:root{color-scheme:dark;--bg:#080d18;--panel:#0e1625;--line:#1c2a3c;--text:#edf3fc;--muted:#8797ad;--lime:#c0f56a;--cyan:#62d9d0;--purple:#b5a0ff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.55 'DM Sans',system-ui,sans-serif}.sidebar{position:fixed;inset:0 auto 0 0;width:238px;padding:29px 18px;background:#0a101d;border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:2}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--text);font-size:19px;font-weight:800;letter-spacing:-.6px}.brand-mark{display:grid;place-items:center;width:37px;height:37px;border-radius:11px;background:var(--lime);color:#10170b;font-size:22px}.brand small{display:block;color:var(--muted);font:9px 'DM Mono',monospace;letter-spacing:1.2px;margin-top:2px}.accent{color:var(--lime)}.nav-label,.eyebrow,.crumb{font:10px 'DM Mono',monospace;letter-spacing:1.3px;color:var(--muted)}.nav-label{margin:47px 10px 12px}.nav-item{display:flex;align-items:center;gap:13px;padding:11px 12px;border-radius:9px;text-decoration:none;color:#a7b4c7;margin:2px 0}.nav-item.active,.nav-item:hover{background:#172334;color:var(--lime)}.sidebar-bottom{margin-top:auto;border:1px solid var(--line);border-radius:10px;padding:13px;color:#c8d4e4;font-size:12px}.sidebar-bottom small{display:block;color:var(--muted);margin:5px 0 0 18px;font-size:10px}.live-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--lime);margin-right:7px;box-shadow:0 0 10px #c0f56a66}.main{max-width:1440px;margin-left:238px;padding:0 50px}.topbar{height:74px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.crumb span{color:#43536a;margin:0 8px}.profile{display:flex;align-items:center;gap:9px;color:#bdc9d9;font-size:12px}.avatar{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:#223346;color:var(--lime);font-weight:700}.hero{min-height:320px;margin-top:28px;padding:36px 48px;border:1px solid #233348;border-radius:16px;background:radial-gradient(ellipse at 84% 55%,#183c3a66,transparent 40%),linear-gradient(115deg,#101a2b,#0d1726);display:flex;align-items:center;justify-content:space-between;overflow:hidden}.hero-copy{max-width:600px}.hero .eyebrow{color:var(--cyan)}h1{font-size:clamp(34px,4.4vw,54px);line-height:1.1;letter-spacing:-2.2px;margin:16px 0}.hero p{max-width:550px;color:#9eacc0;margin:0 0 24px}.primary{display:inline-flex;align-items:center;gap:24px;background:var(--lime);color:#10170b;text-decoration:none;padding:11px 16px;border-radius:8px;font-weight:800;font-size:13px}.primary span{font-size:18px}.hero-art{position:relative;width:270px;height:230px;margin:0 30px 0 20px;display:grid;place-items:center}.orbit{position:absolute;border:1px solid #65c9b82a;border-radius:50%;transform:rotate(-24deg)}.orbit-a{width:250px;height:125px}.orbit-b{width:205px;height:190px;transform:rotate(38deg)}.shield{position:relative;width:108px;height:126px;display:grid;place-items:center;clip-path:polygon(50% 0,94% 18%,87% 69%,50% 100%,13% 69%,6% 18%);background:linear-gradient(145deg,#c0f56a,#49a98d);color:#10211b;font-size:62px;filter:drop-shadow(0 0 28px #83ecac66)}.shield i{position:absolute;font-style:normal;font-size:24px;right:29px;bottom:36px}.float-tag{position:absolute;background:#111d2d;border:1px solid #2a4351;border-radius:5px;padding:6px 9px;font:9px 'DM Mono',monospace;color:var(--cyan)}.tag-a{top:32px;right:0}.tag-b{bottom:28px;left:0;color:var(--lime)}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;margin:16px 0 