/* CSS Variables & Reset */
:root {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: #eff6ff;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Plus Jakarta Sans', sans-serif;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* Common Layout Utilities */
.section-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--accent-color);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.btn-outline {
    background-color: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}

.btn-outline:hover {
    background-color: var(--accent-light);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.full-width {
    width: 100%;
}

/* A. Navbar Styling */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(248, 250, 252, 0.85);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

header.scrolled {
    box-shadow: var(--shadow);
    background-color: rgba(255, 255, 255, 0.95);
}

.navbar {
    max-width: 1140px;
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-logo span {
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent-color);
    transition: var(--transition);
}

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

.hamburger {
    display: none;
    cursor: pointer;
}

.hamburger .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-primary);
    transition: var(--transition);
}

/* B. Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    background: linear-gradient(135deg, #f8fafc 0%, #eff6ff 100%);
}

.hero-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
}

.hero-greeting {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-color);
    display: inline-block;
    margin-bottom: 8px;
}

.hero-name {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 12px;
}

.hero-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.hero-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 540px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 35px;
}

.hero-socials {
    display: flex;
    gap: 16px;
}

.hero-socials a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--card-bg);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.hero-socials a:hover {
    background-color: var(--accent-color);
    color: #ffffff;
    transform: translateY(-3px);
}

.hero-image-wrapper {
    position: relative;
    width: 320px;
    height: 320px;
    margin: 0 auto;
    animation: floatAnimation 4s ease-in-out infinite;
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    box-shadow: var(--shadow-lg);
    border: 4px solid #ffffff;
    transition: var(--transition);
}

@keyframes floatAnimation {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* C. About Me Section */
.about-section {
    padding: 100px 0;
    background-color: var(--card-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.about-image-card {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 4px solid var(--bg-color);
}

.about-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-text h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.about-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 30px;
}

.detail-item {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.detail-item strong {
    color: var(--text-primary);
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-card {
    background-color: var(--bg-color);
    padding: 20px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-number {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* D. Skills / What I've Learned Section */
.skills-section {
    padding: 100px 0;
    background-color: var(--bg-color);
}

.carousel-container {
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 20px 0;
}

.carousel-track-wrapper {
    overflow: hidden;
    width: 100%;
}

.carousel-track {
    display: flex;
    gap: 24px;
    transition: transform 0.4s ease-in-out;
}

.skill-card {
    flex: 0 0 calc(33.333% - 16px);
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-color);
}

.skill-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.skill-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.skill-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.carousel-btn {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    position: absolute;
    z-index: 10;
    transition: var(--transition);
    color: var(--text-primary);
}

.carousel-btn:hover {
    background-color: var(--accent-color);
    color: #ffffff;
    border-color: var(--accent-color);
}

.prev-btn { left: -10px; }
.next-btn { right: -10px; }

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background-color: var(--accent-color);
    width: 24px;
    border-radius: 5px;
}

/* E. Projects Section */
.projects-section {
    padding: 100px 0;
    background-color: var(--card-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.project-card {
    background-color: var(--bg-color);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.project-img-wrapper {
    overflow: hidden;
    height: 220px;
}

.project-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-img-wrapper img {
    transform: scale(1.05);
}

.project-info {
    padding: 24px;
}

.project-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.project-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.project-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.project-tags span {
    font-size: 0.75rem;
    background-color: var(--accent-light);
    color: var(--accent-color);
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 600;
}

.project-links {
    display: flex;
    gap: 12px;
}

/* F. Certificates Section */
.certificates-section {
    padding: 100px 0;
    background-color: var(--bg-color);
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.cert-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.cert-img-wrapper {
    height: 180px;
    overflow: hidden;
    background-color: #e2e8f0;
}

.cert-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.cert-card:hover .cert-img-wrapper img {
    transform: scale(1.03);
}

.cert-info {
    padding: 20px;
}

.cert-info h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.cert-org {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.cert-year {
    display: block;
    font-size: 0.75rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 16px;
}

/* Modal Lightbox */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(5px);
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal.active {
    display: flex;
}

.modal-content-wrapper {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    max-width: 700px;
    width: 100%;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    animation: scaleUp 0.3s ease;
}

@keyframes scaleUp {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal-content-wrapper img {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    background-color: #000;
}

.modal-caption {
    padding: 20px;
}

.modal-caption h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.modal-caption p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 2.5rem;
    color: #ffffff;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--accent-color);
}

/* G. Contact Section */
.contact-section {
    padding: 100px 0;
    background-color: var(--card-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
}

.contact-info-box {
    background-color: var(--bg-color);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.contact-info-box h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.contact-info-box p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 30px;
}

.contact-detail-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.contact-item i {
    width: 40px;
    height: 40px;
    background-color: var(--accent-light);
    color: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.contact-form {
    background-color: var(--bg-color);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--card-bg);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-notification {
    margin-top: 16px;
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
}

.form-notification.success {
    color: #16a34a;
}

.form-notification.error {
    color: #dc2626;
}

/* H. Footer */
footer {
    background-color: #0f172a;
    color: #ffffff;
    padding: 40px 0;
}

.footer-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-container p {
    font-size: 0.9rem;
    color: #94a3b8;
}

.footer-socials {
    display: flex;
    gap: 16px;
}

.footer-socials a {
    color: #94a3b8;
    font-size: 1.1rem;
    transition: var(--transition);
}

.footer-socials a:hover {
    color: #ffffff;
}

/* Scroll Animations */
.animate-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-fade-in.appear {
    opacity: 1;
    transform: translateY(0);
}

.animate-slide-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-slide-up.appear {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Media Queries */
@keyframes fadeInMobile {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
        padding-top: 40px;
    }
    .hero-buttons {
        justify-content: center;
    }
    .hero-socials {
        justify-content: center;
    }
    .about-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .skill-card {
        flex: 0 0 calc(50% - 12px);
    }
    .certificates-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: block;
    }
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--card-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s ease;
        box-shadow: var(--shadow);
        padding: 30px 0;
        gap: 20px;
    }
    .nav-menu.active {
        left: 0;
    }
    .hero-name {
        font-size: 2.25rem;
    }
    .skill-card {
        flex: 0 0 100%;
    }
    .projects-grid, .certificates-grid {
        grid-template-columns: 1fr;
    }
    .footer-container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}