:root{--bg:#f5f7fa;--surface:#ffffff;--surface-2:#eef2f6;--ink:#101828;--muted:#5b6777;--line:#e1e7ee;--accent:#0f766e;--accent-soft:#d9f3ef;--done:#166534;--radius:12px;color-scheme:light}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0b1117;--surface:#121b25;--surface-2:#18242f;--ink:#e6edf5;--muted:#93a3b4;--line:#22303e;--accent:#2dd4bf;--accent-soft:#11302c;--done:#4ade80;color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0b1117;--surface:#121b25;--surface-2:#18242f;--ink:#e6edf5;--muted:#93a3b4;--line:#22303e;--accent:#2dd4bf;--accent-soft:#11302c;--done:#4ade80;color-scheme:dark}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;font-size:15px;line-height:1.6}
.app{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:100vh}
aside{position:sticky;top:0;height:100vh;overflow-y:auto;background:var(--surface);border-right:1px solid var(--line);padding:24px 18px 20px max(18px,env(safe-area-inset-left,0px));display:flex;flex-direction:column;gap:20px}
main{min-width:0;padding:28px max(20px,env(safe-area-inset-right,0px)) 56px max(20px,env(safe-area-inset-left,0px))}
.wrap{max-width:820px;margin:0 auto}
.mono{font-family:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;font-size:12px;letter-spacing:.04em;color:var(--muted)}
h1,h2,.brand{font-family:"Manrope",system-ui,sans-serif}
.brand{font-weight:800;font-size:19px;line-height:1.2;margin:0}
.back{color:var(--accent);font-size:13px;font-weight:600;text-decoration:none}
.pbar{height:8px;background:var(--surface-2);border-radius:99px;overflow:hidden}
.pbar span{display:block;height:100%;width:0;background:var(--accent);border-radius:99px;transition:width .35s ease}
.overall{display:flex;flex-direction:column;gap:8px}
.nav{display:flex;flex-direction:column;gap:6px}
.nav-item{all:unset;box-sizing:border-box;cursor:pointer;display:flex;flex-direction:column;gap:6px;padding:12px 14px;border-radius:10px;border:1px solid transparent}
.nav-item:hover{background:var(--surface-2)}
.nav-item[aria-current="true"]{background:var(--accent-soft);border-color:var(--accent)}
.nav-top{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.nav-name{font-weight:600}
.nav-item .pbar{height:5px}
.aside-search,.start-field{display:flex;flex-direction:column;gap:6px}
.aside-search input{font:inherit;font-size:14px;width:100%;padding:9px 12px;border-radius:9px;border:1px solid var(--line);background:var(--surface-2);color:var(--ink)}
.aside-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px}
.reset{all:unset;box-sizing:border-box;cursor:pointer;text-align:center;padding:9px 12px;border-radius:9px;border:1px solid var(--line);color:var(--muted);font-size:14px;font-weight:600}
.reset:hover{color:var(--ink);border-color:var(--muted)}
.hero{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:26px}
.hero h1{font-size:clamp(26px,4.5vw,34px);line-height:1.15;margin:8px 0 10px;font-weight:800;text-wrap:balance}
.hero p{margin:0 0 20px;color:var(--muted);max-width:62ch}
.hero-prog{display:flex;align-items:center;gap:14px}
.hero-prog .pbar{flex:1}
.seg{display:inline-flex;gap:4px;padding:4px;background:var(--surface-2);border-radius:10px;margin:24px 0 18px;max-width:100%;overflow-x:auto}
.seg button{all:unset;box-sizing:border-box;cursor:pointer;padding:8px 14px;border-radius:7px;font-weight:600;font-size:14px;color:var(--muted);white-space:nowrap}
.seg button[aria-selected="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.08)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px}
.card.done{border-color:color-mix(in srgb,var(--done) 45%,var(--line))}
.card.wip{border-color:var(--accent)}
.card-head{display:flex;align-items:center;gap:12px;padding:12px 16px 12px 14px}
.check input{width:20px;height:20px;margin:0;accent-color:var(--done);cursor:pointer;display:block}
