*{box-sizing:border-box}
:root{
--bg:#f6f7f9;--card:#fff;--line:#e6e8ee;--line2:#eef0f4;
--ink:#0f172a;--txt:#334155;--mut:#64748b;
--note-bg:#f8f9fb;--sel-bg:#e2e8f0;--focus:#94a3b8;
--shadow:0 12px 34px #0f172a10;--top-bg:rgba(255,255,255,.88);
--body-font:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
--head-font:"Space Grotesk",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:64px}
body{margin:0;font-family:var(--body-font);font-size:clamp(.9rem,.86rem+.18vw,.96rem);line-height:1.7;background:var(--bg);color:var(--txt);min-height:100vh;min-height:100dvh;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
::selection{background:var(--sel-bg);color:var(--ink)}
a{color:var(--ink);text-decoration:underline;text-decoration-color:#cbd5e1;text-underline-offset:2px;transition:text-decoration-color .15s,color .15s}
a:hover{text-decoration-color:var(--ink)}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:6px}
.read-progress{position:fixed;top:0;left:0;height:2px;width:0;z-index:40;background:var(--ink);transition:width .1s linear;pointer-events:none}
.top{position:sticky;top:0;z-index:30;display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;padding:8px clamp(12px,3vw,28px);background:var(--top-bg);backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);border-bottom:1px solid var(--line)}
.top-back{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:999px;color:var(--mut);background:transparent;text-decoration:none;transition:color .15s,background .15s}
.top-back:hover{color:var(--ink);background:var(--line2);text-decoration:none}
.top-back svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.top-link{font-family:var(--head-font);font-size:.8rem;font-weight:700;color:var(--mut);text-decoration:none;padding:8px 4px;border-radius:8px;transition:color .15s}
.top-link:hover{color:var(--ink);text-decoration:none}
main{width:100%;max-width:720px;margin:0 auto;padding:20px 16px 36px}
article{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px 20px;box-shadow:var(--shadow);min-width:0}
h1,h2,h3{font-family:var(--head-font);color:var(--ink);letter-spacing:-.3px}
h1{margin:0 0 10px;font-size:clamp(1.3rem,1.15rem+.7vw,1.55rem);line-height:1.25;font-weight:700}
h2{margin:1.9em 0 .65em;font-size:clamp(1.02rem,.98rem+.25vw,1.12rem);line-height:1.35;font-weight:700;padding-bottom:.4em;border-bottom:1px solid var(--line)}
h3{margin:1.4em 0 .5em;font-size:clamp(.95rem,.93rem+.1vw,1rem);font-weight:700;color:var(--ink)}
p{margin:0 0 1.05em;text-wrap:pretty;overflow-wrap:anywhere}
ul,ol{margin:0 0 1.15em;padding-left:1.35em;min-width:0}
li{margin:.38em 0;overflow-wrap:anywhere}
li::marker{color:var(--mut)}
strong{color:var(--ink);font-weight:700}
.meta{display:block;margin:0 0 1.1em;font-size:.72rem;line-height:1.5;color:var(--mut);font-weight:500;letter-spacing:.2px}
.lead{font-size:clamp(.98rem,.95rem+.15vw,1.04rem);color:var(--txt)}
.note{margin:1.3em 0 0;padding:15px 17px;border:1px solid var(--line);border-radius:13px;background:var(--note-bg);color:var(--txt);font-size:.9rem;line-height:1.68}
.footer{margin-top:2.1em;padding-top:1.15em;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:.45em}
.footer-info{margin:0;font-size:.78rem;line-height:1.6;color:var(--mut);text-align:left}
.footer-info a{color:var(--ink)}
.footer-copyright{margin:.7em 0 0;padding-top:.9em;border-top:1px solid var(--line2);font-size:.8rem;line-height:1.5;color:var(--txt);text-align:center;font-weight:500}
.privacy-mark{display:none}
@media (min-width:641px){
main{max-width:760px;padding:30px 22px 48px}
article{padding:34px 32px;border-radius:20px}
}
@media (min-width:960px){
main{max-width:820px;padding:44px 24px 64px}
article{padding:46px 50px;border-radius:22px}
}
@media (max-width:430px){
.top{padding:8px 10px}
.top-link{font-size:.76rem;padding:7px 3px}
main{padding:14px 12px 28px}
article{padding:20px 16px;border-radius:14px}
body{font-size:.82rem}
h1{font-size:1.12rem}
h2{font-size:.94rem}
h3{font-size:.86rem}
.meta{font-size:.66rem}
.lead{font-size:.86rem}
.note{padding:14px 15px;font-size:.82rem}
}
@media (prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
.read-progress,.top-back,.top-link,a{transition:none}
}
@media print{
.read-progress,.top{display:none!important}
html{scroll-padding-top:0}
body{background:#fff;color:#000;font-size:10.5pt;line-height:1.5}
main{max-width:none;padding:0}
article{border:0;box-shadow:none;border-radius:0;padding:0}
a{color:#000;text-decoration:none}
h2{border-bottom-color:#ddd;break-after:avoid}
.footer-info,.footer-copyright{color:#222}
li,.note{break-inside:avoid}
}