/* ============================================
   BUILDTRON EOOD - Modern Construction Website
   Stylesheet
   ============================================ */

/* CSS Variables */
:root {
    --color-primary: #0F1419;
    --color-secondary: #1a1f26;
    --color-accent: #C8232C;
    --color-accent-dark: #A01620;
    --color-accent-light: #E63946;
    --color-text: #1a1a1a;
    --color-text-muted: #6b7280;
    --color-text-light: #9ca3af;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-border: #e5e7eb;
    --color-white: #ffffff;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --container-width: 1280px;
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    image-orientation: from-image;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-primary);
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
}

h3 {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    margin-bottom: 0.75rem;
}

h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 1rem;
    color: var(--color-text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 4px;
    transition: all var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

.btn-primary {
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(200, 35, 44, 0.4);
}

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

.btn-outline:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
}

.btn-dark {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-dark:hover {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
}

/* ============================================
   HEADER
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: all var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
}

.logo {
    display: flex;
    align-items: center;
    z-index: 101;
}

.logo img {
    height: 60px;
    width: auto;
    display: block;
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 4px;
}

.nav-link {
    display: block;
    padding: 10px 18px;
    color: var(--color-primary);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 4px;
    transition: all var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition);
}

.nav-link:hover {
    color: var(--color-accent);
}

.nav-link.active {
    color: var(--color-accent);
}

.nav-link.active::after {
    width: 24px;
}

.lang-switcher {
    display: flex;
    gap: 4px;
    margin-left: 24px;
    padding-left: 24px;
    border-left: 1px solid rgba(0, 0, 0, 0.1);
}

.lang-link {
    padding: 6px 10px;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 700;
    border-radius: 3px;
    transition: all var(--transition);
    letter-spacing: 0.05em;
}

.lang-link.active {
    color: var(--color-accent);
}

.lang-link:hover {
    color: var(--color-primary);
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 101;
}

.menu-toggle span {
    display: block;
    width: 28px;
    height: 2px;
    background-color: var(--color-primary);
    transition: all var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background-color: var(--color-primary);
    color: var(--color-white);
    overflow: hidden;
    padding-top: 100px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    background: linear-gradient(135deg, #0F1419 0%, #1a1f26 50%, #2a2f36 100%);
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.5;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(200, 35, 44, 0.2) 0%, transparent 70%);
    transform: translateY(-50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 60px 0;
}

.hero-eyebrow {
    display: inline-block;
    padding: 8px 16px;
    background-color: rgba(200, 35, 44, 0.15);
    color: var(--color-accent-light);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: 4px;
    margin-bottom: 24px;
    border: 1px solid rgba(200, 35, 44, 0.4);
}

.hero h1 {
    color: var(--color-white);
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero h1 .accent {
    color: var(--color-accent);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    max-width: 600px;
    line-height: 1.5;
}

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

.hero-stats {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 40px;
    padding: 40px 0;
    margin-top: 60px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-accent-light);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

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

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-eyebrow {
    display: inline-block;
    color: var(--color-accent);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 16px;
}

.why-us .section-eyebrow {
    color: var(--color-accent-light);
}

.section-header p {
    font-size: 1.125rem;
    margin-top: 16px;
}

/* About Section */
.about {
    background-color: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text h2 {
    margin-bottom: 24px;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.05rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.about-features {
    list-style: none;
    margin-top: 32px;
}

.about-features li {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 12px 0;
    color: var(--color-text);
    font-weight: 500;
}

.about-features li::before {
    content: '';
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background-color: var(--color-accent);
    border-radius: 50%;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
    background-position: center;
    background-repeat: no-repeat;
}

.about-image {
    position: relative;
    aspect-ratio: 4/5;
    background-color: var(--color-bg-alt);
    border-radius: 8px;
    overflow: hidden;
}

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

.about-image::after {
    content: '';
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 200px;
    height: 200px;
    background-color: var(--color-accent);
    z-index: -1;
    border-radius: 8px;
}

.about-image .placeholder-text {
    color: rgba(255,255,255,0.4);
    text-align: center;
    padding: 24px;
    font-size: 0.9rem;
}

/* Services Section */
.services {
    background-color: var(--color-bg-alt);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.service-card {
    background-color: var(--color-white);
    padding: 40px 32px;
    border-radius: 8px;
    transition: all var(--transition);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--color-accent);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--transition);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.service-card:hover::before {
    transform: scaleY(1);
}

