/**
 * ¿Cómo Pago en Venezuela?
 * Estilos Principales (Vanilla CSS Moderno)
 * https://como-pago.leandrus.net
 */

:root {
  /* Paleta de Colores Primarios & Fondos */
  --bg-main: #090d16;
  --bg-card: #131b2e;
  --bg-card-hover: #18223a;
  --bg-card-accent: rgba(30, 41, 59, 0.7);
  --bg-input: #0b1120;
  --bg-input-readonly: #172033;

  /* Bordes & Sombras */
  --border-subtle: #1e293b;
  --border-strong: #334155;
  --border-focus: #3b82f6;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  --shadow-glow-blue: 0 0 20px rgba(59, 130, 246, 0.25);
  --shadow-glow-green: 0 0 20px rgba(16, 185, 129, 0.2);
  --shadow-glow-yellow: 0 0 20px rgba(245, 158, 11, 0.2);

  /* Acentos de Marca y Estados */
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-primary-gradient: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  --color-secondary-gradient: linear-gradient(135deg, #475569 0%, #334155 100%);

  /* Tasas: Verde (BCV/Oficial) y Ámbar/Amarillo (Paralelo/USDT) */
  --color-bcv: #10b981;
  --color-bcv-bg: rgba(16, 185, 129, 0.1);
  --color-bcv-border: rgba(16, 185, 129, 0.3);
  
  --color-usdt: #f59e0b;
  --color-usdt-bg: rgba(245, 158, 11, 0.1);
  --color-usdt-border: rgba(245, 158, 11, 0.3);

  --color-danger: #ef4444;
  --color-warning: #f97316;
  --color-info: #38bdf8;

  /* Tipografía */
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* Radios y Espaciado */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* Reset y Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 1.25rem 1rem 3rem;
  background: radial-gradient(circle at 50% 0%, #152038 0%, var(--bg-main) 70%);
  background-attachment: fixed;
}

/* Eliminar flechas en inputs de número */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
}

/* Contenedor Principal */
.app-container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Encabezado */
.app-header {
  text-align: center;
  padding: 0.5rem 0 0.5rem;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.75rem;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: #60a5fa;
  margin-bottom: 0.6rem;
}

.brand-badge .status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-bcv);
  box-shadow: 0 0 8px var(--color-bcv);
  animation: pulse-live 2s infinite;
}

@keyframes pulse-live {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.app-title {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #ffffff 30%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.35rem;
}

.app-description {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.4;
  max-width: 380px;
  margin: 0 auto;
}

/* Tarjetas (Cards) */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.15rem;
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
}

.card:hover {
  border-color: var(--border-strong);
}

/* Grid de Tasas */
.rates-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.rate-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 0.85rem;
  border-radius: var(--radius-md);
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.rate-card.bcv {
  border-color: var(--color-bcv-border);
  background: linear-gradient(180deg, var(--color-bcv-bg) 0%, var(--bg-card) 60%);
}

.rate-card.usdt {
  border-color: var(--color-usdt-border);
  background: linear-gradient(180deg, var(--color-usdt-bg) 0%, var(--bg-card) 60%);
}

.rate-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.4rem;
}

.rate-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.rate-label.bcv { color: var(--color-bcv); }
.rate-label.usdt { color: var(--color-usdt); }

.edit-icon {
  width: 14px;
  height: 14px;
  color: var(--text-dim);
  opacity: 0.6;
}

.rate-value-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.currency-symbol {
  font-size: 1rem;
  font-weight: 700;
}

.currency-symbol.bcv { color: var(--color-bcv); }
.currency-symbol.usdt { color: var(--color-usdt); }

.rate-input {
  width: 100%;
  font-size: 1.25rem;
  font-weight: 800;
  border: 1px dashed transparent;
  background: transparent;
  padding: 0.15rem 0.25rem;
  border-radius: var(--radius-sm);
  outline: none;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.rate-input:hover {
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.03);
}

.rate-input:focus {
  border-color: var(--color-primary);
  border-style: solid;
  background: var(--bg-input);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.rate-input.bcv { color: var(--color-bcv); }
.rate-input.usdt { color: var(--color-usdt); }

/* Loader Spinner */
.rate-loader {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 12px;
  height: 12px;
  border: 2px solid var(--color-primary);
  border-top-color: transparent;
  border-radius: 50%;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.rate-loader.active {
  opacity: 1;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Diferencial de Tasas & Fecha de Actualización */
.rates-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.75rem;
  color: var(--text-dim);
  text-align: center;
}

.rates-diff {
  font-weight: 500;
}

.api-timestamp {
  font-size: 0.7rem;
  color: var(--text-dim);
}

.badge-diff {
  font-weight: 700;
}

.badge-diff.red { color: #f87171; }
.badge-diff.orange { color: #fb923c; }
.badge-diff.green { color: #4ade80; }

/* Sección Tasa Promedio */
.avg-rate-card {
  border-color: rgba(59, 130, 246, 0.35);
  box-shadow: var(--shadow-glow-blue);
  background: linear-gradient(180deg, rgba(30, 58, 138, 0.15) 0%, var(--bg-card) 80%);
}

.avg-rate-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
}

.avg-rate-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: #93c5fd;
}

.avg-rate-formula-hint {
  font-size: 0.68rem;
  color: var(--text-dim);
}

.input-with-icon {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix {
  position: absolute;
  left: 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 700;
  pointer-events: none;
}

.input-suffix {
  position: absolute;
  right: 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  pointer-events: none;
}

.input-suffix.green { color: var(--color-bcv); }
.input-suffix.yellow { color: var(--color-usdt); }

