@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:100 900;src:url(/fonts/inter-latin-wght.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:100 800;src:url(/fonts/jetbrains-mono-latin-wght.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--paper: #f3f0ea;--surface: #ffffff;--sunken: #f4f2ee;--ink: #12161c;--muted: #5b6069;--line: #d6d2ca;--line-strong: #b8b1a5;--scroll-thumb: #b8b1a5;--cobalt: #2547c9;--cobalt-soft: #eaeefc;--pass: #17794c;--pass-soft: #e8f4ed;--fail: #c0392b;--fail-soft: #fbecea;--code-bg: #171b21;--code-ink: #e6e3dd;--radius: 8px;--ui: "Inter", system-ui, sans-serif;--mono: "JetBrains Mono", ui-monospace, monospace}[data-theme=dark]{--paper: #0e1116;--surface: #141920;--sunken: #11151b;--ink: #e8e6e1;--muted: #949aa4;--line: #262d37;--line-strong: #262d37;--scroll-thumb: #3a4350;--cobalt: #7b93f5;--cobalt-soft: #1b2440;--pass: #4ec08a;--pass-soft: #14291f;--fail: #ef7a6d;--fail-soft: #2b1816;--code-bg: #0b0e13;--code-ink: #e6e3dd}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--ui);background:var(--paper);color:var(--ink);font-size:16px;-webkit-font-smoothing:antialiased;font-variant-ligatures:none}button{font-family:inherit;cursor:pointer}*{scrollbar-width:thin;scrollbar-color:transparent transparent}*:hover{scrollbar-color:var(--scroll-thumb) transparent}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track,::-webkit-scrollbar-corner{background:transparent}::-webkit-scrollbar-thumb{background:transparent;border:2px solid transparent;border-radius:8px;background-clip:content-box}:hover::-webkit-scrollbar-thumb{background-color:var(--scroll-thumb)}:focus-visible{outline:2px solid var(--cobalt);outline-offset:2px}@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}.app{position:relative;display:grid;grid-template-rows:56px auto minmax(0,1fr);height:100%}.header{display:flex;align-items:center;gap:16px;padding:0 16px;border-bottom:1px solid var(--line-strong);background:var(--surface)}.brand{font-family:var(--mono);font-weight:700;font-size:17px;letter-spacing:-.02em;display:flex;align-items:center;gap:10px}.brand span{color:var(--cobalt)}.brand img{display:block;flex:none}a.brand{color:inherit;text-decoration:none;align-self:flex-start}a.brand:hover{color:var(--cobalt)}.header-spacer{flex:1}.runtime{font-family:var(--mono);font-size:12px;color:var(--muted)}.ghost-btn{background:none;border:1px solid var(--line);color:var(--ink);border-radius:var(--radius);padding:6px 12px;font-size:13px;font-weight:500}.ghost-btn:hover:not(:disabled){background:var(--sunken)}.ghost-btn:disabled{opacity:.5;cursor:default}.account-menu{position:relative}.account-btn{position:relative;width:32px;height:32px;border-radius:50%;border:1px solid var(--line-strong);background:var(--sunken);color:var(--ink);font-family:var(--ui);font-size:14px;font-weight:600;line-height:1;display:grid;place-items:center;flex:none}.account-btn:hover{border-color:var(--cobalt)}.account-dot{position:absolute;top:-2px;right:-2px;width:9px;height:9px;border-radius:50%;background:var(--fail);border:2px solid var(--surface)}.account-panel{position:absolute;top:calc(100% + 8px);right:0;z-index:30;width:min(280px,calc(100vw - 32px));padding:12px;background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius);box-shadow:0 8px 24px #00000024;display:flex;flex-direction:column;gap:8px}.account-email{margin:0;font-size:13px;font-weight:600;overflow-wrap:anywhere}.account-sync{margin:0 0 4px;font-size:12px;line-height:1.5;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:10px}.account-item{background:none;border:none;border-radius:6px;padding:8px 10px;margin:0 -4px;text-align:left;font:inherit;font-size:14px;color:var(--ink)}.account-item:hover{background:var(--sunken)}.rail{height:3px;background:var(--line-strong);width:160px;border-radius:2px;overflow:hidden}.rail