/* ============================================================================
   EKOMARKAZ — SCREENS
   Sahifa tuzilishi (layout) va ekranga xos komponentlar.
   ============================================================================ */

/* ============================================================================
   APP SHELL
   ============================================================================ */
#app { display: flex; min-height: 100dvh; }

.sidebar {
  position: fixed; inset: 0 auto 0 0; z-index: var(--z-nav);
  width: var(--sidebar-w);
  display: flex; flex-direction: column;
  background: var(--surface);
  border-right: 1px solid var(--border);
}
.sb-head { padding: var(--sp-6) var(--sp-5) var(--sp-5); border-bottom: 1px solid var(--border); }
.sb-head .t1 {
  display: flex; align-items: center; gap: var(--sp-3);
  font-size: var(--fs-lg); font-weight: var(--fw-black);
  letter-spacing: var(--tr-head); color: var(--text);
}
.sb-head .t1 .mark {
  display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: var(--r-2);
  background: linear-gradient(140deg, var(--br-500), var(--br-700));
  color: #fff; flex: none;
  box-shadow: var(--sh-brand);
}
.sb-head .t2 {
  margin-top: var(--sp-3);
  font-size: var(--fs-2xs); color: var(--text-3); line-height: 1.55;
}

.nav {
  flex: 1; min-height: 0; overflow-y: auto;
  padding: var(--sp-4) var(--sp-3);
  display: flex; flex-direction: column; gap: 2px;
}
.nav .nav-group {
  margin: var(--sp-4) 0 var(--sp-2) var(--sp-3);
  font-size: 10.5px; font-weight: var(--fw-bold);
  text-transform: uppercase; letter-spacing: var(--tr-wide);
  color: var(--text-3);
}
.nav .nav-group:first-child { margin-top: 0; }
.nav a {
  position: relative;
  display: flex; align-items: center; gap: var(--sp-3);
  padding: 9px var(--sp-3);
  font-size: var(--fs-sm); font-weight: var(--fw-medium);
  color: var(--text-2);
  border-radius: var(--r-2);
  transition: color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}
.nav a .icon { width: 18px; height: 18px; opacity: .85; }
.nav a:hover { background: var(--surface-3); color: var(--text); }
.nav a.active {
  background: var(--brand-tint); color: var(--brand-lo); font-weight: var(--fw-semi);
}
.nav a.active .icon { opacity: 1; }
/* Faol bo'limning chap chekkasidagi belgi */
.nav a.active::before {
  content: '';
  position: absolute; left: -var(--sp-3); left: calc(var(--sp-3) * -1 + 3px);
  top: 50%; translate: 0 -50%;
  width: 3px; height: 18px; border-radius: var(--r-full);
  background: var(--brand);
}
[data-theme="dark"] .nav a.active { color: var(--br-300); }

.sb-user {
  padding: var(--sp-4) var(--sp-5);
  border-top: 1px solid var(--border);
  background: var(--surface-2);
}
.sb-user .nm { font-size: var(--fs-sm); font-weight: var(--fw-semi); }
.sb-user .rl {
  font-size: var(--fs-2xs); color: var(--text-3); line-height: 1.45;
  margin: 2px 0 var(--sp-3);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.app-col { flex: 1; min-width: 0; margin-left: var(--sidebar-w); display: flex; flex-direction: column; }

.app-header {
  position: sticky; top: 0; z-index: var(--z-sticky);
  height: var(--header-h);
  display: flex; align-items: center; justify-content: flex-end;
  gap: var(--sp-3);
  padding: 0 var(--sp-6);
  background: var(--glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border);
}
.header-tools { display: flex; align-items: center; gap: var(--sp-3); }
.theme-toggle {
  display: flex; align-items: center; gap: var(--sp-2);
  padding: 7px var(--sp-3);
  font-size: var(--fs-2xs); font-weight: var(--fw-semi);
  color: var(--text-2);
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: var(--r-2);
  transition: color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}
.theme-toggle:hover { color: var(--text); background: var(--border); }
.theme-toggle .icon { width: 15px; height: 15px; }

/* Barcha ekranlar butun kenglikni egallaydi — o'rtada siqilgan ustun keng
   monitorda yon tomonlarni bo'sh qoldiradi. */
.main {
  flex: 1;
  width: 100%;
  max-width: none;
  padding: var(--sp-7) clamp(var(--sp-6), 2.2vw, var(--sp-9)) var(--sp-11);
}

