/* ===================================================
   William Younie — Personal Website
   =================================================== */

@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Inter:wght@300;400;500;600&display=swap');

/* --- Custom Properties --- */
:root {
  --color-bg: #FAFAF8;
  --color-surface: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-muted: #6B7280;
  --color-accent: #16613A;
  --color-accent-hover: #0F4A2C;
  --color-accent-light: #E8F5EE;
  --color-border: #E5E7EB;
  --color-tag-bg: #F0F4F0;
  --color-tag-text: #2D6A4F;

  --font-serif: 'Lora', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --max-width: 1200px;
  --content-width: 760px;
  --nav-height: 64px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);

  --transition: 150ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-logo:hover {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
  letter-spacing: 0.01em;
}

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

/* Mobile nav */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.content-container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Page Header --- */
.page-header {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 48px;
}

.page-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.page-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.page-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 16px;
}

.page-description {
  font-size: 17px;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 640px;
}

/* --- Hero (Home Page) --- */
.hero {
  padding: 80px 0 64px;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 80px;
  align-items: start;
}

.hero-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: 24px;
}

.hero-bio {
  font-size: 18px;
  line-height: 1.75;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  border: none;
}

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

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

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-accent);
}

/* Hero stats / sidebar */
.hero-sidebar {
  padding-top: 8px;
}

.hero-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.hero-card h3 {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.experience-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.experience-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.exp-company {
  font-weight: 600;
  font-size: 14px;
  color: var(--color-text);
}

.exp-role {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* --- Section Divider --- */
.section {
  padding: 64px 0;
}

.section-border {
  border-top: 1px solid var(--color-border);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 32px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.section-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-accent);
}

/* --- Post Cards --- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.post-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.post-card:hover {
  box-shadow: var(--shadow-md);
  border-color: #D1D5DB;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.post-date {
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.post-tag {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.post-card-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: 10px;
}

.post-card-excerpt {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  flex-grow: 1;
}

.post-card-footer {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.read-more {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* --- Newsletter List (Short Form) --- */
.newsletter-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.newsletter-item {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 16px 24px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  transition: background var(--transition);
}

.newsletter-item:first-child {
  border-top: 1px solid var(--color-border);
}

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

.newsletter-date {
  font-size: 13px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.newsletter-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition);
}

.newsletter-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.newsletter-topic {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 7px;
  border-radius: 100px;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  white-space: nowrap;
}

.newsletter-arrow {
  color: var(--color-text-muted);
  font-size: 16px;
}

/* --- Filters / Tags --- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.filter-btn {
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

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

/* --- Bookshelf Grid --- */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 28px;
}

.book-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  cursor: default;
}

.book-cover {
  aspect-ratio: 2/3;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-tag-bg);
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-cover-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-accent-light) 0%, #C8E6D4 100%);
  font-family: var(--font-serif);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-accent);
  text-align: center;
  padding: 16px;
  line-height: 1.4;
}

.book-card:hover .book-cover {
  box-shadow: var(--shadow-md);
}

.book-title {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: 4px;
}

.book-author {
  font-size: 12px;
  color: var(--color-text-muted);
}

.book-topic {
  font-size: 11px;
  color: var(--color-tag-text);
  font-weight: 500;
  margin-top: 4px;
}

/* --- Contact / CTA --- */
.contact-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  margin: 48px 0;
}

.contact-section h2 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
}

.contact-section p {
  color: var(--color-text-muted);
  margin-bottom: 24px;
  font-size: 16px;
}

.contact-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Article / Post Page --- */
.article-header {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 48px;
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  text-decoration: none;
  transition: color var(--transition);
}

.article-back:hover {
  color: var(--color-accent);
}

.article-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-light);
  color: var(--color-accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.article-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 16px;
}

.article-meta {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* Article body styles */
.article-body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text);
  padding-bottom: 80px;
}

.article-body h1,
.article-body h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin: 48px 0 16px;
}

.article-body h1 { font-size: 28px; }
.article-body h2 { font-size: 24px; }
.article-body h3 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin: 36px 0 12px;
}

.article-body h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin: 28px 0 8px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 20px 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 4px 0 4px 20px;
  margin: 28px 0;
  color: var(--color-text-muted);
  font-style: italic;
}

.article-body blockquote p {
  margin-bottom: 8px;
}

.article-body a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.article-body img {
  border-radius: var(--radius-md);
  margin: 32px auto;
  max-width: 100%;
  box-shadow: var(--shadow-sm);
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 40px 0;
}

.article-body strong {
  font-weight: 600;
  color: var(--color-text);
}

.article-body em {
  font-style: italic;
}

.article-body code {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 14px;
  background: var(--color-tag-bg);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--color-text);
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-name {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  font-size: 13px;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

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

.footer-copy {
  font-size: 12px;
  color: var(--color-text-muted);
  width: 100%;
}

/* --- Utility --- */
.hidden { display: none !important; }
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent); }

/* --- Loading State --- */
.loading {
  text-align: center;
  padding: 80px 24px;
  color: var(--color-text-muted);
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-sidebar {
    padding-top: 0;
  }
}

@media (max-width: 700px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 12px 24px;
    font-size: 15px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav {
    position: relative;
  }

  .newsletter-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .newsletter-arrow {
    display: none;
  }

  .book-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 20px;
  }

  .contact-section {
    padding: 28px 20px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}