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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(0, 0, 0, 0.15);
}

.navbar.hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.5rem;
    color: #667eea;
}

.logo-icon {
    font-size: 1.8rem;
    margin-right: 0.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #667eea;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 50%;
    background: #667eea;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        border-top: 1px solid rgba(0, 0, 0, 0.1);
        padding: 2rem 0;
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 1rem 0;
    }

    .nav-link {
        font-size: 1.1rem;
        padding: 1rem;
        display: block;
        border-radius: 8px;
        margin: 0 2rem;
        transition: all 0.3s ease;
    }

    .nav-link:hover {
        background: rgba(102, 126, 234, 0.1);
        color: #667eea;
    }

    .nav-link::after {
        display: none;
    }

    /* Mobile portfolio styles */
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .filter-buttons {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }

    .portfolio-image {
        height: 200px;
    }

    .portfolio-overlay {
        padding: 1.5rem;
    }

    .portfolio-info h3 {
        font-size: 1.25rem;
    }

    .portfolio-info p {
        font-size: 0.875rem;
    }

    .tech-tag {
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
    }

    .action-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }

    /* Mobile hero styles */
    .hero-container {
        padding: 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-features {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    /* Mobile services styles */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .service-card {
        padding: 2rem 1.5rem;
    }

    /* Mobile about styles */
    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    /* Mobile contact styles */
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-form {
        padding: 2rem 1.5rem;
    }
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    color: white;
    padding-top: 70px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    font-weight: 600;
    letter-spacing: 2px;
    animation: fadeInDown 0.8s ease-out;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    opacity: 0.95;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* Newsletter Signup */
.newsletter-signup {
    max-width: 500px;
    margin: 0 auto 4rem;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.newsletter-signup h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.newsletter-form {
    position: relative;
}

.input-group {
    display: flex;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 0.5rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.input-group input {
    flex: 1;
    background: none;
    border: none;
    padding: 1rem;
    color: white;
    font-size: 1rem;
    outline: none;
}

.input-group input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.submit-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.submit-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.newsletter-privacy {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.9rem;
    opacity: 0.8;
}

.newsletter-success {
    display: none;
    background: rgba(34, 197, 94, 0.2);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 12px;
    padding: 1rem;
    margin-top: 1rem;
    backdrop-filter: blur(10px);
    color: #22c55e;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.newsletter-error {
    display: none;
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 12px;
    padding: 1rem;
    margin-top: 1rem;
    backdrop-filter: blur(10px);
    color: #ef4444;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.newsletter-success.show,
.newsletter-error.show {
    display: flex;
    animation: slideInUp 0.5s ease-out;
}

/* Hero Features */
.hero-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
    animation: fadeInUp 0.8s ease-out 0.8s both;
    width: 100%;
}

.feature-item {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 2rem 1.5rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    width: 100%;
}

.feature-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    flex-shrink: 0;
}

.feature-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 100%;
}

.feature-content h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    line-height: 1.3;
    color: white;
}

.feature-content p {
    opacity: 0.9;
    line-height: 1.5;
    font-size: 0.95rem;
    word-wrap: break-word;
    hyphens: auto;
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
}

/* Services Section */
.services {
    padding: 6rem 0;
    background: #f8fafc;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1e293b;
}

.section-header p {
    font-size: 1.25rem;
    color: #64748b;
    max-width: 600px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.service-card p {
    color: #64748b;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 0.5rem 0;
    color: #64748b;
    position: relative;
    padding-left: 1.5rem;
}

.service-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

/* Portfolio Section */
.filter-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.filter-btn {
    background: white;
    border: 2px solid #e2e8f0;
    color: #64748b;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
}

.filter-btn:hover {
    border-color: #667eea;
    color: #667eea;
    transform: translateY(-2px);
}

.filter-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: #667eea;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.portfolio-item {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
    opacity: 1;
    transform: scale(1);
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

.portfolio-image {
    position: relative;
    height: 250px;
    background: #f8fafc;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.portfolio-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: #94a3b8;
    font-size: 0.875rem;
}

.portfolio-placeholder i {
    font-size: 2rem;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: all 0.3s ease;
    padding: 2rem;
    text-align: center;
}

.portfolio-image:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.portfolio-info p {
    margin-bottom: 1rem;
    opacity: 0.9;
    line-height: 1.5;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.tech-tag {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.portfolio-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.action-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* About Section */
.about {
    padding: 6rem 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1e293b;
}

.about-lead {
    font-size: 1.25rem;
    color: #667eea;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.about-text p {
    color: #64748b;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #64748b;
    font-weight: 500;
}

.about-visual {
    position: relative;
}

.visual-element {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: float 6s ease-in-out infinite;
}

.floating-card:nth-child(1) {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.floating-card:nth-child(2) {
    top: 50%;
    right: 10%;
    animation-delay: 2s;
}

.floating-card:nth-child(3) {
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

/* Contact Section */
.contact {
    padding: 6rem 0;
    background: #f8fafc;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.contact-item h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: #1e293b;
}

