/* ==========================================
   Portfolio Website - Custom Styles
   Author: Chhotu Verma
   ========================================== */

/* ==========================================
   CSS Variables
   ========================================== */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --dark-color: #212529;
    --light-color: #f8f9fa;
    --text-color: #333;
    --text-light: #666;
    --transition: all 0.3s ease;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
}

/* ==========================================
   Global Styles
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    line-height: 1.2;
}

/* ==========================================
   Navigation Bar
   ========================================== */
.navbar {
    background-color: var(--dark-color) !important;
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff !important;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    font-weight: 500;
    margin: 0 0.5rem;
    transition: var(--transition);
    position: relative;
}

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

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    width: 80%;
}

/* Navbar scroll effect */
.navbar.scrolled {
    padding: 0.5rem 0;
    box-shadow: var(--shadow-lg);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

/* Animated background effect */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-section h1 {
    color: #fff;
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.hero-section .text-primary {
    color: #ffd700 !important;
}

.hero-section h2 {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
}

.hero-section .lead {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.25rem;
}

/* Hero buttons */
.hero-buttons .btn {
    padding: 0.75rem 2rem;
    font-weight: 500;
    border-radius: 50px;
    transition: var(--transition);
}

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

.hero-buttons .btn-primary:hover {
    background-color: transparent;
    border-color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.hero-buttons .btn-outline-light:hover {
    background-color: #fff;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-down {
    color: rgba(255, 255, 255, 0.8);
    font-size: 2rem;
    animation: bounce 2s infinite;
    text-decoration: none;
    transition: var(--transition);
}

.scroll-down:hover {
    color: #fff;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* ==========================================
   Animation Classes
   ========================================== */
.animate-fade-in {
    animation: fadeIn 1s ease-in;
}

.animate-fade-in-delay-1 {
    animation: fadeIn 1s ease-in 0.3s both;
}

.animate-fade-in-delay-2 {
    animation: fadeIn 1s ease-in 0.6s both;
}

.animate-fade-in-delay-3 {
    animation: fadeIn 1s ease-in 0.9s both;
}

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

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), #764ba2);
    border-radius: 2px;
}

/* ==========================================
   About Section
   ========================================== */
.about-content {
    font-size: 1.1rem;
    color: var(--text-light);
}

.about-content .lead {
    font-size: 1.25rem;
    color: var(--text-color);
}

.about-info {
    margin-top: 2rem;
}

.about-info p {
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.profile-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    object-fit: cover;
    transition: var(--transition);
    animation: float 3s ease-in-out infinite;
}

.profile-image:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* ==========================================
   Skills Section
   ========================================== */
.skill-card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
}

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

.skill-icon {
    margin-bottom: 1rem;
}

.skill-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.skill-description {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================
   Experience Section
   ========================================== */
.experience-card {
    background: #fff;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-color);
}

.experience-header {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid #e9ecef;
}

.experience-logo {
    flex-shrink: 0;
}

.experience-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.experience-company {
    font-size: 1.25rem;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.experience-duration {
    color: var(--text-light);
    font-size: 1rem;
}

.experience-list {
    list-style: none;
    padding: 0;
}

.experience-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-light);
    font-size: 1.05rem;
    line-height: 1.8;
}

.experience-list li i {
    position: absolute;
    left: 0;
    top: 1rem;
}

/* ==========================================
   Projects Section
   ========================================== */
.project-card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    display: flex;
    flex-direction: column;
}

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

.project-icon {
    text-align: center;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 1rem;
    text-align: center;
}

.project-description {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.project-tech .badge {
    padding: 0.5rem 1rem;
    font-weight: 500;
    font-size: 0.85rem;
}

.project-card .btn {
    margin-top: auto;
    width: 100%;
}

/* ==========================================
   Hire Me Section
   ========================================== */
.service-card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e9ecef;
    height: 100%;
}

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

.service-icon {
    margin-bottom: 1rem;
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.service-description {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