38px}.stats article{display:flex;align-items:center;gap:14px;padding:15px 17px;border:1px solid var(--line);border-radius:11px;background:#0d1522}.stat-icon{display:grid;place-items:center;width:36px;height:36px;background:#243247;color:var(--cyan);border-radius:9px;font-size:17px}.stat-icon.green{color:var(--lime)}.stat-icon.purple{color:var(--purple)}.stats strong{display:block;font-size:19px}.stats small{display:block;color:var(--muted);font-size:11px}.section-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:16px}.section-head h2{margin:6px 0 0;font-size:22px;letter-spacing:-.6px}.section-note{font-size:11px;color:var(--muted)}.room-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.room-card{position:relative;display:flex;flex-direction:column;min-height:220px;padding:18px;border:1px solid var(--line);border-radius:12px;background:linear-gradient(145deg,#101a29,#0c1420);transition:transform .2s,border .2s}.room-card:hover{transform:translateY(-3px);border-color:#3a5663}.room-top{display:flex;justify-content:space-between;align-items:center}.room-icon{display:grid;place-items:center;width:39px;height:39px;border-radius:10px;background:#172e35;color:var(--cyan);font-size:19px}.room-card:nth-child(2) .room-icon{background:#29233c;color:var(--purple)}.room-card:nth-child(3) .room-icon{background:#283521;color:var(--lime)}.difficulty{font:9px 'DM Mono',monospace;color:#a5b3c6;border:1px solid #2d3b4e;border-radius:20px;padding:4px 8px}.room-card h3{font-size:16px;margin:14px 0 4px}.room-card p{font-size:12px;color:var(--muted);margin:0 0 18px}.room-meta{margin-top:auto;display:flex;justify-content:space-between;align-items:center;font:10px 'DM Mono',monospace;color:#8c9bb0}.start-room{border:0;background:transparent;color:var(--lime);font:600 12px 'DM Sans';cursor:pointer;padding:6px 0}.check{color:var(--lime)}footer{padding:28px 0 36px;color:#68788e;font-size:10px}.room-dialog{width:min(760px,calc(100% - 24px));max-height:90vh;padding:0;border:1px solid #26384d;border-radius:14px;background:#0b1320;color:var(--text);box-shadow:0 30px 100px #000b}.room-dialog::backdrop{background:#030711c9;backdrop-filter:blur(5px)}.dialog-content{padding:28px}.close{float:right;background:none;border:0;color:#94a4b9;font-size:26px;cursor:pointer}.dialog-content h2{margin:8px 0;font-size:27px}.dialog-content>p{color:var(--muted);margin:0 0 22px}.task-box{border:1px solid var(--line);border-radius:11px;padding:16px;background:#0e1725}.task-title{display:flex;justify-content:space-between;font:10px 'DM Mono',monospace;color:#a8b7ca;letter-spacing:1px}.task-points{color:var(--lime)}#room-task{font-size:13px;color:#c6d2e0;margin:12px 0 16px}.terminal{border:1px solid #233247;border-radius:9px;background:#070c13;overflow:hidden}.terminal-head{display:flex;align-items:center;justify-content:space-between;padding:9px 11px;border-bottom:1px solid #1a2737;color:#8292a7;font:9px 'DM Mono',monospace;letter-spacing:.6px}.terminal-head i{display:inline-block;width:7px;height:7px;border-radius:50%;background:#43536a;margin-right:4px}.terminal-head i:first-child{background:#ff837d}.terminal-head i:nth-child(2){background:#f6cb63}.terminal-head i:nth-child(3){background:#82d98c}.safe-label{color:var(--lime)}.terminal-output{height:195px;overflow:auto;padding:12px;font:12px/1.7 'DM Mono',monospace;color:#b5c5d8;white-space:pre-wrap}.line-command{color:var(--cyan)}.line-success{color:var(--lime)}.terminal-input{display:flex;align-items:center;gap:8px;border-top:1px