/* Variables CSS y Sistema de Diseño */
:root {
    --bg-color: #0f172a;          /* Fondo oscuro elegante */
    --text-main: #f8fafc;         /* Texto principal claro */
    --text-muted: #94a3b8;        /* Texto secundario atenuado */
    --primary: #6366f1;           /* Color primario vibrante (Indigo) */
    --primary-hover: #4f46e5;
    --secondary-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --accent: #ec4899;            /* Acento rosado para degradados */
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    /* Efecto de fondo sutil (luces) */
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(236, 72, 153, 0.15) 0%, transparent 50%);
    background-attachment: fixed;
}

/* ================= Navbar ================= */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 5%;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    padding: 1rem 5%;
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.kyba-logo {
    display: flex;
    gap: 6px;
    align-items: center;
    transition: transform 0.3s ease;
}

.kyba-logo:hover {
    transform: scale(1.05);
}

.kyba-logo .logo-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: 2px solid var(--text-main);
    border-radius: 6px;
    background: transparent;
    color: var(--text-main);
    font-weight: 700;
    font-size: 16px;
    line-height: 1;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

.kyba-logo:hover .logo-box {
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.4);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary);
}

/* ================= Botones ================= */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

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

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

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

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

/* ================= Sección Hero ================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 7rem 5% 4rem;
    gap: 4rem;
}

.hero-content {
    flex: 1;
    max-width: 650px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 90%;
}

.cta-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.cta-group {
    display: flex;
    gap: 1rem;
}

.license-text {
    font-size: 0.85rem !important;
    color: var(--text-muted) !important;
    margin: 0 !important;
    opacity: 0.8;
}

/* ================= Tarjetas Glassmorphism ================= */
.glass-card {
    background: var(--secondary-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.hero-graphic {
    flex: 1;
    display: flex;
    justify-content: center;
    perspective: 1000px;
}

.main-card {
    width: 100%;
    max-width: 1020px;
    padding: 1.5rem;
    transform: rotateY(-10deg) rotateX(5deg);
    transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.main-card:hover {
    transform: rotateY(0deg) rotateX(0deg) scale(1.02);
}

.mockup-header {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.red { background: #ff5f56; }
.yellow { background: #ffbd2e; }
.green { background: #27c93f; }

.mockup-body h2 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.mockup-body p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.progress {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    animation: load 2.5s ease-out forwards;
}

/* ================= Sección Cómo Funciona ================= */
.how-it-works {
    padding: 6rem 5% 2rem;
}

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

.step-row {
    display: flex;
    align-items: center;
    gap: 4rem;
    margin-bottom: 4rem;
}

.step-image {
    flex: 1;
}

.step-image .glass-card:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.02) !important;
}

.step-text {
    flex: 1;
}

.step-text h3 {
    font-size: 2.2rem;
    color: var(--primary);
    margin-bottom: 1rem;
    font-weight: 800;
}

.step-text p {
    font-size: 1.15rem;
    color: var(--text-muted);
    line-height: 1.6;
    text-align: justify;
}

.fade-in-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 900px) {
    .step-row {
        flex-direction: column;
        text-align: center;
        gap: 2.5rem;
    }
}

/* ================= Sección Características ================= */
.features {
    padding: 8rem 5%;
}

.section-title {
    text-align: center;
    margin-bottom: 5rem;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
}

.section-title p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.feature-card {
    padding: 2.5rem;
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.3);
}

.icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.6;
    text-align: justify;
}

.requirements-list {
    text-align: left;
    color: var(--text-muted);
    line-height: 1.6;
    padding-left: 1.2rem;
    margin-top: 1rem;
}

.requirements-list li {
    margin-bottom: 0.75rem;
}

/* ================= Footer ================= */
footer {
    text-align: center;
    padding: 3rem 5%;
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ================= Animaciones ================= */
@keyframes load {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

.fade-in {
    opacity: 0;
    animation: fadeIn 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ================= Responsive ================= */
@media (max-width: 900px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 8rem;
    }
    
    .hero-content {
        max-width: 100%;
    }

    .hero p {
        margin: 0 auto 2.5rem auto;
    }
    
    .hero h1 { font-size: 3rem; }
    
    .cta-group {
        justify-content: center;
    }
    
    .nav-links {
        display: none; /* Idealmente aquí iría un menú hamburguesa */
    }
}