:root {
    --bg: #f4f5f9;
    --card: #ffffff;
    --ink: #0f172a;
    --muted: #64748b;
    --line: #e2e8f0;
    --brand: #4f46e5;
    --brand-dark: #4338ca;
    --ok: #059669;
    --warn: #b45309;
    --danger: #dc2626;
    --radius: 14px;
    --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 16px 40px -24px rgba(15, 23, 42, .25);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font: 15px/1.65 -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.muted { color: var(--muted); font-size: 13.5px; }
.hint { margin: 12px 0 0; color: var(--muted); font-size: 13px; }
.hidden-form { display: none; }

/* ---------------------------------------------------------------- 框架 */

.bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    max-width: 940px;
    margin: 0 auto;
    padding: 20px 24px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 650; }
.brand:hover { text-decoration: none; }

.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--brand), #7c3aed);
    color: #fff;
    font-size: 12px;
    letter-spacing: .02em;
}

.bar-nav { display: flex; align-items: center; gap: 14px; }
.nav-link { color: var(--muted); font-size: 14px; }
.nav-link.is-active, .nav-link:hover { color: var(--ink); text-decoration: none; }
.who { color: var(--muted); font-size: 14px; }
.inline-form { display: inline; }

.page {
    max-width: 940px;
    margin: 0 auto;
    padding: 6px 24px 48px;
    display: grid;
    gap: 18px;
}
.page-narrow { max-width: 880px; }

.foot {
    max-width: 940px;
    margin: 0 auto;
    padding: 0 24px 40px;
    color: var(--muted);
    font-size: 13px;
}

/* ---------------------------------------------------------------- 提示 */

.flash {
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: var(--card);
    font-size: 14px;
}
.flash-success { border-color: #a7f3d0; background: #ecfdf5; color: #065f46; }
.flash-error { border-color: #fecaca; background: #fef2f2; color: #991b1b; }

/* ---------------------------------------------------------------- 按钮 */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 11px 18px;
    border-radius: 10px;
    border: 1px solid transparent;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s, border-color .15s, transform .05s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); text-decoration: none; }
.btn-ghost { background: #fff; border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: #cbd5e1; text-decoration: none; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; text-decoration: none; }
.btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 8px; }
.btn-block { width: 100%; }
.btn-spaced { margin-top: 10px; }

/* ---------------------------------------------------------------- 表单 */

.field { display: block; margin-bottom: 14px; }
.field > span { display: block; margin-bottom: 6px; font-size: 13px; font-weight: 600; color: #334155; }
.field small { display: block; margin-top: 6px; color: var(--muted); font-size: 12.5px; }
.optional { margin-left: 6px; font-style: normal; font-weight: 400; color: var(--muted); font-size: 12px; }

.field input {
    width: 100%;
    padding: 11px 13px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    font: inherit;
    color: var(--ink);
}
.field input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(79, 70, 229, .12); }

.field-error { display: block; margin: 6px 0 0; color: var(--danger); font-size: 12.5px; font-style: normal; }

.code-input {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 22px;
    letter-spacing: .28em;
    text-align: center;
    text-transform: uppercase;
}
.code-input-sm { font-size: 17px; padding: 9px 12px; }

/* ---------------------------------------------------------------- 登录 / 注册 */

.auth-shell {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 30px;
    align-items: start;
    padding-top: 24px;
}

.auth-intro { padding: 18px 2px; }
.auth-intro h1 { margin: 14px 0 10px; }
.auth-intro p { color: var(--muted); }
.auth-intro code { background: #eef2ff; padding: 1px 5px; border-radius: 5px; font-size: 13px; }

.points { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.points li { position: relative; padding-left: 22px; color: #334155; font-size: 14px; }
.points li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--brand);
    opacity: .55;
}

h1 { margin: 10px 0 8px; font-size: 30px; line-height: 1.25; letter-spacing: -.02em; }
h2 { margin: 0 0 14px; font-size: 18px; }