/* ---- O'QISH QULAYLIGI --------------------------------------------------
   Layout keng bo'lsa ham matn qatori cheklanadi: 1900px da bir qator 200
   belgiga cho'zilsa ko'z qator boshini yo'qotadi. ~90 belgi — qulay chegara. */
.main > .card > p,
.main > .card > ul,
.main > .card > .sub,
.dash-hero p,
.state p,
.q-item .qt,
.q-opt > span:last-child { max-width: 92ch; }

/* Sertifikat — bu bosiladigan hujjat, cho'zilmaydi */
#certPrintArea { max-width: 940px; margin-inline: auto; }

/* Natija ekrani markazda jamlangan holda qoladi */
.result-hero > * { max-width: 68ch; }

/* Mobil sarlavha paneli */
.mob-bar { display: none; }
.menu-toggle {
  display: grid; place-items: center;
  width: 38px; height: 38px;
  flex: none;              /* yonidagi elementlar tugmani siqib qo'ymasin */
  border-radius: var(--r-2);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}
.sb-backdrop { display: none; }

/* ============================================================================
   LOGIN
   ============================================================================ */
#loginScreen {
  position: relative; overflow: hidden;
  min-height: 100dvh;
  display: grid; place-items: center;
  padding: var(--sp-6);
  background:
    radial-gradient(1200px 640px at 10% -12%, #0D5F42 0%, transparent 58%),
    radial-gradient(940px 720px at 108% 112%, #0D3F63 0%, transparent 54%),
    linear-gradient(158deg, #061C16 0%, #082A1E 46%, #06222F 100%);
  background-size: 100% 100%, 100% 100%, 220% 220%;
  animation: fx-grad 20s var(--ease-in-out) infinite;
}
#loginScreen .orb {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: .5; pointer-events: none;
  will-change: transform;
}
#loginScreen .orb.o1 { width: 440px; height: 440px; left: -100px; top: -80px;  background: #13A96C; animation: fx-drift-a 24s var(--ease-in-out) infinite; }
#loginScreen .orb.o2 { width: 380px; height: 380px; right: -80px; bottom: -70px; background: #1F73C7; animation: fx-drift-b 28s var(--ease-in-out) infinite; }
#loginScreen .orb.o3 { width: 240px; height: 240px; right: 22%; top: 8%; background: #C88A0B; opacity: .2; animation: fx-drift-a 32s var(--ease-in-out) infinite reverse; }
/* Nozik to'r — chuqurlik hissi beradi */
#loginScreen::after {
  content: ''; position: absolute; inset: 0; pointer-events: none; opacity: .045;
  background-image: radial-gradient(#fff 1px, transparent 1px);
  background-size: 28px 28px;
}

.login-card {
  position: relative; z-index: 2;
  width: 448px; max-width: 100%;
  padding: var(--sp-8);
  /* Kontrast uchun deyarli xira: shisha effekt saqlanadi, lekin matn
     WCAG AA dan past tushmaydi (.72 da kulrang matn o'qilmay qolardi). */
  background: rgba(255, 255, 255, .95);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-brd);
  border-radius: var(--r-6);
  box-shadow: var(--sh-5);
  animation: fx-scale-in var(--dur-4) var(--ease-out) both;
}
[data-theme="dark"] .login-card { background: rgba(18,29,24,.95); }
.login-card::before {
  content: ''; position: absolute; top: 0; left: 28px; right: 28px; height: 3px;
  border-radius: 0 0 var(--r-1) var(--r-1);
  background: linear-gradient(90deg, var(--br-500), var(--ac-500), var(--am-500));
  background-size: 200% 100%;
  animation: fx-grad 7s var(--ease-linear) infinite;
}
.login-brand {
  display: flex; flex-direction: column; align-items: center; gap: var(--sp-3);
  margin-bottom: var(--sp-6);
}
.login-brand .mark {
  display: grid; place-items: center;
  width: 52px; height: 52px; border-radius: var(--r-4);
  background: linear-gradient(140deg, var(--br-500), var(--br-700));
  color: #fff; box-shadow: var(--sh-brand);
}
.login-card h1 {
  font-size: var(--fs-h3); text-align: center; font-weight: var(--fw-black);
  letter-spacing: var(--tr-head);
}
.login-card .sub { font-size: var(--fs-xs); color: var(--text-2); text-align: center; line-height: 1.5; }
.login-err {
  min-height: 20px; margin-top: var(--sp-3);
  font-size: var(--fs-xs); font-weight: var(--fw-medium);
  color: var(--danger); text-align: center;
}
.login-links {
  position: relative; z-index: 2;
  margin-top: var(--sp-6);
  display: flex; align-items: center; justify-content: center;
  gap: var(--sp-3); flex-wrap: wrap;
  font-size: var(--fs-xs);
  color: rgba(255,255,255,.7);
}
.login-links a { color: rgba(255,255,255,.92); font-weight: var(--fw-medium); }
.login-links a:hover { color: #fff; text-decoration: underline; text-underline-offset: 3px; }
#loginScreen .lang-seg {
  position: absolute; top: var(--sp-6); right: var(--sp-6); z-index: 2;
  background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.16);
}
#loginScreen .lang-seg button { color: rgba(255,255,255,.7); }
#loginScreen .lang-seg button.on { background: rgba(255,255,255,.94); color: var(--n-900); }

