/* TerDU — Virtual fizika laboratoriyasi: umumiy uslub (oq fon, to‘q ko‘k akademik palitra, yorug‘/qorong‘i, mobil) */
:root {
  --bg: #ffffff; --bg2: #f4f7fc; --panel: #ffffff; --ink: #0f1d33; --muted: #52607a; --line: #dbe2ee; --line2: #c5cfdf;
  --navy: #0b2a5b; --navy2: #123d7e; --brand: #1c4fb8; --brand-h: #163f95; --brand-ink: #ffffff; --accent: #2f80ed;
  --ok: #157347; --warn: #9a5b00; --err: #b42318; --chip: #eef3fb; --focus: #2f80ed;
  --shadow: 0 1px 2px rgba(15, 29, 51, .06), 0 8px 24px rgba(15, 29, 51, .06);
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; --serif: "IBM Plex Serif", Georgia, serif;
  --h: 48px; --r: 12px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1220; --bg2: #0f1829; --panel: #111c30; --ink: #e8eef8; --muted: #9fb0c9; --line: #22314a; --line2: #2d3f5d;
    --navy: #0a1c3d; --navy2: #102a57; --brand: #5b8ef0; --brand-h: #7aa4f5; --brand-ink: #071226; --accent: #7aa4f5;
    --ok: #4cc38a; --warn: #f0b354; --err: #ff8a80; --chip: #17243b; --focus: #8fb4ff;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 10px 30px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b1220; --bg2: #0f1829; --panel: #111c30; --ink: #e8eef8; --muted: #9fb0c9; --line: #22314a; --line2: #2d3f5d;
  --navy: #0a1c3d; --navy2: #102a57; --brand: #5b8ef0; --brand-h: #7aa4f5; --brand-ink: #071226; --accent: #7aa4f5;
  --ok: #4cc38a; --warn: #f0b354; --err: #ff8a80; --chip: #17243b; --focus: #8fb4ff;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 10px 30px rgba(0, 0, 0, .35);
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; }
body { background: var(--bg2); color: var(--ink); font: 16px/1.55 var(--sans); min-height: 100vh; display: flex; flex-direction: column; -webkit-font-smoothing: antialiased; }
body.plain { background: var(--bg); }
main { flex: 1; }
a { color: var(--brand); text-underline-offset: 3px; }
a:hover { color: var(--brand-h); }
img { -webkit-user-drag: none; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 6px; }
.sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- yuqori panel ---------- */
.top { position: sticky; top: 0; z-index: 10; background: var(--panel); border-bottom: 1px solid var(--line); }
.top-in { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; gap: 12px; padding: 10px 20px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); min-width: 0; }
.brand img { width: 44px; height: 44px; flex: none; }
.brand > span { min-width: 0; display: flex; flex-direction: column; }
.brand b { font: 600 17px/1.2 var(--serif); color: var(--navy); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
:root[data-theme="dark"] .brand b { color: var(--ink); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .brand b { color: var(--ink); } }
.brand small { color: var(--muted); font-size: 13px; line-height: 1.3; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.top .sp { flex: 1; }
.tools { display: flex; align-items: center; gap: 8px; flex: none; }
.ctl { height: 40px; border: 1px solid var(--line2); background: var(--panel); color: var(--ink); border-radius: 10px; padding: 0 12px; font: 500 14px var(--sans); cursor: pointer; }
.ctl:hover { border-color: var(--brand); }
.ctl.icon { width: 40px; padding: 0; display: inline-grid; place-items: center; }
.ctl svg { width: 18px; height: 18px; }
.who { font-size: 14px; color: var(--muted); max-width: 28vw; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }

/* ---------- kirish / ro‘yxat sahifalari ---------- */
.auth-wrap { max-width: 1200px; margin: 0 auto; padding: 40px 20px 48px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 460px); gap: 48px; align-items: center; width: 100%; }
.auth-wrap.wide { grid-template-columns: minmax(0, 1fr) minmax(0, 540px); }
.intro { background: linear-gradient(150deg, var(--navy) 0%, var(--navy2) 60%, #1c4fb8 130%); color: #fff; border-radius: 20px; padding: 40px; position: relative; overflow: hidden; min-height: 420px; display: flex; flex-direction: column; justify-content: space-between; }
.intro::after { content: ""; position: absolute; right: -80px; bottom: -80px; width: 320px; height: 320px; border-radius: 50%; border: 40px solid rgba(255, 255, 255, .06); }
.intro .kaf { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; opacity: .8; font-weight: 600; }
.intro h2 { font: 600 clamp(26px, 3vw, 36px)/1.2 var(--serif); margin: 14px 0 12px; color: #fff; }
.intro p { opacity: .88; margin: 0; max-width: 460px; }
.intro ul { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 12px; position: relative; z-index: 1; }
.intro li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; opacity: .95; }
.intro li i { flex: none; width: 26px; height: 26px; border-radius: 8px; background: rgba(255, 255, 255, .14); display: grid; place-items: center; font-style: normal; font-size: 14px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 32px; box-shadow: var(--shadow); }
