:root { --bg: #ffffff; --fg: #1f2328; --muted: #656d76; --line: #d0d7de; --accent: #0969da;
        --ok-bg: #dafbe1; --ok-fg: #1a7f37; --err-bg: #ffebe9; --err-fg: #cf222e; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
       font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif; line-height: 1.7; }
main { max-width: 720px; margin: 0 auto; padding: 56px 16px; }
h1 { font-size: 2rem; margin: 0 0 8px; letter-spacing: .02em; }
h2 { font-size: 1.15rem; margin: 40px 0 12px; }
.lead { color: var(--muted); margin: 0 0 24px; }
.msg { padding: 10px 14px; border-radius: 6px; margin: 0 0 20px; }
.msg.ok { background: var(--ok-bg); color: var(--ok-fg); }
.msg.err { background: var(--err-bg); color: var(--err-fg); }
.account { display: flex; justify-content: flex-end; align-items: center; gap: 12px; min-height: 28px;
           margin: -32px 0 16px; font-size: .9rem; color: var(--muted); }
a { color: var(--accent); }
.inline { display: inline; }
button.link { background: none; color: var(--accent); padding: 0; text-decoration: underline; font-size: inherit; }
.notice { border: 1px dashed var(--line); border-radius: 8px; padding: 16px 20px; color: var(--muted); }
form.entry { display: grid; gap: 14px; border: 1px solid var(--line); border-radius: 8px; padding: 20px; }
label { display: grid; gap: 4px; font-weight: 600; }
input { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; width: 100%; }
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button { font: inherit; justify-self: start; padding: 8px 20px; border: 0; border-radius: 6px;
         background: var(--accent); color: #fff; cursor: pointer; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; }
th { color: var(--muted); font-weight: 600; font-size: .9rem; }
.date { color: var(--muted); font-size: .85rem; white-space: nowrap; }
.empty { color: var(--muted); }