:root {
  --primary: #1e40af;
  --primary-strong: #17348f;
  --secondary: #3b82f6;
  --accent: #d97706;
  --ink: #172554;
  --text: #334155;
  --muted: #64748b;
  --surface: #ffffff;
  --background: #f8fafc;
  --soft: #eef4ff;
  --border: #dbeafe;
  --danger: #b91c1c;
  --danger-soft: #fef2f2;
  --success: #047857;
  --success-soft: #ecfdf5;
  --warning-soft: #fff7ed;
  --shadow: 0 24px 70px rgba(30, 64, 175, .12);
}
* { box-sizing: border-box; }
html { color-scheme: light; font-family: "Segoe UI", system-ui, -apple-system, sans-serif; background: var(--background); color: var(--text); }
body { margin: 0; min-height: 100vh; background:
  radial-gradient(circle at 5% 0%, rgba(59,130,246,.11), transparent 27rem),
  radial-gradient(circle at 95% 100%, rgba(217,119,6,.08), transparent 25rem),
  var(--background); }
button, input { font: inherit; }
a { color: var(--primary); }
.auth-page { padding: clamp(1rem, 3vw, 3rem); }
.auth-page--login { display: grid; align-items: center; }
.installer-shell, .account-shell { width: min(1120px, 100%); margin: 0 auto; }
.login-shell { width: min(1040px, 100%); margin: auto; display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(1.5rem, 5vw, 5rem); align-items: center; }
.auth-brand { padding: clamp(1rem, 3vw, 2.5rem); }
.auth-brand h1 { max-width: 18ch; margin: .35rem 0 1rem; color: var(--ink); font-size: clamp(2.1rem, 5vw, 4.4rem); line-height: .98; letter-spacing: -.045em; }
.auth-brand p { max-width: 62ch; line-height: 1.65; color: var(--muted); }
.auth-eyebrow { margin: 0; color: var(--primary); font-size: .78rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.auth-card { min-width: 0; margin: 0; padding: clamp(1.25rem, 3vw, 2rem); border: 1px solid var(--border); border-radius: 1.2rem; background: rgba(255,255,255,.96); box-shadow: var(--shadow); }
.auth-card legend { padding: 0 .45rem; color: var(--ink); font-size: 1.08rem; font-weight: 800; }
.auth-card h2 { margin: .35rem 0 1.4rem; color: var(--ink); font-size: 1.75rem; }
.auth-card label { display: grid; gap: .45rem; margin: 0 0 1rem; color: var(--ink); font-size: .9rem; font-weight: 700; }
.auth-card input { width: 100%; min-height: 46px; padding: .72rem .82rem; border: 1px solid #b9c8e4; border-radius: .65rem; background: #fff; color: #0f172a; }
.auth-card input:focus { outline: 3px solid rgba(59,130,246,.25); border-color: var(--secondary); }
.installer-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; padding-bottom: 3rem; }
.installer-grid > .auth-alert, .installer-submit { grid-column: 1 / -1; }
.field-grid { display: grid; grid-template-columns: 1fr .45fr; gap: .75rem; }
.check-line { display: flex !important; grid-template-columns: none !important; flex-direction: row; align-items: flex-start; font-weight: 600 !important; line-height: 1.4; }
.check-line input { width: 1rem; min-height: 1rem; margin-top: .15rem; accent-color: var(--primary); }
.field-note { margin: -.35rem 0 1rem; color: var(--muted); font-size: .82rem; line-height: 1.5; }
.auth-button { display: inline-flex; justify-content: center; align-items: center; min-height: 46px; padding: .72rem 1.15rem; border: 0; border-radius: .7rem; background: var(--primary); color: #fff; font-weight: 800; text-decoration: none; cursor: pointer; box-shadow: 0 10px 24px rgba(30,64,175,.2); }
.auth-button:hover { background: var(--primary-strong); }
.auth-button:focus-visible, .account-header button:focus-visible, .account-header a:focus-visible { outline: 3px solid rgba(59,130,246,.35); outline-offset: 3px; }
.login-card { padding: clamp(1.5rem, 4vw, 2.5rem); }
.login-card .auth-button, .account-card .auth-button { width: 100%; }
.auth-alert, .auth-success { margin-bottom: 1rem; padding: .8rem .9rem; border-radius: .7rem; line-height: 1.45; }
.auth-alert { color: var(--danger); background: var(--danger-soft); border: 1px solid #fecaca; }
.auth-alert--warning { color: #9a3412; background: var(--warning-soft); border-color: #fed7aa; }
.auth-success { color: var(--success); background: var(--success-soft); border: 1px solid #a7f3d0; }
.auth-card--success { max-width: 680px; margin: 2rem auto; text-align: center; }
.auth-badge { display: inline-block; padding: .35rem .65rem; border-radius: 99px; color: var(--success); background: var(--success-soft); font-size: .78rem; font-weight: 800; }
.installer-submit { display: flex; justify-content: space-between; gap: 1rem; align-items: center; padding: 1rem 1.25rem; border: 1px solid var(--border); border-radius: 1rem; background: var(--soft); }
.installer-submit p { margin: 0; color: var(--muted); }
.security-list { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1.5rem; }
.security-list span { padding: .45rem .65rem; border: 1px solid var(--border); border-radius: 999px; color: var(--primary); background: #fff; font-size: .78rem; font-weight: 750; }
.account-header { width: min(1120px, calc(100% - 2rem)); margin: 0 auto 1rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.account-header a, .account-header button { min-height: 44px; display: inline-flex; align-items: center; padding: .55rem .8rem; border: 1px solid var(--border); border-radius: .65rem; background: #fff; color: var(--primary); font-weight: 750; text-decoration: none; cursor: pointer; }
.account-header form { margin: 0; }
.account-card { max-width: 680px; margin: 0 auto 3rem; }
@media (max-width: 760px) {
  .auth-page { padding: .75rem; }
  .login-shell, .installer-grid { grid-template-columns: 1fr; }
  .installer-grid > .auth-alert, .installer-submit { grid-column: auto; }
  .auth-brand { padding: 1rem .5rem 1.25rem; }
  .auth-brand h1 { font-size: clamp(2rem, 12vw, 3.1rem); }
  .field-grid { grid-template-columns: 1fr; }
  .installer-submit { align-items: stretch; flex-direction: column; }
  .installer-submit .auth-button { width: 100%; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }