:root {
  --paper: #F6F7F5;
  --ink: #14181C;
  --ink-soft: #4A5158;
  --ink-faint: #8B9198;
  --line: #DCDFDB;
  --line-strong: #C3C8C3;
  --signal: #1D1D1D;
  --code-string: #1D1D1D;
  --code-comment: #9AA0A6;
  --surface: #FFFFFF;
  --glass-bg: rgba(255,255,255,0.22);
  --glass-border: rgba(255,255,255,0.85);
  --glass-shadow: 0 16px 46px rgba(20,24,28,0.14), inset 0 1px 0 rgba(255,255,255,0.95);
  --glass-sheen-color: rgba(255,255,255,0.7);
  --glass-gradient: linear-gradient(165deg, rgba(255,255,255,0.55) 0%, rgba(255,255,255,0.1) 30%, transparent 55%);
}

[data-theme="dark"] {
  --paper: #101316;
  --ink: #F3F1EA;
  --ink-soft: #C9CDD1;
  --ink-faint: #7D848B;
  --line: #2A2E33;
  --line-strong: #3C4046;
  --signal: #F3F1EA;
  --code-string: #F3F1EA;
  --code-comment: #7D848B;
  --surface: #1B1F23;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.14);
  --glass-shadow: 0 16px 46px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.08);
  --glass-sheen-color: rgba(255,255,255,0.18);
  --glass-gradient: linear-gradient(165deg, rgba(255,255,255,0.10) 0%, rgba(255,255,255,0.02) 30%, transparent 55%);
}

html { transition: background 0.3s ease; }
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Sora', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

.mono { font-family: 'JetBrains Mono', monospace; }

/* ---------- NAV ---------- */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 106;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 48px;
  border-bottom: 1px solid rgba(255,255,255,0.5);
  background: rgba(245, 241, 234, 0.4);
  backdrop-filter: blur(34px) saturate(200%);
  -webkit-backdrop-filter: blur(34px) saturate(200%);
  box-shadow: 0 1px 0 rgba(255,255,255,0.6) inset, 0 8px 24px rgba(20,24,28,0.06);
  transition: background 0.3s ease, border-color 0.3s ease;
}
[data-theme="dark"] nav {
  border-bottom: 1px solid rgba(255,255,255,0.08);
  background: rgba(16,19,22,0.55);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06) inset, 0 8px 24px rgba(0,0,0,0.35);
}
.logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink);
  line-height: 1;
}
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  font-weight: 400;
  color: var(--ink);
  text-decoration: none;
  transition: color 0.2s ease;
}
.nav-links a .bracket { color: var(--ink); }
.nav-links a:hover { color: var(--signal); }
.nav-links a:hover .bracket { color: var(--signal); }
.nav-links a.current { color: var(--ink); }
.nav-links a.current .bracket { color: var(--signal); }

/* ---------- SECTION SCAFFOLD ---------- */
main { padding-top: 80px; }
section {
  padding: 90px 48px;
  max-width: 980px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
}
section.no-border { border-top: none; }
.section-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--signal);
  margin-bottom: 14px;
}
.section-tag .comment { color: var(--code-comment); }
h1, h2, h3 { font-weight: 500; letter-spacing: -0.01em; }
h2 { font-size: clamp(28px, 4vw, 40px); margin-bottom: 40px; max-width: 620px; }
p.lead { font-size: 17px; color: var(--ink-soft); max-width: 480px; }

/* ---------- BUTTONS ---------- */
.btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  padding: 13px 22px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}
.btn:hover { border-color: var(--signal); color: var(--signal); }
.btn.primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn.primary:hover { background: var(--signal); border-color: var(--signal); color: var(--paper); }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- WORK LIST ---------- */
.work-grid { display: flex; flex-direction: column; }
.work-item {
  display: grid;
  grid-template-columns: 60px 1fr 200px;
  align-items: baseline;
  gap: 24px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
  transition: background 0.2s ease;
}
.work-item:hover { background: var(--surface); }
.work-item:last-child { border-bottom: 1px solid var(--line); }
.work-num { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--ink-faint); }
.work-name { font-size: 20px; font-weight: 500; }
.work-meta { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--ink-soft); text-align: right; }

/* ---------- SERVICE OBJECT ---------- */
.service-object {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 36px 40px;
  line-height: 2;
}
.service-object .key { color: var(--ink-faint); }
.service-object .val { color: var(--ink); }
.service-object .str { color: var(--code-string); }

footer {
  padding: 32px 48px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}
footer a { color: var(--ink-faint); text-decoration: none; transition: color 0.2s ease; }
footer a:hover { color: var(--signal); }
.footer-right { display: flex; align-items: center; gap: 20px; }
.back-to-top {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper) !important;
  border-radius: 0;
  padding: 6px 14px;
  line-height: 1;
  transition: opacity 0.2s ease;
}
.back-to-top:hover { opacity: 0.72; color: var(--paper) !important; }

/* ---------- MOBILE NAV ---------- */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 110;
  position: relative;
}
.nav-burger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.3s cubic-bezier(0.23,1,0.32,1), opacity 0.2s ease;
}
.nav-burger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(20,24,28,0.4);
  z-index: 104;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.nav-overlay.open { display: block; opacity: 1; }
[data-theme="dark"] .nav-overlay { background: rgba(0,0,0,0.6); }

@media (max-width: 780px) {
  .nav-burger { display: flex; }
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(280px, 80vw);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 28px;
    padding: 40px;
    background: var(--paper);
    box-shadow: -8px 0 40px rgba(20,24,28,0.15);
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.23,1,0.32,1);
    z-index: 105;
  }
  .nav-links.open { transform: translateX(0); }
  [data-theme="dark"] .nav-links { box-shadow: -8px 0 40px rgba(0,0,0,0.4); }
}
@media (max-width: 780px) and (prefers-reduced-motion: reduce) {
  .nav-links {
    transition: opacity 0.2s ease;
    transform: none;
    opacity: 0;
    pointer-events: none;
  }
  .nav-links.open { opacity: 1; pointer-events: auto; }
  .nav-burger span { transition: opacity 0.2s ease; }
  .nav-burger.open span:nth-child(1), .nav-burger.open span:nth-child(3) { transform: none; opacity: 0.4; }
}

@media (max-width: 640px) {
  nav { padding: 18px 20px; }
  .nav-links { gap: 16px; }
  section { padding: 60px 20px; }
  .work-item { grid-template-columns: 36px 1fr; }
  .work-meta { display: none; }
  footer { padding: 24px 20px; flex-direction: column; gap: 6px; }
  .footer-right { gap: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .bg-blob { animation: none !important; }
}