/* ===== CSS VARIABLES ===== */
:root {
    --primary-color: #0891b2;
    --primary-dark: #0e7490;
    --primary-light: #22d3ee;
    --secondary-color: #06b6d4;
    --accent-color: #14b8a6;
    --dark-bg: #0a1628;
    --dark-bg-light: #0f2137;
    --dark-bg-lighter: #1a3a5c;
    --text-primary: #e0f2fe;
    --text-secondary: #7dd3fc;
    --text-muted: #38bdf8;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #0891b2, #06b6d4, #14b8a6);
    --gradient-accent: linear-gradient(135deg, #0ea5e9, #0891b2);
    --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);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

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

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-transform: capitalize;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

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

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

/* ===== SECTION TITLE ===== */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 10px 0;
    box-shadow: var(--shadow-lg);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

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

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

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px 20px 50px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

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

.greeting {
    color: var(--primary-light);
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 10px;
}

.name {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 10px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title {
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 10px;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--dark-bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--gradient-primary);
    color: var(--white);
    transform: translateY(-3px);
}

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

.hero-image .profile-photo {
    width: 350px;
    height: 350px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid transparent;
    background: var(--gradient-primary) border-box;
    box-shadow: 0 0 30px rgba(8, 145, 178, 0.4);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator a {
    color: var(--text-muted);
    font-size: 1.5rem;
}

/* ===== ABOUT SECTION ===== */
.about {
    padding: 100px 0;
    background: var(--dark-bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
    margin-top: 50px;
}

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

.image-frame {
    position: relative;
    width: 300px;
    height: 350px;
}

.image-frame::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: -20px;
    bottom: -20px;
    border: 3px solid var(--primary-color);
    border-radius: 10px;
}

.image-frame .about-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
    position: relative;
    z-index: 1;
}

.about-text h3 {
    font-size: 1.8rem;
    color: var(--primary-light);
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    text-align: justify;
}

.about-info {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 30px 0;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-secondary);
}

.info-item i {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

/* ===== SKILLS SECTION ===== */
.skills {
    padding: 100px 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.skill-category {
    background: var(--dark-bg-light);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid transparent;
}

.skill-category:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}

.category-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.category-icon i {
    font-size: 1.8rem;
    color: var(--white);
}

.skill-category h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.skill-category ul {
    text-align: left;
}

.skill-category li {
    color: var(--text-secondary);
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
}

.skill-category li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* ===== PROJECTS SECTION ===== */
.projects {
    padding: 100px 0;
    background: var(--dark-bg-light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 380px));
    justify-content: center;
    justify-items: center;
    gap: 30px;
    margin-top: 50px;
}

.project-card {
    background: var(--dark-bg);
    border-radius: 15px;
    overflow: hidden;
    width: 100%;
    max-width: 380px;
    transition: var(--transition);
    border: 1px solid var(--dark-bg-lighter);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
}

.project-image {
    height: 240px;
    position: relative;
    overflow: hidden;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    opacity: 0;
    transition: var(--transition);
}

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

.project-link {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    transform: translateY(20px);
    transition: var(--transition);
}

.project-card:hover .project-link {
    transform: translateY(0);
}

.project-link:hover {
    background: var(--primary-dark);
}

.project-content {
    padding: 25px;
}

.project-tag {
    display: inline-block;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 15px;
}

.project-content h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.project-subtitle {
    color: var(--primary-light);
    font-size: 0.9rem;
    font-style: italic;
    margin-bottom: 15px;
}

.project-content > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.project-highlights {
    background: var(--dark-bg-light);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 15px;
}

.project-highlights h4 {
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-bottom: 10px;
}

.project-highlights ul {
    font-size: 0.85rem;
}

.project-highlights li {
    color: var(--text-secondary);
    padding: 5px 0;
    padding-left: 15px;
    position: relative;
}

.project-highlights li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-tech span {
    background: var(--dark-bg-lighter);
    color: var(--text-secondary);
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.75rem;
}

/* ===== EXPERIENCE SECTION ===== */
.experience {
    padding: 100px 0;
}

.timeline {
    max-width: 800px;
    margin: 50px auto 0;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
}

.timeline-item {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    position: relative;
}

.timeline-icon {
    width: 100px;
    min-width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    position: relative;
    z-index: 1;
}

.timeline-icon.education {
    background: var(--gradient-primary);
}

.timeline-icon.work {
    background: var(--gradient-accent);
}

.timeline-content {
    background: var(--dark-bg-light);
    padding: 25px;
    border-radius: 15px;
    flex: 1;
    border: 1px solid var(--dark-bg-lighter);
}

.timeline-date {
    display: inline-block;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 15px;
}

.timeline-content h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.timeline-content h4 {
    color: var(--primary-light);
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 15px;
}

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

.experience-list {
    margin-top: 10px;
}

.experience-list li {
    color: var(--text-secondary);
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.experience-list li i {
    color: var(--secondary-color);
}

/* ===== CONTACT SECTION ===== */
.contact {
    padding: 100px 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr;
    justify-content: center;
    justify-items: center;
    gap: 30px;
    margin: 50px auto 0;
    max-width: 800px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 25px;
    width: 100%;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 20px;
    background: var(--dark-bg-light);
    border-radius: 15px;
    transition: var(--transition);
    width: 100%;
    max-width: 600px;
}

.contact-item:hover {
    transform: translateX(10px);
    border-left: 3px solid var(--primary-color);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}

.contact-details h4 {
    color: var(--text-primary);
    margin-bottom: 5px;
}

.contact-details a,
.contact-details p {
    color: var(--text-secondary);
}

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

/* ===== FOOTER ===== */
.footer {
    background: var(--dark-bg-light);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    font-size: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.footer-logo p {
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: var(--text-secondary);
}

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

.footer-social {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
}

.footer-social a {
    width: 45px;
    height: 45px;
    background: var(--dark-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--gradient-primary);
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--dark-bg-lighter);
}

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

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

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-text {
        order: 2;
    }

    .hero-image {
        order: 1;
    }

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

    .social-links {
        justify-content: center;
    }

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

    .about-info {
        align-items: center;
    }

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

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

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

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
    }

    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--dark-bg);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        transform: translateY(-150%);
        opacity: 0;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-toggle {
        display: block;
    }

    .name {
        font-size: 2.5rem;
    }

    .hero-image .profile-photo {
        width: 250px;
        height: 250px;
    }

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

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

    .timeline::before {
        left: 30px;
    }

    .timeline-icon {
        width: 60px;
        min-width: 60px;
        height: 60px;
        font-size: 1.2rem;
    }

    .timeline-content {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 2rem;
    }

    .name {
        font-size: 2rem;
    }

    .title {
        font-size: 1.2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}