:root {
  color-scheme: dark;
  --bg: #0a121d;
  --bg-soft: #111d2d;
  --panel: rgba(18, 31, 47, 0.92);
  --panel-strong: #17263a;
  --line: rgba(173, 200, 239, 0.16);
  --text: #f1f5fb;
  --muted: #a8b8cf;
  --accent: #80c4ff;
  --accent-strong: #5daff6;
  --accent-soft: rgba(128, 196, 255, 0.12);
  --success: #8ad3b2;
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.28);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(91, 161, 255, 0.13), transparent 24rem),
    radial-gradient(circle at top right, rgba(122, 214, 255, 0.08), transparent 18rem),
    linear-gradient(180deg, #08111c 0%, #13253a 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.site-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding-bottom: 64px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
  backdrop-filter: blur(14px);
  background: rgba(8, 17, 28, 0.82);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background:
    #244df6 url("./assets/heyvision-brand-mark.png?v=20260424-brand-1")
    center center / 175% auto no-repeat;
  color: white;
  font-weight: 800;
  box-shadow: var(--shadow);
}

.brand-text {
  font-size: 1.05rem;
  font-weight: 700;
}

.nav-links,
.top-actions,
.hero-actions,
.download-actions,
.contact-card,
.download-meta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-links a {
  color: var(--muted);
  font-weight: 600;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 14px 24px;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, #89ccff, #74b7ff);
  color: #062039;
  font-weight: 800;
}

.btn-soft {
  background: rgba(148, 191, 255, 0.1);
  border-color: rgba(148, 191, 255, 0.18);
  color: var(--text);
}

.btn-outline {
  background: transparent;
  border-color: rgba(173, 200, 239, 0.18);
  color: var(--text);
}

.btn-large {
  padding-inline: 30px;
}

.hero,
.section {
  padding: 42px 0;
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 44px;
  align-items: center;
  min-height: calc(100vh - 96px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  margin: 0 0 20px;
  padding: 12px 18px;
  border-radius: 999px;
  background: rgba(150, 185, 255, 0.08);
  border: 1px solid rgba(150, 185, 255, 0.14);
  color: var(--accent);
  font-weight: 700;
}

h1,
h2,
h3 {
  margin: 0;
}

h1 {
  font-size: clamp(3.3rem, 7vw, 5.6rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
  max-width: 8ch;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
  margin-bottom: 14px;
}

h3 {
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.hero-text,
.section-heading p,
.capability-card p,
.step-card p,
.usage-card p,
.download-copy,
.hero-note {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.hero-copy {
  max-width: 640px;
}

.hero-note {
  margin-top: 18px;
  max-width: 50ch;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.device-showcase {
  display: block;
  width: min(100%, 640px);
  height: auto;
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.device-frame,
.download-card,
.capability-card,
.step-card,
.usage-card,
.contact-card {
  background: rgba(18, 31, 47, 0.9);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.device-frame {
  width: min(100%, 520px);
  border-radius: 34px;
  padding: 18px;
}

.device-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  color: #d6e4f7;
}

.device-lens {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f6e0a8, #8eb1ff);
}

.device-screen {
  min-height: 340px;
  border-radius: 24px;
  overflow: hidden;
}

.scenic-screen {
  position: relative;
  background:
    linear-gradient(180deg, rgba(5, 12, 22, 0.28), rgba(5, 12, 22, 0.1)),
    url("./assets/heyvision-hero-scene.png?v=20260424-hero-1");
  background-size: cover;
  background-position: center;
}

.scenic-screen::before,
.scenic-screen::after {
  content: "";
  position: absolute;
  inset: 0;
}

.scenic-screen::before {
  background:
    radial-gradient(circle at 50% 18%, rgba(255, 255, 255, 0.18), transparent 28%);
}

.scenic-screen::after {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), transparent 24%),
    linear-gradient(0deg, rgba(8, 16, 25, 0.18), transparent 32%);
  opacity: 1;
}

.phone-overlay {
  position: absolute;
  left: 10%;
  right: 10%;
  bottom: 14%;
  z-index: 1;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(32, 38, 47, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.24);
  backdrop-filter: blur(8px);
}

.overlay-header {
  margin-bottom: 6px;
  font-size: 0.92rem;
  font-weight: 700;
}

.overlay-text {
  color: #eef5ff;
  font-size: 0.96rem;
  line-height: 1.5;
}

.device-caption {
  margin-top: 12px;
  color: var(--muted);
  line-height: 1.5;
}

.section-heading {
  max-width: 820px;
  margin-bottom: 28px;
}

.section-heading.narrow {
  max-width: 680px;
}

.capability-grid,
.steps-grid,
.usage-grid {
  display: grid;
  gap: 18px;
}

.capability-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.steps-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.usage-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.capability-card,
.step-card,
.usage-card,
.contact-card,
.download-card {
  border-radius: var(--radius-lg);
  padding: 22px;
}

.mini-shot {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 180px;
  margin-bottom: 16px;
  padding: 16px;
  border-radius: 20px;
  overflow: hidden;
  background-repeat: no-repeat;
  background-size: 300% 100%;
  background-image:
    linear-gradient(180deg, rgba(6, 11, 18, 0.02) 0%, rgba(6, 11, 18, 0.16) 35%, rgba(6, 11, 18, 0.82) 100%),
    url("./assets/heyvision-capability-triptych.png?v=20260424-visual-1");
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.mini-shot-walk {
  background-position: left center;
}

.mini-shot-see {
  background-position: center center;
}

.mini-shot-read {
  background-position: right center;
}

.mini-title {
  font-size: 1rem;
  font-weight: 800;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

.mini-subtitle {
  color: rgba(255, 255, 255, 0.78);
  margin-top: 4px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

.section-download {
  padding-top: 20px;
}

.download-card {
  display: grid;
  gap: 18px;
}

.download-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.download-label {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 800;
}

.download-actions {
  flex-direction: column;
  align-items: flex-start;
  min-width: 240px;
}

.text-link {
  color: var(--accent);
  font-weight: 700;
}

.meta-pill {
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #cfe7ff;
  border: 1px solid rgba(132, 188, 255, 0.16);
}

.download-feedback {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(138, 211, 178, 0.12);
  border: 1px solid rgba(138, 211, 178, 0.18);
  color: #d7f6ea;
  font-weight: 600;
}

.step-number {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 12px;
  border-radius: 14px;
  background: rgba(128, 196, 255, 0.16);
  color: var(--accent);
  font-weight: 900;
}

.contact-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.hidden {
  display: none;
}

@media (max-width: 1120px) {
  .hero,
  .capability-grid,
  .steps-grid,
  .usage-grid,
  .download-main {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .hero {
    min-height: auto;
  }

  .download-actions {
    width: 100%;
  }
}

@media (max-width: 820px) {
  .site-shell {
    width: min(100% - 24px, 1240px);
  }

  .topbar {
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero,
  .section {
    padding: 30px 0;
  }

  h1 {
    max-width: none;
  }

  .hero-actions,
  .top-actions,
  .download-meta,
  .contact-card {
    flex-direction: column;
    align-items: stretch;
  }

  .btn,
  .download-actions .text-link {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
}