/* 
Global Integral Group - Main Stylesheet
=======================================
Author: Claude 3.7 Sonnet
Version: 1.0
*/

/* ================ GLOBAL STYLES ================ */
:root {
    /* Color Variables */
    --primary-color: #0056b3;
    --primary-dark: #004494;
    --primary-light: #3a7bc8;
    --secondary-color: #00aaff;
    --dark-gray: #333333;
    --medium-gray: #666666;
    --light-gray: #f5f5f5;
    --white: #ffffff;
    --black: #000000;
    --overlay-dark: rgba(0, 0, 0, 0.7);
    --overlay-light: rgba(0, 0, 0, 0.4);
    
    /* Typography */
    --heading-font: 'Montserrat', sans-serif;
    --body-font: 'Lato', sans-serif;
    
    /* Spacing */
    --section-spacing: 100px;
    --container-padding: 15px;
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.5s ease;
    --transition-slow: 0.8s ease;
    
    /* Border Radius */
    --border-radius-small: 4px;
    --border-radius-medium: 8px;
    --border-radius-large: 16px;
    
    /* Box Shadow */
    --box-shadow-light: 0 5px 15px rgba(0, 0, 0, 0.05);
    --box-shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.1);
    --box-shadow-heavy: 0 15px 50px rgba(0, 0, 0, 0.15);
}

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

html {
    font-size: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--body-font);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--medium-gray);
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--heading-font);
    font-weight: 600;
    line-height: 1.3;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: 1.5rem;
}

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

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

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

ul {
    list-style: none;
}

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

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
}

/* ================ BUTTONS ================ */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-family: var(--heading-font);
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

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

.primary-btn:hover {
    background-color: var(--primary-dark);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow-medium);
}

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

.secondary-btn:hover {
    background-color: var(--white);
    color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow-medium);
}

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

.outline-btn:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow-light);
}

/* ================ HEADER ================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--white);
    box-shadow: var(--box-shadow-light);
    transition: all var(--transition-fast);
}

.header.scrolled {
    padding: 10px 0;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--box-shadow-medium);
    backdrop-filter: blur(5px);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    transition: all var(--transition-fast);
}

.logo img {
    height: 45px;
    transition: height var(--transition-fast);
}

.scrolled .logo img {
    height: 35px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--dark-gray);
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--dark-gray);
    transition: all var(--transition-fast);
}

/* ================ HERO SLIDER ================ */
.hero-slider {
    position: relative;
    height: 100vh;
    overflow: hidden;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.slide.active {
    opacity: 1;
    z-index: 1;
}

.slide-bg {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--overlay-dark);
}

.slide-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 2;
    color: var(--white);
    width: 90%;
    max-width: 800px;
    padding: 0 20px;
}

.slide-content h1 {
    color: var(--white);
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards;
}

.slide-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.3s forwards;
}

.slide-content .btn {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.6s forwards;
}

.slider-controls {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    z-index: 10;
}

.slider-dots {
    display: flex;
    gap: 10px;
    margin: 0 20px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dot.active {
    background-color: var(--white);
    transform: scale(1.2);
}

.prev, .next {
    background: transparent;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.prev:hover, .next:hover {
    transform: scale(1.2);
}

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

/* ================ INTRO SECTION ================ */
.intro {
    padding: var(--section-spacing) 0;
    text-align: center;
}

.intro-content {
    max-width: 800px;
    margin: 0 auto;
}

.intro-content h2 {
    margin-bottom: 1.5rem;
}

.intro-content p {
    font-size: 1.2rem;
}

/* ================ SERVICES SECTION ================ */
.services {
    padding: var(--section-spacing) 0;
    background-color: var(--light-gray);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--white);
    border-radius: var(--border-radius-medium);
    padding: 2.5rem 1.5rem;
    text-align: center;
    box-shadow: var(--box-shadow-light);
    transition: box-shadow var(--transition-medium), transform var(--transition-medium), opacity var(--transition-medium);
    opacity: 1 !important;
    transform: none !important;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-medium);
}

.service-icon {
    margin-bottom: 1.5rem;
}

.service-icon i {
    font-size: 3rem;
    color: var(--primary-color);
}

.service-card h3 {
    margin-bottom: 1rem;
}

.service-card p {
    margin-bottom: 1.5rem;
}

.read-more {
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.read-more i {
    transition: transform var(--transition-fast);
}

.read-more:hover i {
    transform: translateX(5px);
}

.services-modern {
    padding: var(--section-spacing) 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%), url('img/services-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.services-modern-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 2.5rem;
    justify-content: center;
    margin-top: 2rem;
}

.service-modern-card {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(60, 60, 120, 0.08);
    padding: 2.5rem 2rem;
    text-align: center;
    flex: 1 1 260px;
    max-width: 320px;
    min-width: 260px;
    transition: transform 0.3s cubic-bezier(.4,2,.3,1), box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.service-modern-card:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 16px 40px rgba(60, 60, 120, 0.15);
}

