:root {
  --bg: #f7f6f2;
  --surface: rgba(255, 255, 255, 0.84);
  --surface-strong: rgba(255, 255, 255, 0.96);
  --border: rgba(15, 23, 42, 0.08);
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.10);
  --ink: #0f172a;
  --muted: rgba(15, 23, 42, 0.64);
  --quiet: rgba(15, 23, 42, 0.48);
  --accent: #2f6fed;
  --accent-soft: rgba(47, 111, 237, 0.12);
  --gold: #9a7b1f;
  --gold-soft: rgba(154, 123, 31, 0.13);
  --assistant: #eef4ff;
  --user: #f7efcf;
  --system: #f6f0d6;
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* { box-sizing: border-box; }

html { min-height: 100%; }

body {
  min-height: 100%;
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 560px at 12% 0%, rgba(47, 111, 237, 0.08), transparent 55%),
    radial-gradient(900px 560px at 90% 8%, rgba(154, 123, 31, 0.08), transparent 55%),
    linear-gradient(180deg, #fbfaf7 0%, var(--bg) 46%, #f4f0e7 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.36), transparent 72%);
}

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 36px 0 28px;
}

.hero-card {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  padding: clamp(22px, 4vw, 46px);
  backdrop-filter: blur(12px);
}

.hero-card::after {
  content: "";
  position: absolute;
  width: 310px;
  height: 310px;
  right: -120px;
  bottom: -140px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(47, 111, 237, 0.12), transparent 66%);
  pointer-events: none;
}


.brand-lockup {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.rk-logo {
  display: block;
  width: clamp(190px, 24vw, 310px);
  height: auto;
}

.presenting-line {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.product-name {
  margin: 0 0 12px;
  color: #572a82;
  font-size: clamp(3.6rem, 7.8vw, 7rem);
  line-height: 0.9;
  font-weight: 920;
  letter-spacing: -0.07em;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.92fr);
  gap: clamp(24px, 5vw, 56px);
  align-items: start;
  margin-top: clamp(26px, 5vw, 54px);
}

.preview-side {
  display: flex;
  flex-direction: column;
  gap: 0;
  align-items: flex-start;
  justify-self: end;
  width: min(100%, 470px);
  padding-top: 0;
}

h1,
h2,
p {
  margin-top: 0;
}


.tagline {
  max-width: 660px;
  margin-bottom: 20px;
  font-size: clamp(1.32rem, 2.5vw, 2.05rem);
  line-height: 1.12;
  letter-spacing: -0.045em;
  font-weight: 820;
}

.intro {
  max-width: 640px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.62;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 12px 16px;
  border: 1px solid rgba(47, 111, 237, 0.16);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--ink);
  font-weight: 800;
}

.lumo-preview {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.70);
  box-shadow: 0 16px 48px rgba(15, 23, 42, 0.08);
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 4px 2px 10px;
}

.preview-header strong,
.preview-header span {
  display: block;
}

.preview-header strong {
  font-size: 1.2rem;
  letter-spacing: -0.035em;
}

.preview-header span {
  margin-top: 2px;
  color: var(--quiet);
  font-size: 0.88rem;
  font-weight: 720;
}

.soft-dot {
  flex: 0 0 auto;
  width: 15px;
  height: 15px;
  border-radius: 999px;
  background: var(--gold);
  box-shadow: 0 0 0 9px var(--gold-soft);
}

.bubble {
  width: fit-content;
  max-width: 100%;
  border: 1px solid rgba(15, 23, 42, 0.06);
  border-radius: var(--radius-lg);
  padding: 15px 17px;
  line-height: 1.45;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.04);
}

.bubble.assistant,
.bubble.system {
  align-self: flex-start;
  background: var(--assistant);
}

.bubble.user {
  align-self: flex-end;
  background: var(--user);
}

.bubble.system {
  background: var(--system);
  color: rgba(15, 23, 42, 0.74);
}

.step-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(32px, 6vw, 58px);
}

.step-card {
  min-height: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.62);
  padding: 20px;
}

.step-number {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.step-card h2,
.trust-note h2 {
  margin-bottom: 8px;
  font-size: 1.08rem;
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.step-card p,
.trust-note p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.trust-note {
  margin-top: 16px;
  border: 1px solid rgba(154, 123, 31, 0.16);
  border-radius: var(--radius-lg);
  background: var(--gold-soft);
  padding: 20px;
}

.site-footer {
  display: flex;
  justify-content: center;
  gap: 10px 18px;
  flex-wrap: wrap;
  padding: 18px 10px 0;
  color: rgba(15, 23, 42, 0.56);
  font-size: 0.88rem;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .hero-grid,
  .step-cards {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    margin-top: 38px;
  }

  .preview-side {
    justify-self: start;
    width: 100%;
    padding-top: 0;
  }

  .lumo-preview {
    max-width: 560px;
  }
}

@media (max-width: 560px) {
  .rk-logo {
    width: min(250px, 72vw);
  }

  .shell {
    width: min(100% - 24px, 1120px);
    padding-top: 18px;
  }

  .hero-card {
    border-radius: 24px;
  }

  .product-name {
    font-size: clamp(3.2rem, 17vw, 5rem);
  }


  .tagline {
    font-size: 1.28rem;
  }

  .intro {
    font-size: 1rem;
  }

  .status-pill {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}