/* Verros Robotics marketing site
   Monochrome: black, white, and grays for borders, surfaces, and secondary text.
   Layout language: floating frosted nav, centered hero, faint vertical grid lines,
   stat tiles with thin top rules, rounded cards with hairline borders. */

:root {
  --black: #000000;
  --white: #ffffff;
  --gray-950: #0a0a0a;
  --gray-900: #121212;
  --gray-800: #1e1e1e;
  --gray-700: #2e2e2e;
  --gray-500: #7a7a7a;
  --gray-400: #9a9a9a;
  --gray-300: #c4c4c4;
  --gray-100: #e8e8e8;

  /* Default scheme: black background, white text */
  --bg: var(--black);
  --fg: var(--white);
  --muted: var(--gray-400);
  --line: var(--gray-800);
  --line-strong: var(--gray-700);
  --surface: var(--gray-950);
  --field-bg: var(--black);
  --grid: rgba(255, 255, 255, 0.05);

  --font: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", Menlo, monospace;

  --container: 1240px;
  --gutter: 16px;
  --radius: 16px;
  --radius-sm: 10px;
  --nav-h: 64px;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

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

h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.025em; line-height: 1.05; }
p { margin: 0; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  position: relative;
}
@media (min-width: 720px) { :root { --gutter: 32px; } }
@media (min-width: 1100px) { :root { --gutter: 48px; } }

.container.narrow { max-width: 760px; text-align: center; }
.container.narrow .lead { margin-left: auto; margin-right: auto; }

.sr-only {
  position: absolute !important;
  width: 1px !important; height: 1px !important;
  min-height: 0 !important;
  padding: 0 !important; margin: -1px !important;
  overflow: hidden !important; clip: rect(0 0 0 0) !important;
  white-space: nowrap !important; border: 0 !important;
}

.skip-link {
  position: absolute; left: 16px; top: -100px;
  background: var(--white); color: var(--black);
  padding: 8px 12px; z-index: 100; text-decoration: none; border-radius: 6px;
}
.skip-link:focus { top: 16px; }

/* Faint vertical grid lines across the whole page */
.gridlines {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  max-width: var(--container); margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid; grid-template-columns: repeat(4, 1fr);
}
.gridlines span { border-left: 1px solid var(--grid); }
.gridlines span:last-child { position: absolute; right: var(--gutter); top: 0; bottom: 0; border-left: 1px solid var(--grid); }
main, .footer, .announce, .nav-wrap { position: relative; z-index: 1; }

/* Inverted sections: white background, black text */
.section-invert {
  --bg: var(--white);
  --fg: var(--black);
  --muted: var(--gray-500);
  --line: var(--gray-100);
  --line-strong: var(--gray-300);
  --surface: var(--white);
  --field-bg: var(--white);
  background: var(--bg);
  color: var(--fg);
}

/* Announcement bar */
.announce {
  background: var(--white);
  color: var(--black);
  text-align: center;
  font-size: 14px;
  padding: 10px var(--gutter);
}
.announce a { font-weight: 600; }

/* Floating frosted nav */
.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 12px var(--gutter) 0;
}
.nav {
  max-width: var(--container);
  margin: 0 auto;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 12px 0 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  background: rgba(10, 10, 10, 0.72);
  -webkit-backdrop-filter: blur(16px) saturate(120%);
  backdrop-filter: blur(16px) saturate(120%);
  position: relative;
}
.brand {
  display: inline-flex; align-items: center; gap: 12px;
  text-decoration: none;
}
.brand-mark { display: block; flex: none; }
.brand-name { font-weight: 600; font-size: 21px; letter-spacing: -0.01em; }

.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a:not(.btn) {
  text-decoration: none; font-size: 16px; color: var(--gray-300);
  padding: 8px 14px; border-radius: 8px;
  transition: color 120ms ease, background-color 120ms ease;
}
.nav-links a:not(.btn):hover { color: var(--white); background: rgba(255, 255, 255, 0.06); }
.nav-links .btn { margin-left: 8px; }

.nav-toggle {
  display: none;
  background: none; border: 1px solid rgba(255, 255, 255, 0.3); color: var(--white);
  font: inherit; font-size: 14px; padding: 8px 14px; cursor: pointer; border-radius: 8px;
}

@media (max-width: 719px) {
  .nav-toggle { display: inline-block; }
  .nav-links {
    display: none;
    position: absolute; left: 0; right: 0; top: calc(var(--nav-h) + 8px);
    flex-direction: column; align-items: stretch; gap: 4px;
    padding: 8px;
    background: var(--gray-950);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 14px;
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
  }
  .nav-links.is-open { display: flex; }
  .nav-links a:not(.btn) { padding: 14px 16px; }
  .nav-links .btn { margin: 8px 0 0; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 28px;
  font: inherit; font-size: 16px; font-weight: 500; letter-spacing: 0.01em;
  text-decoration: none; cursor: pointer;
  border: 1px solid var(--fg); border-radius: 999px;
  transition: background-color 140ms ease, color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}
.btn-sm { min-height: 42px; padding: 0 20px; font-size: 15px; }
.btn-solid { background: var(--fg); color: var(--bg); }
.btn-solid:hover { box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.14); }
.section-invert .btn-solid:hover { box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.14); }
.btn-outline { background: transparent; color: var(--fg); border-color: rgba(255, 255, 255, 0.35); }
.btn-outline:hover { border-color: var(--fg); background: rgba(255, 255, 255, 0.06); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: wait; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* Typography helpers */
.eyebrow {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 18px;
}
.lead { font-size: 20px; line-height: 1.55; color: var(--muted); max-width: 44ch; font-weight: 300; }
.section-head { max-width: 780px; margin-bottom: 56px; }
.section-head .lead { margin-top: 22px; }

/* Hero: centered, large headline, large media below */
.hero { padding: 96px 0 40px; text-align: center; }
.hero-inner { display: flex; flex-direction: column; align-items: center; }
.hero h1 {
  font-size: clamp(48px, 9vw, 112px);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.035em;
  max-width: 12ch;
}
.hero-sub {
  margin-top: 28px;
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 500;
  letter-spacing: -0.01em;
}
.hero-body {
  margin-top: 20px;
  max-width: 62ch;
  font-size: 18px;
  font-weight: 300;
  color: var(--muted);
}
.hero .btn-row { margin-top: 40px; justify-content: center; }

.hero-media { margin-top: 80px; position: relative; }
.glow {
  position: absolute; left: 50%; top: 40%;
  width: 70%; height: 70%;
  transform: translate(-50%, -50%);
  background: radial-gradient(closest-side, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0));
  filter: blur(40px);
  pointer-events: none;
}

/* Placeholders: clearly marked, no invented imagery */
.placeholder {
  position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--gray-500);
  background:
    linear-gradient(to right, var(--line) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(to bottom, var(--line) 1px, transparent 1px) 0 0 / 56px 56px,
    var(--gray-950);
  overflow: hidden;
}
.placeholder-render { aspect-ratio: 16 / 9; width: 100%; }
.placeholder-tag {
  position: absolute; top: 16px; left: 16px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  border: 1px solid var(--gray-700); border-radius: 999px; padding: 5px 10px;
}
.placeholder-text { font-family: var(--mono); font-size: 14px; letter-spacing: 0.08em; }
.placeholder-inline { color: var(--muted); font-style: normal; }

/* Sections */
.section { padding: 128px 0; }
.section h2 { font-size: clamp(34px, 4.6vw, 60px); }
.section .eyebrow + h2 { margin-bottom: 0; }

/* Cards (mission) */
.cards { display: grid; gap: 16px; }
@media (min-width: 720px) { .cards { grid-template-columns: repeat(3, 1fr); } }
.card {
  position: relative;
  padding: 36px 32px 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 160ms ease, transform 160ms ease;
}
.card:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.card-index { display: block; font-family: var(--mono); font-size: 12px; color: var(--gray-500); letter-spacing: 0.1em; margin-bottom: 48px; }
.card h3 { font-size: 26px; margin-bottom: 14px; }
.card p { color: var(--muted); font-weight: 300; }