solid #172332;padding:9px 11px;color:var(--lime);font:13px 'DM Mono',monospace}.terminal-input input{flex:1;min-width:0;background:transparent;border:0;outline:0;color:#e8f0fa;font:12px 'DM Mono',monospace}.terminal-input button,.hint-button{border:1px solid #28394c;border-radius:6px;padding:6px 10px;background:#152235;color:#becce0;font:10px 'DM Mono',monospace;cursor:pointer}.hint-row{display:flex;gap:12px;align-items:center;margin-top:12px;flex-wrap:wrap}.hint-button{color:var(--cyan)}#hint-text{color:#b6c3d4;font-size:11px}.solved-message{margin-top:12px;padding:12px;border:1px solid #44633c;border-radius:8px;background:#182719;color:var(--lime);font-weight:700;font-size:13px}[hidden]{display:none!important}@media(max-width:1050px){.main{padding:0 28px}.hero{padding:30px}.hero-art{transform:scale(.82);margin:0}.room-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:700px){.sidebar{position:static;width:auto;height:auto;padding:12px 16px;border-right:0;border-bottom:1px solid var(--line)}.brand small,.nav-label,.nav-item,.sidebar-bottom{display:none}.brand{font-size:16px}.brand-mark{width:32px;height:32px}.main{margin:0;padding:0 16px}.topbar{height:53px}.crumb{font-size:8px}.profile{font-size:10px}.avatar{width:25px;height:25px}.hero{margin-top:14px;padding:24px 20px;min-height:300px}.hero-art{position:absolute;right:-85px;opacity:.23;transform:scale(.8)}.hero-copy{position:relative;z-index:1}.hero h1{font-size:38px}.hero p{font-size:13px}.stats{gap:7px;margin-bottom:30px}.stats article{display:block;padding:10px}.stat-icon{width:30px;height:30px;margin-bottom:8px}.stats strong{font-size:16px}.stats small{font-size:9px}.section-head{align-items:start;display:block}.section-note{display:block;margin-top:5px}.room-grid{grid-template-columns:1fr}.room-card{min-height:190px}.dialog-content{padding:20px}.dialog-content h2{font-size:23px}}

.practice-area{margin:14px 0 18px;padding:14px;border:1px solid #2d4350;border-radius:9px;background:#0a121d}.practice-heading{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;margin-bottom:12px;color:var(--cyan);font:10px 'DM Mono',monospace;letter-spacing:.7px}.practice-heading span{color:var(--lime)}.practice-label{display:block;margin:10px 0 5px;color:#b7c5d7;font-size:11px}.practice-label small{display:block;color:var(--muted);font-size:10px}.practice-input{width:100%;padding:9px 10px;border:1px solid #2a3b50;border-radius:6px;background:#080e18;color:#e8f0fa;font:12px 'DM Mono',monospace}.practice-button{margin-top:10px;padding:8px 11px;border:1px solid #425b47;border-radius:6px;background:#1b2b22;color:var(--lime);font:11px 'DM Sans',sans-serif;font-weight:700;cursor:pointer}.practice-button:hover{background:#273b2d}.practice-result{min-height:66px;margin:12px 0 0;padding:10px;border:1px solid #1d2b3b;border-radius:6px;background:#070c13;color:#bdcbdc;font:11px/1.65 'DM Mono',monospace;white-space:pre-wrap;overflow-wrap:anywhere}.lesson-note{margin:10px 0 0;color:#8e9eb2;font-size:10px}.filter-row{display:flex;align-items:center;gap:8px}.filter-row .practice-input{flex:1;min-width:0}.filter-row .practice-button{margin-top:0}

