:root {
  --bg: #ffffff;
  --bg-soft: #f6f6f7;
  --text: #16181d;
  --muted: #6b7280;
  --border: #e6e7eb;
  --accent: #2f6feb;
  --accent-soft: rgba(47, 111, 235, 0.1);
  --radius: 10px;
  --maxw: 44rem;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

[data-theme="dark"] {
  --bg: #0e0f13;
  --bg-soft: #16181d;
  --text: #e7e8ea;
  --muted: #8b8f98;
  --border: #23262d;
  --accent: #6ea8ff;
  --accent-soft: rgba(110, 168, 255, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.75rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.95rem;
}

.brand-mark {
  color: var(--accent);
}

.brand-name {
  color: var(--text);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--muted);
  transition: color 0.15s ease;
}

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

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.icon-moon {
  display: none;
}

[data-theme="dark"] .icon-sun {
  display: none;
}

[data-theme="dark"] .icon-moon {
  display: inline;
}

/* Main */
main.container {
  flex: 1 0 auto;
  padding-top: 2.25rem;
  padding-bottom: 3rem;
}

.hero,
.section {
  scroll-margin-top: 4.75rem;
}

/* Hero */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.hero-title {
  font-size: clamp(2rem, 6vw, 2.7rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  line-height: 1.1;
}

.hero-bio {
  font-size: 1.075rem;
  color: var(--muted);
  max-width: 38rem;
}

.hero-bio p {
  margin: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  background: var(--bg-soft);
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

/* Sections */
.section {
  margin-top: 2.75rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.1rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  margin: 0;
}

.section-title::before {
  content: "# ";
  color: var(--accent);
}

.section-more {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  transition: color 0.15s ease;
  white-space: nowrap;
}

.section-more:hover {
  color: var(--accent);
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem 2rem;
}

.skill-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0 0 0.7rem;
  letter-spacing: 0.02em;
}

.skill-items {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.skill-item {
  font-size: 0.85rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text);
}

/* Projects */
.project-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-card {
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

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

.project-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.project-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}

.project-link {
  color: var(--muted);
  display: inline-flex;
  transition: color 0.15s ease;
}

.project-link:hover {
  color: var(--accent);
}

.project-summary {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0 0 0.9rem;
}

.tech-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
}

/* Post lists */
.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.post-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
}

.post-link {
  font-size: 1rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

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

.post-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  white-space: nowrap;
}

.empty-note {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

/* Page head (list/single) */
.page-head {
  margin-bottom: 2rem;
}

.page-title {
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}

.page-intro {
  color: var(--muted);
}

.page-intro p {
  margin: 0;
}

/* Single post */
.post-header {
  margin-bottom: 2rem;
}

.back-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  transition: color 0.15s ease;
}

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

.post-title-lg {
  font-size: clamp(1.9rem, 5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0.9rem 0 0.6rem;
}

.post-meta {
  display: flex;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

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

.prose {
  font-size: 1.05rem;
  color: var(--text);
}

.prose p {
  margin: 0 0 1.15rem;
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: 0.1rem 0.35rem;
  border-radius: 5px;
}

.prose pre {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
}

.prose pre code {
  border: 0;
  padding: 0;
  background: none;
}

/* Footer */
.site-footer {
  flex-shrink: 0;
  border-top: 1px solid var(--border);
  padding: 1.75rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.footer-links a {
  color: var(--muted);
  transition: color 0.15s ease;
}

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

/* Responsive */
@media (max-width: 40rem) {
  .skills-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .nav {
    gap: 0.9rem;
  }

  .nav-link {
    font-size: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}