.feature-item {
    padding: 1.5rem;
    background: #fff;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    height: 100%;
}

.feature-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.feature-item h5 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.feature-item p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* ==========================================
   Resume Section
   ========================================== */
.resume-card {
    background: #fff;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.resume-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.resume-icon {
    animation: float 3s ease-in-out infinite;
}

.resume-card h4 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.resume-card .btn {
    padding: 0.75rem 2rem;
    font-weight: 500;
    border-radius: 50px;
    transition: var(--transition);
}

.resume-card .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==========================================
   WhatsApp Contact Section
   ========================================== */
.whatsapp-card {
    background: #fff;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    max-width: 600px;
    margin: 0 auto;
}

.whatsapp-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.whatsapp-icon {
    animation: float 3s ease-in-out infinite;
}

.whatsapp-card h4 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.whatsapp-card .btn-success {
    background-color: #25D366;
    border-color: #25D366;
    padding: 0.75rem 2rem;
    font-weight: 500;
    border-radius: 50px;
    transition: var(--transition);
}

.whatsapp-card .btn-success:hover {
    background-color: #20BA5A;
    border-color: #20BA5A;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.whatsapp-card .text-success {
    color: #25D366 !important;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact-info {
    padding: 2rem;
}

.contact-info i {
    margin-bottom: 1rem;
}

.contact-info h5 {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.contact-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.contact-link:hover {
    color: #764ba2;
    text-decoration: underline;
}

.contact-form {
    background: #fff;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
}

.contact-form .form-label {
    font-weight: 500;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.contact-form .form-control {
    border: 1px solid #dee2e6;
    border-radius: 5px;
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.contact-form .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.social-links {
    margin-top: 2rem;
}

.social-link {
    color: var(--primary-color);
    transition: var(--transition);
    display: inline-block;
}

.social-link:hover {
    color: #764ba2;
    transform: translateY(-5px);
}

/* ==========================================
   Footer
   ========================================== */
footer {
    background-color: var(--dark-color) !important;
    color: rgba(255, 255, 255, 0.8);
}

.footer-social-link {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.25rem;
    transition: var(--transition);
    text-decoration: none;
}

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

/* ==========================================
   Responsive Design
   ========================================== */

/* Large devices (desktops, 992px and up) */
@media (max-width: 991.98px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .experience-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

/* Medium devices (tablets, 768px and up) */
@media (max-width: 767.98px) {
    .hero-section {
        padding-top: 100px;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .hero-section h2 {
        font-size: 1.25rem;
    }
    
    .hero-section .lead {
        font-size: 1rem;
    }
    
    .hero-buttons .btn {
        display: block;
        width: 100%;
        margin-bottom: 1rem;
    }
    
    .hero-buttons .btn.me-3 {
        margin-right: 0 !important;
    }
    
    section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .skill-card,
    .project-card {
        margin-bottom: 1.5rem;
    }
    
    .experience-card {
        padding: 1.5rem;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
    
    .about-content {
        font-size: 1rem;
    }
    
    .service-card,
    .feature-item {
        margin-bottom: 1.5rem;
    }
    
    .resume-card {
        padding: 2rem;
    }
}

/* Small devices (landscape phones, 576px and up) */
@media (max-width: 575.98px) {
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .hero-section h1 {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .experience-title {
        font-size: 1.5rem;
    }
    
    .experience-company {
        font-size: 1.1rem;
    }
    
    .project-title {
        font-size: 1.25rem;
    }
}

/* ==========================================
   Utility Classes
   ========================================== */
.bg-light {
    background-color: var(--light-color) !important;
}

.text-primary {
    color: var(--primary-color) !important;
}

/* Smooth scroll behavior for older browsers */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

/* Print styles */
@media print {
    .navbar,
    .hero-buttons,
    .contact-form,
    footer {
        display: none;
    }
    
    section {
        page-break-inside: avoid;
    }
}