.card h1 { font: 600 clamp(26px, 3.2vw, 30px)/1.2 var(--serif); margin: 0 0 8px; color: var(--navy); }
:root[data-theme="dark"] .card h1 { color: var(--ink); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .card h1 { color: var(--ink); } }
.lead { color: var(--muted); margin: 0 0 24px; font-size: 15.5px; }
.field { margin: 0 0 16px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin: 0 0 6px; }
.field label .req { color: var(--err); margin-left: 2px; }
.hint { display: block; color: var(--muted); font-size: 13px; margin-top: 6px; }
.row3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.row2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.inp { width: 100%; height: var(--h); border: 1px solid var(--line2); border-radius: var(--r); padding: 0 14px; background: var(--panel); color: var(--ink); font: 16px var(--sans); transition: border-color .15s, box-shadow .15s; }
.inp:hover { border-color: var(--muted); }
.inp:focus { outline: none; border-color: var(--focus); box-shadow: 0 0 0 4px color-mix(in srgb, var(--focus) 22%, transparent); }
.inp[aria-invalid="true"] { border-color: var(--err); }
.inp.code { text-transform: uppercase; letter-spacing: .06em; font-family: "IBM Plex Mono", ui-monospace, monospace; }
textarea.inp { height: 140px; padding: 10px 14px; resize: vertical; }
.pw { position: relative; }
.pw .inp { padding-right: 52px; }
.pw button { position: absolute; right: 4px; top: 4px; width: 40px; height: 40px; border: 0; background: transparent; color: var(--muted); border-radius: 8px; cursor: pointer; display: grid; place-items: center; }
.pw button:hover { color: var(--ink); background: var(--chip); }
.pw button svg { width: 20px; height: 20px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; height: var(--h); padding: 0 22px; border: 1px solid transparent; border-radius: var(--r); background: var(--brand); color: var(--brand-ink); font: 600 16px var(--sans); cursor: pointer; text-decoration: none; transition: background .15s; }
.btn:hover { background: var(--brand-h); color: var(--brand-ink); }
.btn.full { width: 100%; }
.btn.ghost { background: transparent; color: var(--brand); border-color: var(--line2); }
.btn.ghost:hover { background: var(--chip); }
.btn.sm { height: 40px; padding: 0 16px; font-size: 14.5px; border-radius: 10px; }
.btn:disabled { opacity: .7; cursor: progress; }
.spin { width: 18px; height: 18px; border-radius: 50%; border: 2.5px solid currentColor; border-right-color: transparent; animation: sp .8s linear infinite; display: none; }
.btn.busy .spin { display: inline-block; }
@keyframes sp { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spin { animation-duration: 2s; } }
.check { display: flex; gap: 12px; align-items: flex-start; font-size: 14px; line-height: 1.5; margin: 6px 0 18px; padding: 14px; border: 1px solid var(--line); border-radius: var(--r); background: var(--bg2); cursor: pointer; }
.check input { margin-top: 2px; width: 20px; height: 20px; flex: none; accent-color: var(--brand); }
.msg { border-radius: var(--r); padding: 12px 14px; font-size: 14.5px; margin: 0 0 16px; border: 1px solid transparent; }
.msg.err { background: color-mix(in srgb, var(--err) 9%, transparent); color: var(--err); border-color: color-mix(in srgb, var(--err) 30%, transparent); }
.msg.ok { background: color-mix(in srgb, var(--ok) 9%, transparent); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.msg.warn { background: color-mix(in srgb, var(--warn) 10%, transparent); color: var(--warn); }
.msg.info { background: var(--chip); color: var(--ink); }
.alt { text-align: center; margin: 20px 0 0; font-size: 15px; color: var(--muted); }
.alt a { font-weight: 600; }

/* ---------- katalog ---------- */
.wrap { max-width: 1200px; margin: 0 auto; padding: 32px 20px 56px; width: 100%; }
.hero { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 16px; margin: 0 0 22px; }
.hero h1 { font: 600 clamp(26px, 3.4vw, 34px)/1.2 var(--serif); margin: 0 0 6px; color: var(--navy); }
:root[data-theme="dark"] .hero h1 { color: var(--ink); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .hero h1 { color: var(--ink); } }
.hero .kaf { color: var(--brand); font-size: 13px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 6px; }
.pill { height: 38px; padding: 0 16px; border-radius: 999px; border: 1px solid var(--line2); background: var(--panel); color: var(--ink); font: 500 14px var(--sans); cursor: pointer; }
.pill.on { background: var(--navy); color: #fff; border-color: var(--navy); }
.search { width: min(340px, 100%); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.sec { font: 600 13px var(--sans); color: var(--muted); letter-spacing: .1em; text-transform: uppercase; margin: 26px 0 12px; }
