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

:root {
    /* Professional Portfolio Color Scheme - Based on Best Practices */
    /* Primary: Deep Teal (Trust, Technology, Professional) */
    --primary-color: #0891b2;
    --primary-dark: #0e7490;
    --primary-light: #06b6d4;
    /* Secondary: Warm Coral (Energy, Creativity) */
    --secondary-color: #f97316;
    --accent-color: #14b8a6;
    --accent-hover: #0d9488;
    --success-color: #10b981;
    /* Neutrals */
    --text-dark: #1e293b;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --bg-input: #f1f5f9;
    --border-color: #e2e8f0;
    /* Gradients */
    --gradient-1: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
    --gradient-2: linear-gradient(135deg, #06b6d4 0%, #14b8a6 100%);
    --gradient-3: linear-gradient(135deg, #0e7490 0%, #0891b2 100%);
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 1rem 0;
}

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

.nav-brand {
    font-size: 1.75rem;
    font-weight: 400;
}

.signature-logo {
    font-family: 'Kalam', cursive;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 400;
    letter-spacing: 0.3px;
    font-size: 1.875rem;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: all 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    z-index: 2;
    position: relative;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-badges {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.badge {
    padding: 0.5rem 1.25rem;
    background: var(--bg-light);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    border: 2px solid var(--border-color);
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* Hero Shapes */
.hero-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    animation: float 20s infinite;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--gradient-1);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--gradient-2);
    bottom: -50px;
    left: -50px;
    animation-delay: 5s;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--gradient-3);
    top: 50%;
    left: 10%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(30px, -30px) rotate(120deg);
    }
    66% {
        transform: translate(-20px, 20px) rotate(240deg);
    }
}

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

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

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about {
    background: var(--bg-light);
}

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

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    font-size: 1.125rem;
}

.stats {
    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;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.about-skills h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg-white);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.skill-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.skill-icon {
    font-size: 1.75rem;
    color: var(--primary-color);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Services Section */
.services {
    background: var(--bg-light);
}
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(8, 145, 178, 0.1);
    border-radius: 12px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.service-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

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

.service-list li {
    padding: 0.5rem 0;
    color: var(--text-light);
    position: relative;
    padding-left: 1.5rem;
}

.service-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

/* Portfolio Section */
.portfolio {
    background: var(--bg-white);
}

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

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-weight: 500;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.875rem;
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.filter-btn.active {
    background: var(--gradient-1);
    border-color: transparent;
    color: white;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.portfolio-item.hidden {
    display: none;
}

.portfolio-item {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

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

.portfolio-image {
    position: relative;
    height: 250px;
    overflow: hidden;
    background: var(--bg-light);
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.1);
}

.portfolio-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 500;
    background: var(--bg-light);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

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

.portfolio-link {
    padding: 0.75rem 1.5rem;
    background: var(--bg-white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s;
}

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

.portfolio-info {
    padding: 1.5rem;
}

.portfolio-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.portfolio-info p {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.portfolio-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.portfolio-tags span {
    padding: 0.25rem 0.75rem;
    background: var(--bg-light);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--primary-color);
    font-weight: 500;
}

.load-more-container {
    text-align: center;
    margin-top: 2rem;
}

/* Technologies & Tools Section */
.technologies-section {
    background: var(--bg-white);
}

.technologies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
    max-width: 1000px;
    margin: 0 auto;
}

.skill-tag {
    padding: 0.875rem 1.25rem;
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    white-space: nowrap;
    box-shadow: var(--shadow-sm);
}

.skill-tag:hover {
    background: var(--gradient-1);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* Experience Section */
.experience {
    background: var(--bg-light);
}

.experience-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 80px;
    margin-bottom: 3rem;
}

.timeline-marker {
    position: absolute;
    left: 20px;
    top: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--gradient-1);
    border: 4px solid var(--bg-white);
    box-shadow: var(--shadow-md);
}

.timeline-content {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.timeline-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.timeline-date {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-light);
    border-radius: 4px;
    font-size: 0.875rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.timeline-content p {
    color: var(--text-light);
}

/* Contact Section */
.contact {
    background: var(--bg-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-icon {
    font-size: 1.75rem;
    color: var(--primary-color);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(8, 145, 178, 0.1);
    border-radius: 10px;
    flex-shrink: 0;
}

.contact-item h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-item a,
.contact-item p {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s;
}

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

.contact-form {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-dark);
    transition: all 0.3s;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
    background: var(--bg-white);
}

.form-group textarea {
    resize: vertical;
}

/* Footer */
.footer {
    background: #e2e8f0;
    color: var(--text-dark);
    padding: 1.5rem 0;
    text-align: center;
}

.footer-content p {
    margin: 0;
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-content {
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        z-index: 999;
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: clamp(2rem, 5vw, 3rem);
    }

    .hero-subtitle {
        font-size: 1rem;
        line-height: 1.5;
    }

    .hero-badges {
        gap: 0.5rem;
    }

    .badge {
        font-size: 0.75rem;
        padding: 0.4rem 1rem;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .stat-number {
        font-size: 2rem;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .technologies-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 0.75rem;
    }

    .skill-tag {
        font-size: 0.8125rem;
        padding: 0.75rem 1rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-filters {
        gap: 0.5rem;
    }

    .filter-btn {
        font-size: 0.8125rem;
        padding: 0.625rem 1.25rem;
    }

    .experience-timeline::before {
        left: 15px;
    }

    .timeline-item {
        padding-left: 50px;
    }

    .timeline-marker {
        left: 5px;
    }

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

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 80px 0 40px;
    }

    .hero-title {
        font-size: 1.75rem;
        line-height: 1.3;
    }

    .hero-subtitle {
        font-size: 0.9375rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section-subtitle {
        font-size: 0.9375rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }

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

    .service-card {
        padding: 1.5rem;
    }

    .portfolio-item {
        margin-bottom: 1rem;
    }

    .technologies-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 0.5rem;
    }

    .skill-tag {
        font-size: 0.75rem;
        padding: 0.625rem 0.875rem;
    }

    .contact-form {
        padding: 1.5rem;
    }

    .timeline-content {
        padding: 1.5rem;
    }
}

@media (max-width: 360px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .nav-brand {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 1.25rem;
    }
}