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

:root {
  --black: #0e0e0e;
  --white: #fafaf8;
  --gray-100: #f4f3f0;
  --gray-200: #e8e6e1;
  --gray-400: #9c9990;
  --gray-600: #5c5a55;
  --gray-800: #2a2925;
  --accent: #1a56db;
  --accent-light: #e8f0fd;
  --accent-dark: #0f3d9e;
  --green: #1a6b3c;
  --green-light: #e6f4ec;
  --amber: #b35c00;
  --amber-light: #fef3e2;
  --red: #b91c1c;
  --red-light: #fef2f2;
  --font-serif: 'DM Serif Display', Georgia, serif;
  --font-sans: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'DM Mono', monospace;
  --radius: 10px;
  --radius-sm: 6px;
  --max-w: 780px;
  --nav-h: 64px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--black);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* === Nav === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  height: var(--nav-h);
  display: flex;
  align-items: center;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.5px;
  color: var(--black);
  margin-right: auto;
}

.dot { color: var(--accent); }

.nav-links {
  list-style: none;
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 400;
  color: var(--gray-600);
  transition: color 0.15s;
}

.nav-links a:hover { color: var(--black); }
.nav-links a.active { color: var(--black); font-weight: 500; }

.btn-small {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.btn-small:hover { background: var(--accent); color: var(--white); }

/* === Buttons === */
.btn {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--white);
  background: var(--black);
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
}
.btn:hover { background: var(--gray-800); }

.btn-ghost {
  display: inline-block;
  font-size: 14px;
  font-weight: 400;
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-200);
  padding-bottom: 1px;
  transition: color 0.15s, border-color 0.15s;
}
.btn-ghost:hover { color: var(--black); border-color: var(--gray-400); }

/* === Hero === */
.hero {
  padding: 80px 24px 64px;
}

.hero-eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--gray-600);
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  padding: 3px 10px;
  border-radius: 100px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(38px, 6vw, 56px);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--black);
  margin-bottom: 20px;
}

.hero-title em {
  font-style: italic;
  color: var(--gray-600);
}

.hero-sub {
  font-size: 17px;
  line-height: 1.65;
  color: var(--gray-600);
  max-width: 560px;
  margin-bottom: 36px;
}

.hero-cta {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

/* === Strip === */
.strip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 24px;
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray-400);
  letter-spacing: 0.02em;
}

.strip .sep { color: var(--gray-200); }

/* === Card Grid === */
.cards-section { padding: 64px 24px; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  display: block;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.15s, transform 0.15s;
  cursor: pointer;
}

.card:hover {
  border-color: var(--gray-400);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 22px;
  margin-bottom: 16px;
}

.card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 400;
  margin-bottom: 10px;
  color: var(--black);
}

.card p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: 20px;
}

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

/* === Posts === */
.posts-section { padding: 0 24px 72px; }

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 28px;
}

.section-header h2 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 400;
}

.view-all {
  font-size: 13px;
  color: var(--gray-400);
  transition: color 0.15s;
}
.view-all:hover { color: var(--black); }

.post-list { display: flex; flex-direction: column; gap: 0; }

.post-row {
  display: block;
  padding: 24px 0;
  border-bottom: 1px solid var(--gray-200);
  transition: background 0.1s;
}

.post-row:first-child { border-top: 1px solid var(--gray-200); }

.post-row:hover .post-title { color: var(--accent); }

.post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.post-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 100px;
}

.post-tag.travel { background: var(--amber-light); color: var(--amber); }
.post-tag.engineering { background: var(--accent-light); color: var(--accent-dark); }
.post-tag.software { background: var(--green-light); color: var(--green); }

.post-date {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--gray-400);
}

.post-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 400;
  color: var(--black);
  margin-bottom: 6px;
  transition: color 0.15s;
}

.post-excerpt {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.6;
}

/* === Travel Section === */
.travel-section { padding: 0 24px 80px; }

.travel-inner {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 48px;
  display: flex;
  align-items: center;
  gap: 48px;
}

.travel-text { flex: 1; }

.travel-text h2 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 12px;
}

.travel-text p {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray-400);
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}

.travel-visual {
  width: 160px;
  height: 160px;
  flex-shrink: 0;
  position: relative;
}

.globe-ring {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 1.5px solid var(--gray-200);
  position: absolute;
  top: 0; left: 0;
}

.globe-ring::after {
  content: '';
  position: absolute;
  top: 50%; left: -1px; right: -1px;
  height: 1.5px;
  background: var(--gray-200);
}

.globe-ring::before {
  content: '';
  position: absolute;
  left: 50%; top: -1px; bottom: -1px;
  width: 1.5px;
  background: var(--gray-200);
}

.globe-dot {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gray-400);
  transform: translate(-50%, -50%);
}

