:root{
  --bg:#f4f2ee; --card:#ffffff; --ink:#17181c; --muted:#6c6f78; --line:#e4e0d8;
  --accent:#17181c; --accent-ink:#ffffff; --dot:#e5322d; --banner:#fff7e0; --banner-line:#f0dc9c;
  --shadow:0 1px 2px rgba(23,24,28,.06),0 6px 18px rgba(23,24,28,.06);
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#121316; --card:#1d1f24; --ink:#f1f1f3; --muted:#9a9ea8; --line:#2c2f36;
    --accent:#f1f1f3; --accent-ink:#121316; --dot:#ff5a50; --banner:#2a2618; --banner-line:#4a4128;
    --shadow:none;
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.4 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,sans-serif;
  padding:calc(env(safe-area-inset-top) + 8px) 16px calc(env(safe-area-inset-bottom) + 24px);
  max-width:720px;margin:0 auto;min-height:100vh;
}
button{font:inherit;color:inherit}
.top{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;padding:14px 2px 18px}
.top h1{margin:0;font-size:30px;line-height:1.1;letter-spacing:-.02em;font-weight:750}
.eyebrow{margin:0 0 4px;color:var(--muted);font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.06em}
.icon-btn{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--card);font-size:20px;cursor:pointer}
.icon-btn.spin{animation:spin .7s linear}
@keyframes spin{to{transform:rotate(360deg)}}

.banner{display:flex;flex-direction:column;gap:6px;background:var(--banner);border:1px solid var(--banner-line);
  border-radius:18px;padding:14px 16px;margin:0 0 16px;font-size:14px}
.banner strong{font-size:15px}
.banner .share{display:inline-block;padding:0 4px;border:1px solid currentColor;border-radius:5px;font-size:11px}
.banner.accent{background:var(--card);border-color:var(--line);box-shadow:var(--shadow)}
.btn{margin-top:6px;align-self:flex-start;border:0;border-radius:12px;padding:11px 16px;background:var(--accent);
  color:var(--accent-ink);font-weight:650;cursor:pointer}

.tiles{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.tile{position:relative;display:flex;flex-direction:column;justify-content:space-between;min-height:168px;
  padding:16px;border-radius:22px;background:var(--card);box-shadow:var(--shadow);color:inherit;text-decoration:none;
  border:1px solid var(--line);overflow:hidden;-webkit-tap-highlight-color:transparent;transition:transform .12s}
.tile:active{transform:scale(.97)}
.tile::before{content:"";position:absolute;inset:0 0 auto 0;height:5px;background:var(--c)}
.tile .emoji{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;font-size:32px;
  background:color-mix(in srgb,var(--c) 14%,transparent)}
.tile .name{margin:14px 0 2px;font-size:19px;font-weight:720;letter-spacing:-.01em}
.tile .when{font-size:13px;color:var(--muted)}
.tile .when b{color:var(--ink);font-weight:650}
.tile.empty .emoji{filter:grayscale(1);opacity:.6}
.tile .dot{position:absolute;top:16px;right:16px;display:flex;align-items:center;gap:6px;font-size:12px;font-weight:700;
  color:var(--dot);text-transform:uppercase;letter-spacing:.04em}
.tile .dot::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--dot);
  box-shadow:0 0 0 4px color-mix(in srgb,var(--dot) 20%,transparent)}
.tile.skeleton{background:linear-gradient(90deg,var(--card),var(--line),var(--card));background-size:200% 100%;
  animation:sk 1.2s infinite;border-color:transparent}
@keyframes sk{to{background-position:-200% 0}}

.foot{margin-top:26px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);
  display:flex;flex-direction:column;gap:8px}
.foot-actions{display:flex;flex-wrap:wrap;gap:4px 16px}
.link{border:0;background:none;padding:6px 0;color:var(--ink);text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.push-state::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:8px;background:var(--muted)}
.push-state.on::before{background:#2fa84f}

.toast{position:fixed;left:50%;bottom:calc(env(safe-area-inset-bottom) + 20px);transform:translateX(-50%);
  background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:12px;font-size:14px;max-width:90vw}

/* history page */
.history .top{align-items:center;justify-content:flex-start}
.history .top h1{font-size:22px}
.btn-back{padding:9px 12px;border-radius:12px;background:var(--card);border:1px solid var(--line);color:var(--ink);
  text-decoration:none;font-weight:600;white-space:nowrap}
.h-list{display:flex;flex-direction:column;gap:8px}
.h-item{display:flex;flex-direction:column;gap:2px;padding:14px 16px;border-radius:16px;background:var(--card);
  border:1px solid var(--line);color:var(--ink);text-decoration:none}
.h-item small{color:var(--muted)}
.h-empty{color:var(--muted)}

@media (min-width:560px){.tiles{grid-template-columns:repeat(3,1fr)}}