:root{
  --bg:#f6f7fb;--panel:#fff;--text:#172033;--muted:#6b7280;--line:#e5e7eb;
  --primary:#4f46e5;--primary2:#eef2ff;--good:#0f9f6e;--warn:#c97a00;--danger:#c2414b;
  --shadow:0 12px 30px rgba(15,23,42,.08);--radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;line-height:1.55}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.topbar{height:86px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.92);position:sticky;top:0;z-index:30;backdrop-filter:blur(12px)}
.brand{display:flex;align-items:center;gap:14px}.brand h1{font-size:20px;margin:0}.brand p{margin:2px 0 0;color:var(--muted);font-size:13px}.logo{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#4f46e5,#7c3aed);color:#fff;display:grid;place-items:center;font-weight:800;box-shadow:var(--shadow)}
.top-actions{display:flex;gap:10px}.btn{border:0;border-radius:11px;padding:10px 14px;font-weight:700}.btn.primary{background:var(--primary);color:#fff}.btn.secondary{background:#fff;border:1px solid var(--line);color:var(--text)}.btn.tiny{padding:7px 9px;font-size:12px}.btn.full{width:100%;display:block;text-align:center}.btn.danger{color:var(--danger)}.btn.ghost{background:transparent;border:1px dashed #f1b2b8}.btn:hover{transform:translateY(-1px)}
.layout{display:grid;grid-template-columns:270px minmax(430px,1fr) 390px;gap:18px;max-width:1600px;margin:0 auto;padding:20px}
.sidebar,.detail-panel{position:sticky;top:106px;align-self:start;max-height:calc(100vh - 126px);overflow:auto}.panel,.stats,.detail-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 5px 18px rgba(15,23,42,.035)}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:1px;overflow:hidden;background:var(--line);margin-bottom:14px}.stat{background:var(--panel);padding:14px;text-align:center}.stat b{display:block;font-size:21px}.stat span{font-size:12px;color:var(--muted)}
.panel.compact{padding:14px;margin-bottom:14px}.label{font-size:12px;font-weight:800;color:#4b5563;display:block;margin-bottom:7px;text-transform:uppercase;letter-spacing:.04em}.input{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 11px;background:var(--panel);color:var(--text);outline:none}.input:focus{border-color:#a5b4fc;box-shadow:0 0 0 3px #eef2ff}.lesson-row{display:flex;gap:8px;margin-top:8px}.lesson-row .btn{flex:1}.filter-grid{display:flex;flex-wrap:wrap;gap:7px}.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 10px;font-size:12px}.chip.active{background:var(--primary2);border-color:#c7d2fe;color:#3730a3;font-weight:700}.stack{display:grid;gap:8px}.hint{font-size:12px;color:var(--muted);padding:0 4px}.hint kbd{background:#fff;border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:1px 5px}
.content{min-width:0}.list-head{display:flex;justify-content:space-between;align-items:end;margin:2px 2px 12px}.list-head h2{margin:0;font-size:22px}.list-head p{margin:4px 0 0;color:var(--muted);font-size:13px}.view-switch{display:flex;gap:5px}.icon-btn{width:36px;height:36px;border:1px solid var(--line);border-radius:9px;background:#fff}.icon-btn.active{background:var(--primary2);color:var(--primary);border-color:#c7d2fe}
.word-list{display:grid;gap:9px}.word-row{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px;display:grid;grid-template-columns:40px minmax(120px,1fr) minmax(130px,1.5fr) 72px;align-items:center;gap:12px;transition:.15s}.word-row:hover{border-color:#c7d2fe;box-shadow:0 6px 18px rgba(79,70,229,.07);transform:translateY(-1px)}.word-row.selected{border-color:#818cf8;box-shadow:0 0 0 2px #eef2ff}.word-index{color:#9ca3af;font-size:12px}.word-main{min-width:0}.word-title{display:flex;align-items:center;gap:7px}.word-title strong{font-size:18px;letter-spacing:.01em}.speaker-mini{border:0;background:transparent;font-size:16px;padding:2px}.word-sub{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.word-meaning{min-width:0}.word-meaning .zh{font-weight:650}.word-meaning .example-mini{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}.row-actions{display:flex;justify-content:flex-end;gap:5px}.row-actions button{border:0;background:transparent;border-radius:8px;padding:6px;font-size:16px}.row-actions button.on{background:#ecfdf5;color:var(--good)}.row-actions .fav.on{background:#fff7ed;color:#d97706}
