/* ГОСТ-стиль портфолио с темной темой */

:root {
  --bg-color: #1a1a1a;
  --surface-color: #2d2d2d;
  --text-primary: #e4e4e4;
  --text-secondary: #b8b8b8;
  --text-muted: #888888;
  --accent-color: #4a90e2;
  --accent-hover: #357abd;
  --border-color: #404040;
  --success-color: #4caf50;
  --warning-color: #ff9800;
  --error-color: #f44336;
  
  --font-family: 'Times New Roman', 'Liberation Serif', serif;
  --mono-font: 'Courier New', 'Liberation Mono', monospace;
  --line-height: 1.6;
  --border-radius: 4px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: var(--font-family);
  line-height: var(--line-height);
  color: var(--text-primary);
  background-color: var(--bg-color);
  font-size: 16px;
}

/* Типографика */
h1, h2, h3, h4, h5, h6 {
  font-weight: normal;
  margin-bottom: 0.5em;
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 0.25em;
}

h2 {
  font-size: 1.8rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.25em;
  margin: 2em 0 1em 0;
}

h3 {
  font-size: 1.4rem;
  margin: 1.5em 0 0.75em 0;
}

p {
  margin-bottom: 1em;
}

a {
  color: var(--accent-color);
  text-decoration: underline;
}

a:hover {
  color: var(--accent-hover);
}

/* Макет */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

/* Медальон-монограмма в шапке */
.header-brand-badge {
  justify-content: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 50%;
  background-color: #262626;
  color: #f8fafc;
  border: 2px solid #404040;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.header-brand-badge:hover {
  color: #f8fafc;
  transform: scale(1.05);
  border-color: var(--accent-color);
}

.header-brand-initials {
  font-family: var(--font-family);
  font-size: 17px;
  font-weight: bold;
  letter-spacing: 0.5px;
  line-height: 1;
}

[data-theme="light"] .header-brand-badge {
  background-color: #1e293b;
  border-color: #cbd5e1;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .header-brand-badge:hover {
  border-color: var(--accent-color);
}

/* Навигация */
nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

nav a:hover,
nav a.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

/* Main content */
main {
  min-height: calc(100vh - 120px);
  padding: 2rem 0;
}

/* Intro layout with photo */
.intro-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  align-items: start;
  margin-bottom: 2rem;
}

.intro-content h1 {
  margin-top: 0;
}

.intro-image {
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.profile-photo-container {
  position: relative;
  width: 100%;
  max-width: 300px;
  aspect-ratio: 3/4;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid #2d3748;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.6);
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.95) contrast(1.05);
  transition: filter 0.3s ease;
}

/* Светлая тема: чёткое паспарту вместо размытой тени */
[data-theme="light"] .profile-photo-container {
  border: 4px solid #ffffff;
  outline: 1px solid #cbd5e1;
  box-shadow: inset 0 0 12px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .profile-photo {
  filter: contrast(1.04) brightness(1.02);
}

[data-theme="light"] .profile-photo-container::after {
  background: radial-gradient(ellipse 60% 80% at center,
    transparent 55%,
    rgba(0, 0, 0, 0.05) 75%,
    rgba(0, 0, 0, 0.15) 90%,
    rgba(0, 0, 0, 0.25) 100%);
}

.profile-photo-container::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 50%;
  background: radial-gradient(ellipse 60% 80% at center, 
    transparent 35%, 
    rgba(0, 0, 0, 0.1) 50%, 
    rgba(0, 0, 0, 0.3) 70%, 
    rgba(0, 0, 0, 0.6) 85%, 
    rgba(0, 0, 0, 0.9) 100%);
  pointer-events: none;
}

/* Карточки */
.card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.card-title {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

/* Грид для карточек */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

/* Таймлайн */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0.75rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--border-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
  padding-left: 2rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -0.375rem;
  top: 0.25rem;
  width: 0.75rem;
  height: 0.75rem;
  background-color: var(--accent-color);
  border-radius: 50%;
  border: 2px solid var(--bg-color);
}

.timeline-date {
  font-weight: bold;
  color: var(--accent-color);
  margin-bottom: 0.25rem;
}

