/* ============================================
   VARIABLES — Ink / Steel / Cement / Concrete / Paper / Signal
   ============================================ */

:root {
    --ink: #16171A;
    --steel: #24262B;
    --cement: #6B6E76;
    --concrete: #F1F0EC;
    --paper: #FFFFFF;
    --signal: #E8720C;
    --signal-dark: #C15E09;
    --border: #E3E1DC;

    --font-display: 'Oswald', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    --radius: 6px;
    --shadow: 0 2px 10px rgba(22, 23, 26, 0.08);
    --shadow-hover: 0 14px 30px rgba(22, 23, 26, 0.16);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    color: var(--ink);
    background: var(--paper);
    line-height: 1.6;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }

h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.15;
    color: var(--ink);
}

h1 { font-size: 3.4rem; text-transform: uppercase; letter-spacing: 0.5px; }
h2 { font-size: 2.4rem; text-transform: uppercase; letter-spacing: 0.5px; }
h3 { font-size: 1.15rem; text-transform: uppercase; letter-spacing: 0.5px; }

p { color: var(--cement); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============================================
   SECTION LABEL — motivo de esquinas tipo plano técnico
   ============================================ */

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 3px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--signal);
    margin-bottom: 14px;
}

.section-label::before,
.section-label::after {
    content: '';
    width: 22px;
    height: 12px;
    border-top: 2px solid var(--signal);
    flex-shrink: 0;
}
.section-label::before { border-left: 2px solid var(--signal); }
.section-label::after { border-right: 2px solid var(--signal); }

.section-label-light { color: var(--signal); }
.section-label-light::before,
.section-label-light::after { border-color: var(--signal); }

.section-subtitle {
    font-size: 1.05rem;
    color: var(--cement);
    max-width: 560px;
    margin-bottom: 50px;
}

/* ============================================
   BOTONES
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 32px;
    border-radius: var(--radius);
    font-family: var(--font-display);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary { background: var(--signal); color: var(--paper); }
.btn-primary:hover { background: var(--signal-dark); transform: translateY(-2px); box-shadow: var(--shadow-hover); }

.btn-outline { border-color: rgba(255,255,255,0.5); color: var(--paper); }
.btn-outline:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

.btn-outline-light { border-color: rgba(255,255,255,0.4); color: var(--paper); }
.btn-outline-light:hover { background: var(--paper); color: var(--ink); }

.btn-whatsapp { background: #25D366; color: var(--paper); }
.btn-whatsapp:hover { background: #1fb85c; transform: translateY(-2px); }

/* ============================================
   NAVBAR
   ============================================ */

.navbar {
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 1.5rem; }
.logo-text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 1px;
    color: var(--ink);
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}
.logo-sub {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.65rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--signal);
}

.nav-menu { display: flex; gap: 2rem; }
.nav-link {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    position: relative;
    transition: var(--transition);
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px; left: 0;
    width: 0; height: 2px;
    background: var(--signal);
    transition: var(--transition);
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.btn-cta {
    background: var(--ink);
    color: var(--paper);
    padding: 11px 22px;
    border-radius: var(--radius);
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: var(--transition);
    white-space: nowrap;
}
.btn-cta:hover { background: var(--signal); }

.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.hamburger span { width: 24px; height: 2px; background: var(--ink); transition: var(--transition); }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================
   HERO
   ============================================ */

.hero {
    position: relative;
    min-height: 88vh;
    display: flex;
    align-items: center;
    background:
        linear-gradient(100deg, rgba(16,17,20,0.92) 0%, rgba(16,17,20,0.72) 45%, rgba(16,17,20,0.45) 100%),
        url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?w=1600&h=1000&fit=crop') center/cover no-repeat;
}

.hero-container { max-width: 1200px; margin: 0 auto; padding: 100px 24px; width: 100%; }
.hero-content { max-width: 620px; }

.hero-badge {
    display: inline-block;
    background: rgba(232, 114, 12, 0.15);
    border: 1px solid var(--signal);
    color: var(--signal);
    padding: 8px 18px;
    border-radius: 30px;
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.hero h1 { color: var(--paper); font-size: 3.4rem; margin-bottom: 20px; }

.hero-subtitle { color: rgba(255,255,255,0.82); font-size: 1.1rem; max-width: 520px; margin-bottom: 34px; }

.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============================================
   FRANJA DE SERVICIOS DESTACADOS
   ============================================ */

.highlights-strip { background: var(--ink); padding: 40px 0; }
.highlights-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.highlight-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0 20px;
    border-left: 1px solid rgba(255,255,255,0.12);
}
.highlight-item:first-child { border-left: none; padding-left: 0; }
.highlight-icon { font-size: 1.8rem; flex-shrink: 0; }
.highlight-item h3 { color: var(--paper); font-size: 0.95rem; margin-bottom: 4px; }
.highlight-item p { color: rgba(255,255,255,0.6); font-size: 0.85rem; }

/* ============================================
   SERVICIOS
   ============================================ */

.services-section { padding: 100px 0; background: var(--paper); }

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}

.service-card {
    background: var(--concrete);
    border-radius: var(--radius);
    padding: 34px 28px;
    transition: var(--transition);
    opacity: 0; transform: translateY(24px);
}
.service-card.visible { opacity: 1; transform: translateY(0); }
.service-card:hover { background: var(--paper); box-shadow: var(--shadow-hover); transform: translateY(-6px); }

.service-icon { font-size: 2rem; display: block; margin-bottom: 18px; }
.service-card h3 { margin-bottom: 10px; font-size: 1.05rem; }
.service-card p { font-size: 0.92rem; margin-bottom: 16px; }

.service-link {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--signal);
    transition: var(--transition);
}
.service-link:hover { padding-left: 6px; }

/* ============================================
   POR QUÉ ELEGIRNOS
   ============================================ */

.why-section { background: var(--ink); padding: 100px 0; }
.why-section h2 { color: var(--paper); max-width: 700px; margin-bottom: 50px; }

.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.why-item { opacity: 0; transform: translateY(24px); transition: var(--transition); }
.why-item.visible { opacity: 1; transform: translateY(0); }

.why-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px; height: 44px;
    border: 2px solid var(--signal);
    color: var(--signal);
    border-radius: 50%;
    font-weight: 700;
    margin-bottom: 18px;
}
.why-item h3 { color: var(--paper); margin-bottom: 10px; font-size: 1rem; }
.why-item p { color: rgba(255,255,255,0.6); font-size: 0.92rem; }

/* ============================================
   PROYECTOS
   ============================================ */

.projects-section { padding: 100px 0; background: var(--concrete); }

.project-filters {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}
.filter-btn {
    padding: 9px 18px;
    border: 2px solid var(--border);
    background: var(--paper);
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font-display);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: var(--transition);
}
.filter-btn:hover, .filter-btn.active { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}

.project-card { border-radius: var(--radius); overflow: hidden; }

.project-image {
    position: relative;
    height: 260px;
    overflow: hidden;
    border-radius: var(--radius);
}
.project-image img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.project-card:hover .project-image img { transform: scale(1.08); }

/* marco de esquinas tipo plano técnico, aparece en hover */
.project-image::after {
    content: '';
    position: absolute;
    inset: 14px;
    background:
        linear-gradient(var(--signal), var(--signal)) top left / 22px 3px no-repeat,
        linear-gradient(var(--signal), var(--signal)) top left / 3px 22px no-repeat,
        linear-gradient(var(--signal), var(--signal)) top right / 22px 3px no-repeat,
        linear-gradient(var(--signal), var(--signal)) top right / 3px 22px no-repeat,
        linear-gradient(var(--signal), var(--signal)) bottom left / 22px 3px no-repeat,
        linear-gradient(var(--signal), var(--signal)) bottom left / 3px 22px no-repeat,
        linear-gradient(var(--signal), var(--signal)) bottom right / 22px 3px no-repeat,
        linear-gradient(var(--signal), var(--signal)) bottom right / 3px 22px no-repeat;
    opacity: 0;
    transition: opacity 0.3s ease, inset 0.3s ease;
    pointer-events: none;
}
.project-card:hover .project-image::after { opacity: 1; inset: 10px; }

