/* RA Tracker — landing page */

.container {
  width: min(1140px, 100% - 32px);
  margin-inline: auto;
}

.small {
  font-size: 13px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-strong);
}

:root[data-theme="dark"] .eyebrow {
  color: var(--brand);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .eyebrow {
    color: var(--brand);
  }
}

.lead {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-2);
  max-width: 34em;
}

.lead.small {
  font-size: 15.5px;
}

/* ---- Header ----------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 66px;
}

.nav-links {
  display: flex;
  gap: 4px;
  margin-left: 16px;
}

.nav-links a {
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--text);
  background: var(--surface-2);
}

.nav-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---- Hero ------------------------------------------------------------- */

.hero {
  padding: 72px 0 64px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% -10% auto auto;
  width: 720px;
  height: 720px;
  background: radial-gradient(closest-side, var(--brand-soft), transparent 70%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 68px);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.02;
  margin: 18px 0 20px;
}

.hero h1 .serif,
.section-head h2 .serif,
.cta h2 .serif {
  font-style: italic;
  color: var(--brand);
  letter-spacing: -0.02em;
}

.hero-search {
  margin-top: 30px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 6px 6px 18px;
  max-width: 540px;
  border-radius: var(--radius-pill);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.hero-search:focus-within {
  border-color: var(--brand);
  box-shadow: var(--shadow), var(--ring);
}

.hero-search > .icon {
  color: var(--text-3);
}

.hero-search input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  height: 40px;
  color: var(--text);
  font-size: 15px;
}

.hero-search input::placeholder {
  color: var(--text-3);
}

.hero-try {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 13px;
}

/* Hero preview mock */
.hero-preview {
  position: relative;
  padding: 24px 0 40px;
}

.preview-card {
  padding: 22px;
  border-radius: 22px;
  box-shadow: var(--shadow-lg);
  transform: rotate(-1.2deg);
}

.preview-head {
  display: flex;
  align-items: center;
  gap: 10px;
}

.preview-query {
  font-weight: 600;
  color: var(--text);
}

.preview-time {
  margin-left: auto;
  font-size: 12px;
}

.preview-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 18px 0;
}

.preview-stats > div {
  padding: 12px;
  border-radius: var(--radius);
  background: var(--surface-2);
}

.preview-stats span,
.strip strong,
.preview-float strong {
  font-family: var(--font-figures);
  font-variant-numeric: tabular-nums;
}

.preview-stats span {
  display: block;
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
}

.preview-stats small {
  font-size: 12px;
  color: var(--text-3);
}

.preview-bars {
  display: grid;
  gap: 8px;
}

.pbar {
  position: relative;
  height: 30px;
  border-radius: 8px;
  background: var(--surface-2);
  overflow: hidden;
}

.pbar span {
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--w);
  background: var(--brand-soft);
  border-right: 2px solid var(--brand);
}

.pbar em {
  position: relative;
  font-style: normal;
  font-size: 13px;
  line-height: 30px;
  padding-left: 12px;
  color: var(--text);
}

.preview-mix {
  display: flex;
  gap: 3px;
  height: 8px;
  margin-top: 18px;
}

.preview-mix span {
  width: var(--w);
  background: var(--c);
  border-radius: 4px;
}

.preview-float {
  position: absolute;
  left: -28px;
  bottom: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  transform: rotate(1.5deg);
}

.preview-float strong {
  display: block;
  color: var(--text);
  font-size: 15px;
}

.preview-float small {
  color: var(--text-3);
  font-size: 12px;
}

.float-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--brand);
  color: var(--on-brand);
}

/* ---- Strip ------------------------------------------------------------ */

.strip {
  border-block: 1px solid var(--border);
  background: var(--bg-elevated);
}

.strip-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.strip-inner > div {
  padding: 22px 20px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  border-left: 1px solid var(--border);
}

.strip-inner > div:first-child {
  border-left: 0;
}

.strip strong {
  font-size: 24px;
  font-weight: 600;
  color: var(--text);
}

.strip span {
  font-size: 13.5px;
  color: var(--text-2);
}

/* ---- Sections --------------------------------------------------------- */

.section {
  padding: 96px 0;
}

.section-alt {
  background: var(--bg-elevated);
  border-block: 1px solid var(--border);
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-head.left {
  text-align: left;
  margin-bottom: 0;
}

.section-head h2 {
  font-size: clamp(30px, 4vw, 44px);
  letter-spacing: -0.03em;
  margin-top: 12px;
}

.section-head .lead {
  margin-top: 16px;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature {
  padding: 30px 28px;
  background: var(--surface);
  transition: background-color 0.2s ease;
}

.feature:hover {
  background: var(--bg-elevated);
}

.feature-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand);
  margin-bottom: 18px;
}

.feature h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.feature p {
  font-size: 14.5px;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.steps li {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
}

.step-num {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--brand-soft);
  margin-bottom: 18px;
}

.steps h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.metrics-grid,
.faq-wrap {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 64px;
  align-items: start;
}

.metric-list {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border);
}

.metric-list > div {
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
}

.metric-list dt {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.metric-list dt .mono {
  font-size: 11.5px;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--brand-soft);
  color: var(--brand);
  min-width: 52px;
  text-align: center;
}

.metric-list dd {
  margin: 0;
  padding-left: 64px;
  font-size: 14.5px;
}

.faq {
  display: grid;
  gap: 10px;
}

.faq details {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 0 20px;
  transition: border-color 0.15s ease;
}

.faq details[open] {
  border-color: var(--border-strong);
}

.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 0;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--text-3);
  font-weight: 400;
  transition: transform 0.2s ease;
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq details p {
  padding-bottom: 18px;
  font-size: 14.5px;
}

/* ---- CTA & footer ----------------------------------------------------- */

.cta {
  padding: 96px 0;
}

.cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  text-align: center;
  padding: 64px 24px;
  border-radius: 28px;
  background: var(--brand-softer);
  border: 1px solid var(--brand-soft);
}

.cta h2 {
  font-size: clamp(32px, 5vw, 52px);
  letter-spacing: -0.035em;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 14px;
}

.footer-links a {
  color: var(--text-2);
}

.footer-inner > p {
  margin-left: auto;
}

/* ---- Responsive ------------------------------------------------------- */

@media (max-width: 960px) {
  .hero-grid,
  .metrics-grid,
  .faq-wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-preview {
    max-width: 480px;
    margin-left: 28px;
  }

  .features {
    grid-template-columns: 1fr 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 48px 0;
  }

  .hero-preview {
    margin-left: 0;
  }

  .preview-float {
    left: 8px;
  }

  .features {
    grid-template-columns: 1fr;
  }

  .strip-inner {
    grid-template-columns: 1fr 1fr;
  }

  .strip-inner > div:nth-child(3) {
    border-left: 0;
  }

  .strip-inner > div:nth-child(n + 3) {
    border-top: 1px solid var(--border);
  }

  .strip-inner > div {
    flex-direction: column;
    gap: 2px;
  }

  .section,
  .cta {
    padding: 64px 0;
  }

  .metric-list dd {
    padding-left: 0;
  }

  .nav-actions .theme-toggle button[data-value="system"],
  .nav-signin {
    display: none;
  }

  .nav {
    gap: 12px;
  }

  .footer-inner > p {
    margin-left: 0;
  }

  .hero-search .btn {
    padding: 0 14px;
  }
}