.lab { display: flex; flex-direction: column; gap: 10px; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 20px; box-shadow: var(--shadow); position: relative; overflow: hidden; }
.lab::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: linear-gradient(90deg, var(--navy), var(--brand), var(--accent)); }
.lab .num { font-size: 12.5px; color: var(--brand); font-weight: 600; letter-spacing: .02em; }
.lab h3 { font: 600 19px/1.3 var(--serif); margin: 0; }
.lab p { margin: 0; color: var(--muted); font-size: 14px; }
.lab .foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-top: 8px; }
.lab .acts { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }
@media (max-width: 480px) { .lab .foot { flex-wrap: wrap; } .lab .acts { width: 100%; } .lab .acts .btn { flex: 1 1 0; } }
/* ---------- ish tasnifi: faqat o‘qish uchun oyna ---------- */
body.tsv-open { overflow: hidden; }
.tsv { position: fixed; inset: 0; z-index: 2000; display: flex; flex-direction: column; background: rgba(9, 18, 36, .94); -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; }
.tsv-bar { display: flex; align-items: center; gap: 10px; padding: 10px clamp(12px, 3vw, 32px); background: var(--panel); border-bottom: 1px solid var(--line); color: var(--ink); }
.tsv-t { flex: 1; min-width: 0; display: flex; flex-direction: column; line-height: 1.25; }
.tsv-t b { font-size: 12.5px; color: var(--brand); letter-spacing: .04em; text-transform: uppercase; }
.tsv-t span { font: 600 16px/1.3 var(--serif); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tsv-n { font-size: 14px; color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.tsv-b, .tsv-x { height: 40px; min-width: 40px; padding: 0 12px; border: 1px solid var(--line2); border-radius: 10px; background: var(--panel); color: var(--ink); font: 600 16px/1 var(--sans); cursor: pointer; }
.tsv-b:hover, .tsv-x:hover { background: var(--chip); }
.tsv-x { font-size: 14.5px; }
.tsv-b:focus-visible, .tsv-x:focus-visible, .tsv-s:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.tsv-s { flex: 1; overflow: auto; padding: clamp(10px, 2.5vw, 28px) clamp(8px, 2vw, 24px) 24px; -webkit-overflow-scrolling: touch; overscroll-behavior: contain; }
.tsv-p { --z: 1; }
.tsv-pg { display: block; width: calc(min(960px, 100%) * var(--z)); max-width: none; height: auto; margin: 0 auto 16px; background: #fff; border-radius: 4px; box-shadow: 0 6px 24px rgba(0, 0, 0, .35); pointer-events: none; }
.tsv-pg:not(.ok) { background: #fff linear-gradient(90deg, #f1f4f8 25%, #e6ebf2 50%, #f1f4f8 75%) 0 0 / 200% 100%; }
.tsv-ro { text-align: center; color: #aeb9cc; font-size: 13px; margin: 4px 0 0; }
@media (max-width: 560px) { .tsv-t b { display: none; } .tsv-n { display: none; } .tsv-x { padding: 0 10px; } }
@media print { body.tsv-open > * { display: none !important; } }
/* kurs sahifasidagi ish kartochkasi: tepada muallif rasmi, tagida nom va tugma */
.lab-grid { grid-template-columns: repeat(auto-fit, minmax(min(100%, 440px), 1fr)); gap: 22px; }
.lab-grid > .lab:only-child { max-width: 620px; }   /* bo‘limda bitta ish bo‘lsa, kartochka ekran bo‘ylab cho‘zilmaydi */
.lab.has-cover { padding: 0 0 20px; gap: 8px; }
.lab.has-cover::before { display: none; }
.lab.has-cover > :not(.lab-cover) { margin-left: 20px; margin-right: 20px; }
.lab-cover { display: block; width: 100%; height: auto; aspect-ratio: 1672 / 941; object-fit: cover; border-bottom: 1px solid var(--line); margin-bottom: 8px; background: var(--bg2); }
/* keng sahifalar (katalog, kurs sahifalari, administrator paneli — <body class="wide-page">): keng ekranda chetlar bo‘sh
   qolmasin — kontent va sarlavha qatori 1920 px gacha kengayadi, chetlar 16–48 px; undan katta ekranda markazda turadi.
   Kirish va ro‘yxatdan o‘tish sahifalari bunga kirmaydi. (body.wide-page .wrap .adm-page .wrap dan kuchliroq) */
body.wide-page .wrap, body.wide-page .top-in { max-width: 1920px; padding-left: clamp(16px, 3vw, 48px); padding-right: clamp(16px, 3vw, 48px); }
body.wide-page .lab-grid, body.wide-page .kurslar { gap: clamp(18px, 2vw, 32px); }
/* kirish sahifasi: keng ekranda kartochka sarlavha va footer chizig‘iga (1920 px gacha, chetlar 16–48 px) tekislanadi; 960 px dan tor — avvalgidek */
@media (min-width: 961px) { body[data-page="login"] .auth-wrap { max-width: 1920px; padding-left: clamp(16px, 3vw, 48px); padding-right: clamp(16px, 3vw, 48px); } }
.tag { font-size: 12.5px; font-weight: 600; padding: 5px 10px; border-radius: 999px; background: var(--chip); color: var(--muted); white-space: nowrap; }
.tag.started { color: var(--warn); background: color-mix(in srgb, var(--warn) 12%, transparent); }
.tag.done { color: var(--ok); background: color-mix(in srgb, var(--ok) 12%, transparent); }
.bar { height: 6px; border-radius: 6px; background: var(--chip); overflow: hidden; }
.bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--navy), var(--brand)); }
.empty { color: var(--muted); padding: 30px 0; text-align: center; }

/* ---------- administrator ---------- */
table.t { width: 100%; border-collapse: collapse; font-size: 14px; }
table.t th, table.t td { border-bottom: 1px solid var(--line); padding: 9px 8px; text-align: left; vertical-align: top; }
table.t th { color: var(--muted); font-weight: 600; font-size: 13px; }
/* jadvallar tor ekranda sahifani siljitmasin — o‘z blokida suriladi */
#actlist, #dbinfo { max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.codes { font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 14px; }
.stack { display: grid; gap: 18px; }
.inline { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }

/* ---------- footer ---------- */
.foot-site { color: var(--muted); font-size: 13.5px; text-align: center; padding: 22px 20px 28px; border-top: 1px solid var(--line); background: var(--panel); }

@media (max-width: 960px) {
  .auth-wrap, .auth-wrap.wide { grid-template-columns: minmax(0, 1fr); max-width: 560px; padding-top: 24px; gap: 20px; }
  .intro { min-height: 0; padding: 26px; }
  .intro ul { display: none; }
}
@media (max-width: 560px) {
  .top-in { padding: 8px 12px; min-height: 60px; gap: 8px; }
  .brand { gap: clamp(6px, 2vw, 10px); }
  /* kichik ekranda universitet nomi va logotip ekran kengligiga qarab kichrayadi — 320 px da ham to‘liq ko‘rinadi */
  .brand img { width: clamp(28px, 9vw, 36px); height: clamp(28px, 9vw, 36px); }
  .brand b { font-size: clamp(12.5px, 3.85vw, 15px); }
  .brand small { font-size: clamp(10.5px, 3.1vw, 12px); }
  .ctl { height: 38px; padding: 0 8px; }
  .ctl.icon { width: 38px; }
  .who { display: none; }
  .auth-wrap, .auth-wrap.wide { padding: 16px 12px 32px; }
  .intro { display: none; }
  .card { padding: 22px 18px; border-radius: 16px; }
  .row3, .row2 { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .grid { grid-template-columns: minmax(0, 1fr); }
  .wrap { padding: 20px 12px 40px; }
}
/* ---------- katalog: fan bo‘limlari ---------- */
.preview-note { margin-bottom: 18px; }
.subj { margin: 26px 0 0; }
.subj-h { display: flex; align-items: center; gap: 14px; margin: 0 0 14px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.subj-h h2 { font: 600 22px/1.2 var(--serif); margin: 0; color: var(--navy); }
:root[data-theme="dark"] .subj-h h2 { color: var(--ink); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .subj-h h2 { color: var(--ink); } }
.subj-n { font-size: 13px; color: var(--muted); }
.subj-ic { width: 46px; height: 46px; flex: none; border-radius: 14px; display: grid; place-items: center; color: #fff;
  background: linear-gradient(135deg, var(--navy), var(--brand)); box-shadow: 0 6px 16px rgba(11, 42, 91, .25); }
.subj-ic svg { width: 26px; height: 26px; }
.subj-nuclear .subj-ic { background: linear-gradient(135deg, #0f5c4d, #1a9c80); }
.subj-em .subj-ic { background: linear-gradient(135deg, #7a4a00, #d08b10); }
.subj-molecular .subj-ic { background: linear-gradient(135deg, #4b2a7a, #7a52c7); }
.soon { display: flex; gap: 16px; align-items: center; padding: 22px; border: 1.5px dashed var(--line2); border-radius: 16px; background: var(--panel); color: var(--muted); }
.soon b { color: var(--ink); font-size: 15.5px; }
.soon p { margin: 4px 0 0; font-size: 14px; }
.soon-ic { width: 40px; height: 40px; flex: none; color: var(--line2); }
.soon-ic svg { width: 40px; height: 40px; }

/* ---------- katalog: kurs kartochkalari (muallif rasmlari o‘zgarishsiz; tugma — haqiqiy havola) ---------- */
.kurslar { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; margin-top: 22px; }
.kurs { display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; box-shadow: var(--shadow); }
.kurs-img { display: block; width: 100%; height: auto; }
.kurs-f { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 14px 18px 16px; margin-top: auto; }
.kurs-n { font-size: 14px; color: var(--muted); }
.kurs-btn { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-width: 190px; min-height: 50px; padding: 0 26px;
  border-radius: 14px; background: linear-gradient(180deg, #0a4b90, #013f7e); color: #fff; font: 700 18px/1 var(--sans); text-decoration: none;
  box-shadow: 0 0 0 1.5px rgba(255, 255, 255, .55) inset, 0 6px 16px rgba(1, 45, 100, .28);
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease; -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
.kurs-btn svg { width: 11px; height: 18px; transition: transform .16s ease; }
.kurs-btn:hover, .kurs-btn:focus, .kurs-btn:visited, .kurs-btn:active { color: #fff; }
.kurs-btn:hover { background: linear-gradient(180deg, #1559a3, #064a8f); transform: translateY(-1px) scale(1.03); box-shadow: 0 0 0 1.5px rgba(255, 255, 255, .7) inset, 0 10px 22px rgba(1, 45, 100, .36); }
