/* ==========================================================================
   IPESTRUCTURALES — Página de inicio
   Sube este archivo a la carpeta /css/ del servidor (css/index.css)
   ========================================================================== */

/* -------------------- Variables de marca -------------------- */
:root {
    --color-primario: #0e4561;
    --color-primario-oscuro: #08324a;
    --color-acento: #00884f;
    --color-acento-oscuro: #006b3d;
    --color-texto: #232329;
    --color-texto-claro: #5a6472;
    --color-fondo-claro: #f4f6f8;
    --color-borde: #e2e6ea;
    --color-blanco: #ffffff;
    --radio: 6px;
    --sombra: 0 2px 10px rgba(14, 69, 97, 0.08);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Open Sans', Arial, sans-serif;
    color: var(--color-texto);
    line-height: 1.6;
    background-color: var(--color-blanco);
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; }

h1, h2, h3 { line-height: 1.25; color: var(--color-primario-oscuro); }

h1 { font-size: 2.25rem; font-weight: 700; }
h2 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.75rem; }
h3 { font-size: 1.15rem; font-weight: 600; }

p { color: var(--color-texto-claro); }

.contenedor {
    width: 92%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 3.5rem 0;
}

/* -------------------- Botones -------------------- */
.boton {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    padding: 0.85em 1.6em;
    border-radius: var(--radio);
    font-weight: 600;
    font-size: 1rem;
    transition: background-color 0.2s ease, transform 0.15s ease;
}

.boton-primario {
    background-color: var(--color-acento);
    color: var(--color-blanco);
}
.boton-primario:hover { background-color: var(--color-acento-oscuro); }

.boton-secundario {
    background-color: transparent;
    color: var(--color-primario);
    border: 2px solid var(--color-primario);
}
.boton-secundario:hover { background-color: var(--color-primario); color: var(--color-blanco); }

.boton-secundario-claro {
    background-color: transparent;
    color: var(--color-blanco);
    border: 2px solid rgba(255, 255, 255, 0.6);
}
.boton-secundario-claro:hover { background-color: rgba(255, 255, 255, 0.15); }

/* -------------------- Header -------------------- */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-blanco);
    box-shadow: var(--sombra);
}

#header {
    width: 92%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 0;
    gap: 1.5rem;
}

#logo img { height: 48px; width: auto; }

#contacto-rapido {
    display: flex;
    gap: 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primario);
    margin-left: auto;
}

#contacto-rapido a:hover { color: var(--color-acento); }

nav #menu {
    display: flex;
    gap: 1.75rem;
}

#menu li a {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-texto);
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
}

#menu li a:hover,
#menu li a.activo {
    color: var(--color-primario);
    border-bottom-color: var(--color-acento);
}

.mobile-menu-button {
    display: none;
    font-size: 1.4rem;
    color: var(--color-primario);
    cursor: pointer;
}

/* -------------------- Hero -------------------- */
#hero {
    display: flex;
    align-items: center;
    gap: 3rem;
    padding-top: 3rem;
}

#hero-texto { flex: 1 1 50%; }

#hero-texto p {
    font-size: 1.1rem;
    margin: 1.25rem 0 2rem;
    max-width: 46ch;
}

#hero-cta { display: flex; flex-wrap: wrap; gap: 1rem; }

#hero-imagen { flex: 1 1 50%; }

#hero-imagen img {
    border-radius: var(--radio);
    box-shadow: var(--sombra);
}

/* -------------------- Barra de confianza -------------------- */
#confianza {
    padding: 1.75rem 0;
    background-color: var(--color-fondo-claro);
    border-top: 1px solid var(--color-borde);
    border-bottom: 1px solid var(--color-borde);
}

#confianza ul {
    width: 92%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1rem;
}

#confianza li {
    display: flex;
    align-items: center;
    gap: 0.6em;
    font-weight: 600;
    color: var(--color-primario-oscuro);
    font-size: 0.95rem;
}

#confianza i { color: var(--color-acento); font-size: 1.1rem; }

/* -------------------- Secciones genéricas -------------------- */
.intro-seccion {
    max-width: 60ch;
    margin-bottom: 2rem;
    font-size: 1.05rem;
}

.ver-todos { margin-top: 1.5rem; }
.ver-todos a { font-weight: 600; color: var(--color-primario); }
.ver-todos a:hover { color: var(--color-acento); }

/* -------------------- Servicios -------------------- */
#grid-servicios {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.tarjeta-servicio {
    background-color: var(--color-blanco);
    border: 1px solid var(--color-borde);
    border-radius: var(--radio);
    padding: 1.75rem;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.tarjeta-servicio:hover { box-shadow: var(--sombra); transform: translateY(-2px); }

.tarjeta-servicio i {
    font-size: 1.6rem;
    color: var(--color-acento);
    margin-bottom: 0.75rem;
}

.tarjeta-servicio h3 { margin-bottom: 0.5rem; }
.tarjeta-servicio p { font-size: 0.95rem; }

#galeria-metalicas {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

#galeria-metalicas figure {
    border-radius: var(--radio);
    overflow: hidden;
    box-shadow: var(--sombra);
    aspect-ratio: 2 / 3;
}

#galeria-metalicas img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

#galeria-metalicas figure:hover img { transform: scale(1.05); }

/* -------------------- Diferenciadores -------------------- */
#diferenciadores { background-color: var(--color-fondo-claro); }

#grid-diferenciadores {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
}

.tarjeta-simple i {
    font-size: 1.5rem;
    color: var(--color-primario);
    margin-bottom: 0.5rem;
}

.tarjeta-simple h3 { margin-bottom: 0.35rem; }
.tarjeta-simple p { font-size: 0.95rem; }

/* -------------------- Credenciales -------------------- */
#credenciales-contenido {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

#foto-ingeniero {
    width: 220px;
    height: 220px;
    object-fit: cover;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: var(--sombra);
}

#credenciales-contenido p { font-size: 1.05rem; margin-bottom: 1rem; }

/* -------------------- Áreas de experiencia -------------------- */
#lista-areas {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

#lista-areas li {
    display: flex;
    align-items: center;
    gap: 0.6em;
    background-color: var(--color-fondo-claro);
    border-radius: var(--radio);
    padding: 0.9rem 1rem;
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--color-primario-oscuro);
}

#lista-areas i { color: var(--color-acento); }

/* -------------------- Metodología -------------------- */
#pasos {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.75rem;
}

#pasos li { position: relative; padding-top: 0.5rem; }

.numero {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    background-color: var(--color-primario);
    color: var(--color-blanco);
    font-weight: 700;
    margin-bottom: 0.75rem;
}

#pasos h3 { margin-bottom: 0.35rem; }
#pasos p { font-size: 0.92rem; }

/* -------------------- FAQ -------------------- */
.pregunta {
    border-bottom: 1px solid var(--color-borde);
    padding: 1.25rem 0;
}
.pregunta:first-of-type { border-top: 1px solid var(--color-borde); }
.pregunta h3 { margin-bottom: 0.4rem; }
.pregunta p { font-size: 0.97rem; }

/* -------------------- CTA final -------------------- */
#cta-final {
    background-color: var(--color-primario-oscuro);
    color: var(--color-blanco);
    text-align: center;
}

#cta-final h2 { color: var(--color-blanco); }

#cta-final p {
    color: rgba(255, 255, 255, 0.85);
    max-width: 55ch;
    margin: 0 auto 2rem;
}

#cta-final-botones {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

/* -------------------- Contacto (home) -------------------- */
#contacto-home-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem 2.5rem;
    font-weight: 600;
    color: var(--color-primario-oscuro);
}

#contacto-home-grid i { color: var(--color-acento); margin-right: 0.4em; }
#contacto-home-grid a:hover { color: var(--color-acento); }

/* -------------------- Footer -------------------- */
#footer {
    background-color: var(--color-primario-oscuro);
    color: rgba(255, 255, 255, 0.85);
}

#footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2.5rem;
    padding-top: 3rem;
    padding-bottom: 2rem;
}

#footer h2 {
    color: var(--color-blanco);
    font-size: 1.05rem;
    margin-bottom: 1rem;
}

#footer p, #footer li { font-size: 0.92rem; margin-bottom: 0.6rem; }
#footer a:hover { color: var(--color-blanco); }

#footer-redes {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    font-size: 1.4rem;
}
#footer-redes a:hover { color: var(--color-acento); }

#footer-copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    text-align: center;
    padding: 1.25rem 0;
    font-size: 0.85rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media screen and (max-width: 900px) {
    #grid-servicios { grid-template-columns: repeat(2, 1fr); }
    #galeria-metalicas { grid-template-columns: repeat(3, 1fr); }
    #grid-diferenciadores { grid-template-columns: 1fr; }
    #lista-areas { grid-template-columns: repeat(2, 1fr); }
    #pasos { grid-template-columns: repeat(2, 1fr); }
    #footer-grid { grid-template-columns: 1fr 1fr; }
}

@media screen and (max-width: 768px) {
    .mobile-menu-button { display: block; }

    nav #menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-blanco);
        box-shadow: var(--sombra);
        padding: 1rem 0;
    }

    nav #menu.menu-abierto { display: flex; }

    #menu li a { display: block; padding: 0.75rem 1.5rem; }

    #contacto-rapido { display: none; }

    #hero { flex-direction: column-reverse; padding-top: 1.5rem; }
    #hero-texto, #hero-imagen { flex-basis: auto; width: 100%; }
    h1 { font-size: 1.75rem; }

    #confianza ul { flex-direction: column; gap: 0.85rem; }

    #grid-servicios { grid-template-columns: 1fr; }
    #galeria-metalicas { grid-template-columns: repeat(3, 1fr); gap: 0.5rem; }
    #lista-areas { grid-template-columns: 1fr 1fr; }
    #pasos { grid-template-columns: 1fr; }

    #credenciales-contenido { flex-direction: column; text-align: center; }

    #footer-grid { grid-template-columns: 1fr; text-align: center; }
    #footer-redes { justify-content: center; }
}