:root{--bg:#050610;--bg2:#0c1020;--card:rgba(15,19,38,.78);--line:rgba(196,210,255,.12);--text:#f4f6ff;--muted:#9ea9c4;--accent:#8b78ff;--accent2:#5fe1ff;--accent3:#ffb66b;--max:1180px;--radius:24px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(circle at 18% 0%,#17133a 0,transparent 30%),radial-gradient(circle at 88% 8%,#082d39 0,transparent 26%),var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden}
body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.22;background-image:linear-gradient(rgba(128,150,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(128,150,255,.05) 1px,transparent 1px);background-size:72px 72px}
body:after{content:"";position:fixed;width:36vw;height:36vw;right:-12vw;top:18vh;border-radius:50%;pointer-events:none;background:radial-gradient(circle,rgba(95,225,255,.06),transparent 68%);filter:blur(10px)}
.container{width:min(var(--max),calc(100% - 40px));margin:auto}
.topbar{position:sticky;top:0;z-index:20;backdrop-filter:blur(18px);background:rgba(4,6,16,.76);border-bottom:1px solid var(--line)}
.nav{min-height:76px;display:flex;align-items:center;justify-content:flex-start;gap:14px;position:relative}
.brand{display:flex;align-items:center;gap:12px;font-weight:850;letter-spacing:.07em}
.brand-mark{width:38px;height:38px;border-radius:50%;position:relative;background:radial-gradient(circle at 36% 34%,#ffffff 0 9%,#94ecff 15%,#7366ff 45%,#24165f 72%);box-shadow:0 0 30px rgba(120,110,255,.44)}
.brand-mark:after{content:"";position:absolute;inset:7px;border:1px solid rgba(255,255,255,.32);border-radius:50%;transform:rotate(24deg) scaleX(1.5)}
.links{display:flex;gap:19px;color:var(--muted);font-size:.91rem;margin-left:auto;min-width:0}.links a{white-space:nowrap}.links a:hover,.links a.active{color:#fff}
.menu{display:none;background:none;border:1px solid var(--line);color:#fff;border-radius:12px;padding:9px 11px}
.hero{padding:86px 0 56px}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:50px}
.eyebrow{text-transform:uppercase;letter-spacing:.16em;color:var(--accent2);font-size:.72rem;font-weight:800}
.hero h1{font-size:clamp(3rem,6.4vw,6rem);line-height:.95;margin:16px 0 24px;letter-spacing:-.06em;max-width:760px}
.hero p{font-size:1.12rem;color:var(--muted);max-width:690px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{padding:13px 18px;border-radius:14px;border:1px solid var(--line);background:#10162b;color:#fff;font-weight:700;cursor:pointer;transition:.2s}.btn.primary{background:linear-gradient(135deg,var(--accent),#4a96ff);box-shadow:0 14px 35px rgba(100,88,255,.26)}.btn:hover{transform:translateY(-2px)}
.spacetime-visual{position:relative;min-height:430px;display:grid;place-items:center;isolation:isolate}
.grid-plane{position:absolute;width:470px;height:330px;transform:perspective(700px) rotateX(58deg) rotateZ(-10deg);background-image:linear-gradient(rgba(110,220,255,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(110,220,255,.16) 1px,transparent 1px);background-size:36px 36px;border-radius:48% 52% 35% 65%;filter:drop-shadow(0 20px 45px rgba(0,0,0,.35));clip-path:ellipse(46% 40% at 50% 50%)}
.well{position:absolute;width:150px;height:150px;border-radius:50%;background:radial-gradient(circle,#050610 0 18%,rgba(65,32,165,.38) 34%,rgba(95,225,255,.12) 57%,transparent 70%);box-shadow:0 0 80px rgba(86,72,255,.32);transform:translateY(10px)}
.light-orbit{position:absolute;width:260px;height:104px;border:1px solid rgba(255,191,114,.72);border-radius:50%;transform:rotate(-22deg);box-shadow:0 0 35px rgba(255,182,107,.22)}
.clock-node{width:88px;height:88px;border-radius:50%;display:grid;place-items:center;border:1px solid rgba(255,255,255,.24);background:rgba(6,10,23,.88);box-shadow:0 0 50px rgba(95,225,255,.18);font-size:2rem;font-family:Georgia,serif;z-index:2}.clock-node span{transform:translateY(-2px)}
.axis{position:absolute;background:linear-gradient(90deg,transparent,rgba(255,255,255,.14),transparent)}.axis-x{height:1px;width:84%;top:60%}.axis-y{height:80%;width:1px;left:50%;background:linear-gradient(180deg,transparent,rgba(255,255,255,.12),transparent)}
.section{padding:74px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px}.section h2{font-size:clamp(2rem,4vw,3.5rem);margin:0;letter-spacing:-.04em}.muted{color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.card{background:linear-gradient(180deg,rgba(22,28,54,.82),rgba(10,14,29,.84));border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 20px 60px rgba(0,0,0,.22);transition:.25s}.card:hover{transform:translateY(-5px);border-color:rgba(95,225,255,.28)}
