); }
.filter-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.fchip { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 7px 13px;
  font-size: var(--t-meta); font-weight: 700; color: var(--muted); cursor: pointer; }
.fchip.on { background: var(--brand); border-color: var(--brand); color: #fff; }
.roster-sort { padding: 8px 12px; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  font-size: var(--t-meta); font-weight: 700; color: var(--muted); background: #fff; cursor: pointer; }
.roster { display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-sm); overflow: hidden; }
.roster-row { display: flex; align-items: center; gap: var(--s4); padding: var(--s3) var(--s4);
  min-height: 72px; border-bottom: 1px solid var(--line-soft); cursor: pointer; transition: .12s;
  text-align: left; background: none; font: inherit; color: var(--ink); width: 100%; }
.roster-row:last-child { border-bottom: none; }
.roster-row:hover { background: var(--brand-soft); }
.roster-row .avatar { width: 52px; height: 52px; font-size: 17px; }
.rr-main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.rr-name { font-size: 18px; font-weight: 700; }
.rr-sub { font-size: var(--t-body); color: var(--muted); }
.rr-right { display: flex; flex-direction: column; align-items: flex-end; gap: 5px; }
.rr-next { font-size: var(--t-meta); color: var(--muted); }
.rr-next b { color: var(--ink); }
.rr-chev { font-size: 20px; color: var(--faint); }
.roster-empty { text-align: center; padding: var(--s7) var(--s4); color: var(--muted); }
.roster-empty .big { font-size: 50px; }

/* ── student page: header + KPI + tabs ── */
.pl-header { display: flex; align-items: center; gap: var(--s4); background: var(--panel);
  border: 1px solid var(--line); border-radius: var(--radius); padding: var(--s4) var(--s5);
  box-shadow: var(--shadow-sm); margin-bottom: var(--s4); }
.pl-header .avatar { width: 64px; height: 64px; font-size: 22px; }
.plh-main { flex: 1; min-width: 0; }
.plh-name { font-size: var(--t-page); font-weight: 700; margin: 0; display: flex; align-items: center; gap: var(--s3); }
.plh-sub { color: var(--muted); font-size: var(--t-body); margin: 4px 0 0; }

.kpi-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s4); margin-bottom: var(--s4); }
@media (max-width: 720px) { .kpi-row { grid-template-columns: repeat(2, 1fr); } }
.kpi { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: var(--s4); box-shadow: var(--shadow-sm); }
.kpi .k-label { font-size: var(--t-meta); font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }
.kpi .k-val { font-size: var(--t-page); font-weight: 700; margin-top: 6px; line-height: 1.1; }
.kpi .k-delta { font-size: var(--t-meta); margin-top: 3px; color: var(--muted); }
.kpi .k-delta.up { color: var(--teacher); } .kpi .k-delta.down { color: var(--danger); }

.pl-tabs { display: flex; gap: 4px; background: var(--bg-2); padding: 4px; border-radius: var(--radius-sm);
  margin-bottom: var(--s4); width: fit-content; max-width: 100%; overflow: auto; }
.pl-tab { padding: 8px 16px; border: none; background: transparent; border-radius: 8px; cursor: pointer;
  font-weight: 700; font-size: var(--t-body); color: var(--muted); white-space: nowrap; }
.pl-tab.active { background: #fff; color: var(--brand-ink); box-shadow: var(--shadow-sm); }

/* overview summary cards */
.ov-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s4); }
@media (max-width: 720px) { .ov-grid { grid-template-columns: 1fr; } }
.ov-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: var(--s4) var(--s5); box-shadow: var(--shadow-sm); cursor: pointer; transition: .15s; }
.ov-card:hover { border-color: #d2d9ee; box-shadow: var(--shadow); transform: translateY(-2px); }
.ov-card h4 { margin: 0 0 var(--s2); font-size: var(--t-emph); display: flex; justify-content: space-between; }
.ov-card .ov-go { color: var(--brand-ink); font-weight: 700; font-size: var(--t-meta); }
.ov-line { font-size: var(--t-body); color: var(--muted); margin: 3px 0; }

/* ── calendar (polished) ── */
.cal-top { display: flex; align-items: center; justify-content: space-between; gap: var(--s2); flex-wrap: wrap; margin-bottom: var(--s3); }
.cal-top .panel-title { margin: 0; }
.cal-nav { display: flex; align-items: center; gap: 6px; }
.cal-month { font-weight: 700; font-size: var(--t-body); min-width: 130px; text-align: center; }
.cal-kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s2); margin-bottom: var(--s3); }
.cal-kpi { background: var(--bg-2); border-radius: var(--radius-sm); padding: 9px 10px; }
.cal-kpi b { display: block; font-size: var(--t-title); font-weight: 800; }
.cal-kpi span { font-size: 11px; color: var(--muted); font-weight: 600; }
.cal-kpi.held b { color: var(--teacher); } .cal-kpi.makeup b { color: var(--warn); } .cal-kpi.missed b { color: var(--danger); }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: var(--s2); }
.cal-dow { margin-bottom: 6px; }
.cal-dow-c { text-align: center; font-size: 11px; font-weight: 800; color: var(--faint);
  text-transform: uppercase; letter-spacing: .3px; }
.cal-cell { min-height: 60px; border-radius: var(--radius-sm); padding: 6px 8px; cursor: pointer;
  position: relative; transition: .12s; display: flex; flex-direction: column; align-items: flex-start;
  background: var(--empty); border: 1px solid transparent; }
.cal-cell:hover { border-color: var(--brand); }
.cal-cell.empty { background: transparent; cursor: default; }
/* class days get a soft colour TINT (so they read against the white panel, unlike the old white
   cells which camouflaged) + a bold left accent bar. */
.cal-cell.held   { background: #e7f7ec; }
.cal-cell.makeup { background: #fff3de; }
.cal-cell.missed { background: #ffe7e7; }
.cal-cell.has::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 4px;
  border-radius: 0 4px 4px 0; }
.cal-cell.held::before { background: var(--teacher); }
.cal-cell.makeup::before { background: var(--warn); }
.cal-cell.missed::before { background: var(--danger); }
.cal-num { font-size: var(--t-body); font-weight: 600; color: var(--ink); }
.cal-cell.today .cal-num { background: var(--brand); color: #fff; width: 24px; height: 24px;
  border-radius: 50%; display: grid; place-items: center; margin: -2px 0 0 -3px; }
.cal-cell.sel { border-color: var(--brand); box-shadow: 0 0 0 2px var(--brand-soft); }
.cal-hrs { margin-top: auto; font-size: 11px; font-weight: 700; }
.cal-cell.held .cal-hrs { color: var(--teacher); }
.cal-cell.makeup .cal-hrs { color: var(--warn); }
.cal-cell.missed .cal-hrs { color: var(--danger); }
.cal-legend { display: flex; gap: var(--s4); margin: var(--s3) 0 0; font-size: var(--t-meta); color: var(--muted); }
.cal-legend span { display: inline-flex; align-items: center; gap: 6px; }
.cal-legend i { width: 9px; height: 9px; border-radius: 50%; }
.cal-legend .held { background: var(--teacher); } .cal-legend .makeup { background: var(--warn); } .cal-legend .missed { background: var(--danger); }
.cal-day { margin-top: var(--s3); }
.cal-day-card { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: var(--s3) var(--s4); background: #fff; }
.cd-head { display: flex; align-items: center; gap: var(--s2); margin-bottom: var(--s1); }
.cd-actions { margin-top: var(--s3); }

