/* VYSN AI - public share pages (Rounds post previews, MCQ challenges, /community). Light, fast, no JavaScript. */
:root{--bg:#f4f6fb;--card:#fff;--ink:#0f172a;--soft:#3d4658;--muted:#5b6476;--line:#e6eaf2;--line2:#d8dee9;--blue:#4357f6;--blue-ink:#2f40d6;--blue-soft:#eef0ff;
  --grad:linear-gradient(135deg,#4f63ff 0%,#6a5cf7 55%,#8a6cf7 100%);--shadow:0 1px 1px rgba(15,23,42,.03),0 2px 6px rgba(15,23,42,.04),0 12px 28px -14px rgba(15,23,42,.14);
  --ok:#15803d;--ok-soft:#ecfbf1;--bad:#b91c1c;--bad-soft:#fef2f2;color-scheme:light}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  background-image:radial-gradient(1100px 420px at 85% -120px,rgba(124,92,247,.16),transparent 70%),radial-gradient(800px 380px at -10% -80px,rgba(79,99,255,.12),transparent 70%);background-repeat:no-repeat}
a{color:var(--blue-ink)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:3px solid rgba(67,87,246,.45);outline-offset:2px;border-radius:10px}
.sh-i{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:0 0 auto;vertical-align:-4px}

.sh-top{max-width:680px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:16px 18px}
.sh-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:500 19px 'Instrument Sans','Inter',sans-serif;letter-spacing:-.01em}
.sh-brand b{font-weight:700;color:#6a4fe0}
.sh-brand img{filter:drop-shadow(0 4px 8px rgba(94,64,218,.25))}
.sh-signin{font-weight:600;font-size:15px;text-decoration:none;padding:9px 16px;border-radius:999px;background:var(--card);border:1px solid var(--line2);color:var(--ink)}
.sh-wrap{max-width:680px;margin:0 auto;padding:4px 16px 28px;display:flex;flex-direction:column;gap:16px}

.sh-card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:var(--shadow)}
.sh-center{text-align:center;display:flex;flex-direction:column;align-items:center;gap:6px;padding:40px 20px}
.sh-h1{margin:0;font:700 24px 'Instrument Sans','Inter',sans-serif}
.sh-h2{margin:10px 2px 12px;font:700 20px 'Instrument Sans','Inter',sans-serif;letter-spacing:-.01em}
.sh-muted{color:var(--muted)}.sh-small{font-size:14px;margin:4px 0 14px}.sh-tiny{font-size:12.5px;margin:14px 0 0}

/* post */
.sh-head{display:flex;align-items:center;gap:12px}
.sh-av{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,#e9ecff,#f3edff);color:var(--blue);flex:0 0 auto;overflow:hidden}
.sh-av.team{background:none}
.sh-av img{width:46px;height:46px;border-radius:14px}
.sh-who{flex:1;min-width:0;display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.sh-who b{font-size:16px}
.sh-who small{flex-basis:100%;font-size:13px;color:var(--muted);margin-top:-2px}
.sh-badge{font-size:11px;font-weight:700;padding:2px 9px;border-radius:999px;background:var(--grad);color:#fff}
.sh-tick{color:var(--blue);display:inline-grid}.sh-tick .sh-i{width:18px;height:18px}
.sh-tag{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:12.5px;font-weight:600;padding:4px 11px;border-radius:999px;background:#f1f4f9;color:var(--soft)}
.sh-tag i{width:7px;height:7px;border-radius:50%;background:#94a3b8}
.t-case{background:#fff1f3;color:#be123c}.t-case i{background:#e11d48}.t-question{background:#eef4ff;color:#1d4ed8}.t-question i{background:#2563eb}
.t-exam{background:#ecfbf1;color:#15803d}.t-exam i{background:#16a34a}.t-intern{background:#fff7e8;color:#b45309}.t-intern i{background:#d97706}
.t-research{background:#f4efff;color:#6d28d9}.t-research i{background:#7c3aed}.t-career{background:#ebfafc;color:#0e7490}.t-career i{background:#0891b2}
.t-news{background:#f1f4f9;color:#334155}.t-news i{background:#475569}
.sh-body{margin-top:10px;font-size:16.5px;line-height:1.65;overflow-wrap:anywhere}
.sh-body.fade{max-height:340px;overflow:hidden;-webkit-mask-image:linear-gradient(#000 70%,transparent);mask-image:linear-gradient(#000 70%,transparent)}
.sh-hash{color:var(--blue-ink);font-weight:550}
.sh-photos{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:14px;position:relative;text-decoration:none;border-radius:16px;overflow:hidden}
.sh-ph{aspect-ratio:4/3;display:grid;place-items:center;background:linear-gradient(135deg,#e7eaf3,#f2eefe);color:#a3acc2}
.sh-ph .sh-i{width:34px;height:34px}
.sh-photos.one .sh-ph{grid-column:span 2;aspect-ratio:16/7}
.sh-phtxt{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:flex;align-items:center;gap:6px;white-space:nowrap;background:rgba(15,23,42,.78);color:#fff;font-size:13.5px;font-weight:600;padding:8px 14px;border-radius:999px}
.sh-phtxt .sh-i{width:16px;height:16px}
.sh-stats{display:flex;gap:18px;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
.sh-stats span{display:flex;align-items:center;gap:6px}

