/* ============================================================
   css/main.css
   Estilos base, variables, layout principal, tipografía
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;700&display=swap');

/* ============================================================
   VARIABLES CSS
   ============================================================ */
:root {
  /* Colores principales */
  --color-primary: #ff007f;
  --color-secondary: #00ffff;
  --color-bg-dark: #000;
  --color-bg-panel: rgba(0, 0, 0, 0.9);
  --color-text: #fff;
  --color-error: #f87171;
  --color-success: #4ade80;
  --color-warning: #fb923c;
  --color-info: #a855f7;
  --color-time: #facc15;

  /* Espaciado */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Transiciones */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Bordes */
  --border-radius: 0.75rem;
  --border-radius-sm: 0.5rem;
  --border-width: 2px;

  /* Sombras */
  --shadow-neon-primary: 0 0 10px var(--color-primary),
    0 0 20px rgba(255, 0, 127, 0.5);
  --shadow-neon-secondary: 0 0 10px var(--color-secondary),
    0 0 20px rgba(0, 255, 255, 0.5);
}

/* ============================================================
   RESET Y BASE
   ============================================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--color-bg-dark);
  color: var(--color-text);
  overflow-x: hidden;
  overflow-y: auto;
  min-height: 100vh;
}

/* ============================================================
   LAYOUT PRINCIPAL
   ============================================================ */
.app-container {
  position: relative;
  z-index: 10;
  max-width: 1200px;
  margin: 5vh auto;
  margin-left: calc(50% - 600px + 140px);
  padding: var(--spacing-xl);
  border: 3px solid transparent;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-neon-primary);
  backdrop-filter: blur(8px);
  background-color: rgba(0, 0, 0, 0.7);
  transition: all var(--transition-normal);
}

.app-container:hover {
  box-shadow: 0 0 30px rgba(255, 0, 127, 0.7);
}

/* Responsive */
@media (max-width: 768px) {
  .app-container {
    margin: 2vh 1rem;
    padding: var(--spacing-md);
  }
}

/* ============================================================
   TÍTULO
   ============================================================ */
.app-title {
  font-size: 2.5rem;
  font-weight: bold;
  text-align: center;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
  text-shadow: 0 0 10px var(--color-primary);
}

@media (max-width: 768px) {
  .app-title {
    font-size: 2rem;
  }
}

/* ============================================================
   MÉTRICAS
   ============================================================ */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  border: 1px solid #374151;
  border-radius: var(--border-radius-sm);
  background-color: rgba(0, 0, 0, 0.5);
}

@media (max-width: 768px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }
}

.metric-item {
  text-align: center;
}

.metric-label {
  font-size: 0.875rem;
  color: #9ca3af;
  margin-bottom: var(--spacing-xs);
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.metric-value {
  font-size: 2rem;
  font-family: 'Courier New', monospace;
  font-weight: bold;
}

#wpm {
  color: var(--color-secondary);
  text-shadow: 0 0 5px var(--color-secondary);
}

#cpm {
  color: var(--color-info);
  text-shadow: 0 0 5px var(--color-info);
}

#errors {
  color: var(--color-error);
  text-shadow: 0 0 5px var(--color-error);
}

#error-percent {
  color: var(--color-warning);
  text-shadow: 0 0 5px var(--color-warning);
}

#timer {
  color: var(--color-time);
  text-shadow: 0 0 5px var(--color-time);
}

/* ============================================================
   ÁREA DE TEXTO OBJETIVO
   ============================================================ */
.text-display {
  min-height: 150px;
  max-height: 400px;
  height: 400px;
  overflow-y: auto;
  padding: var(--spacing-md);
  font-size: 1.25rem;
  line-height: 1.8;
  letter-spacing: 0.05em;
  border-radius: var(--border-radius);
  background-color: rgba(255, 255, 255, 0.05);
  border: var(--border-width) solid var(--color-primary);
  box-shadow: var(--shadow-neon-primary);
  color: var(--color-text);
  white-space: pre-wrap;
  overflow-wrap: break-word;
  position: relative;
  transition: opacity var(--transition-normal);
  margin-bottom: var(--spacing-md);
}

@media (max-width: 768px) {
  .text-display {
    font-size: 1rem;
    height: 300px;
  }
}

/* Scrollbar personalizado */
.text-display::-webkit-scrollbar {
  width: 8px;
}

.text-display::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

.text-display::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 4px;
}

.text-display::-webkit-scrollbar-thumb:hover {
  background: #ff3399;
}

/* Título del texto */
.text-title {
  margin-bottom: var(--spacing-md);
  font-size: 1.1rem;
  color: var(--color-secondary);
  font-weight: bold;
}

/* ============================================================
   ÁREA DE ENTRADA (USUARIO)
   ============================================================ */
.text-input {
  width: 100%;
  min-height: 100px;
  padding: var(--spacing-md);
  font-size: 1.25rem;
  line-height: 1.8;
  font-family: 'Inter', sans-serif;
  border-radius: var(--border-radius);
  background-color: rgba(17, 17, 17, 0.9);
  border: var(--border-width) solid var(--color-primary);
  box-shadow: var(--shadow-neon-primary);
  color: var(--color-text);
  resize: vertical;
  caret-color: var(--color-secondary);
  transition: all var(--transition-normal);
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

