/* 
 * Первый Бит — Фирменный стиль и адаптивный Tufte-layout для обучающих модулей
 * Акцент: #E50071 (Pantone 213)
 * Шрифты: Inter, Manrope, sans-serif
 * Полная поддержка мобильных устройств, смартфонов и планшетов
 */

:root {
  --bit-magenta: #E50071;
  --bit-magenta-light: #FDF2F7;
  --bit-magenta-dark: #B8005A;
  --bit-black: #000000;
  --bit-text: #1E1E1E;
  --bit-text-muted: #666666;
  --bit-bg: #FFFFFF;
  --bit-card-bg: #F8F9FA;
  --bit-border: #EBEBEB;
  --bit-border-dark: #D1D5DB;
  --bit-success: #10B981;
  --bit-success-light: #ECFDF5;
  --bit-warning: #F59E0B;
  --bit-warning-light: #FFFBEB;
  --bit-danger: #EF4444;
  --bit-danger-light: #FEF2F2;
  --font-family: "Inter", "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  overflow-x: hidden;
}

body {
  font-family: var(--font-family);
  color: var(--bit-text);
  background-color: var(--bit-bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  padding: 0;
  overflow-x: hidden;
  width: 100%;
}

/* Container & Layout */
.page-container {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 36px 20px 80px 20px;
}

/* Header & Brand */
.header {
  border-bottom: 2px solid var(--bit-border);
  padding-bottom: 20px;
  margin-bottom: 32px;
}

.brand-logo {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.5px;
  color: var(--bit-black);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.brand-logo .dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--bit-magenta);
  margin: 0 1px;
}

.brand-logo .bit {
  font-weight: 800;
}

.lesson-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--bit-text-muted);
  margin-bottom: 8px;
}

.lesson-badge {
  background-color: var(--bit-magenta-light);
  color: var(--bit-magenta);
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 12px;
}

h1 {
  font-size: clamp(22px, 5.5vw, 32px);
  font-weight: 800;
  color: var(--bit-black);
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  word-break: break-word;
}

h2 {
  font-size: clamp(18px, 4.5vw, 22px);
  font-weight: 700;
  color: var(--bit-black);
  margin-top: 36px;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
  border-left: 4px solid var(--bit-magenta);
  padding-left: 12px;
  word-break: break-word;
}

h3 {
  font-size: clamp(16px, 4vw, 18px);
  font-weight: 700;
  color: var(--bit-black);
  margin-top: 24px;
  margin-bottom: 12px;
  word-break: break-word;
}

p {
  margin-bottom: 16px;
  color: var(--bit-text);
  word-break: break-word;
}

ul, ol {
  margin-bottom: 16px;
  padding-left: 20px;
}

li {
  margin-bottom: 8px;
  word-break: break-word;
}

strong {
  font-weight: 700;
  color: var(--bit-black);
}

/* Callouts & Tufte elements */
.callout {
  background-color: var(--bit-card-bg);
  border-left: 3px solid var(--bit-magenta);
  padding: 16px 18px;
  border-radius: 0 8px 8px 0;
  margin: 20px 0;
  font-size: 15px;
  word-break: break-word;
}

.callout-warning {
  background-color: var(--bit-warning-light);
  border-left-color: var(--bit-warning);
}

.callout-danger {
  background-color: var(--bit-danger-light);
  border-left-color: var(--bit-danger);
}

.callout-title {
  font-weight: 700;
  color: var(--bit-black);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* Quote cards */
.expert-quote {
  background: var(--bit-card-bg);
  border: 1px solid var(--bit-border);
  border-radius: 8px;
  padding: 18px;
  margin: 20px 0;
  position: relative;
  word-break: break-word;
}

.expert-quote blockquote {
  font-style: italic;
  color: #333;
  margin-bottom: 12px;
  border: none;
  padding: 0;
}

.expert-quote .author {
  font-weight: 700;
  font-size: 13px;
  color: var(--bit-magenta);
}

.expert-quote .role {
  font-size: 12px;
  color: var(--bit-text-muted);
}

/* Cards & Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.info-card {
  background: var(--bit-bg);
  border: 1px solid var(--bit-border);
  border-radius: 8px;
  padding: 18px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  word-break: break-word;
}

.info-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.info-card .card-number {
  color: var(--bit-magenta);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.info-card .card-title {
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--bit-black);
}

.info-card p {
  font-size: 14px;
  color: #4B5563;
  margin: 0;
}

/* Tables with Mobile Horizontal Scroll */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 20px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
  min-width: 480px;
}

th, td {
  border: 1px solid var(--bit-border);
  padding: 10px 12px;
  text-align: left;
  word-break: normal;
}

th {
  background-color: var(--bit-card-bg);
  font-weight: 700;
  color: var(--bit-black);
}

/* Interactive Quiz Section */
.quiz-section {
  background: #FAFAFA;
  border: 2px solid var(--bit-border);
  border-radius: 12px;
  padding: 24px 20px;
  margin: 32px 0;
}

