:root {
  --bg-color: #ffffff;
  --text-color: #000000;
  --card-bg: #ffffff;
  --border-color: #000000;
  --btn-hover: #000000;
  --btn-hover-text: #ffffff;
}

[data-theme="dark"] {
  --bg-color: #000000;
  --text-color: #ffffff;
  --card-bg: #000000;
  --border-color: #ffffff;
  --btn-hover: #ffffff;
  --btn-hover-text: #000000;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 2px solid var(--border-color);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.app-logo {
  width: 32px;
  height: 32px;
  filter: invert(var(--logo-invert, 0));
}

[data-theme="dark"] .app-logo {
  --logo-invert: 1;
}

.app-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
  max-width: 600px;
  width: 100%;
  margin: 0 auto;
}

.card-container {
  width: 100%;
  background-color: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin-bottom: 2rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.card-text {
  font-size: 1.25rem;
  line-height: 1.6;
  font-weight: 500;
}

.actions-container {
  display: flex;
  gap: 1.5rem;
}

.icon-btn, .action-btn {
  background: transparent;
  color: var(--text-color);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.action-btn {
  width: 64px;
  height: 64px;
  border-radius: 16px;
}

.icon-btn:hover, .action-btn:hover {
  background-color: var(--btn-hover);
  color: var(--btn-hover-text);
}

/* Controle de exibição dos ícones de tema */
[data-theme="dark"] .moon-icon {
  display: none;
}
:root:not([data-theme="dark"]) .sun-icon {
  display: none;
}

.toast {
  position: fixed;
  bottom: 2rem;
  background-color: var(--text-color);
  color: var(--bg-color);
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 480px) {
  .card-container {
    padding: 1.5rem 1rem;
    min-height: 160px;
  }
  .card-text {
    font-size: 1.1rem;
  }
}