/* ============================================
   Wim Rietkerk - Website Stylesheet
   Rustig, sober design met focus op leesbaarheid
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #4a6741;
  --color-primary-light: #6b8f71;
  --color-primary-dark: #354d2e;
  --color-accent: #c94c4c;
  --color-warm: #d4a574;
  --color-sand: #f5f0e8;
  --color-sand-light: #faf8f4;
  --color-text: #2c2c2c;
  --color-text-light: #5a5a5a;
  --color-white: #ffffff;
  --color-border: #e0dbd3;
  --font-serif: Georgia, 'Times New Roman', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1100px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.7;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-primary-dark);
  line-height: 1.3;
}

h1 { font-size: 2.2rem; margin-bottom: var(--spacing-md); }
h2 { font-size: 1.7rem; margin-bottom: var(--spacing-sm); }
h3 { font-size: 1.3rem; margin-bottom: var(--spacing-xs); }

p { margin-bottom: var(--spacing-sm); }

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* --- Header & Navigation --- */
.site-header {
  background-color: var(--color-white);
  border-bottom: 2px solid var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-primary-dark);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-title a {
  color: inherit;
}

.site-title a:hover {
  color: var(--color-primary);
}

/* Navigation */
.main-nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.main-nav a {
  display: block;
  padding: 0.4rem 0.8rem;
  color: var(--color-text);
  font-size: 0.95rem;
  border-radius: 4px;
  transition: background-color 0.2s, color 0.2s;
}

.main-nav a:hover,
.main-nav a.active {
  background-color: var(--color-sand);
  color: var(--color-primary-dark);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown > a::after {
  content: ' \25BE';
  font-size: 0.75em;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  min-width: 260px;
  padding: 0.4rem 0;
  z-index: 200;
}

.dropdown-menu a {
  display: block;
  padding: 0.5rem 1rem;
  white-space: nowrap;
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown.open .dropdown-menu {
  display: block;
}

/* Hamburger */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--color-primary-dark);
  padding: 0.3rem;
}

/* --- Hero / Welcome Section --- */
.hero {
  padding: var(--spacing-lg) 0;
  background-color: var(--color-sand-light);
}

.hero-inner {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.hero-photo {
  flex: 0 0 280px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.hero-photo img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.hero-text {
  flex: 1;
}

.hero-text h1 {
  font-size: 2.4rem;
  margin-bottom: var(--spacing-sm);
}

.hero-text .subtitle {
  font-size: 1.15rem;
  color: var(--color-text-light);
  font-style: italic;
  margin-bottom: var(--spacing-sm);
}

.hero-text p {
  font-size: 1.05rem;
}

/* --- Books Section --- */
.books-section {
  padding: var(--spacing-xl) 0;
}

.books-section h2 {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}

.book-card {
  text-align: center;
  transition: transform 0.2s;
}

.book-card:hover {
  transform: translateY(-4px);
}

.book-card a {
  display: block;
  color: inherit;
}

.book-cover {
  width: 100%;
  max-width: 200px;
  margin: 0 auto var(--spacing-sm);
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
  aspect-ratio: 2/3;
  object-fit: cover;
}

.section-link {
  text-align: center;
  margin-top: var(--spacing-md);
}

.section-link a {
  color: var(--color-primary);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.section-link a:hover {
  border-bottom-color: var(--color-primary);
}

.book-card h3 {
  font-size: 1.05rem;
  color: var(--color-primary-dark);
  margin-bottom: 0.3rem;
}

.book-card .book-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-style: italic;
}

.book-card-downloads {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 0.5rem;
}

.book-card-downloads .download-link {
  font-size: 0.8rem;
  padding: 0.3rem 0.8rem;
}

/* --- Themes Section --- */
.themes-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-sand-light);
}

.themes-section h2 {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.themes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.theme-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--spacing-md);
  transition: box-shadow 0.2s, transform 0.2s;
}

.theme-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.theme-card a {
  color: inherit;
  display: block;
}

.theme-card h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
  font-size: 1.2rem;
}

.theme-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 0;
}

.theme-card .theme-count {
  display: inline-block;
  margin-top: var(--spacing-xs);
  font-size: 0.8rem;
  color: var(--color-primary-light);
  background: var(--color-sand);
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
}

/* --- Theme Page Content --- */
.page-header {
  background-color: var(--color-sand-light);
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  margin-bottom: var(--spacing-xs);
}

.page-header .page-intro {
  font-size: 1.1rem;
  color: var(--color-text-light);
  font-style: italic;
  max-width: 700px;
}

.page-content {
  padding: var(--spacing-lg) 0 var(--spacing-xl);
}

/* Content groups on theme pages */
.content-group {
  margin-bottom: var(--spacing-lg);
}

.content-group h2 {
  font-size: 1.4rem;
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid var(--color-sand);
  margin-bottom: var(--spacing-md);
}

.content-item {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-sand);
}

.content-item:last-child {
  border-bottom: none;
}

.content-icon {
  flex: 0 0 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-sand);
  border-radius: 8px;
  font-size: 1.2rem;
}

.content-icon.text { color: var(--color-primary); }
.content-icon.audio { color: var(--color-accent); }
.content-icon.book { color: var(--color-warm); }

.content-details {
  flex: 1;
}

.content-details h3 {
  font-size: 1.05rem;
  font-family: var(--font-sans);
  margin-bottom: 0.2rem;
}

.content-details h3 a {
  color: var(--color-primary-dark);
}

.content-details h3 a:hover {
  color: var(--color-accent);
}

.content-details p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 0.3rem;
}

