/* ============================================
   ISP Website - Global Styles
   ============================================ */

/* CSS Variables */
:root {
    --primary: #0056b3;
    --primary-dark: #004494;
    --primary-light: #e3f2fd;
    --secondary: #00d2ff;
    --accent: #ff4757;
    --success: #2ecc71;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #1e272e;
    --dark-light: #2d3436;
    --gray: #636e72;
    --light: #f1f2f6;
    --light-gray: #dfe6e9;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-dark: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 100%);
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
    --shadow-sm: 0 2px 10px rgba(0,0,0,0.05);
    --shadow-lg: 0 20px 50px rgba(0,0,0,0.15);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', 'Hind Siliguri', sans-serif;
    color: var(--gray);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--dark);
    font-weight: 700;
    line-height: 1.3;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-accent { color: var(--accent); }
.text-success { color: var(--success); }
.text-white { color: var(--white); }
.text-center { text-align: center; }

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

.container-fluid {
    width: 100%;
    padding: 0 20px;
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    display: inline-block;
    transition: var(--transition);
    border: none;
    font-size: 16px;
    text-align: center;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0,86,179,0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,86,179,0.4);
}

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

.btn-secondary:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

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

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

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

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

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

.btn-lg {
    padding: 15px 40px;
    font-size: 18px;
}

/* Header & Navigation */
header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 32px;
    color: var(--secondary);
}

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

.nav-link {
    color: var(--dark);
    font-weight: 600;
    font-size: 16px;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--gradient);
    transition: var(--transition);
}

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

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    font-size: 24px;
    color: var(--dark);
    cursor: pointer;
}

/* Hero Section */
.hero {
    height: 90vh;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    display: flex;
    align-items: center;
    margin-top: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 10, 30, 0.85);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    color: var(--white);
    padding: 0 20px;
}

.hero h1 {
    color: var(--white);
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero h1 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* Page Header */
.page-header {
    background: var(--light);
    padding: 120px 0 60px;
    text-align: center;
}

.page-header h1 {
    color: var(--dark);
    font-size: 2.5rem;
    margin-bottom: 10px;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.section-header p {
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 30px;
    transition: var(--transition);
}

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

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

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

/* Service Cards */
.service-card {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border-bottom: 3px solid transparent;
}

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

.icon-box {
    width: 70px;
    height: 70px;
    background: rgba(0, 86, 179, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    color: var(--primary);
    transition: var(--transition);
}

.service-card:hover .icon-box {
    background: var(--gradient);
    color: var(--white);
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 15px;
}

/* Pricing Cards */
.pricing-card {
    background: var(--white);
    border: 1px solid var(--light-gray);
    border-radius: var(--radius);
    padding: 30px 20px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

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

.pricing-card.featured {
    border: 2px solid var(--primary);
    box-shadow: 0 10px 30px rgba(0,86,179,0.1);
}

.pricing-card.featured::before {
    content: 'BEST VALUE';
    position: absolute;
    top: 12px;
    right: -30px;
    background: var(--accent);
    color: var(--white);
    padding: 5px 30px;
    transform: rotate(45deg);
    font-size: 12px;
    font-weight: bold;
}

.speed-box {
    background: var(--light);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.speed-val {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1;
}

.speed-unit {
    font-size: 1rem;
    color: var(--gray);
    font-weight: 500;
}

.price-box {
    margin-bottom: 25px;
}

.price-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.price-amount span {
    font-size: 0.9rem;
    color: var(--gray);
    font-weight: 400;
}

.features-list {
    list-style: none;
    margin-bottom: 25px;
    text-align: left;
    font-size: 0.9rem;
}

.features-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--light);
    display: flex;
    align-items: center;
    color: var(--gray);
}

.features-list li i {
    color: var(--accent);
    margin-right: 8px;
    font-size: 12px;
}

.features-list li.check i {
    color: var(--success);
}

/* Stats Section */
.stats-section {
    padding: 80px 0;
    background: var(--dark);
    color: var(--white);
    text-align: center;
}

.stat-item h3 {
    font-size: 3rem;
    color: var(--secondary);
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 1.1rem;
    opacity: 0.8;
}

/* Footer */
footer {
    background: #0f1215;
    color: #a4b0be;
    padding: 70px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-about h3 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.footer-about p {
    line-height: 1.8;
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    gap: 10px;
}

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

.social-link:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.footer-links h4 {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #a4b0be;
}

.footer-links a:hover {
    color: var(--white);
}

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

.contact-info li i {
    color: var(--primary);
    margin-top: 5px;
}

.contact-info li a {
    color: #a4b0be;
}

.contact-info li a:hover {
    color: var(--white);
}

.copyright {
    border-top: 1px solid rgba(255,255,255,0.05);
    padding: 20px 0;
    text-align: center;
    font-size: 14px;
}

/* Breadcrumb */
.breadcrumb {
    padding: 20px 0;
    background: var(--light);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.breadcrumb-item a {
    color: var(--gray);
}

.breadcrumb-item a:hover {
    color: var(--primary);
}

.breadcrumb-item.active {
    color: var(--primary);
    font-weight: 600;
}

.breadcrumb-separator {
    color: var(--gray);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--light-gray);
    border-radius: 8px;
    font-family: inherit;
    font-size: 16px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,86,179,0.1);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 12px 20px;
    background: var(--light);
    color: var(--gray);
    font-weight: 500;
    font-size: 14px;
}

td {
    padding: 15px 20px;
    border-top: 1px solid var(--light-gray);
    font-size: 14px;
}

/* Badges & Pills */
.badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

/* Responsive */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .hero {
        height: 70vh;
    }
    
    .hero-btns {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
}

/* Utility Classes */
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mt-4 { margin-top: 40px; }
.mt-5 { margin-top: 50px; }

.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }
.mb-4 { margin-bottom: 40px; }
.mb-5 { margin-bottom: 50px; }

.pt-1 { padding-top: 10px; }
.pt-2 { padding-top: 20px; }
.pt-3 { padding-top: 30px; }
.pt-4 { padding-top: 40px; }
.pt-5 { padding-top: 50px; }

.pb-1 { padding-bottom: 10px; }
.pb-2 { padding-bottom: 20px; }
.pb-3 { padding-bottom: 30px; }
.pb-4 { padding-bottom: 40px; }
.pb-5 { padding-bottom: 50px; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 10px; }
.gap-2 { gap: 20px; }
.gap-3 { gap: 30px; }

.text-left { text-align: left; }
.text-right { text-align: right; }
.text-center { text-align: center; }

.bg-light { background: var(--light); }
.bg-white { background: var(--white); }
.bg-primary { background: var(--primary); }
.bg-dark { background: var(--dark); }