.timeline-content h3 {
  margin-top: 0;
}

/* Двухколоночный макет для образования */
.education-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
}

.education-date {
  font-weight: bold;
  color: var(--accent-color);
}

.education-content h3 {
  margin-top: 0;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.education-logo {
  width: 80px;
  height: 80px;
  min-width: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  background-color: rgba(74, 144, 226, 0.1);
  font-size: 1.2rem;
}

.education-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 4px;
}

.education-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.education-institution {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Бейджи */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: var(--accent-color);
  color: white;
  border-radius: 1rem;
  font-size: 0.875rem;
  margin: 0.25rem 0.5rem 0.25rem 0;
}

.badge.international {
  background-color: var(--success-color);
}

.badge.national {
  background-color: var(--warning-color);
}

.badge.regional {
  background-color: var(--error-color);
}

/* Публикации ГОСТ */
.publication {
  margin-bottom: 1.5rem;
  padding: 1rem;
  background-color: var(--surface-color);
  border-left: 3px solid var(--accent-color);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.publication-year {
  font-weight: bold;
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.publication-text {
  font-family: var(--font-family);
  line-height: 1.5;
}

.publication-authors {
  font-weight: normal;
}

.publication-title {
  font-style: italic;
}

.publication-source {
  font-weight: normal;
}

/* Кнопки */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--accent-color);
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease;
  font-family: inherit;
  font-size: 1rem;
}

.btn:hover {
  background-color: var(--accent-hover);
  color: white;
}

.btn-outline {
  background-color: transparent;
  color: var(--accent-color);
  border: 1px solid var(--accent-color);
}

.btn-outline:hover {
  background-color: var(--accent-color);
  color: white;
}

.buttons-group {
  display: flex;
  gap: 1rem;
  margin: 1.5rem 0;
  flex-wrap: wrap;
}

/* Форма контактов */
.contact-form {
  max-width: 600px;
  margin: 2rem auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  background-color: var(--surface-color);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
footer {
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
  color: var(--text-muted);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Кнопка "наверх" */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 50%;
  width: 3rem;
  height: 3rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--accent-hover);
}

/* Адаптивный дизайн */
@media (max-width: 768px) {
  .container {
    padding: 0 15px;
  }

  .theme-toggle {
    top: 0.75rem;
    right: 0.75rem;
    padding: 0.5rem 0.7rem;
    font-size: 1rem;
  }

  .header-content {
    flex-direction: column;
    gap: 1rem;
  }

  nav ul {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .education-layout {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  
  .buttons-group {
    justify-content: center;
  }
  
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  /* Мобильный порядок: ФИО → фото → описание */
  .intro-layout {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .intro-content {
    display: contents;
  }

  .intro-content h1 {
    order: 1;
  }

  .intro-image {
    order: 2;
  }

  .intro-content .card {
    order: 3;
  }

  .profile-photo-container {
    max-width: 240px;
  }
}

@media (max-width: 480px) {
  nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .timeline {
    padding-left: 1rem;
  }
  
  .timeline-item {
    padding-left: 1rem;
  }
  
  .back-to-top {
    bottom: 1rem;
    right: 1rem;
  }

  .profile-photo-container {
    max-width: 200px;
  }
}

/* Светлая тема */
[data-theme="light"] {
  --bg-color: #f5f5f5;
  --surface-color: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #777777;
  --accent-color: #0066cc;
  --accent-hover: #0052a3;
  --border-color: #e0e0e0;
}

/* Переключатель темы */
.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background-color: var(--surface-color);
  border: 2px solid var(--accent-color);
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10000;
  padding: 0.6rem 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: auto;
  height: auto;
  border-radius: 50px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  font-weight: bold;
}

.theme-toggle:hover {
  transform: scale(1.1);
  background-color: var(--accent-color);
  color: white;
  box-shadow: 0 4px 12px rgba(74, 144, 226, 0.4);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-toggle::after {
  content: '';
  display: inline-block;
  margin-left: 0.5rem;
  width: 4px;
  height: 4px;
  background-color: var(--accent-color);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.theme-toggle:hover::after {
  background-color: white;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Полоса прогресса */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color), var(--success-color));
  width: 0%;
  transition: width 0.1s ease;
  z-index: 101;
}

