:root, [data-theme="light"] {
  --p: #4c63e8;
  --p2: #4c6ef5;
  --p-soft: #edf2ff;
  --sec: #0c8599;
  --ok: #2f9e44;
  --warn: #e67700;
  --bad: #e03131;
  --bg: #f5f6f8;
  --card: #ffffff;
  --elev: #eef0f4;
  --line: #e2e5eb;
  --txt: #1a1d26;
  --mut: #6b7280;
  --r: 12px;
  --rs: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 12px rgba(0,0,0,.04);
  --font: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --safe-b: env(safe-area-inset-bottom, 0px);
}
[data-theme="dark"] {
  --p: #748ffc;
  --p2: #91a7ff;
  --p-soft: #1e2a4a;
  --sec: #3bc9db;
  --ok: #51cf66;
  --warn: #ffc078;
  --bad: #ff6b6b;
  --bg: #12141a;
  --card: #1a1d26;
  --elev: #252833;
  --line: #2e323c;
  --txt: #eef0f4;
  --mut: #9ca3af;
  --shadow: 0 1px 3px rgba(0,0,0,.3), 0 4px 12px rgba(0,0,0,.2);
}
[data-theme="ocean"] {
  --p: #1c7ed6;
  --p2: #339af0;
  --p-soft: #e7f5ff;
  --sec: #12b886;
  --ok: #2f9e44;
  --warn: #f08c00;
  --bad: #e03131;
  --bg: #eaf6fb;
  --card: #ffffff;
  --elev: #d6eef7;
  --line: #b6dcec;
  --txt: #0b2e3f;
  --mut: #4a6b7c;
  --shadow: 0 1px 3px rgba(12,80,110,.08), 0 4px 12px rgba(12,80,110,.06);
}
[data-theme="forest"] {
  --p: #2f9e44;
  --p2: #40c057;
  --p-soft: #ebfbee;
  --sec: #0c8599;
  --ok: #2b8a3e;
  --warn: #e67700;
  --bad: #c92a2a;
  --bg: #f1f8f2;
  --card: #ffffff;
  --elev: #e0efe3;
  --line: #c5dbc9;
  --txt: #1b2e1f;
  --mut: #5a7260;
  --shadow: 0 1px 3px rgba(30,80,40,.07), 0 4px 12px rgba(30,80,40,.05);
}
[data-theme="sunset"] {
  --p: #e8590c;
  --p2: #fd7e14;
  --p-soft: #fff4e6;
  --sec: #d6336c;
  --ok: #2f9e44;
  --warn: #f08c00;
  --bad: #c92a2a;
  --bg: #fff8f1;
  --card: #ffffff;
  --elev: #ffe8d1;
  --line: #f5d0b0;
  --txt: #3b1f0b;
  --mut: #8a5a3a;
  --shadow: 0 1px 3px rgba(120,50,10,.08), 0 4px 12px rgba(120,50,10,.05);
}
[data-theme="lavender"] {
  --p: #7048e8;
  --p2: #845ef7;
  --p-soft: #f3f0ff;
  --sec: #d6336c;
  --ok: #2f9e44;
  --warn: #e67700;
  --bad: #e03131;
  --bg: #f7f5fc;
  --card: #ffffff;
  --elev: #ebe4fa;
  --line: #d5c9f0;
  --txt: #2a1f45;
  --mut: #6b5f85;
  --shadow: 0 1px 3px rgba(70,40,140,.07), 0 4px 12px rgba(70,40,140,.05);
}
[data-theme="slate"] {
  --p: #495057;
  --p2: #868e96;
  --p-soft: #f1f3f5;
  --sec: #1098ad;
  --ok: #2f9e44;
  --warn: #e67700;
  --bad: #e03131;
  --bg: #f1f3f5;
  --card: #ffffff;
  --elev: #e9ecef;
  --line: #dee2e6;
  --txt: #212529;
  --mut: #868e96;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 12px rgba(0,0,0,.04);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--txt);
  line-height:1.6;
  min-height:100dvh;
  overflow-x:hidden;
  font-size:16px;
}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
a{color:var(--p)}
h1{font-size:1.5rem;font-weight:800;letter-spacing:-0.015em;margin-bottom:.3rem}
h2{font-size:1.15rem;font-weight:700;letter-spacing:-0.01em;margin-bottom:.3rem}

