:root {
    /* Paleta de colores Dark Minimalist */
    --bg-color: #050505;
    --surface-color: #121212;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --accent-color: #3b82f6;
    /* Azul técnico */
    --accent-hover: #2563eb;
    --border-color: #27272a;
    --spacing-unit: 1.5rem;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    padding-top: 80px;
    /* Compensate for fixed header */
}

.gracias {
    align-items: center;
    padding: 1em;
}

/* --- ANIMACIONES --- */

@keyframes shine {
    0% {
        background-position: 200% center;
    }

    100% {
        background-position: -200% center;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Tipografía */
h1,
h2,
h3,
h4 {
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    margin-bottom: 1.5rem;

    background: linear-gradient(110deg,
            #ffffff 0%,
            #ffffff 40%,
            #8c92a0 50%,
            #ffffff 60%,
            #ffffff 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    color: #fff;

    opacity: 0;
    animation:
        fadeInUp 0.8s ease-out 0.1s forwards,
        shine 3s linear infinite;
}

h2 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

/* Utilidades de Layout */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-padding {
    padding: 5rem 0;
}

.animate-enter {
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.3s;
}

.delay-3 {
    animation-delay: 0.5s;
}

/* Botones */
.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 1rem;
    cursor: pointer;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-color);
    border: 1px solid var(--text-primary);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--text-primary);
}

/* --- HEADER DINÁMICO --- */
header {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    /* Changed from sticky to fixed */
    width: 100%;
    top: 0;
    z-index: 100;

    /* Estado Original (Scroll Arriba) */
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(10px);

    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Estado "Scroll Abajo" (Minimalista) */
header.scrolled-down {
    background: transparent;
    /* Sin fondo */
    backdrop-filter: none;
    /* Sin blur */
    border-bottom-color: transparent;
    /* Sin borde */
    padding: 1rem 0;
    /* Un poco más compacto */
}

nav {
    position: relative;
    /* Necesario para posicionado absoluto de hijos */
    display: flex;
    justify-content: space-between;
    /* Fallback */
    align-items: center;
    height: 40px;
    /* Altura fija para evitar saltos */
}

/* Logo con transición de posición */
.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.03em;
    color: white;
    text-decoration: none;

    position: absolute;
    left: 0;
    transform: translateX(0);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo span {
    color: var(--accent-color);
}

/* Contenedor del botón del header */
.nav-btn-wrapper {
    position: absolute;
    right: 0;
    opacity: 1;
    transform: translateY(0);
    transition: all 0.4s ease;
}

/* Transformaciones cuando .scrolled-down está activo */

/* 1. Logo se va al centro */
header.scrolled-down .logo {
    left: 50%;
    transform: translateX(-50%);
}

/* 2. Botón desaparece */
header.scrolled-down .nav-btn-wrapper {
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
}


/* Hero Section */
.hero {
    padding: 8rem 0 6rem;
    max-width: 800px;
}

.hero-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
    border-radius: 99px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* Grid de Servicios */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card:hover {
    border-color: var(--text-secondary);
    transform: translateY(-5px);
}

.card-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.service-type {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-color);
    font-weight: 700;
    display: block;
    margin-bottom: 0.5rem;
}

.feature-list {
    list-style: none;
    margin: 1.5rem 0;
    flex-grow: 1;
}

.feature-list li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

.price-tag {
    margin-top: auto;
    padding-top: 1.5rem;
}

.price-amount {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.price-detail {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: block;
}

/* Sección Diferenciadora (No CMS) */
.value-prop {
    background: #0f0f0f;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 4rem 2rem;
    text-align: center;
    margin: 4rem 0;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    text-align: left;
}

.value-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.value-item p {
    font-size: 0.9rem;
}

/* Sección contenedora */
.contact-section {
  padding: 40px 20px;
  max-width: 600px; /* Para que no se estire demasiado en PC */
  margin: 0 auto;
  text-align: center;
}

.contact-section h2 {
  color: #ffffff;
  margin-bottom: 30px;
  font-size: 2rem;
}

/* El Formulario */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px; /* Espacio entre campos */
  text-align: left;
}

/* Etiquetas */
.contact-form label {
  display: block;
  color: #cccccc; /* Gris claro para no cansar la vista */
  margin-bottom: 8px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* Inputs y Textarea */
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 16px;
  background-color: #1a1a1a; /* Un poco más claro que el fondo negro total */
  border: 1px solid #333333;
  border-radius: 8px; /* Bordes redondeados modernos */
  color: #ffffff;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

/* Efecto al hacer clic en el input (Focus) */
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: #3b82f6; /* El AZUL de tu marca (ajústalo si es otro tono) */
  background-color: #222222;
}

/* El Botón (Estilo igual a tu botón "Ver Opciones") */
.btn-submit {
  background-color: #ffffff;
  color: #000000;
  padding: 14px 24px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 10px;
  transition: transform 0.2s ease, opacity 0.2s ease;
  width: 100%; /* Botón ancho en móvil es mejor */
}

.btn-submit:hover {
  opacity: 0.9;
  transform: translateY(-2px); /* Pequeña elevación visual */
}

/* Ajuste móvil para que no se rompa */
@media (min-width: 768px) {
  .btn-submit {
    width: auto; /* En PC el botón puede ser más pequeño */
    align-self: flex-start;
  }
}

/* Mobile Nav Toggle */
@media (max-width: 600px) {
    h1 {
        font-size: 2.5rem;
    }

    .hero {
        padding: 4rem 0;
    }
}