:root{--bg:#f7f8f5;--fg:#1d2621;--muted:#5d6b63;--accent:#2f7d4f;--green:#1d7a45;--card:#fff;--line:#e3e7e2}
@media (prefers-color-scheme:dark){:root{--bg:#121714;--fg:#e8eee9;--muted:#9aa8a0;--accent:#6cc48f;--green:#1d7a45;--card:#1a211d;--line:#2a332e}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
main{max-width:640px;margin:0 auto;padding:28px 14px 40px}
h1{font-size:2rem;margin:0 0 8px;letter-spacing:-.01em}
.explainer{margin:0 0 8px;font-size:1.08rem}
h2{font-size:1.15rem;margin:26px 0 8px}
.muted{color:var(--muted)}.small{font-size:.85rem;font-weight:400}
a{color:var(--accent)}
.grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:5px}
.day{background:var(--card);border:1px solid var(--line);border-radius:10px;min-height:76px;padding:6px 2px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:1px}
.day .wd{font-size:.72rem;color:var(--muted);text-transform:uppercase;letter-spacing:.03em}
.day .dn{font-size:1.15rem;font-weight:600}
.day .t{font-size:.68rem;font-weight:700;line-height:1.15;white-space:normal;overflow-wrap:anywhere;max-width:100%;margin-top:2px}
.day .nx{font-size:.68rem;color:var(--muted);line-height:1.15}
.day.g{background:var(--green);border-color:var(--green);color:#fff}
.day.g .wd{color:#fff}
.day.nd{opacity:.55}
@media (max-width:420px){.grid{gap:3px}.day{padding:5px 1px;min-height:70px;border-radius:8px}.day .t{font-size:.6rem}.day .dn{font-size:1rem}.day .wd{font-size:.62rem;letter-spacing:0}}
.legend{margin:14px 0 0}.sw{display:inline-block;width:.9em;height:.9em;border-radius:3px;background:var(--green);vertical-align:-1px}
.zipbox{margin:26px 0 0;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.zipbox input{width:8em;font:inherit;padding:7px 10px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--fg)}
.zipbox button{font:inherit;font-size:.95rem;padding:7px 12px;border:0;border-radius:10px;background:var(--accent);color:#fff;cursor:pointer}
.zipout{font-size:.95rem}
footer{margin-top:28px;border-top:1px solid var(--line);padding-top:12px}

.learn{margin:0 0 18px;font-size:.92rem;color:var(--muted)}
.learn summary{cursor:pointer;color:var(--accent);list-style:none;width:fit-content}
.learn summary::-webkit-details-marker{display:none}
.learn summary::after{content:" ▾";font-size:.8em}
.learn[open] summary::after{content:" ▴"}
.learn-body{margin-top:8px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--fg)}
.learn-body p{margin:0 0 8px}
.learn-body ul{margin:0 0 8px;padding-left:1.2em}
.learn-body li{margin:0 0 4px}
.learn-body p:last-child,.learn-body ul:last-child{margin-bottom:0}
.area{margin:-6px 0 8px}
.upd{margin:6px 0 0}.upd.stale{color:#9a5b00}
@media (prefers-color-scheme:dark){.upd.stale{color:#f0b35a}}
.note{margin:3px 0 0;line-height:1.35}
.zipout{display:block;width:100%;line-height:1.4}
.zipout .zl{display:block;margin-top:4px;font-size:.9rem}
.zipout .warn{color:#9a5b00}
.tag{font-size:.75rem;padding:1px 6px;border:1px solid var(--line);border-radius:8px;color:var(--muted);font-weight:400}