/* One Habit — app-matched light theme (green + pink, rounded friendly) */
:root{
  --oh-green:#2E9E2E;
  --oh-green-deep:#1F7A22;
  --oh-green-mid:#3BA935;
  --oh-sage:#6FB56F;
  --oh-soft:#EAF7EA;
  --oh-pink:#F2588A;
  --oh-cyan:#26C6DA;
  --oh-ink:#17240F;
  --oh-body:#3F4C3F;
  --oh-muted:#6E7C6E;
  --oh-line:#E1EDE1;
  --oh-white:#fff;
  --oh-max:820px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--oh-white);color:var(--oh-body);
  font-family:"Poppins",system-ui,sans-serif;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}

/* top bar */
.oh-nav{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--oh-line)}
.oh-nav .in{max-width:var(--oh-max);margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.oh-mark{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--oh-ink);font-size:18px}
.oh-star{width:30px;height:30px;border-radius:9px;background:var(--oh-green);display:grid;place-items:center;flex:0 0 auto}
.oh-star svg{width:18px;height:18px;fill:#fff}
.oh-mark small{display:block;font-size:11px;font-weight:500;color:var(--oh-muted);line-height:1}
.oh-back{font-size:13px;color:var(--oh-green);font-weight:600;white-space:nowrap}
.oh-back:hover{color:var(--oh-green-deep)}

/* hero band */
.oh-hero{background:linear-gradient(160deg,var(--oh-green-deep),var(--oh-green-mid));color:#fff;text-align:center;padding:52px 24px 60px;position:relative;overflow:hidden}
.oh-hero::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:34px;background:var(--oh-white);border-radius:60% 60% 0 0/100% 100% 0 0}
.oh-hero .tag{font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;opacity:.85;font-weight:600;margin:0 0 12px}
.oh-hero h1{font-size:clamp(28px,6vw,42px);font-weight:800;margin:0;letter-spacing:-.01em}
.oh-hero .date{margin-top:14px;font-size:13px;opacity:.82;font-weight:500}

/* content */
.oh-doc{max-width:var(--oh-max);margin:0 auto;padding:8px 24px 80px}
.oh-card{background:#fff;border:1px solid var(--oh-line);border-radius:20px;padding:34px clamp(22px,4vw,44px);box-shadow:0 18px 50px -30px rgba(31,122,34,.4);margin-top:-10px}
.oh-quick{background:var(--oh-soft);border:1px solid #D3EBD3;border-left:4px solid var(--oh-green);border-radius:14px;padding:18px 20px;margin:0 0 28px}
.oh-quick strong{color:var(--oh-green-deep);font-weight:700}
.oh-doc h2{color:var(--oh-ink);font-size:20px;font-weight:700;margin:34px 0 10px;letter-spacing:-.01em}
.oh-doc h2:first-of-type{margin-top:6px}
.oh-doc p,.oh-doc li{color:var(--oh-body);font-size:15.5px}
.oh-doc p{margin:0 0 14px}
.oh-doc ul{padding-left:8px;margin:0 0 14px;list-style:none;display:grid;gap:9px}
.oh-doc ul li{position:relative;padding-left:28px}
.oh-doc ul li::before{content:"";position:absolute;left:2px;top:9px;width:14px;height:14px;border-radius:5px;background:var(--oh-green);box-shadow:inset 0 0 0 3px #fff, 0 0 0 1px var(--oh-green)}
.oh-doc strong{color:var(--oh-ink)}
.oh-doc a{color:var(--oh-green);font-weight:600}
.oh-doc a:hover{text-decoration:underline}
.oh-contact{background:var(--oh-soft);border-radius:14px;padding:18px 20px;margin:24px 0 4px}
.oh-contact strong{color:var(--oh-green-deep)}

/* cross links */
.oh-related{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}
.oh-related a{font-size:13.5px;font-weight:600;color:var(--oh-green-deep);border:1px solid var(--oh-line);background:#fff;border-radius:999px;padding:9px 16px}
.oh-related a:hover{border-color:var(--oh-green);background:var(--oh-soft)}
.oh-related a[aria-current]{background:var(--oh-green);color:#fff;border-color:var(--oh-green)}

/* footer */
.oh-foot{border-top:1px solid var(--oh-line);text-align:center;padding:30px 24px 46px;font-size:12.5px;color:var(--oh-muted);line-height:1.8}
.oh-foot a{color:var(--oh-green);font-weight:600}
.oh-foot .m{margin-bottom:8px}

@media(prefers-reduced-motion:reduce){*{transition:none!important}}