/* TENOV Platform — bank.tenov.ru design system */

/* ---- Token overrides ---- */
:root,
[data-theme="dark"],
[data-theme="light"] {
  --color-primary: #0f4c81;
  --color-primary-light: #4a8fc9;
  --color-primary-hover: #0d4270;
  --color-surface2: var(--color-surface-2);
  --font-body: 'Montserrat', sans-serif;
  --transition: 0.18s ease;
  --transition-slow: 0.32s cubic-bezier(.4, 0, .2, 1);
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 10px;
  --radius-full: 9999px;
  --text-xs: .72rem;
  --text-sm: .82rem;
  --text-base: .92rem;
  --text-lg: 1.05rem;
  --text-xl: 1.2rem;
  --text-2xl: 1.5rem;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --topbar-control-height: 36px;
  --glow-primary-rgb: 15, 76, 129;
  --glow-secondary-rgb: 15, 76, 129;
  --color-gradient: #0f4c81;
  --color-gradient-raw-start: #0f4c81;
  --color-gradient-raw-end: #0f4c81;
}

[data-theme="light"] {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-surface-2: #eef0f2;
  --color-surface2: #eef0f2;
  --color-border: rgba(0, 0, 0, 0.08);
  --color-divider: rgba(0, 0, 0, 0.06);
  --color-text: #1a1c2e;
  --color-text-muted: rgba(26, 28, 46, 0.55);
  --color-text-faint: rgba(26, 28, 46, 0.32);
  --card-bg-from: #ffffff;
  --card-bg-to: #ffffff;
}

[data-theme="dark"] {
  --color-bg: #000000;
  --color-surface: #0c0c0e;
  --color-surface-2: #141418;
  --color-surface2: #141418;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-divider: rgba(255, 255, 255, 0.06);
  --color-text: #f4f6fb;
  --color-text-muted: rgba(244, 246, 251, 0.55);
  --color-text-faint: rgba(244, 246, 251, 0.3);
  --card-bg-from: rgba(20, 20, 24, 0.92);
  --card-bg-to: rgba(12, 12, 14, 0.92);
}

/* ---- Platform layout (topbar, как в банке заданий) ---- */
body.platform-layout,
body.lesson-page {
  font-family: var(--font-body);
  font-size: var(--text-base);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  min-height: 100dvh;
  transition: background var(--transition-slow), color var(--transition-slow);
}

.platform-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

/* ===== TOPBAR ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  overflow: visible;
}

[data-theme="dark"] .topbar {
  background: var(--color-bg);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-8);
  min-height: 52px;
}

.topbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0;
  border: none;
  background: transparent;
  text-decoration: none;
  overflow: visible;
  flex-shrink: 0;
  height: var(--topbar-control-height);
  cursor: pointer;
  font: inherit;
  color: inherit;
  text-align: left;
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.topbar-nav::-webkit-scrollbar { display: none; }

.topnav-item {
  display: inline-flex;
  align-items: center;
  height: var(--topbar-control-height);
  padding: 0 14px;
  border: none;
  background: transparent;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--color-text-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
  text-decoration: none;
}

.topnav-item:hover {
  background: rgba(15, 76, 129, 0.08);
  color: var(--color-primary);
}

.topnav-item.active {
  background: rgba(15, 76, 129, 0.13);
  color: var(--color-primary);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  margin-left: auto;
}

.topbar-bank {
  text-decoration: none;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  height: var(--topbar-control-height);
  padding: 0 18px;
  font-size: var(--text-xs);
  font-weight: 700;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  letter-spacing: .04em;
  cursor: pointer;
  flex-shrink: 0;
  text-transform: uppercase;
}

.topbar-bank:hover { opacity: .88; }

.topbar-profile-wrap {
  position: relative;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.topbar-profile {
  display: flex;
  align-items: center;
  cursor: pointer;
  border-radius: var(--radius-md);
  padding: 2px;
  transition: background var(--transition);
}

.topbar-profile:hover { background: rgba(15, 76, 129, 0.06); }

.profile-avatar {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  flex-shrink: 0;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 700;
  color: #fff;
  overflow: hidden;
}

.profile-avatar img,
.pp-avatar img {
  width: 100%;
  height: 100%;
  display: block;
}

.profile-avatar.avatar-fit-cover img,
.pp-avatar.avatar-fit-cover img { object-fit: cover; }

.profile-avatar.avatar-fit-contain img,
.pp-avatar.avatar-fit-contain img { object-fit: contain; }

.profile-popup {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  left: auto;
  width: 260px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  z-index: 200;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  display: none;
  box-sizing: border-box;
}

.profile-popup.open { display: block; }

.pp-avatar {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  font-weight: 700;
  color: #fff;
  margin: 0 auto var(--space-3);
  overflow: hidden;
}

.pp-name {
  font-size: var(--text-base);
  font-weight: 700;
  text-align: center;
  color: var(--color-text);
  margin-bottom: 2px;
}

.pp-meta {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: var(--space-4);
}

.pp-actions {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.profile-popup .pp-btn {
  display: block;
  width: 100%;
  box-sizing: border-box;
  padding: 7px 12px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: .04em;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.profile-popup .pp-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(15, 76, 129, 0.06);
}

.profile-popup .pp-btn.danger {
  border-color: rgba(218, 93, 93, 0.3);
  color: #da5d5d;
}

.profile-popup .pp-btn.danger:hover {
  border-color: #da5d5d;
  background: rgba(218, 93, 93, 0.06);
}

/* ===== PAGE CONTENT ===== */
.page-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
}

.brand-emblem {
  display: block;
  height: var(--topbar-control-height);
  width: auto;
  flex-shrink: 0;
  pointer-events: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1px;
}

.brand-wordmark {
  font-weight: 800;
  font-size: 22px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-text);
  white-space: nowrap;
}

.brand-tagline {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--color-text-muted);
  line-height: 1.1;
}

/* Icon-only theme switcher */
.theme-switcher {
  display: flex;
  align-items: center;
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 2px;
  height: var(--topbar-control-height);
}

.theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.theme-btn.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.theme-btn:hover:not(.active) { color: var(--color-text); }

/* ===== CABINET ===== */
.cabinet-main {
  padding: var(--space-6) var(--space-8) var(--space-10);
}

.cabinet-section { margin-bottom: var(--space-6); }
.cabinet-section:last-child { margin-bottom: 0; }

.cabinet-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6) var(--space-6);
}

[data-theme="light"] .cabinet-panel {
  box-shadow: 0 4px 20px rgba(15, 76, 129, 0.08);
}

.cabinet-panel-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.cabinet-panel-mark {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.cabinet-panel-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: rgba(15, 76, 129, 0.08);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cabinet-panel-icon--special {
  background: rgba(15, 76, 129, 0.10);
  color: var(--color-primary-light);
}

.cabinet-heading {
  font-size: var(--text-base);
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin: 0;
  color: var(--color-text);
}

.cabinet-panel-meta {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: lowercase;
  white-space: nowrap;
}

.cabinet-panel-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.cabinet-add-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 32px;
  padding: 0 12px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(15, 76, 129, 0.25);
  background: rgba(15, 76, 129, 0.06);
  color: var(--color-primary);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: lowercase;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.cabinet-add-btn:hover {
  background: rgba(15, 76, 129, 0.12);
  border-color: rgba(15, 76, 129, 0.4);
}

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

.course-card {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.course-card:hover {
  transform: translateY(-2px);
  border-color: rgba(15, 76, 129, 0.35);
  box-shadow: 0 8px 28px rgba(15, 76, 129, 0.12);
}

[data-theme="light"] .course-card.card {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.06);
  box-shadow: 0 2px 12px rgba(15, 76, 129, 0.07);
}

[data-theme="light"] .course-card.card:hover {
  border-color: rgba(15, 76, 129, 0.2);
  box-shadow: 0 6px 24px rgba(15, 76, 129, 0.15);
}

[data-theme="light"] .course-card::after {
  background: radial-gradient(circle, rgba(15, 76, 129, 0.1), transparent 65%);
}

.course-card::after {
  content: "";
  position: absolute;
  inset: auto -60px -60px auto;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(15, 76, 129, 0.28), transparent 65%);
  pointer-events: none;
}

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

.course-card h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  max-width: none;
  text-transform: uppercase;
}

.course-card p,
.course-card .chip,
.course-card .progress-label-row span {
  text-transform: lowercase;
}

.course-card > p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.5;
  max-width: 52ch;
}

.course-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.course-card .chip {
  padding: 3px 10px;
  font-size: var(--text-xs);
  border-radius: var(--radius-xl);
}

/* Shop */
.shop-empty {
  padding: var(--space-8) var(--space-6);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-transform: lowercase;
  line-height: 1.55;
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: #fff;
  pointer-events: none;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .25s, transform .25s;
  max-width: 320px;
}

.toast.show { opacity: 1; transform: translateY(0); }
.toast.info { background: rgba(15, 76, 129, 0.95); }

/* ===== COURSE PAGE ===== */
.course-main { padding: var(--space-6) var(--space-8) var(--space-10); }

.course-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: var(--space-8);
  align-items: start;
}

.course-hero {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-6);
  position: relative;
  overflow: hidden;
}

[data-theme="light"] .course-hero {
  box-shadow: 0 4px 20px rgba(15, 76, 129, 0.08);
}

.course-hero::after {
  content: "";
  position: absolute;
  inset: auto -60px -60px auto;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(15, 76, 129, 0.12), transparent 65%);
  pointer-events: none;
}

.course-hero-inner { position: relative; z-index: 1; }

.course-hero h1 {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: var(--space-4) 0;
  text-transform: uppercase;
}

.course-hero p {
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-5);
  text-transform: lowercase;
}

.course-hero .course-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.course-hero .course-chips .chip {
  font-size: var(--text-xs);
  text-transform: lowercase;
}

.modules-heading {
  font-size: var(--text-base);
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}

.module-group { margin-bottom: var(--space-4); }

.module-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: border-color var(--transition);
}

.module-header:hover { border-color: rgba(15, 76, 129, 0.35); }

.module-title-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-width: 0;
}

.module-num,
.module-num.done,
.module-num.current {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  display: grid;
  place-items: center;
  font-size: var(--text-sm);
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.module-title h3 {
  font-size: var(--text-sm);
  font-weight: 700;
  margin-bottom: 2px;
  text-transform: uppercase;
}

.module-title span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: lowercase;
}

.module-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.module-progress {
  width: 72px;
  height: 6px;
  border-radius: var(--radius-full);
  background: rgba(15, 76, 129, 0.1);
  overflow: hidden;
}

.module-progress > span {
  display: block;
  height: 100%;
  background: var(--color-primary);
}

.module-chevron {
  color: var(--color-text-faint);
  transition: transform var(--transition);
}

.module-group.open .module-chevron { transform: rotate(180deg); }

.lessons-inner {
  display: none;
  gap: var(--space-2);
  padding: var(--space-3) 0 var(--space-2) var(--space-4);
}

.module-group.open .lessons-inner { display: grid; }

.lesson-row {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition), transform var(--transition);
}

.lesson-row:hover {
  border-color: rgba(15, 76, 129, 0.3);
  transform: translateX(2px);
}

.lesson-row.active {
  border-color: var(--color-primary);
}

.lesson-row.done .lesson-thumb-sm::before {
  content: "✓";
  color: #fff;
}

.lesson-thumb-sm {
  aspect-ratio: 16/10;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  display: grid;
  place-items: center;
  font-size: 0.75rem;
}

.lesson-thumb-sm::before {
  content: "▶";
  color: #fff;
}

.lesson-row-info h5 {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: 2px;
  text-transform: lowercase;
}

.lesson-row-info span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: lowercase;
}

.lesson-duration {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  white-space: nowrap;
}

.course-sidebar { position: sticky; top: var(--space-4); }

.next-lesson-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid rgba(15, 76, 129, 0.25);
  border-radius: var(--radius-xl);
}

[data-theme="light"] .next-lesson-card {
  box-shadow: 0 4px 20px rgba(15, 76, 129, 0.08);
}

.next-lesson-card .eyebrow { margin-bottom: var(--space-4); }

.next-lesson-card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-2);
  text-transform: uppercase;
}

.next-lesson-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-5);
  text-transform: lowercase;
}

.empty-modules {
  padding: var(--space-6);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ===== LESSON PAGE ===== */
.lesson-subbar {
  flex-shrink: 0;
  padding: var(--space-3) var(--space-8);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.lesson-subbar .lesson-breadcrumb {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  text-transform: lowercase;
}

.lesson-subbar .lesson-breadcrumb strong {
  color: var(--color-text);
  font-weight: 600;
}

.breadcrumb-sep { color: var(--color-text-faint); }

.back-link {
  display: inline-flex;
  align-items: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-transform: lowercase;
  text-decoration: none;
}

.back-link:hover { color: var(--color-text); }

.lesson-layout {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-8);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: var(--space-8);
  align-items: start;
  justify-items: stretch;
}

.lesson-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  width: 100%;
  min-width: 0;
  max-width: 100%;
}

.video-player {
  position: relative;
  width: 100%;
  flex: none;
}

/* Высота только от ширины колонки (56.25% = 16:9), без aspect-ratio в grid */
.video-sizer {
  display: block;
  width: 100%;
  padding-top: 56.25%;
  pointer-events: none;
}

.video-frame {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: #000;
  border: 1px solid var(--color-border);
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  border: none;
  display: block;
}

.video-placeholder {
  position: absolute;
  inset: 0;
  background: var(--color-primary);
  display: grid;
  place-items: center;
}

.video-play-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  cursor: pointer;
  color: white;
}

.video-label {
  position: absolute;
  bottom: var(--space-4);
  left: var(--space-4);
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
}

.lesson-meta-bar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-6);
  flex-wrap: wrap;
  min-width: 0;
  max-width: 100%;
}

.lesson-title-block {
  min-width: 0;
  flex: 1 1 12rem;
}

.lesson-title-block h1 {
  font-size: var(--text-2xl);
  font-weight: 800;
  margin-bottom: var(--space-2);
  text-transform: uppercase;
}

.lesson-chips {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.lesson-chips .chip {
  font-size: var(--text-xs);
  text-transform: lowercase;
}

.lesson-nav-btns {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  min-width: 0;
  max-width: 100%;
}

/* Pill tabs (bank auth-tabs style) */
.lesson-tabs {
  display: flex;
  gap: 4px;
  background: var(--color-surface2);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: var(--space-6);
}

.tab-btn {
  flex: 1;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.tab-btn.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.tab-btn:hover:not(.active) { color: var(--color-text); }

.tab-panel { display: none; padding-top: var(--space-2); }
.tab-panel.active { display: block; }
.tab-btn[hidden],
.tab-panel[hidden],
#lessonMaterials[hidden] { display: none !important; }

.notes-body,
.practicum-body {
  line-height: 1.75;
  text-transform: lowercase;
}

.notes-body h2,
.practicum-body h2,
.notes-body h3,
.practicum-body h3 {
  margin: var(--space-5) 0 var(--space-3);
  text-transform: uppercase;
  font-weight: 700;
}

.notes-body p,
.practicum-body p { margin-bottom: var(--space-4); }

.notes-body ul,
.practicum-body ul {
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
}

.test-header {
  padding: var(--space-5);
  background: rgba(15, 76, 129, 0.08);
  border: 1px solid rgba(15, 76, 129, 0.18);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-6);
}

.test-question { margin-bottom: var(--space-6); }

.test-question h4 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-3);
  text-transform: lowercase;
}

.answer-options { display: grid; gap: var(--space-2); }

.answer-opt {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  text-align: left;
  width: 100%;
  color: var(--color-text);
  font-size: var(--text-sm);
}

.answer-opt:hover { border-color: rgba(15, 76, 129, 0.35); }

.answer-opt.selected {
  border-color: rgba(15, 76, 129, 0.6);
  background: rgba(15, 76, 129, 0.08);
}

.answer-opt.correct {
  border-color: rgba(115, 198, 146, 0.6);
  background: rgba(115, 198, 146, 0.08);
}

.answer-opt.wrong {
  border-color: rgba(239, 68, 68, 0.5);
  background: rgba(239, 68, 68, 0.07);
}

.opt-letter {
  min-width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background: rgba(15, 76, 129, 0.1);
  display: grid;
  place-items: center;
  font-size: var(--text-xs);
  font-weight: 700;
  flex-shrink: 0;
}

.test-submit-row {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

.test-result {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.lesson-sidebar {
  display: grid;
  gap: var(--space-5);
  position: sticky;
  top: 72px;
}

.sidebar-section {
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

[data-theme="light"] .sidebar-section {
  box-shadow: 0 2px 16px rgba(15, 76, 129, 0.07);
}

.sidebar-section h3 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
}

.chat-messages {
  display: grid;
  gap: var(--space-3);
  max-height: 280px;
  overflow-y: auto;
}

.chat-msg {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.chat-msg.own { flex-direction: row-reverse; }

.chat-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  display: grid;
  place-items: center;
  font-size: var(--text-xs);
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.chat-bubble {
  max-width: 85%;
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.5;
  background: rgba(15, 76, 129, 0.06);
  border: 1px solid var(--color-border);
  text-transform: lowercase;
}

.chat-msg.own .chat-bubble { background: rgba(15, 76, 129, 0.12); }

.chat-bubble time {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}

.chat-textarea {
  width: 100%;
  min-height: 72px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: var(--space-3);
  font-family: inherit;
  font-size: var(--text-sm);
  resize: vertical;
  box-sizing: border-box;
}

.chat-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
  flex-wrap: wrap;
}

.file-attach-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  cursor: pointer;
  border: 1px dashed var(--color-border);
  padding: 6px 10px;
  border-radius: var(--radius-md);
}

.file-attach-input { display: none; }

/* ===== EDITOR (redaktor-kursov) ===== */
body.editor-page {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  margin: 0;
}

.editor-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-8) var(--space-10);
}

.editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.editor-header h1 {
  font-size: 1.25rem;
  font-weight: 800;
  text-transform: uppercase;
  margin: 0;
}

.editor-header p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 4px 0 0;
  text-transform: lowercase;
}

.toolbar {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.editor-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-6);
  align-items: start;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
}

[data-theme="light"] .panel {
  box-shadow: 0 2px 16px rgba(15, 76, 129, 0.06);
}

.panel h2 {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  margin: 0 0 var(--space-4);
}

.course-list { display: grid; gap: var(--space-2); }

.course-list-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  color: var(--color-text);
  font-size: var(--text-sm);
  transition: border-color .15s, background .15s;
}

.course-list-item:hover { border-color: rgba(15, 76, 129, 0.35); }

.course-list-item.active {
  border-color: rgba(15, 76, 129, 0.55);
  background: rgba(15, 76, 129, 0.08);
}

.course-list-item small {
  display: block;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  margin-top: 2px;
  text-transform: lowercase;
}

