:root {
  --pta-primary-dark: #2f5d50;
  --pta-primary-hover: #274d43;
  --pta-primary-sage: #5f8f79;
  --pta-primary-soft: #eaf4ee;
  --pta-surface: #f8faf7;
  --pta-white: #ffffff;
  --pta-text: #24332d;
  --pta-muted: #6b7b74;
  --pta-border: #dce7e1;
  --pta-success: #3b7a57;
  --pta-warning: #9a6e17;
  --pta-danger: #b94d4d;
  --pta-shadow: 0 18px 45px rgba(36, 51, 45, 0.10);
  --pta-radius-lg: 24px;
  --pta-radius-md: 14px;
  --pta-focus: 0 0 0 3px rgba(95, 143, 121, 0.18);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--pta-text);
  background: var(--pta-surface);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--pta-primary-dark); }
h1, h2, h3 { margin-top: 0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.2; }
button, input, select, textarea { font: inherit; }

.pta-keu-skip-link {
  position: fixed;
  z-index: 9999;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--pta-primary-dark);
  color: #fff;
  transform: translateY(-160%);
}
.pta-keu-skip-link:focus { transform: translateY(0); }
.pta-keu-container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }

.pta-keu-login-shell {
  min-height: calc(100vh - 64px);
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(420px, 0.92fr);
}
.pta-keu-brand-panel {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: clamp(48px, 7vw, 112px);
  background: linear-gradient(145deg, #244b40 0%, #2f5d50 52%, #5f8f79 100%);
  color: #fff;
}
.pta-keu-brand-panel::before,
.pta-keu-brand-panel::after {
  position: absolute;
  content: "";
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
}
.pta-keu-brand-panel::before { width: 420px; height: 420px; top: -190px; right: -150px; }
.pta-keu-brand-panel::after { width: 280px; height: 280px; bottom: -120px; left: -70px; }
.pta-keu-brand-content { position: relative; z-index: 1; max-width: 650px; }
.pta-keu-logo-wrap { margin-bottom: 28px; }
.pta-keu-logo-wrap img { width: auto; max-width: 92px; max-height: 92px; }
.pta-keu-logo-mark {
  display: inline-grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border: 1px solid rgba(255, 255, 255, .32);
  border-radius: 20px;
  background: rgba(255, 255, 255, .12);
  font: 700 18px/1 Inter, ui-sans-serif, system-ui, sans-serif;
  letter-spacing: .08em;
}
.pta-keu-eyebrow { margin: 0 0 10px; color: var(--pta-primary-sage); font-weight: 700; letter-spacing: .12em; text-transform: uppercase; font-size: .78rem; }
.pta-keu-brand-panel .pta-keu-eyebrow { color: #cfe5d8; }
.pta-keu-brand-panel h1 { max-width: 680px; margin-bottom: 20px; font-size: clamp(2rem, 4.6vw, 4rem); letter-spacing: -.04em; }
.pta-keu-lead { max-width: 620px; margin: 0; color: rgba(255, 255, 255, .82); font-size: clamp(1rem, 1.5vw, 1.18rem); }
.pta-keu-benefits { display: grid; gap: 12px; margin: 34px 0 0; padding: 0; list-style: none; }
.pta-keu-benefits li { display: flex; gap: 10px; align-items: center; color: rgba(255, 255, 255, .92); }
.pta-keu-benefits li::before { content: "✓"; display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; background: rgba(255,255,255,.14); color: #dff1e6; font-weight: 700; }

.pta-keu-login-panel { display: grid; place-items: center; padding: clamp(28px, 6vw, 88px); background: var(--pta-surface); }
.pta-keu-login-card { width: min(100%, 480px); padding: clamp(28px, 4vw, 48px); border: 1px solid var(--pta-border); border-radius: var(--pta-radius-lg); background: var(--pta-white); box-shadow: var(--pta-shadow); }
.pta-keu-card-heading { margin-bottom: 28px; }
.pta-keu-card-heading h2 { margin-bottom: 10px; font-size: clamp(1.65rem, 3vw, 2.2rem); letter-spacing: -.025em; }
.pta-keu-card-heading > p:last-child, .pta-keu-help { color: var(--pta-muted); }
.pta-keu-help { margin: 24px 0 0; font-size: .9rem; text-align: center; }

.pta-keu-form { display: grid; gap: 18px; }
.pta-keu-field { display: grid; gap: 7px; }
.pta-keu-field label { font-size: .92rem; font-weight: 700; }
.pta-keu-input-wrap { position: relative; }
.pta-keu-input {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  border: 1px solid #cddbd4;
  border-radius: 12px;
  outline: none;
  background: #fff;
  color: var(--pta-text);
  transition: border-color 120ms ease, box-shadow 120ms ease;
}
.pta-keu-input:focus { border-color: var(--pta-primary-sage); box-shadow: var(--pta-focus); }
.pta-keu-input[aria-invalid="true"] { border-color: var(--pta-danger); }
.pta-keu-password-input { padding-right: 104px; }
.pta-keu-password-toggle { position: absolute; top: 50%; right: 10px; border: 0; background: transparent; color: var(--pta-primary-dark); font-weight: 700; transform: translateY(-50%); cursor: pointer; }
.pta-keu-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 20px;
  border: 0;
  border-radius: 12px;
  background: var(--pta-primary-dark);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(47, 93, 80, .18);
  transition: background-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}
.pta-keu-button:hover { background: var(--pta-primary-hover); transform: translateY(-1px); box-shadow: 0 12px 24px rgba(47, 93, 80, .24); }
.pta-keu-button:focus-visible, .pta-keu-password-toggle:focus-visible, a:focus-visible { outline: none; box-shadow: var(--pta-focus); }
.pta-keu-button[disabled] { opacity: .58; cursor: wait; transform: none; }
.pta-keu-notice { margin-bottom: 18px; padding: 12px 14px; border: 1px solid var(--pta-border); border-radius: 10px; background: var(--pta-primary-soft); font-size: .92rem; }
.pta-keu-notice--error { border-color: #efcaca; background: #fff1f1; color: #8f3737; }
.pta-keu-notice--warning { border-color: #ead8ae; background: #fff9e9; color: #7a5915; }
.pta-keu-notice--success { border-color: #c7dfd0; background: #eef8f1; color: #2e6646; }
.pta-keu-content { min-height: calc(100vh - 120px); padding-block: 56px; }
.pta-keu-content-card { padding: clamp(24px, 4vw, 48px); border: 1px solid var(--pta-border); border-radius: var(--pta-radius-lg); background: #fff; box-shadow: 0 12px 34px rgba(36,51,45,.06); }
.pta-keu-footer { padding: 20px 0; border-top: 1px solid var(--pta-border); color: var(--pta-muted); font-size: .88rem; }
.pta-keu-footer p { margin: 0; }

@media (max-width: 900px) {
  .pta-keu-login-shell { grid-template-columns: 1fr; }
  .pta-keu-brand-panel { min-height: 380px; padding: 56px 32px; }
  .pta-keu-login-panel { padding: 40px 20px 56px; }
}
@media (max-width: 520px) {
  .pta-keu-brand-panel { min-height: auto; padding: 42px 22px; }
  .pta-keu-brand-panel h1 { font-size: 2rem; }
  .pta-keu-benefits { display: none; }
  .pta-keu-login-card { padding: 26px 20px; border-radius: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  .pta-keu-button:hover { transform: none; }
}
@media print {
  .pta-keu-footer, .pta-keu-button, .pta-keu-password-toggle { display: none !important; }
  body { background: #fff; color: #000; }
  .pta-keu-content-card { border: 0; box-shadow: none; padding: 0; }
}