/* ===========================
   Root Variables & Reset
   =========================== */
:root {
    --primary-color: #1a4d7a;
    --secondary-color: #2980b9;
    --accent-color: #e67e22;
    --dark-bg: #0f1419;
    --light-bg: #f8f9fa;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --white: #ffffff;
    --gradient-1: linear-gradient(135deg, #1a4d7a 0%, #2980b9 100%);
    --gradient-2: linear-gradient(135deg, #2980b9 0%, #3498db 100%);
    --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 25px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

/* ===========================
   Typography
   =========================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }

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

/* ===========================
   Container & Layout
   =========================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===========================
   Navigation
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h2 {
    color: var(--primary-color);
    margin: 0;
    font-size: 1.5rem;
}

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

.nav-links a {
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: var(--transition);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-1);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><path d="M0,300 Q300,100 600,300 T1200,300 L1200,600 L0,600 Z" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: cover;
    opacity: 0.3;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 900px;
    padding: 2rem;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
    display: inline-block;
}

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

.btn-primary:hover {
    background: #d35400;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--white);
    font-size: 2rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 1s ease-in;
}

.fade-in-delay {
    animation: fadeIn 1s ease-in 0.3s both;
}

.fade-in-delay-2 {
    animation: fadeIn 1s ease-in 0.6s both;
}

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

/* ===========================
   Section Styles
   =========================== */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-light);
    font-size: 1.2rem;
}

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

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.about-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
}

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

.card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2rem;
}

.about-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Global Presence */
.global-presence {
    background: var(--white);
    padding: 3rem;
    border-radius: 15px;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-md);
}

.global-presence h3 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

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

.presence-item {
    text-align: center;
    padding: 1.5rem;
}

.presence-item i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.presence-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Core Fabric */
.core-fabric {
    background: var(--gradient-1);
    padding: 3rem;
    border-radius: 15px;
    color: var(--white);
}

.core-fabric h3 {
    text-align: center;
    margin-bottom: 2rem;
}

.fabric-flow {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.fabric-item {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
}

.fabric-item:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.fabric-arrow {
    font-size: 1.5rem;
    opacity: 0.7;
}

/* ===========================
   Services Section
   =========================== */
.services {
    background: var(--white);
}

.services-tabs {
    max-width: 1000px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.tab-button {
    padding: 1rem 2rem;
    background: var(--light-bg);
    border: 2px solid transparent;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    color: var(--text-dark);
}

.tab-button:hover {
    border-color: var(--secondary-color);
}

.tab-button.active {
    background: var(--gradient-1);
    color: var(--white);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease-in;
}

.tab-content.active {
    display: block;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: 15px;
    transition: var(--transition);
    border: 2px solid transparent;
}

.service-card:hover {
    border-color: var(--secondary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.service-card p {
    color: var(--text-light);
}

/* ===========================
   Expertise Section
   =========================== */
.expertise {
    background: var(--light-bg);
}

.expertise-accordion {
    max-width: 1000px;
    margin: 0 auto;
}

.accordion-item {
    background: var(--white);
    margin-bottom: 1.5rem;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    cursor: pointer;
    background: var(--gradient-1);
    color: var(--white);
    transition: var(--transition);
}

.accordion-header:hover {
    background: var(--gradient-2);
}

.accordion-header h3 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.accordion-header i:last-child {
    transition: transform 0.3s ease;
}

.accordion-item.active .accordion-header i:last-child {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.accordion-item.active .accordion-content {
    max-height: 2000px;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    padding: 2rem;
}

.expertise-card {
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid var(--secondary-color);
}

.expertise-card h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.expertise-card ul {
    list-style: none;
    padding: 0;
}

.expertise-card li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-dark);
}

.expertise-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* ===========================
   Case Studies Section
   =========================== */
.case-studies {
    background: var(--white);
}

.case-studies-slider {
    max-width: 1000px;
    margin: 0 auto;
}

.slider-container {
    position: relative;
    min-height: 600px;
}

.case-study-slide {
    display: none;
    animation: fadeIn 0.5s ease-in;
}

.case-study-slide.active {
    display: block;
}

.case-study-content {
    background: var(--light-bg);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.case-number {
    position: absolute;
    top: -20px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    box-shadow: var(--shadow-md);
}

.case-study-content h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-right: 80px;
}

.case-meta {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.case-tag {
    background: var(--secondary-color);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

.case-details {
    display: grid;
    gap: 1.5rem;
}

.case-section h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.case-section h4::before {
    content: '▸';
    color: var(--accent-color);
}

.case-section p {
    color: var(--text-dark);
    line-height: 1.8;
}

.slider-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 2rem;
}

.slider-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-1);
    color: var(--white);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.slider-btn:hover {
    background: var(--gradient-2);
    transform: scale(1.1);
}

.slider-dots {
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--secondary-color);
    width: 30px;
    border-radius: 6px;
}

/* ===========================
   Contact Section
   =========================== */
.contact {
    background: var(--light-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.contact-info h3 {
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: start;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.3rem;
}

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

.contact-item a:hover {
    text-decoration: underline;
}

.contact-form-wrapper {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--text-light);
    transition: var(--transition);
    pointer-events: none;
}

.form-group input:focus + label,
.form-group input:valid + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:valid + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.5rem;
    left: 0.5rem;
    font-size: 0.8rem;
    background: var(--white);
    padding: 0 0.5rem;
    color: var(--secondary-color);
}

/* Phone field specific - keep label in place by default */
.form-group input[type="tel"] + label {
    top: 1rem;
    left: 1rem;
    font-size: 1rem;
    background: transparent;
    padding: 0;
    color: var(--text-light);
}

.form-group input[type="tel"]:focus + label,
.form-group input[type="tel"]:not(:placeholder-shown) + label {
    top: -0.5rem;
    left: 0.5rem;
    font-size: 0.8rem;
    background: var(--white);
    padding: 0 0.5rem;
    color: var(--secondary-color);
}

.form-group select + label {
    top: -0.5rem;
    left: 0.5rem;
    font-size: 0.8rem;
    background: var(--white);
    padding: 0 0.5rem;
    color: var(--text-light);
}

.form-group select:focus + label {
    color: var(--secondary-color);
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 3rem 0 1rem;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

.footer-section a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 968px) {
    .nav-links {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 70%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: right 0.3s ease;
    }

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

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

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

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

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

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

    .fabric-flow {
        flex-direction: column;
    }

    .fabric-arrow {
        transform: rotate(90deg);
    }

    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
}

@media (max-width: 600px) {
    section {
        padding: 3rem 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .case-study-content {
        padding: 2rem 1.5rem;
    }

    .case-study-content h3 {
        font-size: 1.3rem;
        padding-right: 60px;
    }

    .case-number {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
        right: 15px;
    }

    .tab-buttons {
        flex-direction: column;
        width: 100%;
    }

    .tab-button {
        width: 100%;
    }
}

/* ===========================
   Utility Classes
   =========================== */
.text-center { text-align: center; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }