/* CSS Reset & Variables */
:root {
    --primary: #FFB800; /* Solar Gold */
    --primary-dark: #E6A600;
    --secondary: #0A2647; /* Deep Navy */
    --accent: #144272;
    --text-dark: #2C3333;
    --text-light: #F5F5F5;
    --white: #FFFFFF;
    --gray-bg: #F8F9FA;
    --glass: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --transition: all 0.3s ease;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', 'Inter', sans-serif;
}

body {
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden;
    padding-top: 160px;
}

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

@keyframes slideIn {
    from { transform: translateX(-50px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Base Components */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255, 184, 0, 0.4);
}

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

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

/* Top Bar */
.top-bar {
    background: #0a335c;
    color: var(--white);
    padding: 10px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1002;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    align-items: center;
    font-size: 0.95rem;
}

.top-bar a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 700;
}

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

.btn-top-bar {
    display: inline-block;
    padding: 10px 22px;
    border-radius: 50px;
    background: var(--primary);
    color: var(--secondary);
    font-weight: 700;
}

.btn-top-bar:hover {
    background: var(--primary-dark);
}

/* Header */
header {
    background: var(--secondary);
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 40px;
    z-index: 1001;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.logo-text span {
    color: var(--primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

/* Mobile Menu */
.menu-toggle {
    display: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

.nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--secondary);
    padding: 20px;
    text-align: center;
    gap: 20px;
    z-index: 1000;
}

.nav-links.open a {
    display: block;
}

/* Hero Section */
.hero {
    min-height: calc(100vh - 130px);
    background: linear-gradient(rgba(10, 38, 71, 0.7), rgba(10, 38, 71, 0.7)), url('cseinfra_hero.png') center/cover no-repeat;
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--white);
    padding: 90px 0 40px;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    animation: fadeIn 1s ease-out;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* Services */
.section-padding {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 10px;
}

.underline {
    width: 80px;
    height: 4px;
    background: var(--primary);
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 35px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border: 1px solid #eee;
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
}

.service-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.service-card h3 {
    margin-bottom: 15px;
    color: var(--secondary);
}

/* WhatsApp Floating Button */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: #25d366;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    box-shadow: 2px 2px 3px #999;
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    animation: pulse 2s infinite;
}

.whatsapp-float:hover {
    transform: scale(1.1);
}

/* Contact Section */
.contact-section {
    background: var(--secondary);
    color: var(--white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
}

.contact-item i {
    color: var(--primary);
    font-size: 1.2rem;
}

/* Footer */
footer {
    background: #051930;
    color: #ccc;
    padding: 50px 0 20px;
    text-align: center;
}

.footer-content {
    margin-bottom: 30px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 20px 0;
}

.social-links a {
    color: var(--white);
    font-size: 1.5rem;
    transition: var(--transition);
}

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

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero {
        min-height: calc(100vh - 160px);
        padding-top: 100px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }

    .hero-btns {
        flex-direction: column;
        gap: 15px;
    }
    
    .services-grid {
        gap: 20px;
    }

    .service-card {
        padding: 25px;
    }

    .section-padding {
        padding: 70px 0;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .contact-info,
    .contact-form {
        width: 100%;
    }

    .top-bar-content {
        justify-content: center;
        gap: 10px;
    }

    .top-bar a {
        width: 100%;
        text-align: center;
        font-size: 0.95rem;
        padding: 8px 0;
    }

    .top-bar a i {
        margin-right: 8px;
    }

    footer {
        padding: 40px 0 20px;
    }

    .footer-content {
        text-align: center;
    }
}