i{display:block;height:100%;background:var(--cobalt);transition:width .22s ease}.panes{display:grid;grid-template-columns:minmax(300px,1fr) minmax(320px,1.1fr) minmax(280px,.9fr);min-height:0}.pane{display:flex;flex-direction:column;min-width:0;min-height:0;border-right:1px solid var(--line-strong);background:var(--surface)}.pane:last-child{border-right:none}.pane-head{display:flex;align-items:center;gap:10px;height:40px;padding:0 14px;border-bottom:1px solid var(--line-strong);font-family:var(--mono);font-size:12px;color:var(--muted);flex:none}.pane-body{flex:1;min-height:0;overflow:auto}.lesson{padding:22px 26px 60px;max-width:68ch;line-height:1.7}.lesson-step{font-family:var(--mono);font-size:12px;color:var(--muted);margin-bottom:6px}.lesson h1{font-family:var(--mono);font-size:22px;line-height:1.3;letter-spacing:-.02em;margin:0 0 4px}.lesson h1:before{content:">>> ";color:var(--cobalt)}.lesson .goal{color:var(--muted);margin:0 0 24px;font-size:15px}.lesson p{margin:0 0 16px}.lesson ul{padding-left:20px;margin:0 0 16px}.lesson li{margin-bottom:6px}.lesson code{font-family:var(--mono);font-size:.88em;background:var(--sunken);padding:1px 5px;border-radius:4px}.lesson pre{background:var(--code-bg);color:var(--code-ink);padding:14px 16px;border-radius:var(--radius);overflow-x:auto;margin:0 0 18px}.lesson pre code{background:none;padding:0;font-size:13px;line-height:1.6;color:inherit}.lesson table{width:100%;border-collapse:collapse;margin:0 0 18px;font-size:14px}.lesson th,.lesson td{border-bottom:1px solid var(--line);padding:7px 10px;text-align:left}.lesson th{font-weight:600}.lesson td:first-child,.lesson th:first-child{font-family:var(--mono)}.lesson strong{font-weight:600}.task{margin-top:28px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);overflow:hidden}.task-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:7px 14px;background:var(--sunken);border-bottom:1px solid var(--line);font-family:var(--mono);font-size:12px;color:var(--muted)}.task-name{color:var(--ink);font-weight:600}.task-status{display:inline-flex;align-items:center;gap:6px}.task-body{padding:14px 16px 2px}.task-body p{margin:0 0 12px}.task.done{border-color:var(--pass)}.task.done .task-head{background:var(--pass);border-bottom-color:var(--pass);color:var(--surface)}.task.done .task-name{color:var(--surface)}.checkpoints{list-style:none;margin:0;padding:6px 16px}.checkpoint{position:relative;display:grid;grid-template-columns:22px 1fr;gap:10px;padding:10px 0}.checkpoint+.checkpoint{border-top:1px solid var(--line)}.checkpoint-mark{display:grid;place-items:center;width:22px;height:22px;margin-top:2px;border-radius:50%;border:1.5px solid var(--line-strong);font-family:var(--mono);font-size:11px;font-weight:600;color:var(--muted)}.checkpoint-body p{margin:0}.checkpoint.passed .checkpoint-mark{background:var(--pass);border-color:var(--pass);color:var(--surface)}.checkpoint.current .checkpoint-mark{border-color:var(--cobalt);background:var(--cobalt-soft);color:var(--cobalt)}.checkpoint.current .checkpoint-body{font-weight:500}.checkpoint.later .checkpoint-body{color:var(--muted)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.hints{margin-top:28px;border-top:1px solid var(--line);padding-top:18px}.hint{background:var(--sunken);border-radius:var(--radius);padding:12px 14px;margin-bottom:8px;font-size:14px}.hint-note{margin:4px 0 0;font-size:14px;color:var(--muted)}.link-btn{background:none;border:none;color:var(--cobalt);padding:0;font-size:14px;font-weight:500;text-decoration:underline;text-underline-offset:3px}.editor-wrap{flex:1;min-height:0;overflow:hidden}.editor-wrap>.cm-theme{height:100%;min-height:0}.editor-wrap .cm-editor{height:100%}.editor-wrap .cm-scroller{overflow:auto}.editor-actions{display:flex;align-items:center;gap:8px;padding:10px 14px;border-top:1px