/* ---------- Grok-style design system ---------- */

:root {
  --bg: #000000;
  --bg-card: #0a0a0a;
  --border: #1d1d1d;
  --border-strong: #2a2a2a;
  --fg: #ffffff;
  --fg-muted: #8a8a8a;
  --fg-faint: #555555;
  --accent: #ff6a3d;
  --accent-bg: rgba(255, 106, 61, 0.08);
  --user: #ffffff;
  --radius-pill: 999px;
  --radius-card: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
}

a {
  color: var(--fg);
  text-decoration: none;
}

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

code,
.mono {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.92em;
}

code.accent {
  color: var(--accent);
  background: var(--accent-bg);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
}

/* ---------- top bar ---------- */

.topbar {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 22px 40px 18px;
  position: sticky;
  top: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.topbar-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  width: 100%;
}

.topbar-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.brand {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  color: var(--fg);
  text-decoration: none;
  line-height: 0;
}

.brand:hover {
  color: var(--fg);
}

.brand-logo {
  display: block;
  width: 350px;
  height: auto;
  max-width: 100%;
  object-fit: contain;
}

.brand-mark,
.brand-name {
  display: none;
}

.topnav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 28px;
}

.topnav a {
  color: var(--fg-muted);
  font-size: 12px;
  letter-spacing: 0.12em;
  font-weight: 500;
  padding: 4px 0;
}

.topnav a.active,
.topnav a:hover {
  color: var(--fg);
}

/* ---------- buttons ---------- */

.cta-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 22px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  font-size: 12px;
  letter-spacing: 0.12em;
  font-weight: 500;
  color: var(--fg);
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.cta-pill:hover {
  border-color: var(--fg);
}

.cta-pill.primary {
  border-color: var(--fg);
  font-size: 13px;
  padding: 12px 24px;
}

.cta-pill.primary:hover {
  background: var(--fg);
  color: var(--bg);
}

.cta-pill.recording {
  border-color: var(--accent);
  color: var(--accent);
}

.cta-pill.recording:hover {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.cta-pill .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--fg-faint);
  transition: background 0.2s;
}

.cta-pill.recording .dot {
  background: var(--accent);
  animation: pulse 1.4s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.4;
    transform: scale(0.85);
  }
}

/* ---------- hero ---------- */

.app-main {
  max-width: 920px;
  margin: 0 auto;
  padding: 70px 40px 100px;
}

.hero {
  margin-bottom: 60px;
}

.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--fg-muted);
  margin: 0 0 24px;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin: 0 0 22px;
}

.hero .lede {
  font-size: 17px;
  color: var(--fg-muted);
  max-width: 640px;
  line-height: 1.55;
  margin: 0 0 36px;
}

.actions {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.status {
  color: var(--fg-muted);
  font-size: 13px;
  font-family: 'JetBrains Mono', monospace;
}

.muted {
  color: var(--fg-muted);
}

.small {
  font-size: 12px;
}

/* ---------- transcript ---------- */

.transcript {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-top: 1px solid var(--border);
  padding-top: 32px;
}

.row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.row .role {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--fg-muted);
  padding-top: 2px;
}

.row .text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--fg);
  white-space: pre-wrap;
  word-wrap: break-word;
}

.row.user .role {
  color: var(--fg);
}

.row.assistant .role {
  color: var(--accent);
}

.row.tool {
  background: rgba(255, 106, 61, 0.04);
  border-left: 2px solid var(--accent);
  padding-left: 14px;
  margin-left: -16px;
}

.row.tool .role {
  color: var(--accent);
  font-weight: 500;
}

.row.tool .text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--fg-muted);
}

.row.system .role {
  color: var(--fg-faint);
}

.row.system .text {
  color: var(--fg-muted);
  font-size: 13px;
  font-style: italic;
}

/* ---------- guide page ---------- */

.page-guide .container {
  max-width: 760px;
  margin: 0 auto;
  padding: 60px 40px 100px;
}

.page-guide h1 {
  font-size: 48px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

.page-guide h2 {
  font-size: 22px;
  font-weight: 600;
  margin: 56px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.page-guide h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  margin: 32px 0 10px;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.02em;
}

.page-guide p,
.page-guide li {
  font-size: 15px;
  line-height: 1.65;
  color: var(--fg-muted);
}

.page-guide p strong,
.page-guide li strong {
  color: var(--fg);
  font-weight: 500;
}

.page-guide ul,
.page-guide ol {
  padding-left: 22px;
}

.page-guide ul li,
.page-guide ol li {
  margin-bottom: 6px;
}

.page-guide pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.55;
  color: var(--fg);
  margin: 16px 0;
}

.page-guide code {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.88em;
  color: var(--accent);
}

.page-guide pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
}

.page-guide a {
  color: var(--accent);
}

.page-guide a:hover {
  color: var(--fg);
}

.callout {
  background: var(--accent-bg);
  border: 1px solid rgba(255, 106, 61, 0.25);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 14px;
  color: var(--fg);
  line-height: 1.6;
}

.callout strong {
  color: var(--accent);
}

.page-guide table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}

.page-guide th,
.page-guide td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}

.page-guide th {
  color: var(--fg);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-guide td {
  color: var(--fg-muted);
}

.page-guide td strong,
.page-guide td code {
  color: var(--fg);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--fg-muted);
  margin-bottom: 24px;
  letter-spacing: 0.08em;
}

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

/* ---------- responsive ---------- */

@media (max-width: 700px) {
  .topbar {
    padding: 18px 24px 16px;
  }

  .topbar-inner,
  .topbar-left {
    gap: 14px;
  }

  .brand-logo {
    width: 240px;
    height: auto;
  }

  .topnav {
    gap: 20px;
  }

  .app-main {
    padding: 56px 24px 80px;
  }

  .hero h1 {
    font-size: clamp(36px, 10vw, 48px);
  }

  .hero .lede {
    font-size: 16px;
  }

  .actions {
    align-items: flex-start;
  }

  .row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .row .role {
    padding-top: 0;
  }

  .page-guide .container {
    padding: 48px 24px 80px;
  }

  .page-guide h1 {
    font-size: 38px;
  }
}

@media (max-width: 420px) {
  .brand-logo {
    width: 200px;
  }

  .topnav {
    gap: 16px;
  }

  .topnav a {
    font-size: 11px;
  }

  .cta-pill.primary {
    width: 100%;
    justify-content: center;
  }
}