/* ============================================
   Xavier Tai - Personal Brand Site
   Design: Muted, card-based, professional
   ============================================ */

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

:root {
  --color-bg: #e5e2dc;
  --color-card: #f0ede8;
  --color-text: #2d2d2d;
  --color-text-muted: #5a5a5a;
  --color-accent: #2d2d2d;
  --color-border: #d5d2cc;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-hover: 0 4px 12px rgba(0,0,0,0.08), 0 8px 24px rgba(0,0,0,0.06);
  --max-width: 1200px;
  --spacing: 24px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* Typography */
h1, h2, h3 {
  font-weight: 600;
  line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }

@media (max-width: 768px) {
  h1 { font-size: 1.875rem; }
  h2 { font-size: 1.5rem; }
}

/* Components */
.card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: var(--spacing);
  box-shadow: var(--shadow);
}

.card-link {
  display: block;
  transition: box-shadow 0.2s, transform 0.2s;
}

.card-link:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 50px;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: #333;
}

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

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px var(--spacing);
  background: var(--color-bg);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 2.5rem;
  line-height: 1;
}

.logo-xavier {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  font-style: normal;
}

.logo-tai {
  font-family: 'Playfair Display', serif;
  font-weight: 400;
  font-style: italic;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-card);
  padding: 8px;
  border-radius: 50px;
  box-shadow: var(--shadow);
}

.nav-link {
  padding: 8px 16px;
  font-size: 0.9375rem;
  border-radius: 50px;
  transition: background 0.2s;
}

.nav-link:hover {
  background: var(--color-bg);
}

.nav-cta {
  padding: 8px 20px;
  background: var(--color-text);
  color: white;
  border-radius: 50px;
  font-size: 0.9375rem;
  font-weight: 500;
}

.nav-cta:hover {
  background: #333;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: var(--color-card);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  transition: all 0.2s;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 80px;
  left: var(--spacing);
  right: var(--spacing);
  background: var(--color-card);
  border-radius: var(--radius);
  padding: var(--spacing);
  box-shadow: var(--shadow-hover);
  flex-direction: column;
  gap: 16px;
  z-index: 99;
}

.mobile-menu a {
  padding: 12px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.mobile-menu a:hover {
  background: var(--color-bg);
}

.mobile-menu.active {
  display: flex;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-status {
    display: none;
  }
}

/* Hero */
.hero {
  padding: 60px var(--spacing) 80px;
}

.hero-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-intro {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.hero-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
}

.hero-intro-text {
  display: flex;
  flex-direction: column;
}

.hero-name {
  font-weight: 600;
}

.hero-role {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.hero-title {
  font-size: 3rem;
  margin-bottom: 20px;
  line-height: 1.1;
}

.hero-highlight {
  color: var(--color-text);
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  max-width: 500px;
}

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

.hero-image {
  background: var(--color-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero-image img {
  width: 100%;
  height: auto;
}

@media (max-width: 968px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .hero-image {
    order: -1;
    max-width: 400px;
  }
}

/* Features */
.features {
  padding: 0 var(--spacing) 80px;
}

.features-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing);
}

.features .card h3 {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.features .card ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.features .card li {
  position: relative;
  padding-left: 20px;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.features .card li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

@media (max-width: 768px) {
  .features-container {
    grid-template-columns: 1fr;
  }
}

/* CTA Section */
.cta-section {
  padding: 0 var(--spacing) 80px;
}

.cta-container {
  max-width: 800px;
  margin: 0 auto;
}

.card-cta {
  text-align: center;
  padding: 48px var(--spacing);
}

.card-cta h2 {
  margin-bottom: 16px;
}

.card-cta p {
  color: var(--color-text-muted);
  margin-bottom: 24px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* Single Page */
.single {
  padding: 60px var(--spacing) 80px;
}

.single-container {
  max-width: 720px;
  margin: 0 auto;
}

.single-header {
  margin-bottom: 32px;
}

.single-header time {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.single-header h1 {
  margin-top: 8px;
}

.single-description {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-top: 16px;
}

.single-featured-image {
  width: 100%;
  border-radius: var(--radius);
  margin-bottom: 32px;
  box-shadow: var(--shadow);
}

.single-content {
  font-size: 1.0625rem;
  line-height: 1.75;
}

.single-content h2 {
  margin-top: 40px;
  margin-bottom: 16px;
}

.single-content h3 {
  margin-top: 32px;
  margin-bottom: 12px;
}

.single-content p {
  margin-bottom: 20px;
}

.single-content ul, .single-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.single-content li {
  margin-bottom: 8px;
  list-style: disc;
}

.single-content ol li {
  list-style: decimal;
}

.single-content a {
  color: var(--color-text);
  text-decoration: underline;
}

.single-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 20px;
  margin: 24px 0;
  color: var(--color-text-muted);
  font-style: italic;
}

.single-content code {
  background: var(--color-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.single-content pre {
  background: var(--color-text);
  color: white;
  padding: 20px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin-bottom: 20px;
}

.single-content pre code {
  background: none;
  padding: 0;
}

/* List / Blog */
.list {
  padding: 60px var(--spacing) 80px;
}

.list-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.list-header {
  margin-bottom: 40px;
}

.list-header h1 {
  margin-bottom: 8px;
}

.list-header p {
  color: var(--color-text-muted);
}

.list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing);
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.card-content time {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.card-content h2 {
  font-size: 1.25rem;
  margin: 8px 0;
}

.card-content p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.card-read {
  font-size: 0.875rem;
  color: var(--color-text);
  font-weight: 500;
}

.list-empty {
  text-align: center;
  padding: 60px var(--spacing);
  color: var(--color-text-muted);
}

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

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

.footer-container p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color 0.2s;
}

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