:root {
  --bg: #07081a;
  --text: #eceefc;
  --muted: #9ea3c9;
  --glass: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.1);
  --a1: #7c6cff;
  --a2: #3b9dff;
  --a3: #19c6b0;
  --grad: linear-gradient(120deg, var(--a1), var(--a2) 50%, var(--a3));
  --jp: "Noto Sans JP", "Hiragino Sans", system-ui, sans-serif;
  --en: "Outfit", var(--jp);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; color-scheme: dark; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.8 var(--jp); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; }
.muted { color: var(--muted); }
.grad { background: var(--grad); background-size: 200% auto; -webkit-background-clip: text; background-clip: text; color: transparent; animation: flow 6s linear infinite; }
@keyframes flow { to { background-position: 200% center; } }

/* aurora background */
.aurora { position: fixed; inset: 0; z-index: -1; overflow: hidden; }
.aurora span { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.45; animation: drift 20s ease-in-out infinite; }
.aurora span:nth-child(1) { width: 520px; height: 520px; background: var(--a1); top: -160px; left: -120px; }
.aurora span:nth-child(2) { width: 460px; height: 460px; background: var(--a2); top: 20%; right: -160px; animation-delay: -6s; }
.aurora span:nth-child(3) { width: 420px; height: 420px; background: var(--a3); bottom: -180px; left: 30%; animation-delay: -12s; opacity: 0.3; }
@keyframes drift { 50% { transform: translate(60px, 50px) scale(1.15); } }
.aurora::after { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px); background-size: 28px 28px; mask-image: linear-gradient(to bottom, #000 30%, transparent); }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; display: flex; justify-content: space-between; align-items: center; padding: 14px clamp(16px, 5vw, 64px); backdrop-filter: blur(16px); background: rgba(7, 8, 26, 0.6); border-bottom: 1px solid var(--border); }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 700 18px var(--en); }
.logo img { border-radius: 9px; }
.logo b { font-family: var(--jp); font-weight: 900; }
.nav nav { display: flex; gap: 22px; align-items: center; font-size: 14px; }
.nav nav a { text-decoration: none; color: var(--muted); transition: color 0.2s; }
.nav nav a:hover { color: var(--text); }
.nav .pill { color: var(--text) !important; padding: 7px 16px; border-radius: 999px; border: 1px solid var(--border); background: var(--glass); }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 26px; border-radius: 14px; font-weight: 700; text-decoration: none; transition: transform 0.2s, box-shadow 0.2s, background 0.2s; }
.btn.primary { background: var(--grad); background-size: 200% 200%; animation: shift 8s ease infinite; box-shadow: 0 14px 40px -12px rgba(124, 108, 255, 0.9); }
.btn.primary:hover { transform: translateY(-3px); box-shadow: 0 20px 50px -12px rgba(124, 108, 255, 1); }
.btn.ghost { border: 1px solid var(--border); background: var(--glass); }
.btn.ghost:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-2px); }
@keyframes shift { 0%, 100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }

/* hero */
.hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(32px, 5vw, 72px); align-items: center; max-width: 1200px; margin: 0 auto; padding: clamp(48px, 9vw, 120px) clamp(16px, 5vw, 64px); }
.eyebrow { display: inline-block; margin: 0 0 18px; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--glass); font: 600 13px var(--en); letter-spacing: 0.08em; color: #c8c6ff; }
.hero h1 { margin: 0; font-size: clamp(34px, 4.6vw, 58px); line-height: 1.25; font-weight: 900; letter-spacing: -0.01em; }
.hero h1 .nowrap { white-space: nowrap; }
.lead { color: var(--muted); font-size: 17px; max-width: 34em; margin: 24px 0 32px; }
.lead strong { color: var(--text); }
.cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* mock */
.mock { position: relative; height: 440px; animation: rise 0.9s cubic-bezier(0.2, 0.8, 0.2, 1); }
@keyframes rise { from { opacity: 0; transform: translateY(24px); } }
.mock-page, .mock-panel { position: absolute; border-radius: 18px; border: 1px solid var(--border); backdrop-filter: blur(20px); box-shadow: 0 40px 80px -30px rgba(0, 0, 0, 0.8); }
.mock-page { inset: 0 28% 8% 0; background: rgba(255, 255, 255, 0.04); overflow: hidden; }
.mock-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--border); font: 11px var(--en); color: var(--muted); }
.mock-bar i { width: 9px; height: 9px; border-radius: 50%; background: rgba(255, 255, 255, 0.18); }
.mock-bar span { margin-left: 8px; }
.mock-body { position: relative; padding: 22px; height: calc(100% - 38px); }
.line { height: 10px; border-radius: 6px; background: rgba(255, 255, 255, 0.09); margin-bottom: 12px; }
.w40 { width: 40%; } .w50 { width: 50%; } .w60 { width: 60%; } .w70 { width: 70%; } .w80 { width: 80%; } .w90 { width: 90%; }
.code-lines { margin-top: 26px; padding: 16px; border-radius: 12px; background: rgba(0, 0, 0, 0.35); }
.code-lines .line { background: rgba(124, 108, 255, 0.28); }
.mock-fab { position: absolute; left: 22px; bottom: 22px; border: 0; padding: 12px 18px; border-radius: 999px; background: var(--grad); color: #fff; font: 700 14px var(--jp); box-shadow: 0 10px 30px -8px rgba(124, 108, 255, 0.9); animation: bob 2.6s ease-in-out infinite; }
@keyframes bob { 50% { transform: translateY(-6px); } }
.mock-panel { right: 0; top: 12%; bottom: 0; width: 52%; padding: 16px; background: rgba(14, 16, 40, 0.85); display: flex; flex-direction: column; gap: 12px; }
.mock-steps { display: flex; gap: 6px; font-size: 11px; font-weight: 700; }
.mock-steps span { flex: 1; text-align: center; padding: 5px 0; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); }
.mock-steps .on { color: #fff; border-color: transparent; background: linear-gradient(120deg, rgba(124, 108, 255, 0.45), rgba(25, 198, 176, 0.4)); }
.mock-card { position: relative; padding: 12px 14px 12px 16px; border-radius: 12px; background: var(--glass); border: 1px solid var(--border); font-size: 12px; line-height: 1.7; overflow: hidden; }
.mock-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--grad); }
.mock-card p { margin: 6px 0 0; color: var(--muted); }
.caret { display: inline-block; width: 6px; height: 1em; background: var(--a2); vertical-align: text-bottom; margin-left: 2px; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* sections */
.section { max-width: 1100px; margin: 0 auto; padding: clamp(56px, 8vw, 100px) clamp(16px, 5vw, 64px); }
.section h2 { text-align: center; font-size: clamp(26px, 3.6vw, 38px); font-weight: 900; margin: 0 0 44px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { position: relative; padding: 28px; border-radius: 20px; background: var(--glass); border: 1px solid var(--border); transition: transform 0.3s, border-color 0.3s, background 0.3s; overflow: hidden; }
.card:hover { transform: translateY(-6px); border-color: rgba(124, 108, 255, 0.5); background: rgba(124, 108, 255, 0.07); }
.card .num { position: absolute; right: 18px; top: 4px; font: 800 72px var(--en); background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; opacity: 0.25; }
.card h3 { margin: 0 0 8px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.features { list-style: none; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.features li { padding: 18px 22px; border-radius: 16px; border: 1px solid var(--border); background: rgba(255, 255, 255, 0.025); color: var(--muted); font-size: 14.5px; }
.features b { display: block; color: var(--text); margin-bottom: 2px; font-size: 15.5px; }
kbd { padding: 1px 7px; border-radius: 6px; border: 1px solid var(--border); background: var(--glass); font: 12px var(--en); color: var(--text); }

.steps { list-style: none; padding: 0; margin: 0 auto; max-width: 760px; display: flex; flex-direction: column; gap: 16px; }
.steps li { display: flex; gap: 20px; padding: 22px 24px; border-radius: 18px; background: var(--glass); border: 1px solid var(--border); }
.steps li > span { flex: none; display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; background: var(--grad); font: 800 18px var(--en); box-shadow: 0 8px 24px -8px rgba(124, 108, 255, 0.9); }
.steps h3 { margin: 0 0 4px; font-size: 17px; }
.steps p { margin: 0; color: var(--muted); font-size: 15px; }
.steps a { color: #a9b8ff; }
code { font: 13px "SF Mono", Menlo, monospace; padding: 2px 7px; border-radius: 6px; background: rgba(124, 108, 255, 0.18); color: #d6d2ff; }
.note { max-width: 760px; margin: 28px auto 0; padding: 14px 18px; border-radius: 14px; border: 1px solid rgba(255, 190, 90, 0.3); background: rgba(255, 190, 90, 0.07); color: #f1d9a8; font-size: 14px; }

/* warning */
.cta-warn { margin: 18px 0 0; padding: 10px 14px; border-radius: 12px; border: 1px solid rgba(255, 99, 120, 0.45); background: rgba(255, 99, 120, 0.1); color: #ffc2cc; font-size: 14px; max-width: 34em; }
.cta-warn strong { color: #ff8fa1; }
.warn-section { padding-top: 0; }
.warn-box {
  position: relative; display: flex; gap: 22px; padding: 30px 32px; border-radius: 22px; overflow: hidden;
  border: 1px solid rgba(255, 99, 120, 0.5);
  background: linear-gradient(135deg, rgba(255, 70, 100, 0.16), rgba(255, 140, 60, 0.08));
  box-shadow: 0 20px 60px -24px rgba(255, 70, 100, 0.55);
}
.warn-box::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 6px; background: repeating-linear-gradient(-45deg, #ff5a76 0 14px, #2a0d18 14px 28px); }
.warn-icon { flex: none; font-size: 46px; line-height: 1; margin-top: 6px; animation: warnPulse 2.4s ease-in-out infinite; }
@keyframes warnPulse { 50% { transform: scale(1.12); } }
.warn-box h2 { text-align: left; margin: 0 0 10px; font-size: clamp(22px, 3vw, 30px); color: #ff8fa1; }
.warn-lead { margin: 0 0 12px; font-size: 16px; }
.warn-lead strong { color: #fff; background: linear-gradient(transparent 62%, rgba(255, 90, 118, 0.45) 62%); }
.warn-box ul { margin: 0 0 12px; padding-left: 1.2em; color: #f3c9d0; font-size: 14.5px; }
.warn-box li { margin: 4px 0; }
.warn-foot { margin: 0; font-size: 14px; color: var(--muted); }
.note { border-color: rgba(255, 99, 120, 0.4) !important; background: rgba(255, 99, 120, 0.08) !important; color: #ffc2cc !important; }
.note strong { color: #ff8fa1; }
@media (max-width: 880px) { .warn-box { flex-direction: column; gap: 10px; padding: 26px 22px; } }

.footer { text-align: center; padding: 40px 16px 56px; border-top: 1px solid var(--border); font-size: 13px; }
.footer p { margin: 4px 0; }

@media (max-width: 880px) {
  .hero { grid-template-columns: 1fr; }
  .mock { height: 380px; }
  .cards, .features { grid-template-columns: 1fr; }
  .nav nav a:not(.pill) { display: none; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }