:root{--bg:#07101d;--bg2:#0c1728;--panel:#111e31;--panel2:#172841;--line:#263b59;--text:#f3f7ff;--muted:#9fb0c9;--blue:#72adff;--green:#63d6a4;--yellow:#ffd074;--red:#ff8691;--purple:#b59cff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 70% -10%,#17345c 0,#0b1728 30%,#07101d 70%);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif}
button,input,select{font:inherit}.app{min-height:100vh;display:grid;grid-template-columns:255px 1fr}
.sidebar{height:100vh;position:sticky;top:0;padding:22px 15px;border-right:1px solid var(--line);background:rgba(6,15,27,.92);backdrop-filter:blur(16px);overflow:auto}
.logo{font-weight:900;font-size:23px;letter-spacing:-.5px}.logo span{color:var(--blue)}.sub{color:var(--muted);font-size:12px;margin:5px 0 18px}.nav button{display:flex;width:100%;gap:9px;align-items:center;border:0;background:transparent;color:var(--text);border-radius:11px;padding:10px 11px;margin:3px 0;text-align:left;cursor:pointer}.nav button:hover,.nav button.active{background:var(--panel2)}
.main{max-width:1350px;width:100%;padding:25px 28px 70px;margin:0 auto}.top{display:flex;align-items:center;gap:10px;position:sticky;top:0;z-index:5;padding:10px 0 16px;background:linear-gradient(180deg,#0b1728 65%,transparent)}
.search{width:min(660px,100%);border:1px solid var(--line);background:#0d192a;color:white;padding:12px 14px;border-radius:12px;outline:none}.search:focus{border-color:var(--blue)}
.section{display:none}.section.active{display:block}h1{font-size:31px;letter-spacing:-.7px;margin:10px 0 7px}h2{margin-top:25px}.muted{color:var(--muted)}.small{font-size:13px}.tiny{font-size:11px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}.card{background:linear-gradient(180deg,rgba(20,34,55,.96),rgba(13,25,42,.97));border:1px solid var(--line);border-radius:17px;padding:17px;box-shadow:0 14px 34px rgba(0,0,0,.15)}.card h3{margin:0 0 8px}
.stat{font-size:32px;font-weight:900}.pill{display:inline-flex;border:1px solid #37547b;background:#162947;color:#d8e8ff;padding:4px 8px;border-radius:999px;font-size:12px}.row{display:flex;gap:9px;flex-wrap:wrap;align-items:center}
.btn{border:1px solid var(--line);background:var(--panel2);color:var(--text);border-radius:10px;padding:9px 12px;cursor:pointer}.btn:hover{filter:brightness(1.1)}.primary{background:var(--blue);color:#07111f;border-color:transparent;font-weight:800}.good{background:var(--green);color:#062016;border:0}.warn{background:var(--yellow);color:#241b03;border:0}.danger{background:var(--red);color:#26070a;border:0}
.progress{height:10px;background:#1c2d45;border-radius:99px;overflow:hidden}.progress>div{height:100%;background:linear-gradient(90deg,var(--green),var(--blue))}
.list{display:grid;gap:8px}.item{border:1px solid var(--line);background:rgba(17,30,49,.8);border-radius:13px;padding:13px}.en{font-weight:800}.ru{color:#becbe0;margin-top:4px}.cat{font-size:11px;color:#8da2bf;margin-top:7px}
.flash{min-height:340px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center}.flash .front{font-size:30px;font-weight:900;max-width:900px}.flash .answer{font-size:21px;color:#cdd9eb;margin-top:18px;display:none}.flash.revealed .answer{display:block}.flash .hint{margin-bottom:14px}
table{width:100%;border-collapse:collapse}th,td{padding:11px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{color:#cce1ff;background:#111e31}.tablewrap{overflow:auto;max-height:72vh;border:1px solid var(--line);border-radius:14px}
.grammar-card details{margin-top:9px}.grammar-card summary{cursor:pointer;color:#d7e6fb}.grammar-body{white-space:pre-line;color:#c6d2e5;font-size:14px;line-height:1.55;margin-top:10px}
.filters{display:flex;gap:7px;flex-wrap:wrap;margin:14px 0}.filters select,.filters input{background:var(--panel);color:white;border:1px solid var(--line);border-radius:10px;padding:9px 10px}
.qbox{font-size:26px;font-weight:850;margin:22px 0}.choice{width:100%;text-align:left;margin:5px 0}.choice.correct{border-color:var(--green);background:#123a30}.choice.wrong{border-color:var(--red);background:#3b1f29}
.badge{padding:3px 7px;border-radius:7px;font-size:11px;background:#243b5c;color:#d8e8ff}.session-dots{display:flex;gap:4px;flex-wrap:wrap}.dot{width:8px;height:8px;border-radius:50%;background:#32435e}.dot.done{background:var(--green)}
.footer-note{margin-top:28px;color:#71839e;font-size:12px}
@media(max-width:850px){.app{grid-template-columns:1fr}.sidebar{height:auto;position:relative;border-right:0;border-bottom:1px solid var(--line);padding-bottom:10px}.nav{display:flex;overflow:auto;gap:5px}.nav button{min-width:max-content}.main{padding:16px}.top{position:relative}.flash .front{font-size:24px}h1{font-size:27px}}

