:root {
    --primary-dark: #0a192f;
    --primary-medium: #112240;
    --primary-light: #233554;
    --accent: #1E4C7C;
    --text-light: #e6f1ff;
    --text-medium: #a8b2d1;
    --text-dark: #495670;
    --white: #ffffff;
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
    --border-radius: 4px;
    --shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

.light-mode {
    --primary-dark: #f0f6ff;
    --primary-medium: #e1e8f5;
    --primary-light: #c9d6ea;
    --accent: #1E4C7C;
    --text-light: #0a192f;
    --text-medium: #233554;
    --text-dark: #495670;
    --white: #0a192f;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--primary-dark);
    color: var(--text-light);
    line-height: 1.6;
    transition: var(--transition);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--primary-dark);
    box-shadow: var(--shadow);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--accent);
    text-decoration: none;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: var(--transition);
}

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

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    margin-left: 1rem;
}

.theme-toggle:hover {
    color: var(--accent);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 0 4rem;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-medium) 100%);
    position: relative;
    overflow: hidden;
}

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

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

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

.hero-title span {
    color: var(--accent);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-medium);
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-medium);
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

.btn {
    padding: 0.8rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--primary-dark);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px -10px var(--accent);
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-secondary:hover {
    background-color: rgba(30, 76, 124, 0.1);
}

.hero-image {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 50%;
    height: 80%;
    background: url('IMG-20250908-WA0168.png') center/cover no-repeat;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    opacity: 0.3;
    animation: morph 15s ease-in-out infinite;
}

@keyframes morph {
    0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    25% { border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%; }
    50% { border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%; }
    75% { border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%; }
    100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
}

/* Section Styling */
section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    font-size: 2.5rem;
    color: var(--text-light);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--accent);
    margin: 0.5rem auto;
}

/* Projects Section */
.projects {
    background-color: var(--primary-medium);
}

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

.project-card {
    background-color: var(--primary-dark);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
}

.project-image {
    height: 200px;
    background-size: cover;
    background-position: center;
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    margin-bottom: 1rem;
    color: var(--text-light);
}

.project-content p {
    color: var(--text-medium);
    margin-bottom: 1.5rem;
}

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

.project-tag {
    background-color: rgba(30, 76, 124, 0.2);
    color: var(--accent);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

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

.project-link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.project-link:hover {
    color: var(--accent);
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h3 {
    color: var(--accent);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

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

.about-image {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    height: 500px;
    background: url('e-osumba.png') center/cover no-repeat;
}

/* Skills Section */
.skills-categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
}

.skills-category {
    background-color: var(--primary-medium);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.skills-category:hover {
    transform: translateY(-5px);
}

.skills-category h3 {
    color: var(--accent);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-badge {
    background-color: rgba(30, 76, 124, 0.2);
    color: var(--text-light);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.skill-badge:hover {
    background-color: var(--accent);
    color: var(--primary-dark);
    transform: translateY(-2px);
}

/* Experience Section */
.experience {
    background-color: var(--primary-medium);
}

.experience-timeline {
    display: grid;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.timeline-item {
    opacity: 0.8;
    transition: var(--transition);
}

.timeline-item.active {
    opacity: 1;
}

.timeline-item:hover {
    opacity: 1;
    transform: translateY(-5px);
}

.timeline-card {
    background: var(--primary-dark);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.timeline-status {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background-color: rgba(30, 76, 124, 0.2);
    color: var(--accent);
    border: 1px solid var(--accent);
}

.timeline-status.completed {
    background: rgba(74, 222, 128, 0.1);
    color: #10b981;
    border: 1px solid #10b981;
}

.position-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.company-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.company-info i {
    color: var(--accent);
}

.company-name {
    font-weight: 600;
    color: var(--text-light);
}

.company-type {
    background: var(--accent);
    color: var(--primary-dark);
    padding: 0.2rem 0.8rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.job-description {
    color: var(--text-medium);
    margin-bottom: 1.5rem;
}

.achievements {
    margin-bottom: 1.5rem;
}

.achievement-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-medium);
}

.achievement-item i {
    color: var(--accent);
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    background: rgba(30, 76, 124, 0.2);
    color: var(--accent);
    padding: 0.3rem 0.8rem;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: var(--transition);
}

.tech-tag:hover {
    background: var(--accent);
    color: var(--primary-dark);
}

/* Education Section */
.education-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.education-card {
    background: var(--primary-medium);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.education-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent);
}

.education-card:hover {
    transform: translateY(-5px);
}

.education-card h3 {
    color: var(--text-light);
    margin-bottom: 1rem;
}

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

.duration {
    color: var(--text-medium);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.course-bubble {
    background: rgba(30, 76, 124, 0.2);
    color: var(--accent);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: var(--transition);
}

.course-bubble:hover {
    background: var(--accent);
    color: var(--primary-dark);
}

/* Contact Section */
.contact {
    background-color: var(--primary-medium);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

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

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

.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-dark);
}

.contact-details h3 {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: var(--text-medium);
}

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

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--accent);
    color: var(--primary-dark);
    transform: translateY(-3px);
}

.contact-form {
    background: var(--primary-dark);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

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

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

.form-control {
    width: 100%;
    padding: 0.8rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--primary-light);
    background-color: var(--primary-medium);
    color: var(--text-light);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
}

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

/* Footer */
footer {
    background-color: var(--primary-dark);
    padding: 3rem 0 1.5rem;
}

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

.footer-section h4 {
    color: var(--accent);
    margin-bottom: 1rem;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-light);
}

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

.footer-description {
    color: var(--text-medium);
    margin-bottom: 1rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(30, 76, 124, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

.footer-social-link:hover {
    background: var(--accent);
    color: var(--primary-dark);
    transform: translateY(-3px);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--text-medium);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-contact p {
    color: var(--text-medium);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-contact i {
    color: var(--accent);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--primary-light);
}

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

.footer-bottom-links a {
    color: var(--text-medium);
    text-decoration: none;
    transition: var(--transition);
}

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

.copyright {
    color: var(--text-medium);
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .mobile-menu {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        right: -100%;
        flex-direction: column;
        background-color: var(--primary-medium);
        width: 80%;
        max-width: 300px;
        height: calc(100vh - 70px);
        padding: 2rem;
        transition: var(--transition);
        box-shadow: var(--shadow);
    }

    .nav-links.active {
        right: 0;
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding: 100px 0 40px;
    }

    .hero-content {
        width: 100%;
        max-width: none;
    }

    .hero-image {
        display: none;
    }

    .hero-title {
        font-size: 2.3rem;
    }

    .hero-btns {
        flex-direction: column;
        align-items: center;
    }

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

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

    .education-cards {
        grid-template-columns: 1fr;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }

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

    .timeline-card {
        padding: 1.5rem;
    }

    .timeline-status {
        position: static;
        display: inline-block;
        margin-bottom: 1rem;
    }
}