solid var(--line-strong);flex:none}.run-btn{background:var(--cobalt);color:#fff;border:none;border-radius:var(--radius);padding:9px 20px;font-size:14px;font-weight:600}.run-btn:disabled{opacity:.55;cursor:default}.run-note{font-size:13px;color:var(--muted);white-space:nowrap}.actions-spacer{flex:1}.pane.terminal{--surface: #0b0e13;--sunken: #11151b;--ink: #e6e3dd;--cobalt: #7b93f5;--cobalt-soft: #1b2440;--muted: #7d858f;--line: #242b34;--line-strong: #242b34;--scroll-thumb: #2f3742;--pass: #4ec08a;--pass-soft: #14291f;--fail: #ef7a6d;--fail-soft: #2b1816;background:var(--surface);color:var(--ink)}.stream{font-family:var(--mono);font-size:15.5px;line-height:1.6;white-space:pre-wrap;word-break:break-word;padding:16px;margin:0}.stream .err{color:var(--fail)}.stream .ok{color:var(--pass)}.stream .stream-note{color:var(--muted)}.empty{padding:16px;font-size:14px;color:var(--muted)}.verdict{border-top:1px solid var(--line);padding:16px;flex:none;animation:settle .26s ease}@keyframes settle{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.verdict.pass{background:var(--pass-soft)}.verdict.fail{background:var(--fail-soft)}.verdict.partial{background:var(--cobalt-soft)}.verdict-title{font-family:var(--mono);font-size:13px;font-weight:700;margin-bottom:6px;display:flex;align-items:center;gap:6px}.verdict.pass .verdict-title{color:var(--pass)}.verdict.fail .verdict-title{color:var(--fail)}.verdict.partial .verdict-title{color:var(--cobalt)}.verdict-step{font-family:var(--mono);font-size:13px;color:var(--muted);margin-bottom:6px}.verdict-steps{list-style:none;margin:12px 0 0;padding:10px 0 0;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:6px}.verdict-step-row{display:flex;align-items:center;gap:8px;min-width:0;font-size:13px;color:var(--muted)}.verdict-step-mark{flex:none;width:18px;height:18px;border-radius:50%;display:grid;place-items:center;font-family:var(--mono);font-size:11px;border:1px solid var(--line-strong);color:var(--muted)}.verdict-step-row.passed .verdict-step-mark{border-color:var(--pass);background:var(--pass);color:#fff}.verdict-step-row.current .verdict-step-mark{border-color:var(--cobalt);color:var(--cobalt)}.verdict-step-row.passed .verdict-step-text{color:var(--ink)}.verdict-step-row.current .verdict-step-text{color:var(--ink);font-weight:500}.verdict-step-text{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.verdict-msg{font-size:15.5px;line-height:1.6;white-space:pre-wrap;font-family:var(--mono)}.scrim{position:fixed;inset:0;background:#0a0c1066;z-index:20;opacity:0;visibility:hidden;transition:opacity .24s ease,visibility 0s linear .24s}.scrim.open{opacity:1;visibility:visible;transition:opacity .24s ease}.drawer{position:fixed;top:0;left:0;bottom:0;width:min(380px,88vw);background:var(--surface);border-right:1px solid var(--line);z-index:21;overflow-y:auto;padding:18px 20px 40px;transform:translate(-100%);visibility:hidden;transition:transform .26s cubic-bezier(.2,.7,.2,1),visibility 0s linear .26s}.drawer.open{transform:none;visibility:visible;transition:transform .26s cubic-bezier(.2,.7,.2,1)}.drawer h2{font-family:var(--mono);font-size:15px;margin:0 0 4px}.drawer .totals{color:var(--muted);font-size:13px;margin-bottom:22px}.tier{margin-bottom:24px}.tier-name{font-size:14px;font-weight:600;margin-bottom:2px}.tier-blurb{font-size:13px;color:var(--muted);margin-bottom:10px}.mod{margin-bottom:10px}.mod-name{font-size:13px;font-weight:500;color:var(--muted);margin-bottom:4px;display:flex;justify-content:space-between;gap:8px}.lesson-btn{display:flex;align-items:center;gap:8px;width:100%;text-align:left;background:none;border:none;border-radius:6px;padding:6px 