@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--bg:#f7f8fc;--card:#fff;--text:#20243a;--muted:#7b8198;--line:#e8eaf2;--primary:#5148df;--soft:#efefff;--sidebar:#fff;--shadow:0 12px 34px rgba(36,39,76,.06)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px 'DM Sans',sans-serif}h1,h2,h3,.brand{font-family:Manrope,sans-serif}h1{font-size:34px;letter-spacing:-1.2px;margin:8px 0}h2{font-size:24px;margin:6px 0}h3{font-size:17px;margin:0 0 16px}p{line-height:1.65}.muted,small{color:var(--muted)}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:252px;background:var(--sidebar);border-right:1px solid var(--line);padding:27px 17px;display:flex;flex-direction:column;z-index:5}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;padding:0 9px 34px}.brand-mark{display:grid;place-items:center;background:linear-gradient(135deg,#6259ef,#a49dff);color:#fff;width:34px;height:34px;border-radius:11px}.side-label,.eyebrow{font-size:10px;letter-spacing:1.6px;font-weight:700;color:#9398ad}.side-label{padding:0 12px 12px}.sidebar nav{display:grid;gap:5px}.nav-link{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:10px;color:#777d94;font-size:13px;font-weight:600;transition:.2s}.nav-link:hover,.nav-link.active{background:var(--soft);color:var(--primary)}.nav-icon{width:19px;text-align:center;font-size:18px}.sidebar-bottom{margin-top:auto;border-top:1px solid var(--line);padding:17px 3px 0;display:flex;align-items:center;gap:10px}.avatar{width:35px;height:35px;border-radius:50%;display:grid;place-items:center;background:#e8e7ff;color:var(--primary);font-weight:800}.user-meta{display:grid;min-width:0;flex:1}.user-meta b{font-size:12px}.user-meta small{font-size:10px;overflow:hidden;text-overflow:ellipsis}.logout{color:var(--muted)}.main-area{margin-left:252px;min-height:100vh;display:flex;flex-direction:column}.topbar{height:68px;background:var(--card);border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 4.2%;gap:12px;font-size:12px;color:var(--muted)}.crumb{color:var(--text);font-weight:700}.top-actions{margin-left:auto;display:flex;align-items:center;gap:16px}.date{font-size:11px}.icon-btn,.mobile-menu{border:0;background:transparent;color:var(--muted);font-size:20px;cursor:pointer}.mobile-menu{display:none}.content{width:min(1160px,100%);padding:34px 4.2%;margin:0 auto;flex:1}footer{text-align:center;padding:20px;color:#a1a5b7;font-size:11px}footer span{padding:0 5px}.hero{min-height:300px;background:linear-gradient(110deg,#17213b 0%,#28385e 55%,#4e55a6 100%);border-radius:22px;color:white;padding:36px 42px;display:grid;grid-template-columns:1.2fr .8fr;overflow:hidden;position:relative}.hero:after{content:"";position:absolute;width:330px;height:330px;border-radius:50%;border:1px solid #ffffff22;right:5%;top:-80px;box-shadow:0 0 0 35px #ffffff08,0 0 0 75px #ffffff06}.hero-copy{position:relative;z-index:1;max-width:520px}.eyebrow.light{color:#9dcbff}.hero h1{font-size:43px;line-height:1.08;margin:12px 0}.hero p{color:#d0d7e8;max-width:460px;font-size:14px}.hero-art{position:relative;display:grid;place-items:center}.book{z-index:1;width:105px;height:130px;border-radius:12px 20px 20px 12px;background:linear-gradient(145deg,#a8a4ff,#6259e9);box-shadow:15px 20px 45px #10152e88;display:grid;place-items:center;font-size:44px}.orbit{position:absolute;border:1px solid #ffffff44;border-radius:50%;width:230px;height:130px;transform:rotate(-24deg)}.orbit2{transform:rotate(48deg);width:180px;height:240px}.float{position:absolute;background:#ffffffed;color:#29304a;padding:9px 13px;border-radius:9px;font-size:11px;font-weight:700;box-shadow:var(--shadow)}.f1{top:16%;left:2%}.f2{right:0;top:38%}.f3{bottom:12%;left:15%}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:0;border-radius:9px;padding:11px 17px;font-size:12px;font-weight:700;cursor:pointer;transition:.2s}.btn:hover{transform:translateY(-1px);filter:brightness(1.04)}.btn.primary{background:var(--primary);color:white}.btn.white{background:#fff;color:#323b68;margin-top:12px}.btn.soft{background:var(--soft);color:var(--primary)}.btn.full{width:100%;margin-top:10px}.section-head,.panel-title,.page-intro{display:flex;align-items:center;justify-content:space-between;gap:18px}.section-head{margin:34px 