/* rainyfei 工具入口：共用樣式（登入頁、入口頁） */
:root {
  --bg: #F4F6FB; --card: #fff; --ink: #1F2433; --sub: #6B7385; --primary: #3D6FF2; --primary-ink: #fff;
  --line: #E3E7F0; --danger: #D64545; --ok: #2E8B57;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14171F; --card: #1E222C; --ink: #E8EBF2; --sub: #9AA1B2; --primary: #6C90F5; --line: #2C3140; --danger: #F07070; --ok: #5CC28A; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: system-ui, "Noto Sans TC", sans-serif; line-height: 1.5; }
main { max-width: 560px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 20px; margin: 0; }
h2 { font-size: 15px; margin: 28px 0 4px; }
.sub { color: var(--sub); font-size: 13px; margin: 4px 0 0; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; margin-top: 12px; }
a.app { display: block; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; margin-top: 12px; color: var(--ink); text-decoration: none; }
a.app:hover, a.app:focus-visible { border-color: var(--primary); }
a.app b { display: block; font-size: 16px; margin-bottom: 2px; }
label { display: block; font-size: 13px; color: var(--sub); margin-top: 12px; }
input { display: block; width: 100%; margin-top: 4px; padding: 10px 12px; font: inherit; font-size: 16px; color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px; }
input:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
button { font: inherit; font-size: 15px; padding: 10px 16px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--ink); cursor: pointer; }
button.primary { width: 100%; margin-top: 16px; background: var(--primary); border-color: var(--primary); color: var(--primary-ink); font-weight: 600; }
button.small { font-size: 13px; padding: 6px 10px; }
button:disabled { opacity: .6; cursor: default; }
.divider { display: flex; align-items: center; gap: 12px; color: var(--sub); font-size: 13px; margin: 20px 0 4px; }
.divider::before, .divider::after { content: ""; flex: 1; border-top: 1px solid var(--line); }
.msg { min-height: 1.5em; font-size: 14px; margin: 12px 0 0; }
.msg.error { color: var(--danger); }
.msg.ok { color: var(--ok); }
ul.keys { list-style: none; padding: 0; margin: 0; }
ul.keys li { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); }
ul.keys li:last-child { border-bottom: 0; }
[hidden] { display: none !important; }

/* 九宮格圖形 */
.pattern-wrap { display: flex; justify-content: center; margin-top: 12px; }
.pattern-pad { width: min(260px, 100%); aspect-ratio: 1; touch-action: none; user-select: none; -webkit-user-select: none;
  background: var(--bg); border: 1px solid var(--line); border-radius: 16px; cursor: pointer; }
.pattern-pad .dot { fill: var(--sub); opacity: .45; transition: opacity .1s, r .1s; }
.pattern-pad .dot.on { fill: var(--primary); opacity: 1; r: 18; }
.pattern-pad line { stroke: var(--primary); stroke-width: 8; stroke-linecap: round; opacity: .7; }
.pattern-pad.error .dot.on { fill: var(--danger); }
.pattern-pad.error line { stroke: var(--danger); }
.pattern-pad.ok .dot.on { fill: var(--ok); }
.pattern-pad.ok line { stroke: var(--ok); }
.pattern-pad.disabled { opacity: .5; pointer-events: none; }
.center { text-align: center; }
.link { background: none; border: 0; padding: 4px 0; color: var(--primary); font-size: 14px; text-decoration: underline; cursor: pointer; }
.links { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-top: 16px; }

/* 2FA */
.qr { display: flex; justify-content: center; margin-top: 12px; }
.qr img { width: 200px; height: 200px; background: #fff; border-radius: 8px; padding: 4px; }
code.secret, ul.codes { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; }
code.secret { display: block; word-break: break-all; text-align: center; font-size: 15px; margin-top: 8px; user-select: all; }
ul.codes { list-style: none; padding: 12px; margin: 12px 0 0; background: var(--bg); border-radius: 10px;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px; text-align: center; font-size: 15px; user-select: all; }
.badge { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--line); color: var(--sub); margin-left: 6px; vertical-align: 1px; }
.badge.on { color: var(--ok); border-color: var(--ok); }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.section-head b { font-size: 15px; }
.row { display: flex; gap: 8px; margin-top: 16px; }
.row button { flex: 1; margin-top: 0; }