:root { --fg: #1b2430; --muted: #5b6776; --bg: #f6f8fb; --card: #fff; --line: #d9e0e8; --accent: #1d5fc1; }
@media (prefers-color-scheme: dark) { :root { --fg: #e6ebf2; --muted: #9aa7b8; --bg: #0f1520; --card: #172030; --line: #2a3648; --accent: #6aa5f5; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.8 "Yu Gothic UI", "Meiryo", sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 64px; }
header { display: flex; align-items: center; gap: 14px; margin: 8px 0 24px; }
header img { width: 56px; height: 56px; }
h1 { font-size: 26px; margin: 0; }
h2 { font-size: 20px; margin: 36px 0 12px; border-bottom: 2px solid var(--line); padding-bottom: 6px; }
.lead { color: var(--muted); margin: 0; }
section, .card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px 20px; margin: 16px 0; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; vertical-align: top; padding: 10px 8px; border-bottom: 1px solid var(--line); }
th { width: 9em; color: var(--muted); font-weight: 600; white-space: nowrap; }
.buy { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; padding: 12px 28px; border-radius: 8px; font-weight: 700; }
.buy[aria-disabled="true"] { background: var(--muted); pointer-events: none; }
.todo { background: #fff3c4; color: #5a4300; padding: 0 4px; border-radius: 3px; }
a { color: var(--accent); }
footer { margin-top: 40px; color: var(--muted); font-size: 14px; }
@media (max-width: 520px) { th { white-space: normal; width: 6em; } }