:root {
  --bg-color: #f3f4f6;
  --text-color: #1f2937;
  --surface-color: #ffffff;
  --border-color: #e5e7eb;
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;
}

body.dark-mode {
  color-scheme: dark;
  --bg-color: #111827;
  --text-color: #f9fafb;
  --surface-color: #1f2937;
  --border-color: #374151;
  --primary-color: #3b82f6;
  --primary-hover: #60a5fa;
  --warning-color: #f57c00;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s;
  z-index: 1000;
}

#theme-toggle:hover {
  transform: scale(1.1);
}

.home-container, .auth-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 2rem;
}

.branding {
  text-align: center;
  margin-bottom: 3rem;
}

.branding h1 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.login-options {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.card-option {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  width: 300px;
  text-align: center;
  text-decoration: none;
  color: var(--text-color);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.card-option:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  border-color: var(--primary-color);
}

.card-option h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* Formulários */
.auth-box {
  background-color: var(--surface-color);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
}

.auth-box h2 {
  text-align: center;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
}

.btn {
  display: inline-block;
  width: 100%;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.auth-links {
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.9rem;
}

/* Modal Changelog */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}
.modal-content {
    background: var(--surface-color);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    overflow-y: auto;
    position: relative;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}
.modal-overlay.active .modal-content {
    transform: translateY(0);
}
.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    background: none;
    border: none;
    color: var(--text-color);
}
.changelog-btn {
    position: fixed;
    top: 20px;
    right: 70px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 20px;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 999;
}

.auth-links a {
  color: var(--primary-color);
  text-decoration: none;
}

.auth-links a:hover {
  text-decoration: underline;
}

/* Alertas */
.alert {
  padding: 1rem;
  border-radius: 6px;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.alert-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: #065f46; /* Verde escuro no modo claro para melhor leitura */
  border: 1px solid rgba(16, 185, 129, 0.2);
}

body.dark-mode .alert-success {
  color: var(--success-color);
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--warning-color);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

@media (max-width: 768px) {
  .login-options {
    flex-direction: column;
  }
  .card-option {
    width: 100%;
  }
}


/* Select options fix */
select option { background: var(--bg-surface); color: var(--text-color); }