/* Happy Steps — design system */
:root{
  --blue:#1A73E8; --blue-600:#1765CC; --blue-700:#174EA6; --blue-50:#E8F0FE; --blue-100:#D2E3FC;
  --green:#188038; --green-500:#1E8E3E; --green-50:#E6F4EA; --green-100:#CEEAD6;
  --yellow:#F9AB00; --yellow-50:#FEF7E0; --yellow-800:#B06000;
  --red:#D93025; --red-50:#FCE8E6;
  --ink:#202124; --ink-2:#3C4043; --muted:#5F6368; --line:#DADCE0; --line-2:#E8EAED;
  --surface:#F8F9FA; --white:#FFFFFF;
  --font:"Google Sans Flex","Google Sans","Roboto Flex",Roboto,"Noto Sans JP",system-ui,-apple-system,"Segoe UI",sans-serif;
  --text:"Roboto Flex",Roboto,"Noto Sans JP",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r-sm:12px; --r:20px; --r-lg:28px; --r-xl:36px;
  --shadow-1:0 1px 2px rgba(60,64,67,.3),0 1px 3px 1px rgba(60,64,67,.15);
  --shadow-2:0 1px 3px rgba(60,64,67,.3),0 4px 8px 3px rgba(60,64,67,.15);
  --shadow-soft:0 12px 40px -12px rgba(32,33,36,.18);
  --wrap:1200px;
}
*{box-sizing:border-box}
html{color:var(--ink);background:var(--white);font-family:var(--text);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;overflow-x:hidden}
img,svg,canvas{display:block;max-width:100%}
h1,h2,h3,h4{font-family:var(--font);margin:0;line-height:1.15;letter-spacing:-.015em;font-weight:500}
p{margin:0}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
code,pre{font-family:var(--mono)}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 32px}
.num{font-variant-numeric:tabular-nums}
.ja{font-family:var(--font);color:var(--muted);font-weight:400}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:6px}

/* ---------- header ---------- */
.appbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid transparent;transition:border-color .2s}
.appbar.scrolled{border-bottom-color:var(--line-2)}
.appbar .wrap{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-family:var(--font);font-weight:500;font-size:1.28rem;letter-spacing:-.01em}
.brand:hover{text-decoration:none}
.brand svg{width:32px;height:32px}
.nav{display:flex;gap:4px;margin-left:8px}
.nav a{color:var(--ink-2);font-family:var(--font);font-size:.95rem;font-weight:500;padding:8px 14px;border-radius:999px}
.nav a:hover{background:var(--surface);text-decoration:none}
.nav a[aria-current="page"]{color:var(--blue);background:var(--blue-50)}
.appbar .cta{margin-left:auto}
.menu-btn{display:none;margin-left:auto;background:none;border:0;padding:8px;border-radius:999px;cursor:pointer;color:var(--ink)}
.menu-btn:hover{background:var(--surface)}
@media (max-width:980px){
  .nav,.appbar .cta{display:none}
  .menu-btn{display:block}
  .appbar.open .nav{display:flex;flex-direction:column;position:absolute;top:68px;left:0;right:0;background:#fff;padding:12px 20px 20px;border-bottom:1px solid var(--line);margin:0;box-shadow:var(--shadow-soft)}
  .appbar.open .nav a{padding:12px 14px;font-size:1.05rem}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font);font-weight:500;font-size:.95rem;line-height:1;height:44px;padding:0 24px;border-radius:999px;border:0;cursor:pointer;text-decoration:none!important;transition:background .15s,box-shadow .15s,color .15s;white-space:nowrap}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-600);box-shadow:var(--shadow-1)}
.btn-tonal{background:var(--blue-50);color:var(--blue-700)}
.btn-tonal:hover{background:var(--blue-100)}
.btn-outline{background:#fff;color:var(--blue);box-shadow:inset 0 0 0 1px var(--line)}
.btn-outline:hover{background:var(--blue-50)}
.btn-text{background:none;color:var(--blue);padding:0 12px}
.btn-text:hover{background:var(--blue-50)}
.btn-lg{height:52px;padding:0 28px;font-size:1.02rem}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* ---------- type ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font);font-size:.85rem;font-weight:500;color:var(--blue-700);background:var(--blue-50);padding:6px 14px;border-radius:999px}
.eyebrow.green{color:var(--green);background:var(--green-50)}
.display{font-size:clamp(2.6rem,6vw,4.6rem);font-weight:400;letter-spacing:-.03em;line-height:1.04}
.display em{font-style:normal;background:linear-gradient(90deg,var(--blue),var(--green-500));-webkit-background-clip:text;background-clip:text;color:transparent}
.h1{font-size:clamp(2.2rem,4.6vw,3.5rem);font-weight:400;letter-spacing:-.025em;line-height:1.08}
.h2{font-size:clamp(1.8rem,3.4vw,2.6rem);font-weight:400;letter-spacing:-.02em}
.h3{font-size:1.3rem;font-weight:500}
.lead{font-size:clamp(1.08rem,1.6vw,1.3rem);color:var(--ink-2);line-height:1.55}
.body-muted{color:var(--muted)}
.section{padding:112px 0}
.section.tight{padding:80px 0}
.section.gray{background:var(--surface)}
.section-head{max-width:760px}
.section-head.center{margin:0 auto;text-align:center}
.section-head .h2{margin-top:16px}
.section-head .lead{margin-top:16px}
.section-head .ja{margin-top:8px;font-size:1rem}

