/* ========================================
   AG Alchemy Consultancy Sdn Bhd
   Professional Engineering Consultancy
   Stylesheet - styles.css
   ======================================== */

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-blue: #1a365d;
    --secondary-blue: #2c5282;
    --accent-blue: #63b3ed;
    --dark-bg: #1a202c;
    --dark-gray: #2d3748;
    --light-gray: #f7fafc;
    --white: #ffffff;
    --text-dark: #333333;
    --text-medium: #4a5568;
    --text-light: #718096;
    
    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 60px;
    --spacing-2xl: 80px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-primary);
    line-height: var(--line-height-base);
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

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

a {
    color: var(--secondary-blue);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--accent-blue);
}

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

/* Section Styles */
.section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-blue);
    font-weight: 700;
}

.section-intro {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-medium);
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.8;
}

/* ========================================
   HEADER
   ======================================== */
header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: var(--spacing-md) 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-placeholder {
    width: 80px;
    height: 80px;
    background: var(--white);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--primary-blue);
    font-size: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.company-logo {
    width: 80px;
    height: 80px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: var(--white);
    padding: 8px;
    box-shadow: var(--shadow-sm);
}

.company-info {
    display: flex;
    flex-direction: column;
}

.company-name {
    font-size: 1.5rem;
    font-weight: bold;
    line-height: 1.2;
}

.company-tagline {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-top: 4px;
}

/* Navigation */
nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    margin: 0;
}

nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: opacity var(--transition-base);
    padding: var(--spacing-xs) 0;
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-blue);
    transition: width var(--transition-base);
}

nav a:hover::after {
    width: 100%;
}

nav a:hover {
    opacity: 0.8;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--white);
    transition: var(--transition-base);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    background: linear-gradient(135deg, var(--dark-gray) 0%, var(--dark-bg) 100%);
    color: var(--white);
    padding: 180px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

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

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Statistics */
.stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 3rem;
    font-weight: bold;
    color: var(--accent-blue);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1rem;
    opacity: 0.8;
}

/* CTA Button */
.cta-button {
    display: inline-block;
    background: var(--secondary-blue);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.0625rem;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
}

.cta-button:hover {
    background: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about {
    background: var(--light-gray);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.about-main h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-blue);
    margin-top: var(--spacing-lg);
}

.about-main h3:first-of-type {
    margin-top: 0;
}

.about-main p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    text-align: justify;
}

.about-main ul {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.about-main li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.8;
}

.credentials-list {
    list-style: none;
    margin-left: 0;
}

.credentials-list li {
    padding-left: var(--spacing-md);
    position: relative;
    margin-bottom: var(--spacing-sm);
}

.credentials-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-blue);
    font-weight: bold;
}

/* About Sidebar */
.about-sidebar {
    position: sticky;
    top: 140px;
}

.info-box {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-md);
}

.info-box h4 {
    font-size: 1.125rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--accent-blue);
}

.info-box ul {
    list-style: none;
    margin: 0;
}

.info-box li {
    padding: var(--spacing-xs) 0;
    color: var(--text-medium);
    line-height: 1.6;
}

.credentials {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.credential-badge {
    background: var(--secondary-blue);
    color: var(--white);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 500;
    white-space: nowrap;
}

/* ========================================
   PARTNERS/LEADERSHIP SECTION
   ======================================== */
.partners {
    background: var(--white);
}

.partner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-lg);
}

.partner-card {
    background: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.partner-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.partner-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 3px solid var(--accent-blue);
    text-align: center;
}

.partner-photo {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto var(--spacing-md) auto;
    display: block;
    border: 4px solid var(--accent-blue);
    box-shadow: var(--shadow-lg);
}

.partner-title {
    font-size: 1rem;
    color: var(--text-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.partner-name {
    font-size: 1.75rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.partner-credentials {
    font-size: 0.9375rem;
    color: var(--secondary-blue);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.linkedin-link {
    display: inline-block;
    color: var(--accent-blue);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition-base);
}

.linkedin-link:hover {
    color: var(--secondary-blue);
}

.partner-description h4 {
    font-size: 1.25rem;
    color: var(--primary-blue);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.partner-description h5 {
    font-size: 1.0625rem;
    color: var(--secondary-blue);
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.partner-description p {
    line-height: 1.8;
    color: var(--text-medium);
    margin-bottom: var(--spacing-sm);
    text-align: justify;
}

.partner-description ul {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.partner-description li {
    line-height: 1.8;
    color: var(--text-medium);
    margin-bottom: var(--spacing-xs);
}

.leadership-summary {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--light-gray);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-blue);
}

.leadership-summary h3 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

.leadership-summary p {
    line-height: 1.8;
    color: var(--text-medium);
    text-align: justify;
}

/* Written Papers Section */
.written-papers-section {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.written-papers-section h3 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.papers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.paper-card {
    background: var(--light-gray);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    border-top: 4px solid var(--accent-blue);
    display: block;
    text-decoration: none;
    color: inherit;
}

.paper-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
}

.paper-card h4 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

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

/* ========================================
   SERVICES SECTION
   ======================================== */
.services {
    background: var(--light-gray);
}

.service-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.service-category {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    border-top: 4px solid transparent;
}

.service-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-top-color: var(--accent-blue);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.service-category h3 {
    font-size: 1.25rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.service-category p {
    font-size: 0.9375rem;
    color: var(--text-medium);
    line-height: 1.6;
    margin-bottom: 0;
}

