:root{--primary:#00eaff;--primary-dark:#6260e6;--accent:#F7BB33;--accent2:#FF00FF;--accent3:#cc9944;--bg:#f7fdff;--card:#ffffffcc;--blue:#0070CC;--red:#e74c3c;--green:#2ecc71;--text:#111;--muted:#666;--shadow:0 8px 24px #0002;--radius:18px}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:linear-gradient(160deg,#f7fdff,#d9fbff 45%,#f9f8ff);color:var(--text);min-height:100vh}.screen{min-height:100vh;display:flex;flex-direction:column;padding:14px;max-width:980px;margin:0 auto}.topbar{display:flex;gap:10px;align-items:center;justify-content:space-between;margin-bottom:12px}.title{font-size:clamp(24px,5vw,42px);text-align:center;font-weight:700;margin:16px 0}.subtitle{text-align:center;color:var(--muted);margin-top:-6px;margin-bottom:16px}.lang{padding:10px;border-radius:12px;border:1px solid #ddd;background:white}.grid{display:grid;gap:13px}.category-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-content:center;margin:auto 0}.card-button,.btn{border:0;border-radius:var(--radius);background:#0277bd;color:white;padding:20px 12px;font-size:28px;font-weight:700;box-shadow:var(--shadow);cursor:pointer;min-height:72px}.card-button:active,.btn:active{transform:translateY(1px)}.btn{font-size:17px;background:#0277bd;min-height:48px;padding:12px 16px}.btn.secondary{background:#4b4989}.btn.orange{background:var(--accent);color:#111}.btn.red{background:var(--red)}.btn.green{background:var(--green);color:#052}.btn.ghost{background:#fff;color:#111;border:1px solid #ddd}.btn.magenta{background:var(--accent2)}.footer-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:20px 0 6px}.mode-grid{grid-template-columns:repeat(2,minmax(0,1fr));max-width:440px;width:100%;margin:30px auto;gap:18px}.mode-grid .wide{grid-column:1/-1}.panel{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}.small{font-size:13px;color:var(--muted)}.hidden{display:none!important}.loader{display:flex;gap:12px;align-items:center;justify-content:center;margin:20px auto;color:#333}.spinner{width:34px;height:34px;border:4px solid #ddd;border-top-color:var(--accent3);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.menu-list{display:grid;gap:10px}.menu-item{display:flex;justify-content:space-between;align-items:center;background:#fff;border-radius:16px;padding:15px;box-shadow:var(--shadow);cursor:pointer}.menu-item .desc{font-size:18px;font-weight:700}.menu-item .count{font-weight:700}.menu-item.free .count,.menu-item.free .free-label{color:green}.menu-item.locked .count{color:#d22}.question-card{display:flex;flex-direction:column;gap:12px}.top-info{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;text-align:center}.top-info div{background:#fff;border-radius:12px;padding:8px;box-shadow:0 2px 8px #0001}.media-box{min-height:180px;display:flex;flex-direction:column;gap:10px;align-items:center;justify-content:center;background:#fff;border-radius:14px;overflow:hidden;border:1px solid #e5e5e5}.media-box img,.media-box video{max-width:100%;max-height:46vh;object-fit:contain}.question-text{font-size:20px;line-height:1.35;background:#fff;padding:14px;border-radius:14px;border:1px solid #e5e5e5;white-space:pre-wrap}.answers{display:grid;gap:10px}.answer-btn{background:#fff;border:2px solid #d8d8d8;color:#111;border-radius:14px;padding:14px;text-align:left;font-size:17px;cursor:pointer;min-height:52px}.answer-btn.selected{background:var(--accent2);color:white;border-color:var(--accent2)}.answer-btn.correct{background:var(--green);color:#052;border-color:var(--green)}.answer-btn.wrong{background:var(--red);color:white;border-color:var(--red)}.middle{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.explain-box{white-space:pre-wrap;line-height:1.45}.progress-line{height:10px;background:#e6e6e6;border-radius:999px;overflow:hidden}.progress-line>span{display:block;height:100%;background:linear-gradient(90deg,#5ed65e,#f7bb33);width:100%}.summary{display:grid;gap:12px;text-align:center}.result-positive{color:green}.result-negative{color:#d22}.answer-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;max-width:260px;margin:0 auto}.answer-grid button{border:0;border-radius:9px;padding:8px;background:#ddd}.answer-grid button.good{background:#2ecc71}.answer-grid button.bad{background:#e74c3c;color:#fff}.answer-grid button.none{background:#bbb}.answer-grid button.current{filter:brightness(.72);box-shadow:inset 0 0 0 2px #444}.sign-toolbar{display:grid;grid-template-columns:1fr;gap:10px;margin-bottom:10px}.search{padding:13px;border:1px solid #ddd;border-radius:12px;font-size:16px}.signs-list{display:grid;gap:8px}.sign-row{display:flex;align-items:center;gap:12px;min-height:72px;padding:8px 0;border-bottom:1px solid #0001}.sign-row img{width:70px;height:70px;object-fit:contain;flex:0 0 auto}.sign-code{font-weight:700;margin:2px 0}.sign-title{font-size:14px}.sign-category{font-size:13px;color:var(--muted);margin-top:2px}.book-list{display:grid;gap:10px;max-width:520px;margin:20px auto;width:100%}.book-content{background:#fff;border-radius:14px;padding:16px;line-height:1.55;white-space:pre-wrap}.book-content b{color:#111}.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);background:#111;color:#fff;padding:12px 16px;border-radius:999px;z-index:9999;max-width:92vw;box-shadow:var(--shadow)}.upload-box{border:1px dashed #aaa;padding:12px;border-radius:14px;background:#fff;margin:12px 0}.contact{font-size:14px;text-align:center;color:#333}.modal-backdrop{position:fixed;inset:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:9998;padding:16px}.modal{background:white;border-radius:18px;max-width:720px;max-height:86vh;overflow:auto;padding:18px;box-shadow:var(--shadow)}.modal img{max-width:100%;max-height:60vh;display:block;margin:auto}.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:14px}@media(max-width:560px){.screen{padding:10px}.category-grid{gap:9px}.card-button{font-size:24px;min-height:64px}.top-info{grid-template-columns:1fr}.middle{grid-template-columns:1fr}.answer-grid{grid-template-columns:repeat(6,1fr);max-width:240px}.question-text{font-size:18px}.sign-toolbar{grid-template-columns:1fr}}
.premium-bar{display:flex;gap:10px;align-items:center;justify-content:space-between;background:#fff;border:1px solid #e4e4e4;border-radius:14px;padding:10px 12px;margin:0 0 12px;box-shadow:0 2px 10px #0001;color:#a33;font-weight:700}.premium-bar.active{color:#176b31;background:#f1fff5;border-color:#bfe9c8}.mini-btn{border:0;border-radius:999px;background:#0277bd;color:#fff;padding:8px 12px;font-weight:700;cursor:pointer}.subscription-screen{display:grid;gap:14px;max-width:720px;margin:0 auto;width:100%}.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}.plan-card{display:flex;flex-direction:column;gap:8px;align-items:flex-start;justify-content:center;background:#fff;border:2px solid #0277bd;border-radius:18px;min-height:104px;padding:18px;box-shadow:var(--shadow);cursor:pointer;text-align:left;color:#111}.plan-card b{font-size:20px}.plan-card span{font-size:16px;color:#333}.billing-actions{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px}.menu-item.locked{background:#fff7f7}.menu-item.locked .count{color:#b3261e}.free-label{margin-left:6px}code{background:#f1f1f1;border-radius:6px;padding:2px 5px}

.account-box{display:flex;flex-direction:column;gap:6px;margin-top:12px}.account-box span{font-weight:700}.account-box input{box-sizing:border-box;width:100%}

.video-start-btn{margin:8px auto 4px;min-width:140px}

.proper-label{text-align:center;color:green}.answer-grid button.current{outline:3px solid #111}.review-grid{grid-template-columns:repeat(6,max-content);justify-content:center;overflow-x:auto}.middle .btn:disabled{opacity:.45;cursor:not-allowed}

.jump-controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:center;margin:10px 0}.jump-controls label{display:flex;flex-direction:column;gap:4px;font-size:.8rem;color:#555}.jump-controls input{max-width:110px;border:1px solid #c9d3e6;border-radius:10px;padding:8px 10px;font:inherit;text-align:center}

.btn.back-link{background:transparent;color:#0277bd;border:0;box-shadow:none;min-height:auto;padding:4px 2px;font-size:15px;font-weight:600}
.btn.back-link:active{transform:none}

.difficult-counter{display:inline-block;border-radius:10px;padding:7px 12px;background:#e7f4ff}.difficult-counter.difficult-removed{background:#ffdede}.difficult-counter.difficult-kept{background:#e7f4ff}

.exam-controls-panel{display:grid;gap:8px;text-align:center}.exam-finish-row{display:flex;justify-content:center}.finish-top-btn{max-width:220px;width:100%;min-height:40px;padding:8px 12px;font-size:15px}

.menu-item.premium-active .count{color:green}

.card-button,.btn,.menu-item .desc,.menu-item .count{white-space:pre-line}