/* ============================================
   tokens
   ============================================ */
:root {
  --bg: #0a0a0a;
  --bg-elev: #111111;
  --bg-card: #0f0f0f;
  --border: #1f1f1f;
  --border-strong: #2a2a2a;
  --text: #ededed;
  --text-dim: #a1a1aa;
  --text-faint: #71717a;
  --accent: #00ff9c;
  --accent-glow: rgba(0, 255, 156, 0.15);
  --danger: #ff4d6d;
  --warn: #ffb84d;

  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --font-serif: 'Instrument Serif', 'Iowan Old Style', Georgia, serif;
  --font-sans: 'Geist', -apple-system, BlinkMacSystemFont, sans-serif;

  --max-width: 880px;
  --radius: 6px;
  --radius-lg: 12px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
}

/* subtle radial atmosphere */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow), transparent 70%),
    radial-gradient(ellipse 50% 50% at 80% 100%, rgba(80, 80, 255, 0.08), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* grain overlay */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.04;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

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

/* ============================================
   header
   ============================================ */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 10, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.brand {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text);
}

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

.brand-cursor {
  color: var(--accent);
  animation: blink 1.1s steps(2, jump-none) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.site-nav {
  display: flex;
  gap: 28px;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
  position: relative;
  transition: color 0.2s var(--ease);
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -22px;
  height: 1px;
  background: var(--accent);
}

/* ============================================
   main
   ============================================ */
.site-main {
  padding: 96px 0 120px;
  min-height: calc(100vh - 64px - 80px);
}

/* ============================================
   hero
   ============================================ */
.hero {
  margin-bottom: 120px;
  animation: fade-up 0.8s var(--ease) both;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.04em;
  margin-bottom: 24px;
  text-transform: lowercase;
}

.hero-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(48px, 8vw, 88px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 28px;
}

.hero-accent {
  font-style: italic;
  color: var(--text-dim);
}

.hero-lede {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}

.btn-primary {
  background: var(--accent);
  color: #000;
}

.btn-primary:hover {
  background: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-ghost {
  border-color: var(--border-strong);
  color: var(--text-dim);
}

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

@keyframes fade-up {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   sections
   ============================================ */
.section {
  margin-bottom: 80px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: lowercase;
  letter-spacing: 0.02em;
}

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

.section-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  transition: color 0.2s var(--ease);
}

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

/* ============================================
   post cards
   ============================================ */
.post-list {
  display: flex;
  flex-direction: column;
}

.post-card {
  display: block;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  transition: all 0.2s var(--ease);
  position: relative;
}

.post-card:hover {
  padding-left: 12px;
}

.post-card::before {
  content: "→";
  position: absolute;
  left: -20px;
  top: 28px;
  color: var(--accent);
  opacity: 0;
  transition: all 0.2s var(--ease);
}

.post-card:hover::before {
  opacity: 1;
  left: -8px;
}

.post-meta {
  display: flex;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  margin-bottom: 8px;
}

.post-tags { color: var(--text-faint); }

.post-title {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 8px;
  color: var(--text);
}

.post-summary {
  color: var(--text-dim);
  font-size: 15px;
  max-width: 640px;
}

.empty-state {
  padding: 40px 24px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  text-align: center;
}

.empty-state code {
  display: block;
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 13px;
  margin-bottom: 8px;
}

.empty-state p {
  color: var(--text-faint);
  font-size: 14px;
}

/* ============================================
   page head (list / about)
   ============================================ */
.page-head {
  margin-bottom: 64px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.page-head-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  margin-bottom: 16px;
}

.page-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.page-lede {
  color: var(--text-dim);
  font-size: 17px;
  max-width: 600px;
}

/* ============================================
   flag capture code block
   ============================================ */
.article-body pre.flag-capture {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(0, 255, 156, 0.04), var(--bg-elev));
  position: relative;
  padding-top: 32px;
}

.article-body pre.flag-capture::before {
  content: "// flag captured";
  position: absolute;
  top: 8px;
  left: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.04em;
}

/* ============================================
   article
   ============================================ */
.article-head {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.article-meta {
  display: flex;
  gap: 16px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.tag {
  color: var(--accent);
  margin-right: 6px;
}

.article-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.article-lede {
  font-size: 19px;
  color: var(--text-dim);
  font-family: var(--font-serif);
  font-style: italic;
  line-height: 1.5;
}

.article-body {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

.article-body > * + * { margin-top: 1.2em; }

.article-body h2 {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 400;
  margin-top: 2.4em;
  letter-spacing: -0.01em;
  color: var(--accent);
}

.article-body h3 {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-top: 2em;
}

.article-body p { color: var(--text); }

.article-body a {
  color: var(--accent);
  border-bottom: 1px solid var(--border-strong);
  transition: border-color 0.2s var(--ease);
}

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

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent);
}

.article-body pre {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
}

.article-body pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: var(--text);
}

.article-body blockquote {
  border-left: 2px solid var(--accent);
  padding-left: 20px;
  font-style: italic;
  color: var(--text-dim);
}

.article-body ul, .article-body ol {
  padding-left: 24px;
}

.article-body li { margin-bottom: 0.4em; }

.article-body img {
  max-width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 3em 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.article-body th, .article-body td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.article-body th {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

.article-foot {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.back-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
  transition: color 0.2s var(--ease);
}

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


.article-body a.email-link {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.95em;
  padding: 0 2px;
  transition: all 0.2s var(--ease);
}

.article-body a.email-link:hover {
  border-bottom: 1px dashed var(--border-strong);
  border-bottom-color: var(--accent);
  background: var(--accent-glow);
}

.article-body em {
  color: var(--accent);
  font-style: italic;
}

.article-body a.terminal-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text);
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 10px 16px;
  margin: 8px 0;
  border-bottom: 1px solid var(--border-strong);
  transition: all 0.2s var(--ease);
}

.article-body a.terminal-link:hover {
  border-color: var(--accent);
  background: var(--bg-card);
  transform: translateY(-1px);
}

.article-body a.terminal-link .terminal-prompt {
  color: var(--accent);
  margin-right: 8px;
}

.article-body a.terminal-link::after {
  content: "_";
  color: var(--accent);
  margin-left: 4px;
  animation: blink 1.1s steps(2, jump-none) infinite;
}
/* ============================================
   achievements page
   ============================================ */
.achievement-grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.achievement {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 20px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  transition: all 0.2s var(--ease);
  position: relative;
  text-decoration: none;
  color: inherit;
}

.achievement:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

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

.achievement-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  padding-top: 4px;
}

.achievement-title {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}

.achievement-desc {
  color: var(--text-dim);
  font-size: 14px;
}

a.achievement {
  grid-template-columns: 140px 1fr auto;
}

.achievement-credential {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  padding-top: 4px;
  white-space: nowrap;
}

@media (max-width: 600px) {
  .achievement {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  a.achievement {
    grid-template-columns: 1fr auto;
  }
}

/* ============================================
   footer
   ============================================ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-prompt { color: var(--accent); }

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  transition: color 0.2s var(--ease);
}

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

/* ============================================
   responsive
   ============================================ */
@media (max-width: 640px) {
  .site-header .container { height: 56px; }
  .site-nav { gap: 16px; }
  .nav-link { font-size: 12px; }
  .site-main { padding: 56px 0 80px; }
  .hero { margin-bottom: 80px; }
  .section { margin-bottom: 56px; }
}