/* HTUD Holding - Light Theme CSS */
/* Easy to edit - all colors, fonts, and spacing defined at the top */

/* ==================== EASY EDIT SECTION ==================== */
/* Edit these variables to change the entire website appearance */

:root {
    /* COLORS - Edit these to change the website colors */
    --primary-color: #00FFD1;          /* Cyan-green brand color */
    --primary-hover: #00E6BC;          /* Darker shade for hover */
    --primary-light: rgba(0, 255, 209, 0.1); /* Light background */
    
    --background-white: #FFFFFF;       /* Main background */
    --background-gray: #F8F9FA;        /* Light gray sections */
    --background-dark: #1A1A1A;        /* Dark elements */
    
    --text-dark: #2D3748;              /* Main text color */
    --text-gray: #4A5568;              /* Secondary text */
    --text-light: #718096;             /* Light text */
    --text-white: #FFFFFF;             /* White text */
    
    --border-color: #E2E8F0;           /* Borders */
    --shadow-light: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-large: 0 8px 32px rgba(0,0,0,0.2);
    
    /* FONTS - Edit these to change fonts */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* SPACING - Edit these to change spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    --spacing-huge: 96px;
    
    /* CONTAINER - Edit to change page width */
    --container-max-width: 1200px;
    --container-padding: 20px;
}

/* ==================== BASE STYLES ==================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background-white);
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ==================== TYPOGRAPHY ==================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-hover);
}

/* ==================== BUTTONS ==================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 14px 28px;
    font-size: 16px;
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    border: none;
    border-radius: 0; /* Sharp edges as requested */
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1.2;
}

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

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

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

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

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

/* ==================== HEADER ==================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--background-dark);
    font-weight: var(--font-weight-bold);
    font-size: 1.2rem;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-gray);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: var(--primary-light);
}

.nav-link.active {
    color: var(--primary-color);
    background-color: var(--primary-light);
}

/* Mobile Hamburger Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.mobile-menu-toggle:hover {
    background-color: var(--primary-light);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    transition: all 0.3s ease;
    border-radius: 2px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Navigation Sidebar */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--background-white);
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    transition: right 0.3s ease;
    z-index: 999;
    padding-top: 80px;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav .nav-link {
    display: block;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-dark);
    font-size: 1.125rem;
    text-decoration: none;
}

.mobile-nav .nav-link:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

/* Mobile overlay */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

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

.hero {
    padding: calc(80px + var(--spacing-xxl)) 0 var(--spacing-xxl);
    background-color: var(--background-white);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-text {
    padding-right: var(--spacing-lg);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
    line-height: 1.1;
}

.hero-description {
    font-size: 1.25rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
    color: var(--text-gray);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.responsive-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-large);
    transition: transform 0.3s ease;
}

.responsive-image:hover {
    transform: scale(1.02);
}

/* ==================== SECTIONS ==================== */

.section {
    padding: var(--spacing-huge) 0;
}

.section-gray {
    background-color: var(--background-gray);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-gray);
    line-height: 1.6;
}

/* ==================== ABOUT SECTION ==================== */

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
    margin: var(--spacing-xxl) 0;
}

.about-text h3 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--text-gray);
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.group-companies {
    background-color: var(--background-gray);
    padding: var(--spacing-xl);
    border-radius: 12px;
    margin: var(--spacing-xxl) 0;
    border: 1px solid var(--border-color);
}

.group-title {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
}

.companies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.company-card {
    background-color: var(--background-white);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: center;
    font-weight: var(--font-weight-medium);
    transition: all 0.3s ease;
}

.company-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xxl);
}

.feature-card {
    background-color: var(--background-white);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-light);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-color);
}

.feature-title {
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--text-gray);
    line-height: 1.6;
}

/* ==================== CEO SECTION ==================== */

.ceo-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.ceo-image {
    display: flex;
    justify-content: center;
}

.ceo-placeholder {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--background-gray), #e2e8f0);
    border: 2px solid var(--primary-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-lg);
}

.ceo-avatar {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--background-dark);
    margin-bottom: var(--spacing-sm);
}

.ceo-name {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.ceo-title-small {
    font-size: 0.875rem;
    color: var(--text-gray);
}

.ceo-name-title {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.ceo-bio {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--text-gray);
    margin-bottom: var(--spacing-lg);
}

.ceo-quote {
    background-color: var(--primary-light);
    padding: var(--spacing-lg);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
    font-style: italic;
}

.ceo-quote p {
    font-size: 1.125rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.ceo-quote cite {
    font-size: 0.875rem;
    color: var(--text-gray);
    font-style: normal;
}

/* ==================== INDUSTRIES SECTION ==================== */

.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
}

.industry-card {
    background-color: var(--background-white);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-light);
}

.industry-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-color);
}

.industry-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.industry-icon {
    font-size: 2rem;
    color: var(--primary-color);
}

.industry-title {
    color: var(--text-dark);
    font-size: 1.25rem;
}

.industry-description {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.construction-products {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background-color: var(--background-gray);
    border-radius: 8px;
}

