/* Star competition learning — observatory / sky-atlas visual language */
body[data-workspace="study"]{--sky-ink:#edf2ff;--sky-muted:#9eadd0;--sky-line:rgba(149,168,224,.2);--sky-cyan:#77d7e7;--sky-violet:#a99bff}
body[data-workspace="study"]{background:radial-gradient(ellipse at 50% -15%,#26376c 0,#111a3b 43%,#090f25 100%)}
body[data-workspace="study"] #starsBg{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;opacity:.72}
body[data-workspace="study"] .app{position:relative;z-index:1;background:transparent}
body[data-workspace="study"] .navbar{background:rgba(9,16,39,.82);border-bottom:1px solid var(--sky-line);backdrop-filter:blur(14px)}
body[data-workspace="study"] .study-intro{position:relative;overflow:hidden;margin:22px 26px 18px;padding:30px 32px;border:1px solid rgba(145,158,232,.3);border-radius:20px;background:radial-gradient(circle at 88% 30%,rgba(124,111,219,.28),transparent 26%),linear-gradient(115deg,rgba(20,31,72,.97),rgba(24,38,82,.9) 62%,rgba(28,43,86,.84));box-shadow:0 22px 60px rgba(0,0,0,.2)}
body[data-workspace="study"] .study-intro h2{font-size:clamp(24px,3vw,34px);color:#f5f4ff;letter-spacing:-.6px}
body[data-workspace="study"] .study-intro p{max-width:760px;color:#c1cbea;font-size:14px;line-height:1.75}
body[data-workspace="study"] .study-tags span{border:1px solid rgba(159,174,245,.25);background:rgba(141,150,234,.1);color:#dce5ff;padding:7px 10px;border-radius:99px}
body[data-workspace="study"] .study-intro .orbit{width:104px;height:104px;border:1px solid rgba(151,171,255,.35);border-radius:50%;display:grid;place-items:center;color:#d8d5ff;font-size:42px;box-shadow:0 0 0 13px rgba(130,143,229,.06),0 0 0 28px rgba(130,143,229,.035);animation:sky-orbit 18s linear infinite}
@keyframes sky-orbit{to{transform:rotate(360deg)}}
body[data-workspace="study"] .product-workflow{margin:0 26px 20px;padding:20px;border:1px solid var(--sky-line);border-radius:18px;background:rgba(15,24,55,.88);box-shadow:0 12px 34px rgba(0,0,0,.15)}
body[data-workspace="study"] .product-workflow__head h3{color:#f0f1ff}
body[data-workspace="study"] .product-workflow__head p{color:#aebbdc}
body[data-workspace="study"] .product-workflow__grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
body[data-workspace="study"] .product-workflow__item{min-height:128px;padding:16px;border:1px solid rgba(154,170,235,.2);border-radius:13px;background:linear-gradient(145deg,rgba(34,48,94,.95),rgba(20,31,67,.95));text-align:left}
body[data-workspace="study"] .product-workflow__item i{background:rgba(136,156,247,.14);color:#b8c7ff}
body[data-workspace="study"] .product-workflow__item b{color:#f0f2ff;font-size:14px}
body[data-workspace="study"] .product-workflow__item small{color:#aebcdb;font-size:12px}
body[data-workspace="study"] .product-workflow__item span{color:#8de0e9}
body[data-workspace="study"] #view{margin:0 26px 28px;padding:18px;border:1px solid var(--sky-line);border-radius:18px;background:rgba(12,20,48,.78);color:#e9edff;box-shadow:0 12px 36px rgba(0,0,0,.16)}
body[data-workspace="study"] .tabbar{background:rgba(12,20,48,.92);border:1px solid var(--sky-line);border-radius:14px;backdrop-filter:blur(12px)}
body[data-workspace="study"] .tabbar button.active{background:linear-gradient(135deg,#46569a,#267f98);color:#fff}
@media(max-width:900px){body[data-workspace="study"] .product-workflow__grid{grid-template-columns:repeat(2,minmax(0,1fr))}body[data-workspace="study"] .study-intro,body[data-workspace="study"] .product-workflow,body[data-workspace="study"] #view{margin-left:14px;margin-right:14px}}
@media(max-width:560px){body[data-workspace="study"] .product-workflow__grid{grid-template-columns:1fr}body[data-workspace="study"] .study-intro{padding:20px 17px}body[data-workspace="study"] .study-intro .orbit{display:none}}