.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 999px;
    background: #eef2ff;
    color: var(--brand-dark);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .04em;
}
.tag-plain { text-transform: uppercase; }

.countdown {
    display: inline-block;
    margin-top: 6px;
    padding: 8px 12px;
    border-radius: 8px;
    background: #eef2ff;
    color: var(--brand-dark);
    font-size: 13px;
}

/* ---------------------------------------------------------------- 面板 */

.panel, .card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.panel { padding: 26px; }
.panel-center { text-align: center; padding: 56px 26px; }
.panel-center .panel-actions { justify-content: center; }
.card { padding: 22px; }
.card h2 { font-size: 17px; }
.card-danger { border-color: #fecaca; background: #fffafa; }

.panel-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}
.panel-head h2 { margin: 0; }
.panel-head h1 { margin-top: 8px; }
.panel-head .status { margin-top: 4px; }
.panel-desc { margin: 0 0 18px; color: var(--muted); max-width: 64ch; }
.panel-actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }

/* ---------------------------------------------------------------- 状态 */

.status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
}
.status i { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.status-on { background: #ecfdf5; color: var(--ok); }
.status-off { background: #f1f5f9; color: var(--muted); }
.status-warn { background: #fffbeb; color: var(--warn); }

.callout {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
    padding: 18px 20px;
    border-radius: 12px;
    background: #eef2ff;
    border: 1px solid #e0e7ff;
}
.callout p { margin: 4px 0 0; color: #4338ca; font-size: 13.5px; }

.facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 0; }
.facts > div { background: #f8fafc; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.facts dt { color: var(--muted); font-size: 12.5px; }
.facts dd { margin: 4px 0 0; font-weight: 600; }

/* ---------------------------------------------------------------- 二维码 / 恢复码 */

.setup-grid { display: grid; grid-template-columns: 250px 1fr; gap: 26px; align-items: start; }
.qr-box { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.qr-box svg { display: block; width: 100%; height: auto; }

.mini-steps { margin: 0 0 18px; padding-left: 20px; color: #334155; }
.mini-steps li { margin-bottom: 8px; }

.secret-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    background: #f8fafc;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 10px 12px;
    margin-bottom: 12px;
}
.secret-row .label { color: var(--muted); font-size: 12.5px; }
.secret-row code { font-size: 13px; letter-spacing: .06em; word-break: break-all; }

.uri-details { margin-bottom: 16px; font-size: 13px; color: var(--muted); }
.uri-details summary { cursor: pointer; }
.uri { display: block; margin-top: 8px; padding: 10px; background: #f8fafc; border-radius: 8px; word-break: break-all; }

.confirm-form { border-top: 1px dashed var(--line); padding-top: 16px; }

.codes { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-bottom: 20px; }
.codes .mono {
    background: #f8fafc;
    border: 1px dashed var(--line);
    border-radius: 8px;
    padding: 10px 12px;
    text-align: center;
    letter-spacing: .08em;
}

/* ---------------------------------------------------------------- 时间线 */

.timeline { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.timeline li {
    display: grid;
    grid-template-columns: 140px 1fr auto;
    gap: 12px;
    align-items: baseline;
    padding: 10px 2px;
    border-bottom: 1px solid var(--line);
    font-size: 13.5px;
}
.timeline li:last-child { border-bottom: 0; }
.timeline-event { font-weight: 600; }
.timeline-detail { color: var(--muted); }
.timeline-meta { color: var(--muted); font-size: 12.5px; white-space: nowrap; }

/* ---------------------------------------------------------------- 响应式 */

@media (max-width: 800px) {
    .auth-shell, .grid-2, .setup-grid { grid-template-columns: 1fr; }
    .facts { grid-template-columns: 1fr; }
    .timeline li { grid-template-columns: 1fr; gap: 2px; }
    .auth-shell { padding-top: 8px; }
}

@media (max-width: 520px) {
    .bar { padding: 14px 16px; }
    .page { padding: 4px 16px 32px; }
    .panel, .card { padding: 18px; }
    h1 { font-size: 24px; }
    .who { display: none; }
}