.signin-body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, sans-serif;
  background: radial-gradient(circle at top left, #2b3555, #0f1528 55%, #090e1c);
  color: #f3f6ff;
}

.signin-shell {
  width: min(980px, 94vw);
  margin: 0 auto;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 20px;
  align-items: center;
}

.signin-brand {
  padding: 12px;
}

.signin-brand-logo {
  width: 72px;
  height: 72px;
}

.signin-brand h1 {
  margin: 18px 0 10px;
  font-size: clamp(1.5rem, 2vw, 2rem);
  letter-spacing: 0.04em;
}

.signin-brand p {
  margin: 0;
  color: #c7d2ff;
  max-width: 36ch;
}

.signin-card {
  background: rgba(10, 15, 30, 0.92);
  border: 1px solid rgba(120, 140, 200, 0.35);
  border-radius: 16px;
  padding: 26px 24px;
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.45);
}

.signin-card h2 {
  margin: 0 0 6px;
}

.signin-subtitle {
  margin: 0 0 16px;
  color: #b9c6ef;
}

.signin-form {
  display: grid;
  gap: 10px;
}

.signin-form label {
  font-size: 0.9rem;
  color: #d4ddf8;
}

.signin-form input {
  border: 1px solid #3d4e80;
  border-radius: 10px;
  padding: 10px 12px;
  background: #131c35;
  color: #f3f6ff;
}

.signin-form input:focus {
  outline: 2px solid #7f9dff;
  outline-offset: 0;
}

.btn-signin {
  margin-top: 8px;
  border: 0;
  border-radius: 10px;
  padding: 11px 14px;
  cursor: pointer;
  background: #3f67f2;
  color: #fff;
  font-weight: 700;
}

.btn-signin:disabled {
  opacity: 0.7;
  cursor: wait;
}

.signin-error {
  margin-bottom: 12px;
  border-radius: 10px;
  border: 1px solid rgba(255, 105, 135, 0.6);
  background: rgba(136, 30, 62, 0.45);
  color: #ffd4df;
  padding: 9px 10px;
  font-size: 0.9rem;
}

/* Password visibility toggle */
.pw-field-wrap {
  position: relative;
}

.pw-field-wrap .auth-input {
  padding-right: 44px;
}

.pw-toggle-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: #3f67f2;
  padding: 0;
  display: flex;
  align-items: center;
  line-height: 1;
  transition: color 0.15s;
}

.pw-toggle-btn:hover {
  color: #3f67f2
}

#passwordInput {
  width: 100%;
}
@media (max-width: 840px) {
  .signin-shell {
    grid-template-columns: 1fr;
    align-content: center;
    padding: 20px 0;
  }
}