:root { --ink: #1d1d1f; --muted: #5b5b60; --accent: #4a5fd1; --line: #e6e6ea; --bg: #ffffff; --card: #f6f6f8; --danger: #b3261e; --ok: #1f7a3f; }
@media (prefers-color-scheme: dark) {
  :root { --ink: #f2f2f5; --muted: #a7a7ae; --accent: #8c9bff; --line: #2c2c31; --bg: #121214; --card: #1b1b1f; --danger: #ff7b72; --ok: #6fd38a; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif; color: var(--ink); background: var(--bg); }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 24px; }
header { display: flex; align-items: center; justify-content: space-between; padding-top: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 20px; color: var(--ink); text-decoration: none; }
nav a { margin-left: 20px; color: var(--muted); text-decoration: none; }
nav a:hover, footer a:hover { color: var(--accent); }
a { color: var(--accent); }
main { padding: 24px 24px 48px; }
h1 { font-size: 30px; line-height: 1.2; margin: 8px 0 16px; letter-spacing: -0.01em; }
h2 { font-size: 20px; margin: 0 0 12px; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
.small { font-size: 15px; }
.card { background: var(--card); border-radius: 14px; padding: 20px; margin: 16px 0; }
.row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
label { display: block; font-weight: 600; margin: 8px 0 4px; }
input[type=text], input[type=email], input[type=password], select { width: 100%; max-width: 420px; font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--ink); }
input:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
button, .button { display: inline-block; font: inherit; font-weight: 600; background: var(--accent); color: #fff; padding: 10px 18px; border-radius: 10px; border: 0; cursor: pointer; text-decoration: none; }
button.secondary, .button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
button.danger { background: var(--danger); }
button.link { background: none; color: var(--accent); padding: 0; font-weight: 500; text-decoration: underline; }
.code { font: 28px/1.2 "SF Mono", Menlo, monospace; letter-spacing: 0.08em; }
.notice { border-left: 3px solid var(--accent); padding: 8px 16px; margin: 16px 0; color: var(--muted); }
.notice.error { border-color: var(--danger); color: var(--danger); }
.notice.ok { border-color: var(--ok); }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
details { margin: 12px 0; }
summary { cursor: pointer; font-weight: 600; }
footer { padding: 24px 0 48px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.plan { border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.plan.selected { border-color: var(--accent); }
.price { font-size: 28px; font-weight: 700; }
.visually-hidden { position: absolute; left: -9999px; }