/**
 * Bitcoin Calculadora - Estilos globales
 * https://bitcoincalculadora.com
 */

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

:root {
  --bg: #1e1e1e;
  --surface: #141414;
  --surface-hover: #1e1e1e;
  --border: #838080;
  --text: #fafafa;
  --text-secondary: #b9b4b4;
  --accent: #f7931a;
  --accent-dim: rgba(247, 147, 26, 0.15);
  --green: #22c55e;
  --green-dim: rgba(34, 197, 94, 0.1);
  --red: #ef4444;
  --blue-twitter: #1d9bf0;
}

html {
  font-size: 16px;
}

body {
  font-family: 'Instrument Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
  max-width: 480px;
  margin: 0 auto;
  padding: 80px 24px;
}

/* Header */
header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.btc-logo {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.header-text h1 {
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 2px;
}

.header-text h1 a {
  color: inherit;
  text-decoration: none;
}

.header-text h1 a:hover {
  color: var(--accent);
}

.subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Hero Text */
.hero-text {
  margin-bottom: 48px;
}

.hero-text h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: 8px;
}

.hero-text h2 .accent {
  color: var(--accent);
}

.hero-text p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* Input Groups */
.input-group {
  margin-bottom: 48px;
}

.input-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  display: block;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.2s ease;
}

.input-wrapper:focus-within {
  border-color: #404040;
}

.currency {
  padding-left: 20px;
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-secondary);
  pointer-events: none;
}

input[type="number"] {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: 'Geist Mono', monospace;
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text);
  padding: 20px 20px 20px 8px;
  width: 100%;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"] {
  -moz-appearance: textfield;
}

/* Results */
.results {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 48px;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: var(--surface);
}

.result-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.result-value {
  font-family: 'Geist Mono', monospace;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  transition: opacity 0.15s ease;
}

.result-value.highlight {
  color: var(--accent);
}

/* Projection Section */
.projection {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 32px;
}

.projection-header {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.projection-controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 24px;
}

.control {
  flex: 1;
}

.control-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.control-value {
  font-family: 'Geist Mono', monospace;
  color: var(--text);
}

/* Range Inputs */
input[type="range"] {
  width: 100%;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 2px;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: var(--accent);
  border: none;
  border-radius: 50%;
  cursor: pointer;
}

/* Projection Results */
.projection-result {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.projection-invested {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.projection-invested span {
  color: var(--text);
  font-family: 'Geist Mono', monospace;
}

.projection-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.projection-amount {
  font-family: 'Geist Mono', monospace;
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--accent);
}

.projection-btc {
  font-family: 'Geist Mono', monospace;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.projection-sats {
  font-family: 'Geist Mono', monospace;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.projection-gain {
  display: inline-block;
  font-family: 'Geist Mono', monospace;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--green);
  background: var(--green-dim);
  padding: 6px 12px;
  border-radius: 6px;
}

.projection-note {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  line-height: 1.6;
}

/* Share Button */
.share-section {
  margin-bottom: 48px;
}

.share-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 20px;
  background: var(--blue-twitter);
  border: none;
  border-radius: 10px;
  color: white;
  font-family: 'Instrument Sans', sans-serif;
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.share-btn:hover {
  background: #1a8cd8;
  transform: translateY(-1px);
}

.share-btn svg {
  width: 18px;
  height: 18px;
}

/* CTA Section */
.cta-section {
  border-top: 1px solid var(--border);
  padding-top: 32px;
}

.cta-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* ✅ 3 columnas, filas automáticas, spacing consistente */
/* CTA Section */
.cta-section {
  border-top: 1px solid var(--border);
  padding-top: 32px;
}

.cta-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  }

.cta-row {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
  }

.cta-row:last-child {
  margin-bottom: 0;
}

.cta-link {
  flex: 1 1 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
  transition: all 0.15s ease;
}

.cta-link:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.cta-link svg {
  width: 16px;
  height: 16px;
  opacity: 0.7;
}

@media (max-width: 480px) {
  .cta-row {
    flex-direction: column;
  }
  
  .cta-link {
    max-width: 100%;
  }
}

/* Price Info */
.price-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.price-live {
  display: flex;
  align-items: center;
  gap: 6px;
}

.price-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.price-dot.error {
  background: var(--red);
  animation: none;
}

.price-dot.loading {
  background: var(--text-secondary);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.api-source {
  font-size: 0.6875rem;
  color: var(--text-secondary);
  opacity: 0.7;
}

/* FAQ Section */
.faq-section {
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid var(--border);
}

.faq-section h2 {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 24px;
}

.faq-item {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h3 {
  font-size: 0.9375rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text);
}

.faq-item p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Footer */
footer {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  text-align: center;
}

footer p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Navigation for multiple calculadoras */
.nav-calculadoras {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.nav-link {
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.8125rem;
  transition: all 0.15s ease;
}

.nav-link:hover,
.nav-link.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

/* Blog Styles */
.blog-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.blog-card {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all 0.15s ease;
}

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

.blog-card h3 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.blog-card h3 a {
  color: var(--text);
  text-decoration: none;
}

.blog-card h3 a:hover {
  color: var(--accent);
}

.blog-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.blog-card {
  position: relative;
}

.blog-card h3 a::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.blog-card:hover {
  border-color: var(--accent);
  cursor: pointer;
}

/* Article Styles */
.article-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin: 40px 0 16px;
}

.article-content h3 {
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--text);
  margin: 32px 0 12px;
}

.article-content p {
  margin-bottom: 16px;
}

.article-content ul,
.article-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content a {
  color: var(--accent);
  text-decoration: none;
}

.article-content a:hover {
  text-decoration: underline;
}

.article-content strong {
  color: var(--text);
}

.article-meta {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 480px) {
  .container {
    padding: 48px 20px;
  }

  .cta-links {
    flex-direction: column;
  }
  
  .projection-amount {
    font-size: 1.75rem;
  }

  .hero-text h2 {
    font-size: 1.25rem;
  }

  .nav-calculadoras {
    flex-direction: column;
  }

  .nav-link {
    text-align: center;
  }
}