:root {
    --primary-light: #e3f2fd;
    --primary: #64b5f6;
    --primary-medium: #42a5f5;
    --primary-dark: #1e88e5;
    --primary-darker: #1565c0;
    --white: #ffffff;
    --off-white: #f8fafc;
    --gray-light: #e2e8f0;
    --gray: #94a3b8;
    --gray-dark: #64748b;
    --text-dark: #1e293b;
    --text-medium: #475569;
    --shadow-soft: 0 4px 20px rgba(100, 181, 246, 0.15);
    --shadow-medium: 0 8px 30px rgba(100, 181, 246, 0.2);
    --shadow-strong: 0 15px 50px rgba(100, 181, 246, 0.25);
    --gradient-primary: linear-gradient(135deg, #64b5f6 0%, #42a5f5 50%, #1e88e5 100%);
    --gradient-light: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    --gradient-hero: linear-gradient(180deg, #e3f2fd 0%, #ffffff 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--white);
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--primary-light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    padding: 0.7rem 5%;
    box-shadow: var(--shadow-soft);
}

.logo {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-medium);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-dark);
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 5% 80px;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(100, 181, 246, 0.1) 0%, transparent 70%);
    animation: float 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(5deg); }
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInUp 1s ease;
}

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

.greeting {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gradient-light);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--primary-darker);
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.greeting i {
    animation: wave 1.5s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(20deg); }
    75% { transform: rotate(-10deg); }
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.hero-title span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--gray-dark);
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.hero-description {
    color: var(--text-medium);
    font-size: 1.05rem;
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 2rem;
    border-radius: 50px;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(30, 136, 229, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(30, 136, 229, 0.5);
}

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

.btn-secondary:hover {
    background: var(--primary-light);
    transform: translateY(-3px);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInUp 1s ease 0.3s backwards;
}

.image-wrapper {
    position: relative;
    width: 380px;
    height: 380px;
}

.image-wrapper::before {
    content: '';
    position: absolute;
    inset: -15px;
    background: var(--gradient-primary);
    border-radius: 50%;
    z-index: -1;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

.image-wrapper::after {
    content: '';
    position: absolute;
    inset: -30px;
    border: 2px dashed var(--primary);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 6px solid var(--white);
    box-shadow: var(--shadow-strong);
}

.floating-badge {
    position: absolute;
    background: var(--white);
    padding: 0.8rem 1.2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-medium);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-dark);
    animation: floatBadge 3s ease-in-out infinite;
}

.floating-badge i {
    color: var(--primary-dark);
}

.badge-1 {
    top: 10%;
    left: -20%;
    animation-delay: 0s;
}

.badge-2 {
    bottom: 15%;
    right: -25%;
    animation-delay: 1s;
}

.badge-3 {
    top: 60%;
    left: -30%;
    animation-delay: 2s;
}

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

/* Section Styles */
section {
    padding: 100px 5%;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-tag {
    display: inline-block;
    background: var(--gradient-light);
    color: var(--primary-darker);
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--gray-dark);
    font-size: 1.05rem;
}

/* About Section */
.about {
    background: var(--off-white);
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    max-width: 450px;
    border-radius: 20px;
    box-shadow: var(--shadow-strong);
}

.experience-badge {
    position: absolute;
    bottom: -20px;
    right: 20px;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 1.5rem 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow-medium);
}

.experience-badge .number {
    font-size: 2rem;
    font-weight: 800;
    display: block;
}

.experience-badge .text {
    font-size: 0.85rem;
    opacity: 0.9;
}

.about-content h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.about-content p {
    color: var(--text-medium);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.about-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.about-info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
}

.about-info-item i {
    width: 40px;
    height: 40px;
    background: var(--primary-light);
    color: var(--primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    font-size: 1rem;
    flex-shrink: 0;
}

.about-info-item .info-text {
    display: flex;
    flex-direction: column;
}

.about-info-item .label {
    font-size: 0.8rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.about-info-item .value {
    font-weight: 600;
    color: var(--text-dark);
}

/* Qualifications Section */
.qualifications {
    background: var(--white);
}

.qual-container {
    max-width: 1000px;
    margin: 0 auto;
}

.qual-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.qual-tab {
    padding: 0.8rem 2rem;
    border: none;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.qual-tab.active {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-medium);
}

.qual-tab:hover:not(.active) {
    background: var(--primary);
    color: var(--white);
}

.qual-content {
    display: none;
}

.qual-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-primary);
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    padding-bottom: 2.5rem;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -36px;
    top: 5px;
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid var(--white);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.timeline-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--gray-light);
    transition: all 0.3s ease;
}

.timeline-card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateX(5px);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.8rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.timeline-title {
    font-size: 1.1rem;
    color: var(--text-dark);
}

.timeline-date {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.timeline-institution {
    color: var(--primary-dark);
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.timeline-institution i {
    font-size: 0.9rem;
}

.timeline-description {
    color: var(--text-medium);
    font-size: 0.95rem;
}

/* Skills Section */
.skills {
    background: var(--off-white);
}

.skills-container {
    max-width: 1000px;
    margin: 0 auto;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: var(--white);
    padding: 2rem 1.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--gray-light);
    transition: all 0.3s ease;
}

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

.skill-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    background: var(--gradient-light);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--primary-dark);
    transition: all 0.3s ease;
}

.skill-card:hover .skill-icon {
    background: var(--gradient-primary);
    color: var(--white);
    transform: scale(1.1);
}

.skill-name {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.95rem;
}

/* Projects Section */
.projects-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--gray-light);
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-strong);
}

.project-image {
    height: 200px;
    background: var(--gradient-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--primary);
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.project-description {
    color: var(--text-medium);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

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

.project-tag {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

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

.contact-container {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.contact-info p {
    color: var(--text-medium);
    margin-bottom: 2rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
}

.contact-method:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-medium);
}

.contact-method .icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.contact-method .details .label {
    font-size: 0.8rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-method .details .value {
    font-weight: 600;
    color: var(--text-dark);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-link {
    width: 50px;
    height: 50px;
    background: var(--white);
    color: var(--primary-dark);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    text-decoration: none;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--gradient-primary);
    color: var(--white);
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.contact-form-wrapper {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-medium);
}

.contact-form h4 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-dark);
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.9rem 1.2rem;
    border: 2px solid var(--gray-light);
    border-radius: 12px;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    color: var(--text-dark);
    background: var(--off-white);
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(100, 181, 246, 0.1);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.submit-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(30, 136, 229, 0.4);
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(30, 136, 229, 0.5);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.form-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 10px;
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    display: block;
    background: #d4edda;
    color: #155724;
}

.form-message.error {
    display: block;
    background: #f8d7da;
    color: #721c24;
}

/* Footer */
footer {
    background: var(--text-dark);
    color: var(--white);
    text-align: center;
    padding: 3rem 5%;
}

.footer-logo {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 1rem;
}

.footer-text {
    color: var(--gray);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 1.5rem 0;
}

.footer-links a {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary);
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        order: 2;
    }

    .hero-image {
        order: 1;
    }

    .hero-description {
        margin: 0 auto 2rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .image-wrapper {
        width: 300px;
        height: 300px;
    }

    .floating-badge {
        display: none;
    }

    .about-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-image {
        display: flex;
        justify-content: center;
    }

    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        align-items: center;
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: var(--shadow-medium);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

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

    .about-info-grid {
        grid-template-columns: 1fr;
    }

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

    .qual-tabs {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 100px 5% 60px;
    }

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

    .image-wrapper {
        width: 250px;
        height: 250px;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }

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