.app{max-width:960px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column}

.header{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  gap:.75rem;padding:.65rem 1rem;
  background:color-mix(in srgb,var(--bg) 92%,transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.logo{display:flex;align-items:center;gap:.55rem;font-weight:700;font-size:1.05rem;transition:opacity .15s}
.logo:hover{opacity:.85}
.logo-text{letter-spacing:-0.015em;font-weight:800}
.logo-mark{
  width:32px;height:32px;border-radius:8px;
  background:var(--p);
  display:grid;place-items:center;color:#fff;font-weight:700;font-size:.95rem;
}
.header-right{display:flex;align-items:center;gap:.45rem}
.xp-pill{
  font-size:.78rem;font-weight:600;padding:.3rem .65rem;
  border-radius:999px;background:var(--elev);color:var(--warn);
}
.icon-btn{
  width:36px;height:36px;border-radius:9px;
  background:var(--elev);display:grid;place-items:center;font-size:1rem;
  transition:.15s;
}
.icon-btn:hover{background:var(--line)}

.top-nav{
  display:flex;gap:.25rem;padding:.4rem .75rem;
  overflow-x:auto;scrollbar-width:none;
  border-bottom:1px solid var(--line);
  position:sticky;top:53px;z-index:40;background:var(--bg);
}
.top-nav::-webkit-scrollbar{display:none}
.nav-item{
  flex-shrink:0;padding:.4rem .85rem;border-radius:999px;
  color:var(--mut);font-weight:500;font-size:.875rem;transition:.15s;
}
.nav-item:hover{color:var(--txt);background:var(--elev)}
.nav-item.active{background:var(--p);color:#fff;box-shadow:0 2px 8px color-mix(in srgb,var(--p) 40%,transparent)}

.main{flex:1;padding:1rem 1rem 5.8rem}

.bottom-nav{
  display:none;position:fixed;bottom:0;left:0;right:0;z-index:50;
  background:color-mix(in srgb,var(--bg) 94%,transparent);
  backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
  padding:.25rem .15rem calc(.25rem + var(--safe-b));
  justify-content:space-around;
}
.bnav-item{
  flex:1;min-width:0;display:flex;flex-direction:column;align-items:center;gap:.05rem;
  color:var(--mut);font-size:.6rem;padding:.28rem .1rem;border-radius:8px;
}
.bnav-item span{font-size:1.1rem;line-height:1}
.bnav-item small{overflow:hidden;text-overflow:ellipsis;max-width:100%;white-space:nowrap}
.bnav-item.active{color:var(--p)}

.card{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r);padding:1rem;box-shadow:var(--shadow);
  transition:box-shadow .18s,border-color .18s,transform .18s;
}
.card-click{cursor:pointer;transition:.18s;text-align:left;width:100%}
.card-click:hover{border-color:color-mix(in srgb,var(--p) 40%,var(--line));background:color-mix(in srgb,var(--p) 3%,var(--card));transform:translateY(-1px);box-shadow:0 4px 16px rgba(0,0,0,.08),var(--shadow)}
.card-click:active{transform:translateY(0)}
.grid{display:grid;gap:.75rem}
.grid-2{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}

.hero{
  background:linear-gradient(155deg,color-mix(in srgb,var(--p) 9%,var(--card)),var(--card) 60%);
  border:1px solid var(--line);
  border-radius:var(--r);padding:1.35rem 1.15rem;margin-bottom:1rem;
  box-shadow:var(--shadow);
  position:relative;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;top:-40%;right:-15%;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,color-mix(in srgb,var(--p) 16%,transparent),transparent 70%);
  pointer-events:none;
}
.hero h1{font-size:clamp(1.25rem,3vw,1.55rem);font-weight:800;letter-spacing:-0.015em;margin-bottom:.35rem;color:var(--txt)}
.hero p{color:var(--mut);max-width:34rem;margin-bottom:.9rem;font-size:.95rem;position:relative}
.hero-stats{display:flex;flex-wrap:wrap;gap:.5rem;position:relative}
.stat-chip{
  background:var(--elev);
  padding:.4rem .7rem;border-radius:8px;font-size:.82rem;color:var(--mut);
  transition:transform .15s;
}
.stat-chip b{display:block;font-size:1.15rem;color:var(--txt);font-weight:700}

.h-sec{font-size:1rem;font-weight:700;letter-spacing:-0.01em;margin:1rem 0 .55rem;color:var(--txt)}
.muted{color:var(--mut)}
.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:.9rem}
.mt-1{margin-top:.5rem}.mt-2{margin-top:.9rem}
.flex{display:flex}.gap-1{gap:.45rem}.gap-2{gap:.75rem}
.items-center{align-items:center}.justify-between{justify-content:space-between}
.flex-wrap{flex-wrap:wrap}.text-center{text-align:center}
.w-full{width:100%}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.3rem;
  padding:.6rem 1.05rem;border-radius:10px;font-weight:600;font-size:.9rem;
  transition:.15s;
}
.btn-p{background:var(--p);color:#fff;box-shadow:0 2px 10px color-mix(in srgb,var(--p) 35%,transparent)}
.btn-p:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-p:active{transform:translateY(0);filter:brightness(0.98)}
.btn-s{background:var(--elev);color:var(--txt)}
.btn-s:hover{filter:brightness(.97)}
.btn-ghost{border:1px solid var(--line);color:var(--mut)}
.btn-sm{padding:.35rem .7rem;font-size:.8rem;border-radius:8px}
.btn-block{width:100%}
button:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--p);outline-offset:2px;border-radius:6px}

