:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  --bg-page: #ffffff;
  --bg-subtle: #f8fafc;
  --text-primary: #222222;
  --text-muted: #666666;
  --border-color: #e5e7eb;
  --border-focus: #0366d6;
  --link-color: #0366d6;
  --link-hover: #004085;
  --nav-active-bg: #f0f4f8;
  --nav-active-color: #0366d6;
  
  --container-width: 780px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: #121212;
    --bg-subtle: #1a1f26;
    --text-primary: #e0e0e0;
    --text-muted: #a0a0a0;
    --border-color: #2c2c2c;
    --border-focus: #58a6ff;
    --link-color: #58a6ff;
    --link-hover: #79c0ff;
    --nav-active-bg: #1c2430;
    --nav-active-color: #58a6ff;
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link-color);
  text-decoration: none;
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Menu */
header.site-header {
  position: sticky;
  top: 0;
  background-color: var(--bg-page);
  border-bottom: 1px solid var(--border-color);
  z-index: 50;
  padding: 0.85rem 0;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.4rem;
}

h1.site-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1.site-title a {
  color: var(--text-primary);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-choice {
  font-size: 0.85rem;
  display: flex;
  gap: 0.5rem;
}

.lang-choice a {
  color: var(--text-muted);
  font-weight: 500;
}

.lang-choice a.active {
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

/* Menu Toggle Button (Mobile) */
button.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.3rem 0.55rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  align-items: center;
  gap: 0.4rem;
  line-height: 1;
}

button.menu-toggle svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

button.menu-toggle:focus-visible {
  outline: 2px solid var(--border-focus);
}

nav.menu {
  font-size: 0.95rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
}

nav.menu a {
  color: var(--link-color);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

nav.menu a.active {
  font-weight: 600;
  color: var(--nav-active-color);
  background-color: var(--nav-active-bg);
  text-decoration: none;
}

/* Floating Back to Top Button */
a.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: var(--bg-page);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  text-decoration: none;
  font-size: 1.1rem;
  line-height: 1;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease, border-color 0.15s ease, background-color 0.15s ease;
}

a.back-to-top.is-visible {
  opacity: 0.9;
  visibility: visible;
  transform: translateY(0);
}

a.back-to-top:hover {
  opacity: 1;
  color: var(--link-color);
  border-color: var(--link-color);
  text-decoration: none;
}

a.back-to-top:focus-visible {
  outline: 2px solid var(--border-focus);
}

/* Content Sections */
.section {
  padding: 2.5rem 0 1.5rem 0;
}

h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.35rem;
}

p {
  margin-bottom: 1rem;
}

p.reading-note {
  margin-bottom: 0.85rem;
}

small.subnote {
  display: block;
  font-style: italic;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

/* Clean Unboxed Lists */
ul.item-list {
  list-style-type: square;
  margin-left: 1.4rem;
  margin-bottom: 1.25rem;
}

ul.item-list li {
  margin-bottom: 0.5rem;
}

/* Image Item List (Albums & Books) */
ul.img-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

ul.img-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

ul.img-list img {
  width: 38px;
  height: 38px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

ul.img-list.books img {
  width: 32px;
  height: 44px;
}

/* Audio Player Section - Sober & Refined */
.player-section {
  margin: 1.5rem 0;
  padding: 1rem 1.15rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  max-width: 580px;
}

.player-controls-row {
  display: flex;
  gap: 0.65rem;
  align-items: center;
  margin-bottom: 0.85rem;
}

select.player-select {
  font-family: inherit;
  font-size: 0.88rem;
  padding: 0.45rem 1.75rem 0.45rem 0.65rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-page);
  color: var(--text-primary);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23666666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.55rem center;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s ease;
}

select.player-select:focus {
  border-color: var(--border-focus);
}

select#player-type {
  flex-shrink: 0;
  width: 80px;
}

select#player-track {
  flex-grow: 1;
  min-width: 0;
}

.player-box {
  display: flex;
  flex-direction: column;
}

#player-msg {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

#player-msg::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--text-muted);
  opacity: 0.6;
}

audio#player {
  width: 100%;
  height: 38px;
  outline: none;
  border-radius: 4px;
}

/* Calaméo Iframe Container - Compact Height */
.calameo-container {
  margin: 1.25rem 0;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  max-width: 100%;
}

.calameo-container iframe {
  width: 100%;
  height: 180px;
  border: 0;
  display: block;
}

/* Footer */
footer.site-footer {
  margin-top: 3rem;
  padding: 2rem 0 3rem 0;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

.copyleft { 
  display: inline-block;
  transform: rotate(180deg);
}

/* Mobile Responsiveness */
@media (max-width: 550px) {
  button.menu-toggle {
    display: inline-flex;
  }

  .header-top {
    margin-bottom: 0;
  }

  nav.menu {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding-top: 0.75rem;
    margin-top: 0.5rem;
    border-top: 1px solid var(--border-color);
  }

  nav.menu.is-open {
    display: flex;
  }

  nav.menu a {
    padding: 0.55rem 0.65rem;
    font-size: 0.95rem;
  }

  .player-controls-row {
    flex-direction: column;
    align-items: stretch;
  }
  
  select#player-type {
    width: 100%;
  }
}

@media (max-width: 440px) {
  h1.site-title {
    display: none;
  }
}