:root {
  --bg:       #080b10;
  --bg-2:     #0d1117;
  --bg-3:     #131920;
  --bg-4:     #1a2230;
  --border:   #1e2a38;
  --border-2: #263545;
  --text:     #e2eaf4;
  --text-2:   #7a95b0;
  --text-3:   #3d5570;
  --accent:   #00c2ff;
  --accent-dim: rgba(0,194,255,0.12);
  --accent-glow: rgba(0,194,255,0.25);
  --green:    #00e5a0;
  --green-dim: rgba(0,229,160,0.12);
  --orange:   #ff9f40;
  --orange-dim: rgba(255,159,64,0.15);
  --red:      #ff4d6a;
  --purple:   #a78bfa;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,194,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,194,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

.mono { font-family: 'DM Mono', monospace; }
.serif { font-family: 'DM Serif Display', serif; }

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 1;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--accent-dim);
  border: 1px solid rgba(0,194,255,0.2);
  border-radius: 100px;
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.tag .dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.4} }


/* ================================================================
   TOPBAR
================================================================ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 52px;
  background: rgba(8,11,16,0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 32px;
  gap: 10px;
}
.topbar-logo {
  font-family: 'DM Mono', monospace;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.topbar-logo .accent { color: var(--accent); }
.topbar-sub {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.topbar-cta {
  margin-left: auto;
  padding: 6px 16px;
  border: 1px solid rgba(0,194,255,0.3);
  background: rgba(0,194,255,0.07);
  color: var(--accent);
  border-radius: 6px;
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.12s, border-color 0.12s;
  white-space: nowrap;
}
.topbar-cta:hover {
  background: rgba(0,194,255,0.14);
  border-color: rgba(0,194,255,0.6);
}
.topbar-link {
  font-size: 13px;
  color: var(--text-2);
  text-decoration: none;
  transition: color 0.2s;
}
.topbar-link:hover { color: var(--text); }


/* ================================================================
   HERO
================================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 32px 80px;
  position: relative;
  z-index: 1;
}
.hero-glow {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(ellipse at center,
    rgba(0,194,255,0.12) 0%,
    rgba(0,229,160,0.06) 40%,
    transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}
.hero .tag { margin-bottom: 32px; }
.hero h1 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(36px, 8vw, 56px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  max-width: 800px;
}
.hero .sub {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-2);
  max-width: 600px;
  line-height: 1.65;
  margin-bottom: 40px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 20px;
}

.install-block {
  display: flex;
  align-items: center;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: 8px;
  overflow: hidden;
}
.install-block .prompt {
  padding: 12px 16px;
  font-family: 'DM Mono', monospace;
  font-size: 14px;
  color: var(--text-3);
  border-right: 1px solid var(--border);
  user-select: none;
}
.install-block .cmd {
  padding: 12px 16px;
  font-family: 'DM Mono', monospace;
  font-size: 14px;
  color: var(--text);
}
.install-block .copy-btn {
  padding: 12px 16px;
  background: var(--bg-4);
  border: none;
  border-left: 1px solid var(--border);
  color: var(--text-2);
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
}
.install-block .copy-btn:hover {
  background: var(--accent-dim);
  color: var(--accent);
}

.btn-primary {
  padding: 12px 24px;
  background: var(--accent);
  color: #080b10;
  border: none;
  border-radius: 8px;
  font-family: 'DM Mono', monospace;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn-primary:hover {
  background: #33cfff;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0,194,255,0.3);
}
.btn-ghost {
  padding: 12px 20px;
  background: transparent;
  border: 1px solid var(--border-2);
  border-radius: 8px;
  color: var(--text-2);
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'DM Mono', monospace;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.hero-footnote {
  font-size: 13px;
  color: var(--text-3);
  font-family: 'DM Mono', monospace;
  letter-spacing: 0.02em;
}


/* ================================================================
   PROBLEM SECTION
================================================================ */
.section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}
.section-tag { text-align: center; margin-bottom: 20px; }
.section-title {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 400;
  text-align: center;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.section-sub {
  text-align: center;
  color: var(--text-2);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto 60px;
  line-height: 1.6;
}

.problem-split {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  gap: 0;
  align-items: start;
}
.problem-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}
.problem-card.bad { border-color: rgba(255,77,106,0.2); }
.problem-card.good { border-color: rgba(0,229,160,0.2); }

.problem-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.problem-card.bad .problem-card-head { color: var(--red); }
.problem-card.good .problem-card-head { color: var(--green); }

.problem-log {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  line-height: 1.8;
  color: var(--text-3);
}
.problem-log .hi { color: var(--text-2); }
.problem-log .err { color: var(--red); }
.problem-log .ok { color: var(--green); }
.problem-log .warn { color: var(--orange); }