8px;font-size:14px;color:var(--ink)}.lesson-btn:hover{background:var(--sunken)}.lesson-btn[aria-current=true]{background:var(--cobalt-soft);color:var(--cobalt);font-weight:500}.dot{width:7px;height:7px;border-radius:50%;background:var(--line);flex:none}.dot.passed{background:var(--pass)}.dot.attempted{background:var(--fail)}.locked{font-size:13px;color:var(--muted);padding:4px 8px}.legal-links{display:flex;gap:16px;margin:28px 0 0;padding-top:14px;border-top:1px solid var(--line);font-size:13px}.legal-links a{color:var(--muted)}.legal-links a:hover{color:var(--cobalt)}.account{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 12px;margin:28px 0 0;font-size:13px;color:var(--muted);overflow-wrap:anywhere}.account .link-btn{font-size:13px}.account+.legal-links{margin-top:14px}.sync-note{font-size:12px;color:var(--fail);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.sync-conflict{position:fixed;top:64px;left:50%;transform:translate(-50%);width:min(560px,calc(100% - 32px));z-index:15;display:flex;align-items:flex-start;gap:12px;padding:12px 14px;background:var(--surface);border:1px solid var(--line-strong);border-left:3px solid var(--fail);border-radius:var(--radius);box-shadow:0 4px 16px #0000001f;font-size:14px;line-height:1.5}.sync-conflict p{margin:0;flex:1}.drawer-extra{margin:24px 0 0;padding-top:14px;border-top:1px solid var(--line);font-size:13px}.drawer-extra .link-btn{font-size:13px}.kotlin-try{position:fixed;inset:0;z-index:45;overflow-y:auto;padding:24px 20px 60px;background:var(--paper)}.kotlin-try>*{width:min(720px,100%);margin-inline:auto}.kotlin-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:8px}.kotlin-head h2{margin:0;font-size:20px}.kotlin-note{margin:0 0 18px;font-size:14px;line-height:1.6;color:var(--muted)}.kotlin-editor{border:1px solid var(--line-strong);border-radius:var(--radius);overflow:hidden}.kotlin-actions{display:flex;align-items:center;flex-wrap:wrap;gap:12px 16px;margin:14px 0}.kotlin-status{font-size:13px;color:var(--muted)}.kotlin-output{margin:0;padding:14px 16px;border-radius:var(--radius);background:var(--code-bg);color:var(--code-ink);font-family:var(--mono);font-size:13px;line-height:1.6;white-space:pre-wrap;overflow-wrap:anywhere}.kotlin-output.bad{border-left:3px solid var(--fail)}.kotlin-history{margin:14px 0 0;font-size:12px;color:var(--muted)}.messages{position:fixed;inset:0;z-index:46;overflow-y:auto;padding:24px 20px 60px;background:var(--paper)}.messages>*{width:min(760px,100%);margin-inline:auto}.messages-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:18px}.messages-head h2{margin:0;font-size:20px}.messages-actions{display:flex;gap:10px}.messages-empty{color:var(--muted);font-size:14px}.message-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}.message-list li{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px}.message-list li.done{opacity:.6}.message-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 16px;font-size:14px}.message-when{color:var(--muted);font-size:13px}.message-body{margin:12px 0;white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px;line-height:1.6}.message-foot{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;font-size:13px}.message-foot .link-btn{font-size:13px}.link-btn.danger{color:var(--fail)}.message-flag{color:var(--muted)}.message-flag.unsent{color:var(--fail)}.login{position:relative;min-height:100%;display:grid;place-items:center;padding:24px 16px;background:var(--paper) url(/login-light.webp) center / cover no-repeat}.login:before{content:"";position:absolute;inset:0;background:#f3f0ea85}@media (max-width: 640px){.login{background-image:url(/login-light-narrow.webp)}}.login-card{position:relative;width:min(380px,100%);box-shadow:0 10px 40px #0a0c1038;display:flex;flex-direction:column;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px 22px}.login-card h1{margin:6px 0 0;font-size:22px}.login-card label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:500}.login-card