:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --surface: #f6f7f9;
  --text: #15171c;
  --muted: #586070;
  --border: #e2e5ea;
  --accent: #1d4ed8;
  --accent-hover: #1e40af;
  --on-accent: #ffffff;
  --success: #15803d;
  --error: #b91c1c;
  --radius: 12px;
  --max: 68rem;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1014;
    --surface: #161920;
    --text: #e7e9ee;
    --muted: #9ba3b1;
    --border: #272c36;
    --accent: #7ea2ff;
    --accent-hover: #a3bdff;
    --on-accent: #0e1014;
    --success: #4ade80;
    --error: #f87171;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1rem/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

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

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

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  top: -3rem;
  left: 1rem;
  z-index: 10;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  background: var(--accent);
  color: var(--on-accent);
}

.skip-link:focus {
  top: 1rem;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}

.brand {
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

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

.brand .bracket {
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 600;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links {
  display: flex;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

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

.lang-switch {
  display: flex;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.lang-switch a {
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
}

.lang-switch a:hover {
  color: var(--text);
}

.lang-switch a[aria-current="page"] {
  background: var(--text);
  color: var(--bg);
}

@media (max-width: 760px) {
  .nav-links {
    display: none;
  }
}

/* Hero */

.hero {
  padding-block: clamp(4rem, 12vw, 8rem) clamp(3rem, 8vw, 5rem);
}

.availability {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1.5rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.875rem;
}

.availability::before {
  content: "";
  flex: none;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--success);
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.hero h1 {
  max-width: 20ch;
  margin: 0;
  font-size: clamp(2.1rem, 6vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
}

.lead {
  max-width: 58ch;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.trust {
  margin: 1.75rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.6rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

.button-primary {
  background: var(--accent);
  color: var(--on-accent);
}

.button-primary:hover {
  background: var(--accent-hover);
  color: var(--on-accent);
}

.button-secondary {
  border-color: var(--border);
  color: var(--text);
}

.button-secondary:hover {
  border-color: var(--text);
  color: var(--text);
}

.button:disabled {
  opacity: 0.6;
  cursor: progress;
}

/* Sections */

.section {
  padding-block: clamp(3rem, 8vw, 5rem);
  border-top: 1px solid var(--border);
  scroll-margin-top: 4rem;
}

.section h2 {
  margin: 0 0 2rem;
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.section h2:has(+ .section-intro) {
  margin-bottom: 0.75rem;
}

.section-intro {
  max-width: 58ch;
  margin: 0 0 2.5rem;
  color: var(--muted);
}

h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
  line-height: 1.35;
}

.muted {
  margin: 0;
  color: var(--muted);
}

/* 1 → 2 → 4 columns, so four items never leave one orphan on its own row */
.cards,
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 600px) {
  .cards,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .cards,
  .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.card-index {
  display: block;
  margin-bottom: 1rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.usecases {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem 2.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 600px) {
  .usecases {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .usecases {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.usecases li {
  padding-left: 1rem;
  border-left: 2px solid var(--accent);
}

.steps {
  gap: 2rem 1.5rem;
}

.step-number {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--accent);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.why-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 3rem;
}

@media (max-width: 800px) {
  .why-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

.checklist {
  display: grid;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.checklist li {
  position: relative;
  padding-left: 2rem;
}

.checklist li::before {
  content: "✓";
  position: absolute;
  top: 0;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.why-aside h3 {
  margin-bottom: 1rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tags li {
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.9rem;
}

.prose {
  max-width: 65ch;
}

.prose p {
  margin: 0 0 1rem;
}

.prose p:last-child {
  margin-bottom: 0;
}

/* FAQ */

.faq {
  max-width: 50rem;
  border-top: 1px solid var(--border);
}

.faq details {
  border-bottom: 1px solid var(--border);
}

.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0;
  font-weight: 600;
  list-style: none;
  cursor: pointer;
}

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

.faq summary::after {
  content: "+";
  flex: none;
  color: var(--accent);
  font-size: 1.4rem;
  font-weight: 400;
  line-height: 1;
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

/* Contact */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 3rem;
}

@media (max-width: 800px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

.form {
  display: grid;
  gap: 1.1rem;
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field label {
  font-size: 0.95rem;
  font-weight: 600;
}

.field .optional {
  color: var(--muted);
  font-weight: 400;
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.field input,
.field textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

.field input:focus,
.field textarea:focus {
  border-color: var(--accent);
}

.field textarea {
  min-height: 9rem;
  resize: vertical;
}

.form .button {
  justify-self: start;
}

/* Spam honeypot: hidden from people; the Worker drops submissions that fill it in. */
.hp {
  display: none;
}

.form-status {
  min-height: 1.6em;
  margin: 0;
  font-weight: 500;
}

.form-status[data-state="success"] {
  color: var(--success);
}

.form-status[data-state="error"] {
  color: var(--error);
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.contact-list {
  display: grid;
  gap: 1.25rem;
  align-content: start;
  margin: 0;
}

.contact-list dt {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.contact-list dd {
  margin: 0.2rem 0 0;
  overflow-wrap: anywhere;
}

/* Footer */

.site-footer {
  padding-block: 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

.legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 0;
}

/* 404 */

.message-page {
  display: grid;
  place-content: center;
  gap: 0.75rem;
  min-height: 80vh;
  text-align: center;
}

.message-page h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3rem);
  letter-spacing: -0.02em;
}

.message-page p {
  margin: 0;
  color: var(--muted);
}