.vs {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--text-3);
  font-weight: 700;
  letter-spacing: 0.2em;
  padding-top: 60px;
}

.finding-card {
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-2);
  margin-bottom: 8px;
}
.finding-card.warn {
  background: var(--bg);
  border-color: var(--border);
}
.finding-card.success {
  background: var(--green-dim);
  border-color: rgba(0,229,160,0.2);
}
.finding-label {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  display: block;
  margin-bottom: 4px;
}
.finding-label.warn { color: var(--orange); }
.finding-label.ok { color: var(--green); }

.section-caption {
  text-align: center;
  margin-top: 40px;
  font-family: 'DM Serif Display', serif;
  font-size: 20px;
  font-style: italic;
  color: var(--text-2);
}


/* ================================================================
   REAL TRACES
================================================================ */
.trace-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 700px;
  margin: 0 auto;
}
.trace-card {
  display: block;
  padding: 24px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
}
.trace-card:hover {
  border-color: var(--accent);
  background: var(--bg-3);
}
.trace-card-kind {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--purple);
  margin-bottom: 8px;
}
.trace-card-name {
  font-family: 'DM Mono', monospace;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}
.trace-card-desc {
  font-size: 13px;
  color: var(--text-2);
}


/* ================================================================
   DEMO SECTION
================================================================ */
.demo-section { padding-top: 0; }

.demo-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 16px;
  align-items: start;
}

.waterfall-pane {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.ruler {
  display: flex;
  justify-content: space-between;
  padding: 5px 12px 5px calc(168px + 12px);
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  color: var(--text-2);
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
  letter-spacing: 0.02em;
}
.span-row {
  display: flex;
  align-items: center;
  height: 38px;
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}
.span-row:last-child { border-bottom: none; }
.span-row:hover { background: rgba(255,255,255,0.02); }
.span-label {
  width: 168px;
  flex-shrink: 0;
  padding: 0 12px;
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-right: 1px solid var(--border);
  height: 100%;
  display: flex;
  align-items: center;
}
.span-track {
  flex: 1;
  position: relative;
  height: 100%;
}
.span-bar {
  position: absolute;
  top: 8px;
  height: calc(100% - 16px);
  border-radius: 3px;
  cursor: pointer;
  transition: filter 0.12s, transform 0.1s, outline 0.1s;
  min-width: 4px;
}
.span-bar:hover { filter: brightness(1.25); transform: scaleY(1.1); }
.span-bar.active {
  filter: brightness(1.3);
  outline: 2px solid rgba(255,255,255,0.25);
  outline-offset: 2px;
}

.kind-llm    { background: var(--accent); box-shadow: 0 0 10px rgba(0,194,255,0.35); }
.kind-tool   { background: var(--orange); box-shadow: 0 0 10px rgba(255,159,64,0.35); }
.kind-custom { background: var(--green);  box-shadow: 0 0 10px rgba(0,229,160,0.35); }
.kind-agent  { background: var(--purple); box-shadow: 0 0 10px rgba(167,139,250,0.35); }
.kind-error  { background: var(--red);    box-shadow: 0 0 10px rgba(255,77,106,0.35); }

.detail-pane {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  min-height: 180px;
  position: sticky;
  top: 68px;
}
.detail-hint { color: var(--text-2); font-size: 12px; }
.detail-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 14px;
  font-weight: 500;
}
.kind-dot { font-size: 9px; }
.detail-grid {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 5px 10px;
  font-size: 12px;
  margin-bottom: 12px;
}
.detail-grid dt {
  color: var(--text-2);
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  align-self: start;
  padding-top: 1px;
}
.detail-grid dd {
  font-family: 'DM Mono', monospace;
  overflow-wrap: break-word;
  font-size: 12px;
}
.detail-section { margin-top: 10px; }
.detail-section-label {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-2);
  margin-bottom: 5px;
}
.detail-json {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px 12px;
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--text);
  white-space: pre-wrap;
  overflow-wrap: break-word;
  max-height: 200px;
  overflow-y: auto;
  line-height: 1.6;
}
.detail-json::-webkit-scrollbar { width: 4px; }
.detail-json::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 2px; }
.redacted { color: var(--orange); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.badge-ok      { background: rgba(0,229,160,0.12);  color: var(--green);  border: 1px solid rgba(0,229,160,0.25); }
.badge-error   { background: rgba(255,77,106,0.12); color: var(--red);    border: 1px solid rgba(255,77,106,0.25); }
.badge-running { background: rgba(0,194,255,0.12);  color: var(--accent); border: 1px solid rgba(0,194,255,0.25); }

.run-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}
.run-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.run-name {
  font-family: 'DM Mono', monospace;
  font-size: 20px;
  font-weight: 500;
}
.run-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 4px;
}
.run-meta .sep { margin: 0 8px; color: var(--text-3); }


/* ================================================================
   HOW IT WORKS
================================================================ */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
.step {
  background: var(--bg-2);
  padding: 36px 32px;
  position: relative;
}
.step-num {
  font-family: 'DM Serif Display', serif;
  font-size: 72px;
  font-weight: 400;
  color: var(--bg-4);
  line-height: 1;
  margin-bottom: 16px;
  font-style: italic;
}
.step-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.step-desc {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 16px;
}
.step-code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  line-height: 1.8;
}
.step-code .kw { color: #c084fc; }
.step-code .fn { color: var(--accent); }
.step-code .dec { color: var(--orange); }
.step-code .com { color: var(--text-3); }


/* ================================================================
   COMPARISON TABLE
================================================================ */
.compare-wrap {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
}
.compare-table th {
  padding: 16px 20px;
  background: var(--bg-3);
  text-align: left;
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
}
.compare-table th:last-child { border-right: none; }
.compare-table td {
  padding: 14px 20px;
  font-size: 13px;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  vertical-align: top;
}
.compare-table td:last-child { border-right: none; }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr.highlight td { background: rgba(0,194,255,0.04); }
.compare-table strong { color: var(--text); font-weight: 600; }
.pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 11px;
  font-family: 'DM Mono', monospace;
}
.pill.gp { background: rgba(0,194,255,0.15); color: var(--accent); }
.pill.other { background: rgba(255,255,255,0.06); color: var(--text-3); }

.compare-note {
  margin-top: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.compare-note-block {
  padding: 20px 24px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
}
.compare-note-block h4 {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.compare-note-block.gp-note h4 { color: var(--accent); }
.compare-note-block.other-note h4 { color: var(--text-3); }

.compare-closing {
  text-align: center;
  margin-top: 24px;
  font-size: 13px;
  color: var(--text-3);
  font-family: 'DM Mono', monospace;
}


/* ================================================================
   GET STARTED
================================================================ */
.get-started-section {
  padding: 100px 0;
  text-align: center;
  position: relative;
  z-index: 1;
}
.get-started-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse,
    rgba(0,194,255,0.08) 0%,
    rgba(0,229,160,0.04) 40%,
    transparent 70%);
  filter: blur(50px);
  pointer-events: none;
}
.get-started-section h2 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(40px, 6vw, 56px);
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.get-started-section h2 em { font-style: italic; color: var(--accent); }

.quickstart-block {
  text-align: left;
  max-width: 520px;
  margin: 40px auto 0;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.quickstart-header {
  padding: 12px 18px;
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.quickstart-body {
  padding: 18px;
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  line-height: 1.8;
}
.quickstart-body .kw { color: #c084fc; }
.quickstart-body .fn { color: var(--accent); }
.quickstart-body .dec { color: var(--orange); }
.quickstart-body .str { color: var(--green); }
.quickstart-body .com { color: var(--text-3); }

.get-started-footnote {
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-3);
  font-family: 'DM Mono', monospace;
}


/* ================================================================
   FOOTER
================================================================ */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  position: relative;
  z-index: 1;
}
.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-logo {
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  color: var(--text-3);
}
.footer-logo span { color: var(--accent); }
.footer-links { display: flex; gap: 24px; }
.footer-links a {
  font-size: 13px;
  color: var(--text-3);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--text-2); }
.footer-by { font-size: 12px; color: var(--text-3); }
.footer-by a { color: var(--text-2); text-decoration: none; }
.footer-by a:hover { color: var(--accent); }


/* ================================================================
   ANIMATIONS
================================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.7s ease forwards; }
.delay-1 { animation-delay: 0.1s; opacity: 0; }
.delay-2 { animation-delay: 0.2s; opacity: 0; }
.delay-3 { animation-delay: 0.3s; opacity: 0; }
.delay-4 { animation-delay: 0.5s; opacity: 0; }
.delay-5 { animation-delay: 0.7s; opacity: 0; }


/* ================================================================
   MOBILE
================================================================ */
@media (max-width: 768px) {
  .problem-split { grid-template-columns: 1fr; }
  .vs { padding: 8px 0; }
  .steps { grid-template-columns: 1fr; }
  .compare-table th,
  .compare-table td { padding: 10px 12px; font-size: 12px; }
  .compare-note { grid-template-columns: 1fr; }
  .demo-layout { grid-template-columns: 1fr; }
  .detail-pane { position: static; }
  .trace-cards { grid-template-columns: 1fr; }
  .hero { padding: 100px 20px 60px; }
  .container { padding: 0 20px; }
  .topbar { padding: 0 16px; }
  .topbar-link { display: none; }
}