/* RESET & TYPOGRAPHY */
:root {
    --bg-color: #000000;
    --card-bg: #111111; /* Un negro un poco más claro para contraste sutil */
    --text-primary: #f5f5f7; /* Blanco "Apple" (no puro, descansa la vista) */
    --text-secondary: #86868b; /* Gris "Apple" */
    --accent: #2997ff; /* Azul característico de interfaces pro */
    --border-color: rgba(255,255,255,0.1);
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased; /* Suavizado de fuente premium */
}

/* NAVBAR FLOTANTE */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 8%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: saturate(180%) blur(20px); /* El famoso efecto cristal */
    border-bottom: 1px solid rgba(255,255,255,0.05);
    box-sizing: border-box;
}

.nav-links a {
    color: #cecece;
    text-decoration: none;
    margin-left: 35px;
    font-size: 13px;
    font-weight: 500;
    transition: color 0.3s ease;
}
.nav-links a:hover { color: #fff; }

.btn-nav {
    background: var(--accent);
    color: white !important;
    padding: 8px 18px;
    border-radius: 980px;
    font-weight: 600;
    font-size: 12px !important;
}

/* HERO SECTION */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 100px;
    background: radial-gradient(circle at 50% 20%, #1a1a2e 0%, #000000 60%);
}

.headline {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 15px;
    background: linear-gradient(180deg, #ffffff 0%, #a1a1aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sub-headline {
    font-size: 1.4rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 35px auto;
    font-weight: 400;
}

/* BOTONES */
.cta-container { display: flex; align-items: center; justify-content: center; gap: 20px; }

.btn-primary {
    background: var(--accent);
    color: white;
    padding: 14px 30px;
    border-radius: 980px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.btn-primary:hover {
    transform: scale(1.03);
    box-shadow: 0 0 25px rgba(41, 151, 255, 0.4);
}

.btn-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
}
.btn-link:hover { text-decoration: underline; }

/* SECCIONES Y TEXTOS */
section { padding: 120px 8%; }
.section-title {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 50px;
    letter-spacing: -0.01em;
}
.text-body {
    text-align: center;
    font-size: 1.5rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    font-weight: 500;
}

/* GRIDS Y CARDS */
.feature-grid, .benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-item, .benefit-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.feature-item:hover, .benefit-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    background: #151515;
}

.feature-item h3, .benefit-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    font-weight: 600;
    color: #fff;
}

.feature-item p { color: var(--text-secondary); font-size: 1.05rem; }
.benefit-card h3 { text-align: center; margin: 0; }

/* FOOTER */
footer {
    padding: 60px 8%;
    background: #050505;
    text-align: center;
    border-top: 1px solid var(--border-color);
}
.social-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 25px;
}
.social-links a { color: var(--text-secondary); font-size: 24px; transition: color 0.3s; }
.social-links a:hover { color: #fff; }
.copyright { color: #555; font-size: 12px; }

/* WHATSAPP FLOTANTE */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 30px;
    right: 30px;
    background-color: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    z-index: 1000;
    transition: transform 0.3s;
}
.whatsapp-float:hover { transform: scale(1.1); }
.whatsapp-icon-svg { width: 32px; height: 32px; fill: white; }

/* RESPONSIVE */
@media (max-width: 768px) {
    .headline { font-size: 3rem; }
    .navbar { flex-direction: column; padding: 15px; }
    .nav-links { margin-top: 15px; display: flex; gap: 20px; }
    .nav-links a { margin: 0; }
    .cta-container { flex-direction: column; }
}