:root {
    --amber: #d4920b;
    --amber-light: #f0a500;
    --amber-glow: rgba(212, 146, 11, 0.15);
    --dark: #0c0c12;
    --dark-card: #13131d;
    --dark-surface: #1a1a28;
    --dark-border: #2a2a3a;
    --text: #e8e8ec;
    --text-muted: #9a9ab0;
    --white: #ffffff;
    --red-accent: #c0392b;
    --green-accent: #27ae60;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.5);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font);
    background: var(--dark);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

/* ===== NAV ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}

.nav.scrolled {
    background: rgba(12, 12, 18, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: 0 2px 24px rgba(0, 0, 0, 0.4);
}

.nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo img {
    height: 72px;
    width: auto;
    transition: var(--transition);
}

.nav.scrolled .nav-logo img { height: 52px; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--white);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    position: relative;
    padding: 4px 0;
    transition: var(--transition);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--amber);
    transition: var(--transition);
}

.nav-links a:hover { color: var(--amber-light); }
.nav-links a:hover::after { width: 100%; }

.nav-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--amber-light);
    font-size: 1rem;
}

.nav-phone svg { width: 18px; height: 18px; }

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: var(--transition);
    border-radius: 2px;
}

/* ===== HERO ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('../images/hero/hero-main.jpg');
    background-size: cover;
    background-position: center;
    transform: scale(1.05);
    transition: transform 8s ease-out;
}

.hero.visible .hero-bg { transform: scale(1); }

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(12, 12, 18, 0.85) 0%,
        rgba(12, 12, 18, 0.6) 50%,
        rgba(12, 12, 18, 0.75) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 140px 0 100px;
    max-width: 720px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--amber-glow);
    border: 1px solid rgba(212, 146, 11, 0.3);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--amber-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 24px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s ease forwards 0.3s;
}

.hero h1 {
    font-size: clamp(2.4rem, 5vw, 3.8rem);
    font-weight: 800;
    line-height: 1.1;
    color: var(--white);
    margin-bottom: 24px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards 0.5s;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--amber), var(--amber-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 560px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards 0.7s;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards 0.9s;
}

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.btn-primary {
    background: linear-gradient(135deg, var(--amber), var(--amber-light));
    color: var(--dark);
    box-shadow: 0 4px 20px rgba(212, 146, 11, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(212, 146, 11, 0.45);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--dark-border);
}

.btn-outline:hover {
    border-color: var(--amber);
    color: var(--amber-light);
    transform: translateY(-2px);
}

.btn svg { width: 18px; height: 18px; }

/* ===== SECTIONS ===== */
section { padding: 100px 0; }

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--amber);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 640px;
    margin: 0 auto;
}

/* ===== SERVICES GRID ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--amber), var(--amber-light));
    opacity: 0;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: rgba(212, 146, 11, 0.3);
    box-shadow: var(--shadow);
}

.service-card:hover::before { opacity: 1; }

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--amber-glow);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.service-icon svg {
    width: 28px;
    height: 28px;
    color: var(--amber-light);
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== ABOUT / SPLIT SECTION ===== */
.about { background: var(--dark-card); }

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 4/3;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-image-badge {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background: rgba(12, 12, 18, 0.9);
    backdrop-filter: blur(10px);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--dark-border);
}

.about-image-badge .number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--amber-light);
    line-height: 1;
}

.about-image-badge .label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.about-text h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 800;
    color: var(--white);
    margin-bottom: 20px;
    line-height: 1.2;
}

.about-text > p {
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 1.05rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}

.stat-item {
    background: var(--dark);
    border-radius: var(--radius-sm);
    padding: 20px;
    border: 1px solid var(--dark-border);
}

.stat-item .value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--amber-light);
    margin-bottom: 4px;
}

.stat-item .desc {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== PARALLAX BANNER ===== */
.parallax-banner {
    position: relative;
    padding: 120px 0;
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.parallax-banner.banner-1 { background-image: url('../images/hero/excavator-crew.jpg'); }
.parallax-banner.banner-2 { background-image: url('../images/hero/excavator-river.jpg'); }

.parallax-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(12, 12, 18, 0.8), rgba(212, 146, 11, 0.15));
}

.parallax-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.parallax-content h2 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
}

.parallax-content p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto 32px;
}

/* ===== PRODUCTS ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    padding: 36px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: var(--transition);
}

.product-card:hover {
    border-color: rgba(212, 146, 11, 0.3);
    transform: translateY(-2px);
}

.product-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--amber-glow);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-icon svg { width: 24px; height: 24px; color: var(--amber-light); }

.product-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.product-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== PROJECTS ===== */
.projects-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.project-item {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    padding: 36px 40px;
    transition: var(--transition);
    position: relative;
}

.project-item:hover {
    border-color: rgba(212, 146, 11, 0.25);
}

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.project-tag {
    display: inline-block;
    background: var(--amber-glow);
    border: 1px solid rgba(212, 146, 11, 0.25);
    color: var(--amber-light);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 5px 14px;
    border-radius: 100px;
}