/* Login sahifasi doim yorug' kartochka ustida ishlaydi */
#loginScreen .field label { color: var(--text-2); }

/* ============================================================================
   LESSON PLAYER — chapda kurs dasturi, markazda video, o'ngda ma'lumot
   ============================================================================ */
.player {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: var(--sp-5);
  align-items: start;
}
.player-rail {
  position: sticky; top: calc(var(--header-h) + var(--sp-5));
  max-height: calc(100dvh - var(--header-h) - var(--sp-9));
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-4);
  overflow: hidden;
}
.player-rail .rail-head {
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.player-rail .rail-head .rt {
  font-size: var(--fs-2xs); font-weight: var(--fw-bold);
  text-transform: uppercase; letter-spacing: var(--tr-wide); color: var(--text-3);
}
.player-rail .rail-head .rp {
  margin-top: var(--sp-2); font-size: var(--fs-xs); color: var(--text-2);
}
.rail-list { flex: 1; min-height: 0; overflow-y: auto; padding: var(--sp-2); }
.rail-item {
  display: flex; align-items: center; gap: var(--sp-3);
  width: 100%; text-align: left;
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-2);
  font-size: var(--fs-xs);
  color: var(--text-2);
  transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}
.rail-item:hover:not(.is-locked) { background: var(--surface-3); color: var(--text); }
.rail-item.is-current { background: var(--brand-tint); color: var(--brand-lo); font-weight: var(--fw-semi); }
.rail-item.is-locked { opacity: .45; cursor: not-allowed; }
.rail-item .n {
  display: grid; place-items: center;
  width: 22px; height: 22px; flex: none;
  border-radius: var(--r-1);
  background: var(--surface-3);
  font-size: 11px; font-weight: var(--fw-bold); color: var(--text-3);
}
.rail-item.is-done .n { background: var(--brand); color: #fff; }
.rail-item.is-current .n { background: var(--brand); color: #fff; }
.rail-item .tx {
  flex: 1; min-width: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.rail-item .icon { width: 14px; height: 14px; opacity: .6; }

.player-main { min-width: 0; display: flex; flex-direction: column; gap: var(--sp-4); }
.player-side { min-width: 0; }
.player-side .tabs { margin-bottom: var(--sp-4); }

/* Keng monitorda uchinchi ustun: video haddan tashqari kattalashmasin,
   dars ma'lumoti/test/resurslar yonma-yon ko'rinsin. */
@media (min-width: 1500px) {
  .player-main {
    display: grid;
    grid-template-columns: minmax(0, 1fr) clamp(360px, 25vw, 460px);
    grid-template-rows: auto auto 1fr;
    gap: var(--sp-4) var(--sp-5);
    align-items: start;
  }
  #stageWrap    { grid-column: 1; grid-row: 1; }
  .lesson-head  { grid-column: 1; grid-row: 2; }
  .player-nav   { grid-column: 1; grid-row: 3; align-self: start; }
  .player-side  {
    grid-column: 2; grid-row: 1 / span 3;
    position: sticky; top: calc(var(--header-h) + var(--sp-5));
    max-height: calc(100dvh - var(--header-h) - var(--sp-9));
    overflow-y: auto;
  }
  .player-side .card { margin-bottom: 0; }
}

.video-stage {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--r-4);
  overflow: hidden;
  background: #05100C;
  box-shadow: var(--sh-3);
}
.video-stage iframe, .video-stage video { width: 100%; height: 100%; border: none; display: block; }

/* Demo "video" — haqiqiy fayl bo'lmaganda ishlaydigan simulyator */
.video-box {
  position: relative;
  aspect-ratio: 16 / 9;
  display: grid; place-content: center; justify-items: center; gap: var(--sp-4);
  padding: var(--sp-7);
  text-align: center;
  border-radius: var(--r-4);
  overflow: hidden;
  color: #E9F2ED;
  background:
    radial-gradient(680px 320px at 50% 0%, rgba(16,145,104,.30) 0%, transparent 62%),
    linear-gradient(165deg, #0A1A14 0%, #07130F 100%);
  box-shadow: var(--sh-3);
}
.video-box::before {
  content: ''; position: absolute; inset: 0; opacity: .5;
  background-image: linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 100% 3px;
  pointer-events: none;
}
.vb-title {
  font-size: var(--fs-h3); font-weight: var(--fw-bold);
  letter-spacing: var(--tr-head); max-width: 34ch;
}
.vb-time {
  font-family: var(--font-num);
  font-size: var(--fs-h1); font-weight: var(--fw-black);
  font-variant-numeric: tabular-nums;
  letter-spacing: var(--tr-head);
  color: #fff;
}
.vb-prog {
  position: absolute; left: 0; bottom: 0; height: 4px; width: 0;
  background: linear-gradient(90deg, var(--br-400), var(--br-300));
  box-shadow: 0 0 14px rgba(47,172,130,.8);
  transition: width 1s var(--ease-linear);
}
.video-box .btn { position: relative; z-index: 1; }

/* Dars tugallanganida — nozik, bir martalik tasdiq animatsiyasi */
.done-flash {
  position: absolute; inset: 0; z-index: 2;
  display: grid; place-items: center; gap: var(--sp-3);
  background: rgba(6,18,14,.72);
  backdrop-filter: blur(8px);
  animation: fx-fade var(--dur-3) var(--ease-out) both;
}
.done-flash .check {
  display: grid; place-items: center;
  width: 72px; height: 72px; border-radius: var(--r-full);
  background: var(--br-500); color: #fff;
  box-shadow: 0 0 0 12px rgba(16,145,104,.18);
  animation: fx-pop var(--dur-4) var(--ease-spring) both;
}
.done-flash .check .icon { width: 36px; height: 36px; stroke-width: 2.5;
  stroke-dasharray: 26; animation: fx-check var(--dur-4) var(--ease-out) both 180ms; }
.done-flash .lbl { color: #fff; font-weight: var(--fw-semi); font-size: var(--fs-lg); }

.lesson-meta {
  display: flex; align-items: center; gap: var(--sp-5); flex-wrap: wrap;
  font-size: var(--fs-xs); color: var(--text-3);
}
.lesson-meta span { display: inline-flex; align-items: center; gap: 6px; }

.player-nav { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3); }

/* Yon panel: eslatmalar / resurslar */
.tabs {
  display: flex; align-items: center; gap: 2px;
  padding: 3px; margin-bottom: var(--sp-4);
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: var(--r-2);
  width: fit-content;
}
.tabs button {
  padding: 7px var(--sp-4);
  font-size: var(--fs-xs); font-weight: var(--fw-semi);
  color: var(--text-3); border-radius: var(--r-1);
  transition: color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}
.tabs button:hover { color: var(--text); }
.tabs button.on { background: var(--surface); color: var(--text); box-shadow: var(--sh-1); }
.tab-panel { animation: fx-rise var(--dur-3) var(--ease-out) both; }

.res-item {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--r-2);
  margin-bottom: var(--sp-2);
  font-size: var(--fs-sm);
  transition: border-color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}
.res-item:hover { border-color: var(--border-strong); background: var(--surface-2); }
.res-item .icon { color: var(--text-3); }
.res-item .sz { margin-left: auto; font-size: var(--fs-2xs); color: var(--text-3); }

/* ============================================================================
   EXAM
   ============================================================================ */
.exam-top {
  position: sticky; top: 0; z-index: var(--z-sticky);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-4); flex-wrap: wrap;
  padding: var(--sp-4) var(--sp-5);
  margin-bottom: var(--sp-4);
  background: var(--glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--r-3);
  font-size: var(--fs-sm);
}
.exam-timer {
  font-family: var(--font-num);
  font-size: var(--fs-h3); font-weight: var(--fw-black);
  font-variant-numeric: tabular-nums; letter-spacing: 0;
  color: var(--text);
}
.exam-timer.urgent { color: var(--danger); animation: fx-pulse 1.1s var(--ease-in-out) infinite; }