/* the "join to see more" gate */
.sh-gate{position:relative;padding-top:6px}
.sh-ghosts{display:flex;flex-direction:column;gap:10px;filter:blur(3px);opacity:.75;pointer-events:none;user-select:none}
.sh-ghost{display:flex;gap:10px;align-items:flex-start}
.g-av{width:34px;height:34px;border-radius:50%;background:#dfe4f0;flex:0 0 auto}
.g-lines{flex:1;background:var(--card);border:1px solid var(--line);border-radius:6px 18px 18px 18px;padding:14px;display:flex;flex-direction:column;gap:8px}
.g-lines i{display:block;height:10px;border-radius:6px;background:#e3e8f2}.g-lines i.s{width:55%}
.sh-gatecard{position:relative;margin-top:-110px;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:24px;padding:24px 20px;box-shadow:0 24px 50px -24px rgba(67,87,246,.45);text-align:center;display:flex;flex-direction:column;align-items:center}
.sh-gatecard h2{margin:6px 0 6px;font:700 21px 'Instrument Sans','Inter',sans-serif;letter-spacing:-.01em}
.sh-gatecard p{margin:0 0 16px;color:var(--soft);font-size:15px;max-width:460px}
.sh-cta2{margin-top:0}
.sh-lock{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:var(--grad);color:#fff;box-shadow:0 12px 24px -10px rgba(67,87,246,.8)}
.sh-lock .sh-i{width:24px;height:24px}
.sh-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:13px 26px;border-radius:999px;background:var(--grad);color:#fff;font:700 16px 'Inter',sans-serif;text-decoration:none;box-shadow:0 12px 26px -10px rgba(67,87,246,.75);transition:transform .12s}
.sh-btn:active{transform:scale(.98)}
.sh-link{display:inline-block;margin-top:10px;padding:8px;font-weight:600;font-size:15px;text-decoration:none}
.sh-note{margin-top:10px!important;font-size:13.5px!important;background:#fff7e8;color:#8a4b00!important;padding:10px 12px;border-radius:12px}
.sh-ticks{list-style:none;padding:0;margin:16px 0 0;display:flex;flex-direction:column;gap:8px;text-align:left;font-size:14px;color:var(--soft)}
.sh-ticks li{display:flex;gap:8px;align-items:center}.sh-ticks .sh-i{color:var(--blue);width:18px;height:18px}

/* MCQ */
.sh-kicker{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--blue)}
.sh-kicker .sh-i{width:17px;height:17px}
.sh-q{margin:10px 0 0;font:650 21px/1.45 'Inter',sans-serif;letter-spacing:-.01em}
.sh-opts{display:flex;flex-direction:column;gap:10px}
.sh-r{position:absolute;opacity:0;pointer-events:none}
.sh-opt{display:flex;align-items:center;gap:12px;min-height:56px;padding:12px 14px;border:1.5px solid var(--line2);border-radius:16px;background:var(--card);cursor:pointer;font-size:15.5px;transition:border-color .15s,background .15s}
.sh-opt:hover{border-color:#b9c2d6}
.sh-l{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:#f1f4f9;font-weight:700;font-size:14px;flex:0 0 auto}
.sh-opt>span:nth-child(2){flex:1}
.sh-r:focus-visible+.sh-opt{box-shadow:0 0 0 3px rgba(67,87,246,.45)}
.sh-reveal,.sh-showans{display:none}
@supports selector(:has(a)){
  .sh-opts:has(.sh-r:checked) .sh-opt{pointer-events:none}
  .sh-opts:has(.sh-r:checked) .sh-opt.ok{border-color:#16a34a;background:var(--ok-soft)}
  .sh-opts:has(.sh-r:checked) .sh-opt.ok .sh-l{background:#16a34a;color:#fff}
  .sh-opts:has(.sh-r:checked) .sh-opt.ok .sh-res::after{content:"✓ Correct";color:var(--ok);font-weight:700;font-size:13px}
  .sh-r:checked+.sh-opt:not(.ok){border-color:#ef4444;background:var(--bad-soft)}
  .sh-r:checked+.sh-opt:not(.ok) .sh-l{background:#ef4444;color:#fff}
  .sh-r:checked+.sh-opt:not(.ok) .sh-res::after{content:"Your answer";color:var(--bad);font-weight:600;font-size:13px}
  .sh-opts:has(.sh-r:checked) .sh-reveal{display:block;animation:shin .3s ease}
}
@supports not selector(:has(a)){.sh-showans{display:block;margin-top:14px}}
@keyframes shin{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.sh-reveal{margin-top:6px;padding:14px 16px;border-radius:16px;background:var(--blue-soft);font-size:15px;line-height:1.6}
.sh-ans{display:flex;gap:6px;align-items:flex-start;color:var(--ok);margin-bottom:6px}
.sh-showans summary{cursor:pointer;font-weight:600;color:var(--blue-ink)}

/* /community landing */
.sh-hero{text-align:center;padding:26px 6px 6px;display:flex;flex-direction:column;align-items:center}
.sh-pill{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;padding:6px 12px;border-radius:999px;background:var(--card);border:1px solid var(--line);color:var(--blue-ink)}
.sh-pill .sh-i{width:16px;height:16px}
.sh-hero h1{margin:16px 0 10px;font:700 clamp(30px,7vw,44px)/1.12 'Instrument Sans','Inter',sans-serif;letter-spacing:-.025em;max-width:600px}
.sh-hero p{margin:0;color:var(--soft);font-size:17px;max-width:540px}
.sh-herobtns{display:flex;flex-direction:column;align-items:center;gap:2px;margin-top:22px}
.sh-nums{display:flex;gap:18px;margin-top:14px;color:var(--muted);font-size:14.5px}.sh-nums b{color:var(--ink)}
.sh-feats{display:grid;grid-template-columns:1fr;gap:12px;margin-top:6px}
@media (min-width:640px){.sh-feats{grid-template-columns:repeat(3,1fr)}}
.sh-feat{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow)}
.sh-feat>span{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:var(--blue-soft);color:var(--blue);margin-bottom:10px}
.sh-feat b{font-size:16px}.sh-feat p{margin:4px 0 0;color:var(--muted);font-size:14.5px;line-height:1.5}
.sh-list{display:flex;flex-direction:column;gap:10px}
.sh-mini{display:flex;flex-direction:column;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:14px 16px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:transform .12s}
.sh-mini:hover{transform:translateY(-1px)}
.sh-mini .sh-tag{margin:0;align-self:flex-start}
.sh-mini b{font-size:16px;line-height:1.4}
.sh-mstats{display:flex;align-items:center;gap:5px;color:var(--muted);font-size:13px}.sh-mstats .sh-i{width:16px;height:16px}
.sh-faq{display:flex;flex-direction:column;gap:8px}
.sh-faq details{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px 16px}
.sh-faq summary{cursor:pointer;font-weight:600}
.sh-faq p{margin:8px 0 0;color:var(--soft);font-size:15px}

.sh-foot{max-width:680px;margin:0 auto;padding:10px 18px 40px;text-align:center;color:var(--muted);font-size:13px}
.sh-foot p{margin:4px 0}.sh-foot a{color:var(--muted)}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}