/* Neuron Flame — design system
   Voice-to-text at the speed of thought. */

:root {
  --bg: #0a0712;
  --bg-elev: #14101f;
  --bg-soft: #1c1730;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-strong: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);

  --text: #f5f3ff;
  --text-soft: #c8c1e0;
  --text-mute: #8a83a8;

  --flame-1: #7c3aed;   /* deep violet */
  --flame-2: #c026d3;   /* magenta */
  --flame-3: #f97316;   /* orange */
  --flame-4: #fbbf24;   /* amber */

  --grad-flame: linear-gradient(120deg, var(--flame-1) 0%, var(--flame-2) 45%, var(--flame-3) 85%, var(--flame-4) 100%);
  --grad-soft: linear-gradient(135deg, rgba(124,58,237,0.18), rgba(192,38,211,0.14) 45%, rgba(249,115,22,0.18));

  --shadow-1: 0 1px 2px rgba(0,0,0,0.4), 0 8px 24px rgba(124,58,237,0.18);
  --shadow-2: 0 12px 60px rgba(192,38,211,0.20);

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "SF Pro Text", "Segoe UI", Roboto, system-ui, sans-serif;
  --font-display: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Inter", system-ui, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  background:
    radial-gradient(1200px 700px at 80% -10%, rgba(192,38,211,0.18), transparent 60%),
    radial-gradient(1000px 600px at -10% 30%, rgba(124,58,237,0.20), transparent 55%),
    radial-gradient(900px 500px at 50% 110%, rgba(249,115,22,0.14), transparent 55%),
    var(--bg);
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--text); text-decoration: none; transition: color 0.15s ease, opacity 0.15s ease; }
a:hover { opacity: 0.85; }

img { max-width: 100%; display: block; }

/* ---- Layout ---- */
.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; margin: 0 auto; padding: 0 24px; }

/* ---- Nav ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  background: rgba(10, 7, 18, 0.6);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: 1120px;
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
}
.brand .mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--grad-flame);
  box-shadow: 0 4px 14px rgba(192,38,211,0.45);
  position: relative;
  overflow: hidden;
}
.brand .mark::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.4), transparent 50%);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  color: var(--text-soft);
}
.nav-links a:hover { color: var(--text); opacity: 1; }
.nav-cta {
  background: var(--grad-flame);
  color: white;
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 13px;
  box-shadow: 0 6px 18px rgba(192,38,211,0.35);
}

/* ---- Hero ---- */
.hero {
  padding: 96px 24px 80px;
  text-align: center;
  position: relative;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: 28px;
}
.eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--flame-3);
  box-shadow: 0 0 12px var(--flame-3);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50%      { opacity: 1;   transform: scale(1.25); }
}
h1.display {
  font-family: var(--font-display);
  font-size: clamp(40px, 7vw, 76px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 auto 24px;
  max-width: 920px;
}
.gradient-text {
  background: var(--grad-flame);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.55;
  color: var(--text-soft);
  max-width: 640px;
  margin: 0 auto 40px;
}

/* ---- Buttons ---- */
.cta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, opacity 0.15s ease;
  font-family: inherit;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--grad-flame);
  color: white;
  box-shadow: var(--shadow-1);
}
.btn-primary:hover { box-shadow: var(--shadow-2); }
.btn-secondary {
  background: var(--surface-strong);
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-secondary:hover { background: rgba(255,255,255,0.12); }
.btn-ghost {
  background: transparent;
  color: var(--text-soft);
}
.tiny-note {
  font-size: 13px;
  color: var(--text-mute);
  margin-top: 8px;
}

/* ---- Hero icon ----
   White card behind the brand-gradient icon so it pops against the dark
   page theme. The brand-gradient halo lives in the outer box-shadow (soft
   coloured glow underneath), not the card background — gives the same
   "alive" feeling without competing with the icon itself. */
.hero-icon {
  width: 168px;
  height: 168px;
  margin: 0 auto 36px;
  border-radius: 38px;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  box-shadow:
    0 30px 80px rgba(124, 58, 237, 0.55),
    0 12px 40px rgba(249, 115, 22, 0.40),
    0 0 0 1px rgba(255, 255, 255, 0.08);
  position: relative;
}
.hero-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  position: relative;
  z-index: 1;
}

/* ---- Sections ---- */
section { padding: 80px 24px; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--flame-3);
  margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.5vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 16px;
}
.section-sub {
  font-size: 17px;
  color: var(--text-soft);
  max-width: 560px;
  margin: 0 auto;
}

/* ---- Features grid ---- */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  max-width: 1120px;
  margin: 0 auto;
}
.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.feature:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  background: var(--surface-strong);
}
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--grad-soft);
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 22px;
}
.feature h3 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}
.feature p {
  margin: 0;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.55;
}

/* ---- How section ---- */
.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}
.step {
  text-align: center;
  padding: 0 16px;
}
.step-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--grad-flame);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 22px;
  color: white;
  box-shadow: 0 8px 24px rgba(192,38,211,0.35);
}
.step h4 {
  font-family: var(--font-display);
  font-size: 19px;
  margin: 0 0 8px;
}
.step p {
  margin: 0;
  color: var(--text-soft);
  font-size: 15px;
}

/* ---- Privacy callout ---- */
.callout {
  max-width: 840px;
  margin: 0 auto;
  padding: 48px 40px;
  border-radius: var(--radius-xl);
  background: var(--grad-soft);
  border: 1px solid var(--border-strong);
  text-align: center;
}
.callout h2 {
  font-family: var(--font-display);
  font-size: 32px;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}
.callout p {
  font-size: 16px;
  color: var(--text-soft);
  margin: 0 auto;
  max-width: 560px;
}

/* ---- Stats ---- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}
.stat-num {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--grad-flame);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label {
  font-size: 14px;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}

/* ---- Footer ---- */
footer {
  padding: 60px 24px 40px;
  border-top: 1px solid var(--border);
  margin-top: 80px;
  background: var(--bg-elev);
}
.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand p {
  color: var(--text-mute);
  font-size: 14px;
  max-width: 280px;
  margin-top: 12px;
}
.footer-col h5 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-mute);
  margin: 0 0 14px;
  font-weight: 600;
}
.footer-col a {
  display: block;
  color: var(--text-soft);
  font-size: 14px;
  padding: 4px 0;
}
.footer-col a:hover { color: var(--text); }
.legal {
  max-width: 1120px;
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-mute);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
@media (max-width: 720px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .nav-links a:not(.nav-cta) { display: none; }
}

/* ---- Docs ---- */
.docs-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 60px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 60px 24px;
}
.docs-side {
  position: sticky;
  top: 80px;
  align-self: start;
  height: fit-content;
}
.docs-side h5 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-mute);
  margin: 24px 0 8px;
  font-weight: 600;
}
.docs-side h5:first-child { margin-top: 0; }
.docs-side a {
  display: block;
  padding: 6px 12px;
  margin-left: -12px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-soft);
  transition: background 0.1s ease, color 0.1s ease;
}
.docs-side a:hover { background: var(--surface); color: var(--text); opacity: 1; }
.docs-side a.active {
  background: var(--surface-strong);
  color: var(--text);
  font-weight: 500;
}
.docs-content {
  min-width: 0;
}
.docs-content h1 {
  font-family: var(--font-display);
  font-size: 38px;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 12px;
}
.docs-content > p:first-of-type {
  font-size: 19px;
  color: var(--text-soft);
  line-height: 1.55;
  margin: 0 0 32px;
}
.docs-content h2 {
  font-family: var(--font-display);
  font-size: 26px;
  letter-spacing: -0.01em;
  margin: 48px 0 14px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.docs-content h2:first-of-type { border-top: 0; padding-top: 0; }
.docs-content h3 {
  font-family: var(--font-display);
  font-size: 19px;
  margin: 32px 0 10px;
}
.docs-content p, .docs-content li {
  font-size: 16px;
  color: var(--text-soft);
  line-height: 1.65;
}
.docs-content strong { color: var(--text); }
.docs-content ul, .docs-content ol { padding-left: 22px; }
.docs-content li { margin-bottom: 6px; }
.docs-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  color: #fcd34d;
}
.docs-content pre {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 18px 20px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 14px;
}
.docs-content pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--text);
}
.docs-content kbd {
  font-family: var(--font-mono);
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 1px 7px;
  font-size: 0.85em;
  color: var(--text);
}
.docs-content blockquote {
  border-left: 3px solid var(--flame-2);
  padding: 8px 18px;
  margin: 24px 0;
  background: var(--surface);
  border-radius: 0 8px 8px 0;
}
.docs-content blockquote p { margin: 0; color: var(--text-soft); font-style: italic; }
.docs-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
}
.docs-content th, .docs-content td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}
.docs-content th {
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
}
.callout-box {
  background: var(--grad-soft);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 24px 0;
}
.callout-box.warn { background: rgba(249, 115, 22, 0.12); border-color: rgba(249, 115, 22, 0.4); }
.callout-box.info { background: rgba(124, 58, 237, 0.12); border-color: rgba(124, 58, 237, 0.4); }
.callout-box p:first-child { margin-top: 0; }
.callout-box p:last-child { margin-bottom: 0; }

@media (max-width: 880px) {
  .docs-layout { grid-template-columns: 1fr; gap: 32px; }
  .docs-side { position: static; }
  section { padding: 56px 24px; }
  .hero { padding: 60px 24px 48px; }
}

/* ---- Docs hub cards ---- */
.docs-hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  max-width: 1000px;
  margin: 40px auto 0;
}
.doc-card {
  display: block;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.2s ease;
}
.doc-card:hover {
  background: var(--surface-strong);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.doc-card .doc-card-icon {
  font-size: 24px;
  margin-bottom: 10px;
}
.doc-card h3 {
  font-family: var(--font-display);
  font-size: 17px;
  margin: 0 0 6px;
}
.doc-card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-mute);
}

/* ---- Faq ---- */
.faq {
  max-width: 760px;
  margin: 40px auto 0;
}
.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 12px;
}
.faq details[open] {
  background: var(--surface-strong);
  border-color: var(--border-strong);
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-size: 22px;
  color: var(--text-mute);
  transition: transform 0.2s ease;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > p {
  margin: 12px 0 0;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.65;
}

/* ---- 404 ---- */
.errpage {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px;
}
.errpage .code {
  font-family: var(--font-display);
  font-size: 120px;
  font-weight: 700;
  letter-spacing: -0.04em;
  background: var(--grad-flame);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}

/* ============ SEO landing pages ============ */

.breadcrumbs {
  padding: 16px 0 0;
  font-size: 13px;
  color: var(--text-mute);
}
.breadcrumbs .container { padding: 0 24px; }
.breadcrumbs a { color: var(--text-soft); }
.breadcrumbs a:hover { color: var(--text); opacity: 1; }
.breadcrumbs .sep { margin: 0 6px; color: var(--text-mute); opacity: 0.6; }
.breadcrumbs [aria-current="page"] { color: var(--text); }

.compare-hero { padding: 72px 24px 56px; }
h1.display.compact {
  font-size: clamp(34px, 5.5vw, 60px);
  margin-bottom: 20px;
}

.long-body {
  padding: 32px 0 56px;
  max-width: 760px;
}
.long-body h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.02em;
  margin: 48px 0 14px;
}
.long-body h3 {
  font-family: var(--font-display);
  font-size: 19px;
  margin: 28px 0 10px;
}
.long-body p,
.long-body li {
  font-size: 16.5px;
  color: var(--text-soft);
  line-height: 1.7;
}
.long-body strong { color: var(--text); }
.long-body code {
  font-family: var(--font-mono);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.88em;
  color: #fcd34d;
}
.long-body ul, .long-body ol {
  padding-left: 22px;
  color: var(--text-soft);
}
.long-body li { margin-bottom: 8px; }

.compare-table-section { padding: 40px 24px; }
.compare-table {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  font-size: 15px;
}
.compare-table thead th {
  text-align: left;
  padding: 14px 18px;
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-mute);
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border-strong);
}
.compare-table thead th.us {
  color: var(--text);
  background: linear-gradient(135deg, rgba(124,58,237,0.18), rgba(192,38,211,0.14) 50%, rgba(249,115,22,0.18));
}
.compare-table tbody th {
  text-align: left;
  font-weight: 500;
  color: var(--text-soft);
  padding: 12px 18px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
  width: 32%;
}
.compare-table tbody td {
  padding: 12px 18px;
  color: var(--text-soft);
  border-bottom: 1px solid var(--border);
}
.compare-table tbody td.us {
  color: var(--text);
  font-weight: 500;
  background: rgba(124,58,237,0.06);
}
.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td {
  border-bottom: 0;
}

.closing-cta {
  text-align: center;
  padding: 80px 24px 100px;
}

@media (max-width: 720px) {
  .compare-table { font-size: 14px; }
  .compare-table thead th,
  .compare-table tbody th,
  .compare-table tbody td { padding: 10px 12px; }
  .breadcrumbs [aria-current="page"] { display: none; }
}