/* Driven landing page. Plain CSS, no framework, no external fonts. ASCII only. */

:root {
  --teal: #0F766E;
  --teal-dark: #0B5A54;
  --teal-darker: #083F3B;
  --ink: #14201f;
  --body: #33433f;
  --muted: #5b6b67;
  --bg: #ffffff;
  --bg-alt: #f1f7f6;
  --border: #d7e3e0;
  --card: #ffffff;
  --on-teal: #ffffff;
  --focus: #0a4f49;
  --maxw: 1080px;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eaf4f2;
    --body: #c4d6d2;
    --muted: #93a8a3;
    --bg: #0d1716;
    --bg-alt: #122220;
    --border: #1f3633;
    --card: #14211f;
    --focus: #5eead4;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  line-height: 1.6;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

a {
  color: var(--teal);
}

@media (prefers-color-scheme: dark) {
  a {
    color: #5eead4;
  }
}

a:hover {
  text-decoration: none;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.05em 0.35em;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--teal);
  color: var(--on-teal);
  padding: 10px 16px;
  z-index: 100;
  border-radius: 0 0 8px 0;
}

.skip-link:focus {
  left: 0;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  border-radius: 8px;
  display: block;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.header-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.header-nav a {
  color: var(--body);
  text-decoration: none;
  font-weight: 500;
}

.header-nav a:hover {
  color: var(--teal);
  text-decoration: underline;
}

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--teal) 0%, var(--teal-darker) 100%);
  color: var(--on-teal);
  text-align: center;
  padding: 72px 0 84px;
}

.hero-mark {
  border-radius: 22px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  margin-bottom: 8px;
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  margin: 12px 0 8px;
  letter-spacing: -0.02em;
  color: var(--on-teal);
}

.hero-tagline {
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  font-weight: 600;
  margin: 0 auto 16px;
  max-width: 30ch;
  color: var(--on-teal);
}

.hero-sub {
  font-size: 1.05rem;
  margin: 0 auto 28px;
  max-width: 58ch;
  color: rgba(255, 255, 255, 0.92);
}

.hero-note {
  margin-top: 22px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.82);
}

/* Buttons */
.cta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
  font-size: 1.05rem;
  border: 2px solid transparent;
  transition: transform 0.08s ease, background 0.15s ease, color 0.15s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--on-teal);
  color: var(--teal-darker);
}

.btn-primary:hover {
  background: #eafffb;
}

.btn-secondary {
  background: transparent;
  color: var(--on-teal);
  border-color: rgba(255, 255, 255, 0.7);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* Sections */
.section {
  padding: 64px 0;
}

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

.section-title {
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  color: var(--ink);
  margin: 0 0 28px;
  letter-spacing: -0.01em;
}

.section-lead {
  font-size: 1.08rem;
  max-width: 66ch;
  margin: 0 0 18px;
}

.section-note {
  font-size: 0.95rem;
  color: var(--muted);
  max-width: 66ch;
  margin: 22px 0;
}

/* Feature grid */
.feature-grid,
.platform-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.feature,
.platform {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 22px 20px;
}

.feature h3,
.platform h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  color: var(--ink);
}

.feature p,
.platform p {
  margin: 0;
  color: var(--body);
}

.feature h3::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 10px;
  border-radius: 3px;
  background: var(--teal);
  vertical-align: middle;
}

.platform-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-bottom: 24px;
}

/* Footer */
.site-footer {
  background: var(--teal-darker);
  color: rgba(255, 255, 255, 0.9);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--on-teal);
  margin: 0;
}

.footer-nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--on-teal);
  text-decoration: underline;
}

@media (max-width: 600px) {
  .hero {
    padding: 56px 0 64px;
  }

  .section {
    padding: 48px 0;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}