.concept-card{min-height:330px;display:flex;flex-direction:column}.concept-card h3{margin:17px 0 7px}.concept-card p{min-height:72px}.concept-glyph{height:155px;border-radius:18px;display:grid;place-items:center;background:radial-gradient(circle at 50% 45%,rgba(120,105,255,.16),transparent 60%),#080c1b;border:1px solid rgba(150,168,255,.08);font-family:Georgia,serif;font-size:3rem;position:relative;overflow:hidden}
.concept-glyph:before,.concept-visual:before{content:"";position:absolute;width:180%;height:1px;top:50%;left:-40%;background:linear-gradient(90deg,transparent,rgba(95,225,255,.3),transparent);transform:rotate(-18deg)}
.tag{display:inline-flex;align-items:center;padding:7px 10px;border:1px solid var(--line);border-radius:999px;color:#cbd4f0;font-size:.78rem}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.stat{padding:24px;border-radius:18px;background:rgba(17,25,52,.64);border:1px solid var(--line)}.stat strong{display:block;font-size:2.2rem;font-family:Georgia,serif;color:#fff}
.banner{padding:30px;border-radius:28px;background:linear-gradient(120deg,rgba(139,120,255,.17),rgba(95,225,255,.08));border:1px solid rgba(139,120,255,.25)}
.page-head{padding:72px 0 30px}.page-head h1{font-size:clamp(2.6rem,5vw,4.7rem);letter-spacing:-.05em;margin:14px 0}
.detail{display:grid;grid-template-columns:.85fr 1.15fr;gap:28px;align-items:start}
.large-planet{min-height:420px;border-radius:30px;display:flex;flex-direction:column;gap:15px;justify-content:center;padding:22px;background:radial-gradient(circle at center,rgba(123,92,255,.12),transparent 55%),#091126;border:1px solid var(--line)}
.detail-visual{width:100%;display:grid;place-items:center}.concept-visual{position:relative;overflow:hidden;border-radius:25px;background:#080b18;border:1px solid rgba(150,168,255,.08)}.concept-visual.large{width:100%;height:360px;display:grid;place-items:center}.concept-visual.mini{width:120px;height:76px;display:grid;place-items:center;border-radius:16px;flex:0 0 auto}.concept-visual.small{height:155px;display:grid;place-items:center;margin-bottom:15px}.concept-visual span{font-size:3rem;font-family:Georgia,serif;position:relative;z-index:2}.concept-visual.large .formula{position:relative;z-index:3;max-width:80%;text-align:center;font-family:Georgia,serif;font-size:1.2rem;color:#e9edff}.curve{position:absolute;width:80%;height:65%;border-radius:50%;border:1px solid rgba(95,225,255,.28);transform:skewX(-22deg) rotate(-9deg);box-shadow:0 0 50px rgba(95,225,255,.08)}.particle{position:absolute;width:18px;height:18px;border-radius:50%;background:#fff;box-shadow:0 0 24px rgba(255,255,255,.7);left:67%;top:31%}.concept-visual.time .particle{left:35%;top:60%}.concept-visual.gravity .curve{width:62%;height:62%;border-color:rgba(255,178,106,.38);box-shadow:0 0 60px rgba(255,178,106,.08)}.concept-visual.waves .curve{border-radius:40% 60% 45% 55%;transform:rotate(10deg);border-style:dashed}.concept-visual.light .curve{border-color:rgba(255,255,255,.45);transform:rotate(-25deg) scaleX(1.15)}
.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:20px}.fact{padding:18px;border-radius:16px;background:#0b1227;border:1px solid var(--line)}.fact span{display:block;color:var(--muted);font-size:.82rem}.fact strong{display:block;margin-top:5px}
.timeline{position:relative;padding-left:28px}.timeline:before{content:"";position:absolute;left:7px;top:0;bottom:0;width:1px;background:var(--line)}.event{position:relative;padding:0 0 30px}.event:before{content:"";position:absolute;left:-25px;top:7px;width:9px;height:9px;border-radius:50%;background:var(--accent2);box-shadow:0 0 18px var(--accent2)}.event h3{margin:0 0 6px}