.input-control {
  width: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: inherit;
  font-size: 1.15rem;
  font-weight: 700;
  padding: 0.8rem 1rem;
  transition: all var(--transition-fast);
}

.input-control:focus {
  border-color: var(--border-focus);
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.input-control.center {
  text-align: center;
  padding-left: 2rem;
  padding-right: 2rem;
}

/* Ofertas Comparativas */
.offers-section {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.offer-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.offer-label {
  font-size: 0.75rem;
  font-weight: 700;
  margin-left: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.offer-label.bcv { color: var(--color-bcv); }
.offer-label.avg { color: var(--color-usdt); }

.offer-dual-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
}

.offer-dual-inputs .input-control {
  padding: 0.75rem 0.6rem;
  text-align: center;
  font-size: 1.05rem;
}

.offer-dual-inputs .input-usd-bcv {
  color: #34d399;
}

.offer-dual-inputs .input-usd-avg {
  color: #fcd34d;
}

.input-readonly {
  background-color: var(--bg-input-readonly) !important;
  border-color: var(--border-subtle) !important;
  color: var(--text-muted) !important;
  cursor: default !important;
}

.separator {
  border: none;
  height: 1px;
  background: var(--border-subtle);
  margin: 0.25rem 0;
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.95rem 1.25rem;
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  font-weight: 700;
  font-family: inherit;
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
  text-decoration: none;
  user-select: none;
}

.btn-primary {
  background: var(--color-primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(1px);
  opacity: 0.9;
}

.btn-secondary {
  background: var(--color-secondary-gradient);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: linear-gradient(135deg, #64748b 0%, #475569 100%);
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(1px);
}

.btn-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.buttons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

/* Sección 2: Resultados */
.results-card {
  text-align: center;
  padding: 1.5rem 1.25rem;
  border-top-width: 4px;
  border-top-style: solid;
  transition: all var(--transition-normal);
}

.results-card.border-default {
  border-top-color: var(--border-strong);
}

.results-card.border-bcv {
  border-top-color: var(--color-bcv);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.12) 0%, var(--bg-card) 60%);
  box-shadow: var(--shadow-glow-green);
}

.results-card.border-avg {
  border-top-color: #3b82f6;
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.12) 0%, var(--bg-card) 60%);
  box-shadow: var(--shadow-glow-blue);
}

.results-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.6rem;
}

.results-verdict {
  font-size: 1.45rem;
  font-weight: 800;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  display: inline-block;
  letter-spacing: -0.02em;
}

.results-verdict.bcv-won {
  color: var(--color-bcv);
  background: rgba(16, 185, 129, 0.15);
}

.results-verdict.avg-won {
  color: #60a5fa;
  background: rgba(59, 130, 246, 0.15);
}

.results-verdict.equal {
  color: #f1f5f9;
  background: rgba(148, 163, 184, 0.15);
}

.results-details {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.savings-highlight {
  font-size: 1.15rem;
  font-weight: 800;
  display: block;
  margin: 0.25rem 0;
}

.savings-highlight.bcv { color: #34d399; }
.savings-highlight.avg { color: #60a5fa; }

/* Tarjeta USDT Equivalente */
.usdt-transfer-card {
  border-top: 4px solid var(--color-usdt);
  background: linear-gradient(180deg, var(--color-usdt-bg) 0%, var(--bg-card) 70%);
  box-shadow: var(--shadow-glow-yellow);
}

.usdt-amount-box {
  font-size: 1.75rem;
  font-weight: 900;
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.12);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(245, 158, 11, 0.25);
  display: inline-block;
  margin: 0.5rem 0;
}

.usdt-explanation {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Pie de Página */
.app-footer {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem 0.85rem;
  font-size: 0.75rem;
}

.footer-link {
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: #93c5fd;
  text-decoration: underline;
}

.footer-btn-consent {
  background: transparent;
  border: none;
  font-size: 0.75rem;
  color: var(--text-dim);
  cursor: pointer;
  font-family: inherit;
  padding: 0;
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.footer-btn-consent:hover {
  color: #93c5fd;
}

.footer-meta {
  font-size: 0.7rem;
  color: var(--text-dim);
}

.footer-meta a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
}

.footer-meta a:hover {
  color: #ffffff;
}

.footer-api-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.68rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

.footer-api-badge a {
  color: #60a5fa;
  text-decoration: none;
  font-weight: 500;
}

.footer-api-badge a:hover {
  text-decoration: underline;
}

/* Clases de Utilidad */
.hidden {
  display: none !important;
}

/* Modales Genéricos Integrados */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(9, 13, 22, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 580px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-dialog {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  background: var(--bg-card);
  z-index: 10;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.modal-close-btn:hover {
  color: #ffffff;
  background: var(--bg-card-hover);
}

.modal-body {
  padding: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.modal-body h3 {
  color: #ffffff;
  font-size: 1rem;
  margin: 1.25rem 0 0.5rem;
}

.modal-body h3:first-child {
  margin-top: 0;
}

.modal-body p {
  margin-bottom: 0.75rem;
}

.modal-body ul {
  padding-left: 1.25rem;
  margin-bottom: 0.75rem;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  background: var(--bg-card);
  position: sticky;
  bottom: 0;
}

/* Responsividad Mejorada */
@media (min-width: 640px) {
  body {
    padding: 2.5rem 1rem 4rem;
  }

  .app-container {
    max-width: 520px;
  }

  .app-title {
    font-size: 2.2rem;
  }

  .app-description {
    font-size: 0.9rem;
    max-width: 440px;
  }

  .rate-input {
    font-size: 1.4rem;
  }
}

@media (min-width: 900px) {
  .app-container {
    max-width: 560px;
  }
}