.form-grid { display: grid; gap: var(--space-4); }

.form-row label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--text-sm);
  background: var(--color-surface);
  color: var(--color-text);
}

.form-row textarea { min-height: 80px; resize: vertical; }
.form-row textarea.tall { min-height: 120px; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.section-block {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.section-head h3 {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  margin: 0;
}

.mini-list { display: grid; gap: var(--space-2); }

.mini-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-sm);
}

.mini-item:hover { border-color: rgba(15, 76, 129, 0.3); }

.mini-item.active {
  border-color: rgba(15, 76, 129, 0.5);
  background: rgba(15, 76, 129, 0.06);
}

.mini-item span { flex: 1; text-transform: lowercase; }

.mini-actions { display: flex; gap: 4px; }

.icon-btn {
  width: 28px;
  height: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: transparent;
  cursor: pointer;
  font-size: 12px;
  color: var(--color-text-muted);
}

.icon-btn:hover {
  color: var(--color-text);
  border-color: rgba(15, 76, 129, 0.4);
}

.icon-btn.danger:hover {
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.4);
}

.editor-page .btn-sm {
  padding: 8px 14px;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: inherit;
  border: none;
  text-transform: uppercase;
}

.editor-page .btn-primary.btn-sm {
  background: var(--color-primary);
  color: #fff;
}

.editor-page .btn-ghost.btn-sm {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.editor-page .btn-ghost.btn-sm:hover {
  border-color: rgba(15, 76, 129, 0.4);
}

.empty-hint {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: lowercase;
  padding: var(--space-4);
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}

.test-q-block {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

.test-q-block input { margin-bottom: var(--space-2); }

.editor-page .toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  display: grid;
  gap: 8px;
}

.editor-page .toast {
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  opacity: 0;
  transform: translateY(8px);
  transition: .25s;
  color: var(--color-text);
}

.editor-page .toast.show { opacity: 1; transform: translateY(0); }
.editor-page .toast.success { border-color: rgba(115, 198, 146, 0.5); }

#importInput { display: none; }

/* ===== Responsive ===== */
@media (max-width: 1100px) {
  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-sidebar { position: static; }
}

@media (max-width: 960px) {
  .courses-grid { grid-template-columns: 1fr; }
  .course-layout { grid-template-columns: 1fr; }
  .course-sidebar { position: static; }
}

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

@media (max-width: 720px) {
  :root { --topbar-control-height: 30px; }

  .topbar-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    gap: var(--space-2);
  }

  .topbar-logo { grid-column: 1; grid-row: 1; min-width: 0; }
  .brand-wordmark { font-size: 17px; }
  .brand-tagline { font-size: .6rem; }

  .topbar-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    padding: 0 0 2px;
    -webkit-overflow-scrolling: touch;
  }

  .topnav-item { padding: 0 10px; font-size: .66rem; }

  .topbar-actions {
    grid-column: 2;
    grid-row: 1;
    gap: 4px;
    margin-left: 0;
  }

  .theme-switcher { height: 30px; padding: 2px; }
  .theme-btn { width: 26px; height: 26px; }
  .topbar-bank { padding: 0 10px; font-size: .62rem; height: 30px; }
  .profile-avatar { width: 28px; height: 28px; }

  .cabinet-main,
  .course-main,
  .lesson-subbar,
  .editor-shell { padding-left: var(--space-5); padding-right: var(--space-5); }
}

@media (max-width: 700px) {
  .lesson-layout { padding: var(--space-5); }
  .lesson-subbar .back-link { display: none; }
  .brand-tagline { display: none; }
}

/* ===== EDIT PROFILE MODAL (как в банке заданий) ===== */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.auth-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.auth-form-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.auth-form-input {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: border-color var(--transition);
}

.auth-form-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.auth-form-submit {
  padding: 11px 14px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  border: none;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: .04em;
  line-height: 1.35;
  white-space: normal;
  width: 100%;
  box-sizing: border-box;
  transition: opacity var(--transition);
}