.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--bit-border);
  flex-wrap: wrap;
  gap: 8px;
}

.quiz-header h3 {
  margin: 0;
  font-size: 18px;
}

.quiz-progress {
  font-size: 13px;
  font-weight: 700;
  color: var(--bit-magenta);
}

.quiz-question {
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 16px;
  color: var(--bit-black);
  word-break: break-word;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.quiz-option-btn {
  background: #FFFFFF;
  border: 1px solid var(--bit-border-dark);
  border-radius: 6px;
  padding: 12px 16px;
  text-align: left;
  font-family: inherit;
  font-size: 14px;
  color: var(--bit-text);
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1.4;
  word-break: break-word;
  min-height: 44px;
}

.quiz-option-btn:hover:not(:disabled) {
  border-color: var(--bit-magenta);
  background-color: var(--bit-magenta-light);
}

.quiz-option-btn.correct {
  background-color: var(--bit-success-light);
  border-color: var(--bit-success);
  color: #065F46;
  font-weight: 600;
}

.quiz-option-btn.wrong {
  background-color: var(--bit-danger-light);
  border-color: var(--bit-danger);
  color: #991B1B;
}

.quiz-feedback {
  display: none;
  padding: 14px;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 16px;
  word-break: break-word;
}

.quiz-feedback.show {
  display: block;
}

.quiz-feedback.success {
  background-color: var(--bit-success-light);
  border: 1px solid var(--bit-success);
  color: #065F46;
}

.quiz-feedback.error {
  background-color: var(--bit-danger-light);
  border: 1px solid var(--bit-danger);
  color: #991B1B;
}

.next-btn, .submit-btn {
  background: var(--bit-magenta);
  color: #FFFFFF;
  border: none;
  border-radius: 6px;
  padding: 12px 20px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  text-decoration: none;
  text-align: center;
}

.next-btn:hover, .submit-btn:hover {
  background: var(--bit-magenta-dark);
}

/* Interactive Configurator */
.configurator-box {
  background: var(--bit-card-bg);
  border: 1px solid var(--bit-border);
  border-radius: 8px;
  padding: 20px 16px;
  margin: 24px 0;
}

.config-select {
  width: 100%;
  padding: 10px 12px;
  font-size: 15px;
  border-radius: 6px;
  border: 1px solid var(--bit-border-dark);
  margin: 10px 0 18px 0;
  font-family: inherit;
  background-color: #FFFFFF;
  max-width: 100%;
}

.recommendation-card {
  background: #FFFFFF;
  border: 2px solid var(--bit-magenta);
  border-radius: 8px;
  padding: 18px;
  margin-top: 16px;
  word-break: break-word;
}

/* Footer & Navigation */
.lesson-footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 2px solid var(--bit-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  flex-wrap: wrap;
  gap: 14px;
}

.lesson-footer a {
  color: var(--bit-magenta);
  text-decoration: none;
  font-weight: 700;
  padding: 6px 0;
  display: inline-block;
}

.lesson-footer a:hover {
  text-decoration: underline;
}

/* Glossary Tooltips */
.glossary-term {
  border-bottom: 1.5px dotted var(--bit-magenta);
  cursor: help;
  color: inherit;
  font-weight: 500;
  transition: all 0.15s ease;
  position: relative;
}

.glossary-term:hover {
  background-color: var(--bit-magenta-light);
  color: var(--bit-magenta-dark);
}

.bit-tooltip-popover {
  display: none;
  position: absolute;
  z-index: 10000;
  max-width: calc(100vw - 24px);
  width: 320px;
  background: #1E1E1E;
  color: #FFFFFF;
  border-radius: 8px;
  padding: 14px 16px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  font-size: 13px;
  line-height: 1.45;
  pointer-events: auto;
  transition: opacity 0.15s ease;
  word-break: break-word;
}

.bit-tooltip-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  border-bottom: 1px solid #374151;
  padding-bottom: 6px;
}

.bit-tooltip-badge {
  background: var(--bit-magenta);
  color: #FFFFFF;
  font-size: 10px;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
}

.bit-tooltip-title {
  font-weight: 700;
  font-size: 13px;
  color: #F9FAFB;
}

.bit-tooltip-body {
  color: #D1D5DB;
}

/* Mobile Responsiveness Media Queries */
@media (max-width: 640px) {
  .page-container {
    padding: 20px 14px 60px 14px;
  }

  .header {
    margin-bottom: 24px;
    padding-bottom: 16px;
  }

  .lesson-meta {
    font-size: 12px;
    gap: 6px;
  }

  .quiz-section {
    padding: 16px 12px;
    margin: 24px 0;
  }

  .quiz-option-btn {
    padding: 10px 12px;
    font-size: 13px;
  }

  .next-btn, .submit-btn {
    width: 100%;
    padding: 12px 14px;
  }

  .lesson-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .lesson-footer div {
    width: 100%;
  }

  .lesson-footer a {
    display: block;
    width: 100%;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .info-card {
    padding: 14px;
  }

  .callout {
    padding: 14px;
  }
}