/* ── exams: hero + countdown + portion ── */
.exam-card { border: 1px solid var(--line); border-radius: var(--radius); padding: var(--s4) var(--s5);
  margin-bottom: var(--s4); background: #fff; box-shadow: var(--shadow-sm); }
.exam-card.exam-hero { border: none; background: linear-gradient(135deg, #f2f5ff, #f7f2ff); box-shadow: var(--shadow); }
.exam-top { display: flex; align-items: center; justify-content: space-between; gap: var(--s3); flex-wrap: wrap; }
.exam-name { font-size: var(--t-emph); font-weight: 800; display: flex; align-items: center; gap: var(--s2); }
.exam-count { text-align: right; }
.exam-count b { font-size: var(--t-title); font-weight: 800; color: var(--brand-ink); }
.exam-count.soon b { color: var(--danger); }
.exam-count span { display: block; font-size: 11px; color: var(--muted); }
.exam-sub { font-size: var(--t-body); color: var(--muted); margin: 6px 0; }
.track-chip { font-size: 11px; font-weight: 800; padding: 3px 10px; border-radius: 999px; }
.track-ahead { background: var(--ok-soft); color: #1f7a34; }
.track-ontrack { background: var(--student-soft); color: #14608f; }
.track-behind { background: var(--danger-soft); color: #b42318; }
.progbar { height: 8px; border-radius: 999px; background: var(--line); overflow: hidden; margin: var(--s2) 0; }
.progbar > i { display: block; height: 100%; background: var(--grad); border-radius: 999px; }
.topics { display: flex; gap: 6px; flex-wrap: wrap; margin-top: var(--s2); }
.topic { font-size: var(--t-meta); font-weight: 600; padding: 4px 10px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: #fff; color: var(--ink); display: inline-flex; align-items: center; gap: 5px; }
.topic::before { content: "○"; font-size: 11px; }
.topic.in_progress { background: var(--warn-soft); border-color: #ffe0a8; color: #8a5a00; }
.topic.in_progress::before { content: "◐"; }
.topic.done { background: var(--ok-soft); border-color: #c3f0cf; color: #1f7a34; }
.topic.done::before { content: "●"; }
.topic .tx { margin-left: 4px; opacity: .5; }
.exam-edit { display: grid; grid-template-columns: 1.1fr 1fr auto auto; gap: 6px; align-items: center; margin-top: var(--s2); }
.exam-edit input { padding: 7px 9px; border: 1.5px solid var(--line); border-radius: 8px; font-size: var(--t-meta); font-family: inherit; width: 100%; }
@media (max-width: 560px) { .exam-edit { grid-template-columns: 1fr 1fr; } }
.ex-add { display: flex; gap: var(--s2); margin-top: var(--s3); }

/* view-first subject block */
.paper-block { border-top: 1px solid var(--line-soft); padding: var(--s3) 0; }
.paper-block:first-of-type { border-top: none; }
.pb-head { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--s3); }
.pb-title { display: flex; flex-direction: column; gap: 2px; }
.pb-subj { font-size: var(--t-emph); font-weight: 700; }
.pb-date { font-size: var(--t-meta); color: var(--muted); }
.pb-right { display: flex; align-items: center; gap: var(--s2); }
.pb-portion { margin: var(--s2) 0; }
.pb-portion-meta { display: flex; align-items: center; gap: var(--s2); font-size: var(--t-meta); color: var(--muted); margin-top: 4px; }
.topic-add { border: 1px dashed var(--line); border-radius: 999px; padding: 4px 12px; font-size: var(--t-meta);
  font-family: inherit; width: 130px; }
.topic-add:focus { outline: none; border-color: var(--brand); border-style: solid; }
.topic-suggest { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-top: var(--s2); }
.ts-label { font-size: 11px; font-weight: 700; color: var(--faint); text-transform: uppercase; letter-spacing: .3px; }
.topic.sugg { border-style: dashed; color: var(--muted); font-weight: 600; }
.topic.sugg::before { content: none; }
.topic.sugg:hover { border-color: var(--brand); color: var(--brand-ink); background: var(--brand-soft); }

/* exams: layout switcher + shared bits */
.exam-headrow { display: flex; align-items: center; justify-content: space-between; gap: var(--s3); flex-wrap: wrap; margin-bottom: 4px; }
.exam-style { padding: 3px; }
.exam-style .seg { padding: 6px 12px; font-size: var(--t-meta); }
.progwrap { display: flex; align-items: center; gap: var(--s2); }
.progwrap .progbar { flex: 1; min-width: 70px; max-width: 160px; margin: 0; }
.pp-pct { font-size: var(--t-meta); font-weight: 700; color: var(--brand-ink); }
.pp-none { font-size: var(--t-meta); color: var(--faint); font-style: italic; }
.et-hint { font-size: var(--t-meta); color: var(--faint); margin: var(--s2) 0 0; }

/* layout 1: table */
.exam-table { width: 100%; border-collapse: collapse; margin-top: var(--s2); }
.exam-table th { text-align: left; font-size: 11px; font-weight: 800; color: var(--faint); text-transform: uppercase;
  letter-spacing: .3px; padding: 6px 10px; border-bottom: 1px solid var(--line); }
.exam-table td { padding: 10px; border-bottom: 1px solid var(--line-soft); font-size: var(--t-body); vertical-align: middle; }
.et-row { cursor: pointer; transition: .12s; }
.et-row:hover { background: var(--brand-soft); }
.et-subj { font-weight: 700; }
.et-ctrls { text-align: right; white-space: nowrap; }
.et-detail > td { background: #fbfcfe; }

