/* ===========================================================================
   Biologik Fizika - platformaga xos komponentlar
   Bosh sahifa, mashg'ulot matni, PDF o'qigich (sahifaga joylashgan),
   kalkulyatorlar, atamalar o'yini, taqdimot, baholash, o'qituvchi paneli.
   =========================================================================== */

/* --- Umumiy yordamchilar -------------------------------------------------- */

.footer-note {
  font-size: var(--fs-sm);
  color: var(--ink-400);
  line-height: 1.5;
}

.main-nav__mobile-only {
  display: none;
}

/* Menyuda 7 band + qidiruv + profil: bir qatorga sig'ishi uchun */
.main-nav__link {
  white-space: nowrap;
}

@media (max-width: 1480px) {
  .search-trigger {
    min-width: 0;
  }

  .search-trigger span,
  .search-trigger kbd {
    display: none;
  }
}

@media (max-width: 1240px) and (min-width: 901px) {
  .main-nav__link {
    padding-inline: 0.45rem;
    font-size: 0.8125rem;
  }

  .brand__text small {
    display: none;
  }
}

@media (max-width: 900px) {
  .main-nav.is-open .main-nav__mobile-only {
    display: block;
  }
}

@media (max-width: 480px) {
  .header-actions__register {
    display: none;
  }
}

.badge--amber {
  background: var(--amber-50);
  color: var(--amber-600);
}

.badge--coral {
  background: var(--coral-50);
  color: var(--coral-600);
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--ink-700);
  line-height: 1.4;
}

.icon-box {
  --m: var(--brand-600);
  --m-bg: var(--brand-50);
  width: 44px;
  height: 44px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--m-bg);
  color: var(--m);
}

.icon-box svg {
  width: 22px;
  height: 22px;
}

.icon-box--sm {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.icon-box--sm svg {
  width: 18px;
  height: 18px;
}

.kicker {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--brand-600);
}

.divider {
  height: 1px;
  background: var(--border);
  margin-block: var(--s-6);
}

.hide-mobile {
  display: initial;
}

@media (max-width: 640px) {
  .hide-mobile {
    display: none !important;
  }
}

/* --- Hero (biofizika) ----------------------------------------------------- */

.hero--bio {
  background:
    radial-gradient(1200px 520px at 85% -10%, rgba(29, 141, 220, 0.38), transparent 60%),
    linear-gradient(160deg, #06201f 0%, var(--brand-900) 38%, var(--brand-700) 78%, #0f6f8f 100%);
}

.hero--bio .hero__glow {
  background: radial-gradient(circle, rgba(109, 216, 201, 0.32), transparent 65%);
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 70% 40%, #000 20%, transparent 75%);
  pointer-events: none;
}

.hero--bio .hero__title em {
  background: linear-gradient(100deg, #6dd8c9, #9ad4fb);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero--bio .btn--primary {
  --btn-fg: var(--brand-800);
}

.hero__trust {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  margin-top: var(--s-6);
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.66);
  max-width: 56ch;
}

.hero__trust svg {
  flex: none;
}

.hero-float {
  animation: hero-float 8s ease-in-out infinite;
  transform-origin: center;
  transform-box: fill-box;
}

.hero-ecg {
  stroke-dasharray: 900;
  stroke-dashoffset: 900;
  animation: hero-ecg 3.6s cubic-bezier(0.6, 0.1, 0.3, 1) infinite;
}

.hero-dna {
  animation: hero-float 6s ease-in-out infinite reverse;
  transform-box: fill-box;
}

.hero-chip {
  animation: hero-float 7s ease-in-out infinite;
  transform-box: fill-box;
}

.hero-chip--2 {
  animation-delay: -2.4s;
}

.hero-chip--3 {
  animation-delay: -4.2s;
}

@keyframes hero-float {
  50% {
    transform: translateY(-8px);
  }
}

@keyframes hero-ecg {
  0% {
    stroke-dashoffset: 900;
  }
  55% {
    stroke-dashoffset: 0;
  }
  100% {
    stroke-dashoffset: -900;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-float,
  .hero-ecg,
  .hero-dna,
  .hero-chip {
    animation: none;
    stroke-dashoffset: 0;
  }
}

.stat-strip--5 {
  grid-template-columns: repeat(5, 1fr);
}

@media (max-width: 900px) {
  .stat-strip--5 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 560px) {
  .stat-strip--5 {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-strip--5 > :last-child {
    grid-column: 1 / -1;
  }
}

.stat-tile--plain {
  border: none !important;
  padding: var(--s-3) !important;
  background: transparent;
}

/* --- Bo'lim kartalari ------------------------------------------------------ */

.section-card--tall {
  min-height: 100%;
  gap: var(--s-4);
  padding: var(--s-6);
  border-top: 3px solid var(--sec);
}

.section-card__count {
  font-family: var(--font-display);
  font-size: var(--fs-3xl);
  font-weight: 800;
  line-height: 1;
  color: var(--sec);
  opacity: 0.9;
}

.section-card__topics {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  font-size: var(--fs-sm);
  color: var(--ink-600);
  border-top: 1px dashed var(--border);
  padding-top: var(--s-4);
}

.section-card__topics li {
  line-height: 1.5;
}

.section-card__cta {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--sec);
}

/* Fan bo'limlari (6 ma'ruza) */
.domain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-4);
}

.domain-card {
  --d: var(--brand-600);
  --d-bg: var(--brand-50);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  padding: var(--s-6);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.domain-card::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: var(--d-bg);
  opacity: 0.8;
  transition: transform var(--dur-slow) var(--ease-out);
}

.domain-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--d);
}

.domain-card:hover::after {
  transform: scale(1.25);
}

.domain-card > * {
  position: relative;
  z-index: 1;
}

.domain-card--2 { --d: var(--cyan-600); --d-bg: var(--cyan-50); }
.domain-card--3 { --d: var(--coral-600); --d-bg: var(--coral-50); }
.domain-card--4 { --d: var(--amber-600); --d-bg: var(--amber-50); }
.domain-card--5 { --d: var(--violet-600); --d-bg: var(--violet-100); }
.domain-card--6 { --d: #0e7490; --d-bg: #e6f6fa; }

.domain-card__icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--d-bg);
  color: var(--d);
  margin-bottom: var(--s-2);
}

.domain-card__label {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--d);
}

.domain-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-900);
}

@media (max-width: 900px) {
  .domain-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .domain-grid {
    grid-template-columns: 1fr;
  }
}

/* Platforma modullari (TZ tuzilmasi) */
.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-4);
}

.module-card {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding: var(--s-6);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.module-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--brand-200);
}

.module-card__icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--m-bg);
  color: var(--m);
}

.module-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--ink-900);
}

.module-card__items {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: 1.7;
}

@media (max-width: 900px) {
  .module-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .module-grid {
    grid-template-columns: 1fr;
  }
}

.role-row {
  display: flex;
  gap: var(--s-4);
  align-items: flex-start;
  padding: var(--s-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.role-row__icon {
  width: 42px;
  height: 42px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--m-bg);
  color: var(--m);
}

.role-row p {
  margin-top: 2px;
}

/* --- Mashg'ulot matni: kirish kartalari, formula, jadval ------------------- */

.lesson-intro {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-4);
}

.lesson-intro__card {
  padding: var(--s-5);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.lesson-intro__card--goal {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--brand-50), var(--cyan-50));
  border-color: var(--brand-100);
}

.lesson-intro__card--equipment {
  grid-column: 1 / -1;
}

.lesson-intro__card p {
  text-align: left !important;
}

.lesson-intro__title {
  font-family: var(--font-display);
  font-size: var(--fs-xs) !important;
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--brand-700);
  margin: 0 0 var(--s-3) !important;
  padding: 0 !important;
}

.intro-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}

.intro-list li {
  position: relative;
  padding-left: var(--s-5);
}

.intro-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-400);
}

.intro-list strong {
  color: var(--ink-900);
}

.chip-list--soft .chip {
  background: var(--surface);
}

@media (max-width: 720px) {
  .lesson-intro {
    grid-template-columns: 1fr;
  }
}

.lesson-keywords {
  padding: var(--s-5) var(--s-6);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.lesson-keywords .lesson-plan__title {
  color: var(--text-subtle);
}

.reader__content .formula {
  text-align: center !important;
  font-family: "Cambria Math", "Times New Roman", Georgia, serif;
  font-size: 1.18rem;
  font-style: italic;
  color: var(--ink-900);
  padding: var(--s-4) var(--s-5);
  background: linear-gradient(90deg, transparent, var(--brand-50) 18%, var(--brand-50) 82%, transparent);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  hyphens: none;
}

.reader__content .text-center {
  text-align: center !important;
}

.reader__content sub,
.reader__content sup {
  font-size: 0.72em;
  line-height: 0;
}

.lesson-caption,
.lesson-figure figcaption {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  text-align: center !important;
  line-height: 1.55;
}

.lesson-figure figcaption {
  margin-top: var(--s-3);
  padding-inline: var(--s-3);
}

.lesson-figure img {
  cursor: zoom-in;
  max-height: 520px;
  object-fit: contain;
}

.lesson-caption--table {
  text-align: left !important;
  font-weight: 600;
}

.lesson-table {
  margin-block: var(--s-6) !important;
}

.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
  line-height: 1.55;
}

.doc-table th,
.doc-table td {
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.doc-table thead th {
  background: var(--brand-50);
  color: var(--brand-800);
  font-weight: 700;
}