.kurs-btn:hover svg { transform: translateX(3px); }
.kurs-btn:active { transform: scale(.96); box-shadow: 0 0 0 1.5px rgba(255, 255, 255, .5) inset, 0 3px 8px rgba(1, 45, 100, .3); transition-duration: .06s; }
.kurs-btn:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.back { display: inline-block; margin: 0 0 14px; color: var(--brand); font-weight: 600; text-decoration: none; padding: 6px 0; }
.back:hover { text-decoration: underline; }
.kurs-hero { display: grid; grid-template-columns: minmax(0, 520px) minmax(0, 1fr); gap: 24px; align-items: center; margin-bottom: 24px; }
.kurs-hero-img { display: block; width: 100%; height: auto; border-radius: 16px; border: 1px solid var(--line); box-shadow: var(--shadow); }
.kurs-hero .kaf { color: var(--brand); font-size: 13px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.kurs-hero h1 { font: 600 34px/1.15 var(--serif); margin: 4px 0 8px; color: var(--navy); }
:root[data-theme="dark"] .kurs-hero h1 { color: var(--ink); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .kurs-hero h1 { color: var(--ink); } }
@media (prefers-reduced-motion: reduce) { .kurs-btn, .kurs-btn svg { transition: none; } .kurs-btn:hover, .kurs-btn:active { transform: none; } }
@media (max-width: 860px) {
  .kurslar { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .kurs-hero { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .kurs-hero h1 { font-size: 28px; }
}
@media (max-width: 480px) {
  .kurs-f { flex-direction: column; align-items: stretch; text-align: center; padding: 12px 14px 14px; }
  .kurs-btn { width: 100%; min-height: 52px; }
}

/* ---------- boshqaruv paneli ---------- */
.adm-page .wrap { max-width: 1320px; }
.adm-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.adm-head h1 { font: 600 clamp(26px, 3.4vw, 34px)/1.2 var(--serif); margin: 2px 0 0; color: var(--navy); }
.adm-head .kaf { color: var(--brand); font-size: 13px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
:root[data-theme="dark"] .adm-head h1 { color: var(--ink); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .adm-head h1 { color: var(--ink); } }
.tabs { display: flex; gap: 4px; flex-wrap: wrap; border-bottom: 1px solid var(--line); margin-bottom: 20px; }
.tabs button { border: 0; background: none; padding: 12px 16px; font: 600 14.5px var(--sans); color: var(--muted); cursor: pointer; border-bottom: 3px solid transparent; margin-bottom: -1px; }
.tabs button[aria-selected="true"] { color: var(--brand); border-bottom-color: var(--brand); }
.tabp h2 { font: 600 18px/1.3 var(--sans); margin: 0 0 12px; }
.tabp .card + .card, .tabp .cols2 + .card, .tabp .card + .cols2 { margin-top: 18px; }
.tabp .sec { margin-top: 6px; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; margin-bottom: 18px; }
.tile { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 16px 18px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 2px; border-top: 4px solid var(--line2); }
.tile b { font: 600 30px/1.1 var(--serif); color: var(--ink); }
.tile span { font-weight: 600; font-size: 14px; }
.tile small { color: var(--muted); font-size: 12.5px; }
.tile.t-blue { border-top-color: var(--brand); } .tile.t-green { border-top-color: var(--ok); } .tile.t-gold { border-top-color: #d6a21c; }
.cols2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; }
.chart .bars { display: flex; align-items: flex-end; gap: 6px; height: 160px; padding-top: 8px; }
.chart .cb { flex: 1; height: 100%; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 4px; }
.chart .cb i { display: block; width: 100%; min-height: 2px; border-radius: 6px 6px 0 0; background: linear-gradient(180deg, var(--accent), var(--brand)); }
.chart .cb span { font-size: 11px; color: var(--muted); }
.chart .cb b { font: 600 11.5px var(--sans); color: var(--ink); min-height: 14px; }
.cgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.cgrid .card { margin: 0 !important; }
.cgrid .card h3 { font: 600 15.5px/1.3 var(--sans); margin: 0 0 4px; }
.cgrid .card .sub { font-size: 12.5px; color: var(--muted); margin: 0 0 6px; min-height: 16px; }
.stsec { margin: 26px 0 12px !important; font: 600 20px/1.3 var(--serif) !important; }
.hbars { display: grid; gap: 7px; }
.hbars .hb { display: grid; grid-template-columns: minmax(0, 1fr) 150px 44px; gap: 8px; align-items: center; font-size: 13px; }
.hbars .hb em { font-style: normal; color: var(--ink); }
.hbars .hb i { display: block; height: 12px; border-radius: 6px; background: var(--bg2); position: relative; overflow: hidden; }
.hbars .hb i u { position: absolute; left: 0; top: 0; bottom: 0; background: linear-gradient(90deg, var(--brand), var(--accent)); border-radius: 6px; }
.hbars .hb b { text-align: right; font-weight: 600; }
.stat-line { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.note { padding: 14px 16px; border-radius: 12px; background: var(--chip); border-left: 4px solid var(--brand); font-size: 14px; margin-bottom: 14px; }
.toolbar { margin-bottom: 12px; align-items: center; }
.toolbar .inp { height: 40px; }
.toolbar .inp { width: auto; }
.toolbar select.inp { min-width: 200px; }
.toolbar input.inp { flex: 1 1 260px; }
.seg { display: inline-flex; border: 1px solid var(--line2); border-radius: 10px; overflow: hidden; }
.seg button { border: 0; background: var(--panel); color: var(--ink); padding: 0 14px; height: 38px; font: 500 14px var(--sans); cursor: pointer; }
.seg button + button { border-left: 1px solid var(--line2); }
.seg button.on { background: var(--navy); color: #fff; }
.labs-admin { display: grid; gap: 14px; }
.lab-row { display: grid; grid-template-columns: 220px minmax(0, 1fr) 200px; gap: 18px; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 16px; box-shadow: var(--shadow); }
.lab-row .thumb { aspect-ratio: 16 / 9; border-radius: 10px; overflow: hidden; background: var(--bg2); border: 1px solid var(--line); display: grid; place-items: center; color: var(--muted); font-size: 13px; }
.lab-row .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.lab-row h3 { font: 600 17px/1.3 var(--serif); margin: 6px 0 2px; }
.lab-badges { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.badge { display: inline-block; line-height: 1.5; font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 999px; background: var(--chip); color: var(--muted); white-space: nowrap; }
.badge.pub { background: color-mix(in srgb, var(--ok) 14%, transparent); color: var(--ok); }
.badge.hid { background: color-mix(in srgb, var(--warn) 14%, transparent); color: var(--warn); }
.facts { display: flex; flex-wrap: wrap; gap: 6px 22px; margin: 10px 0 8px; font-size: 13.5px; }
.facts dt { color: var(--muted); font-size: 12px; } .facts dd { margin: 0; }
.facts.col { flex-direction: column; }
.checks { display: flex; flex-wrap: wrap; gap: 6px 16px; align-items: center; font-size: 13.5px; }
.checks.big { font-size: 15px; margin: 12px 0; }
.st { font-weight: 600; } .st.ok { color: var(--ok); } .st.bad { color: var(--err); } .st.na { color: var(--muted); font-weight: 500; }
.lab-act { display: flex; flex-direction: column; gap: 8px; }
.errs pre, pre.errs { background: var(--bg2); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; font-size: 12px; white-space: pre-wrap; max-height: 160px; overflow: auto; }
.btn.danger { color: var(--err); border-color: color-mix(in srgb, var(--err) 40%, transparent); }
table.users td.acts { display: flex; flex-wrap: wrap; gap: 6px; }
table.users td.acts .btn.sm { height: 32px; padding: 0 10px; font-size: 13px; }
table.users td, table.users th { padding: 10px 12px; }
.chip { display: inline-block; font-size: 12px; padding: 3px 8px; border-radius: 999px; margin: 1px 0; }
.chip.done { background: color-mix(in srgb, var(--ok) 14%, transparent); color: var(--ok); }
.chip.started { background: color-mix(in srgb, var(--warn) 14%, transparent); color: var(--warn); }
.old-ids { margin-top: 18px; } .old-ids summary { cursor: pointer; }
.pages { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; margin-bottom: 18px; }
.page-card { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
.page-card > div:last-child { padding: 12px 14px 14px; }
.page-card h3 { font-size: 15.5px; margin: 0 0 2px; }
.page-card .pv { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg2); display: grid; place-items: center; border-bottom: 1px solid var(--line); }
.page-card .pv iframe { position: absolute; top: 0; left: 0; width: 1280px; height: 800px; border: 0; transform: scale(var(--s, .25)); transform-origin: 0 0; pointer-events: none; }
.swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 10px; }
.sw { display: grid; grid-template-columns: 40px 1fr; grid-template-rows: auto auto; column-gap: 10px; align-items: center; font-size: 13px; }
.sw i { grid-row: span 2; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--line); }
.sw code { color: var(--muted); font-size: 11.5px; }
.type-demo { display: grid; gap: 6px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); }
pre.tree { margin: 0; font: 500 13px/1.6 "IBM Plex Mono", ui-monospace, monospace; overflow-x: auto; white-space: pre; }
.dlg { width: min(1100px, 96vw); max-height: 92vh; border: 1px solid var(--line); border-radius: 16px; padding: 16px 18px; background: var(--panel); color: var(--ink); box-shadow: 0 20px 60px rgba(0, 0, 0, .35); }
.dlg::backdrop { background: rgba(5, 14, 31, .55); }
.dlg-h { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 10px; }
.frame16 { position: relative; aspect-ratio: 16 / 9; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #000; }
.frame16 iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
@media (max-width: 960px) {
  .cols2 { grid-template-columns: minmax(0, 1fr); }
  .lab-row { grid-template-columns: 160px minmax(0, 1fr); }
  .lab-act { grid-column: 1 / -1; flex-direction: row; flex-wrap: wrap; }
}
@media (max-width: 560px) {
  .lab-row { grid-template-columns: minmax(0, 1fr); }
  .tabs button { padding: 10px 10px; font-size: 13.5px; }
  .subj-h h2 { font-size: 19px; }
  .soon { padding: 16px; }
}

/* ---------- ro‘yxatdan o‘tish sahifasi: chapda 3D laboratoriya rasmi, o‘ngda forma (butun kenglik) ----------
   Rasm: /assets/lab-room.jpg — o‘zimiz yaratgan 3D sahna (scripts/lab-room-scene.html), 3840×2160. */
body.reg .top-in { max-width: none; }
body.reg .auth-wrap.wide { max-width: none; margin: 0; padding: 0; gap: 0; flex: 1; align-items: stretch;
  grid-template-columns: minmax(0, 1fr) minmax(0, 640px); }
body.reg .intro { border-radius: 0; min-height: calc(100vh - 69px); padding: clamp(32px, 5vh, 64px) clamp(28px, 5vw, 80px);
  background: linear-gradient(100deg, rgba(6, 22, 52, .90) 0%, rgba(11, 42, 91, .74) 34%, rgba(11, 42, 91, .28) 68%, rgba(11, 42, 91, .05) 100%),
    url("/assets/lab-room.jpg") center / cover no-repeat, linear-gradient(150deg, var(--navy) 0%, var(--navy2) 60%, #1c4fb8 130%); }
body.reg .intro::after { display: none; }
body.reg .intro h2 { font-size: clamp(30px, 3.4vw, 46px); max-width: 640px; text-shadow: 0 2px 12px rgba(0, 0, 0, .35); }
body.reg .intro p { max-width: 560px; font-size: 17px; text-shadow: 0 1px 6px rgba(0, 0, 0, .4); }
body.reg .intro li { text-shadow: 0 1px 4px rgba(0, 0, 0, .45); }
body.reg .intro li i { background: rgba(24, 140, 255, .55); }
body.reg .card { border-radius: 0; border: 0; border-left: 1px solid var(--line); box-shadow: none;
  padding: clamp(28px, 5vh, 56px) clamp(24px, 3.5vw, 56px); display: flex; flex-direction: column; justify-content: center; }
@media (max-width: 960px) {
  body.reg .auth-wrap.wide { grid-template-columns: minmax(0, 1fr); max-width: none; gap: 0; padding: 0; }
  body.reg .intro { min-height: 240px; display: flex; padding: 28px 24px; }
  body.reg .intro ul { display: none; }
  body.reg .card { border-left: 0; border-top: 1px solid var(--line); }
}
@media (max-width: 560px) {
  body.reg .intro { display: flex; min-height: 170px; padding: 20px 16px; }
  body.reg .intro h2 { font-size: 24px; margin: 8px 0 6px; }
  body.reg .intro p { font-size: 14px; }
  body.reg .card { padding: 22px 16px; }
}

/* ---------- kirish sahifasi: TerDU kampusi fon rasmi ----------
   Rasm: /assets/terdu-campus.png. Fayl bo‘lmasa, uning ostidagi to‘q ko‘k gradient ko‘rinadi (boshqa rasm ishlatilmaydi). */
body.photo { min-height: 100vh; min-height: 100dvh; position: relative; isolation: isolate; background: #0b1a33; }
body.photo::before { content: ""; position: fixed; inset: 0; z-index: -2;
  background: url("/assets/terdu-campus.png") center / cover no-repeat, linear-gradient(160deg, #0b2a5b 0%, #0a1c3d 55%, #071226 100%); }
body.photo::after { content: ""; position: fixed; inset: 0; z-index: -1;
  background: linear-gradient(90deg, rgba(5, 14, 31, .18) 0%, rgba(5, 14, 31, .38) 55%, rgba(5, 14, 31, .55) 100%), rgba(5, 14, 31, .22); }
body.photo .top { background: rgba(255, 255, 255, .80); border-bottom-color: rgba(255, 255, 255, .45);
  -webkit-backdrop-filter: saturate(1.4) blur(12px); backdrop-filter: saturate(1.4) blur(12px); }
.photo-wrap { flex: 1; grid-template-columns: minmax(0, 440px); justify-content: end; align-content: center; padding-top: 48px; padding-bottom: 56px; }
body.photo .card { background: rgba(255, 255, 255, .86); border-color: rgba(255, 255, 255, .65); border-radius: 20px;
  -webkit-backdrop-filter: saturate(1.3) blur(16px); backdrop-filter: saturate(1.3) blur(16px);
  box-shadow: 0 2px 6px rgba(3, 10, 24, .18), 0 24px 60px rgba(3, 10, 24, .35); }
body.photo .card .inp { background: rgba(255, 255, 255, .92); }
body.photo .foot-site { background: transparent; border-top-color: rgba(255, 255, 255, .18); color: rgba(255, 255, 255, .86); text-shadow: 0 1px 2px rgba(0, 0, 0, .5); }
:root[data-theme="dark"] body.photo .top { background: rgba(11, 18, 32, .72); border-bottom-color: rgba(255, 255, 255, .08); }
:root[data-theme="dark"] body.photo .card { background: rgba(17, 28, 48, .84); border-color: rgba(255, 255, 255, .10); }
:root[data-theme="dark"] body.photo .card .inp { background: rgba(11, 18, 32, .78); }
:root[data-theme="dark"] body.photo::after { background: rgba(3, 8, 18, .55); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body.photo .top { background: rgba(11, 18, 32, .72); border-bottom-color: rgba(255, 255, 255, .08); }
  :root:not([data-theme="light"]) body.photo .card { background: rgba(17, 28, 48, .84); border-color: rgba(255, 255, 255, .10); }
  :root:not([data-theme="light"]) body.photo .card .inp { background: rgba(11, 18, 32, .78); }