.category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px;margin:14px 0}
.category-tile{cursor:pointer;transition:.18s transform,.18s border-color}.category-tile:hover{transform:translateY(-2px);border-color:#5277a7}
.category-tile .count{font-size:24px;font-weight:900;margin-top:8px}.cat-icon{font-size:24px}
.marine-tabs{display:flex;gap:7px;flex-wrap:wrap;margin:12px 0}.marine-tabs button.active{background:var(--blue);color:#07111f}

#grammarGrid{grid-template-columns:1fr;max-width:1000px}
.grammar-topic{padding:0;overflow:hidden}
.grammar-topic-head{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:18px 20px;cursor:pointer}
.grammar-topic-head:hover{background:rgba(114,173,255,.05)}
.grammar-topic-head h3{font-size:20px;margin-bottom:6px}
.grammar-topic-head p{margin:0;line-height:1.5;max-width:850px}
.grammar-chevron{font-size:25px;color:var(--blue);flex:0 0 auto}
.grammar-topic-body{display:none;border-top:1px solid var(--line);padding:4px 20px 18px}
.grammar-topic-body.open{display:block}
.grammar-rule{padding:16px 0;border-bottom:1px solid rgba(38,59,89,.65)}
.grammar-rule:last-child{border-bottom:0}
.grammar-rule h4{font-size:17px;margin:0 0 7px;color:#dceaff}
.grammar-rule p{margin:0 0 10px;color:#c4d0e2;line-height:1.6}
.grammar-example{display:grid;grid-template-columns:minmax(250px,1fr) minmax(220px,1fr);gap:12px;padding:8px 10px;margin:5px 0;background:#0d192a;border-radius:9px}
.grammar-example span{color:var(--muted)}
@media(max-width:650px){.grammar-example{grid-template-columns:1fr;gap:3px}}

.phrase-browser{display:none;margin-top:18px}
.phrase-browser.open{display:block}
.phrase-browser-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:12px}
.phrase-browser-title{font-size:23px;font-weight:900}
.word-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:9px}
.word-card{background:#0e1b2d;border:1px solid var(--line);border-radius:12px;padding:13px 14px;cursor:pointer;transition:.15s transform,.15s border-color,.15s background}
.word-card:hover{transform:translateY(-2px);border-color:#5e86b9;background:#13243b}
.word-card .english-only{font-weight:800;font-size:16px;line-height:1.35}
.word-card .tap-hint{font-size:10px;color:#7086a5;margin-top:6px}
.phrase-modal{display:none;position:fixed;inset:0;z-index:100;background:rgba(2,7,14,.76);backdrop-filter:blur(7px);padding:18px;align-items:center;justify-content:center}
.phrase-modal.open{display:flex}
.phrase-modal-box{width:min(760px,100%);max-height:88vh;overflow:auto;background:linear-gradient(180deg,#172841,#0d192a);border:1px solid #3b5578;border-radius:22px;padding:26px;box-shadow:0 30px 90px rgba(0,0,0,.55)}
.phrase-modal-close{float:right;border:0;background:#223955;color:white;width:36px;height:36px;border-radius:50%;cursor:pointer;font-size:18px}
.phrase-modal-en{font-size:29px;font-weight:900;line-height:1.3;padding:28px 0 12px;clear:both}
.phrase-modal-ru{font-size:21px;color:#c8d5e8;line-height:1.45;border-top:1px solid var(--line);padding-top:17px}
.phrase-modal-cat{margin-top:18px;color:#8297b5;font-size:12px}
.category-tile.selected{border-color:var(--blue);background:#172b47}
.marine-category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px;margin:14px 0 18px}
@media(max-width:600px){.word-grid{grid-template-columns:1fr}.phrase-modal-box{padding:20px}.phrase-modal-en{font-size:24px}.phrase-modal-ru{font-size:19px}}

.word-card.favorite{border-color:#ffd074}
#modalFavBtn{min-width:145px}

.question-card{max-width:900px}.q-feedback{display:none;margin-top:15px;padding:14px;border-radius:12px;border:1px solid var(--line);line-height:1.55}.q-feedback.ok,.q-feedback.bad{display:block}.q-feedback.ok{background:#0f3028;border-color:#2f8a6b}.q-feedback.bad{background:#351b24;border-color:#a84c60}.q-feedback-title{font-size:17px;font-weight:900;margin-bottom:7px}.q-why{margin-top:8px;color:#d3deed}.choice:disabled{cursor:default;opacity:1}

.offline-status{display:inline-flex;align-items:center;gap:5px;font-size:11px;color:#63d6a4;border:1px solid #2f5d50;background:#10291f;padding:6px 8px;border-radius:999px;white-space:nowrap}
.offline-status.is-offline{color:#ffd074;border-color:#705a2e;background:#2b2413}
@media(max-width:650px){.offline-status{font-size:10px}}