:root {
  --navy-950: oklch(0.16 0.025 255);
  --navy-900: oklch(0.205 0.035 255);
  --navy-850: oklch(0.245 0.04 255);
  --blue-500: oklch(0.64 0.18 245);
  --cyan-400: oklch(0.82 0.12 205);
  --ink-100: oklch(0.96 0.01 240);
  --ink-300: oklch(0.79 0.025 245);
  --ink-400: oklch(0.69 0.025 245);
  --danger: oklch(0.72 0.18 25);
  --success: oklch(0.77 0.15 160);
  --line: oklch(0.4 0.04 255 / 0.55);
  --bg: var(--navy-950);
  --panel: var(--navy-900);
  --text: var(--ink-100);
  --muted: var(--ink-300);
  --accent: var(--blue-500);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { min-height: 100%; background: var(--bg); }
body {
  min-height: 100dvh;
  color: var(--text);
  background: radial-gradient(circle at 12% 8%, oklch(0.3 0.08 245 / 0.25), transparent 32rem), var(--bg);
  font: 16px/1.65 "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}
button, input { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: wait; opacity: .55; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--cyan-400); outline-offset: 3px; }
.topbar {
  min-height: 88px; padding: 20px clamp(20px, 5vw, 72px); display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--line); background: oklch(0.17 0.025 255 / .82); backdrop-filter: blur(16px);
}
.brand { display: flex; gap: 12px; align-items: center; }
.brand svg { width: 38px; height: 38px; fill: none; stroke: var(--cyan-400); stroke-width: 1.6; }
.brand strong, .brand small { display: block; }
.brand strong { letter-spacing: .02em; }
.brand small { color: var(--muted); font-size: 12px; }
.local-badge { color: var(--cyan-400); border: 1px solid var(--line); padding: 6px 12px; border-radius: 999px; font-size: 12px; letter-spacing: .08em; }
.local-badge i, .status-dot { display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: var(--success); }
main { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.auth-layout { min-height: calc(100dvh - 160px); display: grid; grid-template-columns: 1.25fr .85fr; gap: clamp(48px, 8vw, 108px); align-items: center; padding: 64px 0; }
.overline, .step-label { color: var(--cyan-400); font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
h1, h2 { line-height: 1.2; letter-spacing: -.025em; }
h1 { font-size: clamp(34px, 4vw, 56px); margin: 16px 0 24px; }
h2 { font-size: 20px; }
.lead { color: var(--muted); max-width: 58ch; font-size: 17px; }
.security-list { margin-top: 48px; display: grid; gap: 20px; }
.security-list > div { display: flex; gap: 16px; align-items: flex-start; }
.security-list > div > span { color: var(--cyan-400); font-size: 12px; padding-top: 4px; }
.security-list strong, .security-list small { display: block; }
.security-list small { color: var(--muted); }
.auth-panel, .qr-panel, .account-panel { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 24px 70px oklch(0.08 0.02 255 / .28); }
.auth-panel { padding: 36px; }
.panel-heading { margin-bottom: 28px; }
.panel-heading p { color: var(--muted); font-size: 13px; margin-bottom: 6px; }
form { display: grid; gap: 12px; }
label { color: var(--muted); font-size: 14px; margin-top: 8px; }
input {
  width: 100%; min-height: 48px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px;
  color: var(--text); background: var(--navy-950); outline: none; transition: border-color 160ms ease-out, box-shadow 160ms ease-out;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px oklch(0.64 0.18 245 / .14); }
input::placeholder { color: var(--ink-400); }
.primary, .secondary {
  min-height: 48px; border-radius: 10px; padding: 11px 18px; font-weight: 700; transition: transform 150ms ease-out, background 150ms ease-out;
}
.primary { border: 1px solid transparent; background: var(--accent); color: var(--navy-950); display: flex; justify-content: space-between; align-items: center; }
.primary:hover { background: var(--cyan-400); }
.primary:active, .secondary:active { transform: scale(.98); }
.secondary { border: 1px solid var(--line); background: transparent; color: var(--text); }
.secondary:hover { background: var(--navy-850); }
.text-button { min-height: 44px; background: none; border: 0; color: var(--muted); text-decoration: underline; text-underline-offset: 4px; }
.text-button:hover { color: var(--text); }
.credential-note { color: var(--muted); font-size: 12px; margin-top: 24px; }
code { font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace; }
.form-error { min-height: 24px; color: var(--danger); font-size: 14px; }
.narrow-view { max-width: 560px; margin: 72px auto; background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: clamp(24px, 5vw, 44px); }
.narrow-view h1 { font-size: 34px; }
.narrow-view > p { color: var(--muted); margin-bottom: 28px; }
.code-input { font-family: "Cascadia Code", Consolas, monospace; font-size: 24px; letter-spacing: .12em; }
.enroll-layout { display: grid; grid-template-columns: 1fr 380px; gap: 64px; align-items: center; padding: 64px 0; }
