:root{--bg:#0f1012;--fg:#e6e7ea;--mut:#80848d;--line:#23252a;--acc:#e6e7ea}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;padding-bottom:80px}
header{display:flex;justify-content:space-between;align-items:center;max-width:640px;margin:0 auto;padding:20px 16px 8px}
h1{font-size:1rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;margin:0;color:var(--mut)}
#bar{display:flex;gap:4px;align-items:center}
#modeTag{color:var(--mut);font-size:.85rem;margin-right:6px}
main{max-width:640px;margin:0 auto;padding:4px 16px}
#empty{text-align:center;color:var(--mut);padding:48px 16px}
button{font:inherit;color:var(--mut);background:none;border:0;border-radius:8px;padding:8px 12px;min-height:44px;cursor:pointer}
button:hover{color:var(--fg)}
button.primary{color:var(--bg);background:var(--fg);font-weight:500}
button.danger{color:#d77}
button.small{min-height:36px;padding:4px 10px;font-size:.9rem}
button:focus-visible,input:focus-visible,textarea:focus-visible{outline:1px solid var(--fg);outline-offset:2px}
.item{border-bottom:1px solid var(--line)}
.sub{margin-left:20px;border-bottom:0}
.head{display:flex;align-items:center;gap:4px}
.chk{flex:none;width:44px;height:44px;padding:0;display:grid;place-items:center;border-radius:50%}
.chk svg{width:22px;height:22px}
.s0{color:var(--mut)}.s1{color:#7fc79c}.s2{color:#8fb4e8}.s3{color:#d77}.s4{color:#5d616a}
.title{flex:1;min-width:0;text-align:left;padding:8px 4px;overflow-wrap:anywhere;color:var(--fg)}
.done>.head .title{color:var(--mut);text-decoration:line-through}
.badge{font-size:.8rem;color:var(--mut)}
.body{padding:0 4px 12px 48px}
.sub .body{padding-left:48px}
.details{white-space:pre-wrap;overflow-wrap:anywhere;color:#b4b8c0;margin:0 0 8px;font-size:.95rem}
.nodetails{color:var(--mut)}
input[type=text],input[type=password],textarea{width:100%;font:inherit;color:var(--fg);background:none;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:8px 4px}
textarea{min-height:90px;resize:vertical;border:1px solid var(--line);border-radius:6px;padding:8px}
input:focus,textarea:focus{border-color:var(--mut)}
.tools{display:flex;flex-wrap:wrap;gap:2px;margin-top:6px}
.grow{flex:1}
#editBar{position:fixed;left:0;right:0;bottom:0;display:flex;gap:4px;align-items:center;max-width:640px;margin:0 auto;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:var(--bg);border-top:1px solid var(--line);z-index:6}
#modal{position:fixed;inset:0;background:rgba(0,0,0,.65);display:grid;place-items:center;padding:16px;z-index:10}
[hidden]{display:none!important}
.card{background:#16171a;border:1px solid var(--line);border-radius:12px;padding:20px;width:100%;max-width:380px}
.card h2{margin:0 0 6px;font-size:1rem;font-weight:500}
.card p{margin:6px 0 12px;color:#b4b8c0;font-size:.95rem}
.row{display:flex;gap:4px;justify-content:flex-end;flex-wrap:wrap;margin-top:12px}
.err{color:#d77!important}
#toast{position:fixed;left:50%;bottom:84px;transform:translateX(-50%);background:#1d1e22;border:1px solid var(--line);padding:8px 14px;border-radius:8px;z-index:11;max-width:90vw;font-size:.9rem}
/* hierarchy: items stand out, sub-items are lighter and indented under a guide line */
.item{padding-top:6px}
.item>.head .title{font-size:1.1rem;font-weight:650}
.item>.head .chk svg{width:26px;height:26px}
.item>.head input[type=text]{font-size:1.1rem;font-weight:650}
.sub{margin-left:22px;padding-top:0;border-left:2px solid var(--line);padding-left:6px}
.sub>.head .title{font-size:.95rem;font-weight:400;color:#c3c6cd}
.sub>.head .chk svg{width:20px;height:20px}
.sub>.head input[type=text]{font-size:.95rem}
.sub .body{padding-left:44px}
.done>.head .title{color:var(--mut)}
/* stronger hierarchy */
.item{padding-top:10px;margin-top:14px;border-bottom:0;border-top:1px solid #34373e}
.item:first-child{margin-top:0;border-top:0}
.item>.head .title{font-size:1.25rem;font-weight:700;letter-spacing:.01em}
.item>.head .chk svg{width:30px;height:30px}
.item>.head input[type=text]{font-size:1.25rem;font-weight:700}
.sub{margin-left:26px;border-left:3px solid #3a3e47;padding-left:8px;margin-top:2px}
.sub>.head .title{font-size:.9rem;color:#a9adb6}
.sub>.head .chk svg{width:18px;height:18px}
.sub>.head input[type=text]{font-size:.9rem}
/* edit mode: each item is a framed block, sub-items are inset panels */
#list.editing>.item{background:#16181c;border:1px solid #34373e;border-radius:12px;padding:10px 10px 12px;margin-top:16px}
#list.editing>.item:first-child{margin-top:0}
#list.editing>.item>.head input[type=text]{border-bottom:1px solid #4a4e58}
#list.editing .sub{background:#101114;border:1px solid #26282e;border-left:3px solid #4a6fa5;border-radius:8px;margin:10px 0 0 14px;padding:6px 8px 8px}
#list.editing .sub>.head input[type=text]{border-bottom:1px solid #2f323a}
#list.editing .body{padding-left:4px;padding-right:0}
#list.editing textarea{background:#0c0d0f}
#list.editing .tools{border-top:1px dashed #2c2f36;padding-top:6px}
/* compact vertical spacing */
.item{padding-top:2px;margin-top:6px}
.sub{margin-top:0;padding-left:8px}
.chk{width:36px;height:36px}
.item>.head .chk svg{width:26px;height:26px}
.sub>.head .chk svg{width:17px;height:17px}
.sub>.head .chk{width:32px;height:32px}
.title{padding:4px 4px;min-height:36px}
button{min-height:36px;padding:4px 10px}
button.small{min-height:30px;padding:2px 8px}
.body{padding-bottom:6px}
.details{margin:0 0 4px}
textarea{min-height:64px}
.tools{margin-top:2px;gap:0}
#list.editing>.item{padding:6px 8px 8px;margin-top:8px}
#list.editing .sub{margin:6px 0 0 10px;padding:4px 6px 6px}
#list.editing .tools{padding-top:2px}
input[type=text]{padding:4px}