.contact-item p {
    color: #64748b;
}

/* Portfolio Section */
.portfolio {
    padding: 6rem 0;
    background: white;
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-radius: 50px;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    color: #64748b;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-color: #667eea;
    transform: translateY(-2px);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.portfolio-item {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    background: white;
    border: 1px solid #e2e8f0;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.15);
}

.portfolio-image {
    position: relative;
    height: 250px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.portfolio-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: #94a3b8;
    font-size: 1.1rem;
    font-weight: 500;
}

.portfolio-placeholder i {
    width: 60px;
    height: 60px;
    stroke-width: 1.5;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.95), rgba(118, 75, 162, 0.95));
    color: white;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    opacity: 0;
    transition: all 0.3s ease;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.portfolio-info p {
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tech-tag {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.portfolio-actions {
    display: flex;
    gap: 1rem;
}

.action-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Technology Stack Section */
.tech-stack {
    padding: 6rem 0;
    background: #f8fafc;
}

.tech-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.tech-category {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.tech-category h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: #1e293b;
}

.tech-category h3 i {
    color: #667eea;
}

.tech-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.tech-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.tech-item span {
    font-weight: 500;
    color: #334155;
    min-width: 100px;
}

.skill-bar {
    flex: 1;
    height: 8px;
    background: #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.skill-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 10px;
    width: 0%;
    transition: width 2s ease-in-out;
    position: relative;
}

.skill-fill::after {
    content: attr(data-skill) '%';
    position: absolute;
    right: 0.5rem;
    top: -30px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #667eea;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tech-item:hover .skill-fill::after {
    opacity: 1;
}

/* Portfolio Filtering */
.portfolio-item.hidden {
    display: none;
}

.contact-form {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.form-group {
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.contact-form .submit-btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
}

.contact-form .submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

/* Contact Form Messages */
.form-success,
.form-error {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    animation: slideInUp 0.5s ease-out;
}

.form-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #22c55e;
}

.form-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.form-success i,
.form-error i {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Footer */
.footer {
    background: #1e293b;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-brand p {
    opacity: 0.8;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #667eea;
    transform: translateY(-2px);
}

.footer-links {
    display: flex;
    gap: 3rem;
}

.footer-column h4 {
    font-weight: 600;
    margin-bottom: 1rem;
}

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

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    opacity: 0.8;
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        gap: 1rem;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-features {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: 3rem;
    }
    
    .feature-item {
        padding: 1.5rem;
        text-align: center;
    }
    
    .feature-content h4 {
        font-size: 1.1rem;
        margin-bottom: 0.75rem;
    }
    
    .feature-content p {
        font-size: 0.9rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-links {
        gap: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .form-group {
        flex-direction: column;
        gap: 1rem;
    }
    
    .input-group {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .submit-btn {
        justify-content: center;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .portfolio-item {
        margin: 0 1rem;
    }
    
    .filter-buttons {
        gap: 0.5rem;
        margin-bottom: 2rem;
    }
    
    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    
    .tech-categories {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .tech-category {
        padding: 2rem;
    }
    
    .tech-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .tech-item span {
        min-width: auto;
        width: 100%;
    }
    
    .skill-bar {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .hero-container {
        padding: 0 1rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .about-text h2 {
        font-size: 2rem;
    }
    
    .floating-card {
        position: static;
        margin: 1rem 0;
        animation: none;
    }
}

/* Live Demo Section */
.live-demo {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
}

.live-demo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23667eea" fill-opacity="0.03"><path d="m36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    pointer-events: none;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.demo-card {
    background: #fff;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.demo-card.featured {
    border: 2px solid #667eea;
    transform: scale(1.02);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.15);
}

.demo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.demo-card.featured:hover {
    transform: scale(1.02) translateY(-5px);
}

.demo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.demo-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.demo-badge {
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.demo-badge.live {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    animation: pulse 2s infinite;
}

.demo-badge.coming-soon {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.demo-content h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 0.8rem;
}

.demo-content p {
    color: #64748b;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.demo-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.feature-tag {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 2rem;
}

.tech-tag {
    background: #f1f5f9;
    color: #475569;
    padding: 0.3rem 0.6rem;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 500;
}

.demo-actions {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.demo-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 0.875rem;
}

.demo-btn.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.demo-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.demo-btn.secondary {
    background: white;
    color: #667eea;
    border-color: #667eea;
}

.demo-btn.secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.demo-btn.disabled {
    background: #f8fafc;
    color: #94a3b8;
    cursor: not-allowed;
    border-color: #e2e8f0;
}

.demo-btn.disabled:hover {
    transform: none;
}

.demo-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 4rem;
}

.info-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.info-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #667eea20 0%, #764ba220 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.info-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.info-content p {
    color: #64748b;
    line-height: 1.6;
    font-size: 0.9rem;
}

/* Responsive Design for Demo Section */
@media (max-width: 768px) {
    .demo-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .demo-card {
        padding: 1.5rem;
    }
    
    .demo-card.featured {
        transform: none;
    }
    
    .demo-card.featured:hover {
        transform: translateY(-5px);
    }
    
    .demo-actions {
        flex-direction: column;
    }
    
    .demo-btn {
        justify-content: center;
    }
    
    .demo-info {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .info-card {
        padding: 1.5rem;
    }
}