input{font:inherit;font-size:15px;font-weight:400;color:var(--ink);background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius);padding:9px 11px}.login-card input:focus{outline:2px solid var(--cobalt);outline-offset:-1px}.login-card .run-btn{align-self:flex-start}.login-error{margin:0;font-size:14px;color:var(--fail)}.login-note{margin:4px 0 0;font-size:13px;line-height:1.5;color:var(--muted)}.login-card .legal-links{margin-top:0}.tabs{display:none}@media (max-width: 900px){.panes{grid-template-columns:1fr}.pane{display:none;border-right:none}.pane.active{display:flex}.tabs{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);background:var(--surface)}.tabs button{background:none;border:none;padding:12px 0;font-size:13px;font-weight:500;color:var(--muted);border-top:2px solid transparent;margin-top:-1px}.tabs button[aria-selected=true]{color:var(--cobalt);border-top-color:var(--cobalt)}.app{grid-template-rows:56px auto minmax(0,1fr) auto;grid-template-columns:minmax(0,1fr)}.guest-banner{gap:8px;padding:7px 12px;font-size:12.5px;line-height:1.35;text-align:center}.lesson{padding:18px 18px 40px}.editor-actions{flex-wrap:wrap;row-gap:8px}.header{gap:10px;padding:0 12px}.rail{position:absolute;top:56px;left:0;right:0;width:auto;height:3px;border-radius:0;z-index:5}.runtime.ready,.brand-name{display:none}.account-menu{margin-left:auto}.header-spacer{display:none}.runtime{flex:0 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.brand,.header .ghost-btn{flex:none}}@media (max-width: 480px){.runtime-name{display:none}}.modal-scrim{position:fixed;inset:0;background:#0a0c1073;z-index:40;animation:fade-in .18s ease}.modal{position:fixed;top:50%;left:50%;z-index:41;display:flex;flex-direction:column;width:min(1040px,calc(100vw - 32px));max-height:min(760px,calc(100vh - 48px));transform:translate(-50%,-50%);background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius);animation:modal-in .2s ease}@keyframes fade-in{0%{opacity:0}}@keyframes modal-in{0%{opacity:0;transform:translate(-50%,calc(-50% + 8px))}to{opacity:1;transform:translate(-50%,-50%)}}.modal-head{padding:16px 18px 12px;border-bottom:1px solid var(--line-strong)}.modal-head h2{margin:0 0 4px;font-family:var(--mono);font-size:15px}.modal-head p{margin:0;font-size:14px;color:var(--muted)}.diff{flex:1;min-height:0;overflow:auto;font-family:var(--mono);font-size:13.5px;line-height:1.7}.diff-row{display:grid;grid-template-columns:1fr 1fr;min-width:640px}.diff-cols{position:sticky;top:0;z-index:1}.diff-col-head{padding:6px 12px;background:var(--surface);border-bottom:1px solid var(--line);font-size:12px;color:var(--muted)}.diff-row>:first-child{border-right:1px solid var(--line)}.diff-file{display:flex;gap:10px;align-items:baseline;min-width:640px;padding:6px 12px;background:var(--surface);border-top:1px solid var(--line-strong);border-bottom:1px solid var(--line);font-size:12px;font-weight:600}.diff-file-note{font-weight:400;color:var(--muted)}.diff-cell{position:relative;display:grid;grid-template-columns:40px 16px 1fr;min-width:0}.diff-no{padding-right:10px;text-align:right;color:var(--muted);user-select:none}.diff-sign{user-select:none}.diff-text{white-space:pre;padding-right:12px;font:inherit}.diff-cell.del{background:var(--fail-soft)}.diff-cell.del .diff-sign{color:var(--fail)}.diff-cell.add{background:var(--pass-soft)}.diff-cell.add .diff-sign{color:var(--pass)}.diff-cell.blank{background:var(--sunken)}.modal-actions{display:flex;justify-content:flex-end;gap:8px;padding:12px 18px;border-top:1px solid var(--line-strong)}.pane-head.files{gap:8px}.pane-head-path{font-family:var(--mono);font-size:12px;color:var(--ink)}.tree-toggle,.file-add{display:inline-flex;align-items:center;gap:4px;background:none;border:none;color:var(--muted);font-family:var(--mono);font-size:12px;padding:0;height:40px}.tree-toggle:hover,.file-add:hover{color:var(--ink)}.tree-arrow{display:inline-block;transition:transform .12s ease;font-size:13px;line-height:1}.tree-arrow.open{transform:rotate(90deg)}.editor-main{display:flex;flex:1;min-height:0;position:relative}.file-tree{display:none;width:184px;flex:none;overflow:auto;padding:8px 0 14px;border-right:1px solid var(--line);background:var(--surface)}.file-tree.open{display:block}.tree-row{display:flex;align-items:center;gap:5px;width:100%;background:none;border:none;color:var(--muted);font-family:var(--mono);font-size:12px;text-align:left;padding:5px 10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.tree-row:hover{color:var(--ink);background:var(--sunken)}.tree-file{display:flex;align-items:center}.tree-file.active .tree-row{color:var(--ink);box-shadow:inset 2px 0 0 var(--cobalt)}.tree-produced .tree-row{font-style:italic}.tree-label{padding:12px 10px 4px;font-family:var(--mono);font-size:10px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);opacity:.8;border-top:1px solid var(--line);margin-top:8px}.file-x{background:none;border:none;color:var(--muted);font-size:14px;line-height:1;padding:0 8px}.file-x:hover{color:var(--ink)}.file-name{border:none;border-bottom:2px solid var(--cobalt);background:none;color:var(--ink);font-family:var(--mono);font-size:12px;padding:0 4px;height:26px;width:132px;flex:none}.file-name:focus{outline:none}.file-view{margin:0;height:100%;overflow:auto;padding:12px 14px;font-family:var(--mono);font-size:13.5px;line-height:1.6;white-space:pre-wrap;color:var(--muted)}@media (max-width: 900px){.file-tree.open{position:absolute;top:0;bottom:0;left:0;z-index:6;width:min(224px,78%);border-right:1px solid var(--line-strong)}}.modal.narrow{width:min(460px,calc(100vw - 32px))}.file-note{font-style:normal;font-size:10px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);margin-left:7px;opacity:.75}.file-tab.active>button .file-note{color:var(--cobalt);opacity:1}.file-hint{margin:0;padding:8px 14px;border-bottom:1px solid var(--line);font-size:12.5px;line-height:1.5;color:var(--muted);flex:none}.file-view-head{display:block;margin-bottom:10px;padding-bottom:8px;border-bottom:1px solid var(--line);font-size:12.5px;font-family:var(--sans);color:var(--muted)}.login-hint{margin:-4px 0 0;font-size:13px;color:var(--muted)}.login-sent{margin:0;font-size:14px;line-height:1.6;color:var(--ink);background:var(--cobalt-soft);border:1px solid var(--cobalt);border-radius:var(--radius);padding:12px 14px}.login-switch{display:flex;gap:16px;flex-wrap:wrap;margin:0;font-size:13px}.login-more{display:flex;flex-direction:column;gap:10px}.login-or{display:flex;align-items:center;gap:12px;margin:2px 0;color:var(--muted);font-size:12px;text-transform:lowercase}.login-or:before,.login-or:after{content:"";flex:1;height:1px;background:var(--line)}.card-btn{display:flex;flex-direction:column;gap:2px;width:100%;text-align:left;font:inherit;cursor:pointer;padding:12px 14px;border-radius:var(--radius);border:1px solid var(--cobalt);background:var(--cobalt-soft);color:var(--ink)}.card-btn strong{font-size:14px;font-weight:600}.card-btn span{font-size:12.5px;line-height:1.45;color:var(--muted)}.card-btn:hover{border-color:var(--cobalt);box-shadow:0 2px 10px #2547c924}.card-btn.ghost{border-color:var(--line-strong);background:transparent}.card-btn.ghost:hover{border-color:var(--cobalt);background:var(--sunken)}.guest-banner{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:12px;padding:8px 16px;font-size:13px;background:var(--cobalt-soft);color:var(--ink);border-bottom:1px solid var(--line)}.button-small{background:var(--cobalt);color:#fff;border:0;border-radius:var(--radius);padding:6px 14px;font:inherit;font-size:13px;font-weight:600;cursor:pointer}.button-small:hover{background:#1d3aa8}.account-item.danger{color:var(--fail)}.guest-slot{height:0}