.service-modern-icon {
    font-size: 2.8rem;
    color: var(--primary-color);
    margin-bottom: 1.2rem;
}

.service-modern-card h3 {
    margin-bottom: 0.8rem;
    font-size: 1.4rem;
    color: var(--primary-dark);
}

.service-modern-card p {
    font-size: 1.05rem;
    color: var(--medium-gray);
    margin-bottom: 1.5rem;
}

.modern-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-color);
    color: #fff;
    padding: 0.7rem 1.5rem;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: background 0.2s;
}

.modern-btn:hover {
    background: var(--primary-dark);
    color: #fff;
}

/* ================ FEATURED PROJECTS ================ */
.featured-projects {
    padding: var(--section-spacing) 0;
}

.project-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 3rem;
}

.project-card {
    border-radius: var(--border-radius-medium);
    overflow: hidden;
    box-shadow: var(--box-shadow-light);
    transition: all var(--transition-medium);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-medium);
}

.project-image {
    height: 250px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-medium);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-info {
    padding: 1.5rem;
    background-color: var(--white);
}

.project-info h3 {
    margin-bottom: 0.5rem;
}

.project-info p {
    margin-bottom: 1.5rem;
}

.view-all-projects {
    text-align: center;
}

/* ================ PARTNERS SECTION ================ */
.partners {
    padding: var(--section-spacing) 0;
    background-color: var(--light-gray);
}

.partners-slider {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.partner {
    flex: 1;
    min-width: 150px;
    max-width: 200px;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all var(--transition-medium);
    text-align: center;
}

.partner:hover {
    filter: grayscale(0);
    opacity: 1;
}

.partner img {
    max-height: 60px;
    margin: 0 auto;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.partner-box {
    background-color: var(--white);
    border-radius: var(--border-radius-medium);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--box-shadow-light);
    transition: all var(--transition-medium);
}

.partner-box:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-medium);
}

.partner-box img {
    height: 80px;
    margin: 0 auto 1.5rem;
}

.partner-box h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.partner-box p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* ================ CONTACT CTA ================ */
.contact-cta {
    padding: var(--section-spacing) 0;
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
}

.contact-cta h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.contact-cta p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

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

/* ================ FOOTER ================ */
.footer {
    background-color: var(--dark-gray);
    color: rgba(255, 255, 255, 0.8);
    padding-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-about {
    grid-column: span 2;
}

.footer-logo {
    height: 40px;
    margin-bottom: 1.5rem;
}

.social-icons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--white);
    transition: all var(--transition-fast);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px);
}

.footer h3 {
    color: var(--white);
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    position: relative;
}

.footer h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-light);
}

.footer ul li {
    margin-bottom: 0.8rem;
}

.footer ul li a {
    color: rgba(255, 255, 255, 0.8);
    transition: all var(--transition-fast);
}

.footer ul li a:hover {
    color: var(--white);
    padding-left: 5px;
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.footer-contact i {
    color: var(--primary-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem 0;
    text-align: center;
}

/* ================ ABOUT SECTION ================ */
.about-section {
    padding: var(--section-spacing) 0;
    background-color: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-content .section-title::after {
    left: 0;
    transform: none;
}

.about-list {
    margin: 1.5rem 0;
    padding-left: 0.5rem;
}

.about-list li {
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.about-list li i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-medium);
    box-shadow: var(--box-shadow-medium);
}

/* ================ RESPONSIVE STYLES ================ */
@media screen and (max-width: 1024px) {
    :root {
        --section-spacing: 80px;
    }
    
    h1 {
        font-size: 3rem;
    }
    
    h2 {
        font-size: 2.2rem;
    }
}

@media screen and (max-width: 768px) {
    :root {
        --section-spacing: 60px;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .nav-links {
        position: fixed;
        top: -100%;
        left: 0;
        width: 100%;
        flex-direction: column;
        background-color: var(--white);
        box-shadow: var(--box-shadow-medium);
        padding: 3rem 0;
        text-align: center;
        gap: 1.5rem;
        transition: top var(--transition-medium);
        z-index: 15;
    }
    
    .nav-links.active {
        top: 85px;
    }
    
    .hamburger {
        display: block;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .hero-slider {
        height: 80vh;
    }
    
    .slide-content h1 {
        font-size: 2.5rem;
    }
    
    .slide-content p {
        font-size: 1rem;
    }
    
    .footer-about {
        grid-column: span 1;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: -1;
    }
}

@media screen and (max-width: 576px) {
    :root {
        --section-spacing: 50px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .section-title {
        margin-bottom: 2rem;
    }
    
    .hero-slider {
        height: 70vh;
    }
    
    .slide-content {
        width: 100%;
    }
    
    .slide-content h1 {
        font-size: 2rem;
    }
    
    .slider-dots {
        gap: 8px;
    }
    
    .dot {
        width: 10px;
        height: 10px;
    }
    
    .intro-content p,
    .contact-cta p {
        font-size: 1rem;
    }
    
    .service-card,
    .project-info {
        padding: 1.5rem 1rem;
    }
}