/* ================================================
   BEXENGROUP.CL — Premium Corporate Stylesheet
   Mining & Electrical Engineering
   ================================================ */

:root {
    --primary:          #011a51;
    --primary-light:    #0a2d75;
    --primary-dark:     #000b2b;
    --accent:           #f5c800;
    --accent-dark:      #c9a000;
    --white:            #ffffff;
    --off-white:        #f6f8fb;
    --text-dark:        #0d1624;
    --text-muted:       #5a6373;
    --border:           #d1d8e2;

    --shadow-sm:  0 2px 8px rgba(1,26,81,0.08);
    --shadow-md:  0 8px 28px rgba(1,26,81,0.14);
    --shadow-lg:  0 20px 50px rgba(1,26,81,0.20);
    --shadow-glow:0 0 24px rgba(245,200,0,0.45);

    --font-heading: 'Oswald', 'Arial Narrow', Arial, sans-serif;
    --font-body:    'Inter', Arial, sans-serif;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;

    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ── */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html  { scroll-behavior: smooth; font-size: 16px; }
body  {
    font-family: var(--font-body);
    color: var(--text-dark);
    background: var(--white);
    line-height: 1.65;
    overflow-x: hidden;
}
img   { display:block; max-width:100%; }
a     { text-decoration:none; color:inherit; transition:color var(--transition); }
ul    { list-style:none; }

/* ── Utilities ── */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}
.section        { padding: 6rem 0; }
.section--dark  { background: var(--primary-dark); color: var(--white); }
.section--gray  { background: var(--off-white); }
.section-header { margin-bottom: 3.5rem; }
.section-header.center { text-align:center; }
.section-header h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    font-weight: 700;
    line-height: 1.15;
    color: var(--primary-dark);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.section-header.center h2 { color: inherit; }
.section-header p {
    margin-top: .7rem;
    color: var(--text-muted);
    font-size: 1.05rem;
}
.divider {
    width: 60px; height: 5px;
    background: var(--accent);
    border-radius: 3px;
    margin-top: 1rem;
}
.divider.center { margin: 1rem auto 0; }

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .85rem 2.2rem;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition);
}
.btn-primary {
    background: var(--accent);
    color: var(--primary-dark);
    border-color: var(--accent);
}
.btn-primary:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}
.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: rgba(255,255,255,0.7);
}
.btn-outline:hover {
    background: rgba(255,255,255,0.12);
    border-color: var(--white);
    transform: translateY(-3px);
}

/* ── Navbar ── */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: var(--primary-dark);
    border-bottom: 3px solid var(--accent);
    padding: .95rem 0;
    transition: box-shadow var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow-md); }
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
    gap: .6rem;
}
.logo a { display: flex; align-items: center; }
.logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
    display: block;
    filter: brightness(1.05);
}
.footer-logo-img {
    height: 64px;
    width: auto;
    object-fit: contain;
    margin-bottom: 1.2rem;
    display: block;
    filter: brightness(1.05);
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.nav-links a {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 500;
    color: rgba(255,255,255,.85);
    text-transform: uppercase;
    letter-spacing: .5px;
    padding-bottom: 3px;
    border-bottom: 2px solid transparent;
    transition: all var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}
.nav-cta {
    background: var(--accent);
    color: var(--primary-dark) !important;
    padding: .4rem 1.2rem;
    border-radius: var(--radius-sm);
    border-bottom: none !important;
    font-weight: 700 !important;
}
.nav-cta:hover {
    background: var(--accent-dark) !important;
    color: var(--primary-dark) !important;
    border-bottom: none !important;
}

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-toggle span {
    display: block;
    width: 26px; height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all var(--transition);
}

/* ── Hero ── */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image:
        linear-gradient(to bottom right, rgba(0,11,43,.72) 0%, rgba(1,26,81,.55) 100%),
        url('./images/img_1_66.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding: 100px 2rem 4rem;
    text-align: center;
    position: relative;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 80px;
    background: linear-gradient(to top, var(--off-white), transparent);
    pointer-events: none;
}
.hero-content {
    max-width: 860px;
    position: relative;
    z-index: 1;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    background: var(--accent);
    color: var(--primary-dark);
    font-family: var(--font-heading);
    font-size: .85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding: .4rem 1.2rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
}
.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--white);
    text-transform: uppercase;
    line-height: 1.1;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 12px rgba(0,0,0,.4);
}
.hero-title em {
    font-style: normal;
    color: var(--accent);
}
.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255,255,255,.88);
    max-width: 640px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}
.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 4rem;
    flex-wrap: wrap;
}
.hero-stat {
    text-align: center;
    color: var(--white);
}
.hero-stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}
.hero-stat-label {
    font-size: .85rem;
    color: rgba(255,255,255,.75);
    text-transform: uppercase;
    letter-spacing: .5px;
    margin-top: .3rem;
}

/* ── About ── */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}
.about-text p { color: var(--text-muted); margin-bottom: 1rem; font-size: 1.02rem; }
.about-text h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--primary);
    text-transform: uppercase;
    margin: 2rem 0 .8rem;
}
.feature-list { margin-top: .5rem; display: flex; flex-direction: column; gap: .6rem; }
.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: .75rem;
    color: var(--text-muted);
    font-size: .97rem;
}
.feature-list li::before {
    content: '✓';
    flex-shrink: 0;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--primary-dark);
    font-weight: 900;
    font-size: .8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 2px;
}
.about-image-wrap {
    position: relative;
}
.about-image-wrap img {
    width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}
.exp-badge {
    position: absolute;
    bottom: -24px; left: -24px;
    background: var(--primary);
    color: var(--white);
    padding: 1.4rem 1.8rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border-left: 5px solid var(--accent);
    display: flex;
    flex-direction: column;
    align-items: center;
}
.exp-badge-num {
    font-family: var(--font-heading);
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--accent);
    line-height: 1;
}
.exp-badge-text {
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: rgba(255,255,255,.8);
    margin-top: .3rem;
    white-space: nowrap;
}

/* ── Services strip ── */
.services-strip {
    background: var(--primary);
    padding: 4rem 0;
}
.services-strip-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
    text-align: center;
}
.service-item {
    color: var(--white);
    padding: 1.5rem 1rem;
    border-radius: var(--radius-md);
    transition: background var(--transition);
}
.service-item:hover { background: rgba(255,255,255,.08); }
.service-icon {
    font-size: 2.2rem;
    margin-bottom: .8rem;
    display: block;
    color: var(--accent);
}
.service-item h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: .5px;
}

/* ── Projects ── */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
    gap: 2rem;
}
.project-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
}
.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}
.project-img {
    height: 220px;
    overflow: hidden;
    background: var(--off-white);
}
.project-img img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform .6s ease;
}
.project-card:hover .project-img img { transform: scale(1.06); }
.project-content { padding: 1.5rem; }
.project-tag {
    display: inline-block;
    background: var(--accent);
    color: var(--primary-dark);
    font-family: var(--font-heading);
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .5px;
    padding: .25rem .75rem;
    border-radius: 50px;
    margin-bottom: .75rem;
}
.project-content h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: .4rem;
    text-transform: uppercase;
}
.project-client {
    font-size: .88rem;
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: .9rem;
}
.project-content ul { display: flex; flex-direction: column; gap: .4rem; }
.project-content ul li {
    font-size: .9rem;
    color: var(--text-muted);
    padding-left: 1rem;
    position: relative;
}
.project-content ul li::before {
    content: '›';
    position: absolute; left: 0;
    color: var(--accent-dark);
    font-weight: 700;
}

/* ── Clients banner ── */
.clients-banner {
    background: var(--off-white);
    padding: 3rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.clients-label {
    text-align: center;
    font-family: var(--font-heading);
    font-size: .85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
}
.clients-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 3rem;
}
.clients-logos img {
    max-height: 45px;
    object-fit: contain;
    filter: grayscale(100%) opacity(0.55);
    transition: filter var(--transition);
}
.clients-logos img:hover { filter: grayscale(0%) opacity(1); }

/* ── Footer ── */
.footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,.85);
    padding: 3rem 0 1.5rem;
    border-top: 4px solid var(--accent);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid rgba(255,255,255,.12);
}
.footer-brand h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--white);
    margin-bottom: .5rem;
}
.footer-brand h2 span { color: var(--accent); }
.footer-brand p {
    font-size: .9rem;
    color: rgba(255,255,255,.55);
    line-height: 1.7;
    margin-bottom: 1.2rem;
}
.social-icons {
    display: flex;
    gap: .7rem;
}
.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,.08);
    color: rgba(255,255,255,.8);
    font-size: 1rem;
    transition: all var(--transition);
}
.social-icons a:hover {
    background: var(--accent);
    color: var(--primary-dark);
    transform: translateY(-3px);
}
.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.2rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: .6rem; }
.footer-col ul li {
    font-size: .9rem;
    color: rgba(255,255,255,.6);
    transition: color var(--transition);
}
.footer-col ul li:hover { color: var(--white); }
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: .7rem;
    font-size: .9rem;
    color: rgba(255,255,255,.65);
    margin-bottom: .7rem;
}
.contact-item i {
    color: var(--accent);
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 2px;
}
.footer-partners {
    margin-top: 1.5rem;
}
.footer-partners img {
    max-height: 60px;
    object-fit: contain;
    filter: brightness(0) invert(1) opacity(0.45);
    transition: filter var(--transition);
}
.footer-partners img:hover { filter: brightness(0) invert(1) opacity(0.9); }
.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    font-size: .82rem;
    color: rgba(255,255,255,.35);
}

/* ── Animations ── */
.fade-in {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .75s ease, transform .75s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ── Contact Section ── */
.contact-section { background: var(--white); }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: start;
}
.contact-info-card {
    background: var(--off-white);
    border-radius: var(--radius-md);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    border: 1px solid var(--border);
}
.contact-item-lg {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.contact-icon-box {
    width: 44px; height: 44px;
    background: var(--primary);
    color: var(--accent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.contact-label {
    font-size: .78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .5px;
    font-weight: 600;
}
.contact-value {
    font-size: .97rem;
    color: var(--text-dark);
    font-weight: 600;
    margin-top: .1rem;
}

/* Contact Form */
.contact-form-wrap {
    background: var(--off-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 2.5rem;
}
.contact-form { display: flex; flex-direction: column; gap: 1.2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: .4rem; }
.form-group label {
    font-size: .82rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: .5px;
}
.form-group input,
.form-group select,
.form-group textarea {
    padding: .75rem 1rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: .95rem;
    color: var(--text-dark);
    background: var(--white);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
    width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(1,26,81,.08);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-success {
    display: flex;
    align-items: center;
    gap: .75rem;
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #6ee7b7;
    border-radius: var(--radius-sm);
    padding: .85rem 1.2rem;
    font-size: .95rem;
    font-weight: 600;
}

/* ── Mobile nav open ── */
@media (max-width: 768px) {
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0; right: 0;
        background: var(--primary-dark);
        padding: 1rem 2rem 1.5rem;
        border-top: 2px solid var(--accent);
        gap: 1rem;
    }
}

/* ── Responsive ── */
@media (max-width: 960px) {
    .about-grid { grid-template-columns: 1fr; gap: 3rem; }
    .about-image-wrap { margin-bottom: 2rem; }
    .exp-badge { bottom: -16px; left: -8px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}
@media (max-width: 768px) {
    .section { padding: 4rem 0; }
    .hero-title { font-size: 2.2rem; }
    .nav-links { display: none; }
    .nav-toggle { display: flex; }
    .hero-stats { gap: 2rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .projects-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .contact-form-wrap { padding: 1.5rem; }
}

/* ── WhatsApp FAB ── */
.whatsapp-fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 999;
    width: 58px; height: 58px;
    background: #25d366;
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.7rem;
    box-shadow: 0 6px 20px rgba(37,211,102,.5);
    transition: transform var(--transition), box-shadow var(--transition);
    text-decoration: none;
}
.whatsapp-fab:hover {
    transform: scale(1.12) translateY(-3px);
    box-shadow: 0 10px 28px rgba(37,211,102,.65);
}
.fab-tooltip {
    position: absolute;
    right: 68px;
    background: var(--primary-dark);
    color: var(--white);
    font-family: var(--font-body);
    font-size: .82rem;
    font-weight: 600;
    padding: .4rem .9rem;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
}
.fab-tooltip::after {
    content: '';
    position: absolute;
    top: 50%; right: -6px;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: var(--primary-dark);
    border-right: 0;
}
.whatsapp-fab:hover .fab-tooltip { opacity: 1; }

/* ── Back to top ── */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 999;
    width: 44px; height: 44px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: all var(--transition);
}
.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--primary-light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}