/* ---------- page hero (sub pages) ---------- */
.page-hero{padding:96px 0 72px;background:radial-gradient(1200px 400px at 85% -10%,var(--blue-50),transparent 60%),radial-gradient(800px 300px at 0% 0%,var(--green-50),transparent 60%)}
.page-hero .h1{margin-top:18px;max-width:18ch}
.page-hero .lead{margin-top:20px;max-width:62ch}
.page-hero .ja{margin-top:10px;font-size:1.02rem}

/* ---------- cards ---------- */
.card{background:#fff;border:1px solid var(--line-2);border-radius:var(--r-lg);padding:32px}
.card.flat{background:var(--surface);border-color:transparent}
.card h3{font-size:1.2rem;font-weight:500}
.card p{color:var(--muted);margin-top:10px}
.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:980px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}.wrap{padding:0 20px}.section{padding:80px 0}.card{padding:24px}}
.icon-chip{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:var(--blue-50);color:var(--blue)}
.icon-chip svg{width:24px;height:24px}
.icon-chip.green{background:var(--green-50);color:var(--green)}
.icon-chip.yellow{background:var(--yellow-50);color:var(--yellow-800)}
.icon-chip.red{background:var(--red-50);color:var(--red)}
.card .icon-chip{margin-bottom:20px}

/* ---------- stats ---------- */
.stat{padding:32px;border-radius:var(--r-lg);background:#fff;border:1px solid var(--line-2)}
.stat b{display:block;font-family:var(--font);font-size:clamp(2.4rem,4vw,3.4rem);font-weight:400;letter-spacing:-.03em;line-height:1;color:var(--ink)}
.stat .what{margin-top:14px;font-size:1.02rem;color:var(--ink-2)}
.stat .src{margin-top:14px;font-size:.8rem;color:var(--muted)}
.stat.blue b{color:var(--blue)} .stat.green b{color:var(--green)} .stat.red b{color:var(--red)}

/* ---------- steps ---------- */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:56px}
.step{position:relative;padding:28px;border-radius:var(--r-lg);background:#fff;border:1px solid var(--line-2)}
.step .n{font-family:var(--font);font-size:.82rem;font-weight:500;color:var(--blue);letter-spacing:.06em}
.step h3{margin-top:10px;font-size:1.15rem}
.step p{margin-top:8px;color:var(--muted);font-size:.95rem}
.step .ja{display:block;margin-top:8px;font-size:.86rem}
@media (max-width:980px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.steps{grid-template-columns:1fr}}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.split.wide-l{grid-template-columns:1.1fr .9fr}
@media (max-width:980px){.split,.split.wide-l{grid-template-columns:1fr;gap:40px}}
.checks{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:14px}
.checks li{display:grid;grid-template-columns:24px 1fr;gap:12px;color:var(--ink-2)}
.checks li::before{content:"";width:22px;height:22px;border-radius:50%;background:var(--green-50) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23188038' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12l4 4 8-8'/%3E%3C/svg%3E") center/14px no-repeat;margin-top:2px}
.checks b{color:var(--ink);font-weight:500}

/* ---------- table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line-2);border-radius:var(--r);background:#fff}
table.t{width:100%;border-collapse:collapse;font-size:.95rem}
table.t th,table.t td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line-2);vertical-align:top}
table.t th{font-family:var(--font);font-weight:500;color:var(--muted);font-size:.85rem;background:var(--surface)}
table.t tr:last-child td{border-bottom:0}
table.t td.us{background:var(--blue-50);font-weight:500;color:var(--blue-700)}
table.t th.us{background:var(--blue-100);color:var(--blue-700)}
.yes{color:var(--green);font-weight:500} .no{color:var(--red)} .meh{color:var(--yellow-800)}

/* ---------- code ---------- */
pre.code{background:#1F2023;color:#E8EAED;border-radius:var(--r);padding:24px;overflow:auto;font-size:.82rem;line-height:1.6;margin:0}
pre.code .k{color:#8AB4F8} pre.code .s{color:#81C995} pre.code .n{color:#FDD663} pre.code .c{color:#9AA0A6}
.code-card{border-radius:var(--r-lg);overflow:hidden;background:#1F2023}
.code-card .bar{display:flex;align-items:center;gap:8px;padding:12px 18px;color:#9AA0A6;font-size:.8rem;font-family:var(--mono);border-bottom:1px solid #303134}
.code-card .bar i{width:10px;height:10px;border-radius:50%;background:#5F6368;display:inline-block}
.code-card pre.code{border-radius:0}

/* ---------- CTA band ---------- */
.cta-band{border-radius:var(--r-xl);padding:72px 56px;background:linear-gradient(135deg,var(--blue) 0%,#1557B0 55%,#0F7B4A 120%);color:#fff;display:grid;grid-template-columns:1.4fr auto;gap:32px;align-items:center;position:relative;overflow:hidden}
.cta-band::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.08)}
.cta-band h2{font-size:clamp(1.8rem,3.4vw,2.6rem);font-weight:400;letter-spacing:-.02em;color:#fff}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.85);font-size:1.08rem}
.cta-band .btns{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}
.cta-band .btn-primary{background:#fff;color:var(--blue-700)}
.cta-band .btn-primary:hover{background:var(--blue-50)}
.cta-band .btn-outline{background:transparent;color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.5)}
.cta-band .btn-outline:hover{background:rgba(255,255,255,.1)}
@media (max-width:860px){.cta-band{grid-template-columns:1fr;padding:48px 28px}}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--line-2);margin-top:112px;padding:56px 0 40px;background:#fff}
.footer .cols{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:40px}
.footer h4{font-size:.85rem;font-weight:500;color:var(--ink);margin-bottom:14px}
.footer ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.footer ul a{color:var(--muted);font-size:.92rem}
.footer .about{color:var(--muted);font-size:.92rem;max-width:36ch;margin-top:14px}
.footer .legal{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:48px;padding-top:24px;border-top:1px solid var(--line-2);font-size:.82rem;color:var(--muted)}
@media (max-width:860px){.footer .cols{grid-template-columns:1fr 1fr}}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- misc ---------- */
.pill{display:inline-flex;align-items:center;gap:6px;font-size:.76rem;font-weight:500;padding:3px 10px;border-radius:999px;font-family:var(--font)}
.pill.blue{background:var(--blue-50);color:var(--blue-700)}
.pill.green{background:var(--green-50);color:var(--green)}
.pill.yellow{background:var(--yellow-50);color:var(--yellow-800)}
.pill.red{background:var(--red-50);color:var(--red)}
.pill.gray{background:var(--surface);color:var(--muted)}
.note{border-radius:var(--r);padding:20px 24px;background:var(--yellow-50);color:var(--ink-2);font-size:.95rem}
.note b{color:var(--ink);font-weight:500}
.divider{height:1px;background:var(--line-2);margin:0}
.kicker{font-family:var(--font);font-size:.85rem;color:var(--blue);font-weight:500;letter-spacing:.04em}