.badge{
  display:inline-block;font-size:.68rem;font-weight:650;padding:.15rem .45rem;
  border-radius:5px;letter-spacing:.02em;
}
.b-A1,.b-Beginner{background:#d3f9d8;color:#2b8a3e}
.b-A2{background:#c3fae8;color:#087f5b}
.b-B1,.b-Intermediate{background:#fff3bf;color:#e67700}
.b-B2{background:#ffe8cc;color:#d9480f}
.b-C1,.b-Advanced{background:#ffe3e3;color:#c92a2a}
.b-C2{background:#e5dbff;color:#5f3dc4}
[data-theme="dark"] .b-A1,[data-theme="dark"] .b-Beginner{background:#1b3d28;color:#8ce99a}
[data-theme="dark"] .b-A2{background:#0b3d36;color:#63e6be}
[data-theme="dark"] .b-B1,[data-theme="dark"] .b-Intermediate{background:#3d2e0b;color:#ffc078}
[data-theme="dark"] .b-B2{background:#3d1f0b;color:#ffa94d}
[data-theme="dark"] .b-C1,[data-theme="dark"] .b-Advanced{background:#3d1212;color:#ffa8a8}
[data-theme="dark"] .b-C2{background:#2b1c4a;color:#b197fc}

.bar{height:7px;background:var(--elev);border-radius:99px;overflow:hidden}
.bar > i{display:block;height:100%;background:var(--p);border-radius:99px;transition:width .35s}

.search-wrap{position:relative;margin-bottom:.75rem}
.search-wrap input{
  width:100%;padding:.7rem 1rem .7rem 2.5rem;
  border-radius:10px;border:1px solid var(--line);
  background:var(--card);outline:none;
}
.search-wrap input:focus{border-color:var(--p);box-shadow:0 0 0 3px color-mix(in srgb,var(--p) 18%,transparent)}
.search-wrap .si{position:absolute;left:.85rem;top:50%;transform:translateY(-50%);opacity:.5}

.chips{display:flex;flex-wrap:wrap;gap:.35rem;margin-bottom:.75rem}
.chip{
  padding:.3rem .65rem;border-radius:999px;font-size:.8rem;font-weight:500;
  background:var(--elev);color:var(--mut);border:1px solid transparent;
}
.chip.on{background:var(--p);color:#fff}

.back{
  display:inline-flex;align-items:center;gap:.25rem;
  color:var(--mut);font-size:.88rem;margin-bottom:.5rem;padding:.15rem 0;
}
.back:hover{color:var(--p)}
.section{margin-bottom:1.25rem}
.section h3{font-size:.98rem;color:var(--p);margin-bottom:.4rem;font-weight:650}
.ex{
  background:var(--elev);border-left:3px solid var(--p);
  padding:.6rem .85rem;border-radius:0 8px 8px 0;margin:.35rem 0;font-size:.93rem;
}
.ex small{display:block;color:var(--mut);font-size:.8rem;margin-top:.15rem}
.tips{
  background:color-mix(in srgb,var(--warn) 8%,var(--card));
  border:1px solid color-mix(in srgb,var(--warn) 22%,var(--line));
  border-radius:var(--rs);padding:.85rem;
}
.tips h4{color:var(--warn);margin-bottom:.35rem;font-size:.92rem}
.tips ul{padding-left:1.1rem}
.tips li{margin-bottom:.2rem;font-size:.92rem}

.q-card{max-width:540px;margin:0 auto}
.q-meta{display:flex;justify-content:space-between;color:var(--mut);font-size:.85rem;margin-bottom:.65rem}
.q-text{font-size:1.1rem;font-weight:600;margin-bottom:1rem;line-height:1.45}
.opts{display:flex;flex-direction:column;gap:.5rem}
.opt{
  text-align:left;padding:.75rem .95rem;border-radius:10px;
  border:1.5px solid var(--line);background:var(--card);transition:.12s;
}
.opt:hover:not(:disabled){border-color:var(--p);background:color-mix(in srgb,var(--p) 6%,var(--card))}
.opt.right{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 12%,var(--card))}
.opt.wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 10%,var(--card))}
.opt:disabled{cursor:default}
.fb{margin-top:.85rem;padding:.7rem;border-radius:8px;text-align:center;font-weight:600;font-size:.92rem}
.fb.ok{background:color-mix(in srgb,var(--ok) 12%,var(--card));color:var(--ok)}
.fb.no{background:color-mix(in srgb,var(--bad) 10%,var(--card));color:var(--bad)}
.fb-explain{margin-top:.4rem;font-weight:400;font-size:.85rem;line-height:1.4;color:var(--text);opacity:.85;text-align:left}
.tbl-wrap table{width:100%}
.tbl-wrap th,.tbl-wrap td{text-align:left;padding:.35rem .5rem;border-bottom:1px solid var(--line)}
.score-big{font-size:2.8rem;font-weight:800;text-align:center;color:var(--p)}

.words{display:flex;flex-wrap:wrap;gap:.4rem;min-height:44px;padding:.55rem;
  background:var(--elev);border-radius:8px;border:1.5px dashed var(--line);margin:.65rem 0}
.chip-w{
  padding:.35rem .65rem;background:var(--p);color:#fff;border-radius:7px;
  font-weight:500;user-select:none;font-size:.9rem;
}
.chip-w.dim{opacity:.3;pointer-events:none}
.drop{
  min-height:46px;padding:.55rem;border:1.5px solid var(--line);border-radius:8px;
  display:flex;flex-wrap:wrap;gap:.3rem;margin-bottom:.65rem;background:var(--card);
}
.fill-in{
  width:100%;padding:.7rem .9rem;border-radius:10px;border:1.5px solid var(--line);
  background:var(--card);margin:.65rem 0;outline:none;
}
.fill-in:focus{border-color:var(--p)}

.tbl-wrap{overflow-x:auto;border-radius:var(--rs);border:1px solid var(--line)}
table{width:100%;border-collapse:collapse;font-size:.88rem}
th,td{padding:.5rem .65rem;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--elev);font-weight:600}
tr:hover td{background:color-mix(in srgb,var(--p) 4%,transparent)}

.flash{
  min-height:160px;display:flex;align-items:center;justify-content:center;
  text-align:center;font-size:1.15rem;font-weight:600;cursor:pointer;
}
.flash .inner{padding:1rem}

.toast{
  position:fixed;bottom:4.5rem;left:50%;transform:translateX(-50%) translateY(120px);
  background:var(--card);border:1px solid var(--line);padding:.65rem 1.1rem;
  border-radius:10px;box-shadow:var(--shadow);z-index:200;font-weight:500;
  transition:transform .28s;pointer-events:none;max-width:90vw;font-size:.9rem;
}
.toast.show{transform:translateX(-50%) translateY(0)}

.empty{text-align:center;padding:2.2rem 1rem;color:var(--mut)}
.empty .e{font-size:2.2rem;margin-bottom:.5rem}

.ticon{
  width:40px;height:40px;border-radius:10px;display:grid;place-items:center;
  font-size:1.25rem;background:var(--elev);margin-bottom:.45rem;
}

.tour-overlay{
  position:fixed;inset:0;z-index:300;background:rgba(0,0,0,.45);
  display:flex;align-items:flex-end;justify-content:center;padding:1rem;
}
.tour-card{
  background:var(--card);border-radius:14px;padding:1.25rem;
  max-width:380px;width:100%;box-shadow:0 12px 40px rgba(0,0,0,.2);
  margin-bottom:3.5rem;
}
.tour-card h2{font-size:1.15rem;margin-bottom:.4rem}
.tour-card p{color:var(--mut);font-size:.92rem;margin-bottom:1rem}
.tour-dots{display:flex;gap:.3rem;justify-content:center;margin-bottom:.85rem}
.tour-dot{width:7px;height:7px;border-radius:50%;background:var(--line)}
.tour-dot.on{background:var(--p)}
.tour-actions{display:flex;gap:.5rem;justify-content:space-between}

.theme-label{
  font-size:.75rem;color:var(--mut);text-align:center;margin-top:.25rem;
}

.hidden{display:none!important}
.view{animation:in .2s ease}
@keyframes in{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

@media(max-width:768px){
  .top-nav{display:none}
  .bottom-nav{display:flex}
  .main{padding:.9rem .9rem 5.5rem}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .grid-2.keep-2{grid-template-columns:1fr 1fr}
}
@media(min-width:769px){
  .bottom-nav{display:none!important}
  .main{padding:1.15rem 1.35rem 1.75rem}
}

.logo-mark{width:32px;height:32px;padding:0;background:transparent;display:grid;place-items:center;overflow:hidden}
.logo-mark svg{display:block;width:32px;height:32px}
.logo-lg{width:72px!important;height:72px!important;margin:0 auto 1rem}
.logo-lg svg{width:72px;height:72px}
.game-card{border-color:color-mix(in srgb,var(--sec) 35%,var(--line))}
.game-card .badge{display:inline-block}