.project-meta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.project-meta span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.project-item h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}

.project-item > p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
}

.project-detail-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    cursor: pointer;
    color: var(--amber-light);
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    user-select: none;
}

.project-detail-toggle:hover { opacity: 0.8; }

.project-detail-toggle svg {
    transition: transform 0.3s ease;
}

.project-item.expanded .project-detail-toggle svg {
    transform: rotate(180deg);
}

.project-item.expanded .project-detail-toggle .toggle-text::after {
    content: '';
}

.project-expanded {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, margin-top 0.3s ease;
    margin-top: 0;
}

.project-item.expanded .project-expanded {
    max-height: 800px;
    margin-top: 20px;
}

.project-expanded p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 14px;
}

.project-expanded blockquote {
    border-left: 3px solid var(--amber);
    padding: 20px 24px;
    margin: 20px 0 0;
    background: rgba(212, 146, 11, 0.05);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.project-expanded blockquote p {
    color: var(--text);
    font-style: italic;
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.project-expanded blockquote cite {
    display: block;
    color: var(--amber-light);
    font-size: 0.85rem;
    font-weight: 600;
    font-style: normal;
}

/* ===== CERTIFICATIONS ===== */
.certs { background: var(--dark-card); }

.certs-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.cert-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cert-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--dark);
    border-radius: var(--radius-sm);
    border: 1px solid var(--dark-border);
}

.cert-check {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    background: rgba(39, 174, 96, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-check svg { width: 14px; height: 14px; color: var(--green-accent); }

.cert-item span {
    font-size: 0.95rem;
    color: var(--text);
}

.cert-badge {
    text-align: center;
    padding: 48px;
    background: var(--dark);
    border-radius: var(--radius);
    border: 1px solid var(--dark-border);
}

.cert-badge img {
    max-width: 200px;
    margin: 0 auto 24px;
}

.cert-badge h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.cert-badge p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== COMMUNITY ===== */
.community-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.community-text h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 800;
    color: var(--white);
    margin-bottom: 20px;
}

.community-text p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 24px;
}

.community-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.community-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
    font-size: 0.95rem;
}

.community-list li svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--amber-light);
}

.community-image {
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 4/3;
}

.community-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ===== CONTACT ===== */
.contact { background: var(--dark-card); }

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}

.contact-info h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
}

.contact-info > p {
    color: var(--text-muted);
    margin-bottom: 40px;
    font-size: 1.05rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-detail {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-detail-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: var(--amber-glow);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-detail-icon svg { width: 20px; height: 20px; color: var(--amber-light); }

.contact-detail h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 4px;
}

.contact-detail a,
.contact-detail p {
    font-size: 1rem;
    color: var(--white);
    font-weight: 500;
}

.contact-detail a:hover { color: var(--amber-light); }

.contact-form-wrap {
    background: var(--dark);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    padding: 40px;
}

.contact-form { display: flex; flex-direction: column; gap: 20px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-group { display: flex; flex-direction: column; gap: 8px; }

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-group input,
.form-group textarea,
.form-group select {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    color: var(--white);
    font-size: 0.95rem;
    font-family: var(--font);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--amber);
    box-shadow: 0 0 0 3px var(--amber-glow);
}

.form-group textarea { resize: vertical; min-height: 120px; }

.form-group select { cursor: pointer; appearance: none; }

.form-submit {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--amber), var(--amber-light));
    color: var(--dark);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 700;
    font-family: var(--font);
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(212, 146, 11, 0.35);
}

.form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.form-status {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    display: none;
}

.form-status.success {
    display: block;
    background: rgba(39, 174, 96, 0.1);
    color: var(--green-accent);
    border: 1px solid rgba(39, 174, 96, 0.3);
}

.form-status.error {
    display: block;
    background: rgba(192, 57, 43, 0.1);
    color: var(--red-accent);
    border: 1px solid rgba(192, 57, 43, 0.3);
}

/* ===== FOOTER ===== */
.footer {
    padding: 48px 0 32px;
    border-top: 1px solid var(--dark-border);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-logo img { height: 48px; }

.footer-copy {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-links {
    display: flex;
    gap: 24px;
    list-style: none;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.85rem;
    transition: var(--transition);
}

.footer-links a:hover { color: var(--amber-light); }

/* ===== SCROLL ANIMATIONS ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid,
    .certs-content,
    .community-content,
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
    section { padding: 72px 0; }

    .nav-links { display: none; }
    .nav-phone { display: none; }
    .nav-toggle { display: flex; }

    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(12, 12, 18, 0.98);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--dark-border);
    }

    .services-grid { grid-template-columns: 1fr; }
    .products-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }

    .hero-content { padding: 120px 0 80px; }

    .parallax-banner {
        background-attachment: scroll;
        padding: 80px 0;
    }

    .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 2rem; }
    .hero-actions { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
    .about-stats { grid-template-columns: 1fr; }
}