.card-toggle{all:unset;box-sizing:border-box;flex:1;min-width:0;display:flex;align-items:center;gap:12px;cursor:pointer}
.idx{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--muted);min-width:24px}
.card-title{font-weight:600;flex:1;min-width:0;overflow-wrap:anywhere}
.card.done .card-title{color:var(--muted)}
.card-toggle svg{flex:none;color:var(--muted);transition:transform .2s}
.card-toggle[aria-expanded="true"] svg{transform:rotate(180deg)}
.wip-btn{all:unset;box-sizing:border-box;cursor:pointer;font-size:12px;font-weight:600;padding:5px 10px;border-radius:99px;border:1px solid var(--line);color:var(--muted);white-space:nowrap}
.wip-btn[aria-pressed="true"]{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}
.card-body{padding:0 18px 18px 56px;min-width:0}
.card-body[hidden]{display:none}
.card-body p{margin:0 0 10px;max-width:66ch}
.card-body ul,.card-body ol{margin:0 0 10px;padding-left:20px;max-width:66ch}
.card-body li{margin:4px 0}
code{font-family:"IBM Plex Mono",monospace;font-size:12.5px;background:var(--surface-2);border:1px solid var(--line);padding:1px 5px;border-radius:5px;overflow-wrap:anywhere}
.steps{list-style:none;padding:0!important;counter-reset:s;display:flex;flex-direction:column;gap:10px}
.steps li{counter-increment:s;display:flex;gap:12px;align-items:flex-start}
.steps li::before{content:counter(s);flex:none;width:22px;height:22px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-family:"IBM Plex Mono",monospace;font-size:12px;display:flex;align-items:center;justify-content:center;margin-top:1px}
.quiz{margin-top:14px;padding:14px 16px;background:var(--surface-2);border-radius:10px}
.quiz h4{margin:0 0 8px;font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.quiz ol{margin:0;padding-left:20px}
.quiz li{margin:8px 0}
.quiz li p{margin:0 0 4px}
.quiz details summary{cursor:pointer;color:var(--accent);font-size:14px;font-weight:600}
.quiz details p{margin:6px 0 0;color:var(--muted)}
.notes{margin-top:12px;display:flex;flex-direction:column;gap:6px;max-width:66ch}
.notes label{font-size:12px}
.notes textarea{font:inherit;font-size:14px;width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--surface-2);color:var(--ink);resize:vertical}
.res-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px}
.res-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;display:flex;flex-direction:column;gap:8px;text-decoration:none;color:inherit;min-width:0}
.res-card:hover{border-color:var(--accent)}
.res-card b{font-family:"Manrope",sans-serif;font-size:16px}
.res-desc{color:var(--muted);font-size:14px}
.res-link{margin-top:auto;color:var(--accent);font-size:13px;font-weight:600;overflow-wrap:anywhere}
.intro{color:var(--muted);margin:0 0 16px;max-width:66ch}
.s-list{display:flex;flex-direction:column;gap:8px;margin-top:20px}
.s-item{all:unset;box-sizing:border-box;cursor:pointer;display:flex;flex-direction:column;gap:4px;padding:12px 14px;background:var(--surface);border:1px solid var(--line);border-radius:10px}
.s-item:hover{border-color:var(--accent)}
.pager{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:28px}
.pager .reset{flex:1 1 220px;text-align:left;color:var(--ink)}
.pager .reset:last-child{text-align:right}
.note{margin-top:24px;padding:14px 16px;background:var(--accent-soft);border-radius:var(--radius);font-size:14px}
@media (max-width:860px){
  .app{grid-template-columns:1fr}
  aside{position:static;height:auto;border-right:0;border-bottom:1px solid var(--line);padding:18px max(18px,env(safe-area-inset-left,0px)) 16px;gap:14px}
  .nav{flex-direction:row;overflow-x:auto}
  .nav-item{min-width:200px}
  .card-body{padding-left:18px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
.seo-static{max-width:760px;margin:0 auto;padding:32px 20px;line-height:1.6}.seo-static h1{font-family:"Manrope",system-ui,sans-serif;line-height:1.15;margin:0 0 14px}.seo-static a{color:var(--accent)}