/* ===================================
   PROFESSIONAL PM PORTFOLIO
   Modern, Clean, Corporate Design
   =================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #1a202c;
    background: #ffffff;
    font-weight: 400;
    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(20px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.03);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.nav-logo:hover .logo-icon {
    transform: rotate(-5deg) scale(1.05);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 1rem;
    font-weight: 700;
    color: #1a202c;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: #718096;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    text-decoration: none;
    color: #4a5568;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.language-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.language-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: #1a202c;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 3px;
}

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

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    bottom: -150px;
    left: -100px;
    animation-delay: -7s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(50px, -50px) scale(1.1);
    }
    50% {
        transform: translate(-30px, 30px) scale(0.9);
    }
    75% {
        transform: translate(40px, 50px) scale(1.05);
    }
}

.hero-container {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-label {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 50px;
    color: #667eea;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 2rem;
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: #1a202c;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: #4a5568;
    margin-bottom: 3rem;
    line-height: 1.8;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.9rem;
    color: #718096;
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(0, 0, 0, 0.1);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-3px);
}

/* Section Styles */
section {
    padding: 100px 0;
}

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

.section-label {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #1a202c;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.1rem;
    color: #718096;
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about {
    background: #f7fafc;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.about-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.about-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 1rem;
}

.about-card p {
    color: #718096;
    line-height: 1.8;
}

.expertise-section {
    text-align: center;
    padding: 3rem;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.expertise-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 2rem;
}

.expertise-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.tag {
    padding: 0.75rem 1.5rem;
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

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

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

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 50px;
    color: #4a5568;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.filter-btn:hover,
.filter-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

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

.project-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    border-color: rgba(102, 126, 234, 0.2);
}

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

.project-badges {
    display: flex;
    gap: 0.5rem;
}

.badge {
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-builder {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
}

.badge-leader {
    background: rgba(245, 101, 101, 0.1);
    color: #f56565;
}

.badge-creator {
    background: rgba(237, 137, 54, 0.1);
    color: #ed8936;
}

.project-year {
    color: #a0aec0;
    font-weight: 600;
    font-size: 0.9rem;
}

.project-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.project-description {
    color: #718096;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.project-highlights,
.project-details {
    margin-bottom: 1.5rem;
}

.highlight-item,
.detail-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.highlight-item i {
    color: #667eea;
    margin-top: 0.25rem;
}

.detail-item {
    flex-direction: column;
    gap: 0.25rem;
}

.detail-item strong {
    color: #1a202c;
    font-weight: 700;
}

.detail-item span {
    color: #718096;
    font-size: 0.9rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag-sm {
    padding: 0.4rem 0.9rem;
    background: #f7fafc;
    color: #4a5568;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid #e2e8f0;
}

.project-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(102, 126, 234, 0.05);
    color: #667eea;
    border-radius: 10px;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.project-link:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* Skills Section */
.skills {
    background: #f7fafc;
}

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

.skill-group {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.skill-group-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.skill-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.3rem;
}

.skill-group-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #1a202c;
}

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

.skill-list li {
    margin-bottom: 1.5rem;
}

.skill-name {
    display: block;
    color: #4a5568;
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.skill-bar {
    width: 100%;
    height: 8px;
    background: #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    transition: width 1s ease;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.contact-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    border-color: rgba(102, 126, 234, 0.2);
}

.contact-icon-wrapper {
    width: 60px;
    height: 60px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
    font-size: 1.5rem;
}

.contact-icon-wrapper.linkedin {
    background: rgba(0, 119, 181, 0.1);
    color: #0077b5;
}

.contact-info {
    flex: 1;
}

.contact-info h4 {
    font-size: 1rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 0.25rem;
}

.contact-info p {
    color: #718096;
    font-size: 0.95rem;
}

.contact-arrow {
    color: #cbd5e0;
    transition: all 0.3s ease;
}

.contact-item:hover .contact-arrow {
    color: #667eea;
    transform: translateX(5px);
}

/* Footer */
.footer {
    background: #1a202c;
    padding: 3rem 0;
    color: white;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.footer-logo .logo-icon {
    width: 40px;
    height: 40px;
}

.footer-logo span {
    font-weight: 700;
    font-size: 1.1rem;
}

.footer-left p {
    color: #a0aec0;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: #a0aec0;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Hidden Class */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .stat-divider {
        width: 100px;
        height: 1px;
    }
    
    .experience-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        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-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .about-grid,
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    section {
        padding: 60px 0;
    }
}