/* Savol raqamlari bo'yicha navigatsiya */
.q-nav { display: flex; flex-wrap: wrap; gap: 6px; }
.q-nav button {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  font-size: var(--fs-2xs); font-weight: var(--fw-bold);
  color: var(--text-3);
  background: var(--surface-3);
  border: 1px solid transparent;
  border-radius: var(--r-1);
  transition: all var(--dur-1) var(--ease-out);
}
.q-nav button:hover { color: var(--text); border-color: var(--border-strong); }
.q-nav button.answered { background: var(--brand-tint); color: var(--brand-lo); border-color: color-mix(in oklab, var(--brand) 30%, transparent); }
.q-nav button.current { background: var(--brand); color: #fff; }

.exam-progress {
  height: 4px; border-radius: var(--r-full);
  background: var(--surface-3); overflow: hidden; margin-bottom: var(--sp-5);
}
.exam-progress > i {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--brand), var(--brand-hi));
  transition: width var(--dur-3) var(--ease-out);
}

/* Proktoring kamerasi */
.cam-box {
  position: fixed; right: var(--sp-5); bottom: var(--sp-5); z-index: var(--z-toast);
  width: 190px; border-radius: var(--r-3); overflow: hidden;
  background: #05100C;
  border: 1px solid var(--border-strong);
  box-shadow: var(--sh-4);
}
.cam-box video { width: 100%; display: block; }
.cam-box .cb-l {
  display: flex; align-items: center; gap: 6px;
  padding: 5px var(--sp-3);
  font-size: 10.5px; font-weight: var(--fw-bold);
  letter-spacing: var(--tr-wide); text-transform: uppercase;
  color: #fff; background: rgba(208,69,47,.92);
}
.cam-box .cb-l::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: #fff; animation: fx-pulse 1.4s var(--ease-in-out) infinite;
}

/* Chetlashtirish ekrani */
#lockScreen {
  position: fixed; inset: 0; z-index: var(--z-toast);
  display: grid; place-items: center; padding: var(--sp-5);
  background: rgba(6,18,14,.9);
  backdrop-filter: blur(10px);
}
.lk-card {
  width: 480px; max-width: 100%;
  padding: var(--sp-8);
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-5);
  box-shadow: var(--sh-5);
  animation: fx-scale-in var(--dur-3) var(--ease-out) both;
}
.lk-card .lk-ico {
  display: grid; place-items: center; margin: 0 auto var(--sp-4);
  width: 68px; height: 68px; border-radius: var(--r-full);
  background: var(--danger-tint); color: var(--danger);
  --ring-c: rgba(208,69,47,.35);
  animation: fx-ring 2.2s var(--ease-out) infinite;
}
.lk-card h2 { font-size: var(--fs-h3); margin-bottom: var(--sp-3); }
.lk-card p { font-size: var(--fs-sm); color: var(--text-2); }
.countdown-big {
  font-family: var(--font-num);
  font-size: clamp(2.5rem, 8vw, 3.5rem);
  font-weight: var(--fw-black);
  font-variant-numeric: tabular-nums;
  letter-spacing: var(--tr-head);
  color: var(--danger);
  margin: var(--sp-5) 0;
}

/* ============================================================================
   RESULT
   ============================================================================ */
.result-hero {
  position: relative; overflow: hidden;
  display: grid; place-items: center; gap: var(--sp-3);
  padding: var(--sp-10) var(--sp-6);
  text-align: center;
  border-radius: var(--r-5);
  border: 1px solid var(--border);
}
.result-hero.pass {
  background:
    radial-gradient(620px 300px at 50% -10%, var(--brand-tint) 0%, transparent 64%),
    var(--surface);
  border-color: color-mix(in oklab, var(--brand) 26%, transparent);
}
.result-hero.fail {
  background:
    radial-gradient(620px 300px at 50% -10%, var(--danger-tint) 0%, transparent 64%),
    var(--surface);
  border-color: color-mix(in oklab, var(--danger) 22%, transparent);
}
.result-hero .r-ico {
  display: grid; place-items: center;
  width: 78px; height: 78px; border-radius: var(--r-full);
  animation: fx-pop var(--dur-4) var(--ease-spring) both;
}
.result-hero.pass .r-ico { background: var(--brand); color: #fff; box-shadow: 0 0 0 14px var(--brand-tint); }
.result-hero.fail .r-ico { background: var(--danger); color: #fff; box-shadow: 0 0 0 14px var(--danger-tint); }
.result-hero .pct {
  font-size: clamp(3rem, 10vw, 4.5rem);
  font-weight: var(--fw-black);
  letter-spacing: var(--tr-display);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.result-hero.pass .pct { color: var(--brand-lo); }
.result-hero.fail .pct { color: var(--danger); }
[data-theme="dark"] .result-hero.pass .pct { color: var(--br-300); }