/* Stats grid (product) */
.stats { display: grid; gap: 48px 32px; }
@media (min-width: 560px) { .stats { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .stats { grid-template-columns: repeat(3, 1fr); gap: 64px 48px; } }
.stat { border-top: 1px solid var(--gray-500); padding-top: 24px; }
.stat-value {
  font-size: clamp(56px, 6vw, 84px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  display: flex; align-items: baseline; gap: 10px;
}
.stat-unit { font-size: 0.4em; font-weight: 500; letter-spacing: 0; color: var(--gray-300); }
.stat-label { margin-top: 14px; font-size: 16px; color: var(--gray-300); }
.stat-pending .stat-value { color: var(--gray-500); }
.stat-pending .stat-unit { color: var(--gray-500); }
.stat-tag {
  display: inline-block; margin-top: 12px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--gray-400);
  border: 1px solid var(--gray-700); border-radius: 999px; padding: 5px 10px;
}
.stats-note { margin-top: 64px; color: var(--muted); font-size: 16px; }

/* Preorder band (inverted) */
#preorder .form-inline { margin-left: auto; margin-right: auto; }
#preorder .form-success { text-align: left; }

/* Forms */
.form { margin-top: 40px; }
.form input, .form textarea {
  width: 100%;
  background: var(--field-bg);
  color: var(--fg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font: inherit; font-size: 16px;
  padding: 14px 16px;
  min-height: 52px;
  transition: border-color 120ms ease;
}
.form textarea { resize: vertical; min-height: 140px; }
.form input::placeholder, .form textarea::placeholder { color: var(--gray-500); }
.form input:hover, .form textarea:hover { border-color: var(--gray-500); }
.form input:focus, .form textarea:focus { outline: 2px solid var(--fg); outline-offset: 0; border-color: var(--fg); }
.form input[aria-invalid="true"], .form textarea[aria-invalid="true"] { outline: 2px solid var(--fg); outline-offset: 0; }

.form-inline { display: grid; gap: 12px; max-width: 560px; }
@media (min-width: 560px) {
  .form-inline { grid-template-columns: 1fr auto; }
  .form-inline .form-error { grid-column: 1 / -1; }
}
.form-inline input { border-radius: 999px; padding-left: 22px; }

.field { display: flex; flex-direction: column; gap: 8px; }
.field label { font-size: 14px; font-weight: 500; color: var(--gray-300); }
.field-grid { display: grid; gap: 20px; }
@media (min-width: 640px) {
  .field-grid { grid-template-columns: 1fr 1fr; }
  .field-full { grid-column: 1 / -1; }
}
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 28px; }

.form-error { font-size: 14px; color: var(--muted); min-height: 1.2em; }
.form-error:empty { display: none; }

.form-success {
  margin-top: 40px; padding: 28px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
}
.success-title { font-size: 22px; font-weight: 600; margin-bottom: 8px; }
.form-success p + p { color: var(--muted); }
.form-success a { word-break: break-all; }

/* Contact */
.contact-grid { display: grid; gap: 48px; }
@media (min-width: 900px) {
  .contact-grid { grid-template-columns: 1fr 1.3fr; gap: 80px; align-items: start; }
}
.panel {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.panel .form, .panel .form-success { margin-top: 0; }
.panel .form-success { border: 0; padding: 0; background: none; }
@media (max-width: 559px) { .panel { padding: 20px; } }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 72px 0 32px; }
.footer-grid { display: grid; gap: 40px; }
@media (min-width: 720px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.footer-brand .brand-name { font-size: 18px; }
.footer-sub { color: var(--muted); margin-top: 16px; }
.footer-link { display: inline-block; margin-top: 8px; }
.footer-nav, .footer-social { display: flex; flex-direction: column; gap: 12px; }
.footer-nav a, .footer-social a { text-decoration: none; color: var(--gray-300); }
.footer-nav a:hover, .footer-social a:hover { color: var(--white); text-decoration: underline; }
.footer-label { font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.footer-bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }
}