:root {
  color-scheme: light;
  --canvas: #f5f5f7;
  --surface: #ffffff;
  --recessed: #f2f2f4;
  --line: #d2d2d7;
  --ink: #1d1d1f;
  --secondary: #515154;
  --muted: #6e6e73;
  --danger: #b42318;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--canvas); color: var(--ink); }
button, input { font: inherit; }

.login-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, .75fr);
  gap: clamp(32px, 7vw, 112px);
  align-items: center;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 56px 0;
}

.login-intro { min-height: 610px; display: flex; flex-direction: column; justify-content: space-between; padding: 16px 0; }
.brand { display: flex; align-items: center; gap: 12px; width: fit-content; color: inherit; text-decoration: none; font-size: 13px; }
.product-name { font-weight: 650; }
.brand-divider { width: 1px; height: 18px; background: var(--line); }
.powered-label { color: var(--muted); }
.kineticus-name { font-size: 12px; font-weight: 650; letter-spacing: .19em; }
.eyebrow { margin: 0 0 20px; color: var(--muted); font-size: 11px; font-weight: 650; letter-spacing: .16em; }
.intro-copy { max-width: 650px; }
.intro-copy h1 { margin: 0; max-width: 620px; font-size: clamp(54px, 6.7vw, 94px); line-height: .93; letter-spacing: -.065em; font-weight: 600; }
.intro-copy > p:last-child { max-width: 570px; margin: 30px 0 0; color: var(--secondary); font-size: clamp(18px, 2vw, 23px); line-height: 1.5; letter-spacing: -.015em; }
.trust-list { display: grid; gap: 13px; margin: 0; padding: 0; list-style: none; color: var(--secondary); font-size: 14px; }
.trust-list li { display: flex; align-items: center; gap: 11px; }
.trust-list span { width: 7px; height: 7px; border-radius: 50%; background: var(--ink); }

.login-card { align-self: center; padding: clamp(30px, 4vw, 48px); border: 1px solid var(--line); border-radius: 18px; background: var(--surface); }
.login-card h2 { margin: 0; font-size: 32px; line-height: 1.1; letter-spacing: -.035em; font-weight: 600; }
.card-copy { margin: 12px 0 30px; color: var(--secondary); line-height: 1.55; }
form { display: grid; }
label { margin: 18px 0 8px; font-size: 13px; font-weight: 600; }
input { width: 100%; min-height: 48px; padding: 0 14px; border: 1px solid #b7b7bc; border-radius: 10px; background: #fff; color: var(--ink); outline: none; transition: border-color 160ms ease, box-shadow 160ms ease; }
input:focus { border-color: var(--ink); box-shadow: 0 0 0 3px rgba(29, 29, 31, .11); }
.primary-button, .preview-button { width: 100%; min-height: 50px; margin-top: 20px; border-radius: 10px; font-weight: 650; cursor: pointer; }
.primary-button { display: flex; align-items: center; justify-content: space-between; padding: 0 17px; border: 1px solid var(--ink); background: var(--ink); color: white; }
.primary-button:hover { background: #000; }
.primary-button:disabled { opacity: .55; cursor: wait; }
.preview-button { border: 1px solid var(--line); background: var(--recessed); color: var(--ink); }
.preview-button:hover { border-color: #9b9ba0; background: #e9e9ec; }
.message { min-height: 20px; margin: 12px 0 -6px; color: var(--danger); font-size: 13px; line-height: 1.45; }
.forgot-link { display: inline-block; margin-top: 22px; color: var(--secondary); font-size: 13px; text-underline-offset: 4px; }
.security-note { margin: 28px 0 0; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; line-height: 1.55; }
.invite-summary { display: grid; gap: 0; margin: 0 0 14px; border: 1px solid var(--line); border-radius: 11px; background: var(--recessed); }
.invite-summary > div { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 13px 14px; }
.invite-summary > div + div { border-top: 1px solid var(--line); }
.invite-summary span { color: var(--muted); font-size: 12px; }
.invite-summary strong { font-size: 13px; font-weight: 600; text-align: right; }
.invite-error { color: var(--danger); }

@media (max-width: 840px) {
  .login-shell { grid-template-columns: 1fr; width: min(620px, calc(100% - 32px)); padding: 30px 0 48px; }
  .login-intro { min-height: auto; gap: 70px; }
  .trust-list { display: none; }
  .intro-copy h1 { font-size: clamp(52px, 14vw, 74px); }
}

@media (prefers-reduced-motion: reduce) { * { transition-duration: .01ms !important; } }