/* StarStudy v2: astronomy classroom and observation-planning workspace */
body[data-workspace="study"]{--sky-glow:#86a8ff;--sky-line:#34466f}
body[data-workspace="study"] .study-intro{position:relative;overflow:hidden;min-height:220px;padding:30px 32px;border:1px solid #344a78;border-radius:20px;background:radial-gradient(circle at 82% 20%,rgba(100,140,255,.23),transparent 25%),radial-gradient(circle at 62% 110%,rgba(48,175,205,.13),transparent 35%),linear-gradient(115deg,#101a3a,#1b2853 62%,#142e4a)}
body[data-workspace="study"] .study-intro h2{font-size:clamp(28px,3vw,42px);letter-spacing:-.035em;color:#f0f3ff}
body[data-workspace="study"] .study-intro p{max-width:760px;color:#b8c5e6;line-height:1.8}
body[data-workspace="study"] .product-workflow{margin-top:18px;padding:22px;border:1px solid #34466f;border-radius:18px;background:linear-gradient(145deg,rgba(20,31,68,.96),rgba(13,23,52,.96));box-shadow:0 14px 36px rgba(0,0,0,.2)}
body[data-workspace="study"] .product-workflow__head h3{font-size:19px;color:#eff3ff}
body[data-workspace="study"] .product-workflow__grid{gap:12px}
body[data-workspace="study"] .product-workflow__item{min-height:144px;padding:17px;border:1px solid #3a4e7d;border-radius:14px;background:linear-gradient(150deg,#202f60,#18264d);transition:transform .18s,border-color .18s,box-shadow .18s}
body[data-workspace="study"] .product-workflow__item:hover{transform:translateY(-2px);border-color:#829fe8;box-shadow:0 12px 25px rgba(0,0,0,.24)}
body[data-workspace="study"] .product-workflow__item i{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:rgba(130,159,232,.16);color:#b6c9ff;font-style:normal}
body[data-workspace="study"] #view{max-width:1660px;margin-inline:auto;padding:22px;border-color:#34466f;background:linear-gradient(150deg,rgba(14,24,54,.94),rgba(10,18,42,.94));box-shadow:0 16px 42px rgba(0,0,0,.2)}
body[data-workspace="study"] #view :is(.card,.panel,.module-card){border:1px solid #34466f;border-radius:15px;background:rgba(25,39,81,.82);box-shadow:0 9px 24px rgba(0,0,0,.15)}
body[data-workspace="study"] #view :is(input,select,textarea){min-height:40px;border:1px solid #465b8b;border-radius:9px;background:#101d43;color:#edf2ff}
body[data-workspace="study"] .tabbar{position:sticky;top:8px;z-index:20;padding:5px}
body[data-workspace="study"] .tabbar button{min-height:39px;border-radius:10px}
body[data-workspace="study"] canvas#starsBg{opacity:.72}
@media(max-width:760px){body[data-workspace="study"] .study-intro{padding:22px 18px;min-height:0}body[data-workspace="study"] .product-workflow{padding:16px}body[data-workspace="study"] #view{padding:13px;margin-bottom:18px}}
@media(prefers-reduced-motion:reduce){body[data-workspace="study"] .product-workflow__item{transition:none}}


/* Question evidence: distinguish collected source candidates from human-verified answers. */
body .w5-question-evidence{
  margin-top:14px;padding:13px 15px;border:1px solid rgba(221,164,78,.45);
  border-radius:12px;background:rgba(150,101,34,.10);color:var(--tx);
  font-size:13px;line-height:1.65;
}
body .w5-question-evidence.is-verified{
  border-color:rgba(64,167,126,.45);background:rgba(30,120,89,.09);
}
body .w5-question-evidence>b{display:block;margin-bottom:5px;font-size:13px;font-weight:800}
body .w5-question-evidence>p{margin:5px 0;color:var(--sub);font-size:12px}
body .w5-question-evidence ul{margin:8px 0 5px;padding-left:20px;display:grid;gap:6px}
body .w5-question-evidence li{padding-left:2px}
body .w5-question-evidence a{color:var(--blue);text-decoration:underline;text-underline-offset:2px}
body .w5-question-evidence small{display:block;color:var(--sub);font-size:11px}
body .w5-question-evidence>small{margin-top:8px}