:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1c2430;
  --muted: #677385;
  --border: #dde1e7;
  --accent: #2456c9;
  --accent-soft: #e8eefb;
  --error: #b42318;
  --sidebar: #18202c;
  --sidebar-text: #c9d1dc;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

h1 { margin: 0 0 16px; font-size: 24px; line-height: 1.25; }
a { color: var(--accent); }

.layout { display: flex; min-height: 100vh; }

.sidebar {
  display: flex;
  flex: 0 0 240px;
  flex-direction: column;
  padding: 20px 12px;
  background: var(--sidebar);
  color: var(--sidebar-text);
}

.brand { margin: 0 12px 20px; color: #fff; font-size: 18px; font-weight: 600; }
.sidebar nav { display: flex; flex: 1; flex-direction: column; gap: 2px; }

.sidebar nav a {
  padding: 9px 12px;
  border-radius: 6px;
  color: var(--sidebar-text);
  text-decoration: none;
}

.sidebar nav a:hover { background: rgba(255, 255, 255, .07); }
.sidebar nav a.active { background: var(--accent); color: #fff; }

.account { margin: 16px 12px 0; font-size: 14px; }
.account-email { overflow-wrap: anywhere; }

.link-button {
  width: auto;
  margin-top: 4px;
  padding: 0;
  background: none;
  color: #fff;
  text-decoration: underline;
}

.content { flex: 1; min-width: 0; padding: 32px; }
.placeholder { color: var(--muted); }

.auth {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 16px;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}

.field { margin-bottom: 16px; }
label { display: block; margin-bottom: 4px; font-weight: 500; }

input {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
}

input:focus-visible, button:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

button {
  width: 100%;
  padding: 10px 14px;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.hint { margin: 4px 0 12px; color: var(--muted); font-size: 14px; }
.error { margin: 4px 0 12px; color: var(--error); font-size: 14px; }

.qr { max-width: 220px; margin: 0 auto 12px; }
.qr svg { display: block; width: 100%; height: auto; }

.secret {
  margin: 0 0 16px;
  padding: 8px;
  border-radius: 6px;
  background: var(--accent-soft);
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 14px;
  overflow-wrap: anywhere;
}

@media (max-width: 720px) {
  .layout { flex-direction: column; }
  .sidebar { flex: none; }
  .sidebar nav { flex-flow: row wrap; }
  .content { padding: 20px 16px; }
}