.auth-form-submit:hover { opacity: .88; }

.auth-form-error {
  color: #da5d5d;
  font-size: var(--text-xs);
  font-weight: 500;
  display: none;
}

.auth-form-error.show { display: block; }

.edit-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 2100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
  backdrop-filter: blur(4px);
}

.edit-modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.edit-modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 480px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform .25s;
  padding: var(--space-8);
}

.edit-modal-overlay.open .edit-modal { transform: translateY(0); }

.edit-modal-title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-6);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.edit-form-actions {
  display: flex;
  gap: var(--space-3);
}

.edit-form-actions .auth-form-submit { flex: 1; }

.edit-modal-cancel {
  padding: 11px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  text-transform: uppercase;
}

.edit-modal-cancel:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.edit-section-title {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin: var(--space-6) 0 var(--space-4);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.edit-inline-btn { margin-top: var(--space-2); }

.edit-readonly {
  background: var(--color-surface2);
  color: var(--color-text-muted);
  cursor: default;
}

.avatar-edit-wrap {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.avatar-edit-preview {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-lg);
  flex-shrink: 0;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  font-weight: 700;
  color: #fff;
  overflow: hidden;
}

.avatar-edit-preview img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.avatar-edit-controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
  min-width: 0;
}

.avatar-edit-file-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  min-width: 0;
}

.avatar-edit-file {
  flex: 1;
  min-width: 0;
  padding: 6px;
  font-size: var(--text-xs);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  font-family: var(--font-body);
  color: transparent;
}

.avatar-edit-file::file-selector-button {
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: .04em;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  cursor: pointer;
  margin-right: var(--space-2);
}

.avatar-edit-file-status {
  flex-shrink: 1;
  min-width: 0;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: lowercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.avatar-edit-remove {
  align-self: stretch;
  width: 100%;
  height: 30px;
  padding: 0 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: transparent;
  color: #da5d5d;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: .04em;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.avatar-edit-remove:hover {
  border-color: rgba(218, 93, 93, 0.45);
  background: rgba(218, 93, 93, 0.06);
}

@media (max-width: 640px) {
  .edit-modal-overlay {
    padding: 0;
    align-items: flex-end;
  }

  .edit-modal {
    max-height: 94vh;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    padding: var(--space-5);
  }
}

/* ===== SITE FOOTER (как в банке заданий) ===== */
.site-footer {
  margin-top: auto;
  flex-shrink: 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: var(--space-4) var(--space-8);
  padding-bottom: max(var(--space-4), env(safe-area-inset-bottom));
  width: 100%;
}

[data-theme="dark"] .site-footer { background: var(--color-bg); }

.site-footer-inner {
  width: 100%;
  max-width: min(1240px, calc(100% - 64px));
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.site-footer-copy {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
  line-height: 1.4;
}

.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.site-footer-links a,
.site-footer-link {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-decoration: none;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: var(--font-body);
  transition: color var(--transition);
}

.site-footer-links a:hover,
.site-footer-link:hover { color: var(--color-primary); }

.pd-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 3000;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.pd-modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  padding: var(--space-8);
}

.pd-modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-5);
  gap: var(--space-4);
}

.pd-modal-head h2 {
  font-size: var(--text-lg);
  font-weight: 800;
  margin: 0;
}

.pd-modal-close {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 20px;
  flex-shrink: 0;
}

.pd-modal-body {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
}

.pd-modal-body p { margin-bottom: var(--space-4); }
.pd-modal-body strong { color: var(--color-text); }

.pd-modal-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.pd-modal-ok {
  margin-top: var(--space-6);
  padding: 10px 24px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  border: none;
  cursor: pointer;
}

@media (max-width: 720px) {
  .site-footer { padding: var(--space-3) var(--space-4); }
  .site-footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    max-width: none;
  }
}