/* ========================================
   GranMaster - Landing Page Styles
   Tema oscuro | Mobile First | Sin frameworks
   ======================================== */

/* ===== VARIABLES LOCALES (no modificar globales) ===== */
:root {
  /* Colores del tema */
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --border-color: #2a2a2a;
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-muted: #6b6b6b;
  
  /* Acentos */
  --accent-primary: #2563eb;    /* Azul eléctrico */
  --accent-primary-hover: #1d4ed8;
  --accent-secondary: #f59e0b;  /* Dorado */
  --accent-secondary-hover: #d97706;

  /* Efectos */
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --blur-effect: blur(12px) saturate(180%);
  /* Transiciones */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  /* Espaciado */
  --container-padding: 1.5rem;
  --section-padding: 5rem 0;
  --border-radius: 12px;
  --border-radius-lg: 16px;
  
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }

/* ===== UTILIDADES ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}
.section-padding { padding: var(--section-padding); }
.text-center { text-align: center; }
.flex { display: flex; }
.flex-center { align-items: center; justify-content: center; }
.flex-between { align-items: center; justify-content: space-between; }
.grid { display: grid; gap: 1.5rem; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ===== BOTONES ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 1rem;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent-primary);
  color: white;
}
.btn-primary:hover {
  background: var(--accent-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}
.btn-outline {
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  background: transparent;
}
.btn-outline:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}
.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: background var(--transition-normal), padding var(--transition-normal);
}
.header.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: var(--blur-effect);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}
.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
}
.logo i { color: var(--accent-secondary); }

.nav-desktop {
  display: none;
  gap: 1.5rem;
}
.nav-desktop a {
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 0.25rem 0;
}
.nav-desktop a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent-primary);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}
.nav-desktop a:hover { color: var(--text-primary); }
.nav-desktop a:hover::after { transform: scaleX(1); }

.auth-buttons {
  display: none;
  gap: 0.75rem;
}

.mobile-toggle {
  display: block;
  font-size: 1.5rem;
  color: var(--text-primary);
  padding: 0.5rem;
}

.nav-mobile {
  position: fixed;
  top: 70px; left: 0; right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem var(--container-padding);
  display: none;
  flex-direction: column;
  gap: 0.75rem;
  animation: slideDown 0.3s ease;
}
.nav-mobile.active { display: flex; }
.nav-mobile a {
  color: var(--text-secondary);
  padding: 0.5rem 0;
  font-weight: 500;
}
.nav-mobile a:hover { color: var(--accent-primary); }
.nav-mobile hr {
  border: 0;
  border-top: 1px solid var(--border-color);
  margin: 0.5rem 0;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem var(--container-padding) 4rem;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.hero-content {
  max-width: 800px;
  z-index: 2;
  animation: fadeInUp 0.8s ease;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #fff 0%, #b3b3b3 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: 1rem;
}
.hero-description {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-decoration {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}
.glow-effect {
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(37,99,235,0.15) 0%, transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  animation: pulse 8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== ESTADÍSTICAS ===== */
.stats { background: var(--bg-secondary); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.stat-card {
  text-align: center;
  padding: 1.5rem;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-fast);
}
.stat-card:hover { transform: translateY(-4px); }
.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-primary);
}
.stat-suffix {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent-primary);
}
.stat-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

/* ===== SERVICIOS ===== */
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.75rem;
}
.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 3rem;
}
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.service-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 1.75rem;
  transition: all var(--transition-normal);
}
.service-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.service-icon {
  width: 48px; height: 48px;
  background: rgba(37, 99, 235, 0.15);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem;
  color: var(--accent-primary);
  font-size: 1.25rem;
}
.service-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}
.service-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  line-height: 1.5;
}
.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.service-tags li {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  border: 1px solid var(--border-color);
}

/* ===== PLATAFORMA ===== */
.platform { background: var(--bg-secondary); }
.platform-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.platform-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: all var(--transition-normal);
}
.platform-card:hover {
  border-color: var(--accent-secondary);
  transform: translateY(-3px);
}
.platform-icon {
  width: 40px; height: 40px;
  background: rgba(245, 158, 11, 0.15);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-secondary);
  font-size: 1.1rem;
}
.platform-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
}
.platform-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  flex-grow: 1;
}
.badge-requires {
  display: inline-block;
  background: rgba(245, 158, 11, 0.2);
  color: var(--accent-secondary);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  width: fit-content;
}
.btn-access {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--accent-primary);
  font-weight: 500;
  font-size: 0.9rem;
  margin-top: 0.25rem;
}
.platform-card:hover .btn-access {
  gap: 0.5rem;
  transition: gap var(--transition-fast);
}

/* ===== CTA ===== */
.cta {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  text-align: center;
}
.cta-content h2 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  margin-bottom: 1rem;
}
.cta-content p {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 2rem;
}
.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3rem var(--container-padding) 1.5rem;
}
.footer-grid {
  display: grid;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}
.footer-brand .logo {
  margin-bottom: 1rem;
  font-size: 1.3rem;
}
.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 300px;
}
.footer-links h4,
.footer-contact h4 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}
.footer-links ul,
.footer-contact ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer-links a,
.footer-contact li {
  color: var(--text-secondary);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.footer-links a:hover { color: var(--accent-primary); }
.footer-contact i { color: var(--text-muted); width: 16px; }

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}
.social-links a {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  border: 1px solid var(--border-color);
}
.social-links a:hover {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ===== ANIMACIONES SCROLL ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== BREAKPOINTS ===== */
@media (min-width: 768px) {
  :root { --container-padding: 2rem; }
  
  .nav-desktop { display: flex; }
  .auth-buttons { display: flex; }
  .mobile-toggle { display: none; }
  
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 2fr 1fr 1.5fr; }
  
  .form-row { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .platform-grid { grid-template-columns: repeat(3, 1fr); }
  
  .hero { padding: 8rem var(--container-padding) 6rem; }
  .hero-cta { gap: 1.5rem; }
}

/* ===== ACCESIBILIDAD ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* Focus visible para navegación por teclado */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
  border-radius: 4px;
}