:root {
  --primary: #007bff;
  --secondary: #6c757d;
  --background: #f0f2f5;
  --text: #333;
  --card-bg: #ffffff;
  --shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  --border-radius: 8px;
  --success: #28a745;
  --danger: #dc3545;
  --warning: #ffc107; /* Adicionado para notificações de aviso */
  --transition: all 0.3s ease;
  --input-border: #ced4da; /* Adicionado para bordas de inputs */
}

body.dark-theme {
  --background: #1a1a1a;
  --text: #e0e0e0;
  --card-bg: #2c2c2c;
  --primary: #1e90ff;
  --secondary: #adb5bd;
  --input-border: #495057;
}

/* Suporte a preferência de tema do sistema */
@media (prefers-color-scheme: dark) {
  body:not(.dark-theme) {
    --background: #1a1a1a;
    --text: #e0e0e0;
    --card-bg: #2c2c2c;
    --primary: #1e90ff;
    --secondary: #adb5bd;
    --input-border: #495057;
  }
}

body {
  font-family: system-ui, -apple-system, Arial, sans-serif; /* Fontes modernas */
  background: var(--background);
  color: var(--text);
  margin: 0;
  padding: 0;
  line-height: 1.6;
  transition: var(--transition);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 25px;
  background: var(--card-bg);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 10;
}

#menu-toggle,
#theme-toggle,
#lock-btn {
  font-size: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  transition: var(--transition);
}

#menu-toggle:hover,
#theme-toggle:hover,
#lock-btn:hover {
  background: var(--primary);
  color: white;
  border-radius: var(--border-radius);
}

#current-tab {
  font-size: 20px;
  font-weight: bold;
}

.sidebar {
  position: fixed;
  top: 0;
  left: -250px;
  width: 250px;
  height: 100%;
  background: var(--card-bg);
  box-shadow: var(--shadow);
  padding-top: 80px;
  box-sizing: border-box;
  overflow-y: auto;
  transition: left var(--transition);
  z-index: 99;
}

.sidebar.open {
  left: 0;
}

.sidebar nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.menu-item {
  display: block;
  padding: 18px 25px;
  font-size: 16px;
  cursor: pointer;
  transition: var(--transition);
  word-break: break-word;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.menu-item:hover,
.menu-item.active {
  background: var(--primary);
  color: white;
}

main {
  padding: 30px 20px;
  transition: margin-left var(--transition);
  max-width: 900px;
  margin: 0 auto;
  box-sizing: border-box;
}

main.sidebar-open {
  margin-left: 250px;
}

section {
  margin-top: 40px;
}

.hidden {
  display: none !important;
}

.auth-box {
  background: var(--card-bg);
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  max-width: 400px;
  margin: 0 auto;
}

.password-form,
.auth-buttons,
#settings-form {
  display: flex;
  flex-direction: column;
  gap: 15px;
  width: 100%;
  margin: 20px 0;
}

#settings-form label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
}

#settings-form select {
  padding: 10px;
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius);
  background: var(--card-bg);
  color: var(--text);
}

input[type="password"],
input[type="text"],
input[type="email"],
input[type="file"] { /* Adicionado suporte a input de arquivo */
  padding: 12px;
  font-size: 15px;
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius);
  width: 100%;
  background: var(--card-bg);
  color: var(--text);
  box-sizing: border-box;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
}

button {
  padding: 12px;
  border: none;
  border-radius: var(--border-radius);
  font-size: 15px;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-secondary {
  background-color: var(--secondary);
  color: white;
}

button:hover {
  opacity: 0.9;
}

button:focus {
  outline: none;
  box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
}

.password-item {
  background: var(--card-bg);
  box-shadow: var(--shadow);
  border-radius: var(--border-radius);
  padding: 15px;
  margin: 15px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.password-item:hover {
  transform: translateY(-2px);
}

#password-list,
#trash-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.error-message {
  color: var(--danger);
  font-size: 14px;
  margin-top: 10px;
  text-align: center;
}

.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 15px 25px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  z-index: 1000;
  font-size: 14px;
}

.notification.success {
  background: var(--success);
  color: white;
}

.notification.error {
  background: var(--danger);
  color: white;
}

.notification.warning {
  background: var(--warning);
  color: var(--text);
}

.close-btn {
  background: none;
  border: none;
  color: inherit;
  font-size: 16px;
  cursor: pointer;
}

.beta-notice,
.donation {
  font-size: 13px;
  margin-top: 10px;
  color: var(--secondary);
  text-align: center;
}

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

.donation a:hover {
  text-decoration: underline;
}

#qrcode {
  margin: 20px 0;
  text-align: center;
}

#qrcode canvas {
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius);
  max-width: 100%;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 768px) {
  main.sidebar-open {
    margin-left: 0;
  }

  .sidebar {
    width: 100%;
    left: -100%;
  }

  .sidebar.open {
    left: 0;
  }

  .auth-box {
    max-width: 100%;
  }

  input[type="password"],
  input[type="text"],
  input[type="email"],
  input[type="file"] {
    font-size: 16px; /* Aumenta tamanho para toque */
  }

  button {
    font-size: 16px;
  }
}