:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --accent-gradient: linear-gradient(135deg, #833ab4, #fd1d1d, #fcb045);
  
  /* Gradiente Blanco Moderno */
  --bg-main: #f8fafc;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-instructions: rgba(241, 245, 249, 0.7);
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: rgba(226, 232, 240, 0.8);
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 0% 0%, rgba(219, 234, 254, 0.7) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(237, 233, 254, 0.7) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(254, 243, 199, 0.3) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 1.5rem;
}

.container {
  background: var(--bg-card);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 24px;
  padding: 2.5rem 2rem;
  max-width: 480px;
  width: 100%;
  box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.08), 0 0 1px 1px rgba(0, 0, 0, 0.03);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.container::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--accent-gradient);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.15);
  color: #2563eb;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  margin-bottom: 1.2rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background-color: #16a34a;
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(22, 163, 74, 0.4);
}

h1 {
  font-size: 1.9rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
  color: #0f172a;
}

p.subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.tab-selector {
  display: flex;
  background: var(--bg-instructions);
  padding: 4px;
  border-radius: 12px;
  border: 1px solid var(--border);
  margin-bottom: 1.25rem;
  gap: 4px;
}

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.6rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
}

.tab-btn.active {
  background: #ffffff;
  color: #2563eb;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.hidden {
  display: none !important;
}

.instructions {
  background: var(--bg-instructions);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.25rem;
  margin-bottom: 2rem;
  text-align: left;
}

.step-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.step-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.88rem;
  color: #334155;
  line-height: 1.4;
}

.step-icon {
  background: #ffffff;
  color: #2563eb;
  min-width: 32px;
  height: 32px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(226, 232, 240, 0.8);
}

.highlight-text {
  color: #0f172a;
  font-weight: 600;
}

.actions-group {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 0.75rem;
}

.btn-action {
  font-size: 0.9rem;
  font-weight: 600;
  height: 48px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}

.btn-action.primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.btn-action.primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35);
}

.btn-action.secondary {
  background: #ffffff;
  color: #334155;
  border: 1px solid var(--border);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
}

.btn-action.secondary:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
  color: #0f172a;
  transform: translateY(-1px);
}

.btn-action.copied {
  background: #16a34a;
  box-shadow: 0 4px 14px rgba(22, 163, 74, 0.25);
}

.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #ffffff;
  padding: 0.8rem 1.4rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.3);
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.toast i {
  color: #4ade80;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

@media (max-width: 380px) {
  .actions-group {
    grid-template-columns: 1fr;
  }
}