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, rgba(16,17,20,0.88) 0%, rgba(16,17,20,0.1) 55%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 22px;
    opacity: 0;
    transition: var(--transition);
}
.project-card:hover .project-overlay { opacity: 1; }

.project-category {
    color: var(--signal);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 6px;
}
.project-name { color: var(--paper); font-size: 1.05rem; margin-bottom: 12px; }
.btn-project {
    align-self: flex-start;
    font-family: var(--font-display);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--paper);
    border-bottom: 2px solid var(--signal);
    padding-bottom: 3px;
}

/* ============================================
   PROCESO DE TRABAJO
   ============================================ */

.process-section { padding: 100px 0; background: var(--paper); }

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.process-step { opacity: 0; transform: translateY(24px); transition: var(--transition); }
.process-step.visible { opacity: 1; transform: translateY(0); }

.process-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.6rem;
    font-weight: 700;
    color: var(--border);
    margin-bottom: 12px;
}
.process-step h3 { margin-bottom: 10px; font-size: 1rem; }
.process-step p { font-size: 0.92rem; }

/* ============================================
   COTIZACIÓN
   ============================================ */

.quote-section { background: var(--ink); }

.quote-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    align-items: stretch;
}

.quote-image { position: relative; min-height: 100%; }
.quote-image img { width: 100%; height: 100%; object-fit: cover; min-height: 560px; }

.quote-content { padding: 90px 50px; }
.quote-content h2 { color: var(--paper); margin-bottom: 14px; }
.quote-content > p { color: rgba(255,255,255,0.7); margin-bottom: 34px; max-width: 460px; }

.quote-form { display: flex; flex-direction: column; gap: 16px; max-width: 480px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.quote-form input,
.quote-form select,
.quote-form textarea {
    width: 100%;
    padding: 14px 16px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: var(--radius);
    color: var(--paper);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition);
}
.quote-form input::placeholder,
.quote-form textarea::placeholder { color: rgba(255,255,255,0.45); }
.quote-form select { color: rgba(255,255,255,0.85); }
.quote-form select option { background: var(--ink); color: var(--paper); }
.quote-form input:focus,
.quote-form select:focus,
.quote-form textarea:focus {
    outline: none;
    border-color: var(--signal);
    background: rgba(255,255,255,0.1);
}
.quote-form textarea { resize: vertical; min-height: 100px; }

.form-buttons { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 6px; }

/* ============================================
   CONTACTO
   ============================================ */

.contact-section { padding: 100px 0; background: var(--concrete); }

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.contact-card {
    background: var(--paper);
    border-radius: var(--radius);
    padding: 30px 26px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.contact-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.contact-icon { font-size: 1.6rem; display: block; margin-bottom: 14px; }
.contact-card h3 { font-size: 0.95rem; margin-bottom: 8px; }
.contact-card p { font-size: 0.92rem; }
.contact-card a { color: var(--signal); font-weight: 500; }

.map-placeholder { text-align: center; }

/* ============================================
   TESTIMONIOS
   ============================================ */

.testimonials-section { padding: 100px 0; background: var(--paper); }

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}

.testimonial-card {
    background: var(--concrete);
    border-radius: var(--radius);
    padding: 32px 28px;
    opacity: 0; transform: translateY(24px);
    transition: var(--transition);
}
.testimonial-card.visible { opacity: 1; transform: translateY(0); }

.testimonial-stars { color: var(--signal); letter-spacing: 2px; margin-bottom: 16px; }
.testimonial-card > p { color: var(--ink); font-size: 0.98rem; margin-bottom: 22px; font-style: italic; }

.testimonial-author { display: flex; align-items: center; gap: 14px; }
.author-avatar {
    width: 42px; height: 42px;
    border-radius: 50%;
    background: var(--ink);
    color: var(--paper);
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-display);
    font-weight: 600;
    flex-shrink: 0;
}
.testimonial-author strong { display: block; font-size: 0.92rem; }
.testimonial-author span { font-size: 0.82rem; color: var(--cement); }

