/* ── Variables ── */
:root {
  --bg:        #0d0f14;
  --bg2:       #12151c;
  --bg3:       #181c26;
  --surface:   #1e2333;
  --border:    #262d3f;
  --text:      #c8cfe0;
  --text-dim:  #6b778f;
  --text-mute: #3d4557;
  --accent:    #ff6b35;
  --accent2:   #ff9500;
  --white:     #eef0f6;
  --mono:      'JetBrains Mono', monospace;
  --display:   'Syne', sans-serif;
  --body:      'Lora', serif;
  --radius:    4px;
  --max:       720px;
  --max-wide:  1100px;
}

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

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 1.05rem;
  line-height: 1.75;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── Noise texture overlay ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent2); }

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

/* ── Layout ── */
.container { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }
.container--wide { max-width: var(--max-wide); margin: 0 auto; padding: 0 2rem; }

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 15, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0 2rem;
  height: 60px;
}

.nav__brand {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.05em;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav__brand::before {
  content: '~/';
  color: var(--accent);
  font-weight: 300;
}

.brand-short { display: none; }

.nav__links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav__links a {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  transition: color 0.2s;
}

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

/* ── Hero (homepage) ── */
.hero {
  padding: 5rem 0 4rem;
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--border), transparent);
}

.hero__label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.hero__label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.hero__title {
  font-family: var(--display);
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero__title span {
  color: var(--accent);
}

.hero__desc {
  font-family: var(--body);
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero__meta {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-mute);
  letter-spacing: 0.05em;
}

/* ── Section label ── */
.section-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--accent);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
  max-width: 200px;
}

/* ── Post list ── */
.posts { padding: 4rem 0; }

.post-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 1.5rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
  transition: border-color 0.2s;
}

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

.post-item__date {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-mute);
  letter-spacing: 0.05em;
  padding-top: 0.3rem;
  line-height: 1.4;
}

.post-item__body {}

.post-item__meta-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.post-item__cats {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pin-badge {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.7;
}

.post-item--pinned {
  border-left: 2px solid var(--accent);
  padding-left: 1rem;
}

.post-item--pinned .post-item__title a {
  color: var(--white);
}

.cat-tag {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(255, 107, 53, 0.08);
  border: 1px solid rgba(255, 107, 53, 0.2);
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
}

.post-item__title {
  font-family: var(--display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.3;
  margin-bottom: 0.5rem;
  transition: color 0.2s;
}

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

.post-item__desc {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ── Single post ── */
.post { padding: 4rem 0; }

.post__header { margin-bottom: 3rem; }

.post__cats {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.post__title {
  font-family: var(--display);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.post__meta {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-mute);
  letter-spacing: 0.08em;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.post__divider {
  height: 1px;
  background: linear-gradient(to right, var(--accent), transparent);
  margin: 2rem 0 3rem;
}

/* ── Post content typography ── */
.post__content h1,
.post__content h2,
.post__content h3,
.post__content h4 {
  font-family: var(--display);
  color: var(--white);
  margin: 2.5rem 0 1rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.post__content h2 { font-size: 1.6rem; font-weight: 700; }
.post__content h3 { font-size: 1.2rem; font-weight: 600; }

.post__content p { margin-bottom: 1.5rem; color: var(--text); }

.post__content a { border-bottom: 1px solid rgba(255,107,53,0.4); padding-bottom: 1px; }
.post__content a:hover { border-color: var(--accent); }

.post__content ul,
.post__content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.post__content li { margin-bottom: 0.4rem; }

.post__content blockquote {
  border-left: 3px solid var(--accent);
  margin: 2rem 0;
  padding: 1rem 1.5rem;
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--text-dim);
}

.post__content code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--surface);
  color: var(--accent2);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  border: 1px solid var(--border);
}

.post__content pre {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  overflow-x: auto;
  margin: 2rem 0;
}

.post__content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text);
}

.post__content hr {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 3rem 0;
}

/* ── About page ── */
.about-page { padding: 4rem 0; }

.about__hero {
  margin-bottom: 4rem;
}

.about__name {
  font-family: var(--display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.about__role {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.about__bio {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 560px;
  line-height: 1.75;
  margin-bottom: 2rem;
}

.about__links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.about__link {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  transition: all 0.2s;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.about__link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(255,107,53,0.05);
}

