/* Variables de diseño */
:root {
    --bg-color: #0b0f19;
    --card-bg: #161f30;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --accent: #06b6d4; /* Cian Skrynix */
    --accent-hover: #0891b2;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-stack);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

/* Navbar / Header */
header {
    background-color: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

nav a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 1.5rem;
    font-size: 0.95rem;
    transition: color 0.2s;
}

nav a:hover {
    color: var(--accent);
}

/* Botones */
.btn-primary, .btn-secondary, .btn-outline {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent);
    color: #000;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-main) !important;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.btn-outline {
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-main);
}

.btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--accent);
}

/* Sección Hero */
.hero {
    padding: 160px 0 100px 0;
    text-align: center;
    background: radial-gradient(circle at top, rgba(6, 182, 212, 0.15) 0%, transparent 60%);
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
    max-width: 800px;
    margin: 0 auto 1.5rem auto;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 650px;
    margin: 0 auto 2.5rem auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.system-req {
    font-size: 0.85rem !important;
    color: rgba(255, 255, 255, 0.4) !important;
}

/* Características (Grid) */
.features {
    padding: 80px 0;
}

.features h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 2.5rem 1.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.03);
    transition: transform 0.2s, border-color 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(6, 182, 212, 0.3);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Footer */
footer {
    padding: 40px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.9rem;
}

footer p {
    margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 { font-size: 2.2rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .btn-primary, .btn-outline { width: 100%; max-width: 300px; }
    nav a { display: none; } /* Simplificación para móvil */
    nav a.btn-secondary { display: inline-block; margin: 0; }
}