.stc-app{font-family:Inter,Arial,sans-serif;margin:24px auto;max-width:920px}.stc-shell{background:#0d0f12;color:#fff;border-radius:24px;padding:28px;box-shadow:0 20px 50px rgba(0,0,0,.22);border:1px solid rgba(255,255,255,.08)}.stc-topbar{display:flex;justify-content:space-between;gap:18px;align-items:flex-start}.stc-kicker{margin:0 0 8px;color:#89ffb0;text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:800}.stc-title{margin:0;font-size:clamp(26px,4vw,44px);line-height:1.08;color:#fff}.stc-timer-wrap{background:#171b20;border:1px solid rgba(255,255,255,.08);border-radius:18px;padding:14px 18px;text-align:center;min-width:155px}.stc-timer-label{display:block;color:#a7adb7;font-size:12px;margin-bottom:4px}.stc-timer{font-size:34px;font-weight:900;letter-spacing:.03em}.stc-tabs{display:flex;gap:10px;margin:26px 0 18px}.stc-tab{border:1px solid rgba(255,255,255,.12);background:#171b20;color:#cfd6df;padding:10px 16px;border-radius:999px;cursor:pointer;font-weight:800}.stc-tab.active{background:#fff;color:#0d0f12}.stc-panel{display:none}.stc-panel.active{display:block}.stc-description{color:#d9dee7;font-size:16px;line-height:1.7;background:rgba(255,255,255,.04);padding:18px;border-radius:18px}.stc-steps{display:grid;gap:12px;margin-top:18px}.stc-step{display:flex;align-items:center;gap:12px;background:#15191f;border:1px solid rgba(255,255,255,.08);border-radius:18px;padding:15px;cursor:pointer;transition:.2s ease}.stc-step:hover{transform:translateY(-1px);border-color:rgba(137,255,176,.35)}.stc-step input{position:absolute;opacity:0}.stc-check-ui{display:flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:8px;border:2px solid #58606b;color:transparent;font-weight:900;flex:none}.stc-step input:checked + .stc-check-ui{background:#89ffb0;border-color:#89ffb0;color:#0d0f12}.stc-step input:checked ~ .stc-step-text{text-decoration:line-through;color:#929aa6}.stc-step-text{flex:1;font-weight:750}.stc-step-time{background:rgba(255,255,255,.08);border-radius:999px;padding:6px 10px;color:#dce2e9;font-size:13px;font-weight:800}.stc-result-box{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);padding:20px;border-radius:18px;color:#d9dee7;line-height:1.7}.stc-result-box h3{margin-top:0;color:#fff}.stc-status{margin:18px 0 0;font-size:18px;font-weight:900}.stc-status.success{color:#89ffb0}.stc-status.failed{color:#ff8b8b}.stc-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.stc-btn{border:0;border-radius:14px;padding:13px 18px;font-weight:900;cursor:pointer;background:#252b33;color:#fff}.stc-btn:disabled{opacity:.45;cursor:not-allowed}.stc-btn-primary{background:#89ffb0;color:#0d0f12}.stc-empty,.stc-error{padding:14px;border-radius:12px;background:#fff4ce;color:#201500}@media(max-width:640px){.stc-shell{padding:20px}.stc-topbar{display:block}.stc-timer-wrap{margin-top:16px;text-align:left}.stc-step{align-items:flex-start}.stc-step-time{margin-left:auto}}