.doc-table thead th strong {
  font-weight: 700;
}

.doc-table tbody tr:nth-child(even) td {
  background: var(--surface-2);
}

.doc-table td:empty::after {
  content: "\00a0";
}

.lesson-list--ol {
  list-style: decimal;
}

.lesson-list--ul {
  list-style: disc;
}

.lesson-list li::marker {
  color: var(--brand-600);
  font-weight: 700;
}

.lesson-list .lesson-list {
  margin-top: var(--s-2);
}

.lesson-subheading {
  scroll-margin-top: calc(var(--header-h) + var(--s-6));
}

.reader__toc a.is-sub {
  padding-left: var(--s-6);
  font-size: 0.72rem;
}

/* Mashg'ulot ostidagi qo'shimcha bloklar */
.lesson-extras {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-4);
  margin-top: var(--s-5);
}

.lesson-extras > .card {
  margin: 0;
}

.extra-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}

.extra-link {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-3);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  color: var(--ink-700);
  transition: background var(--dur-fast) var(--ease);
}

.extra-link:hover {
  background: var(--surface-2);
  color: var(--ink-900);
}

.extra-link svg {
  flex: none;
  color: var(--brand-600);
}

.task-list {
  counter-reset: task;
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.task-list li {
  counter-increment: task;
  position: relative;
  padding: var(--s-3) var(--s-4) var(--s-3) calc(var(--s-4) + 30px);
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  line-height: 1.65;
}

.task-list li::before {
  content: counter(task);
  position: absolute;
  left: var(--s-3);
  top: var(--s-3);
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--amber-100);
  color: var(--amber-600);
  font-size: 0.72rem;
  font-weight: 700;
}

@media (max-width: 860px) {
  .lesson-extras {
    grid-template-columns: 1fr;
  }
}

/* Rasm kattalashtirish */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: grid;
  place-items: center;
  gap: var(--s-3);
  padding: var(--s-8);
  background: rgba(6, 18, 22, 0.9);
  animation: fade-in var(--dur) var(--ease);
}

.lightbox img {
  max-width: min(1100px, 100%);
  max-height: 80vh;
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-lg);
}

.lightbox__caption {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--fs-sm);
  text-align: center;
  max-width: 70ch;
}

.lightbox__close {
  position: absolute;
  top: var(--s-5);
  right: var(--s-5);
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

/* --- PDF o'qigich: sahifaga joylashgan hujjat ------------------------------ */

.docview {
  --page-gap: var(--s-5);
  position: relative;
  background: linear-gradient(180deg, var(--surface-2), var(--surface-3));
}

.docview__toolbar {
  position: sticky;
  top: var(--header-h-compact);
  z-index: 15;
  display: flex;
  align-items: center;
  gap: var(--s-2);
  flex-wrap: wrap;
  padding: var(--s-2) var(--s-4);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}

.docview__group {
  display: flex;
  align-items: center;
  gap: var(--s-1);
}

.docview__btn {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-xs);
  color: var(--ink-600);
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.docview__btn:hover:not(:disabled) {
  background: var(--surface-2);
  color: var(--ink-900);
}

.docview__btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.docview__btn svg {
  width: 18px;
  height: 18px;
}

.docview__page-input {
  width: 46px;
  padding: 0.3rem;
  text-align: center;
  font-size: var(--fs-xs);
  font-weight: 600;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xs);
  background: #fff;
}

.docview__count {
  font-size: var(--fs-xs);
  color: var(--text-subtle);
  white-space: nowrap;
  min-width: 34px;
}

.docview__search {
  display: flex;
  align-items: center;
  gap: var(--s-1);
  margin-left: auto;
}

.docview__search input {
  width: 180px;
  padding: 0.38rem 0.65rem;
  font-size: var(--fs-xs);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xs);
  background: #fff;
}

.docview__search input:focus {
  outline: none;
  border-color: var(--brand-500);
  box-shadow: 0 0 0 2px var(--brand-100);
}

.docview__pages {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--page-gap);
  padding: var(--s-6) var(--s-4) var(--s-8);
  overflow-x: auto;
}

.docview--scroll .docview__pages {
  max-height: min(82vh, 1100px);
  overflow-y: auto;
}

.docview__sheet {
  position: relative;
  flex: none;
  background: #fff;
  border-radius: 3px;
  box-shadow: 0 1px 2px rgba(12, 27, 36, 0.08), 0 8px 24px rgba(12, 27, 36, 0.08);
  overflow: hidden;
  scroll-margin-top: calc(var(--header-h-compact) + 70px);
}

.docview__placeholder {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(1.2px);
  opacity: 0.85;
  transition: opacity var(--dur-slow) var(--ease);
}