/* ---------- landing hero ---------- */
.hero{padding:72px 0 96px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-200px -200px auto auto;width:900px;height:700px;background:radial-gradient(closest-side,var(--blue-50),transparent);z-index:-1}
.hero::after{content:"";position:absolute;left:-300px;top:200px;width:700px;height:600px;background:radial-gradient(closest-side,var(--green-50),transparent);z-index:-1}
.hero .split{grid-template-columns:1.05fr .95fr}
.hero .display{margin-top:22px}
.hero .lead{margin-top:24px;max-width:34ch}
.hero .ja{margin-top:12px;font-size:1.02rem;max-width:40ch}
.hero .btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:36px}
.hero .meta{display:flex;gap:28px;flex-wrap:wrap;margin-top:40px;color:var(--muted);font-size:.9rem}
.hero .meta span{display:flex;align-items:center;gap:8px}
.hero .meta svg{width:18px;height:18px;color:var(--green)}
.hv{position:relative;display:grid;gap:16px}
.hv-card{background:#fff;border:1px solid var(--line-2);border-radius:var(--r-lg);box-shadow:var(--shadow-soft);padding:20px 22px}
.hv-head{display:flex;align-items:center;gap:10px;font-family:var(--font);font-size:.9rem;color:var(--ink-2)}
.live-dot{width:8px;height:8px;border-radius:50%;background:var(--red);box-shadow:0 0 0 4px var(--red-50);animation:pulse 1.6s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 7px rgba(217,48,37,.08)}}
@media (prefers-reduced-motion:reduce){.live-dot{animation:none}}
.hv-head .right{margin-left:auto;color:var(--muted);font-size:.8rem}
#heroWave{width:100%;height:150px;margin-top:12px}
.hv-foot{display:flex;gap:18px;margin-top:10px;font-size:.85rem;color:var(--muted)}
.hv-foot b{color:var(--ink);font-weight:500}
.hv-json{display:flex;align-items:center;gap:14px;margin-left:36px;background:#1F2023;color:#E8EAED;border-radius:16px;padding:14px 18px;font-family:var(--mono);font-size:.78rem;box-shadow:var(--shadow-soft)}
.hv-json code{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hv-json .k{color:#8AB4F8}.hv-json .n{color:#FDD663}.hv-json .s{color:#81C995}
.hv-json small{color:#9AA0A6;font-family:var(--font);white-space:nowrap}
.hv-note{margin-left:72px;display:grid;grid-template-columns:40px 1fr;gap:14px;align-items:start}
.hv-note .app{width:40px;height:40px}
.hv-note .top{display:flex;gap:8px;font-size:.8rem;color:var(--muted)}
.hv-note .top b{color:var(--ink-2);font-weight:500}
.hv-note h4{font-size:1.05rem;font-weight:500;margin-top:4px;line-height:1.4}
.hv-note p{font-size:.88rem;color:var(--muted);margin-top:4px}
@media (max-width:980px){.hero .split{grid-template-columns:1fr}.hv-json,.hv-note{margin-left:0}}

