:root {
  --teal: #12a182;
  --teal-dark: #0e8568;
  --petrol: #1a3d47;
  --petrol-soft: #2d5a66;
  --bg: #f4f6f8;
  --panel: #ffffff;
  --text: #1e3238;
  --text-muted: #5a7279;
  --border: rgba(26, 61, 71, 0.14);
  --error: #d93025;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.platform-login-shell {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
}

@media (max-width: 860px) {
  .platform-login-shell { grid-template-columns: 1fr; }
  .platform-login-aside { display: none; }
}

.platform-login-panel {
  padding: 2.5rem 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 480px;
  margin: 0 auto;
  width: 100%;
}

.platform-login-aside {
  background: linear-gradient(145deg, var(--petrol) 0%, #0f2830 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
}

.aside-inner h2 {
  margin: 0 0 0.75rem;
  font-size: 2rem;
  color: var(--teal);
}

.aside-inner p {
  margin: 0;
  opacity: 0.9;
  line-height: 1.5;
  max-width: 320px;
}

.brand-row {
  margin-bottom: 2rem;
  font-size: 1.2rem;
  font-weight: 700;
}

.brand-evan { color: var(--petrol); }
.brand-ia { color: var(--teal); }
.brand-product {
  margin-left: 0.65rem;
  padding-left: 0.65rem;
  border-left: 2px solid var(--border);
  color: var(--petrol-soft);
  font-weight: 600;
  font-size: 0.95rem;
}

h1 {
  margin: 0 0 0.35rem;
  font-size: 1.75rem;
  color: var(--petrol);
}

.intro {
  margin: 0 0 1.75rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

label {
  display: block;
  margin-bottom: 1.1rem;
  font-size: 0.88rem;
  font-weight: 600;
}

input {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
}

input.invalid { border-color: var(--error); }

.password-wrap {
  position: relative;
}

.password-wrap input { padding-right: 2.5rem; }

.toggle-pw {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  margin-top: 0.2rem;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 1rem;
}

.field-error, .form-error {
  color: var(--error);
  font-size: 0.82rem;
  font-weight: 500;
  margin-top: 0.35rem;
}

.hidden { display: none !important; }

.captcha-block { margin-bottom: 1rem; }

#btn-login {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.75rem;
  border: none;
  border-radius: 8px;
  background: var(--petrol);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

#btn-login:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

#btn-login:not(:disabled):hover {
  background: var(--petrol-soft);
}

.footer-note {
  margin-top: 2rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.mfa-intro { margin-top: 0; }

.mfa-qr-wrap {
  display: flex;
  justify-content: center;
  margin: 1rem 0;
}

#mfa-qr {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem;
  background: #fff;
}

.mfa-secret-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0 0 0.35rem;
}

.mfa-manual-secret {
  display: block;
  word-break: break-all;
  font-size: 0.85rem;
  padding: 0.5rem 0.65rem;
  background: #eef2f4;
  border-radius: 6px;
  margin-bottom: 1rem;
}

#btn-mfa-verify,
#btn-mfa-enroll {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.75rem;
  border: none;
  border-radius: 8px;
  background: var(--petrol);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

#btn-mfa-verify:disabled,
#btn-mfa-enroll:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-link-back {
  display: block;
  width: 100%;
  margin-top: 0.75rem;
  padding: 0.5rem;
  border: none;
  background: transparent;
  color: var(--petrol-soft);
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: underline;
}

#mfa-code,
#mfa-enroll-code {
  letter-spacing: 0.25em;
  font-size: 1.25rem;
  text-align: center;
}