.service-icon {
    width: 64px;
    height: 64px;
    background-color: rgba(200, 35, 44, 0.08);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--color-accent);
}

.service-icon svg {
    width: 32px;
    height: 32px;
}

.service-card h3 {
    margin-bottom: 12px;
    font-size: 1.4rem;
}

.service-card p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* Projects Section */
.projects {
    background-color: var(--color-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.project-card {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--color-bg-alt);
    cursor: pointer;
    display: block;
    color: inherit;
    text-decoration: none;
}

.project-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

img.project-card-img {
    display: block;
}

.project-card-img-empty {
    background: linear-gradient(135deg, #2a2f36 0%, #1a1f26 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.3);
    font-size: 0.9rem;
    position: relative;
}

.project-card-img-empty::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 30px 30px;
}

.project-card:hover .project-card-img {
    transform: scale(1.05);
}

.project-card-coming {
    cursor: default;
    opacity: 0.85;
}

.project-card-coming .project-card-tag {
    background-color: rgba(255,255,255,0.2);
    color: var(--color-white);
    backdrop-filter: blur(10px);
}

.project-card-coming:hover .project-card-img {
    transform: none;
}

.project-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(to top, rgba(15, 20, 25, 0.95) 0%, rgba(15, 20, 25, 0) 100%);
    color: var(--color-white);
}

.project-card-tag {
    display: inline-block;
    padding: 4px 10px;
    background-color: var(--color-accent);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 3px;
    margin-bottom: 12px;
}

.project-card h3 {
    color: var(--color-white);
    font-size: 1.4rem;
    margin-bottom: 4px;
}

.project-card-meta {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.projects-cta {
    text-align: center;
    margin-top: 60px;
}

/* Why Us Section */
.why-us {
    background-color: var(--color-primary);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.why-us::before {
    content: '';
    position: absolute;
    top: -100px;
    left: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(200, 35, 44, 0.15) 0%, transparent 70%);
}

.why-us h2 {
    color: var(--color-white);
}

.why-us .section-header p {
    color: rgba(255, 255, 255, 0.7);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 40px;
    position: relative;
    z-index: 1;
}

.why-item {
    text-align: center;
}

.why-item-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--color-accent-light);
    line-height: 1;
    margin-bottom: 16px;
}

.why-item h4 {
    color: var(--color-white);
    margin-bottom: 12px;
}

.why-item p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* CTA Section */
.cta {
    background-color: var(--color-accent);
    text-align: center;
    color: var(--color-white);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 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: 40px 40px;
    opacity: 0.6;
}

.cta .container {
    position: relative;
    z-index: 1;
}

.cta h2 {
    color: var(--color-white);
    margin-bottom: 16px;
}

.cta p {
    color: var(--color-white);
    font-size: 1.125rem;
    margin-bottom: 32px;
    opacity: 0.95;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 80px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand img {
    height: 48px;
    margin-bottom: 24px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer h4 {
    color: var(--color-white);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 24px;
}

.footer-list {
    list-style: none;
}

.footer-list li {
    margin-bottom: 12px;
}

.footer-list a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
    transition: color var(--transition);
}

.footer-list a:hover {
    color: var(--color-accent);
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
    margin-bottom: 16px;
    line-height: 1.5;
}

.footer-contact-item svg {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    color: var(--color-accent);
    margin-top: 3px;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.85rem;
    flex-wrap: wrap;
    gap: 16px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

    .about-grid {
        gap: 60px;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }

    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background-color: var(--color-white);
        flex-direction: column;
        align-items: flex-start;
        padding: 100px 32px 32px;
        transition: right var(--transition);
        gap: 0;
        box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    }

    .nav.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        width: 100%;
        gap: 0;
    }

    .nav-link {
        padding: 14px 0;
        font-size: 1.1rem;
        width: 100%;
    }

    .lang-switcher {
        margin: 24px 0 0;
        padding: 24px 0 0;
        border-left: none;
        border-top: 1px solid rgba(0, 0, 0, 0.1);
        width: 100%;
    }

    .hero {
        padding-top: 100px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image {
        max-width: 500px;
        margin: 0 auto;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-up {
    opacity: 0;
    animation: fadeUp 0.8s ease forwards;
}

.fade-up-delay-1 { animation-delay: 0.1s; }
.fade-up-delay-2 { animation-delay: 0.2s; }
.fade-up-delay-3 { animation-delay: 0.3s; }
.fade-up-delay-4 { animation-delay: 0.4s; }