:root {
  --color-background-primary: #f1f4f8;
  --color-background-secondary: #fff;
  --color-text-primary: #213245;
  --color-text-secondary: #6d7e92;
  --color-text-info: #0e71eb;
  --color-text-info-interactive: #0c60c8;
  --color-border-primary: #d7dbe4;
  --color-icon-primary: #213245;
  --color-icon-secondary: #6d7e92;
  --color-icon-info: #0e71eb;
  --border-radius-s: 8px;
  --border-radius-m: 12px;
  --border-radius-l: 16px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
    sans-serif;
  background-color: var(--color-background-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 16px;
}

.page-block {
  background-color: var(--color-background-secondary);
  border-radius: var(--border-radius-l);
  padding: 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border-primary);
}

.title {
  font-size: 28px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
  line-height: 1.3;
}

.subtitle {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.documents-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.document-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background-color: var(--color-background-secondary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius-m);
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
  cursor: pointer;
}

.document-card:hover {
  border-color: var(--color-text-info);
  box-shadow: 0 4px 12px rgba(14, 113, 235, 0.1);
  transform: translateY(-2px);
}

.document-card:active {
  transform: translateY(0);
}

.document-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-background-primary);
  border-radius: var(--border-radius-s);
  color: var(--color-icon-info);
}

.document-content {
  flex: 1;
  min-width: 0;
}

.document-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 4px;
  line-height: 1.4;
}

.document-description {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.document-arrow {
  flex-shrink: 0;
  color: var(--color-icon-secondary);
  transition: transform 0.2s ease;
}

.document-card:hover .document-arrow {
  color: var(--color-icon-info);
  transform: translateX(4px);
}

.footer {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border-primary);
}

.footer-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-align: center;
}

/* Document page styles */
.document-header {
  margin-bottom: 32px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-info);
  text-decoration: none;
  margin-bottom: 16px;
  transition: color 0.2s ease;
}

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

.back-link svg {
  transform: rotate(180deg);
}

.document-title-page {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
  line-height: 1.3;
}

.document-meta {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.document-body {
  color: var(--color-text-primary);
  line-height: 1.8;
}

.document-body h2 {
  font-size: 24px;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 16px;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.document-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 12px;
  color: var(--color-text-primary);
  line-height: 1.4;
}

.document-body p {
  margin-bottom: 16px;
  font-size: 16px;
}

.document-body ul,
.document-body ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.document-body li {
  margin-bottom: 8px;
  font-size: 16px;
}

.document-body strong {
  font-weight: 600;
  color: var(--color-text-primary);
}

/* 404 page styles */
.error-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 64px 24px;
}

.error-code {
  font-size: 96px;
  font-weight: 700;
  color: var(--color-text-info);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 12px;
  line-height: 1.3;
}

.error-description {
  font-size: 18px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 480px;
}

.error-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background-color: var(--color-text-info);
  color: #fff;
  text-decoration: none;
  border-radius: var(--border-radius-s);
  font-size: 16px;
  font-weight: 500;
  transition: background-color 0.2s ease;
}

.error-link:hover {
  background-color: var(--color-text-info-interactive);
}

/* Responsive breakpoints */
@media (max-width: 1440px) {
  .container {
    padding: 16px;
  }
}

@media (max-width: 1280px) {
  .title {
    font-size: 26px;
  }

  .document-title-page {
    font-size: 28px;
  }

  .error-code {
    font-size: 80px;
  }
}

@media (max-width: 720px) {
  .container {
    padding: 12px;
  }

  .page-block {
    padding: 20px;
  }

  .title {
    font-size: 24px;
  }

  .subtitle {
    font-size: 15px;
  }

  .document-card {
    padding: 16px;
    gap: 12px;
  }

  .document-icon {
    width: 40px;
    height: 40px;
  }

  .document-icon svg {
    width: 20px;
    height: 20px;
  }

  .document-title {
    font-size: 16px;
  }

  .document-description {
    font-size: 13px;
  }

  .document-title-page {
    font-size: 24px;
  }

  .document-body h2 {
    font-size: 20px;
  }

  .document-body h3 {
    font-size: 18px;
  }

  .document-body p,
  .document-body li {
    font-size: 15px;
  }

  .error-code {
    font-size: 64px;
  }

  .error-title {
    font-size: 24px;
  }

  .error-description {
    font-size: 16px;
  }
}

@media (max-width: 360px) {
  .container {
    padding: 8px;
  }

  .page-block {
    padding: 16px;
    border-radius: var(--border-radius-m);
  }

  .title {
    font-size: 22px;
  }

  .subtitle {
    font-size: 14px;
  }

  .document-card {
    padding: 12px;
    gap: 10px;
  }

  .document-icon {
    width: 36px;
    height: 36px;
  }

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

  .document-title {
    font-size: 15px;
  }

  .document-description {
    font-size: 12px;
  }

  .document-arrow svg {
    width: 16px;
    height: 16px;
  }

  .document-title-page {
    font-size: 22px;
  }

  .document-body h2 {
    font-size: 18px;
  }

  .document-body h3 {
    font-size: 16px;
  }

  .document-body p,
  .document-body li {
    font-size: 14px;
  }

  .error-container {
    padding: 48px 16px;
  }

  .error-code {
    font-size: 56px;
  }

  .error-title {
    font-size: 20px;
  }

  .error-description {
    font-size: 14px;
  }

  .error-link {
    font-size: 14px;
    padding: 10px 20px;
  }
}