.word-list.card-view{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}.card-view .word-row{display:block;min-height:150px}.card-view .word-index{float:right}.card-view .word-title{margin:6px 0}.card-view .word-meaning{margin-top:14px}.card-view .row-actions{margin-top:10px;justify-content:flex-start}
.detail-panel{padding:18px;min-height:480px}.empty-detail{text-align:center;color:var(--muted);padding:70px 20px}.empty-detail h3{color:var(--text)}.big-speaker{font-size:46px}.detail-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.detail-word{font-size:34px;margin:0;line-height:1.1}.detail-ipa{font-family:"Noto Sans",Arial,sans-serif;color:#4f46e5;font-size:16px;margin-top:6px}.pos-badge{display:inline-flex;background:#f3f4f6;color:#4b5563;border-radius:8px;padding:3px 7px;font-size:12px;font-weight:700}.speak-big{width:48px;height:48px;border-radius:14px;border:0;background:var(--primary2);font-size:22px}.detail-zh{font-size:20px;font-weight:750;margin:14px 0 4px}.priority-badge{font-size:11px;border-radius:999px;padding:4px 8px;background:#ecfdf5;color:#047857;font-weight:800}.detail-actions{display:flex;gap:8px;margin:14px 0}.detail-actions .btn{flex:1;font-size:13px;padding:9px}.section{border-top:1px solid var(--line);padding-top:14px;margin-top:14px}.section h4{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:#6b7280;margin:0 0 8px}.tokens{display:flex;gap:7px;flex-wrap:wrap}.token{background:#f8fafc;border:1px solid var(--line);border-radius:8px;padding:5px 8px;font-size:12px}.token.good{background:#ecfdf5;border-color:#bbf7d0}.token.bad{background:#fff1f2;border-color:#fecdd3}.example-box{background:#f8fafc;border-radius:13px;padding:12px;border:1px solid var(--line)}.example-en{font-size:16px;font-weight:650;display:flex;align-items:flex-start;justify-content:space-between;gap:8px}.example-zh{font-size:13px;color:var(--muted);margin-top:5px}.online-box{background:#fffbeb;border:1px solid #fde68a;border-radius:12px;padding:11px;font-size:12px;color:#854d0e}.online-def{margin-top:8px;color:var(--text)}.online-def ol{padding-left:18px;margin:6px 0}.note{width:100%;min-height:70px;resize:vertical;border:1px solid var(--line);border-radius:10px;padding:9px;background:var(--panel);color:var(--text)}
.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,15px);background:#111827;color:#fff;padding:10px 14px;border-radius:10px;opacity:0;pointer-events:none;transition:.2s;z-index:100;font-size:13px}.toast.show{opacity:1;transform:translate(-50%,0)}
footer{max-width:1600px;margin:0 auto;padding:8px 24px 28px;color:var(--muted);font-size:12px}
@media(max-width:1180px){.layout{grid-template-columns:240px 1fr}.detail-panel{position:fixed;right:14px;top:100px;bottom:14px;width:min(390px,calc(100vw - 28px));max-height:none;z-index:40;box-shadow:0 18px 50px rgba(15,23,42,.2);display:none}.detail-panel.open{display:block}}
@media(max-width:760px){.topbar{height:auto;padding:14px;align-items:flex-start}.brand p{display:none}.top-actions{display:none}.layout{display:block;padding:12px}.sidebar{position:static;max-height:none}.stats{grid-template-columns:repeat(4,1fr)}.stat{padding:10px 4px}.sidebar .panel:not(:nth-of-type(1)){display:none}.content{margin-top:14px}.word-row{grid-template-columns:32px 1fr 52px}.word-meaning{grid-column:2/4}.detail-panel{top:12px}.list-head{align-items:center}.word-list.card-view{grid-template-columns:1fr 1fr}}
@media(prefers-color-scheme:dark){:root{--bg:#0f172a;--panel:#111827;--text:#e5e7eb;--muted:#94a3b8;--line:#273449;--primary2:#23285f}.topbar{background:rgba(15,23,42,.9)}.btn.secondary,.chip,.icon-btn,.word-row{background:#111827}.input,.note{background:#0f172a}.example-box,.token{background:#0f172a}.online-box{background:#2b2410;color:#fde68a}}

/* V2 additions */
.main-tabs{display:flex;align-items:center;gap:5px;background:var(--bg);padding:4px;border:1px solid var(--line);border-radius:12px;margin-left:auto;margin-right:18px}.main-tab{border:0;background:transparent;color:var(--muted);padding:8px 16px;border-radius:9px;font-weight:800}.main-tab.active{background:var(--panel);color:var(--primary);box-shadow:0 2px 8px rgba(15,23,42,.07)}
.search-row{display:grid;grid-template-columns:1fr 38px;gap:7px}.micro-hint{font-size:11px;color:var(--muted);margin-top:7px;line-height:1.45}.plan-mini p{font-size:12px;color:var(--muted);margin:0 0 9px}.plan-mini p b{color:var(--text)}.mini-progress{height:7px;border-radius:999px;background:var(--bg);overflow:hidden;border:1px solid var(--line)}.mini-progress span{display:block;height:100%;width:0;background:var(--primary);transition:.2s}.plan-mini small{display:block;color:var(--muted);margin-top:6px}
.sense-card{background:#f8fafc;border:1px solid var(--line);border-radius:13px;padding:11px;margin-top:8px}.sense-head{display:flex;gap:7px;align-items:flex-start;margin-bottom:8px}.sense-num{width:22px;height:22px;display:grid;place-items:center;border-radius:7px;background:var(--primary2);color:var(--primary);font-size:11px;font-weight:900;flex:0 0 auto}.sense-zh{font-weight:750}.example-box+.example-box{margin-top:7px}.forms-box{background:#eef2ff;border:1px solid #c7d2fe;border-radius:12px;padding:10px;font-size:13px;color:#3730a3}.source-tag{font-size:10px;color:var(--muted);margin-left:6px}.custom-badge{font-size:10px;padding:3px 7px;border-radius:999px;background:#fff7ed;color:#b45309;font-weight:800}.add-empty{background:var(--panel);border:1px dashed #a5b4fc;border-radius:14px;padding:24px;text-align:center;color:var(--muted)}.add-empty b{color:var(--text)}

.grammar-layout{display:grid;grid-template-columns:270px minmax(430px,1fr) 390px;gap:18px;max-width:1600px;margin:0 auto;padding:20px}.grammar-sidebar,.grammar-detail{position:sticky;top:106px;align-self:start;max-height:calc(100vh - 126px);overflow:auto}.grammar-cats{display:flex;flex-wrap:wrap;gap:7px}.grammar-cat{border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:7px 10px;font-size:12px}.grammar-cat.active{background:var(--primary2);border-color:#c7d2fe;color:#3730a3;font-weight:750}.grammar-list{display:grid;gap:9px}.grammar-row{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px;display:grid;grid-template-columns:42px 1fr 32px;gap:12px;align-items:start;transition:.15s}.grammar-row:hover{border-color:#c7d2fe;box-shadow:0 6px 18px rgba(79,70,229,.07);transform:translateY(-1px)}.grammar-row.selected{border-color:#818cf8;box-shadow:0 0 0 2px #eef2ff}.grammar-index{width:32px;height:32px;border-radius:10px;background:var(--primary2);color:var(--primary);display:grid;place-items:center;font-weight:900;font-size:12px}.grammar-row h3{font-size:16px;margin:0 0 3px}.grammar-row p{font-size:12px;color:var(--muted);margin:0}.grammar-category{display:inline-block;font-size:10px;color:#6d28d9;background:#f5f3ff;border-radius:999px;padding:2px 7px;margin-top:7px}.grammar-check{border:0;background:transparent;font-size:18px;color:#9ca3af}.grammar-check.on{color:var(--good)}.grammar-rule{font-size:14px;line-height:1.75;background:#f8fafc;border:1px solid var(--line);border-radius:13px;padding:12px}.pattern-grid{display:grid;gap:6px}.pattern{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#eef2ff;border:1px solid #c7d2fe;color:#3730a3;border-radius:9px;padding:7px 9px;font-size:12px}.tip-box{background:#fffbeb;border:1px solid #fde68a;border-radius:12px;padding:10px;font-size:12px;color:#854d0e}.grammar-example{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:10px;margin-top:7px}.grammar-example-en{display:flex;justify-content:space-between;gap:8px;font-weight:650}.grammar-example-zh{font-size:12px;color:var(--muted);margin-top:4px}

.overlay{position:fixed;inset:0;background:rgba(15,23,42,.55);backdrop-filter:blur(5px);z-index:200;padding:24px;overflow:auto}.overlay[hidden]{display:none}.study-shell,.modal-shell{max-width:930px;min-height:620px;margin:0 auto;background:var(--panel);border:1px solid var(--line);border-radius:24px;box-shadow:0 30px 80px rgba(15,23,42,.28);overflow:hidden}.study-header,.modal-head{display:flex;justify-content:space-between;align-items:center;padding:22px 26px 16px}.study-header h2,.modal-head h2{margin:2px 0 0}.eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:.08em;font-weight:900;color:var(--primary)}.study-header-right{display:flex;align-items:center;gap:9px}.counter-pill{font-size:12px;font-weight:800;border:1px solid var(--line);border-radius:999px;padding:6px 10px}.study-progress{height:5px;background:var(--bg)}.study-progress span{display:block;height:100%;width:0;background:var(--primary);transition:.2s}.study-body{padding:30px;max-width:780px;margin:0 auto}.learn-card{text-align:left}.learn-word-row{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.learn-word{font-size:50px;line-height:1.05;margin:0}.learn-ipa{color:var(--primary);margin-top:7px}.learn-zh{font-size:25px;font-weight:800;margin:18px 0 10px}.learn-senses{display:grid;gap:9px}.study-nav{display:flex;justify-content:space-between;gap:10px;margin-top:24px}.study-nav .right{margin-left:auto;display:flex;gap:9px}.test-prompt{max-width:680px;margin:0 auto}.test-badge{font-size:12px;color:var(--muted);margin-bottom:12px}.prompt-card{background:#f8fafc;border:1px solid var(--line);border-radius:18px;padding:18px;margin-bottom:14px}.prompt-card h3{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin:0 0 7px}.prompt-zh{font-size:21px;font-weight:800}.test-grid{display:grid;grid-template-columns:2fr 1fr;gap:10px}.test-grid label,.test-sentence label{font-size:12px;font-weight:750;color:var(--muted)}.test-grid input,.test-sentence textarea{margin-top:6px}.test-sentence{margin-top:13px}.test-sentence textarea{min-height:92px;resize:vertical}.answer-box{margin-top:14px;background:#fff7ed;border:1px solid #fed7aa;border-radius:14px;padding:13px}.answer-box b{color:#9a3412}.test-actions{display:flex;gap:9px;align-items:center;margin-top:18px}.test-actions .spacer{flex:1}.feedback{margin-top:12px;border-radius:12px;padding:10px 12px;font-size:13px}.feedback.bad{background:#fff1f2;color:#9f1239;border:1px solid #fecdd3}.feedback.good{background:#ecfdf5;color:#047857;border:1px solid #bbf7d0}.finish-card{text-align:center;padding:55px 10px}.finish-icon{font-size:58px}.finish-card h2{font-size:30px}.finish-card p{color:var(--muted)}.finish-stats{display:flex;justify-content:center;gap:12px;margin:20px 0}.finish-stat{background:#f8fafc;border:1px solid var(--line);border-radius:14px;padding:12px 18px}.finish-stat b{display:block;font-size:22px}.finish-stat span{font-size:11px;color:var(--muted)}

.add-shell{max-width:760px;min-height:0;padding-bottom:22px}.add-query-row{display:grid;grid-template-columns:1fr 120px;gap:9px;padding:0 26px}.lookup-status{font-size:12px;color:var(--muted);padding:8px 26px 0}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:18px 26px 0}.form-grid label,.form-label{font-size:12px;font-weight:800;color:var(--muted)}.form-grid input,.form-label input{display:block;margin-top:5px}.form-label{display:block;margin:12px 26px 0}.lookup-preview{margin:16px 26px 0;background:#f8fafc;border:1px solid var(--line);border-radius:14px;padding:12px;font-size:12px;max-height:180px;overflow:auto}.lookup-preview:empty{display:none}.modal-actions{display:flex;justify-content:flex-end;padding:16px 26px 0}.lookup-def{margin:7px 0}.lookup-def b{color:var(--primary)}

@media(max-width:1180px){.grammar-layout{grid-template-columns:240px 1fr}.grammar-detail{position:fixed;right:14px;top:100px;bottom:14px;width:min(390px,calc(100vw - 28px));max-height:none;z-index:40;box-shadow:0 18px 50px rgba(15,23,42,.2);display:none}.grammar-detail.open{display:block}.main-tabs{margin-left:auto}}
@media(max-width:900px){.main-tabs{order:3;width:100%;margin:10px 0 0}.topbar{flex-wrap:wrap;height:auto}.main-tab{flex:1}.grammar-layout{display:block;padding:12px}.grammar-sidebar{position:static;max-height:none}.grammar-content{margin-top:14px}.overlay{padding:8px}.study-body{padding:20px}.learn-word{font-size:42px}}
@media(max-width:760px){.top-actions{display:none!important}.main-tabs{display:flex}.test-grid,.form-grid{grid-template-columns:1fr}.study-shell{min-height:calc(100vh - 16px);border-radius:18px}.study-header{padding:16px}.study-body{padding:16px}.learn-word{font-size:38px}.study-nav{flex-wrap:wrap}.add-query-row{grid-template-columns:1fr;padding:0 16px}.lookup-status,.form-grid,.modal-actions{padding-left:16px;padding-right:16px}.form-label,.lookup-preview{margin-left:16px;margin-right:16px}.grammar-stats{grid-template-columns:repeat(4,1fr)}}
@media(prefers-color-scheme:dark){.sense-card,.grammar-rule,.grammar-example,.prompt-card,.finish-stat,.lookup-preview{background:#0f172a}.forms-box,.pattern{background:#23285f;color:#c7d2fe;border-color:#3730a3}.main-tab.active{background:#111827}.answer-box{background:#2c2016}.tip-box{background:#2b2410;color:#fde68a}}

/* SpMM 40-day additions */
.source-box{background:#f0fdf4;border:1px solid #bbf7d0;border-radius:13px;padding:12px}.source-meta{font-size:11px;color:#047857;font-weight:800;margin-bottom:7px}.source-note{font-size:12px;color:var(--muted);margin-top:7px}.category-badge{display:inline-flex;border-radius:999px;padding:3px 8px;background:#eff6ff;color:#1d4ed8;font-size:10px;font-weight:800}.grammar-qa{background:#eef2ff;border:1px solid #c7d2fe;border-radius:13px;padding:11px}.grammar-qa .speaker-mini{float:right}.grammar-practice{background:#f8fafc;border:1px solid var(--line);border-radius:13px;padding:12px}.grammar-practice textarea{width:100%;min-height:90px;margin-top:8px;border:1px solid var(--line);border-radius:10px;padding:10px;background:var(--panel);color:var(--text);resize:vertical}.practice-actions{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}.practice-feedback{font-size:12px;margin-top:8px}.paper-chip{font-size:10px;border:1px solid #bbf7d0;background:#f0fdf4;color:#047857;border-radius:999px;padding:3px 7px}.quiz-source{font-size:11px;color:var(--muted);margin-top:6px}.paper-sentence{font-family:Georgia,"Times New Roman",serif;line-height:1.7}.day-pill{font-size:10px;padding:3px 7px;border-radius:999px;background:#f5f3ff;color:#6d28d9;font-weight:800}
@media(prefers-color-scheme:dark){.source-box{background:#10261f;border-color:#14532d}.source-meta{color:#86efac}.grammar-qa{background:#23285f}.grammar-practice{background:#0f172a}.paper-chip{background:#10261f;border-color:#14532d;color:#86efac}}