:root{--primary:#4f46e5;--primary-dark:#3730a3;--primary-soft:#eef2ff;--ink:#172033;--muted:#667085;--line:#e4e7ec;--bg:#f5f7fb;--card:#fff;--green:#087f5b;--green-soft:#e9f8f1;--amber:#b86809;--amber-soft:#fff5e5;--shadow:0 10px 35px rgba(30,45,90,.07);--radius:20px;font-family:Inter,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 50% -10%,#eef1ff 0,transparent 34%),var(--bg);font-size:16px}button,select,textarea,input{font:inherit}button{touch-action:manipulation}.hidden{display:none!important}
.topbar{height:72px;position:sticky;top:0;z-index:20;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:24px;padding:0 26px;background:#ffffffed;border-bottom:1px solid #e7e9f1;backdrop-filter:blur(14px)}.brand{display:flex;align-items:center;gap:11px;min-width:max-content}.brand-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:linear-gradient(145deg,#635bff,var(--primary-dark));box-shadow:0 7px 18px #4f46e538;color:#fff;font-weight:850;font-size:19px}.brand strong,.brand small{display:block}.brand strong{font-size:17px}.brand small{color:#7a8498;font-size:11px;margin-top:3px}.version{margin-left:4px;color:var(--primary);font-weight:800}.journey{justify-self:center;display:flex;align-items:center;gap:10px;color:#8b93a4;font-size:12px;font-weight:700}.journey span{padding:7px 10px;border-radius:99px}.journey span.active{color:var(--primary);background:var(--primary-soft)}.journey i{width:24px;height:1px;background:#d6d9e2}.top-actions{display:flex;align-items:center;gap:6px}.icon-btn{min-width:48px;height:48px;border:0;background:transparent;border-radius:12px;color:#475467;display:grid;place-items:center;padding:4px 8px;cursor:pointer}.icon-btn span{font-size:18px;line-height:18px}.icon-btn small{font-size:10px;margin-top:2px}.icon-btn:hover{background:#f1f3f8}.ai-status{display:flex;align-items:center;gap:7px;border:1px solid #e0e4ec;background:#fff;color:#667085;border-radius:99px;padding:8px 11px;font-size:12px;font-weight:750;cursor:pointer}.ai-status i{width:8px;height:8px;background:#f59e0b;border-radius:50%;box-shadow:0 0 0 3px #fef3c7}.ai-status.connected{color:var(--green);border-color:#ccebdd;background:#f7fffb}.ai-status.connected i{background:#10b981;box-shadow:0 0 0 3px #d1fae5}
.app-shell{max-width:1650px;margin:auto;padding:20px;display:grid;grid-template-columns:330px minmax(440px,1fr) 390px;gap:18px;align-items:start}.left-column,.right-column{display:grid;gap:16px;position:sticky;top:92px;max-height:calc(100vh - 110px);overflow:auto;padding:1px 2px 4px;scrollbar-width:thin;scrollbar-color:#c8ceda transparent}.card{background:var(--card);border:1px solid #e2e6ee;border-radius:var(--radius);box-shadow:var(--shadow)}.topic-card,.outline-card,.feedback-card{padding:20px}
.section-title,.section-title>div,.section-heading,.editor-title{display:flex;align-items:center;gap:10px}.section-title{justify-content:space-between;margin-bottom:16px}.section-title h2,.section-heading h2{font-size:16px;margin:0}.section-title p,.section-heading p{font-size:12px;color:#8a94a7;margin:3px 0 0}.step-icon{display:grid;place-items:center;flex:0 0 auto;width:29px;height:29px;border-radius:10px;background:var(--primary-soft);color:var(--primary);font-weight:850;font-size:13px}.surprise-btn{border:0;border-radius:9px;background:#f3f1ff;color:var(--primary);font-size:11px;font-weight:800;padding:8px 9px;cursor:pointer}.surprise-btn:hover{background:#e8e5ff}
.filter-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}.filter-grid label:first-child{grid-column:1/-1}.filter-grid label,.modal label,.topic-label{font-size:12px;font-weight:750;color:#536078;display:grid;gap:6px}.filter-grid select,.modal select,.modal input,.modal textarea,.topic-label select{width:100%;border:1px solid #d6dce7;background:#fff;border-radius:11px;padding:10px 11px;color:var(--ink);outline:none;transition:.18s}.filter-grid select:focus,.modal input:focus,.modal textarea:focus,.topic-label select:focus{border-color:#8b86ef;box-shadow:0 0 0 3px #4f46e514}.topic-label{margin-top:10px}.topic-label select{font-weight:700}.text-btn{border:0;background:transparent;color:var(--primary);font-weight:750;font-size:12px;padding:11px 0 0;cursor:pointer}.topic-meta{display:flex;gap:6px;flex-wrap:wrap;margin:14px 0 10px}.topic-meta span{padding:6px 9px;border-radius:99px;font-size:11px;font-weight:800;background:var(--primary-soft);color:var(--primary)}.topic-meta span:nth-child(2){background:var(--green-soft);color:var(--green)}.topic-meta span:nth-child(3){background:var(--amber-soft);color:#946012}.prompt-box{border:1px solid #e1e5ef;background:linear-gradient(145deg,#fbfcff,#f7f8ff);border-radius:14px;padding:14px}.prompt-box>small{font-size:9px;letter-spacing:.12em;color:#939bad;font-weight:850}.prompt{line-height:1.55;margin:7px 0 12px;color:#2d3850;font-size:14px}.target{padding-top:11px;border-top:1px solid #e8eaf1;color:#657189;font-size:12px;display:flex;align-items:center;justify-content:space-between;gap:8px}.target b{color:var(--primary)}.target button{border:0;background:var(--primary);color:#fff;border-radius:8px;padding:7px 9px;font-size:11px;font-weight:800;cursor:pointer}
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.result-card{overflow:hidden}.score-head{background:linear-gradient(135deg,#302a8f,#4f46e5);color:#fff;padding:20px;display:grid;grid-template-columns:1fr auto;gap:6px}.score-head small{display:block;color:#ffffffb8}.score-head strong{font-size:38px}.score-head em{font-size:14px;color:#ffffff99;font-style:normal}.score-head>span{align-self:center;background:#ffffff1f;border:1px solid #ffffff24;border-radius:10px;padding:8px 11px;font-weight:850}.score-track{grid-column:1/-1;height:7px;border-radius:9px;background:#ffffff25;overflow:hidden;margin-top:6px}.score-track i{display:block;height:100%;background:#a8f0d3;width:0;transition:width .5s}.tabs{display:grid;grid-template-columns:repeat(3,1fr);margin:15px 15px 0;background:#f1f3f7;border-radius:10px;padding:3px}.tabs button{border:0;background:transparent;padding:8px 4px;border-radius:8px;color:#6e788b;font-size:11px;cursor:pointer}.tabs button.active{background:#fff;color:var(--ink);font-weight:750;box-shadow:0 1px 5px #243f9b1c}.tab-panel{padding:17px;font-size:13px;line-height:1.55}.tab-panel>p{color:#5d687e}.tab-panel h3{font-size:13px;margin:17px 0 6px;color:var(--green)}.tab-panel h3.amber{color:var(--amber)}.tab-panel ul{margin:0;padding-left:19px;color:#536078}.correction{border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:9px}.correction del{display:block;color:#b54752}.correction ins{display:block;color:var(--green);font-weight:750;text-decoration:none;margin:6px 0}.correction small{color:#6c7890}.rewrite{white-space:pre-wrap;background:#f6f7fa;border-radius:12px;padding:14px;max-height:500px;overflow:auto;line-height:1.75}.copy-btn{float:right;border:0;background:var(--primary-soft);color:var(--primary);border-radius:8px;padding:7px 9px;font-size:11px;font-weight:800;margin-bottom:9px;cursor:pointer}.copy-btn+.rewrite{clear:both}
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@media(max-width:1280px){.app-shell{grid-template-columns:300px minmax(430px,1fr)}.right-column{grid-column:1/-1;position:static;max-height:none;grid-template-columns:1fr}.left-column{top:91px}.editor-card{min-height:760px}.journey{display:none}.topbar{grid-template-columns:auto 1fr}.top-actions{justify-self:end}.rubric{grid-template-columns:repeat(4,1fr)}}
@media(max-width:780px){body{font-size:16px}.topbar{height:64px;padding:0 12px;gap:8px}.brand-icon{width:38px;height:38px}.brand small{display:none}.ai-status span{display:none}.ai-status{padding:8px}.top-actions{gap:0}.icon-btn{min-width:42px}.icon-btn small{display:none}.app-shell{display:flex;flex-direction:column;padding:10px;gap:11px}.left-column,.right-column{display:contents}.topic-card{order:1}.outline-card{order:2}.editor-card{order:3;min-height:590px;width:100%}.feedback-card,.result-card{order:4;width:100%}.filter-grid{grid-template-columns:1fr 1fr}.section-title{align-items:flex-start}.editor-head{padding:14px 15px 10px;align-items:flex-start}.editor-title .step-icon{display:none}.stats{font-size:11px}.goal-wrap{padding:0 15px 10px}.editor-actions{align-items:stretch}.editor-actions,.editor-actions>div{display:grid;grid-template-columns:1fr 1fr}.editor-actions .ghost-btn{grid-row:2;grid-column:1/-1}.editor-actions>div{display:contents}#essayInput{min-height:400px;padding:18px;font-size:16px}.left-column,.right-column{position:static;max-height:none;overflow:visible}.modal-row{flex-direction:column}.rubric{grid-template-columns:1fr 1fr}.prompt-box{padding:13px}.target{align-items:flex-start}.toast{top:72px}.outline-card{padding:17px}.history-detail .modal{padding:18px}}
@media(max-width:420px){.filter-grid{grid-template-columns:1fr}.filter-grid label:first-child{grid-column:auto}.surprise-btn{font-size:0}.surprise-btn::after{content:"✦";font-size:14px}.rubric{grid-template-columns:1fr}.target button{white-space:nowrap}.review-switch button{font-size:11px}}
@media(display-mode:standalone){.topbar{padding-top:env(safe-area-inset-top);height:calc(64px + env(safe-area-inset-top))}.app-shell{padding-bottom:calc(10px + env(safe-area-inset-bottom))}}

.ai-model-status{margin-top:10px;padding:10px 11px;border-radius:10px;background:#f6f7fb;color:#667085;font-size:12px;line-height:1.45}.ai-model-status:empty{display:none}