/* LiveRoad v4 — auth pages (split panel) */
.v4-auth {
  min-height: 100vh; display: grid; grid-template-columns: 1.05fr 1fr;
  font-family: var(--font-ui); background: var(--bg); color: var(--ink);
}

/* Left brand panel (always dark) */
.v4-auth-brand {
  position: relative; background: #111318; color: #FAFAFA;
  padding: 48px; display: flex; flex-direction: column;
  overflow: hidden;
}
.v4-auth-brand::before {
  /* faint basemap pattern */
  content: ''; position: absolute; inset: 0; opacity: 0.05;
  background-image:
    linear-gradient(0deg, transparent 49.5%, #FAFAFA 49.5% 50.5%, transparent 50.5%),
    linear-gradient(90deg, transparent 49.5%, #FAFAFA 49.5% 50.5%, transparent 50.5%);
  background-size: 80px 80px;
  pointer-events: none;
}
.v4-auth-brand > * { position: relative; z-index: 1; }
.v4-auth-brand .v4-logo .v4-wordmark { color: #FAFAFA; }
.v4-auth-brand .v4-pulse-dot::before { background: var(--amber); }
.v4-auth-brand h1 {
  font-size: 56px; font-weight: 700; line-height: 1.04; margin: 80px 0 24px;
  letter-spacing: -0.030em;
}
.v4-auth-brand h1 span { color: var(--amber); }
.v4-auth-brand .auth-ticker {
  margin-top: auto; background: #18181B; border: 1px solid #27272A;
  border-left: 3px solid var(--amber); border-radius: var(--r-2);
  padding: 16px 18px; max-width: 420px;
}
.v4-auth-brand .auth-ticker .u-caps-label { color: #A1A1AA; margin-bottom: 8px; display: block; }
.v4-auth-brand .auth-ticker p { margin: 0; font-size: 14px; color: #E4E4E7; line-height: 1.5; }
.v4-auth-brand .auth-trust {
  display: flex; gap: 16px; flex-wrap: wrap; font-size: 12px; color: #71717A;
  margin-top: 24px;
}

/* Right form panel */
.v4-auth-form {
  padding: 32px 48px; display: flex; flex-direction: column;
  background: var(--bg);
}
.v4-auth-form-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 48px;
}
.v4-auth-form-header a {
  color: var(--ink-2); text-decoration: none; font-size: 14px;
}
.v4-auth-form-header a:hover { color: var(--ink); }
.v4-auth-form-body {
  flex: 1; display: flex; flex-direction: column; justify-content: center;
  max-width: 420px; margin: 0 auto; width: 100%;
}
.v4-auth-form-body .u-caps-label { display: block; margin-bottom: 12px; }
.v4-auth-form-body h2 {
  font-size: 44px; font-weight: 700; line-height: 1.05;
  letter-spacing: -0.025em; margin: 0 0 12px; color: var(--ink);
}
.v4-auth-form-body p.lede { margin: 0 0 32px; font-size: 15px; color: var(--ink-2); }
.v4-auth-field { margin-bottom: 16px; }
.v4-auth-field label {
  display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 6px;
  font-weight: 500;
}
.v4-auth-field input {
  width: 100%; padding: 12px 14px; border-radius: var(--r-1);
  border: 1px solid var(--line-2); background: var(--paper);
  font-family: var(--font-ui); font-size: 15px; color: var(--ink);
  transition: border-color var(--t-fast) var(--ease);
  box-sizing: border-box;
}
.v4-auth-field input:focus { outline: none; border-color: var(--amber); }
.v4-auth-form-body .v4-btn { width: 100%; padding: 14px; font-size: 15px; }
.v4-auth-divider {
  display: flex; align-items: center; gap: 12px; margin: 24px 0;
  color: var(--ink-3); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em;
}
.v4-auth-divider::before, .v4-auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--line-2);
}
.v4-sso-row { display: flex; flex-direction: column; gap: 8px; }
.v4-sso-btn {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 12px 14px; border-radius: var(--r-1); border: 1px solid var(--line-2);
  background: var(--paper); color: var(--ink); font-size: 14px; font-weight: 500;
  text-decoration: none; cursor: pointer; font-family: var(--font-ui);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.v4-sso-btn:hover { border-color: var(--ink-2); }
.v4-auth-fine {
  font-size: 12px; color: var(--ink-3); margin-top: 24px; line-height: 1.5;
}
.v4-auth-fine a { color: var(--ink-2); }
.v4-auth-error {
  background: rgba(200,16,46,0.06); border: 1px solid rgba(200,16,46,0.3);
  color: var(--tier-high); padding: 10px 14px; border-radius: var(--r-1);
  font-size: 13px; margin-bottom: 16px;
}
.v4-auth-success {
  background: rgba(0,102,51,0.06); border: 1px solid rgba(0,102,51,0.3);
  color: var(--tier-low); padding: 10px 14px; border-radius: var(--r-1);
  font-size: 13px; margin-bottom: 16px;
}
.v4-auth-foot {
  text-align: center; font-size: 13px; color: var(--ink-2); margin-top: 24px;
}
.v4-auth-foot a { color: var(--ink); font-weight: 500; }

/* Mobile: stack */
@media (max-width: 800px) {
  .v4-auth { grid-template-columns: 1fr; }
  .v4-auth-brand { padding: 32px 20px; min-height: 200px; }
  .v4-auth-brand h1 { font-size: 32px; margin: 24px 0 16px; }
  .v4-auth-brand .auth-ticker, .v4-auth-brand .auth-trust { display: none; }
  .v4-auth-form { padding: 32px 20px; }
  .v4-auth-form-body h2 { font-size: 32px; }
}