/* ================================================
   VUK Industries - Custom CSS
   Color: #C0392B (Primary Red), #F9F9F9 (Light), #2C3E50 (Dark)
   ================================================ */

/* ---- Root Variables ---- */
:root {
    --primary-red: #C0392B;
    --primary-red-dark: #96281B;
    --primary-red-light: #E74C3C;
    --white: #FFFFFF;
    --light-grey: #F5F6F7;
    --section-grey: #ECEFF1;
    --dark: #2C3E50;
    --text-muted: #7F8C8D;
    --border-color: #DEE2E6;
    --font-main: 'Roboto', sans-serif;
    --font-heading: 'Montserrat', sans-serif;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 32px rgba(192,57,43,0.18);
    --radius: 12px;
    --transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
}

/* ---- Base ---- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-main);
    color: var(--dark);
    background: var(--white);
    overflow-x: hidden;
}

/* ---- Section Utilities ---- */
.section-padding { padding: 80px 0; }
.bg-light-grey { background-color: var(--light-grey); }

.section-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: 12px;
}
.section-title-white {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}
.section-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    margin-top: 12px;
}
.section-divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-red), var(--primary-red-light));
    border-radius: 2px;
    margin-bottom: 8px;
}
.divider-white { background: rgba(255,255,255,0.6); }

/* ---- Buttons ---- */
.btn-primary-red {
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    color: var(--white);
    border: none;
    padding: 12px 30px;
    font-weight: 600;
    font-family: var(--font-heading);
    border-radius: 6px;
    letter-spacing: 0.5px;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    position: relative;
    overflow: hidden;
}
.btn-primary-red:hover {
    background: linear-gradient(135deg, var(--primary-red-light), var(--primary-red));
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}
.btn-outline-white {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.8);
    padding: 10px 28px;
    font-weight: 600;
    font-family: var(--font-heading);
    border-radius: 6px;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
}
.btn-outline-white:hover {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-color: #fff;
}

/* ================================================
   NAVBAR
   ================================================ */
#mainNavbar {
    padding: 4px 0;
    border-bottom: 2px solid var(--border-color);
    transition: var(--transition);
    z-index: 9999;
}
#mainNavbar.scrolled {
    box-shadow: 0 2px 20px rgba(0,0,0,0.12);
}
/* Navbar Logo Image */
.navbar-logo {
    height: 70px;
    width: auto;
    object-fit: contain;
    transition: var(--transition);
}
.navbar-logo:hover { opacity: 0.88; }
.nav-link {
    font-family: var(--font-heading);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--dark) !important;
    padding: 8px 14px !important;
    border-radius: 4px;
    transition: var(--transition);
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 14px;
    right: 14px;
    height: 2px;
    background: var(--primary-red);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}
.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}
.nav-link:hover,
.nav-link.active {
    color: var(--primary-red) !important;
    background: rgba(192,57,43,0.06);
}

/* ================================================
   HERO SECTION
   ================================================ */
.hero-section {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    overflow: hidden;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(20,20,30,0.80) 0%,
        rgba(40,10,10,0.65) 50%,
        rgba(192,57,43,0.25) 100%
    );
}
.hero-content {
    position: relative;
    z-index: 2;
    padding: 100px 0 80px;
}
.hero-text { max-width: 650px; }
.hero-title {
    font-family: var(--font-heading);
    font-size: 3.8rem;
    font-weight: 800;
    color: var(--primary-red);
    line-height: 1.1;
    text-shadow: 2px 4px 12px rgba(0,0,0,0.4);
    margin-bottom: 16px;
}
.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    font-weight: 300;
    letter-spacing: 0.5px;
    margin-bottom: 24px;
}
.hero-badges { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.hero-badge {
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(8px);
    color: rgba(255,255,255,0.95);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.2);
}

/* Hero Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}
.animate-fadeInUp { animation: fadeInUp 0.8s ease both; }
.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

/* ================================================
   SERVICES SECTION
   ================================================ */
.service-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 45px 35px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
}
.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}
.service-hover-line {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-red), var(--primary-red-light));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}
.service-card:hover .service-hover-line { transform: scaleX(1); }

.service-icon-circle {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    transition: var(--transition);
}
.service-icon-circle i {
    font-size: 2.2rem;
    color: white;
}
.service-card:hover .service-icon-circle {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 24px rgba(192,57,43,0.35);
}
.service-title {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--primary-red);
    margin: 0 0 12px;
    font-size: 1.15rem;
}
.service-text { color: #555; font-size: 0.95rem; line-height: 1.7; }

/* ================================================
   ABOUT US SECTION
   ================================================ */
.about-section { background: var(--section-grey); }
.about-img-container { position: relative; display: inline-block; width: 100%; }
.about-img {
    width: 100%;
    border-radius: var(--radius);
    transition: var(--transition);
}
.about-img:hover { transform: scale(1.02); }
.about-badge {
    position: absolute;
    bottom: -20px;
    right: 20px;
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(192,57,43,0.4);
    border: 3px solid white;
}
.badge-inner { text-align: center; color: white; }
.badge-number { display: block; font-family: var(--font-heading); font-weight: 800; font-size: 1rem; }
.badge-label { display: block; font-size: 0.65rem; font-weight: 600; }
.badge-sub { display: block; font-size: 0.6rem; opacity: 0.85; }

.about-text { color: #555; line-height: 1.8; font-size: 0.97rem; margin-bottom: 16px; }
.about-stats { border-top: 1px solid var(--border-color); padding-top: 20px; }
.stat-number {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary-red);
    line-height: 1;
}
.stat-unit { font-size: 0.75rem; color: var(--text-muted); }
.stat-label { font-size: 0.78rem; color: var(--text-muted); font-weight: 500; margin-top: 4px; }

/* ================================================
   ADVANTAGES SECTION
   ================================================ */
.advantages-section { background: var(--white); }
.advantage-item {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
    align-items: flex-start;
}
.adv-icon {
    font-size: 1.6rem;
    color: var(--primary-red);
    flex-shrink: 0;
    margin-top: 2px;
}
.advantage-item h5 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 6px;
}
.advantage-item p { color: #555; font-size: 0.92rem; line-height: 1.7; margin: 0; }

/* Comparison Cards */
.comparison-card {
    background: var(--light-grey);
    border-radius: 10px;
    padding: 16px;
    text-align: center;
    border: 2px solid transparent;
    transition: var(--transition);
}
.comparison-card:hover { border-color: var(--primary-red); box-shadow: var(--shadow); }
.comparison-label {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    padding: 4px 10px;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 12px;
}
.red-label { background: rgba(192,57,43,0.1); color: var(--primary-red); }
.green-label { background: rgba(39,174,96,0.1); color: #27AE60; }

/* Visual diagrams */
.comparison-grid-visual { padding: 8px; }
.bar-row { display: flex; align-items: center; margin-bottom: 6px; height: 10px; }
.bar { background: #555; height: 6px; border-radius: 2px; }
.bar-left { width: 45%; }
.bar-right { width: 45%; }
.lap-zone { width: 30%; height: 12px; background: rgba(192,57,43,0.35); border: 1px dashed var(--primary-red); border-radius: 2px; margin: 0 -5px; }
.coupler-row { justify-content: center; }
.coupler-box { width: 14%; height: 14px; background: #888; border-radius: 3px; margin: 0 2px; border: 1px solid #555; }

/* Product Showcase */
.product-img-wrap {
    background: var(--light-grey);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    min-height: 220px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.product-img { max-height: 200px; object-fit: contain; }
.product-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 10px;
    font-weight: 500;
}
.carousel-indicators { position: relative !important; }
.carousel-indicators button {
    width: 10px !important;
    height: 10px !important;
    border-radius: 50% !important;
    background-color: var(--primary-red) !important;
    opacity: 0.3;
}
.carousel-indicators button.active { opacity: 1; }

.advantage-highlights { display: flex; gap: 16px; flex-wrap: wrap; }
.highlight-item {
    display: flex;
    gap: 12px;
    align-items: center;
    background: var(--light-grey);
    border-radius: 10px;
    padding: 12px 16px;
    flex: 1;
    min-width: 140px;
    transition: var(--transition);
}
.highlight-item:hover { background: rgba(192,57,43,0.06); transform: translateY(-2px); }
.highlight-icon {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.highlight-icon i { color: white; font-size: 1rem; }
.highlight-title { font-weight: 700; font-size: 0.88rem; color: var(--dark); }
.highlight-desc { font-size: 0.78rem; color: var(--text-muted); }

/* ================================================
   PROCESS SECTION
   ================================================ */
.process-section { background: var(--light-grey); }
.process-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px 30px 35px;
    box-shadow: var(--shadow);
    position: relative;
    transition: var(--transition);
    height: 100%;
}
.process-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 36px rgba(0,0,0,0.12);
}
.process-card-center {
    background: linear-gradient(145deg, var(--white), #FFF5F4);
    border: 2px solid rgba(192,57,43,0.2);
}
.process-step-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    color: rgba(192,57,43,0.1);
    position: absolute;
    top: 12px;
    right: 20px;
    line-height: 1;
}
.process-img-container {
    padding: 16px;
    text-align: center;
    min-height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}
.process-img { max-height: 150px; object-fit: contain; }
.process-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: 12px;
}
.process-desc { color: #555; font-size: 0.92rem; line-height: 1.7; }

/* ================================================
   FEATURES SECTION
   ================================================ */
.features-section {
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-dark) 100%);
    position: relative;
    overflow: hidden;
}
.features-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: rgba(255,255,255,0.04);
}
.features-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255,255,255,0.04);
}
.feature-group {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(4px);
    border-radius: var(--radius);
    padding: 35px 30px;
    border: 1px solid rgba(255,255,255,0.15);
    transition: var(--transition);
    position: relative;
    z-index: 2;
    height: 100%;
}
.feature-group:hover {
    background: rgba(255,255,255,0.16);
    transform: translateY(-4px);
}
.feature-group-icon {
    width: 58px; height: 58px;
    background: rgba(255,255,255,0.2);
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 18px;
}
.feature-group-icon i { font-size: 1.6rem; color: rgba(255,255,255,0.95); }
.feature-group-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--white);
    margin-bottom: 16px;
}
.feature-list { list-style: none; padding: 0; margin: 0; }
.feature-list li {
    color: rgba(255,255,255,0.88);
    font-size: 0.92rem;
    padding: 6px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.feature-list li:last-child { border-bottom: none; }
.feature-list li i { font-size: 0.75rem; color: rgba(255,255,255,0.6); flex-shrink: 0; }

/* ================================================
   CONTACT SECTION
   ================================================ */
.contact-section { background: var(--section-grey); }
.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 28px;
}
.contact-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    height: 100%;
}
.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}
.contact-icon-box {
    width: 62px; height: 62px;
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.contact-icon-box i { color: white; font-size: 1.4rem; }
.contact-label {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: 4px;
    font-size: 0.9rem;
}
.contact-value {
    color: #555;
    text-decoration: none;
    line-height: 1.7;
    font-size: 0.95rem;
    transition: color 0.3s;
}
.contact-value:hover { color: var(--primary-red); }

/* Social Buttons */
.social-links { display: flex; gap: 12px; }
.social-btn {
    width: 44px; height: 44px;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}
.social-btn:hover { transform: translateY(-3px) scale(1.08); color: white; }
.facebook { background: #1877F2; }
.instagram { background: linear-gradient(45deg, #f09433, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888); }
.linkedin { background: #0A66C2; }

/* Contact Form */
.contact-form-wrapper {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
}
.form-heading {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: 12px;
}
.form-control {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
    font-size: 0.9rem;
}
.form-control:focus {
    border-color: var(--primary-red);
    box-shadow: 0 0 0 3px rgba(192,57,43,0.08);
}
.form-floating > label { color: var(--text-muted); font-size: 0.88rem; }
.send-btn {
    font-family: var(--font-heading);
    letter-spacing: 1px;
    font-size: 0.95rem;
    padding: 14px;
}

/* ================================================
   FOOTER
   ================================================ */
.site-footer {
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    color: rgba(255,255,255,0.92);
    text-align: center;
    padding: 22px 0;
    font-size: 0.9rem;
    font-weight: 400;
}

/* ================================================
   BACK TO TOP BUTTON
   ================================================ */
.back-to-top-btn {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    color: white;
    border: none;
    box-shadow: 0 4px 16px rgba(192,57,43,0.45);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 9998;
}
.back-to-top-btn.visible {
    opacity: 1;
    transform: translateY(0);
}
.back-to-top-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(192,57,43,0.55);
}

/* ================================================
   SCROLL REVEAL ANIMATIONS
   ================================================ */
.reveal {
    opacity: 0;
    transform: translateY(35px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}
.reveal-left {
    opacity: 0;
    transform: translateX(-35px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}
.reveal-right {
    opacity: 0;
    transform: translateX(35px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 991.98px) {
    .hero-title { font-size: 2.6rem; }
    .hero-section { min-height: 70vh; }
    .section-padding { padding: 60px 0; }
    .section-title, .section-title-white { font-size: 1.65rem; }
    .about-badge { bottom: 10px; right: 10px; width: 75px; height: 75px; }
}
@media (max-width: 767.98px) {
    .hero-title { font-size: 2rem; }
    .hero-badges { flex-direction: column; gap: 8px; }
    .hero-badge { font-size: 0.75rem; }
    .section-padding { padding: 50px 0; }
    .contact-form-wrapper { padding: 24px 20px; }
    .advantage-highlights { gap: 8px; }
    .highlight-item { min-width: 120px; }
}