:root {
  --primary: #4F46E5;
  --primary-hover: #4338CA;
  --gray-900: #111827;
  --gray-800: #1F2937;
  --gray-700: #374151;
  --gray-600: #4B5563;
  --gray-500: #6B7280;
  --gray-400: #9CA3AF;
  --gray-300: #D1D5DB;
  --gray-200: #E5E7EB;
  --gray-100: #F3F4F6;
  --gray-50: #F9FAFB;
  --white: #FFFFFF;
  --error: #EF4444;
  --success: #10B981;
}

/* Reset e estilos base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 400px;
  min-height: 500px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--white);
  color: var(--gray-900);
}

/* Layout */
.container {
  padding: 2rem;
}

.header {
  display: flex;
  align-items: center;
  margin-bottom: 2rem;
}

.logo {
  height: 2rem;
  width: auto;
}

.version {
  margin-left: 0.5rem;
  font-size: 0.875rem;
  color: var(--gray-500);
}

.title {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 2rem;
}

/* Formulários */
.form-group {
  margin-bottom: 1.5rem;
}

.label {
  display: block;
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 0.5rem;
}

.input-with-icon {
  position: relative;
}

.input {
  width: 100%;
  padding: 0.625rem 1rem;
  padding-left: 2.5rem;
  border: 1px solid var(--gray-300);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: all 0.2s;
}

.input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.1);
}

.input-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  pointer-events: none;
}

.icon {
  width: 1.25rem;
  height: 1.25rem;
}

/* Botões */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1rem;
  border-radius: 0.5rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary {
  width: 100%;
  background-color: var(--primary);
  color: var(--white);
  font-size: 1.125rem;
  font-weight: 600;
  padding: 0.75rem;
  margin-top: 1rem;
}

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

.btn-primary:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.5);
}

.btn-icon {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  padding: 0.25rem;
}

.btn-icon:hover {
  color: var(--gray-600);
}

/* Links */
.link {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s;
  display: inline-block;
  margin-top: 0.5rem;
}

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

/* Footer */
.footer {
  text-align: center;
  margin-top: 1.5rem;
  color: var(--gray-600);
}

/* Navegação */
.nav {
  display: flex;
  align-items: center;
  padding: 1rem;
  background-color: var(--white);
  border-bottom: 1px solid var(--gray-200);
}

.nav-item {
  padding: 0.5rem 1rem;
  color: var(--gray-700);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.nav-item.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Utilitários */
.hidden {
  display: none;
}

.flex {
  display: flex;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

/* Estados */
.disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Área logada */
#loggedInSection {
  background-color: var(--gray-50);
}

/* Formulário de post */
.post-form {
  background: var(--white);
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Campos somente leitura */
.input[readonly] {
  background-color: var(--gray-50);
  cursor: not-allowed;
}

/* Responsividade */
@media (max-width: 400px) {
  body {
    width: 100%;
  }
  
  .container {
    padding: 1rem;
  }
}