/* layout 2: timeline */
.tl { display: flex; flex-direction: column; gap: var(--s3); margin-top: var(--s3);
  border-left: 2px solid var(--line); padding-left: var(--s4); }
.tl-item { display: flex; gap: var(--s3); position: relative; }
.tl-badge { flex: none; width: 52px; height: 52px; border-radius: var(--radius-sm); background: var(--brand-soft);
  color: var(--brand-ink); display: flex; flex-direction: column; align-items: center; justify-content: center;
  line-height: 1; margin-left: calc(-1 * var(--s4) - 27px); box-shadow: var(--shadow-sm); }
.tl-badge b { font-size: 19px; font-weight: 800; }
.tl-badge span { font-size: 10px; font-weight: 700; letter-spacing: .3px; }
.tl-main { flex: 1; min-width: 0; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: var(--s3) var(--s4); box-shadow: var(--shadow-sm); }
.tl-h { display: flex; align-items: center; gap: var(--s3); }
.tl-subj { font-size: var(--t-emph); font-weight: 700; flex: 1; }
.tl-ctrls { white-space: nowrap; }
.tl-portion { margin: var(--s2) 0; }

/* layout 3: cards */
.ecard-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--s3); margin-top: var(--s3); }
.ecard { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: var(--s4); background: #fff; box-shadow: var(--shadow-sm); }
.ec-h { display: flex; align-items: center; justify-content: space-between; gap: var(--s2); }
.ec-subj { font-size: var(--t-emph); font-weight: 700; }
.ec-date { font-size: var(--t-meta); color: var(--muted); margin: 4px 0 var(--s2); display: flex; align-items: center; justify-content: space-between; }
.ec-ctrls { white-space: nowrap; }

/* type-to-search chapter adder */
.topic-typeahead { position: relative; margin-top: var(--s2); max-width: 340px; }
.topic-add { border: 1.5px solid var(--line); border-radius: var(--radius-sm); padding: 8px 11px;
  font-size: var(--t-body); font-family: inherit; width: 100%; }
.topic-add:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.topic-drop { position: absolute; z-index: 30; left: 0; right: 0; top: calc(100% + 4px); background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius-sm); box-shadow: var(--shadow); overflow: hidden; max-height: 260px; overflow-y: auto; }
.td-item { padding: 9px 12px; font-size: var(--t-body); cursor: pointer; }
.td-item:hover { background: var(--brand-soft); color: var(--brand-ink); }
.td-empty { padding: 9px 12px; font-size: var(--t-meta); color: var(--muted); }

/* My Classroom */
.cls-list { display: flex; flex-direction: column; padding: 0; }
.cls-row { display: flex; align-items: center; gap: var(--s4); padding: var(--s3) var(--s4); border-bottom: 1px solid var(--line-soft); }
.cls-row:last-child { border-bottom: none; }
.cls-main { flex: 1; min-width: 0; }
.cls-status { display: flex; align-items: center; gap: var(--s2); }
.cls-acts { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.cls-take { display: flex; gap: var(--s2); align-items: center; flex-wrap: wrap; margin-top: var(--s2); }
.cls-scored { margin-top: var(--s2); font-size: var(--t-body); }
.cls-scored b { color: var(--teacher); }
@media (max-width: 640px) { .cls-row { flex-direction: column; align-items: flex-start; } }

/* student My Tests — uniform cards */
.ct-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--s4); align-items: stretch; }
.ct-card { display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-sm); padding: var(--s4) var(--s5); min-height: 190px; }
.ct-top { display: flex; align-items: center; justify-content: space-between; gap: var(--s2); }
.ct-title { font-size: var(--t-emph); font-weight: 700; }
.ct-meta { font-size: var(--t-meta); color: var(--muted); margin-top: 4px; }
.ct-actions { margin-top: auto; padding-top: var(--s3); display: grid; gap: var(--s2); }
.btn.block { width: 100%; justify-content: center; }
.ct-upload { display: grid; gap: var(--s2); }
.ct-file { display: block; border: 1.5px dashed var(--line); border-radius: var(--radius-sm); padding: 9px 12px;
  font-size: var(--t-meta); color: var(--muted); cursor: pointer; text-align: center; }
.ct-file:hover { border-color: var(--brand); color: var(--brand-ink); }
.ct-sub { font-size: var(--t-meta); color: var(--teacher); margin-top: 6px; }
.ct-scored { font-size: var(--t-body); } .ct-scored b { color: var(--teacher); font-size: var(--t-title); }
.ct-locked { font-size: var(--t-body); color: var(--muted); }

/* pending marks (from My Classroom) */
.mk-pending { display: flex; align-items: center; gap: var(--s3); padding: var(--s3) 0; border-bottom: 1px solid var(--line-soft); }
.mk-pill-pending { font-size: 11px; font-weight: 700; background: var(--warn-soft); color: #8a5a00;
  padding: 2px 10px; border-radius: 999px; }

/* ═════════════════════════ dark mode ═════════════════════════
   Toggled by data-theme="dark" on <html>; tokens flip first, then the handful of surfaces
   that use hardcoded light colours are re-pointed at the tokens. */
.theme-toggle { font-size: 16px; padding: 6px 10px; }
.login-theme { position: fixed; top: 16px; right: 16px; z-index: 5; }

[data-theme="dark"] {
  --bg: #0e1320; --bg-2: #1a2133; --panel: #161d2e; --ink: #e7ebf5; --muted: #9aa3b8; --faint: #707a90;
  --line: #283149; --line-soft: #212a3f;
  --brand-ink: #9db1ff; --brand-soft: #1e2745;
  --teacher: #4cc06a; --teacher-soft: #15301f; --student: #58a6e8; --student-soft: #132b3f;
  --warn: #ffb02e; --warn-soft: #33270f; --danger: #ff6b6b; --danger-soft: #3a1a1e; --ok-soft: #14301f;
  --empty: #1c2438;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.35), 0 2px 8px rgba(0,0,0,.3);
  --shadow: 0 2px 6px rgba(0,0,0,.4), 0 12px 32px rgba(0,0,0,.35);
  --shadow-lg: 0 18px 50px rgba(0,0,0,.55);
}
/* surfaces that hardcode white/near-white in light mode */
[data-theme="dark"] .topbar { background: rgba(18, 24, 40, .88); }
[data-theme="dark"] .login-screen { background:
  radial-gradient(900px 500px at 12% -10%, #1a2340, transparent 60%),
  radial-gradient(900px 600px at 100% 110%, #241a40, transparent 55%), var(--bg); }
[data-theme="dark"] .btn, [data-theme="dark"] .chip, [data-theme="dark"] .mini-btn,
[data-theme="dark"] .fchip, [data-theme="dark"] .roster-sort, [data-theme="dark"] .pattern-card,
[data-theme="dark"] .active-job, [data-theme="dark"] .topic, [data-theme="dark"] .modal-close {
  background: var(--bg-2); color: var(--ink); }
[data-theme="dark"] .btn.primary { color: #fff; }
[data-theme="dark"] .fchip.on { background: var(--brand); color: #fff; }
[data-theme="dark"] .seg.active, [data-theme="dark"] .tab.active, [data-theme="dark"] .pl-tab.active {
  background: var(--panel); color: var(--brand-ink); }
[data-theme="dark"] .field select, [data-theme="dark"] .field input, [data-theme="dark"] .field textarea,
[data-theme="dark"] .free-input, [data-theme="dark"] .roster-search, [data-theme="dark"] .topic-add,
[data-theme="dark"] .exam-edit input, [data-theme="dark"] .login-card input, [data-theme="dark"] .modal-comment {
  background: var(--bg-2); color: var(--ink); border-color: var(--line); }
[data-theme="dark"] .cal-day-card, [data-theme="dark"] .ecard, [data-theme="dark"] .exam-card,
[data-theme="dark"] .topic-drop { background: var(--panel); }
[data-theme="dark"] .exam-card.exam-hero { background: linear-gradient(135deg, #1c2445, #251c45); }
[data-theme="dark"] .chapters, [data-theme="dark"] .et-detail > td { background: #131a2b; }
[data-theme="dark"] .teacher-block { background: #131a2b; border-color: #2c3550; }
[data-theme="dark"] .analytics { background: var(--panel); }
[data-theme="dark"] .custom-box { border-color: #2c3550; }
[data-theme="dark"] .cal-cell.held { background: #17301f; }
[data-theme="dark"] .cal-cell.makeup { background: #322709; }
[data-theme="dark"] .cal-cell.missed { background: #391a1c; }
[data-theme="dark"] .warn-banner { background: var(--warn-soft); border-color: #4a3a14; color: #ffcf7d; }
[data-theme="dark"] .warn-banner code { background: var(--bg-2); border-color: #4a3a14; }
[data-theme="dark"] .full-note { background: var(--ok-soft); border-color: #1d4a2a; color: #6fe08f; }
/* hardcoded status text colours -> readable-on-dark variants */
[data-theme="dark"] .st-active { color: #6fe08f; }
[data-theme="dark"] .st-trial { color: #ffcf7d; }
[data-theme="dark"] .st-lead { color: #7fc4f5; }
[data-theme="dark"] .track-ahead { color: #6fe08f; }
[data-theme="dark"] .track-ontrack { color: #7fc4f5; }
[data-theme="dark"] .track-behind { color: #ff8f8f; }
[data-theme="dark"] .mk-band-good { color: #6fe08f; }
[data-theme="dark"] .mk-band-mid { color: #ffcf7d; }
[data-theme="dark"] .mk-band-low { color: #ff8f8f; }
[data-theme="dark"] .mk-pct { color: #6fe08f; }
[data-theme="dark"] .topic.in_progress { color: #ffcf7d; border-color: #4a3a14; }
[data-theme="dark"] .topic.done { color: #6fe08f; border-color: #1d4a2a; }
[data-theme="dark"] .mk-pill-pending { color: #ffcf7d; }
[data-theme="dark"] .status-pill.done { color: #6fe08f; }
[data-theme="dark"] .status-pill.running { color: #ffcf7d; }
[data-theme="dark"] .ct-file:hover, [data-theme="dark"] .td-item:hover { color: var(--brand-ink); }

/* teacher dashboard: recent account activity */
.act-row { display: flex; align-items: center; gap: var(--s3); padding: 8px 0; border-bottom: 1px solid var(--line-soft); font-size: var(--t-body); }
.act-row:last-child { border-bottom: none; }
.act-row.bad .act-what b { color: var(--danger); }
.act-ico { width: 22px; text-align: center; }
.act-what { flex: 1; min-width: 0; }
.act-meta { font-size: var(--t-meta); color: var(--muted); white-space: nowrap; }

/* ── marks: per-subject sparkline ── */
.mk-subj { display: flex; align-items: center; gap: var(--s3); padding: var(--s3) 0; border-bottom: 1px solid var(--line-soft); cursor: pointer; }
.mk-subj:last-of-type { border-bottom: none; }
.mk-name { width: 92px; font-weight: 700; font-size: var(--t-body); }
.mk-spark { flex: 0 0 160px; width: 160px; height: 34px; }
.mk-latest { font-weight: 800; font-size: var(--t-emph); min-width: 56px; text-align: right; margin-left: auto; }
.mk-band-good { color: #1f7a34; } .mk-band-mid { color: #8a5a00; } .mk-band-low { color: #b42318; }
.mk-trend { width: 22px; text-align: center; font-weight: 800; }
.mk-trend.up { color: var(--teacher); } .mk-trend.down { color: var(--danger); } .mk-trend.flat { color: var(--faint); }
.mk-avg { font-size: var(--t-meta); color: var(--muted); min-width: 62px; text-align: right; }
.mk-detail { padding: var(--s2) 0 var(--s3) 104px; }
.mk-detail .row { display: flex; justify-content: space-between; font-size: var(--t-body); padding: 5px 0; color: var(--muted); }
.mk-add { display: flex; gap: 7px; margin-top: var(--s4); flex-wrap: wrap; align-items: center; }
.mk-add .free-input { flex: 1; min-width: 100px; }
.mk-none { font-size: var(--t-meta); color: var(--faint); }

/* ── notes ── */
.nt-row { padding: var(--s3) 0; border-bottom: 1px solid var(--line-soft); }
.nt-row:last-of-type { border-bottom: none; }
.nt-body { font-size: var(--t-body); margin-top: 4px; white-space: pre-wrap; color: var(--muted); }
.nt-add { display: grid; gap: var(--s2); margin-top: var(--s4); }
.nt-add textarea { min-height: 70px; resize: vertical; }


/* ═════════════════════════ facelift ═════════════════════════ */
/* Real Inter (self-hosted, offline) — was declared but never loaded */
@font-face {
  font-family: "Inter";
  src: url("/fonts/InterVariable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
.kpi .k-val, .exam-count b, .cal-kpi b, .an-item b, .mk-latest, .hero .hero-meta b, .cal-num
{ font-variant-numeric: tabular-nums; }

/* inline SVG icons */
.icn { vertical-align: -3px; flex: none; }
.brand-icn { color: var(--brand); margin-right: 7px; vertical-align: -4px; }
.nav-item .ico { display: inline-flex; align-items: center; justify-content: center; }
.btn .icn { vertical-align: -3.5px; }

/* toasts */
#toasts { position: fixed; right: 18px; bottom: 18px; z-index: 90; display: flex;
  flex-direction: column; gap: 8px; max-width: min(360px, 90vw); }
.toast { background: var(--ink); color: var(--bg); padding: 11px 16px; border-radius: 11px;
  font-size: var(--t-body); font-weight: 600; box-shadow: var(--shadow-lg);
  animation: toast-in .22s ease; display: flex; align-items: center; gap: 9px; }
.toast.error { background: var(--danger); color: #fff; }
.toast.success { background: var(--teacher); color: #fff; }
.toast.out { opacity: 0; transform: translateY(8px); transition: .25s; }
@keyframes toast-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; } }

/* skeleton loaders */
.sk { background: linear-gradient(90deg, var(--bg-2) 25%, var(--line-soft) 50%, var(--bg-2) 75%);
  background-size: 200% 100%; animation: shimmer 1.2s infinite; border-radius: 10px; }
@keyframes shimmer { to { background-position: -200% 0; } }
.sk-page .sk-title { height: 30px; width: 260px; margin-bottom: 10px; }
.sk-page .sk-sub { height: 14px; width: 420px; max-width: 80%; margin-bottom: 22px; }
.sk-row4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s4); margin-bottom: var(--s4); }
.sk-row4 .sk { height: 96px; }
.sk-block { height: 220px; margin-bottom: var(--s4); }
.sk-list .sk { height: 64px; margin-bottom: 10px; }

/* unified empty / error states */
.empty-state { text-align: center; padding: var(--s7) var(--s4); color: var(--muted);
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.empty-state .es-icn { width: 72px; height: 72px; margin: 0 auto var(--s3); border-radius: 50%;
  background: var(--brand-soft); color: var(--brand-ink); display: grid; place-items: center; }
.empty-state.err .es-icn { background: var(--danger-soft); color: var(--danger); }
.empty-state h3 { margin: 0 0 6px; color: var(--ink); font-size: var(--t-emph); }
.empty-state p { margin: 0 auto var(--s4); max-width: 46ch; font-size: var(--t-body); }

/* danger-solid for confirm dialogs */
.btn.danger-solid { background: var(--danger); border: none; color: #fff; }

/* press / focus states + view transition */
.btn:active, .mini-btn:active, .fchip:active, .seg:active, .pl-tab:active { transform: translateY(1px); }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 4px; }
.view.anim > * { animation: view-in .18s ease both; }
@keyframes view-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* exams: de-nest the borders a touch */
.ecard { box-shadow: none; border-color: var(--line-soft); }

/* mobile: off-canvas sidebar drawer */
.nav-burger { display: none; }
.cal-scroll { overflow-x: auto; }
.cal-scroll .cal-grid { min-width: 540px; }
@media (max-width: 840px) {
  .layout { grid-template-columns: 1fr; }
  .nav-burger { display: inline-flex; }
  .sidebar { position: fixed; left: 0; top: 62px; bottom: 0; width: 264px; z-index: 45;
    transform: translateX(-105%); transition: transform .22s ease; height: auto;
    box-shadow: var(--shadow-lg); }
  .sidebar.open { transform: none; }
  .nav-scrim { position: fixed; inset: 62px 0 0 0; background: rgba(10, 14, 26, .45); z-index: 40; }
  .brand-tag { display: none; }
  .user-meta { display: none; }
  .view { padding: 18px 14px 40px; }
  .hero { padding: 22px 20px; }
  .page-title { font-size: 22px; }
}

/* print: the product prints paper — make the browser print useful */
@media print {
  .topbar, .sidebar, .pl-tabs, .theme-toggle, .nav-burger, button, .btn, .ex-add, .mk-add,
  .nt-add, .roster-tools, .cal-nav, .topic-add, .topic-suggest, #toasts { display: none !important; }
  .layout { display: block; }
  .view { padding: 0; max-width: none; }
  body { background: #fff; }
  .panel, .kpi, .exam-card, .ecard, .ct-card, .pl-header { box-shadow: none; border: 1px solid #bbb;
    break-inside: avoid; }
  .hero { background: #fff !important; color: #000; border: 1px solid #bbb; }
}