/* Блок статистики */
.statistics-section {
  background: linear-gradient(135deg, var(--surface-color), var(--surface-color));
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin: 2rem 0;
  box-shadow: var(--shadow);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  text-align: center;
}

.stat-item {
  padding: 1rem;
}

.stat-counter {
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--accent-color);
  display: block;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Кнопки фильтрации */
.filter-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}

.filter-btn {
  padding: 0.5rem 1rem;
  background-color: var(--surface-color);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 1.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.9rem;
}

.filter-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.filter-btn.active {
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* Поиск публикаций */
.search-box {
  margin: 1.5rem 0;
  position: relative;
}

.search-box input {
  width: 100%;
  max-width: 400px;
  padding: 0.75rem;
  background-color: var(--surface-color);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: border-color 0.2s ease;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

#search-results {
  color: var(--error-color);
  margin-top: 1rem;
  display: none;
}

/* Выделение текста поиска */
mark {
  background-color: var(--warning-color);
  color: white;
  padding: 0.1rem 0.3rem;
  border-radius: 2px;
}

/* Анимация видимости */
.timeline-item {
  opacity: 1;
  transition: opacity 0.3s ease;
}

.timeline-item:not(.visible) {
  opacity: 0.3;
  pointer-events: none;
}

.publication {
  opacity: 1;
  transition: opacity 0.3s ease;
}

.publication:not(.visible) {
  opacity: 0.3;
  pointer-events: none;
}

/* Анимация входа */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn 0.3s ease;
}

/* Печать */
@media print {
  * {
    background: white !important;
    color: black !important;
  }

  header, footer, .back-to-top, .theme-toggle, .progress-bar {
    display: none !important;
  }

  .container {
    max-width: none;
    padding: 0;
  }

  .card, .publication {
    border: 1px solid #ccc !important;
    break-inside: avoid;
  }

  h1, h2 {
    page-break-after: avoid;
  }
}

/* Адаптив для мобильных */
@media (max-width: 768px) {
  .theme-toggle {
    top: 0.75rem;
    right: 0.75rem;
    padding: 0.5rem 0.7rem;
    font-size: 1rem;
  }

  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }

  .stat-counter {
    font-size: 2rem;
  }

  .filter-buttons {
    gap: 0.5rem;
  }

  .filter-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
  }

  .search-box input {
    max-width: 100%;
  }
}

/* Прогресс-бар */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color), #2196f3);
  width: 0%;
  z-index: 999;
  transition: width 0.1s ease;
}

/* Светлая тема */
[data-theme="light"] {
  --bg-color: #f5f5f5;
  --surface-color: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #555555;
  --text-muted: #888888;
  --accent-color: #2563eb;
  --accent-hover: #1d4ed8;
  --border-color: #e0e0e0;
}

[data-theme="light"] .progress-bar {
  background: linear-gradient(90deg, #2563eb, #3b82f6);
}

/* Стили для логотипов учебных заведений */
.education-layout {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 2rem;
  align-items: start;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.education-logo-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 120px;
  height: 120px;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.5rem;
}

.education-logo-container img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}

.education-logo-emoji {
  font-size: 3rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.education-content {
  grid-column: 2;
}

.education-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.education-header h3 {
  margin: 0;
  font-size: 1.3rem;
}

.education-date {
  color: var(--accent-color);
  font-weight: bold;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

/* Адаптивный дизайн для логотипов */
@media (max-width: 768px) {
  .education-layout {
    grid-template-columns: 80px 1fr;
    gap: 1rem;
  }

  .education-logo-container {
    width: 80px;
    height: 80px;
  }

  .education-logo-emoji {
    font-size: 2rem;
  }

  .education-header h3 {
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  .education-layout {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .education-logo-container {
    width: 100%;
    max-width: 100px;
    margin: 0 auto;
  }

  .education-content {
    grid-column: 1;
  }

  .education-header h3 {
    font-size: 1rem;
  }
}