.privacy-banner{position:fixed;z-index:10;left:50%;bottom:20px;transform:translateX(-50%);width:min(900px,calc(100vw - 32px));display:flex;align-items:center;justify-content:space-between;gap:26px;padding:20px 22px;border:1px solid #34485d;border-radius:14px;background:#101a29;box-shadow:0 18px 70px #000c}.privacy-banner[hidden]{display:none}.privacy-copy{max-width:600px}.privacy-copy h2{margin:4px 0 6px;font-size:18px}.privacy-copy p{margin:0;color:#c0ccdc;font-size:12px;line-height:1.55}.privacy-copy small{display:block;margin-top:7px;color:#8f9fb4;font-size:10px}.privacy-actions{display:flex;flex-direction:column;gap:8px;flex-shrink:0}.privacy-actions button{border-radius:7px;padding:9px 12px;font:600 11px 'DM Sans',system-ui,sans-serif;cursor:pointer}.privacy-primary{border:1px solid var(--lime);background:var(--lime);color:#10170b}.privacy-secondary{border:1px solid #41536a;background:#172335;color:#d4dfec}.privacy-actions button:hover{filter:brightness(1.12)}.footer-button{display:inline-block;margin-left:10px;border:0;background:transparent;color:var(--cyan);font:inherit;text-decoration:underline;cursor:pointer}.footer-button:hover{color:var(--lime)}
@media(max-width:700px){.privacy-banner{bottom:8px;display:block;width:calc(100vw - 16px);padding:16px;max-height:85vh;overflow:auto}.privacy-copy h2{font-size:16px}.privacy-actions{flex-direction:column-reverse;margin-top:12px}.privacy-actions button{width:100%;padding:11px}.footer-button{margin:8px 0 0;display:block}}

.auth-screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 16px;background:radial-gradient(ellipse at 50% 0,#162d3d 0,transparent 42%),var(--bg)}.auth-brand{margin-bottom:24px}.auth-card{width:min(440px,100%);padding:28px;border:1px solid #26384d;border-radius:15px;background:#0f1827;box-shadow:0 24px 90px #0006}.auth-card h1{font-size:30px;letter-spacing:-1px;margin:10px 0}.auth-intro{font-size:13px;color:var(--muted);margin:0 0 18px}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;gap:7px;padding:4px;background:#09101b;border:1px solid var(--line);border-radius:9px;margin-bottom:17px}.auth-tab{border:0;border-radius:6px;padding:9px;background:transparent;color:#9daec2;font:600 12px 'DM Sans',system-ui,sans-serif;cursor:pointer}.auth-tab.active{background:#1a2a3e;color:var(--lime)}.auth-form label,.settings-form label,.danger-section label{display:block;margin:11px 0 5px;color:#c5d1e0;font-size:11px}.auth-form input,.settings-form input,.danger-section input{width:100%;padding:10px 11px;border:1px solid #2b3c50;border-radius:7px;background:#080e18;color:var(--text);font:13px 'DM Sans',system-ui,sans-serif}.auth-form>small{display:block;color:var(--muted);font-size:10px;margin-top:5px}.primary.full-width{display:flex;justify-content:space-between;width:100%;margin-top:18px;border:0;cursor:pointer;font-family:'DM Sans',system-ui,sans-serif}.auth-error{padding:10px 12px;margin:0 0 12px;border:1px solid #743f4d;border-radius:7px;background:#301c28;color:#ffb3b3;font-size:12px}.auth-privacy{margin-top:17px;padding-top:13px;border-top:1px solid var(--line);color:#8f9fb4;font-size:10px}.auth-foot{margin-top:18px;color:#68788e;font-size:10px}.settings-dialog .dialog-content{padding-top:30px}.settings-account{font-size:12px}.settings-section{padding:15px 0;border-top:1px solid var(--line)}.settings-section h3{margin:0 0 8px;font-size:14px}.settings-section p{font-size:11px;color:var(--muted)}.settings-form{max-width:440px}.settings-form .practice-button{margin-top:12px}.settings-message{min-height:16px;color:var(--lime)!important}.danger-section{border-color:#50313c}.danger-button{display:block;margin-top:10px;border:1px solid #743f4d;border-radius:6px;padding:8px 11px;background:#321e27;color:#ffb3b3;font:600 11px 'DM Sans',system-ui,sans-serif;cursor:pointer}.settings-actions{display:flex;justify-content:flex-end;margin-top:10px}.profile{border:0;background:transparent;cursor:pointer;font-family:inherit}.profile:hover .profile-name{color:var(--lime)}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