0 17px}.section-head h2{margin:5px 0}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.stat-card,.panel,.upload-panel,.tool-panel,.focus-panel,.chat-panel{background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.stat-card{padding:19px;display:grid;gap:8px;transition:.2s}.stat-card:hover{transform:translateY(-3px)}.stat-icon{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:var(--soft);color:var(--primary);font-size:18px}.stat-card strong{font:800 28px Manrope}.stat-card>span:last-child{font-size:11px;color:var(--muted)}.two-col{display:grid;grid-template-columns:1.3fr .9fr;gap:17px;margin-top:18px}.panel{padding:22px;margin-bottom:18px}.panel-title{margin-bottom:14px}.panel-title h3{margin:4px 0}.text-link{color:var(--primary);font-size:11px;font-weight:700;background:none;border:0;cursor:pointer}.gradient-panel{background:linear-gradient(145deg,#f0efff,#fafaff);border-color:#e7e5ff}.gradient-panel h3{font-size:21px;margin:13px 0}.gradient-panel p{color:#737994;font-size:13px}.task-row,.material-row{display:flex;align-items:center;gap:13px;padding:13px 0;border-bottom:1px solid var(--line)}.task-row:last-child,.material-row:last-child{border-bottom:0}.task-row>div,.grow{flex:1;min-width:0}.task-row b,.material-row b{display:block;font-size:12px}.task-row small,.material-row small{display:block;font-size:10px;margin-top:4px}.task-dot,.online-dot{width:8px;height:8px;border-radius:50%;background:#6d67e9;flex:none}.pill{border-radius:30px;background:var(--soft);color:var(--primary);padding:5px 9px;font-size:10px;font-weight:700}.page-intro{margin-bottom:25px}.page-intro p{color:var(--muted);margin:5px 0;font-size:13px}.upload-panel{text-align:center;padding:34px;margin-bottom:20px;border-style:dashed}.upload-symbol{width:54px;height:54px;margin:0 auto 12px;display:grid;place-items:center;border-radius:16px;background:var(--soft);color:var(--primary);font-size:26px}.upload-panel h3{margin:0}.upload-panel p{color:var(--muted);font-size:12px}.upload-panel form{display:flex;justify-content:center;gap:10px;align-items:center;flex-wrap:wrap}.file-picker input{max-width:220px;font-size:11px}.file-icon{width:38px;height:38px;border-radius:10px;background:#f1f2ff;color:var(--primary);display:grid;place-items:center;font-size:20px}.empty{text-align:center;padding:35px 15px;color:var(--muted)}.empty>span{display:block;font-size:30px;color:#a5a1ef;margin-bottom:10px}.empty b{display:block;color:var(--text);font-size:13px}.empty p{font-size:11px;margin:5px}.empty.small{padding:20px}.hidden{display:none!important}form label{display:grid;gap:7px;font-size:11px;font-weight:700;color:var(--text);margin:13px 0}input,textarea,select{width:100%;border:1px solid var(--line);border-radius:9px;padding:11px 12px;background:var(--bg);color:var(--text);font:12px 'DM Sans';outline:none}input:focus,textarea:focus,select:focus{border-color:#8983f0}textarea{resize:vertical}form .btn{margin-top:8px}.cards-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.flip-card{padding:17px;border:1px solid var(--line);border-radius:13px;background:var(--bg);cursor:pointer}.flip-card .front{font-weight:700;min-height:50px}.flip-card .back{display:none;color:#5752b9;background:#efefff;border-radius:8px;padding:12px;font-size:12px}.flip-card.revealed .back{display:block}.flip-card.revealed .front{display:none}.flip-card small{font-size:10px}.flip-card form{margin-top:9px}.chat-panel{max-width:850px;margin:auto;overflow:hidden}.chat-head{padding:17px 22px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px}.ai-avatar{width:38px;height:38px;border-radius:12px;background:var(--soft);color:var(--primary);display:grid;place-items:center;font-size:20px}.chat-head b,.chat-head small{display:block;font-size:12px}.chat-head small{font-size:10px;margin-top:4px}.online-dot{display:inline-block;background:#38b779;margin-right:5px}.chat-messages{height:350px;overflow:auto;padding:22px;display:flex;flex-direction:column;gap:12px}.bubble{max-width:85%;white-space:pre-wrap;line-height:1.6;padding:12px 15px;border-radius:13px;font-size:12px}.bubble.assistant{background:var(--bg);align-self:flex-start}.bubble.user{background:var(--primary);color:white;align-self:flex-end}.suggestions{padding:0 20px 12px;display:flex;gap:8px;flex-wrap:wrap}.suggestions button,.timer-options button{border:1px solid var(--line);border-radius:30px;padding:7px 11px;color:var(--muted);font-size:10px;cursor:pointer}.chat-form{display:flex;align-items:flex-end;gap:10px;padding:15px 20px;border-top:1px solid var(--line)}.chat-form textarea{flex:1}.chat-form .btn{margin:0}.tool-panel{max-width:760px;margin:0 auto;padding:35px;text-align:center}.tool-icon{width:62px;height:62px;margin:0 auto 15px;border-radius:18px;background:var(--soft);color:var(--primary);display:grid;place-items:center;font-size:28px}.tool-panel>p{color:var(--muted);font-size:13px}.tool-panel form{text-align:left;max-width:540px;margin:24px auto 0}.tool-result{margin-top:24px;padding:18px;text-align:left;white-space:pre-wrap;line-height:1.7;background:var(--bg);border-radius:12px;font-size:12px}.focus-panel{max-width:650px;margin:30px auto;text-align:center;padding:45px 25px}.timer{font:800 76px Manrope;letter-spacing:-3px;color:var(--primary);margin:22px 0 5px}.timer-mode{color:var(--muted);font-size:12px}.timer-actions{display:flex;justify-content:center;gap:10px;margin:25px}.timer-options{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}.timer-options button.active{background:var(--soft);color:var(--primary);border-color:#d6d3ff}.task-form{display:grid;grid-template-columns:2fr 2fr 1fr 1fr auto;align-items:end;gap:10px}.task-form label{margin:0}.task-form .btn{margin:0}.check{width:23px;height:23px;border:1px solid var(--line);border-radius:7px;color:white;background:white;cursor:pointer}.check.checked{background:var(--primary)}.done{text-decoration:line-through;color:var(--muted)}.notice{padding:12px 15px;border-radius:9px;margin-bottom:15px;font-size:12px}.notice.success{background:#e9f8f0;color:#16764a}.notice.error{background:#fff0f0;color:#b33939}.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:25px;background:radial-gradient(circle at 20% 10%,#e7e6ff,transparent 38%),var(--bg)}.auth-brand{position:absolute;top:35px;left:40px}.auth-card{width:min(420px,100%);background:var(--card);border:1px solid var(--line);border-radius:20px;padding:34px;box-shadow:var(--shadow)}.auth-card h1{font-size:27px}.auth-card>p{font-size:12px}.auth-card .center{text-align:center;margin-top:22px}.auth-card a{color:var(--primary);font-weight:700}.dark{--bg:#171827;--card:#202235;--text:#eff0fb;--muted:#a0a4bb;--line:#34364d;--sidebar:#1e2031;--soft:#30304e;--shadow:0 12px 34px #0002}.dark .gradient-panel{background:#292943}.dark .hero{background:linear-gradient(110deg,#11172a,#33356e)}.dark .flip-card .back{background:#30304e;color:#c8c4ff}.dark .check{background:#292b40}.dark .check.checked{background:var(--primary)}
@media(max-width:900px){.sidebar{transform:translateX(-100%);transition:.25s}.sidebar.open{transform:translateX(0)}.main-area{margin-left:0}.mobile-menu{display:block}.hero{grid-template-columns:1fr}.hero-art{display:none}.stats-grid{grid-template-columns:repeat(2,1fr)}.task-form{grid-template-columns:1fr 1fr}.task-form .btn{align-self:end}.two-col{grid-template-columns:1fr}}
@media(max-width:560px){.content{padding:23px 16px}.topbar{padding:0 16px}.hero{padding:27px 23px}.hero h1{font-size:35px}.stats-grid{gap:9px}.stat-card{padding:14px}.page-intro{align-items:flex-start;flex-direction:column}.cards-list{grid-template-columns:1fr}.panel{padding:17px}.upload-panel{padding:25px 14px}.task-form{grid-template-columns:1fr}.chat-messages{height:300px}.chat-form{padding:12px}.chat-form .btn{padding:10px}.timer{font-size:62px}.auth-brand{left:20px;top:20px}}