/* ============================================
   CTA FINAL
   ============================================ */

.cta-final { background: var(--signal); padding: 90px 0; }
.cta-final-content { text-align: center; }
.cta-final h2 { color: var(--ink); margin-bottom: 14px; }
.cta-final p { color: rgba(22,17,20,0.75); font-size: 1.05rem; margin-bottom: 34px; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-final .btn-primary { background: var(--ink); }
.cta-final .btn-primary:hover { background: var(--steel); }
.cta-final .btn-outline-light { border-color: var(--ink); color: var(--ink); }
.cta-final .btn-outline-light:hover { background: var(--ink); color: var(--paper); }

/* ============================================
   FOOTER
   ============================================ */

.footer { background: var(--ink); color: rgba(255,255,255,0.7); padding: 60px 0 20px; }

.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo-text { color: var(--paper); }
.footer-brand p { color: rgba(255,255,255,0.55); font-size: 0.92rem; margin: 14px 0 18px; max-width: 320px; }

.footer-socials { display: flex; gap: 16px; }
.footer-socials a { font-size: 0.88rem; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer-socials a:hover { color: var(--signal); }

.footer-column h4 {
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--paper);
    margin-bottom: 16px;
}
.footer-column ul { list-style: none; }
.footer-column li { margin-bottom: 10px; font-size: 0.9rem; color: rgba(255,255,255,0.55); }
.footer-column a { transition: var(--transition); }
.footer-column a:hover { color: var(--signal); }

.footer-bottom {
    padding-top: 22px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    font-size: 0.82rem;
    color: rgba(255,255,255,0.4);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    h1 { font-size: 2.6rem; }
    h2 { font-size: 2rem; }

    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .why-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
    .process-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .contact-grid { grid-template-columns: repeat(2, 1fr); }
    .testimonials-grid { grid-template-columns: repeat(2, 1fr); }

    .quote-container { grid-template-columns: 1fr; }
    .quote-image { display: none; }
    .quote-content { padding: 70px 40px; }

    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-menu, .btn-cta { display: none; }
    .hamburger { display: flex; }

    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%; left: 0; right: 0;
        background: var(--paper);
        padding: 20px 24px;
        gap: 18px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-hover);
    }

    h1 { font-size: 2.1rem; }
    h2 { font-size: 1.7rem; }

    .hero { min-height: auto; }
    .hero-container { padding: 70px 20px; }
    .hero-buttons { flex-direction: column; }
    .hero-buttons .btn { width: 100%; }

    .highlights-grid { grid-template-columns: 1fr; gap: 22px; }
    .highlight-item { border-left: none; padding: 0; }

    .services-section, .why-section, .projects-section,
    .process-section, .contact-section, .testimonials-section { padding: 60px 0; }

    .services-grid, .why-grid, .projects-grid, .process-grid,
    .contact-grid, .testimonials-grid { grid-template-columns: 1fr; }

    .quote-content { padding: 50px 24px; }
    .form-row { grid-template-columns: 1fr; }
    .form-buttons { flex-direction: column; }
    .form-buttons .btn { width: 100%; }

    .cta-buttons { flex-direction: column; }
    .cta-buttons .btn { width: 100%; }

    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 480px) {
    .container { padding: 0 18px; }
    .navbar-container { padding: 14px 18px; }
    .logo-text { font-size: 0.95rem; }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }

    .hero-badge { font-size: 0.72rem; padding: 7px 14px; }
    .hero-subtitle { font-size: 1rem; }

    .project-image { height: 220px; }
    .project-overlay { opacity: 1; background: linear-gradient(0deg, rgba(16,17,20,0.9) 0%, rgba(16,17,20,0.2) 70%, transparent 100%); }
}

/* ============================================
   ACCESIBILIDAD
   ============================================ */

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
    outline: 2px solid var(--signal);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}