/* --- VARIABLES DE DISEÑO --- */
:root {
    /* Paleta de Colores */
    --background-color: #002D62; /* Azul oscuro corporativo */
    --accent-color: #FF8C00;      /* Naranja Oscuro */
    --accent-hover-color: #FFA500;/* Naranja */
    --text-color: #FFFFFF;        /* Blanco */
    --light-bg: #FFFFFF;          /* Blanco para fondos claros */
    --text-dark: #011e3f;         /* Azul muy oscuro para texto */
    --glow-color: rgba(255, 140, 0, 0.5);

    /* Tipografía */
    --primary-font: 'Montserrat', sans-serif;
    --secondary-font: 'Barlow', sans-serif;
    --condensed-font: 'Barlow Condensed', sans-serif;

    /* Botones */
    --button-border-radius: 50px;
    --button-border-width: 2px;
    --button-padding: 15px 35px;
}

/* --- ESTILOS GENERALES --- */
body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: var(--primary-font);
}

html {
    scroll-behavior: smooth;
}

/* --- TIPOGRAFÍA --- */
.h1 {
    font-family: var(--condensed-font);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 0.005em;
    color: var(--accent-color);
}
.h2 {
    font-family: var(--condensed-font);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.1;
    text-transform: uppercase;
    letter-spacing: 0.01em;
}
.h3 {
    font-family: var(--secondary-font);
    font-weight: 900;
    font-size: 2rem;
    line-height: 1.125;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}
.h4 {
    font-family: var(--primary-font);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.5;
    color: var(--accent-color);
}
.h5 {
    font-family: var(--primary-font);
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.5;
    color: var(--accent-color);
}
.subheadline {
    font-family: var(--primary-font);
    font-size: 1.25rem;
    line-height: 1.6;
    font-weight: 300;
}
@media (max-width: 768px) {
    .h1 { font-size: 3rem; }
    .h2 { font-size: 2rem; }
}

/* --- SECCIONES --- */
.bg-light {
    background-color: var(--light-bg);
    color: var(--text-dark);
}
.bg-dark {
    background-color: var(--background-color);
    color: var(--text-color);
}
.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--accent-color);
    margin: 12px auto 0;
}

/* --- HEADER --- */
.site-header {
    background-color: rgba(0, 45, 98, 0.85); /* Azul oscuro con transparencia */
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.nav-link {
    font-family: var(--primary-font);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    color: var(--text-color);
    transition: color 0.3s;
    position: relative;
    padding-bottom: 4px;
}
.nav-link:hover {
    color: var(--accent-hover-color);
}
.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--accent-hover-color);
    transition: width 0.3s ease-in-out;
}
.nav-link:hover::after {
    width: 100%;
}


/* --- HERO SECTION --- */
.hero-section {
    background-color: var(--background-color);
}

/* --- BOTONES --- */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--button-padding);
    border-radius: var(--button-border-radius);
    font-family: var(--primary-font);
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    border-width: var(--button-border-width);
    border-style: solid;
    transition: all 0.3s ease;
    cursor: pointer;
}
.button--primary {
    background-color: var(--accent-color);
    color: var(--text-dark);
    border-color: var(--accent-color);
}
.button--primary:hover {
    background-color: var(--accent-hover-color);
    border-color: var(--accent-hover-color);
    box-shadow: 0 0 20px 0px var(--glow-color);
    transform: translateY(-2px);
}
.button--secondary {
    background-color: transparent;
    color: var(--text-color);
    border-color: var(--text-color);
}
.button--secondary:hover {
    background-color: var(--text-color);
    color: var(--background-color);
}

/* --- TARJETAS DE SERVICIO CON EFECTO DE VOLTEO --- */
.flip-card {
    background-color: transparent;
    width: 100%;
    text-align: center;
    /* SUGERENCIA: Usar min-height para mayor flexibilidad */
    min-height: 480px; 
    perspective: 1000px;
}
.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    border-radius: 10px;
}
.flip-card:hover .flip-card-inner {
    transform: rotateY(180deg);
}
.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
}
.flip-card-back {
    transform: rotateY(180deg);
    align-items: center;
    justify-content: center;
}
.service-card {
    background-color: var(--light-bg);
    color: var(--text-dark);
    padding: 1.5rem;
    text-align: left;
    height: 100%; /* Asegura que la tarjeta ocupe todo el espacio */
}
.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 5px;
}

/* --- FOOTER --- */
.site-footer {
    background-color: var(--background-color);
}