.canowin-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--background-white);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.logo-c {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: var(--font-weight-bold);
    font-size: 1.2rem;
}

.canowin-text {
    flex: 1;
}

.canowin-name {
    font-weight: var(--font-weight-semibold);
    font-size: 0.875rem;
    color: var(--text-dark);
}

.canowin-tagline {
    font-size: 0.75rem;
    color: var(--text-gray);
}

.window-product {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    background-color: var(--background-white);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.window-frame {
    width: 60px;
    height: 60px;
    border: 3px solid var(--text-gray);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f8f9fa;
}

.window-glass {
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-gray);
}

.industry-highlights {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-md);
}

.industry-highlights h4 {
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.industry-highlights ul {
    list-style: none;
    padding: 0;
}

.industry-highlights li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--text-gray);
    font-size: 0.875rem;
    line-height: 1.5;
}

.industry-highlights li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: var(--font-weight-bold);
}

/* ==================== PROJECTS SECTION ==================== */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background-color: var(--background-white);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-light);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-color);
}

.project-title {
    color: var(--text-dark);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.project-location {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-gray);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.project-location i {
    color: var(--primary-color);
}

.project-description {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.project-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--background-gray);
    border-radius: 8px;
}

.project-detail {
    text-align: center;
}

.project-detail i {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.detail-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-gray);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.detail-value {
    display: block;
    font-size: 0.875rem;
    color: var(--text-dark);
    font-weight: var(--font-weight-medium);
}

.project-highlights {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-md);
}

.project-highlights h4 {
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-highlights ul {
    list-style: none;
    padding: 0;
}

.project-highlights li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--text-gray);
    font-size: 0.875rem;
    line-height: 1.5;
}

.project-highlights li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: var(--font-weight-bold);
}

/* ==================== CONTACT SECTION ==================== */

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: start;
}

.contact-info h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-dark);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.contact-item i {
    color: var(--primary-color);
    font-size: 1.25rem;
    margin-top: 2px;
}

.contact-item strong {
    display: block;
    color: var(--text-dark);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 2px;
}

.contact-item a {
    color: var(--primary-color);
}

.contact-item span {
    color: var(--text-gray);
}

.contact-form-container {
    background-color: var(--background-gray);
    padding: var(--spacing-xl);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.contact-form-container h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-dark);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
    font-weight: var(--font-weight-medium);
    font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 0; /* Sharp edges */
    font-size: 16px;
    font-family: var(--font-primary);
    background-color: var(--background-white);
    color: var(--text-dark);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

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

.form-message {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: 4px;
    font-size: 0.875rem;
    text-align: center;
    display: none;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

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

.footer {
    background-color: var(--background-dark);
    color: var(--text-white);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
}

.footer-logo .logo-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
}

.footer-description {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-contact-item i {
    color: var(--primary-color);
    width: 16px;
}

.footer-contact-item a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-contact-item a:hover {
    color: var(--primary-color);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

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

@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .ceo-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
}

/* Tablet View */
@media (max-width: 1024px) {
    .hero-content {
        gap: var(--spacing-xl);
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .about-content {
        gap: var(--spacing-xl);
    }
    
    .contact-content,
    .ceo-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .industries-grid,
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    }
}

/* Mobile View */
@media (max-width: 768px) {
    :root {
        --container-padding: 16px;
    }
    
    .nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        padding: calc(70px + var(--spacing-xl)) 0 var(--spacing-xl);
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .hero-text {
        padding-right: 0;
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .about-text {
        order: 2;
    }
    
    .about-image {
        order: 1;
    }
    
    .section {
        padding: var(--spacing-xxl) 0;
    }
    
    .features-grid,
    .industries-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
    
    .companies-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .construction-products {
        grid-template-columns: 1fr;
    }
    
    .project-details {
        grid-template-columns: 1fr;
    }
    
    .ceo-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

/* Small Mobile View */
@media (max-width: 480px) {
    :root {
        --container-padding: 12px;
    }
    
    .header {
        padding: var(--spacing-sm) 0;
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .contact-form-container,
    .group-companies {
        padding: var(--spacing-md);
    }
    
    .companies-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: none;
    }
    
    .industry-card,
    .project-card,
    .feature-card {
        padding: var(--spacing-md);
    }
}

/* Extra Small Devices */
@media (max-width: 320px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .mobile-nav {
        width: 250px;
    }
}

/* ==================== UTILITY CLASSES ==================== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }

/* ==================== ANIMATIONS ==================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth transitions for all interactive elements */
* {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Focus styles for accessibility */
button:focus,
input:focus,
select:focus,
textarea:focus,
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}
/* =====================
   Logo Size Control
   ===================== */

/* Default (desktop/tablet) */
.logo img {
    max-height: 110px;   /* increased for more presence */
    width: auto;
    display: block;
    margin-top: -10px;   /* fine-tunes vertical alignment */
}

/* Mobile (screens ≤ 768px) */
@media (max-width: 768px) {
    .logo img {
        max-height: 70px;  /* still smaller for mobile */
        margin-top: 0;     /* reset alignment for mobile */
    }
}