.enroll-layout h1 { font-size: 40px; }
.enroll-layout > div > p { color: var(--muted); }
.setup-steps { margin: 28px 0 28px 22px; color: var(--muted); display: grid; gap: 10px; }
.secret-box { border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.secret-box span, .secret-box code { display: block; }
.secret-box span { color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.secret-box code { overflow-wrap: anywhere; color: var(--cyan-400); user-select: all; }
.qr-panel { padding: 28px; }
.qr-panel img { display: block; width: 220px; height: 220px; margin: 0 auto 24px; background: #f4f7fb; border-radius: 12px; }
.recovery-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 24px 0; }
.recovery-grid code { background: var(--navy-950); border: 1px solid var(--line); border-radius: 8px; padding: 10px; font-size: 13px; user-select: all; }
.recovery-grid + button { width: 100%; margin-bottom: 12px; }
.recovery-view .primary, .narrow-view .primary { width: 100%; justify-content: center; }
.portal-view { padding: 52px 0; }
.portal-heading { display: flex; justify-content: space-between; gap: 24px; align-items: flex-end; margin-bottom: 40px; }
.portal-heading h1 { font-size: 42px; margin: 10px 0; }
.portal-heading p { color: var(--muted); }
.session-box { border-left: 1px solid var(--line); padding-left: 20px; }
.session-box span, .session-box strong { display: block; }
.session-box span { color: var(--muted); font-size: 12px; }
.portal-grid { display: grid; grid-template-columns: 1fr 300px; gap: 32px; }
.portal-grid h2 { margin-bottom: 16px; }
.workspace-list { display: grid; gap: 16px; }
.workspace-card { border: 1px solid var(--line); background: var(--panel); border-radius: 16px; padding: 24px; display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: center; }
.workspace-card h3 { font-size: 22px; margin-bottom: 8px; }
.workspace-card p { color: var(--muted); font-size: 14px; }
.workspace-card .tags { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.tags span { border: 1px solid var(--line); color: var(--muted); border-radius: 999px; padding: 3px 10px; font-size: 12px; }
.workspace-card .primary { min-width: 150px; justify-content: center; }
.account-panel { padding: 24px; align-self: start; }
dl { display: grid; gap: 14px; }
dl > div { display: flex; justify-content: space-between; gap: 16px; }
dt { color: var(--muted); }
dd { overflow-wrap: anywhere; text-align: right; }
.account-panel dl { margin: 24px 0; }
.account-panel button { width: 100%; margin-top: 8px; }
.success-text { color: var(--success); }
.audit-section { margin-top: 44px; }
.section-heading { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.section-heading span { color: var(--muted); font-size: 12px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; min-width: 560px; }
th, td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-size: 12px; font-weight: 500; background: var(--panel); }
td { font-size: 14px; }
tbody tr:last-child td { border-bottom: 0; }
.workspace-view { max-width: 760px; margin: 72px auto; }
.workspace-status { color: var(--success); font-size: 14px; }
.workspace-view h1 { font-size: 44px; }
.workspace-view > p { color: var(--muted); }
.boundary-note { border: 1px solid var(--line); background: var(--panel); border-radius: 14px; padding: 22px; margin: 28px 0; }
.boundary-note p { color: var(--muted); margin-top: 6px; }
.workspace-meta { margin-bottom: 28px; }
.workspace-view > button { margin-right: 10px; }
.feedback { min-height: 28px; margin-top: 16px; color: var(--success) !important; }
.toast { position: fixed; right: 24px; bottom: 24px; z-index: 10; max-width: 360px; background: var(--navy-850); border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; opacity: 0; transform: translateY(8px); pointer-events: none; transition: opacity 180ms ease-out, transform 180ms ease-out; }
.toast.visible { opacity: 1; transform: translateY(0); }
footer { color: var(--muted); text-align: center; padding: 24px; font-size: 12px; }
@media (max-width: 760px) {
  .topbar { padding: 16px 20px; }
  .brand small { display: none; }
  .local-badge { font-size: 10px; padding: 5px 8px; }
  main { width: min(100% - 32px, 620px); }
  .auth-layout, .enroll-layout, .portal-grid { grid-template-columns: 1fr; gap: 32px; padding: 40px 0; }
  .auth-layout { min-height: auto; }
  .auth-panel { padding: 24px; }
  .security-list { margin-top: 32px; }
  .portal-heading { align-items: flex-start; flex-direction: column; }
  .session-box { border-left: 0; padding-left: 0; }
  .workspace-card { grid-template-columns: 1fr; }
  .workspace-card .primary { width: 100%; }
  .narrow-view, .workspace-view { margin: 32px auto; }
  .workspace-view > button { width: 100%; margin: 0 0 10px; justify-content: center; }
  .recovery-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }