/**
 * Pankaj Sharma Telecom - Main Stylesheet Part 1
 * CSS Variables, Reset, Typography, Layout
 */

:root {
    --primary: #1e3a5f;
    --primary-dark: #152a45;
    --primary-light: #2a4d7a;
    --accent: #2980b9;
    --accent-light: #3498db;
    --accent-dark: #1f6391;
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --gray: #e9ecef;
    --medium-gray: #6c757d;
    --dark-gray: #495057;
    --dark: #2c3e50;
    --black: #1a1a2e;
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
    --info: #17a2b8;
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    --gradient-hero: linear-gradient(135deg, rgba(30, 58, 95, 0.95) 0%, rgba(41, 128, 185, 0.9) 100%);
    --gradient-dark: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 50%;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.15);
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --container-max: 1200px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--dark);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: var(--accent-dark);
}

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

ul,
ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--primary);
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.75rem;
}

h2 {
    font-size: 2.25rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.375rem;
}

p {
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.lead {
    font-size: 1.25rem;
    color: var(--medium-gray);
    line-height: 1.7;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1rem;
}

.section {
    padding: 4rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 2rem;
}

.section-header .section-label {
    display: inline-block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    max-width: 600px;
    margin: 0 auto;
}

.bg-light {
    background: var(--light-gray);
}

.bg-dark {
    background: var(--gradient-dark);
    color: var(--white);
}

.bg-dark h2,
.bg-dark h3 {
    color: var(--white);
}

.bg-dark p {
    color: rgba(255, 255, 255, 0.8);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

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

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

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

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

.btn-outline-white {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

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

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.top-bar {
    background: var(--primary-dark);
    padding: 0.5rem 0;
    font-size: 0.875rem;
}

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

.top-bar-left,
.top-bar-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.top-bar a {
    color: rgba(255, 255, 255, 0.85);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.top-bar i {
    font-size: 0.75rem;
}

.main-header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.main-header.scrolled {
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo img {
    height: 45px;
}

.logo-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
}

.logo-name {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-menu>li>a {
    display: block;
    padding: 0.75rem 0.75rem;
    color: var(--dark);
    font-weight: 500;
    position: relative;
}

.nav-menu>li>a:hover,
.nav-menu>li>a.active {
    color: var(--accent);
}

.nav-menu>li>a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1rem;
    right: 1rem;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
}

.has-dropdown {
    position: relative;
}

.has-dropdown>a i {
    font-size: 0.65rem;
    margin-left: 0.25rem;
    transition: transform var(--transition-fast);
}

.has-dropdown:hover>a i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
    padding: 0.5rem 0;
    z-index: 100;
}

.has-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    color: var(--dark);
    font-weight: 500;
}

.dropdown-menu li a:hover {
    background: var(--light-gray);
    color: var(--accent);
}

.dropdown-menu li a i {
    width: 20px;
    color: var(--accent);
}

.nav-cta {
    margin-left: 1rem;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--primary);
    transition: all var(--transition-base);
}