  :root:not([data-theme="light"]) body.photo::after { background: rgba(3, 8, 18, .55); }
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  body.photo .card { background: rgba(255, 255, 255, .95); }
  :root[data-theme="dark"] body.photo .card { background: rgba(17, 28, 48, .95); }
}
/* kirish sahifasi sarlavhasi: universitet nomi kattaroq va logotipga yaqinroq (logotip o‘lchami/joyi o‘zgarmaydi) */
body.photo .brand { gap: 2px; }
/* sarlavha: logotip va nom ekranning chap chetida, nom biroz kattaroq */
body.photo .top-in { max-width: none; }
/* kirish sahifasida sarlavha yopishqoq emas — sahifa aylantirilganda kirish kartochkasini yopib qo‘ymaydi */
body.photo .top { position: relative; }
body.photo .brand b { font-size: 22px; }
body.photo .brand small { font-size: 15px; }
/* kirish sahifasi pastki qismi: rangli, ma’lumotli (zamonaviy universitet saytlari uslubida) */
body.photo .foot-site.fs-rich { position: relative; text-align: left; padding: 0; border-top: 0; text-shadow: none; color: rgba(255, 255, 255, .9);
  background: linear-gradient(115deg, rgba(8, 31, 70, .93) 0%, rgba(20, 64, 150, .90) 55%, rgba(12, 104, 112, .88) 100%);
  -webkit-backdrop-filter: saturate(1.3) blur(10px); backdrop-filter: saturate(1.3) blur(10px); }
.fs-rich::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px; background: linear-gradient(90deg, #f5b700, #2fc4b2 45%, #5b8ef0); }
.fs-in { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr); gap: 28px 40px; padding: 30px 32px 22px; }
.fs-logo { display: flex; align-items: center; gap: 10px; }
.fs-logo img { width: 44px; height: 44px; flex: none; background: #fff; border-radius: 50%; padding: 2px; }
.fs-logo b { display: block; font: 600 18px/1.2 var(--serif); color: #fff; }
.fs-logo span { display: block; font-size: 13.5px; color: #9fd8ff; letter-spacing: .02em; }
.fs-brand p { margin: 12px 0 0; font-size: 14px; line-height: 1.55; color: rgba(255, 255, 255, .82); max-width: 460px; }
.fs-col h3 { margin: 4px 0 10px; font-size: 13px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: #f5c84c; }
.fs-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; font-size: 14px; }
.fs-col li { position: relative; padding-left: 16px; color: rgba(255, 255, 255, .88); }
.fs-col li::before { content: ""; position: absolute; left: 0; top: .62em; width: 6px; height: 6px; border-radius: 50%; background: #2fc4b2; }
.fs-col a { color: #fff; text-decoration: none; border-bottom: 1px solid rgba(255, 255, 255, .35); }
.fs-col a:hover, .fs-col a:focus-visible { border-bottom-color: #f5c84c; color: #ffe7a3; }
.fs-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 20px; padding: 12px 32px 16px; border-top: 1px solid rgba(255, 255, 255, .16);
  font-size: 13px; color: rgba(255, 255, 255, .75); }
.fs-site { color: #9fd8ff; }
:root[data-theme="dark"] body.photo .foot-site.fs-rich { background: linear-gradient(115deg, rgba(5, 14, 31, .94) 0%, rgba(12, 36, 86, .92) 55%, rgba(7, 62, 70, .90) 100%); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body.photo .foot-site.fs-rich { background: linear-gradient(115deg, rgba(5, 14, 31, .94) 0%, rgba(12, 36, 86, .92) 55%, rgba(7, 62, 70, .90) 100%); }
}
@media (max-width: 960px) {
  .fs-in { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); padding: 26px 22px 18px; }
  .fs-brand { grid-column: 1 / -1; }
  .fs-bottom { padding: 12px 22px 16px; }
}
@media (max-width: 560px) {
  .fs-in { grid-template-columns: minmax(0, 1fr); gap: 20px; padding: 22px 16px 14px; }
  .fs-bottom { flex-direction: column; padding: 12px 16px 16px; }
}
/* yozuv hech qachon "…" bilan kesilmaydi: joy yetmasa (masalan, rus tilida tor ekranda) ikkinchi qatorga o‘tadi */
body.photo .brand b, body.photo .brand small { white-space: normal; overflow: visible; text-overflow: clip; }
/* rus tilida nom uzunroq ("Термезский государственный университет") — o‘rta ekranlarda biroz kichikroq */
@media (max-width: 960px) { html[lang="ru"] body.photo .brand b { font-size: 16px; } html[lang="ru"] body.photo .brand small { font-size: 13px; } }
@media (max-width: 960px) {
  .photo-wrap { justify-content: center; grid-template-columns: minmax(0, 460px); max-width: none; }
  body.photo::after { background: rgba(5, 14, 31, .42); }
}
@media (max-width: 560px) {
  body.photo .brand { gap: 2px; }
  body.photo .brand b { font-size: clamp(12.5px, 4vw, 18px); }
  body.photo .brand small { font-size: clamp(10.5px, 3.25vw, 13px); }
  html[lang="ru"] body.photo .brand b { font-size: clamp(12px, 3.6vw, 15px); line-height: 1.15; }
  html[lang="ru"] body.photo .brand small { font-size: clamp(10.5px, 3vw, 12px); line-height: 1.2; }
  .photo-wrap { padding: 20px 12px 28px; align-content: start; }
  body.photo .card { padding: 22px 18px; }
}

@media print { body { display: none !important; } }