/* 
    Coral Infratel Premium CSS System 
    Design Aesthetic: Modern, High-End Corporate, Dark/Light Hybrid 
*/

:root {
    --primary: #e31837;
    /* Coral Red */
    --primary-light: #ff4d6d;
    --secondary: #0f172a;
    /* Deep Navy */
    --accent: #38bdf8;
    /* Sky Blue for BSNL accents */
    --bg-light: #f8fafc;
    --text-dark: #0f172a;
    --text-muted: #64748b;
    --glass: rgba(255, 255, 255, 0.7);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-light);
    overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
    font-weight: 800;
    line-height: 1.1;
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    background: transparent;
    transition: var(--transition);
}

.header.scrolled {
    background: var(--glass);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    box-shadow: var(--shadow);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
}

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

.logo img {
    height: 45px;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-dark);
}

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

.btn-primary {
    background: var(--primary);
    color: white !important;
    padding: 12px 25px;
    border-radius: 50px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(227, 24, 55, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    background: var(--primary-light);
}

/* Hero Section */
.hero {
    padding-top: 180px;
    padding-bottom: 100px;
    background: linear-gradient(135deg, #f1f5f9 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    top: -10%;
    right: -5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(227, 24, 55, 0.05) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
}

.hero-flex {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 60px;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 25px;
    color: var(--secondary);
}

.hero-content h1 span {
    color: var(--primary);
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.hero-image img {
    width: 100%;
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

/* Features Section */
.section {
    padding: 100px 0;
}

.section-tag {
    color: var(--primary);
    text-transform: uppercase;
    font-weight: 800;
    letter-spacing: 2px;
    font-size: 0.8rem;
    display: block;
    margin-bottom: 15px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 50px;
}

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

.feature-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    border: 1px solid #e2e8f0;
    transition: var(--transition);
}

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

.feature-card .icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    margin-bottom: 15px;
}

/* WhatsApp Floating Button */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #25d366;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    box-shadow: 0 10px 25px rgba(37, 211, 102, 0.4);
    z-index: 999;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-flex {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .nav-links {
        display: none;
    }
}