/* iiOTa — stealth landing
 * Palette: bg #0A0F14 / fg #E6ECEF / accent #5FA8B8
 * Type: Inter Tight (display + body), JetBrains Mono (labels/metadata)
 * Lighthouse-tuned: no framework, single CSS file, no layout shift, system fallbacks first.
 */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { background: #0A0F14; color-scheme: dark; }
body {
  font-family: "Inter Tight", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: #E6ECEF;
  background: #0A0F14;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
}

.mono { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }
.accent { color: #5FA8B8; }

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid #5FA8B8;
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- Page shell ---------- */
.page { position: relative; min-height: 100vh; overflow: hidden; }

.bg {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(1200px 800px at 80% 10%, rgba(95,168,184,0.18), transparent 65%),
    radial-gradient(1000px 700px at 10% 90%, rgba(95,168,184,0.12), transparent 70%),
    radial-gradient(900px 600px at 50% 50%, rgba(95,168,184,0.05), transparent 70%);
  animation: drift 28s ease-in-out infinite alternate;
  will-change: transform;
}
@keyframes drift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(-3%, 2%, 0) scale(1.06); }
}
@media (prefers-reduced-motion: reduce) {
  .bg { animation: none; }
}

.page > *:not(.bg) { position: relative; z-index: 1; }

/* ---------- Top ---------- */
.top {
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 40px 80px 0;
}
.wordmark {
  font-family: "Inter Tight", system-ui, sans-serif;
  font-weight: 500;
  font-size: clamp(48px, 6vw, 84px);
  letter-spacing: -0.025em;
  color: #E6ECEF;
  display: inline-flex; align-items: baseline;
  line-height: 1;
}
.wordmark .accent { color: #5FA8B8; }

/* ---------- Section markers ---------- */
.marker {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(230,236,239,0.4);
  padding-top: 14px;
}
.marker .accent {
  color: #5FA8B8; display: block; margin-bottom: 8px;
}

/* ---------- Hero ---------- */
.hero {
  padding: 160px 80px 120px;
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 48px;
}
.tag {
  font-size: clamp(40px, 7vw, 88px);
  line-height: 1.02;
  font-weight: 400;
  letter-spacing: -0.03em;
  max-width: 16ch;
  margin: 0;
  text-wrap: balance;
}

/* ---------- Divider ---------- */
.divider {
  margin: 0 80px;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(230,236,239,0.18), transparent);
}

/* ---------- Secondary ---------- */
.secondary {
  padding: 96px 80px;
  display: grid;
  grid-template-columns: 96px 1fr 1fr;
  gap: 48px;
}
.secondary .line {
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 300;
  margin: 0;
  max-width: 16ch;
}
.secondary .aside {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(230,236,239,0.45);
  max-width: 36ch;
  padding-top: 14px;
  margin: 0;
}

/* ---------- Briefing ---------- */
.briefing {
  background: rgba(6,11,15,0.5);
  border-top: 1px solid rgba(230,236,239,0.08);
  border-bottom: 1px solid rgba(230,236,239,0.08);
  padding: 88px 80px;
  display: grid;
  grid-template-columns: 96px 1fr 1.2fr;
  gap: 48px;
}
.briefing .intro h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 2.4vw, 32px);
  line-height: 1.15;
  font-weight: 400;
  letter-spacing: -0.02em;
}
.briefing .intro p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(230,236,239,0.55);
  max-width: 32ch;
}
.briefing .intro .ref {
  margin-top: 32px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: rgba(230,236,239,0.35);
  text-transform: uppercase;
}

/* ---------- Form ---------- */
.form-wrap { position: relative; }
.formgrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 24px;
}
.formgrid .full { grid-column: 1 / -1; }
.field label {
  display: block;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(230,236,239,0.5);
  margin-bottom: 8px;
}
.field label .opt {
  color: rgba(230,236,239,0.3);
  letter-spacing: 0.08em;
  text-transform: none;
  margin-left: 4px;
}
.field input {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(230,236,239,0.18);
  color: #E6ECEF;
  padding: 10px 0 12px;
  font: 400 15px "Inter Tight", system-ui, sans-serif;
  transition: border-color .15s;
  border-radius: 0;
}
.field input::placeholder { color: rgba(230,236,239,0.25); }
.field input:hover { border-bottom-color: rgba(230,236,239,0.3); }
.field input:focus {
  outline: 0;
  border-bottom-color: #5FA8B8;
}
.field input:user-invalid {
  border-bottom-color: rgba(200,80,70,0.7);
}

.cta {
  margin-top: 36px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: #5FA8B8;
  color: #06141A;
  padding: 14px 24px;
  font-family: "Inter Tight", system-ui, sans-serif;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.01em;
  border: 0;
  cursor: pointer;
  transition: background .15s, transform .15s;
  border-radius: 0;
  min-width: 200px;
}
.btn-primary:hover { background: #6FB8C8; }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled { background: rgba(95,168,184,0.4); cursor: progress; }
.btn-primary .spinner {
  display: none;
  width: 12px; height: 12px;
  border: 1.5px solid rgba(6,20,26,0.3);
  border-top-color: #06141A;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.btn-primary[data-loading="true"] .spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

.cta .legal {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: rgba(230,236,239,0.35);
  text-transform: uppercase;
}
.error {
  margin: 16px 0 0;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: #D4756B;
  min-height: 1em;
}
.error:empty { display: none; }

/* ---------- Confirmation ---------- */
.confirmation {
  padding: 8px 0;
  animation: confirm-in .4s ease-out;
}
@keyframes confirm-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.confirmation .check {
  width: 36px; height: 36px;
  border: 1px solid #5FA8B8;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #5FA8B8;
  margin-bottom: 20px;
}
.confirmation h3 {
  margin: 0 0 10px;
  font-size: 28px;
  font-weight: 400;
  letter-spacing: -0.02em;
}
.confirmation p {
  margin: 0;
  color: rgba(230,236,239,0.6);
  font-size: 14px;
  line-height: 1.7;
  max-width: 36ch;
}
.confirmation .ref-confirm {
  margin-top: 28px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: rgba(230,236,239,0.35);
  text-transform: uppercase;
}

/* ---------- Footer ---------- */
.foot {
  padding: 32px 80px 40px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  color: rgba(230,236,239,0.4);
  letter-spacing: 0.05em;
  gap: 24px;
  flex-wrap: wrap;
}
.foot .tag-foot { color: rgba(230,236,239,0.65); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .top { padding: 28px 28px 0; }
  .hero { padding: 88px 28px 64px; grid-template-columns: 1fr; gap: 24px; }
  .divider { margin: 0 28px; }
  .secondary { padding: 56px 28px; grid-template-columns: 1fr; gap: 20px; }
  .briefing { padding: 56px 28px; grid-template-columns: 1fr; gap: 32px; }
  .foot { padding: 24px 28px 32px; }
  .formgrid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .wordmark { font-size: 44px; }
  .tag { font-size: 38px; }
  .top { flex-direction: column; gap: 16px; align-items: flex-start; }
  .btn-primary { width: 100%; }
}