/* Variables globales */
:root {
  --primary-color: #4a6fa5;
  --primary-hover: #3a5a80;
  --secondary-color: #6c757d;
  --light-bg: #f8f9fa;
  --dark-bg: #343a40;
  --success-color: #28a745;
  --error-color: #dc3545;
  --border-radius: 4px;
  --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
  --text-color: #333;
  --background-color: #f8f9fa;
  --card-bg: white;
  --code-bg: #f8f8f8;
  --border-color: #ddd;
  --download-btn-bg: #3273dc;
  --download-btn-active: #48c774;
  --reset-btn-bg: #f14668;
}

[data-theme="dark"] {
  --primary-color: #5b8dd6;
  --primary-hover: #6c9aea;
  --light-bg: #222;
  --dark-bg: #111;
  --text-color: #f0f0f0;
  --background-color: #222;
  --card-bg: #333;
  --code-bg: #2d2d2d;
  --border-color: #444;
}

/* Estilos generales */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
  padding: 0;
  margin: 0;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3 {
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

/* Cabecera */
header {
  background-color: var(--primary-color);
  color: white;
  padding: 2rem 1rem;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  position: relative;
}

header h1 {
  color: white;
  margin-bottom: 0.5rem;
}

header p {
  opacity: 0.9;
}

/* Theme Toggler */
.theme-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  transition: var(--transition);
}

.theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.theme-toggle svg {
  width: 24px;
  height: 24px;
  fill: white;
}

/* Secciones principales */
main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.input-section, .results-section {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--box-shadow);
  transition: background-color 0.3s ease;
}

/* Sección de entrada de archivos/código */
.file-input-container {
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
}

.file-label {
  background-color: var(--primary-color);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  display: inline-block;
}

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

input[type="file"] {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.or-divider {
  text-align: center;
  margin: 1rem 0;
  font-weight: bold;
  color: var(--secondary-color);
}

.code-input-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

textarea {
  width: 100%;
  min-height: 200px;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-family: monospace;
  resize: vertical;
  background-color: var(--card-bg);
  color: var(--text-color);
  transition: var(--transition);
}

/* Botones */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 600;
}

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

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

.reset-btn {
  background-color: var(--reset-btn-bg);
  color: white;
  margin-top: 1rem;
}

.reset-btn:hover {
  filter: brightness(110%);
}

/* Sección de resultados */
.results-section {
  display: none;
}

.results-section.active {
  display: block;
}

.code-viewers {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .code-viewers {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

.code-viewer {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.viewer-header {
  background-color: var(--code-bg);
  padding: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.3s ease;
}

.download-btn {
  background-color: var(--download-btn-bg);
  color: white;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
}

.download-btn:hover {
  filter: brightness(90%);
}

.code-output {
  max-height: 300px;
  overflow-y: auto;
  padding: 1rem;
  background-color: var(--code-bg);
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9rem;
  white-space: pre-wrap;
  word-wrap: break-word;
  margin: 0;
  outline: none;
  border: 1px solid transparent;
  transition: var(--transition);
  color: var(--text-color);
}

.code-output:focus {
  border-color: var(--primary-color);
  background-color: var(--card-bg);
}

.code-output:hover:not(:focus) {
  border-color: var(--border-color);
}

/* Notificaciones */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 15px 20px;
  border-radius: var(--border-radius);
  color: white;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  transform: translateX(110%);
  transition: transform 0.3s ease-in-out;
  z-index: 1000;
}

.notification.show {
  transform: translateX(0);
}

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

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

/* Footer */
footer {
  text-align: center;
  padding: 2rem 1rem;
  background-color: var(--dark-bg);
  color: white;
  margin-top: 2rem;
}

/* Animaciones y estados */
.shake {
  animation: shake 0.5s ease-in-out;
}

@keyframes shake {
  0%, 100% {transform: translateX(0);}
  20%, 60% {transform: translateX(-5px);}
  40%, 80% {transform: translateX(5px);}
}