.text-input:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
  background-color: #111;
}

.text-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

@media (max-width: 768px) {
  .text-input {
    font-size: 1rem;
    min-height: 80px;
  }
}

/* ============================================================
   ESTADOS DE CARACTERES
   ============================================================ */
.correct {
  color: var(--color-success);
}

.incorrect {
  color: var(--color-error);
  text-decoration: underline;
}

.current {
  background-color: rgba(0, 255, 255, 0.3);
  border-bottom: 2px solid var(--color-secondary);
  position: relative;
}

/* ============================================================
   CARACTERES ESPECIALES (SALTOS DE LÍNEA)
   ============================================================ */
span[data-char="newline"] {
  display: inline-block;
  background-color: rgba(0, 255, 255, 0.1);
  border-left: 3px solid var(--color-secondary);
  padding: 0 var(--spacing-sm);
  margin-right: var(--spacing-sm);
}

span[data-char="newline"].current::after {
  content: " ↵ Presiona Enter";
  padding: 0.25rem 0.75rem;
  background-color: rgba(0, 255, 255, 0.9);
  color: #000;
  font-size: 0.875rem;
  font-weight: bold;
  border-radius: 0.25rem;
  animation: pulse 1s ease-in-out infinite;
  margin-left: var(--spacing-sm);
}

/* ============================================================
   ESTADOS DE CARGA Y ERROR
   ============================================================ */
.loading-state,
.error-state {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  min-height: 200px;
}

.loader {
  border: 4px solid #f3f3f3;
  border-top: 4px solid var(--color-primary);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
}

.loading-text {
  margin-top: var(--spacing-md);
  font-size: 1.25rem;
  color: var(--color-text);
}


/* ============================================================
   PANTALLA DE FINALIZACIÓN
   ============================================================ */
.finish-container {
  padding: 1rem 0.5rem;
  text-align: center;
}

.finish-emoji {
  font-size: 1.5rem;
  margin: 0 0 0.5rem 0;
}

.finish-title {
  color: var(--color-secondary);
  font-size: 1rem;
  margin: 0 0 0.75rem 0;
  text-shadow: 0 0 10px var(--color-secondary);
  font-weight: 600;
}

.finish-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  max-width: 500px;
  margin: 0 auto 0.75rem auto;
  background: rgba(0, 0, 0, 0.3);
  padding: 0.5rem;
  border-radius: 0.5rem;
}

.finish-stat {
  padding: 0.4rem;
  border-radius: 0.25rem;
  text-align: center;
}

.finish-stat-label {
  font-size: 0.6rem;
  color: #9ca3af;
  margin: 0 0 0.2rem 0;
  text-transform: uppercase;
}

.finish-stat-value {
  font-size: 1.2rem;
  font-weight: bold;
  font-family: 'Courier New', monospace;
  margin: 0;
}

.finish-stat.wpm {
  background: rgba(74, 222, 128, 0.1);
  border-left: 3px solid var(--color-success);
}

.finish-stat.wpm .finish-stat-value {
  color: var(--color-success);
}

.finish-stat.cpm {
  background: rgba(168, 85, 247, 0.1);
  border-left: 3px solid var(--color-info);
}

.finish-stat.cpm .finish-stat-value {
  color: var(--color-info);
}

.finish-stat.errors {
  background: rgba(248, 113, 113, 0.1);
  border-left: 3px solid var(--color-error);
}

.finish-stat.errors .finish-stat-value {
  color: var(--color-error);
}

.finish-stat.accuracy {
  background: rgba(250, 204, 21, 0.1);
  border-left: 3px solid var(--color-time);
}

.finish-stat.accuracy .finish-stat-value {
  color: var(--color-time);
}

.finish-time {
  color: #9ca3af;
  font-size: 0.75rem;
  margin: 0 0 0.5rem 0;
}

.finish-continue {
  color: var(--color-secondary);
  font-size: 0.8rem;
  margin: 0;
  animation: pulse 2s ease-in-out infinite;
}

@media (max-width: 768px) {
  .finish-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .finish-stat-value {
    font-size: 1rem;
  }
}

/* ============================================================
   UTILIDADES
   ============================================================ */
.hidden {
  display: none !important;
  opacity: 0 !important;
}

/* ============================================================
   ANIMACIONES
   ============================================================ */
@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.6;
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

@keyframes shake {

  0%,
  100% {
    transform: translateX(0);
  }

  25% {
    transform: translateX(-5px);
    background-color: rgba(248, 113, 113, 0.5);
  }

  75% {
    transform: translateX(5px);
    background-color: rgba(248, 113, 113, 0.5);
  }
}

.shake-error {
  animation: shake 0.2s ease-in-out;
  border-bottom: 2px solid var(--color-error) !important;
}