.catalog-toolbar{display:grid;grid-template-columns:minmax(220px,1fr) auto auto;gap:12px;align-items:center;margin-bottom:22px}.search-box{display:flex;align-items:center;gap:10px;padding:12px 15px;border:1px solid var(--line);border-radius:15px;background:rgba(10,16,34,.8)}.search-box span{color:var(--accent2);font-size:1.1rem}.search-box input{width:100%;background:transparent;border:0;outline:0;color:#fff;font:inherit}.search-box input::placeholder{color:#6f7b9f}.filters{display:flex;gap:8px;flex-wrap:wrap}.filter-btn{padding:10px 13px;border-radius:13px;border:1px solid var(--line);background:#0f1730;color:#b9c4e4;font:inherit;font-weight:700;cursor:pointer}.filter-btn:hover,.filter-btn.active{color:#fff;border-color:rgba(124,92,255,.5);background:rgba(124,92,255,.16)}.compare-link{white-space:nowrap}.count-badge{display:inline-grid;place-items:center;min-width:22px;height:22px;padding:0 6px;border-radius:99px;background:rgba(255,255,255,.12);margin-left:5px;font-size:.8rem}.empty-state{text-align:center;padding:38px}.card-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:auto}.card-actions .btn{font-size:.88rem}.compare-toggle.selected{border-color:rgba(95,225,255,.45);background:rgba(95,225,255,.12)}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:20px}.compare-table{width:100%;min-width:720px;border-collapse:collapse;background:rgba(8,13,29,.72)}.compare-table th,.compare-table td{padding:16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.compare-table thead th{background:rgba(18,27,55,.9)}.compare-table tbody th{color:#c8d1ec;width:180px}.remove-compare{display:block;margin-top:7px;background:none;border:0;color:var(--muted);cursor:pointer;padding:0;font:inherit}.remove-compare:hover{color:#fff}.compare-actions{display:flex;justify-content:space-between;gap:12px;margin-bottom:14px}.compare-head{display:flex;flex-direction:column;gap:10px}
.blog-grid{grid-template-columns:repeat(3,1fr)}.article-card{min-height:260px}.article-card h3{margin:12px 0 8px}.article-card .tag{margin-top:18px}
.form-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:20px;align-items:start}.form-card{padding:26px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.form-card label{display:flex;flex-direction:column;gap:7px;color:#cbd4f0;font-weight:700;font-size:.9rem}.form-card input,.form-card select,.form-card textarea{width:100%;border:1px solid var(--line);border-radius:14px;background:#0a1228;color:#fff;padding:13px 14px;font:inherit;outline:none}.form-card input:focus,.form-card select:focus,.form-card textarea:focus{border-color:rgba(95,225,255,.6);box-shadow:0 0 0 3px rgba(95,225,255,.08)}.field-wide{margin-top:15px}.check-row{flex-direction:row!important;align-items:flex-start;margin-top:15px}.check-row input{width:auto;margin-top:5px}.form-status{min-height:1.5em;color:#72e6ff}.form-aside{min-height:100%;padding:28px}.mini-list{display:grid;gap:12px;margin-top:24px}.mini-list>div{display:grid;grid-template-columns:38px 1fr;gap:8px;align-items:start}.mini-list strong{color:var(--accent3)}
.auth-card{max-width:760px}.account-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.section-mini{margin-top:38px}.request-list{display:grid;gap:14px}.request-item h3{margin:10px 0}.request-item p{margin:6px 0}
.footer{padding:45px 0;border-top:1px solid var(--line);margin-top:60px;color:var(--muted)}
.language-switcher{display:flex;align-items:center;flex:0 0 auto}.language-switcher label{display:flex;align-items:center;gap:7px;padding:6px 10px;border:1px solid var(--line);border-radius:12px;background:rgba(12,19,43,.72);color:var(--muted)}.language-switcher select{appearance:none;background:transparent;border:0;color:#fff;font:inherit;cursor:pointer;outline:0}.language-switcher option{background:#0b1227;color:#fff}.language-switcher span{color:var(--accent2);font-size:.9rem}
@media(max-width:980px){.hero-grid,.detail,.form-layout,.account-grid{grid-template-columns:1fr}.grid{grid-template-columns:repeat(2,1fr)}.blog-grid{grid-template-columns:repeat(2,1fr)}.spacetime-visual{min-height:360px}.links{display:none}.menu{display:block;margin-left:4px}.catalog-toolbar{grid-template-columns:1fr}.compare-link{justify-self:start}.links.open{display:flex;position:absolute;top:76px;left:20px;right:70px;padding:16px;background:rgba(5,8,22,.97);border:1px solid var(--line);border-radius:16px;flex-direction:column;gap:12px}}
@media(max-width:620px){.container{width:min(var(--max),calc(100% - 24px))}.nav{min-height:68px}.hero{padding-top:62px}.grid,.stats,.facts,.form-grid,.blog-grid{grid-template-columns:1fr}.hero h1{font-size:3.5rem}.section{padding:52px 0}.concept-glyph,.concept-visual.small{height:150px}.concept-visual.large{height:300px}.language-switcher label{padding:5px 8px}.language-switcher span{display:none}.links.open{top:68px;left:12px;right:12px}.page-head{padding-top:56px}}