/*
  Clean, modern landing page — HTML + CSS only
*/

:root {
  --bg: #0b1220;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-2: rgba(255, 255, 255, 0.09);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.68);
  --stroke: rgba(255, 255, 255, 0.12);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --radius: 16px;
  --radius-lg: 22px;
  --max: 1080px;
  --accent: #7c5cff;
  --accent-2: #34d399;
}

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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(1000px 600px at 15% 10%, rgba(124, 92, 255, 0.28), transparent 55%),
    radial-gradient(900px 520px at 85% 15%, rgba(52, 211, 153, 0.18), transparent 55%),
    radial-gradient(900px 700px at 55% 90%, rgba(99, 102, 241, 0.14), transparent 60%),
    var(--bg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", Arial, sans-serif;
  line-height: 1.6;
  letter-spacing: 0.01em;
}

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

.container {
  width: min(var(--max), calc(100% - 48px));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid var(--stroke);
  transform: translateY(-140%);
  transition: transform 160ms ease;
  z-index: 999;
}

.skip-link:focus {
  transform: translateY(0);
  outline: none;
  box-shadow: 0 0 0 4px rgba(124, 92, 255, 0.25);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(11, 18, 32, 0.55);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 12px;
}

.brand:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(124, 92, 255, 0.25);
}

.brand-mark {
  width: 20px;
  height: 20px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 30px rgba(124, 92, 255, 0.3);
}

.brand-name {
  font-weight: 650;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  gap: 14px;
}

.nav-link {
  color: var(--muted);
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.08);
}

.nav-link:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(124, 92, 255, 0.25);
}

.hero {
  padding: 72px 0 44px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 34px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 16px;
}

.hero-title {
  margin: 0 0 14px;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  margin: 0 0 22px;
  color: var(--muted);
  max-width: 58ch;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 16px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-weight: 650;
  letter-spacing: 0.01em;
  transition: transform 120ms ease, background 160ms ease, border-color 160ms ease;
  user-select: none;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.09);
}

.btn:active {
  transform: translateY(0);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(124, 92, 255, 0.25);
}

.btn-primary {
  border-color: rgba(124, 92, 255, 0.42);
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.95), rgba(52, 211, 153, 0.55));
  box-shadow: 0 18px 50px rgba(124, 92, 255, 0.22);
}

.btn-primary:hover {
  background: linear-gradient(135deg, rgba(124, 92, 255, 1), rgba(52, 211, 153, 0.65));
  border-color: rgba(124, 92, 255, 0.55);
}

.btn-ghost {
  background: transparent;
}

.hero-points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
}

.hero-points li {
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
}

.hero-visual {
  display: grid;
  place-items: center;
}

.glass-card {
  width: min(420px, 100%);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
  padding: 18px;
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: "";
  position: absolute;
  inset: -30%;
  background: radial-gradient(circle at 30% 25%, rgba(124, 92, 255, 0.35), transparent 45%),
    radial-gradient(circle at 70% 55%, rgba(52, 211, 153, 0.22), transparent 45%);
  filter: blur(18px);
}

.glass-row,
.glass-block,
.glass-lines {
  position: relative;
  z-index: 1;
}

.glass-row {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  opacity: 0.9;
}

.dot-a {
  background: rgba(248, 113, 113, 0.9);
}

.dot-b {
  background: rgba(251, 191, 36, 0.9);
}

.dot-c {
  background: rgba(52, 211, 153, 0.9);
}

.glass-block {
  height: 160px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 14px;
}

.glass-lines span {
  display: block;
  height: 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 10px;
}

.glass-lines span:nth-child(1) {
  width: 88%;
}

.glass-lines span:nth-child(2) {
  width: 72%;
}

.glass-lines span:nth-child(3) {
  width: 60%;
  margin-bottom: 0;
}

.section {
  padding: 44px 0;
}

.section-head {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.section-title {
  margin: 0;
  font-size: 26px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  margin: 0;
  color: var(--muted);
  max-width: 70ch;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card {
  padding: 18px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
}

.card-title {
  margin: 0 0 8px;
  font-size: 18px;
}

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

.cta {
  padding: 46px 0 58px;
}

.cta-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 16px;
  align-items: center;
  padding: 22px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.18), rgba(52, 211, 153, 0.1));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
}

.cta-title {
  margin: 0 0 8px;
  font-size: 24px;
  letter-spacing: -0.01em;
}

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

.cta-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.site-footer {
  padding: 26px 0 34px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(11, 18, 32, 0.35);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.muted {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 920px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-visual {
    order: -1;
  }
  .cards {
    grid-template-columns: 1fr;
  }
  .cta-inner {
    grid-template-columns: 1fr;
  }
  .cta-actions {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}