:root {
  --green:   #96e530;
  --accent:  #4B39EF;
  --dark:    #222;
  --bg:      #fff;
  --text:    #333;
  --error:   #e53e3e;
  --transition: 0.3s ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Inter', sans-serif;
  background: #f2f4f6;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.top-menu {
  background-color: var(--green);
  padding: 12px 24px;
  display: flex;
  align-items: center;
}
.top-menu .logo { width: 40px; height: 40px; border-radius: 8px; }
.top-menu .titulo {
  color: var(--bg); font-size: 1.25rem; margin-left: 12px;
}

.login-container {
  background: var(--bg);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  max-width: 360px;
  width: 90%;
  margin: auto;
  padding: 32px 24px;
  animation: fadeIn 0.5s ease;
}
.login-container h2 {
  text-align: center;
  margin-bottom: 24px;
  font-size: 1.5rem;
  color: var(--accent);
}

.field-group {
  margin-bottom: 16px;
}
.field-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
}
.field-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color var(--transition);
}
.field-group input:focus {
  outline: none;
  border-color: var(--accent);
}

.password-group .password-wrapper {
  position: relative;
}
.toggle-pw {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
}

.error {
  color: var(--error);
  font-size: 0.85rem;
  height: 1rem;
  margin-top: 4px;
}

.btn-submit {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--green);
  color: #fff;
  border: none;
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}
.btn-submit:hover { background: #7ac61f; }
.btn-submit:disabled { opacity: 0.6; cursor: default; }
.btn-spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 3px solid #fff;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
.btn-text { display: inline-block; }

.register {
  text-align: center;
  margin-top: 16px;
  font-size: 0.9rem;
}
.register a { color: var(--accent); text-decoration: none; }
.register a:hover { text-decoration: underline; }

@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive tweak */
@media (max-width: 400px) {
  .login-container { padding: 24px 16px; }
}