@media(max-width:700px){.auth-card{padding:22px}.auth-screen{justify-content:flex-start;padding-top:10vh}.profile{padding:0;font-size:10px}.settings-dialog{width:calc(100% - 16px)}}

.rooms-page{margin-top:28px}.rooms-page .section-head{padding-bottom:16px;border-bottom:1px solid var(--line)}.rooms-page .room-grid{grid-template-columns:1fr;gap:12px}.rooms-page .room-card{min-height:128px;display:grid;grid-template-columns:52px minmax(0,1fr) 150px;grid-template-rows:auto auto;align-items:center;gap:3px 16px;padding:18px 20px;border-left:3px solid #4b7374}.rooms-page .room-top{display:contents}.rooms-page .room-icon{grid-column:1;grid-row:1/3;width:46px;height:46px}.rooms-page .difficulty{grid-column:3;grid-row:1;justify-self:end}.rooms-page .room-card h3{grid-column:2;grid-row:1;margin:0}.rooms-page .room-card p{grid-column:2;grid-row:2;margin:2px 0 0}.rooms-page .room-meta{grid-column:3;grid-row:2;justify-content:flex-end;gap:12px;margin:0}.rooms-page .start-room{white-space:nowrap}
@media(max-width:700px){.sidebar{display:flex;flex-direction:row;align-items:center;justify-content:space-between;gap:4px;flex-wrap:wrap}.sidebar .brand{margin-right:auto}.sidebar .nav-item{display:flex;padding:7px 9px;font-size:11px}.rooms-page .room-card{grid-template-columns:40px minmax(0,1fr);grid-template-rows:auto auto auto auto;gap:4px 11px;padding:14px}.rooms-page .room-icon{grid-column:1;grid-row:1/3;width:38px;height:38px}.rooms-page .difficulty{grid-column:2;grid-row:1;justify-self:start}.rooms-page .room-card h3{grid-column:2;grid-row:2}.rooms-page .room-card p{grid-column:1/3;grid-row:3;margin:8px 0}.rooms-page .room-meta{grid-column:1/3;grid-row:4;justify-content:space-between}}

.privacy-page{max-width:900px;margin:0 auto;padding:28px 24px 60px}.privacy-page .brand{margin-bottom:24px}.privacy-document{padding:32px;border:1px solid var(--line);border-radius:15px;background:#0e1625}.privacy-document h1{font-size:clamp(30px,4vw,42px);margin:10px 0}.document-intro{color:#b5c3d5;font-size:15px}.privacy-document section{padding:18px 0;border-top:1px solid var(--line)}.privacy-document h2{font-size:17px;margin:0 0 8px}.privacy-document p,.privacy-document li{color:#aab8ca;font-size:13px}.privacy-document ul{padding-left:20px}.privacy-document li{margin:5px 0}.privacy-document code{color:var(--cyan);font:12px 'DM Mono',monospace}.document-back{margin-top:18px}.privacy-link{color:var(--cyan);text-decoration:underline}.privacy-link:hover{color:var(--lime)}
@media(max-width:700px){.privacy-page{padding:18px 12px 35px}.privacy-document{padding:20px}.privacy-document p,.privacy-document li{font-size:12px}}

.auth-message{padding:10px 12px;margin:0 0 12px;border:1px solid #3b6654;border-radius:7px;background:#172a23;color:#b8f1c3;font-size:12px}.resend-button{display:block;margin:0 0 12px;border:0;background:transparent;color:var(--cyan);font:600 11px 'DM Sans',system-ui,sans-serif;text-decoration:underline;cursor:pointer}.resend-button:disabled{opacity:.55;cursor:wait}