/* ==========================================================================
   Landing Page - Si llegas un poco tarde a la IA, este es tu gran atajo
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&family=Playfair+Display:ital,wght@0,700;1,600&display=swap');

:root {
  --brand-accent: #60a5fa;
  --bg-dark: #0f1218;
  --bg-card: rgba(25, 30, 40, 0.7);
  --text-primary: #f5f5f7;
  --text-secondary: #a1a1aa;
  --glass-border: rgba(255, 255, 255, 0.08);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Fondo dinámico sutil */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at 15% 15%, rgba(96, 165, 250, 0.08) 0%, transparent 40%),
              radial-gradient(circle at 85% 85%, rgba(60, 60, 70, 0.2) 0%, transparent 40%);
  z-index: -1;
}

/* ------------------ LAYOUT ------------------ */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.hero-section {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

/* ------------------ TIPOGRAFÍA ------------------ */
h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  line-height: 1.1;
  font-weight: 700;
  margin-bottom: 1rem;
}

h1 .highlight {
  color: var(--brand-accent);
}

.subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  font-weight: 300;
}

.copy-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  font-size: 1.1rem;
  color: #d1d5db;
}

.copy-section p {
  animation: fadeUp 0.8s ease-out forwards;
  opacity: 0;
  transform: translateY(15px);
}

/* Staggered animation */
.copy-section p:nth-child(1) { animation-delay: 0.1s; }
.copy-section p:nth-child(2) { animation-delay: 0.2s; }
.copy-section p:nth-child(3) { animation-delay: 0.3s; }
.copy-section p:nth-child(4) { animation-delay: 0.4s; }
.copy-section p:nth-child(5) { animation-delay: 0.5s; }

.dialogue {
  font-style: italic;
  color: #fff;
  border-left: 3px solid var(--brand-accent);
  padding-left: 1rem;
  margin: 1rem 0;
}

/* ------------------ CARD / GLASSMORPHISM ------------------ */
.book-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 2.5rem;
  margin: 2rem 0;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.book-card:hover {
  transform: translateY(-5px);
  border-color: rgba(211, 47, 47, 0.4);
}

.book-card h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: #fff;
}

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

.feature-list li {
  position: relative;
  padding-left: 1.5rem;
}

.feature-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--brand-accent);
  font-weight: bold;
}

/* ------------------ CTA ------------------ */
.cta-container {
  text-align: center;
  margin-top: 2rem;
}

.btn {
  display: inline-block;
  background: linear-gradient(135deg, #10B981, #059669);
  color: white;
  font-size: 1.2rem;
  font-weight: 600;
  text-decoration: none;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  box-shadow: 0 10px 20px rgba(16, 185, 129, 0.4);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.2) 50%, rgba(255,255,255,0) 100%);
  transform: skewX(-25deg);
  transition: all 0.7s ease;
}

.btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 15px 25px rgba(16, 185, 129, 0.5);
}

.btn:hover::after {
  left: 200%;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #2563eb;
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  border: none;
  transition: all 0.3s ease;
  margin-top: 1rem;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.btn-secondary:hover {
  background: #1d4ed8;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.price-note {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 1rem;
}

.price-note strong {
  color: #fff;
}

/* ------------------ INFO BOX ------------------ */
.info-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  max-width: 450px;
  margin: 1.5rem auto 0;
  text-align: left;
}

.info-box h4 {
  font-size: 0.85rem;
  color: #10B981;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-item {
  font-size: 0.85rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.75rem;
}

.info-item:nth-of-type(1)::before {
  content: "1.";
  position: absolute;
  left: 0;
  color: #fff;
  font-weight: 600;
}

.info-item:nth-of-type(2)::before {
  content: "2.";
  position: absolute;
  left: 0;
  color: #fff;
  font-weight: 600;
}

.info-item:nth-of-type(3)::before {
  content: "3.";
  position: absolute;
  left: 0;
  color: #fff;
  font-weight: 600;
}

.info-item:last-child {
  margin-bottom: 0;
}

.info-box hr {
  border: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  width: 70%;
  margin: 0.75rem 0;
}

/* ------------------ COVER IMAGE ------------------ */
.book-cover-wrapper {
  width: 100%;
  max-width: 500px; /* Aumentado sustancialmente */
  margin: 0 auto 1.5rem;
  transform: perspective(1000px) rotateY(-2deg) rotateX(1deg);
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
  display: flex;
  justify-content: center;
}

.book-cover-wrapper:hover {
  transform: perspective(1000px) rotateY(2deg) rotateX(-2deg) scale(1.03);
}

.book-cover-wrapper img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 20px 30px rgba(0,0,0,0.5));
}

/* ------------------ ANIMATIONS ------------------ */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 600px) {
  .container {
    padding: 2.5rem 1rem;
  }
  h1 {
    font-size: 2.2rem;
  }
  .book-card {
    padding: 1.5rem;
  }
}