/* Мираи · единая дизайн-система v3 (2026-10-23) */
:root{--ink:#1b2340;--deep:#0f1d4a;--blue:#3a6cf0;--sky:#a9c4ff;--muted:#5b6687;--line:rgba(15,29,74,.12);--glass:rgba(255,255,255,.62);--glass-b:rgba(255,255,255,.75);
--serif:'Cormorant Garamond',Georgia,serif;--sans:Manrope,system-ui,sans-serif;--r:28px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:#f6f8fc;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:var(--blue)}
/* фон с глубиной: картинка-дымка, мягкий параллакс, виньетка и зерно */
.bg{position:fixed;inset:-6% -2%;z-index:-3;background:url(../img/bg-depth.webp) center/cover no-repeat;will-change:transform;transform:scale(1.06)}
.bg:after{content:"";position:absolute;inset:0;background:
 radial-gradient(ellipse at 50% 0%,rgba(255,255,255,.55),transparent 55%),
 linear-gradient(180deg,rgba(248,250,255,.35),rgba(238,243,252,.55) 60%,rgba(226,234,250,.75))}
.grain{position:fixed;inset:0;z-index:-2;pointer-events:none;opacity:.06;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
@media(max-width:700px){.bg{background-image:url(../img/bg-depth-m.webp)}}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px}
/* навигация */
nav{position:sticky;top:0;z-index:20;backdrop-filter:blur(18px) saturate(1.3);-webkit-backdrop-filter:blur(18px) saturate(1.3);background:rgba(248,250,255,.6);border-bottom:1px solid var(--line)}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px}
.logo{font-family:var(--serif);font-size:30px;letter-spacing:.02em;color:var(--deep);text-decoration:none;display:flex;align-items:center;gap:10px}
.logo i{width:7px;height:7px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 4px rgba(58,108,240,.15)}
nav ul{display:flex;gap:30px;list-style:none;margin:0;padding:0;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase}
nav ul a{color:var(--ink);text-decoration:none;opacity:.7;transition:.2s}nav ul a:hover{opacity:1;color:var(--blue)}
/* типографика */
.eyebrow{font-size:11.5px;letter-spacing:.32em;text-transform:uppercase;color:var(--blue);font-weight:600}
h1,h2,h3{font-family:var(--serif);font-weight:400;color:var(--deep)}
h1 em,h2 em,h3 em{font-style:italic;color:var(--blue)}
h2{font-size:clamp(40px,5vw,64px);line-height:1.02;margin:0;letter-spacing:-.01em}
p{line-height:1.75}
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--deep);color:#fff;text-decoration:none;padding:15px 30px;border-radius:999px;font-weight:500;font-size:15px;letter-spacing:.02em;transition:.3s;border:1px solid var(--deep)}
.btn:hover{background:var(--blue);border-color:var(--blue);transform:translateY(-2px);box-shadow:0 16px 34px -14px rgba(58,108,240,.6)}
.btn.ghost{background:rgba(255,255,255,.4);color:var(--deep);border-color:rgba(15,29,74,.25)}.btn.ghost:hover{color:#fff}
.btn.sm{padding:10px 20px;font-size:13.5px}
/* единый заголовок раздела: номер · подпись · линия */
section{padding:110px 0;position:relative}
section[id],div[id]{scroll-margin-top:90px}
.chapter{display:grid;grid-template-columns:200px 1fr;gap:40px;margin-bottom:56px;align-items:end}
.chapter .num{font-family:var(--serif);font-size:15px;color:var(--muted);letter-spacing:.08em;border-top:1px solid var(--deep);padding-top:14px}
.chapter .num b{display:block;font-size:13px;font-family:var(--sans);font-weight:600;letter-spacing:.3em;text-transform:uppercase;color:var(--blue);margin-top:6px}
.chapter .note{max-width:460px;color:var(--muted);font-size:15px;margin:16px 0 0}
/* разделитель точками */
.divider{display:flex;align-items:center;justify-content:center;gap:14px;max-width:1180px;margin:0 auto;padding:0 28px}
.divider:before,.divider:after{content:"";flex:1;height:1px;background:linear-gradient(90deg,transparent,var(--line) 30%,var(--line) 70%,transparent)}
.divider span{display:flex;gap:8px}.divider span i{width:4px;height:4px;border-radius:50%;background:var(--deep);opacity:.35}.divider span i:nth-child(2){width:6px;height:6px;background:var(--blue);opacity:.8;margin-top:-1px}
/* стеклянная панель */
.glass{background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-b);border-radius:var(--r);box-shadow:0 30px 60px -40px rgba(15,29,74,.35)}
footer{border-top:1px solid var(--line);padding:34px 0 46px;font-size:13px;color:var(--muted)}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer a{color:var(--muted);text-decoration:none}footer a:hover{color:var(--blue)}
.reveal{opacity:0;transform:translateY(26px);transition:opacity 1s cubic-bezier(.2,.7,.2,1),transform 1s cubic-bezier(.2,.7,.2,1)}.reveal.in{opacity:1;transform:none}
@media(max-width:900px){.chapter{grid-template-columns:1fr;gap:18px;margin-bottom:38px}section{padding:80px 0}
 nav .wrap{flex-wrap:wrap;height:auto;padding-top:12px;padding-bottom:10px;row-gap:8px}nav ul{order:3;width:100%;gap:20px;overflow-x:auto;white-space:nowrap;font-size:11.5px;padding-bottom:2px}}
@media(max-width:560px){.wrap,.divider{padding:0 20px}section{padding:64px 0}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}