:root {
    --primario: #3D4A1B;
    --secundario: #6E7B4A;
    --acento: #C9A24A;
    --oscuro: #171A14;
    --claro: #F6F1E6;
    --blanco: #FFFFFF;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--claro);
    color: var(--oscuro);
    line-height: 1.6;
}

.contenedor {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 20px 0;
    background-color: transparent;
}

header.scroll-activo {
    background-color: var(--primario);
    padding: 10px 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.contenedor-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo img {
    height: 60px;
    width: auto;
    display: block;
    transition: height 0.3s ease;
}

header.scroll-activo .logo img {
    height: 50px;
}

.menu {
    display: flex;
    list-style: none;
}

.menu li {
    margin: 0 15px;
}

.menu a {
    text-decoration: none;
    color: var(--blanco);
    text-transform: uppercase;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    position: relative;
    padding-bottom: 5px;
}

.menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--acento);
    transition: width 0.3s ease;
}

.menu a:hover::after, .menu a.active::after {
    width: 100%;
}

.menu a:hover, .menu a.active {
    color: var(--acento);
}

.btn-sistema {
    background-color: var(--acento);
    color: var(--oscuro);
    padding: 12px 25px;
    text-decoration: none;
    font-weight: bold;
    border-radius: 4px;
    text-transform: uppercase;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.btn-sistema:hover {
    background-color: var(--blanco);
    transform: scale(1.05);
}

.banner-hero {
    height: 100vh;
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('../img/hero-bg.jpg') no-repeat center center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--blanco);
}

.hero-texto h1 {
    font-size: 4rem;
    letter-spacing: 5px;
    margin-bottom: 10px;
    color: var(--acento);
    animation: fadeInDown 1s ease;
}

.hero-texto p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    text-transform: uppercase;
    animation: fadeInUp 1s ease 0.2s both;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.btn-scroll {
    border: 2px solid var(--blanco);
    color: var(--blanco);
    padding: 10px 30px;
    text-decoration: none;
    text-transform: uppercase;
    transition: all 0.3s;
    display: inline-block;
}

.btn-scroll:hover {
    background-color: var(--blanco);
    color: var(--oscuro);
}

.seccion-info, .seccion-funcionalidades, .seccion-contacto {
    padding: 120px 0;
    text-align: center;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 60px;
    position: relative;
    text-transform: uppercase;
    color: var(--primario);
}

h2::after {
    content: '';
    width: 80px;
    height: 4px;
    background-color: var(--acento);
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
}

.grid-funcionalidades {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.item-funcionalidad {
    background-color: var(--blanco);
    padding: 50px 30px;
    border-bottom: 5px solid var(--secundario);
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: transform 0.3s ease;
}

.item-funcionalidad:hover {
    transform: translateY(-10px);
}

.formulario-contacto {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

.formulario-contacto input, .formulario-contacto textarea {
    width: 100%;
    padding: 18px;
    margin-bottom: 25px;
    border: 1px solid #ddd;
    background-color: var(--blanco);
    border-radius: 4px;
    outline: none;
    transition: border-color 0.3s;
}

.formulario-contacto input:focus, .formulario-contacto textarea:focus {
    border-color: var(--acento);
}

.formulario-contacto button {
    background-color: var(--primario);
    color: var(--blanco);
    padding: 18px;
    border: none;
    text-transform: uppercase;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 4px;
}

.formulario-contacto button:hover {
    background-color: var(--oscuro);
    letter-spacing: 1px;
}

.pie-pagina {
    background-color: var(--oscuro);
    color: var(--blanco);
    padding: 50px 0;
    text-align: center;
    border-top: 3px solid var(--acento);
}

@media (max-width: 992px) {
    .menu {
        display: none;
    }
    
    .hero-texto h1 {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    .contenedor-nav {
        flex-direction: column;
        gap: 25px;
    }
    
    .logo img {
        height: 55px;
    }

    .seccion-info, .seccion-funcionalidades, .seccion-contacto {
        padding: 80px 0;
    }
}