/* logos strip */
.trust{display:flex;flex-wrap:wrap;gap:12px 40px;justify-content:center;align-items:center;color:var(--muted);font-family:var(--font);font-size:.95rem}
.trust b{color:var(--ink);font-weight:500}
.trust .sep{width:4px;height:4px;border-radius:50%;background:var(--line)}

/* feature big card */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:0;border-radius:var(--r-xl);overflow:hidden;background:var(--surface)}
.feature .txt{padding:56px}
.feature .vis{background:linear-gradient(160deg,var(--blue-50),var(--green-50));padding:40px;display:flex;align-items:center;justify-content:center}
@media (max-width:860px){.feature{grid-template-columns:1fr}.feature .txt{padding:32px}}
.phone{width:300px;max-width:100%;background:#fff;border-radius:36px;box-shadow:var(--shadow-2);padding:18px 16px 22px;border:8px solid #202124}
.phone .sb{display:flex;justify-content:space-between;font-size:.72rem;color:var(--muted);padding:0 6px 10px}
.msg{background:var(--surface);border-radius:20px;padding:14px 16px;margin-top:10px}
.msg .who{font-size:.72rem;color:var(--muted);display:flex;gap:6px;align-items:center}
.msg h5{font-family:var(--font);font-size:.95rem;font-weight:500;margin:6px 0 0;line-height:1.4}
.msg p{font-size:.8rem;color:var(--muted);margin-top:4px}
.msg.good{background:var(--green-50)} .msg.watch{background:var(--yellow-50)} .msg.alert{background:var(--red-50)}

/* metric tiles */
.metric{padding:28px;border-radius:var(--r-lg);background:#fff;border:1px solid var(--line-2)}
.metric b{display:block;font-family:var(--font);font-size:2.6rem;font-weight:400;letter-spacing:-.03em;line-height:1;color:var(--blue)}
.metric span{display:block;margin-top:12px;color:var(--ink-2)}
.metric small{display:block;margin-top:6px;color:var(--muted);font-size:.82rem}

/* roadmap */
.road{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.road .card{position:relative}
.road .when{font-family:var(--font);font-size:.82rem;color:var(--blue);font-weight:500}
.road h3{margin-top:8px}
.road ul{margin:14px 0 0;padding-left:18px;color:var(--muted);font-size:.95rem;display:grid;gap:6px}
@media (max-width:860px){.road{grid-template-columns:1fr}}

/* architecture figure */
.figure{border-radius:var(--r-xl);background:var(--surface);padding:40px;overflow-x:auto}
.figure svg{min-width:880px;width:100%;height:auto}
.figcap{margin-top:14px;font-size:.88rem;color:var(--muted);text-align:center}

/* stage rows (how it works) */
.stage{display:grid;grid-template-columns:120px 1fr 1fr;gap:48px;padding:64px 0;border-top:1px solid var(--line-2);align-items:start}
.stage:first-of-type{border-top:0}
.stage .no{font-family:var(--font);font-size:3.2rem;font-weight:300;color:var(--blue);line-height:1}
.stage h3{font-size:1.6rem;font-weight:400;letter-spacing:-.015em}
.stage .ja{display:block;margin-top:6px;font-size:.95rem}
.stage p{margin-top:14px;color:var(--ink-2)}
.stage .where{margin-top:16px}
@media (max-width:980px){.stage{grid-template-columns:1fr;gap:20px;padding:48px 0}}
[hidden]{display:none!important}
.section.gray .feature{background:#fff;border:1px solid var(--line-2)}
.trust{gap:10px 28px;font-size:.92rem}
@media (max-width:1100px){.trust .sep{display:none}}
.split > *,.grid > *{min-width:0}
.hv-json code{min-width:0}
@media (max-width:640px){.hero .btns .btn{flex:1 1 auto}.hero .meta{gap:12px 20px}}
.hv-head{flex-wrap:wrap}
@media (max-width:640px){.hv-head .right{display:none}.hv-card{padding:16px}}
.hv > *{min-width:0} #heroWave{max-width:100%}
.feature > *{min-width:0}