/* ======= CSS RESET ======= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ======= COLOR VARIABLES ======= */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #16a34a;
    --dark-color: #111827;
    --light-color: #f9fafb;
    --gray-color: #6b7280;
    --body-color: #ffffff;
    --section-bg: #f3f4f6;
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --success-color: #22c55e;
    --error-color: #ef4444;
}

/* ======= BASE STYLES ======= */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--body-color);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
    color: var(--gray-color);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

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

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 5rem 0;
}

section:nth-child(even) {
    background-color: var(--section-bg);
}

/* ======= UTILITY CLASSES ======= */
.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(37, 99, 235, 0.4);
    color: #fff;
}

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

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

.highlight {
    color: var(--primary-color);
}

.underline {
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 0 auto 2rem;
    border-radius: 2px;
}

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

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    position: relative;
}

/* ======= HEADER ======= */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    padding: 1rem 0;
}

header.scrolled {
    padding: 0.8rem 0;
    background-color: #fff;
}

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

.logo a {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-color);
}

.nav ul {
    display: flex;
}

.nav ul li {
    margin-left: 2rem;
}

.nav ul li a {
    color: var(--dark-color);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav ul li a:after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav ul li a:hover:after,
.nav ul li a.active:after {
    width: 100%;
}

.menu-btn {
    display: none;
    cursor: pointer;
}

.menu-btn__burger {
    width: 25px;
    height: 3px;
    background-color: var(--dark-color);
    border-radius: 5px;
    transition: all 0.3s ease;
    position: relative;
}

.menu-btn__burger::before,
.menu-btn__burger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 3px;
    background-color: var(--dark-color);
    border-radius: 5px;
    transition: all 0.3s ease;
}

.menu-btn__burger::before {
    transform: translateY(-8px);
}

.menu-btn__burger::after {
    transform: translateY(8px);
}

/* ======= HERO SECTION ======= */
.hero {
    padding: 8rem 0 5rem;
    background-color: var(--light-color);
    overflow: hidden;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    top: -250px;
    right: -250px;
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(22, 163, 74, 0.1) 0%, rgba(34, 197, 94, 0.1) 100%);
    bottom: -150px;
    left: -150px;
    z-index: 0;
}

.hero .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-content h2 {
    font-size: 1.8rem;
    color: var(--gray-color);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
}

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

.social-icons a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--dark-color);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.social-icons a:hover {
    background-color: var(--primary-color);
    color: #fff;
    transform: translateY(-3px);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    position: relative;
}

.hero-image img {
    width: 90%;
    max-width: 450px;
    border-radius: 20px;
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.15);
}

/* ======= ABOUT SECTION ======= */
.about-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 4rem;
}

.about-image {
    flex: 1;
}

.about-image img {
    border-radius: 20px;
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.15);
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.about-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.detail {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.detail i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.detail h4 {
    margin-bottom: 0.3rem;
    font-size: 1.1rem;
}

.detail p {
    margin-bottom: 0;
    color: var(--gray-color);
}

/* ======= SKILLS SECTION ======= */
.skills-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skills-category h3 {
    margin-bottom: 1.5rem;
    text-align: center;
}

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

.skill {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: all 0.3s ease;
}

.skill:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.skill-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 50%;
}

.skill h4 {
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background-color: #e5e7eb;
    border-radius: 3px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 3px;
}

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

.filter-btn {
    padding: 0.6rem 1.5rem;
    background-color: #fff;
    border: none;
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--primary-color);
    color: #fff;
}

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

.project-card {
    background-color: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.project-image {
    width: 100%;
    height: 200px;
    position: relative;
    overflow: hidden;
}

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

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.project-card:hover .overlay {
    opacity: 1;
}

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

.project-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--dark-color);
    transition: all 0.3s ease;
}

.project-links a:hover {
    background-color: var(--primary-color);
    color: #fff;
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.project-tech span {
    padding: 0.3rem 0.8rem;
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* ======= PRIZE & CERTIFICATES SECTION ======= */
.prizes {
    position: relative;
    overflow: hidden;
}

.slider-container {
    position: relative;
    width: 100%;
    padding: 20px 0;
}

.slider {
    width: 100%;
    overflow: hidden;
    position: relative;
}

.slide-track {
    display: flex;
    width: calc(250px * 8); /* Adjust based on number of slides */
    transition: transform 0.5s ease-in-out;
}

.slide {
    padding: 0 15px;
    flex: 0 0 auto;
    width: 350px;
}

.prize-card {
    background-color: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.prize-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.prize-image {
    height: 200px;
    overflow: hidden;
}

.prize-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.5s ease;
}

.prize-card:hover .prize-image img {
    transform: scale(1.05);
}

.prize-info {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.prize-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.prize-info p {
    color: var(--gray-color);
    margin-bottom: 1rem;
    flex-grow: 1;
}

.prize-date {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 500;
}

.slider-controls {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    gap: 1rem;
}

.slider-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #fff;
    border: none;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--dark-color);
}

.slider-btn:hover {
    background-color: var(--primary-color);
    color: #fff;
    transform: translateY(-3px);
}

.slider-btn:focus {
    outline: none;
}

/* Lightbox styles */
.lightbox {
    display: none;
    position: fixed;
    z-index: 1500;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s;
}

.lightbox-content {
    position: relative;
    margin: auto;
    padding: 0;
    width: 90%;
    max-width: 1000px;
    height: 80%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    animation: zoomIn 0.3s;
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.1);
}

.close-lightbox {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
    z-index: 1501;
}

.close-lightbox:hover {
    color: var(--primary-color);
}

.lightbox-prev,
.lightbox-next {
    cursor: pointer;
    position: absolute;
    top: 50%;
    width: auto;
    padding: 16px;
    margin-top: -50px;
    color: white;
    font-weight: bold;
    font-size: 30px;
    transition: 0.3s;
    border-radius: 0 5px 5px 0;
    user-select: none;
    -webkit-user-select: none;
    background-color: rgba(0, 0, 0, 0.5);
}

.lightbox-next {
    right: 0;
    border-radius: 5px 0 0 5px;
}

.lightbox-prev {
    left: 0;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background-color: var(--primary-color);
}

.certificate-img {
    cursor: pointer;
    transition: transform 0.3s;
}

.certificate-img:hover {
    transform: scale(1.05);
}

/* Lightbox animations */
@keyframes zoomIn {
    from {transform: scale(0.8); opacity: 0;}
    to {transform: scale(1); opacity: 1;}
}

@keyframes fadeIn {
    from {opacity: 0}
    to {opacity: 1}
}

/* ======= CONTACT SECTION ======= */
.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

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

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-item .icon {
    width: 50px;
    height: 50px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.3rem;
    color: var(--primary-color);
}

.contact-item .text h3 {
    margin-bottom: 0.3rem;
    font-size: 1.2rem;
}

.contact-item .text p {
    margin-bottom: 0;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(37, 99, 235, 0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--primary-color);
    color: #fff;
}

.contact-form {
    background-color: #fff;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1.2rem;
    border: 1px solid #e5e7eb;
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    color: var(--dark-color);
    background-color: #f9fafb;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
    background-color: #fff;
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* ======= FOOTER ======= */
footer {
    background-color: var(--dark-color);
    padding: 2rem 0;
    color: #fff;
}

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

.back-to-top a {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.back-to-top a:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px);
}

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

/* ======= MEDIA QUERIES ======= */
@media screen and (max-width: 992px) {
    .hero-content h1 {
        font-size: 2.8rem;
    }
    
    .about-content {
        flex-direction: column;
        gap: 3rem;
    }
    
    .about-image {
        max-width: 500px;
        margin: 0 auto;
    }
}

@media screen and (max-width: 768px) {
    html {
        font-size: 95%;
    }
    
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        margin-bottom: 3rem;
    }
    
    .cta-buttons,
    .social-icons {
        justify-content: center;
    }
    
    .hero-image {
        justify-content: center;
    }
    
    .menu-btn {
        display: block;
        z-index: 1001;
    }
    
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: #fff;
        padding: 5rem 1.5rem;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        transition: all 0.4s ease;
        z-index: 1000;
    }
    
    .nav.open {
        right: 0;
    }
    
    .nav ul {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .nav ul li {
        margin-left: 0;
    }
    
    .nav ul li a {
        display: block;
        padding: 0.5rem 0;
    }
    
    .menu-btn.open .menu-btn__burger {
        transform: rotate(45deg);
    }
    
    .menu-btn.open .menu-btn__burger::before {
        transform: rotate(90deg) translate(0);
    }
    
    .menu-btn.open .menu-btn__burger::after {
        opacity: 0;
    }
    
    .about-details {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}

@media screen and (max-width: 576px) {
    html {
        font-size: 90%;
    }
    
    .hero-content h1 {
        font-size: 2.3rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }
}