.docview__sheet.is-rendered .docview__placeholder {
  opacity: 0;
}

.docview__sheet canvas {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
}

.docview__num {
  position: absolute;
  right: 8px;
  bottom: 8px;
  z-index: 3;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(12, 27, 36, 0.62);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 600;
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.docview__sheet:hover .docview__num {
  opacity: 1;
}

.docview__text {
  position: absolute;
  inset: 0;
  z-index: 2;
  overflow: hidden;
  line-height: 1;
  opacity: 0.25;
}

.docview__text span {
  position: absolute;
  white-space: pre;
  transform-origin: 0 0;
  color: transparent;
  cursor: text;
}

.docview__text ::selection {
  background: var(--brand-400);
}

.docview__text .pdf-hit {
  background: var(--warning);
  border-radius: 2px;
}

.docview__text .pdf-hit--current {
  background: var(--cyan-400);
}

.docview__status {
  display: grid;
  place-content: center;
  justify-items: center;
  gap: var(--s-3);
  min-height: 320px;
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

.docview__progress {
  height: 3px;
  background: transparent;
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
}

.docview__progress span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--brand-500), var(--cyan-500));
  transition: width var(--dur) var(--ease);
}

.docview:fullscreen {
  overflow-y: auto;
  background: #2b3a42;
}

.docview:fullscreen .docview__toolbar {
  top: 0;
}

@media (max-width: 720px) {
  .docview__toolbar {
    padding: var(--s-2);
    top: var(--header-h-compact);
  }

  .docview__search {
    margin-left: 0;
    width: 100%;
  }

  .docview__search input {
    flex: 1;
    width: auto;
  }

  .docview__pages {
    padding: var(--s-4) var(--s-2) var(--s-6);
    gap: var(--s-3);
  }

  .docview__zoom-label,
  .docview__fit {
    display: none;
  }
}

/* Resurs kartalari (muqova bilan) */
.doc-card {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: var(--s-4);
  padding: var(--s-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.doc-card:hover {
  border-color: var(--brand-200);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.doc-card__cover {
  position: relative;
  display: block;
  aspect-ratio: 210 / 297;
  border-radius: var(--radius-xs);
  overflow: hidden;
  background: var(--surface-2);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.doc-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

.doc-card__cover--empty {
  display: grid;
  place-items: center;
  color: var(--brand-600);
  font-family: var(--font-display);
  font-weight: 800;
}

.doc-card__flag {
  position: absolute;
  left: 4px;
  bottom: 4px;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  background: var(--brand-600);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
}

.doc-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  min-width: 0;
}

.doc-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-900);
}

.doc-card__title a:hover {
  color: var(--brand-700);
}

.doc-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  font-size: var(--fs-xs);
  color: var(--text-subtle);
}

.doc-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin-top: auto;
  padding-top: var(--s-2);
}

/* --- Elektron resurslar ---------------------------------------------------- */

.link-section {
  scroll-margin-top: calc(var(--header-h) + var(--s-4));
  margin-bottom: var(--s-10);
}

.link-section__head {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  margin-bottom: var(--s-5);
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-4);
}

.link-card {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  padding: var(--s-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.link-card:hover {
  border-color: var(--brand-300);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.link-card__top {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.link-card__favicon {
  width: 36px;
  height: 36px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--brand-700);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-sm);
  text-transform: uppercase;
}

.link-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink-900);
  line-height: 1.35;
}

.link-card__domain {
  font-size: var(--fs-xs);
  color: var(--text-subtle);
}

.link-card__desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: 1.6;
}

.link-card__foot {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  margin-top: auto;
  padding-top: var(--s-2);
  font-size: var(--fs-xs);
  color: var(--brand-700);
  font-weight: 600;
}

.pill-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin-bottom: var(--s-8);
}

.pill-nav a,
.pill-nav button {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--ink-700);
  transition: all var(--dur-fast) var(--ease);
}

.pill-nav a:hover,
.pill-nav button:hover {
  border-color: var(--brand-300);
  color: var(--brand-700);
}

.pill-nav .is-active {
  background: var(--brand-600);
  border-color: var(--brand-600);
  color: #fff;
}

.pill-nav .is-active:hover {
  color: #fff;
}

@media (max-width: 1000px) {
  .link-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .link-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Hub kartalari (Interaktiv, Baholash) --------------------------------- */

.hub-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-5);
}

.hub-card {
  --h: var(--brand-600);
  --h-bg: var(--brand-50);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding: var(--s-6);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.hub-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--h);
}

.hub-card__icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--h-bg);
  color: var(--h);
}

.hub-card__icon svg {
  width: 26px;
  height: 26px;
}

.hub-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--ink-900);
  letter-spacing: var(--tracking-tight);
}

.hub-card__text {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: 1.7;
}

.hub-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  margin-top: auto;
  padding-top: var(--s-3);
  border-top: 1px dashed var(--border);
}

.hub-card__value {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--h);
  line-height: 1;
}

.hub-card__value small {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-subtle);
  margin-left: var(--s-1);
}

.hub-card__go {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--h);
}

@media (max-width: 760px) {
  .hub-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Kalkulyatorlar -------------------------------------------------------- */

.calc-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-4);
}

.calc-card {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding: var(--s-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.calc-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--brand-300);
}

.calc-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink-900);
  line-height: 1.4;
}

.calc-card__formula {
  font-family: "Cambria Math", "Times New Roman", Georgia, serif;
  font-style: italic;
  font-size: var(--fs-sm);
  color: var(--brand-800);
  padding: var(--s-2) var(--s-3);
  background: var(--brand-50);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  white-space: nowrap;
}

.calc-card__topic {
  margin-top: auto;
  font-size: var(--fs-xs);
  color: var(--text-subtle);
}

@media (max-width: 1000px) {
  .calc-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

.calc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: var(--s-6);
  align-items: start;
}

.calc-formula {
  font-family: "Cambria Math", "Times New Roman", Georgia, serif;
  font-style: italic;
  font-size: 1.28rem;
  color: var(--ink-900);
  padding: var(--s-5);
  text-align: center;
  background: linear-gradient(135deg, var(--brand-50), var(--cyan-50));
  border: 1px solid var(--brand-100);
  border-radius: var(--radius);
  overflow-x: auto;
  line-height: 1.8;
}

.calc-inputs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-4);
}

.calc-inputs .field--wide {
  grid-column: 1 / -1;
}

/* Indeksli yorliqlar (ρ_sh) balandroq - qatorlar tekis tursin */
.calc-inputs .field {
  margin: 0;
}

.calc-inputs .field__label {
  min-height: 2.5em;
  display: flex;
  align-items: flex-end;
  line-height: 1.3;
}

.calc-input {
  position: relative;
}

.calc-input .input {
  padding-right: 5.2rem;
}

.calc-input__unit {
  position: absolute;
  right: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-subtle);
  pointer-events: none;
  max-width: 4.6rem;
  text-align: right;
  line-height: 1.2;
}

.calc-results {
  position: sticky;
  top: calc(var(--header-h-compact) + var(--s-5));
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.calc-result {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-4);
  padding: var(--s-3) var(--s-4);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
}

.calc-result__label {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.calc-result__value {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink-900);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.calc-result__unit {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-subtle);
  margin-left: 4px;
}

.calc-result--primary {
  padding: var(--s-5);
  background: linear-gradient(135deg, var(--brand-700), var(--brand-600) 60%, var(--cyan-600));
  color: #fff;
}

.calc-result--primary .calc-result__label,
.calc-result--primary .calc-result__unit {
  color: rgba(255, 255, 255, 0.8);
}

.calc-result--primary .calc-result__value {
  color: #fff;
  font-size: var(--fs-2xl);
}

.calc-result--text {
  flex-direction: column;
  align-items: flex-start;
  gap: var(--s-1);
  background: var(--cyan-50);
}

.calc-result--text .calc-result__value {
  text-align: left;
  font-size: var(--fs-sm);
  color: var(--cyan-700);
}

.calc-error {
  color: var(--danger);
  font-size: var(--fs-sm);
}

@media (max-width: 900px) {
  .calc-layout {
    grid-template-columns: 1fr;
  }

  .calc-results {
    position: static;
  }
}

@media (max-width: 520px) {
  .calc-inputs {
    grid-template-columns: 1fr;
  }
}

/* --- Atamalar o'yini ------------------------------------------------------- */

.game-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
}

.flashcard-stage {
  display: grid;
  place-items: center;
  padding: var(--s-6) 0;
}

.flashcard {
  width: min(640px, 100%);
  height: 320px;
  perspective: 1400px;
  cursor: pointer;
}

.flashcard__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s var(--ease-out);
  transform-style: preserve-3d;
}

.flashcard.is-flipped .flashcard__inner {
  transform: rotateY(180deg);
}

.flashcard__face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-8);
  text-align: center;
  border-radius: var(--radius-xl);
  backface-visibility: hidden;
  box-shadow: var(--shadow-lg);
}

.flashcard__face--front {
  background: linear-gradient(145deg, var(--brand-800), var(--brand-600) 55%, var(--cyan-600));
  color: #fff;
}

.flashcard__face--back {
  background: var(--surface);
  border: 1px solid var(--border);
  transform: rotateY(180deg);
  overflow-y: auto;
}

