/* ── Variables ─────────────────────────────────────────────── */
:root {
  --white: #f5f4f0;
  --black: #111110;
  --gray-100: #ebebea;
  --gray-200: #d8d8d6;
  --gray-400: #a0a09e;
  --gray-600: #6b6b69;
  --gray-800: #2e2e2c;
  --ff-sans: 'DM Sans', sans-serif;
  --ff-mono: 'DM Mono', monospace;
}

[data-theme="dark"] {
  --white: #111110;
  --black: #f0efeb;
  --gray-100: #1e1e1c;
  --gray-200: #2e2e2c;
  --gray-400: #6b6b69;
  --gray-600: #a0a09e;
  --gray-800: #d8d8d6;
}

[data-theme="dark"] nav {
  background: rgba(17, 17, 16, 0.92);
}

[data-theme="dark"] .nav-links {
  background: rgba(17, 17, 16, 0.96);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--white);
  color: var(--black);
  font-family: var(--ff-sans);
  font-weight: 400;
  line-height: 1.6;
}

::-webkit-scrollbar {
  width: 3px;
}

::-webkit-scrollbar-thumb {
  background: var(--gray-200);
}

/* ── Nav ───────────────────────────────────────────────────── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 3rem;
  height: 60px;
  background: rgba(245, 244, 240, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--gray-100);
}

.nav-logo {
  font-family: var(--ff-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--black);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.8rem;
  color: var(--gray-600);
  text-decoration: none;
  transition: color 0.2s;
}

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

.nav-cv {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  background: var(--black);
  color: var(--white) !important;
  padding: 0.4rem 0.9rem;
}

.nav-cv:hover {
  opacity: 0.75;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--gray-200);
  color: var(--gray-600);
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: border-color 0.2s, color 0.2s;
}

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

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--gray-200);
  cursor: pointer;
  width: 32px;
  height: 32px;
  padding: 0;
  transition: border-color 0.2s;
}

.nav-hamburger span {
  display: block;
  width: 14px;
  height: 1.5px;
  background: var(--gray-600);
  transition: background 0.2s;
}

.nav-hamburger:hover {
  border-color: var(--black);
}

.nav-hamburger:hover span {
  background: var(--black);
}

/* ── Main layout ───────────────────────────────────────────── */
main {
  padding: 8rem 3rem 6rem;
  max-width: 860px;
  margin: 0 auto;
}

/* Post pages use a narrower column */
main.post-main {
  max-width: 680px;
}

/* ── Blog listing ──────────────────────────────────────────── */
.label {
  font-family: var(--ff-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 3rem;
}

.label::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--gray-200);
}

.page-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 3.5rem;
}

.page-title strong {
  font-weight: 600;
}

.empty-state {
  text-align: center;
  padding: 5rem 2rem;
  border: 1px solid var(--gray-100);
}

.empty-icon {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  display: block;
}

.empty-title {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 0.8rem;
}

.empty-desc {
  font-size: 0.85rem;
  color: var(--gray-600);
  line-height: 1.8;
  max-width: 360px;
  margin: 0 auto 2rem;
  font-weight: 300;
}

.empty-link {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  color: var(--gray-600);
  text-decoration: none;
  border-bottom: 1px solid var(--gray-200);
  padding-bottom: 0.1rem;
  transition: color 0.15s, border-color 0.15s;
}

.empty-link:hover {
  color: var(--black);
  border-color: var(--black);
}

.posts-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--gray-100);
}

.post-row {
  background: var(--white);
  padding: 1.8rem 2rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
  text-decoration: none;
  color: var(--black);
  transition: background 0.2s;
}

.post-row:hover {
  background: #f0efeb;
}

[data-theme="dark"] .post-row:hover {
  background: #1a1a18;
}

.post-tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}

.post-tag {
  font-family: var(--ff-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--gray-100);
  color: var(--gray-600);
  padding: 0.15rem 0.5rem;
}

.post-title {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.post-summary {
  font-size: 0.82rem;
  color: var(--gray-600);
  line-height: 1.7;
  font-weight: 300;
}

.post-meta {
  text-align: right;
  flex-shrink: 0;
}

.post-date {
  font-family: var(--ff-mono);
  font-size: 0.68rem;
  color: var(--gray-400);
  display: block;
  margin-bottom: 0.3rem;
}

.post-read {
  font-family: var(--ff-mono);
  font-size: 0.68rem;
  color: var(--gray-400);
  display: block;
  margin-bottom: 1rem;
}

.post-arrow {
  font-family: var(--ff-mono);
  font-size: 0.68rem;
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-200);
  padding-bottom: 0.1rem;
  transition: color 0.15s, border-color 0.15s;
}

.post-row:hover .post-arrow {
  color: var(--black);
  border-color: var(--black);
}

/* ── Post page ─────────────────────────────────────────────── */
.post-main .post-tags {
  margin-bottom: 1rem;
}

.post-main .post-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 300;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.back-link {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  color: var(--gray-600);
  text-decoration: none;
  border-bottom: 1px solid var(--gray-200);
  padding-bottom: 0.1rem;
  transition: color 0.15s, border-color 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 3rem;
}

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

.post-meta-row {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--gray-100);
}

.post-meta-item {
  font-family: var(--ff-mono);
  font-size: 0.68rem;
  color: var(--gray-400);
}

.post-content {
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--gray-600);
  font-weight: 300;
}

.post-content p {
  margin-bottom: 1.4rem;
}

.post-content h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--black);
  margin: 2.5rem 0 0.8rem;
  letter-spacing: -0.01em;
}

.post-content h3 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--black);
  margin: 2rem 0 0.6rem;
}

.post-content blockquote {
  border-left: 2px solid var(--gray-200);
  padding-left: 1.2rem;
  margin: 1.8rem 0;
  font-style: italic;
  color: var(--gray-600);
}

.post-content code {
  font-family: var(--ff-mono);
  font-size: 0.82rem;
  background: var(--gray-100);
  padding: 0.1rem 0.4rem;
  color: var(--black);
}

.post-content pre {
  background: var(--gray-100);
  padding: 1.2rem;
  margin: 1.5rem 0;
  overflow-x: auto;
}

.post-content pre code {
  background: none;
  padding: 0;
  font-size: 0.8rem;
  line-height: 1.7;
}

.post-content img {
  width: 100%;
  margin: 1.5rem 0;
  display: block;
}

.post-content ul,
.post-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.4rem;
}

.post-content li {
  margin-bottom: 0.4rem;
}

.post-content a {
  color: var(--black);
  border-bottom: 1px solid var(--gray-200);
  text-decoration: none;
  transition: border-color 0.15s;
}

.post-content a:hover {
  border-color: var(--black);
}

.post-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--gray-100);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.post-footer-link {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  color: var(--gray-600);
  text-decoration: none;
  border-bottom: 1px solid var(--gray-200);
  padding-bottom: 0.1rem;
  transition: color 0.15s, border-color 0.15s;
}

.post-footer-link:hover {
  color: var(--black);
  border-color: var(--black);
}

.not-found {
  text-align: center;
  padding: 5rem 2rem;
}

.not-found h2 {
  font-size: 1.5rem;
  font-weight: 300;
  margin-bottom: 1rem;
}

.not-found p {
  color: var(--gray-600);
  font-size: 0.85rem;
  margin-bottom: 2rem;
}

/* ── Footer ────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--gray-100);
  padding: 1.5rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-t {
  font-family: var(--ff-mono);
  font-size: 0.68rem;
  color: var(--gray-400);
}

/* ── Accessibility ─────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--black);
  outline-offset: 2px;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 860px) {
  nav {
    padding: 0 1.5rem;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(245, 244, 240, 0.96);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--gray-100);
    padding: 0.5rem 1.5rem 1rem;
    z-index: 199;
    gap: 0;
  }

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

  .nav-links li {
    display: block;
  }

  .nav-links a {
    display: block;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-100);
  }

  .nav-links li:last-child a {
    border-bottom: none;
  }

  .nav-hamburger {
    display: flex;
  }

  main {
    padding: 6rem 1.5rem 4rem;
  }

  .post-row {
    grid-template-columns: 1fr;
  }

  .post-meta {
    text-align: left;
  }

  footer {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}

/* ── Reduced motion ────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}