/* Scope Grid */
.scope-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.scope-item {
    padding: var(--spacing-md);
    background: var(--light-gray);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent-blue);
    transition: all var(--transition-base);
}

.scope-item:hover {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    transform: translateX(5px);
}

.scope-item strong {
    color: var(--primary-blue);
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 1rem;
}

.scope-item p {
    font-size: 0.9375rem;
    color: var(--text-medium);
    line-height: 1.6;
    margin: 0;
}

/* ========================================
   DETAILED SERVICES SECTION
   ======================================== */
.detailed-services {
    background: var(--white);
}

.service-detail {
    background: var(--light-gray);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.service-detail-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 3px solid var(--accent-blue);
}

.service-detail-header h3 {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.service-detail-header p {
    font-size: 1.0625rem;
    color: var(--text-medium);
    line-height: 1.8;
}

.service-detail .scope-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.service-detail .scope-item {
    background: var(--white);
    padding: var(--spacing-md);
    position: relative;
}

.scope-number {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 40px;
    height: 40px;
    background: var(--accent-blue);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.875rem;
}

.service-detail .scope-item strong {
    font-size: 1.0625rem;
    padding-right: 50px;
}

/* ========================================
   INDUSTRIES SECTION
   ======================================== */
.industries {
    background: var(--white);
}

.industry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--spacing-md);
}

.industry-card {
    background: var(--light-gray);
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.industry-card:hover {
    border-color: var(--secondary-blue);
    background: var(--white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.industry-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.industry-card h4 {
    font-size: 1rem;
    color: var(--primary-blue);
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--spacing-xs);
}

.industry-card p {
    font-size: 0.875rem;
    color: var(--text-medium);
    line-height: 1.5;
    margin: 0;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
}

.contact .section-title {
    color: var(--white);
}

.contact .section-intro {
    color: rgba(255, 255, 255, 0.9);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.contact-card {
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-base);
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.contact-card h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.contact-details {
    line-height: 1.8;
    font-size: 0.9375rem;
}

.contact-details strong {
    display: block;
    margin-top: var(--spacing-sm);
    margin-bottom: 4px;
    font-weight: 600;
}

.contact-link {
    color: var(--white);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    transition: all var(--transition-base);
    display: inline-block;
}

.contact-link:hover {
    border-bottom-color: var(--white);
    transform: translateY(-1px);
}

.contact-cta {
    margin-top: var(--spacing-xl);
    text-align: center;
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.contact-cta h3 {
    color: var(--white);
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
}

.contact-cta p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.0625rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-md);
    line-height: 1.8;
}

.contact-cta .cta-button {
    background: var(--white);
    color: var(--primary-blue);
}

.contact-cta .cta-button:hover {
    background: var(--light-gray);
}

/* ========================================
   FOOTER
   ======================================== */
footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-section p,
.footer-section li {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-xs);
}

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

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-base);
}

.footer-section a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
}

.footer-bottom p {
    opacity: 0.8;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.visitor-info {
    background: rgba(99, 179, 237, 0.1);
    border: 1px solid rgba(99, 179, 237, 0.3);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    display: inline-block;
}

.visitor-info p {
    margin: 0;
    padding: var(--spacing-xs) 0;
    font-size: 0.9375rem;
}

.visitor-label {
    color: var(--accent-blue);
    font-weight: 600;
    margin-right: var(--spacing-xs);
}

#user-location,
#user-time {
    color: var(--white);
    font-weight: 500;
}

/* ========================================
   BACK TO TOP BUTTON
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--secondary-blue);
    color: var(--white);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    z-index: 999;
}

.back-to-top:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
}

.back-to-top.show {
    display: flex;
}

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

/* Tablets and below */
@media (max-width: 968px) {
    :root {
        --font-size-base: 15px;
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    nav {
        width: 100%;
        display: none;
    }
    
    nav.active {
        display: block;
    }
    
    nav ul {
        flex-direction: column;
        gap: var(--spacing-sm);
        padding: var(--spacing-md) 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
        position: absolute;
        top: 30px;
        right: 20px;
    }
    
    .hero {
        padding: 140px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.0625rem;
    }
    
    .stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-sidebar {
        position: static;
    }
    
    .partner-grid {
        grid-template-columns: 1fr;
    }
    
    .service-categories {
        grid-template-columns: 1fr;
    }

    .papers-grid {
        grid-template-columns: 1fr;
    }

    .scope-grid {
        grid-template-columns: 1fr;
    }
    
    .industry-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Mobile phones */
@media (max-width: 640px) {
    :root {
        --spacing-2xl: 40px;
        --spacing-xl: 30px;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .logo-placeholder {
        width: 60px;
        height: 60px;
        font-size: 1.25rem;
    }

    .company-logo {
        width: 60px;
        height: 60px;
    }

    .company-name {
        font-size: 1.125rem;
    }
    
    .company-tagline {
        font-size: 0.75rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .service-detail {
        padding: var(--spacing-md);
    }
    
    .service-detail-header h3 {
        font-size: 1.5rem;
    }
    
    .partner-card {
        padding: var(--spacing-md);
    }

    .partner-photo {
        width: 150px;
        height: 150px;
    }

    .partner-name {
        font-size: 1.5rem;
    }
    
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
    }
}

/* Print Styles */
@media print {
    header {
        position: static;
    }
    
    .mobile-menu-toggle,
    .back-to-top {
        display: none;
    }
    
    .section {
        page-break-inside: avoid;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Smooth scrolling offset for fixed header */
section {
    scroll-margin-top: 120px;
}