.content-details .meta {
  font-size: 0.8rem;
  color: var(--color-primary-light);
}

a.download-link {
  display: inline-block;
  margin-top: 0.3rem;
  padding: 0.25rem 0.7rem;
  font-size: 0.8rem;
  color: var(--color-primary);
  background: var(--color-sand);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

a.download-link:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* Audio player */
.audio-player {
  margin-top: 0.5rem;
}

.audio-player audio {
  width: 100%;
  max-width: 400px;
  height: 40px;
}

/* --- Book List (compact) --- */
.book-list-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-sand);
  align-items: flex-start;
}

.book-list-item:last-child {
  border-bottom: none;
}

.book-list-cover {
  flex: 0 0 100px;
}

.book-list-cover img {
  width: 100%;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  aspect-ratio: 2/3;
  object-fit: cover;
}

.book-list-cover.no-cover {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-sand);
  border-radius: 4px;
  aspect-ratio: 2/3;
  font-size: 2rem;
}

.book-list-info {
  flex: 1;
}

.book-list-info h3 {
  font-size: 1.1rem;
  margin-bottom: 0.2rem;
}

.book-list-info h3 a {
  color: var(--color-primary-dark);
}

.book-list-info h3 a:hover {
  color: var(--color-accent);
}

.book-list-info .book-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-light);
  font-style: italic;
  margin-bottom: 0.4rem;
}

.book-list-info p {
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
}

.book-list-info .meta {
  font-size: 0.8rem;
  color: var(--color-primary-light);
}

@media (max-width: 500px) {
  .book-list-cover {
    flex: 0 0 70px;
  }
}

/* --- Book Detail Page --- */
.book-detail {
  padding: var(--spacing-xl) 0;
}

.book-detail-inner {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
}

.book-detail-cover {
  flex: 0 0 280px;
}

.book-detail-cover img {
  width: 100%;
  border-radius: 6px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.book-detail-info {
  flex: 1;
}

.book-detail-info h1 {
  margin-bottom: 0.3rem;
}

.book-detail-info .book-subtitle {
  font-size: 1.2rem;
  color: var(--color-text-light);
  font-style: italic;
  margin-bottom: var(--spacing-md);
}

.book-detail-info .book-description {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.book-meta {
  background: var(--color-sand-light);
  padding: var(--spacing-sm);
  border-radius: 6px;
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}

.book-meta dt {
  font-weight: 600;
  display: inline;
}

.book-meta dd {
  display: inline;
  margin-left: 0;
  margin-right: var(--spacing-sm);
}

.related-theme {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm);
  background: var(--color-sand);
  border-radius: 6px;
  border-left: 4px solid var(--color-primary);
}

.related-theme a {
  font-weight: 600;
}

/* --- About Page --- */
.about-content {
  padding: var(--spacing-xl) 0;
}

.about-inner {
  display: flex;
  gap: var(--spacing-lg);
}

.about-photo {
  flex: 0 0 300px;
}

.about-photo img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.about-text {
  flex: 1;
}

.about-text h2 {
  margin-top: var(--spacing-md);
}

.timeline {
  list-style: none;
  padding-left: var(--spacing-md);
  border-left: 3px solid var(--color-sand);
}

.timeline li {
  position: relative;
  padding: 0.5rem 0 0.5rem var(--spacing-sm);
  font-size: 0.95rem;
}

.timeline li::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--spacing-md) - 5px);
  top: 0.85rem;
  width: 10px;
  height: 10px;
  background: var(--color-primary);
  border-radius: 50%;
}

.timeline .year {
  font-weight: 700;
  color: var(--color-primary-dark);
}

/* --- Contact Page --- */
.contact-content {
  padding: var(--spacing-xl) 0;
  max-width: 600px;
}

/* --- Cross-references --- */
.cross-references {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--color-sand-light);
  border-radius: 8px;
}

.cross-references h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-sans);
}

.cross-references ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.cross-references a {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 0.85rem;
  transition: background 0.2s;
}

.cross-references a:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* --- Footer --- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.8);
  padding: var(--spacing-md) 0;
  text-align: center;
  font-size: 0.85rem;
}

.site-footer a {
  color: rgba(255,255,255,0.9);
}

/* --- Series numbering --- */
.series-list {
  list-style: none;
  counter-reset: series;
}

.series-list li {
  counter-increment: series;
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-sand);
  display: flex;
  gap: var(--spacing-sm);
  align-items: baseline;
}

.series-list li::before {
  content: counter(series);
  flex: 0 0 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 600;
}

.series-list .item-title {
  font-weight: 600;
  color: var(--color-primary-dark);
}

.series-list .item-title a {
  color: inherit;
}

.series-list .item-desc {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .books-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }

  .hero-inner {
    flex-direction: column;
    text-align: center;
  }

  .hero-photo {
    flex: 0 0 auto;
    max-width: 250px;
  }

  .book-detail-inner {
    flex-direction: column;
    align-items: center;
  }

  .book-detail-cover {
    flex: 0 0 auto;
    max-width: 250px;
  }

  .about-inner {
    flex-direction: column;
  }

  .about-photo {
    flex: 0 0 auto;
    max-width: 250px;
  }
}

@media (max-width: 700px) {
  html { font-size: 16px; }

  .menu-toggle { display: block; }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 2px solid var(--color-primary);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  }

  .main-nav.open { display: block; }

  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-xs) 0;
  }

  .main-nav a {
    padding: 0.7rem var(--spacing-md);
    border-radius: 0;
  }

  .dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    border-radius: 0;
    padding-left: var(--spacing-md);
  }

  .nav-dropdown > a::after {
    content: ' \25BE';
  }

  .themes-grid {
    grid-template-columns: 1fr;
  }

  .hero-text h1 {
    font-size: 1.8rem;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }
}