@import url('https://fonts.googleapis.com/css2?family=Ubuntu:ital,wght@0,300;0,400;0,500;0,700;1,300;1,400&display=swap');

:root {
  --color-bg: #f9f8f6; /* Warm off-white */
  --color-text: #2d2c2a; /* Soft charcoal */
  --color-accent: #8b7d6b; /* Muted taupe / earth */
  --color-border: #e6e4df;
  --color-surface: #ffffff;
  
  --font-sans: 'Ubuntu', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: 'Ubuntu', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 1rem;
}

h1 {
  font-size: 3rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.25rem;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
  cursor: pointer;
}

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

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Base Layout Classes */
.header {
  padding: 3rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 4rem;
}

.logo a {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 400;
}

.footer {
  margin-top: 6rem;
  padding: 3rem 0;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: #666;
}

/* Card classes for articles/poems */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 2rem;
  border-radius: 4px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.03);
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.card-date {
  font-size: 0.875rem;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
}

.card-excerpt {
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.card-link {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--color-accent);
}

.card-link:hover {
  color: var(--color-text);
}

/* Lang Switcher */
.lang-switch {
  display: flex;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.lang-switch span.lang-btn {
  opacity: 0.5;
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.lang-switch span.lang-btn:hover {
  opacity: 0.8;
}

.lang-switch span.lang-btn.active {
  opacity: 1;
  font-weight: 600;
}

/* Base Content */
.content {
  max-width: 700px;
  margin: 0 auto;
  font-size: 1.1rem;
  line-height: 1.8;
  text-align: justify;
}

.content h2 {
  margin-top: 3rem;
}

.content p {
  margin-bottom: 1.5rem;
  text-align: justify;
}

/* --- Reader Book Layout --- */
.reader-container {
  display: flex;
  align-items: flex-start;
  gap: 4rem;
  position: relative;
}

.reader-sidebar {
  width: 250px;
  flex-shrink: 0;
  position: sticky;
  top: 2rem;
}

.chapter-list {
  margin-top: 1.5rem;
}

.chapter-item {
  margin-bottom: 1.5rem;
}

.chapter-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.5rem;
}

.part-list {
  list-style: none;
  padding-left: 0.5rem;
}

.part-item {
  padding: 0.25rem 0;
  font-size: 0.95rem;
  color: #666;
  cursor: pointer;
  transition: color 0.2s;
}

.part-item:hover {
  color: var(--color-accent);
}

.part-item.active {
  color: var(--color-text);
  font-weight: 600;
}

.open-sidebar-btn {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-family: var(--font-sans);
  cursor: pointer;
  margin-bottom: 2rem;
}

.close-sidebar-btn {
  display: none;
}

.reader-content {
  flex-grow: 1;
  max-width: 700px;
}

/* Video Player */
.video-container {
  margin: 2rem 0;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.video-container video {
  width: 100%;
  display: block;
}

/* Pagination Controls */
.pagination-controls {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.page-btn {
  background: transparent;
  border: 1px solid var(--color-border);
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.2s;
}

.page-btn:hover:not(:disabled) {
  border-color: var(--color-text);
  color: var(--color-text);
}

.page-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.page-indicator {
  font-size: 0.9rem;
  color: #888;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* --- Reflexiones Layout --- */
.quote-layout {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.quote-image-container {
  margin-bottom: 3rem;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.quote-image {
  width: 100%;
  display: block;
  object-fit: cover;
  max-height: 500px;
}

.quote-text-container {
  margin-bottom: 3rem;
  padding: 0 2rem;
}

.quote-text {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 2.5rem;
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.quote-author {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.reflection-content {
  text-align: left;
  border-top: 1px solid var(--color-border);
  padding-top: 3rem;
}

/* Responsive */
@media (max-width: 900px) {
  .reader-container {
    flex-direction: column;
    gap: 2rem;
  }
  
  .reader-sidebar {
    position: fixed;
    top: 0;
    left: -300px;
    width: 280px;
    height: 100vh;
    background: var(--color-bg);
    z-index: 100;
    padding: 2rem;
    box-shadow: 4px 0 15px rgba(0,0,0,0.05);
    transition: left 0.3s ease;
    overflow-y: auto;
  }
  
  .reader-sidebar.mobile-open {
    left: 0;
  }
  
  .open-sidebar-btn {
    display: inline-block;
  }
  
  .close-sidebar-btn {
    display: block;
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
  }
  
  .header {
    flex-direction: column;
    gap: 1.5rem;
    padding: 2rem 0;
  }
  
  .nav {
    flex-wrap: wrap;
    justify-content: center;
  }
}