/* --- CSS VARIABLES & BASE --- */
:root {
    --primary-bg: #0a0a0a;
    --accent-color: #ffffff;
    --text-gray: #b0b0b0;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    --brand-fb: #1877F2;
    --brand-wa: #25D366;
    --brand-tg: #0088cc;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--primary-bg);
    color: var(--accent-color);
    font-family: 'Hind Siliguri', 'Poppins', sans-serif;
    overflow-x: hidden;
    line-height: 1.6;
    width: 100%;
}

/* --- NAVIGATION --- */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 8%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    transition: var(--transition);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid transparent;
}

nav.scrolled {
    padding: 12px 8%;
    background: rgba(10, 10, 10, 0.95);
    border-bottom: 1px solid var(--glass-border);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #fff;
}

.logo-img {
    height: 50px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo-area:hover .logo-img {
    transform: rotate(10deg);
}

.logo-text {
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: 1px;
}

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

.nav-links a {
    text-decoration: none;
    color: #fff;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    opacity: 0.8;
}

.nav-links a:hover {
    opacity: 1;
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

.nav-social-top {
    display: flex;
    gap: 15px;
    margin-left: 20px;
    border-left: 1px solid var(--glass-border);
    padding-left: 20px;
}

.nav-social-top a {
    font-size: 1.1rem;
    color: var(--text-gray);
}

/* --- HERO SECTION --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(circle at center, #1a1a1a 0%, #0a0a0a 100%);
    padding: 100px 5% 60px;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: url('https://www.transparenttextures.com/patterns/carbon-fibre.png');
    opacity: 0.15;
    pointer-events: none;
}

.hero-content {
    z-index: 1;
    max-width: 1000px;
    width: 100%;
}

.hero-h1 {
    font-size: clamp(2rem, 8vw, 4.8rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 25px;
    text-transform: uppercase;
    letter-spacing: -1px;
}

.hero-p {
    font-size: clamp(1rem, 4vw, 1.3rem);
    color: var(--text-gray);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 300;
}

.cta-group {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-btn {
    padding: 16px 45px;
    background: #fff;
    color: #000;
    text-decoration: none;
    font-weight: 700;
    border-radius: 4px;
    transition: var(--transition);
    display: inline-block;
    border: 2px solid #fff;
    text-transform: uppercase;
    font-size: 0.9rem;
    cursor: pointer;
}

.cta-btn.outline {
    background: transparent;
    color: #fff;
}

.cta-btn:hover {
    background: transparent;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(255,255,255,0.1);
}

.cta-btn.outline:hover {
    background: #fff;
    color: #000;
}

/* --- SECTION GENERIC --- */
section {
    padding: 100px 8%;
}

.section-title {
    font-size: clamp(1.8rem, 6vw, 2.8rem);
    text-align: center;
    margin-bottom: 50px;
    position: relative;
    font-weight: 700;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: #fff;
    margin: 20px auto;
}

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

.about-text p {
    color: var(--text-gray);
    margin-bottom: 25px;
    font-size: 1.15rem;
    text-align: justify;
}

.about-image {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    padding: 40px;
    border-radius: 30px;
    text-align: center;
    position: relative;
    overflow: hidden;
    width: 100%;
}

.about-image img {
    max-width: 100%;
    height: auto;
    filter: grayscale(1);
    transition: var(--transition);
    border-radius: 15px;
}

.about-image:hover img {
    filter: grayscale(0);
    transform: scale(1.05);
}

/* --- SERVICES SECTION --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    padding: 40px 30px;
    border-radius: 24px;
    transition: var(--transition);
    text-align: center;
    position: relative;
    height: 100%;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    border-radius: 24px;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.05));
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
}

.service-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-10px);
    border-color: rgba(255,255,255,0.3);
}

.service-card:hover::before { opacity: 1; }

.service-card i {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.service-card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
    color: #fff;
}

/* --- CONTACT FORM --- */
.contact-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--glass);
    padding: clamp(20px, 5vw, 60px);
    border-radius: 30px;
    border: 1px solid var(--glass-border);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-gray);
    font-weight: 500;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 15px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid var(--glass-border);
    color: #fff;
    border-radius: 8px;
    outline: none;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: #fff;
    background: rgba(0, 0, 0, 0.8);
}

.submit-btn {
    width: 100%;
    padding: 18px;
    background: #fff;
    color: #000;
    border: none;
    font-weight: 800;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 8px;
    text-transform: uppercase;
}

.submit-btn:hover {
    background: #e0e0e0;
    transform: scale(1.01);
}

/* --- FOOTER --- */
footer {
    padding: 80px 8% 40px;
    background: #050505;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-about .logo-area {
    margin-bottom: 25px;
}

.footer-about p {
    color: var(--text-gray);
    font-size: 1rem;
    margin-bottom: 15px;
}

.footer-links h4 {
    margin-bottom: 25px;
    font-size: 1.3rem;
    color: #fff;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: #fff;
    padding-left: 8px;
}

.footer-social-title {
    color: #fff;
    font-size: 1.3rem;
    margin-bottom: 25px;
    font-weight: 600;
}

.social-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.social-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 20px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    text-decoration: none;
    color: #fff;
    transition: var(--transition);
}

.social-item i {
    font-size: 1.4rem;
    width: 25px;
    text-align: center;
}

.social-item span {
    font-weight: 500;
    font-size: 0.9rem;
}

.social-item.fb:hover { background: var(--brand-fb); border-color: var(--brand-fb); }
.social-item.wa:hover { background: var(--brand-wa); border-color: var(--brand-wa); }
.social-item.tg:hover { background: var(--brand-tg); border-color: var(--brand-tg); }
.social-item.gr:hover { background: #444; border-color: #666; }

.domain-tag {
    display: inline-block;
    margin-top: 15px;
    background: rgba(255,255,255,0.1);
    padding: 5px 15px;
    border-radius: 50px;
    font-size: 0.85rem;
    color: #fff;
    border: 1px solid var(--glass-border);
}

.copyright {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid var(--glass-border);
    color: var(--text-gray);
    font-size: 0.9rem;
}

/* --- RESPONSIVE ADJUSTMENTS --- */
@media (max-width: 1200px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 992px) {
    nav { padding: 15px 5%; }
    .about-grid { grid-template-columns: 1fr; }
    .nav-links, .nav-social-top { display: none; }
    .form-row { grid-template-columns: 1fr; }
    section { padding: 80px 5%; }
}

@media (max-width: 600px) {
    .footer-grid { grid-template-columns: 1fr; }
    .contact-container { padding: 25px 20px; }
    .hero-h1 { font-size: 2.5rem; }
    .cta-btn { width: 100%; text-align: center; }
    .logo-text { font-size: 1.1rem; }
    .about-image { padding: 20px; }
}

@supports (-webkit-touch-callout: none) {
    .hero { min-height: -webkit-fill-available; }
}