.flashcard__term {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
}

.flashcard__hint {
  font-size: var(--fs-xs);
  opacity: 0.75;
}

.flashcard__def {
  font-size: var(--fs-md);
  line-height: 1.7;
  color: var(--ink-700);
}

.flashcard__topic {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--brand-600);
}

.game-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
}

.match-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-6);
}

.match-col {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.match-item {
  width: 100%;
  text-align: left;
  padding: var(--s-4);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  line-height: 1.55;
  color: var(--ink-700);
  transition: all var(--dur-fast) var(--ease);
}

.match-item--term {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink-900);
}

.match-item:hover:not(:disabled) {
  border-color: var(--brand-300);
}

.match-item.is-selected {
  border-color: var(--brand-600);
  background: var(--brand-50);
}

.match-item.is-matched {
  border-color: var(--success-border);
  background: var(--success-bg);
  color: #166534;
  cursor: default;
}

.match-item.is-wrong {
  border-color: var(--danger);
  background: var(--danger-bg);
  animation: shake 0.35s;
}

@keyframes shake {
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.quizgame-card {
  max-width: 760px;
  margin-inline: auto;
}

.quizgame-def {
  font-size: var(--fs-md);
  line-height: 1.75;
  color: var(--ink-800);
  padding: var(--s-5);
  background: var(--surface-2);
  border-radius: var(--radius);
  margin-bottom: var(--s-5);
}

.quizgame-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-3);
}

.quizgame-option {
  padding: var(--s-4);
  text-align: left;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-weight: 600;
  color: var(--ink-800);
  transition: all var(--dur-fast) var(--ease);
}

.quizgame-option:hover:not(:disabled) {
  border-color: var(--brand-400);
}

.quizgame-option.is-correct {
  border-color: var(--success);
  background: var(--success-bg);
}

.quizgame-option.is-wrong {
  border-color: var(--danger);
  background: var(--danger-bg);
}

.game-score {
  display: flex;
  gap: var(--s-4);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.game-score strong {
  color: var(--ink-900);
}

@media (max-width: 640px) {
  .match-board,
  .quizgame-options {
    grid-template-columns: 1fr;
  }

  .flashcard {
    height: 360px;
  }
}

/* --- Taqdimot (slaydlar) --------------------------------------------------- */

.deck {
  position: relative;
  background: #081b1d;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.deck__viewport {
  position: relative;
  aspect-ratio: 16 / 9;
  max-height: 78vh;
  margin-inline: auto;
  width: 100%;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: clamp(1.25rem, 4vw, 3.5rem);
  background:
    radial-gradient(900px 360px at 100% 0%, rgba(109, 216, 201, 0.12), transparent 60%),
    #ffffff;
  opacity: 0;
  visibility: hidden;
  transform: translateX(24px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease-out),
    visibility var(--dur-slow);
  overflow: hidden;
}

.slide.is-active {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.slide__kicker {
  font-family: var(--font-display);
  font-size: clamp(0.7rem, 1.2vw, 0.85rem);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--brand-600);
  margin-bottom: var(--s-2);
}

.slide__title {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 2rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--ink-900);
  letter-spacing: var(--tracking-tight);
  margin-bottom: clamp(0.75rem, 2vw, 1.5rem);
  padding-bottom: var(--s-3);
  border-bottom: 3px solid var(--brand-100);
}

.slide__body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  font-size: clamp(0.85rem, 1.55vw, 1.2rem);
  line-height: 1.65;
  color: var(--ink-700);
  padding-right: var(--s-2);
}

.slide__body > * + * {
  margin-top: 0.8em;
}

.slide__body .formula {
  font-family: "Cambria Math", "Times New Roman", serif;
  font-style: italic;
  text-align: center;
  font-size: 1.25em;
  color: var(--ink-900);
  padding: 0.4em;
  background: var(--brand-50);
  border-radius: var(--radius-sm);
}

.slide__body .lesson-list {
  padding-left: 1.3em;
}

.slide__body .chip-list {
  gap: 0.5em;
}

.slide__body .intro-list li::before {
  top: 0.68em;
}

.slide--media .slide__body {
  display: grid;
  place-items: center;
}

.slide--media figure {
  margin: 0;
  text-align: center;
  max-height: 100%;
}

.slide--media img {
  max-height: 52vh;
  max-width: 100%;
  margin-inline: auto;
  object-fit: contain;
}

.slide--media figcaption {
  font-size: 0.85em;
  color: var(--text-muted);
  margin-top: 0.6em;
}

.slide--title {
  justify-content: center;
  background: linear-gradient(150deg, #06201f, var(--brand-800) 55%, #0f6f8f);
  color: #fff;
}

.slide--title .slide__kicker {
  color: var(--brand-200);
}

.slide--title .slide__title {
  color: #fff;
  font-size: clamp(1.5rem, 4vw, 3rem);
  border-bottom-color: rgba(255, 255, 255, 0.18);
  max-width: 28ch;
}

