/* ==========================================================================
   layout.css — cabecera, navegación, secciones, portada y pie
   ========================================================================== */

/* --- Cabecera --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--white);
    border-bottom: 1px solid var(--line);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 74px;
}

.brand img { height: 42px; width: auto; }

.nav { display: flex; align-items: center; gap: 30px; }

.nav__link {
    position: relative;
    font-family: var(--font-mono);
    font-size: 0.76rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--steel-600);
    white-space: nowrap;
    padding: 6px 0;
}

.nav__link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width var(--transition);
}

.nav__link:hover { color: var(--brand); }
.nav__link:hover::after { width: 100%; }

.nav__link[aria-current="page"] {
    color: var(--brand);
    font-weight: 600;
}

.nav__link[aria-current="page"]::after { width: 100%; }

/* Acceso al libro de reclamaciones, destacado como acción */
.nav__link--claims {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 8px 14px;
    color: var(--brand);
}

.nav__link--claims::after { display: none; }

.nav__link--claims:hover {
    background-color: var(--brand);
    border-color: var(--brand);
    color: var(--white);
}

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--ink);
    transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Secciones --- */
.section { padding: clamp(60px, 8vw, 110px) 0; }
.section--tint { background-color: var(--steel-50); border-block: 1px solid var(--line); }

.section__head { max-width: 760px; margin-bottom: 52px; }
.section__head--center { margin-inline: auto; text-align: center; }
.section__head--center .eyebrow { justify-content: center; }
.section__head h2 { margin-top: 16px; }

.section__lead {
    margin-top: 18px;
    font-size: 1.05rem;
    color: var(--steel-600);
}

/* --- Portada (hero) --- */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 600px;
    padding: clamp(70px, 10vw, 130px) 0;
    background: var(--brand-dark) url('../images/trabajos/torneado-tuberia.jpg') center/cover no-repeat;
    color: var(--white);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, rgba(4, 14, 34, 0.90) 0%, rgba(0, 26, 77, 0.76) 52%, rgba(0, 37, 150, 0.50) 100%);
}

/* Retícula tipo plano técnico */
.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: linear-gradient(120deg, #000 10%, transparent 78%);
}

.hero__inner { position: relative; z-index: 2; max-width: 820px; }

.hero h1 { color: var(--white); margin: 20px 0 8px; }

.hero__tagline {
    font-family: var(--font-mono);
    font-size: clamp(0.8rem, 1.6vw, 0.95rem);
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--accent);
}

.hero__text {
    margin: 24px 0 40px;
    max-width: 620px;
    font-size: 1.08rem;
    color: rgba(255, 255, 255, 0.82);
}

.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* --- Cabecera interior de página --- */
.page-head {
    position: relative;
    padding: clamp(50px, 7vw, 86px) 0;
    background-color: var(--brand-dark);
    color: var(--white);
    overflow: hidden;
}

.page-head::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: linear-gradient(115deg, #000 5%, transparent 70%);
}

.page-head__inner { position: relative; z-index: 2; max-width: 800px; }
.page-head h1 { color: var(--white); margin: 16px 0 0; }

.page-head__text {
    margin-top: 18px;
    max-width: 640px;
    color: rgba(255, 255, 255, 0.8);
}

/* Migas de pan */
.breadcrumb {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 4px;
}

.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { margin-inline: 8px; }

/* --- Pie de página --- */
.site-footer {
    background-color: var(--ink);
    color: rgba(255, 255, 255, 0.72);
    padding: 72px 0 0;
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1.4fr;
    gap: 48px;
    padding-bottom: 52px;
}

.site-footer h4 {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 20px;
}

.site-footer p { font-size: 0.94rem; }
.site-footer ul { list-style: none; }
.site-footer li { padding: 5px 0; font-size: 0.94rem; }
.site-footer a:hover { color: var(--white); }

.footer-brand img {
    height: 40px;
    width: auto;
    margin-bottom: 20px;
    background-color: var(--white);
    padding: 7px 10px;
    border-radius: var(--radius);
}

.site-footer__bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
    padding: 22px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: rgba(255, 255, 255, 0.5);
}

/* --- Adaptación a pantallas menores --- */
@media (max-width: 960px) {
    .nav-toggle { display: flex; }

    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 8px 0;
        background-color: var(--white);
        border-bottom: 1px solid var(--line);
        box-shadow: 0 18px 40px rgba(13, 27, 42, 0.12);
    }

    .nav.is-open { display: flex; }

    .nav__link { padding: 14px 24px; font-size: 0.8rem; }
    .nav__link::after { display: none; }
    .nav__link--claims { margin: 8px 24px; text-align: center; }

    .site-footer__grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 640px) {
    .site-footer__grid { grid-template-columns: 1fr; }
    .hero { min-height: 480px; }
    .hero__actions .btn { width: 100%; }
}