.result-grid {
  display: grid; gap: var(--sp-3);
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  margin-top: var(--sp-6);
}
.result-cell {
  padding: var(--sp-4);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-3);
  text-align: center;
}
.result-cell .rv { font-size: var(--fs-h3); font-weight: var(--fw-black); font-variant-numeric: tabular-nums; }
.result-cell .rl { font-size: var(--fs-2xs); color: var(--text-3); margin-top: 2px; }

/* ============================================================================
   CERTIFICATE
   ============================================================================ */
.cert {
  position: relative; overflow: hidden;
  padding: clamp(var(--sp-6), 5vw, var(--sp-10));
  text-align: center;
  color: #16211C;
  background:
    radial-gradient(700px 340px at 50% 0%, #F4FBF7 0%, transparent 60%),
    linear-gradient(168deg, #FEFEFC 0%, #F6FAF6 100%);
  border: 1px solid #DCE7DF;
  border-radius: var(--r-4);
  box-shadow: var(--sh-3);
}
/* Ikki qavatli klassik ramka */
.cert::before {
  content: ''; position: absolute; inset: 14px;
  border: 1px solid rgba(10,92,67,.24);
  border-radius: var(--r-2); pointer-events: none;
}
.cert::after {
  content: ''; position: absolute; inset: 19px;
  border: 3px double rgba(10,92,67,.30);
  border-radius: var(--r-1); pointer-events: none;
}
.cert > * { position: relative; z-index: 1; }
.c-gerb { display: grid; place-items: center; margin-bottom: var(--sp-4); }
.c-gerb .mark {
  display: grid; place-items: center;
  width: 56px; height: 56px; border-radius: var(--r-3);
  background: linear-gradient(140deg, #0B7554, #0A5C43);
  color: #fff;
}
.cert h2 {
  font-size: clamp(1.1rem, 3.4vw, 1.7rem);
  font-weight: var(--fw-black);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #0A5C43;
}
.c-sub { margin-top: var(--sp-3); font-size: var(--fs-2xs); color: #4E6259; line-height: 1.7; }
.c-name {
  margin: var(--sp-6) 0 var(--sp-2);
  font-size: clamp(1.5rem, 5vw, 2.4rem);
  font-weight: var(--fw-black);
  letter-spacing: var(--tr-head);
  color: #114780;
}
.c-course { margin: var(--sp-5) auto 0; max-width: 62ch; font-size: var(--fs-xs); line-height: 1.8; color: #24322C; }
.c-meta {
  display: grid; gap: var(--sp-4);
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  align-items: center;
  margin-top: var(--sp-8);
  padding-top: var(--sp-5);
  border-top: 1px solid rgba(10,92,67,.18);
  font-size: 11px; color: #4E6259;
}
.c-num { font-family: var(--font-num); font-weight: var(--fw-bold); color: #0A5C43; letter-spacing: .04em; }
.c-seal {
  display: grid; place-items: center; align-content: center;
  width: 86px; height: 86px; margin: 0 auto;
  border-radius: 50%;
  border: 2px solid rgba(10,92,67,.42);
  color: #0A5C43;
  font-size: 9px; font-weight: var(--fw-bold);
  letter-spacing: .08em; line-height: 1.5; text-transform: uppercase;
  transform: rotate(-9deg);
}
/* Sertifikat doim yorug' — qorong'i rejimda ham hujjat oq qog'oz bo'lib qoladi */
[data-theme="dark"] .cert { border-color: #2B3D33; }

.cert-actions { display: flex; gap: var(--sp-3); flex-wrap: wrap; margin-bottom: var(--sp-4); }

/* ============================================================================
   ADMIN / KONTENT PANEL
   ============================================================================ */
.admin-stats { margin-bottom: var(--sp-4); }
.admin-shell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-4);
  overflow: hidden;
}
.admin-tabs {
  display: flex; gap: 2px;
  /* overflow-x:auto bersak brauzer Y o'qini ham auto qiladi va faol tab
     tagidagi 1px chiziq tufayli keraksiz vertikal scrollbar chiqadi */
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  padding: var(--sp-2) var(--sp-3) 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.admin-tabs::-webkit-scrollbar { height: 0; width: 0; }
.admin-tabs button {
  position: relative;
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--fs-sm); font-weight: var(--fw-medium);
  color: var(--text-3);
  white-space: nowrap;
  border-radius: var(--r-2) var(--r-2) 0 0;
  transition: color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}
.admin-tabs button:hover { color: var(--text); background: var(--surface-3); }
.admin-tabs button.on { color: var(--brand-lo); font-weight: var(--fw-semi); background: var(--surface); }
.admin-tabs button.on::after {
  content: ''; position: absolute; left: var(--sp-3); right: var(--sp-3); bottom: 0;
  height: 2px; background: var(--brand); border-radius: var(--r-full);
}
[data-theme="dark"] .admin-tabs button.on { color: var(--br-300); }
.admin-tabs .count {
  display: grid; place-items: center;
  min-width: 18px; height: 18px; padding: 0 5px;
  border-radius: var(--r-full);
  background: var(--warn); color: #fff;
  font-size: 10.5px; font-weight: var(--fw-bold);
}
.admin-body { padding: var(--sp-5); animation: fx-rise var(--dur-3) var(--ease-out) both; }
.admin-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-4); flex-wrap: wrap; margin-bottom: var(--sp-4);
}
.admin-toolbar .hint { font-size: var(--fs-xs); color: var(--text-3); }
.admin-board { display: grid; gap: var(--sp-4); }
.admin-add { margin-top: var(--sp-5); padding-top: var(--sp-5); border-top: 1px solid var(--border); }
.cols { display: grid; gap: var(--sp-4); grid-template-columns: 1fr 1fr; }

/* ============================================================================
   DASHBOARD
   ============================================================================ */
.dash-hero {
  position: relative; overflow: hidden;
  padding: var(--sp-8);
  margin-bottom: var(--sp-5);
  border-radius: var(--r-5);
  border: 1px solid var(--border);
  background:
    radial-gradient(700px 320px at 88% -30%, var(--brand-tint) 0%, transparent 62%),
    radial-gradient(560px 300px at 4% 120%, var(--accent-tint) 0%, transparent 58%),
    var(--surface);
}
.dash-hero .eyebrow {
  font-size: var(--fs-2xs); font-weight: var(--fw-bold);
  text-transform: uppercase; letter-spacing: var(--tr-wide); color: var(--brand);
}
.dash-hero h2 {
  margin: var(--sp-2) 0 var(--sp-3);
  font-size: var(--fs-h1); letter-spacing: var(--tr-head);
}
.dash-hero p { font-size: var(--fs-sm); color: var(--text-2); max-width: 56ch; }
.dash-hero .hero-actions { display: flex; gap: var(--sp-3); flex-wrap: wrap; margin-top: var(--sp-6); }

.dash-split { display: grid; grid-template-columns: minmax(0,1.6fr) minmax(0,1fr); gap: var(--sp-4); }

/* Davom etish kartasi — dashboardning asosiy harakat nuqtasi */
.resume {
  display: flex; align-items: center; gap: var(--sp-5);
  padding: var(--sp-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-4);
  box-shadow: var(--sh-1);
}
.resume .thumb {
  position: relative;
  width: 128px; aspect-ratio: 16/10; flex: none;
  border-radius: var(--r-3); overflow: hidden;
  display: grid; place-items: center;
  background: linear-gradient(150deg, #0A1A14, #0C2A20);
  color: #5CC5A0;
}
.resume .thumb .icon { width: 28px; height: 28px; }
.resume .rb { flex: 1; min-width: 0; }
.resume .rb .k { font-size: var(--fs-2xs); color: var(--text-3); text-transform: uppercase; letter-spacing: var(--tr-wide); font-weight: var(--fw-bold); }
.resume .rb h4 { font-size: var(--fs-lg); margin: 5px 0 var(--sp-3); }

.milestones { display: flex; flex-direction: column; gap: var(--sp-3); }
.ms {
  display: flex; align-items: center; gap: var(--sp-3);
  font-size: var(--fs-sm);
}
.ms .dot {
  display: grid; place-items: center;
  width: 30px; height: 30px; border-radius: var(--r-full);
  background: var(--surface-3); color: var(--text-3); flex: none;
}
.ms.is-done .dot { background: var(--brand); color: #fff; }
.ms.is-done .mt { color: var(--text); }
.ms .mt { color: var(--text-3); }
.ms .mv { margin-left: auto; font-weight: var(--fw-semi); font-variant-numeric: tabular-nums; }

/* ============================================================================
   CONFETTI — faqat sertifikat va imtihondan o'tishda, bir marta
   ============================================================================ */
#confettiBox { position: fixed; inset: 0; pointer-events: none; z-index: var(--z-toast); overflow: hidden; }
.cf {
  position: absolute; top: -12px;
  width: 7px; height: 12px; border-radius: 1px;
  animation: cf-fall linear forwards;
  will-change: transform;
}
@keyframes cf-fall {
  to { transform: translate3d(0, 105vh, 0) rotate(680deg); opacity: 0; }
}

/* ============================================================================
   RESPONSIVE
   Mobil uchun tartib qayta o'ylangan — desktop shunchaki kichraytirilmagan.
   ============================================================================ */
@media (max-width: 1100px) {
  .player { grid-template-columns: 1fr; }
  .player-rail { position: static; max-height: 380px; order: 2; }
  .cols { grid-template-columns: 1fr; }
  .dash-split { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  :root { --sidebar-w: 280px; }

  .mob-bar {
    position: sticky; top: 0; z-index: var(--z-nav);
    display: flex; align-items: center; gap: var(--sp-3);
    height: 56px; padding: 0 var(--sp-4);
    background: var(--glass);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border);
  }
  .mob-brand { font-weight: var(--fw-black); letter-spacing: var(--tr-head); font-size: var(--fs-base); }
  .mob-bar .header-tools { margin-left: auto; }
  .app-header { display: none; }

  #app { flex-direction: column; }
  .app-col { margin-left: 0; }

  /* Yon menyu — chapdan siljib chiqadi */
  .sidebar {
    transform: translate3d(-100%, 0, 0);
    transition: transform var(--dur-3) var(--ease-out);
    box-shadow: var(--sh-5);
  }
  #app.menu-open .sidebar { transform: none; }
  .sb-backdrop {
    display: block;
    position: fixed; inset: 0; z-index: calc(var(--z-nav) - 1);
    background: var(--scrim);
    opacity: 0; pointer-events: none;
    transition: opacity var(--dur-3) var(--ease-out);
  }
  #app.menu-open .sb-backdrop { opacity: 1; pointer-events: auto; }

  .main { padding: var(--sp-5) var(--sp-4) var(--sp-10); }

  /* Chat: ro'yxat va suhbat bir vaqtda emas — navbat bilan */
  .chat-wrap { grid-template-columns: 1fr; height: calc(100dvh - 56px - var(--sp-9)); }
  .chat-wrap .chat-pane { display: none; }
  .chat-wrap.chat-mob-pane .chat-list { display: none; }
  .chat-wrap.chat-mob-pane .chat-pane { display: flex; }
  .chat-back { display: inline-flex; align-items: center; gap: 5px; font-size: var(--fs-xs); color: var(--text-2); font-weight: var(--fw-semi); }

  .exam-top { position: static; }
  .cam-box { width: 128px; right: var(--sp-3); bottom: var(--sp-3); }
}

@media (max-width: 640px) {
  /* Tor ekranda mavzu tugmasi faqat ikonka — matn menyu tugmasini siqib qo'yardi */
  .mob-bar .theme-lbl { display: none; }
  .mob-bar .theme-toggle { padding: 8px; }
  .mob-bar .header-tools { gap: var(--sp-2); }
  .mob-brand { flex: none; }
  .lang-seg button { padding: 5px 8px; min-width: 30px; }

  .card { padding: var(--sp-5); border-radius: var(--r-3); }
  .login-card { padding: var(--sp-6); }
  .dash-hero { padding: var(--sp-6); }
  .v-card, .modal-card { padding: var(--sp-5); border-radius: var(--r-4); }
  .grid3 { grid-template-columns: 1fr; }
  .resume { flex-direction: column; align-items: stretch; }
  .resume .thumb { width: 100%; aspect-ratio: 16/7; }
  .c-meta { grid-template-columns: 1fr 1fr; text-align: center; }
  .msg { max-width: 88%; }
  /* Mobil videoda boshqaruv qulay bo'lishi uchun to'liq kenglik */
  .video-stage, .video-box { border-radius: var(--r-3); }
  .btn { padding: 11px var(--sp-4); }
  .topbar { margin-bottom: var(--sp-5); }
}