.slide__meta {
  color: rgba(255, 255, 255, 0.72);
  font-size: clamp(0.8rem, 1.4vw, 1rem);
}

.slide__list {
  list-style: none;
  padding: 0;
  counter-reset: sl;
  display: flex;
  flex-direction: column;
  gap: 0.6em;
}

.slide__list li {
  counter-increment: sl;
  display: flex;
  gap: 0.8em;
  align-items: baseline;
}

.slide__list li::before {
  content: counter(sl);
  flex: none;
  width: 1.8em;
  height: 1.8em;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--brand-600);
  color: #fff;
  font-size: 0.75em;
  font-weight: 700;
}

.deck__bar {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-3) var(--s-4);
  background: #0c2427;
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--fs-sm);
}

.deck__bar .btn {
  --btn-bg: rgba(255, 255, 255, 0.08);
  --btn-fg: #fff;
  --btn-border: rgba(255, 255, 255, 0.16);
}

.deck__progress {
  flex: 1;
  height: 4px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
}

.deck__progress span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--brand-400), var(--cyan-400));
  transition: width var(--dur) var(--ease);
}

.deck:fullscreen {
  border-radius: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.deck:fullscreen .deck__viewport {
  max-height: calc(100vh - 60px);
  width: min(100vw, calc((100vh - 60px) * 16 / 9));
}

@media (max-width: 720px) {
  .deck__viewport {
    aspect-ratio: 3 / 4;
    max-height: none;
  }
}

/* --- Baholash -------------------------------------------------------------- */

.score-hero {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--s-8);
  align-items: center;
  padding: var(--s-8);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.score-grade {
  display: inline-flex;
  align-items: baseline;
  gap: var(--s-2);
  font-family: var(--font-display);
}

.score-grade__num {
  font-size: var(--fs-4xl);
  font-weight: 800;
  line-height: 1;
  color: var(--brand-700);
}

.score-grade__label {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--ink-700);
}

.component-list {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  margin-top: var(--s-5);
}

.component-row__head {
  display: flex;
  justify-content: space-between;
  gap: var(--s-3);
  font-size: var(--fs-sm);
  margin-bottom: var(--s-2);
}

.component-row__label {
  font-weight: 600;
  color: var(--ink-800);
}

.component-row__value {
  color: var(--text-muted);
  white-space: nowrap;
}

@media (max-width: 720px) {
  .score-hero {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
    padding: var(--s-6);
  }

  .score-hero .component-list {
    width: 100%;
    text-align: left;
  }
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: 600;
  white-space: nowrap;
}

.status-pill--new {
  background: var(--surface-2);
  color: var(--ink-500);
}

.status-pill--SUBMITTED {
  background: var(--cyan-50);
  color: var(--cyan-700);
}

.status-pill--REVIEWED {
  background: var(--success-bg);
  color: #166534;
}

.status-pill--RETURNED {
  background: var(--warning-bg);
  color: #92400e;
}

.work-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: var(--s-4);
  align-items: center;
  padding: var(--s-4) var(--s-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur) var(--ease);
}

a.work-row:hover {
  border-color: var(--brand-300);
  box-shadow: var(--shadow-sm);
}

.work-row__num {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--ink-600);
}

.work-row__title {
  font-weight: 600;
  color: var(--ink-900);
  line-height: 1.45;
}

.work-row__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-3);
  margin-top: 2px;
  font-size: var(--fs-xs);
  color: var(--text-subtle);
}

.work-row__side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--s-1);
}

@media (max-width: 640px) {
  .work-row {
    grid-template-columns: 38px minmax(0, 1fr);
  }

  .work-row__num {
    width: 38px;
    height: 38px;
  }

  .work-row__side {
    grid-column: 2;
    flex-direction: row;
    align-items: center;
  }
}

.case-scenario {
  font-size: var(--fs-md);
  line-height: 1.8;
  color: var(--ink-700);
}

.case-scenario p + p {
  margin-top: var(--s-4);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}

.data-table th,
.data-table td {
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.data-table th {
  width: 55%;
  font-weight: 500;
  color: var(--text-muted);
}

.data-table td {
  font-weight: 600;
  color: var(--ink-900);
}

.feedback-box {
  padding: var(--s-5);
  border-radius: var(--radius);
  background: var(--success-bg);
  border: 1px solid var(--success-border);
}

.feedback-box--RETURNED {
  background: var(--warning-bg);
  border-color: var(--warning-border);
}

.feedback-box--SUBMITTED {
  background: var(--cyan-50);
  border-color: var(--cyan-100);
}

.answer-block {
  padding: var(--s-4) var(--s-5);
  background: var(--surface-2);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  line-height: 1.7;
  white-space: pre-wrap;
}

