@import url('https://fonts.googleapis.com/css2?family=Alegreya&family=Montserrat&family=UnifrakturCook&display=swap');

:root {
  --bg-gradient-start: #e5e0f9;
  --bg-gradient-end: #b6aeea;
  --text-color: #2d1d3a;
  --accent-color: #7a5fff;
  --accent-color-light: #b6aeea;
  --button-bg: #e1d4f2;
  --button-color: #4d2e8c;
  --button-bg-active: #7a5fff;
  --button-color-active: #fff;
  --shadow-color: #7a5fff22;
  --border-color: #7a5fff;
}

body {
  background: radial-gradient(ellipse at top, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  color: var(--text-color);
  font-family: 'Alegreya', serif;
  font-size: 1.1rem;
  line-height: 1.6;
  margin: 0;
  min-height: 100vh;
  transition: background 0.4s ease, color 0.4s ease;
}

#theme-switcher {
  position: fixed;
  top: 1rem;
  left: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5em;
  width: 160px;
  font-family: 'Montserrat', sans-serif;
  user-select: none;
  z-index: 1000;
}

#theme-switcher button,
#theme-switcher button[data-back-button] {
  padding: 0.5em 1em;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 10px;
  border: 2px solid var(--accent-color);
  background: var(--button-bg);
  color: var(--accent-color);
  cursor: pointer;
  transition: background-color 0.3s ease, color 0.3s ease;
  text-align: center;
  width: 100%;
  box-sizing: border-box;
}

#theme-switcher button.active,
#theme-switcher button:hover,
#theme-switcher button:focus-visible,
#theme-switcher button[data-back-button]:hover,
#theme-switcher button[data-back-button]:focus-visible {
  background-color: var(--button-bg-active);
  color: var(--button-color-active);
  outline: none;
}

body.theme-dark {
  --button-bg: #2e2850;
  --accent-color: #01cfff;
  --button-bg-active: #01cfff;
  --button-color-active: #231f33;
  background: radial-gradient(ellipse at top, #1e1930 0%, #2a2443 100%);
  color: #e5e3f7;
}

body.theme-contrast {
  --button-bg: #fff;
  --accent-color: #000;
  --button-bg-active: #000;
  --button-color-active: #fff;
  background: #fff;
  color: #000;
}

header {
  padding-left: 180px; /* примерно ширина панели #theme-switcher + небольшой запас */
  padding-top: 1rem;
  padding-bottom: 1rem;
  background: var(--button-bg);
  border-bottom: 2px solid var(--accent-color);
}

header h1 {
  margin: 0 0 0.5rem 0;
  font-family: 'UnifrakturCook', serif;
  color: var(--accent-color);
}

nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 1rem;
}

nav a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
}

nav a:hover,
nav a:focus {
  text-decoration: underline;
}

main {
  padding: 2rem 1.5rem;
  max-width: 900px;
  margin: auto;
}

/* Стили для интерактивной схемы сюжета */
#plot-chart {
  margin-top: 1.5rem;
  border: 2px solid var(--accent-color);
  padding: 1rem;
  border-radius: 12px;
  box-shadow: 0 0 8px var(--shadow-color);
  background-color: var(--button-bg);
}

.plot-node {
  background-color: var(--accent-color-light);
  border-radius: 8px;
  padding: 1rem;
  margin: 0.5rem 0;
  cursor: pointer;
  transition: background-color 0.3s ease;
  user-select: none;
  border: 2px solid transparent;
}

.plot-node:hover,
.plot-node.active {
  background-color: var(--accent-color);
  color: var(--button-color-active);
  border-color: var(--button-color-active);
}

.plot-description {
  margin-top: 0.5rem;
  padding-left: 1rem;
  font-style: italic;
  display: none;
}

.plot-description.open {
  display: block;
}

/* Responsive */
@media (max-width: 600px) {
  #theme-switcher {
    position: static;
    flex-direction: row;
    width: auto;
    gap: 0.5rem;
    margin-bottom: 1rem;
  }
  
  main {
    padding: 1rem;
  }
}