:root {
  --bg: #0b0e13;
  --bg-elev-1: #11151c;
  --bg-elev-2: #161b24;
  --bg-elev-3: #1c2230;
  --border: #232a37;
  --border-strong: #2f384a;
  --fg: #d6dde9;
  --fg-muted: #8a93a4;
  --fg-dim: #5b6478;
  --accent: #6dbf8b;
  --accent-soft: rgba(109, 191, 139, 0.14);
  --accent-line: rgba(109, 191, 139, 0.42);
  --amber: #d99c4a;
  --amber-soft: rgba(217, 156, 74, 0.14);
  --red: #d8615a;
  --red-soft: rgba(216, 97, 90, 0.14);
  --user: #7ba7d7;
  --user-soft: rgba(123, 167, 215, 0.12);
  --code-bg: #0d1117;
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.02), 0 8px 24px rgba(0, 0, 0, 0.4);

  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', ui-monospace, Menlo, Consolas, monospace;
  --radius: 8px;
  --radius-lg: 12px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: radial-gradient(1200px 600px at 80% -10%, rgba(109, 191, 139, 0.05), transparent 60%),
                    radial-gradient(900px 500px at -10% 110%, rgba(123, 167, 215, 0.04), transparent 60%);
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 120ms ease;
}
a:hover {
  border-bottom-color: var(--accent-line);
}

code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--fg);
}

/* ---- Banner ---- */
.banner {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background-color: rgba(11, 14, 19, 0.85);
}
.banner-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-soft), transparent);
  border: 1px solid var(--accent-line);
  color: var(--accent);
  font-size: 22px;
  font-family: var(--font-mono);
}
.brand h1 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-family: var(--font-mono);
}
.subtitle {
  margin: 0;
  font-size: 13px;
  color: var(--fg-muted);
}
.nav-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--fg-muted);
  border-bottom: 1px solid transparent;
}
.nav-links a:hover {
  color: var(--fg);
}

/* ---- Layout: two-column main ---- */
.layout {
  flex: 1;
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 20px;
}
.pane {
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow);
  /* Bounded height so the conversation / log content scrolls inside the pane,
     not the page — keeps the two columns balanced no matter how chatty the run. */
  height: clamp(540px, calc(100vh - 220px), 720px);
}
.pane-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
  font-size: 13px;
}
.pane-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--fg-dim);
  flex-shrink: 0;
  box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.5) inset;
}
.pane-dot-claude { background: var(--user); }
.pane-dot-server { background: var(--accent); }
.pane-title { font-weight: 600; color: var(--fg); }
.pane-meta { color: var(--fg-dim); font-family: var(--font-mono); font-size: 11px; margin-left: auto; }

/* ---- Conversation pane ---- */
.conversation {
  flex: 1;
  padding: 18px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
.conversation::-webkit-scrollbar { width: 8px; }
.conversation::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }
.placeholder {
  border-left: 2px solid var(--accent-line);
  padding: 12px 16px;
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
}
.placeholder-headline {
  margin: 0 0 6px;
  font-weight: 500;
  color: var(--fg);
}
.placeholder-sub {
  margin: 0;
  font-size: 13px;
  color: var(--fg-muted);
}

/* Conversation message bubbles */
.msg {
  display: flex;
  gap: 12px;
  margin-bottom: 18px;
  animation: msg-in 240ms ease-out;
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.msg-avatar {
  width: 28px; height: 28px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}
.msg-user .msg-avatar  { background: var(--user-soft); color: var(--user); border: 1px solid var(--user); }
.msg-claude .msg-avatar{ background: var(--accent-soft); color: var(--accent); border: 1px solid var(--accent-line); }
.msg-body { flex: 1; min-width: 0; }
.msg-role {
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 4px;
  font-weight: 600;
}
.msg-content {
  font-size: 14.5px;
  color: var(--fg);
  white-space: pre-wrap;
  word-wrap: break-word;
}
.msg-content em { color: var(--fg-muted); font-style: normal; }
.msg-content .approve {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  background: var(--amber-soft);
  color: var(--amber);
  border: 1px solid rgba(217, 156, 74, 0.4);
  font-family: var(--font-mono);
  font-size: 12px;
}
.cursor-blink::after {
  content: '▍';
  display: inline-block;
  margin-left: 2px;
  color: var(--accent);
  animation: blink 1s steps(1, end) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---- Tool call card ---- */
.tool-card {
  margin: 14px 0 18px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(109, 191, 139, 0.05), transparent 70%) var(--bg-elev-2);
  overflow: hidden;
  animation: card-in 320ms ease-out;
  position: relative;
}
@keyframes card-in {
  from { opacity: 0; transform: translateY(6px) scale(0.992); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-line), transparent);
}
.tool-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.015);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12.5px;
}
.tool-tag {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent-line);
  padding: 1px 7px;
  border-radius: 4px;
  font-size: 10.5px;
  letter-spacing: 0.04em;
  font-weight: 600;
  text-transform: uppercase;
}
.tool-name { color: var(--fg); font-weight: 600; }
.tool-source-link {
  margin-left: auto;
  font-size: 11px;
  color: var(--fg-dim);
  border-bottom: 1px solid transparent;
}
.tool-source-link:hover { color: var(--accent); border-bottom-color: var(--accent-line); }
.tool-card-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
}
.tool-pane {
  background: var(--bg-elev-1);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg);
  overflow-x: auto;
  scrollbar-width: thin;
  max-height: 220px;
  overflow-y: auto;
}
.tool-pane-label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--fg-dim);
  text-transform: uppercase;
  margin-bottom: 6px;
  font-family: var(--font-sans);
  font-weight: 600;
}
.tool-pane pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}
.json-key   { color: #aac4f0; }
.json-string{ color: var(--accent); }
.json-num   { color: var(--amber); }
.json-bool  { color: var(--user); font-weight: 500; }
.json-null  { color: var(--fg-dim); }
.json-punc  { color: var(--fg-muted); }

/* ---- Server log pane ---- */
.server-log {
  flex: 1;
  margin: 0;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--fg);
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.18), transparent);
}
.server-log::-webkit-scrollbar { width: 8px; }
.server-log::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }
.log-line { display: block; padding: 1px 0; animation: line-in 240ms ease-out; }
@keyframes line-in {
  from { opacity: 0; transform: translateX(-3px); }
  to   { opacity: 1; transform: translateX(0); }
}
.log-line .log-time { color: var(--fg-dim); }
.log-line .log-tag-info  { color: var(--accent); }
.log-line .log-tag-tool  { color: var(--amber); font-weight: 600; }
.log-line .log-tool-name { color: var(--user); }
.log-line .log-arrow     { color: var(--fg-dim); margin: 0 4px; }
.log-line .log-result    { color: var(--fg); }

/* ---- Scenarios ---- */
.scenarios {
  border-top: 1px solid var(--border);
  background: var(--bg-elev-1);
  padding: 28px 24px 32px;
}
.scenarios-inner {
  max-width: 1280px;
  margin: 0 auto;
}
.scenarios-header {
  margin-bottom: 18px;
}
.scenarios-eyebrow {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 6px;
}
.scenarios-header h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--fg);
}
.scenario-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}
.scenario-btn {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--bg-elev-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: 14px;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
  width: 100%;
}
.scenario-btn:hover {
  border-color: var(--accent-line);
  background: linear-gradient(180deg, rgba(109, 191, 139, 0.06), transparent), var(--bg-elev-2);
  transform: translateY(-1px);
}
.scenario-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.scenario-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.scenario-icon {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent-line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  flex-shrink: 0;
  margin-top: 2px;
}
.scenario-body { display: flex; flex-direction: column; gap: 4px; flex: 1; min-width: 0; }
.scenario-title { font-weight: 600; color: var(--fg); }
.scenario-tools {
  font-size: 12px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  word-break: break-word;
}
.scenario-tools code {
  font-size: 11px;
  padding: 0 4px;
  background: rgba(255, 255, 255, 0.03);
}
.scenario-blurb { font-size: 13px; color: var(--fg-muted); }

.scenario-controls {
  margin-top: 14px;
  display: flex;
  gap: 10px;
}
.control-btn {
  background: transparent;
  color: var(--fg-muted);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  transition: border-color 160ms ease, color 160ms ease;
}
.control-btn:hover { border-color: var(--accent-line); color: var(--fg); }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 22px 24px 32px;
  background: var(--bg);
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}
.footer-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
}
.footer-stats .dot { color: var(--fg-dim); }
.footer-disclaimer {
  margin: 0;
  font-size: 12.5px;
  color: var(--fg-dim);
  max-width: 760px;
}
.footer-author {
  margin: 0;
  font-size: 12.5px;
  color: var(--fg-dim);
}

/* ---- Responsive ---- */
@media (max-width: 920px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .pane { height: 460px; }
  .tool-card-body { grid-template-columns: 1fr; }
  .scenarios-header h2 { font-size: 19px; }
}
@media (max-width: 540px) {
  .banner-inner { padding: 12px 16px; }
  .nav-links { gap: 12px; }
  .nav-links a span { display: none; }
  .layout { padding: 16px; gap: 14px; }
  .scenarios { padding: 22px 16px; }
  .conversation, .server-log { padding: 12px; font-size: 13px; }
  .footer-inner { padding: 0 8px; }
}

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