.answer-block__q {
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: var(--s-2);
  white-space: normal;
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: var(--s-6);
  align-items: start;
}

.sticky-side {
  position: sticky;
  top: calc(var(--header-h-compact) + var(--s-5));
}

@media (max-width: 960px) {
  .two-col {
    grid-template-columns: 1fr;
  }

  .sticky-side {
    position: static;
  }
}

.portfolio-head {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  flex-wrap: wrap;
  padding: var(--s-6);
  background: linear-gradient(135deg, var(--brand-800), var(--brand-600) 60%, var(--cyan-600));
  color: #fff;
  border-radius: var(--radius-xl);
  margin-bottom: var(--s-8);
}

.portfolio-head .avatar--lg {
  border: 3px solid rgba(255, 255, 255, 0.35);
}

.portfolio-head__name {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 800;
}

.portfolio-head__meta {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--fs-sm);
}

.portfolio-head__score {
  margin-left: auto;
  text-align: right;
}

.portfolio-head__score strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-4xl);
  line-height: 1;
}

.mini-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--s-3);
}

.mini-stat {
  padding: var(--s-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.mini-stat__value {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--ink-900);
  line-height: 1.1;
}

.mini-stat__label {
  font-size: var(--fs-xs);
  color: var(--text-subtle);
  margin-top: 2px;
}

@media (max-width: 760px) {
  .mini-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* O'qituvchi paneli */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  align-items: center;
  margin-bottom: var(--s-4);
}

.filter-bar > .select {
  width: auto;
  min-width: 180px;
}

.filter-bar .glossary-search .input {
  width: 100%;
}

.table td .muted,
.table td .small {
  display: block;
}

.score-chip {
  display: inline-grid;
  place-items: center;
  min-width: 44px;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--fs-xs);
  background: var(--surface-2);
  color: var(--ink-700);
}

.score-chip--success { background: var(--success-bg); color: #166534; }
.score-chip--brand { background: var(--brand-50); color: var(--brand-700); }
.score-chip--warning { background: var(--warning-bg); color: #92400e; }

/* Fan dasturi */
.syllabus-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-3);
}

.syllabus-meta__item {
  padding: var(--s-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.syllabus-meta__label {
  font-size: var(--fs-xs);
  color: var(--text-subtle);
}

.syllabus-meta__value {
  font-weight: 600;
  color: var(--ink-900);
  margin-top: 2px;
  line-height: 1.45;
}

.load-bar {
  display: flex;
  height: 14px;
  border-radius: var(--radius-full);
  overflow: hidden;
  background: var(--surface-3);
}

.load-bar span {
  display: block;
  height: 100%;
}

.load-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-4);
  margin-top: var(--s-3);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.load-legend i {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  margin-right: 6px;
  vertical-align: baseline;
}

.toc-chips {
  position: sticky;
  top: var(--header-h-compact);
  z-index: 10;
  padding: var(--s-3) 0;
  background: rgba(246, 249, 249, 0.92);
  backdrop-filter: blur(8px);
  margin-bottom: var(--s-6);
}

@media (max-width: 900px) {
  .syllabus-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .syllabus-meta {
    grid-template-columns: 1fr;
  }
}

/* Xato sahifalari */
.error-page {
  display: grid;
  place-items: center;
  text-align: center;
  padding-block: var(--s-20);
}

.error-page__code {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 7rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--brand-600), var(--cyan-500));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Chop etish */
@media print {
  .site-header,
  .site-footer,
  .assistant,
  .toast-stack,
  .btn,
  .lesson-sidebar,
  .topic-nav,
  .docview__toolbar {
    display: none !important;
  }

  body {
    background: #fff;
  }
}

/* PDF.js matn qatlami (4.x) - belgilash, nusxalash va qidiruv uchun */
.textLayer {
  position: absolute;
  inset: 0;
  z-index: 2;
  overflow: clip;
  line-height: 1;
  text-align: initial;
  text-size-adjust: none;
  -webkit-text-size-adjust: none;
  forced-color-adjust: none;
  transform-origin: 0 0;
}

.textLayer :is(span, br) {
  position: absolute;
  color: transparent;
  white-space: pre;
  cursor: text;
  transform-origin: 0% 0%;
}

.textLayer span.markedContent {
  top: 0;
  height: 0;
}

.textLayer ::selection {
  background: rgba(20, 163, 148, 0.32);
}

.textLayer br::selection {
  background: transparent;
}

.textLayer .endOfContent {
  display: block;
  position: absolute;
  inset: 100% 0 0;
  z-index: 0;
  cursor: default;
  user-select: none;
}

.textLayer .pdf-hit {
  background: rgba(227, 138, 14, 0.42);
  border-radius: 2px;
}