.globe-dot.active {
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* === Footer === */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 24px;
  border-top: 1px solid var(--gray-200);
  font-size: 13px;
  color: var(--gray-400);
}

.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--gray-400); transition: color 0.15s; }
.footer-links a:hover { color: var(--black); }

/* === Page Hero (inner pages) === */
.page-hero {
  padding: 60px 24px 48px;
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: 56px;
}

.page-hero .back {
  font-size: 13px;
  color: var(--gray-400);
  margin-bottom: 20px;
  display: block;
  transition: color 0.15s;
}
.page-hero .back:hover { color: var(--black); }

.page-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.page-hero p {
  font-size: 16px;
  color: var(--gray-600);
  max-width: 520px;
}

/* === About Page === */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 56px;
  padding: 0 24px 80px;
  align-items: start;
}

.about-body h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 400;
  margin: 40px 0 14px;
}

.about-body h2:first-child { margin-top: 0; }

.about-body p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray-800);
  margin-bottom: 16px;
}

.about-sidebar { position: sticky; top: calc(var(--nav-h) + 32px); }

.sidebar-card {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
}

.sidebar-card h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-400);
  margin-bottom: 14px;
}

.sidebar-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar-card li {
  font-size: 13px;
  color: var(--gray-800);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-card li::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--gray-400);
  border-radius: 50%;
  flex-shrink: 0;
}

/* === Experience Page === */
.experience-list {
  padding: 0 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.exp-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 32px;
  padding: 36px 0;
  border-bottom: 1px solid var(--gray-200);
}

.exp-item:first-child { border-top: 1px solid var(--gray-200); }

.exp-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray-400);
  padding-top: 4px;
  letter-spacing: 0.02em;
}

.exp-content {}

.exp-role {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 400;
  margin-bottom: 2px;
  color: var(--black);
}

.exp-company {
  font-size: 13px;
  color: var(--gray-600);
  margin-bottom: 14px;
}

.exp-company .location {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gray-400);
  margin-left: 8px;
}

.exp-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray-600);
  margin-bottom: 14px;
}

.exp-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.exp-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gray-600);
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  padding: 2px 8px;
  border-radius: 100px;
}

/* === Projects Page === */
.projects-grid {
  padding: 0 24px 80px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.project-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s;
}

.project-card:hover { border-color: var(--gray-400); }

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.project-label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray-400);
}

.project-links { display: flex; gap: 10px; }

.project-links a {
  font-size: 12px;
  color: var(--accent);
  transition: opacity 0.15s;
}
.project-links a:hover { opacity: 0.7; }

.project-card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 400;
  margin-bottom: 10px;
  color: var(--black);
}

.project-card p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 20px;
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.stack-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-dark);
  background: var(--accent-light);
  padding: 2px 8px;
  border-radius: 100px;
}

/* === Blog Page === */
.blog-posts {
  padding: 0 24px 80px;
}

.blog-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 5px 14px;
  border-radius: 100px;
  border: 1px solid var(--gray-200);
  background: var(--white);
  color: var(--gray-600);
  cursor: pointer;
  transition: all 0.15s;
  letter-spacing: 0.02em;
}

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

.blog-post-list { display: flex; flex-direction: column; }

/* === Blog Post Page === */
.post-page {
  padding: 0 24px 80px;
  max-width: 660px;
  margin: 0 auto;
}

.post-page-header { margin-bottom: 40px; }

.post-page-title {
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: 14px;
}

.post-page-meta {
  display: flex;
  gap: 12px;
  align-items: center;
}

.post-content p { font-size: 16px; line-height: 1.8; color: var(--gray-800); margin-bottom: 20px; }
.post-content h2 { font-family: var(--font-serif); font-size: 24px; font-weight: 400; margin: 40px 0 16px; }
.post-content h3 { font-size: 17px; font-weight: 500; margin: 28px 0 10px; }
.post-content ul { margin: 0 0 20px 20px; }
.post-content li { font-size: 16px; line-height: 1.75; color: var(--gray-800); margin-bottom: 6px; }
.post-content code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--gray-100);
  padding: 2px 6px;
  border-radius: 4px;
}
.post-content pre {
  background: var(--gray-800);
  color: #e8e6e1;
  border-radius: var(--radius-sm);
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 20px;
}
.post-content pre code { background: none; padding: 0; color: inherit; }
.post-content blockquote {
  border-left: 3px solid var(--accent);
  margin: 0 0 20px;
  padding: 4px 0 4px 20px;
}
.post-content blockquote p { color: var(--gray-600); font-style: italic; }

/* === Responsive === */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .card-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .exp-item { grid-template-columns: 1fr; gap: 8px; }
  .projects-grid { grid-template-columns: 1fr; }
  .travel-inner { flex-direction: column; gap: 28px; }
  .travel-visual { display: none; }
  .hero { padding: 48px 24px 40px; }
}