/* ── Skills ── */
.skills { margin-bottom: 4rem; }

.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.skill-block {
  background: var(--bg2);
  padding: 1.5rem;
  transition: background 0.2s;
}

.skill-block:hover { background: var(--bg3); }

.skill-block__label {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.skill-block__items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.skill-pill {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  letter-spacing: 0.03em;
}

/* ── Projects ── */
.projects { margin-bottom: 4rem; }

.project-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 1px;
  background: var(--bg2);
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.2s;
}

.project-card:hover { background: var(--bg3); border-color: var(--accent); }
.project-card:hover::before { opacity: 1; }

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

.project-card__label {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.project-card__year {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text-mute);
  letter-spacing: 0.05em;
}

.project-card__title {
  font-family: var(--display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.project-card__desc {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.project-tag {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--text-mute);
  border: 1px solid var(--border);
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  letter-spacing: 0.05em;
}

/* ── How I Write ── */
.how-i-write {
  margin-bottom: 4rem;
}

.how-i-write__content {
  border-left: 2px solid var(--border);
  padding-left: 1.5rem;
  max-width: 600px;
}

.how-i-write__content p {
  font-family: var(--body);
  font-size: 0.95rem;
  color: var(--text-dim);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.how-i-write__content p:last-child {
  margin-bottom: 0;
  color: var(--text);
}

/* ── Contact ── */
.contact { margin-bottom: 4rem; }

.contact__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.contact__item {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  transition: all 0.2s;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  letter-spacing: 0.05em;
}

.contact__item:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(255,107,53,0.05);
}

.contact__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* ── Ghost ── */
.nav-ghost {
  position: absolute;
  pointer-events: auto;
  opacity: 0.72;
  filter: drop-shadow(0 0 3px rgba(255, 107, 53, 0.25));
  transition: filter 0.15s;
  cursor: pointer;
}

.ghost-tooltip {
  position: absolute;
  top: 110%;
  left: 0;
  width: 240px;
  background: #1e2333;
  border: 1px solid #ff6b35;
  border-radius: 4px;
  padding: 0.6rem 0.85rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  line-height: 1.55;
  color: #c8cfe0;
  pointer-events: none;
  z-index: 200;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.2s, transform 0.2s;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4), 0 0 12px rgba(255,107,53,0.15);
}

.ghost-tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 4rem;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0 2rem;
}

.footer__brand {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-mute);
  letter-spacing: 0.05em;
}

.footer__brand span { color: var(--accent); }

.footer__copy {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-mute);
  letter-spacing: 0.05em;
}

/* ── Pagination ── */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 0;
  margin-top: 2rem;
  border-top: 1px solid var(--border);
}

.pagination a {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  transition: all 0.2s;
}

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

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-up { animation: fadeUp 0.5s ease both; }
.fade-up-1 { animation-delay: 0.1s; }
.fade-up-2 { animation-delay: 0.2s; }
.fade-up-3 { animation-delay: 0.3s; }
.fade-up-4 { animation-delay: 0.4s; }

/* ── Diagram scroll wrapper (added by shortcodes) ── */
.diagram-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 2rem 0;
}

.diagram-scroll svg {
  display: block;
  min-width: 560px;
}

/* ── Responsive ── */
@media (max-width: 640px) {
  /* Nav: shorten brand, tighten links */
  .nav__inner { padding: 0 1rem; }
  .nav__brand::before { content: '~/'; }
  .nav__brand .brand-full { display: none; }
  .nav__brand .brand-short { display: inline; }
  .nav__links { gap: 1rem; }
  .nav__links a { font-size: 0.68rem; }

  /* Hero */
  .hero { padding: 2.5rem 0 2rem; }

  /* Post list */
  .post-item { grid-template-columns: 1fr; gap: 0.4rem; }
  .post-item__date { padding-top: 0; font-size: 0.65rem; }
  .post-item--pinned { padding-left: 0.75rem; }

  /* Post content */
  .post__content pre { padding: 1rem; font-size: 0.78rem; }
  .container { padding: 0 1rem; }

  /* About page */
  .skills__grid { grid-template-columns: 1fr; }
  .about__links { flex-direction: column; }
  .contact__grid { flex-direction: column; }

  /* Footer */
  .footer__inner { flex-direction: column; align-items: flex-start; gap: 0.5rem; padding: 0 1rem; }
}