/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0099e5;
    --bg-color: #f5f5f5;
    --text-dark: #333333;
    --text-medium: #666666;
    --text-light: #999999;
    --white: #ffffff;
    --sidebar-width: 280px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

/* Sidebar Styles */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--white);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.sidebar-content {
    padding: 2rem;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.profile-section {
    text-align: center;
    margin-bottom: 2rem;
}

.profile-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 1rem;
    overflow: hidden;
    border: 4px solid var(--primary-color);
}

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

.name {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.title {
    color: var(--text-medium);
    font-size: 0.9rem;
    font-weight: 400;
}

.nav-menu {
    list-style: none;
    flex-grow: 1;
}

.nav-menu li {
    margin-bottom: 0.5rem;
}

.nav-link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-medium);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background-color: rgba(0, 153, 229, 0.1);
}

.mobile-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1001;
    background: var(--primary-color);
    border: none;
    border-radius: var(--border-radius);
    width: 40px;
    height: 40px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.mobile-toggle span {
    width: 20px;
    height: 2px;
    background: var(--white);
    margin: 2px 0;
    transition: var(--transition);
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    padding: 2rem;
}

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

.section {
    display: none;
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.section.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.section-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* About Section */
.about-content {
    display: grid;
    gap: 2rem;
}

.intro {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

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

.key-highlights {
    background: var(--bg-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-top: 2rem;
}

.key-highlights h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.key-highlights ul {
    list-style: none;
}

.key-highlights li {
    padding: 0.5rem 0;
    color: var(--text-medium);
}

/* Experience Section */
.experience-timeline,
.education-timeline {
    position: relative;
    padding-left: 2rem;
}

.experience-timeline::before,
.education-timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-color);
}

.experience-item,
.education-item {
    position: relative;
    margin-bottom: 2rem;
    display: flex;
    gap: 2rem;
}

.experience-item::before,
.education-item::before {
    content: '';
    position: absolute;
    left: -26px;
    top: 0.5rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary-color);
}

.experience-date,
.education-date {
    min-width: 120px;
    font-weight: 500;
    color: var(--primary-color);
    font-size: 0.9rem;
}

.experience-content,
.education-content {
    flex: 1;
}

.position,
.degree {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.company,
.institution {
    color: var(--text-medium);
    font-weight: 500;
    margin-bottom: 1rem;
}

.responsibilities {
    list-style: none;
    padding-left: 1rem;
}

.responsibilities li {
    position: relative;
    margin-bottom: 0.5rem;
    color: var(--text-medium);
}

.responsibilities li::before {
    content: '▸';
    position: absolute;
    left: -1rem;
    color: var(--primary-color);
}

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

.skill-category {
    background: var(--bg-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
}

.skill-category h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

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

.skill-tag {
    background: var(--white);
    color: var(--text-medium);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    border: 2px solid transparent;
    transition: var(--transition);
}

.skill-tag:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Portfolio Section */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.portfolio-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.portfolio-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

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

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 153, 229, 0.9);
    color: var(--white);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
    opacity: 0;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.portfolio-overlay p {
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.portfolio-link {
    color: var(--white);
    text-decoration: none;
    border: 2px solid var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.portfolio-link:hover {
    background: var(--white);
    color: var(--primary-color);
}

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

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

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

.contact-details {
    space-y: 1rem;
}

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

.contact-item strong {
    color: var(--text-dark);
    display: inline-block;
    min-width: 80px;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-form h3 {
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    background: #0088cc;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 153, 229, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .mobile-toggle {
        display: flex;
    }

    .main-content {
        margin-left: 0;
        padding: 1rem;
        padding-top: 4rem;
    }

    .section {
        padding: 1.5rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .experience-item,
    .education-item {
        flex-direction: column;
        gap: 0.5rem;
    }

    .experience-date,
    .education-date {
        min-width: auto;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

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

@media (max-width: 480px) {
    .main-content {
        padding: 0.5rem;
        padding-top: 3.5rem;
    }

    .section {
        padding: 1rem;
        margin-bottom: 1rem;
    }

    .sidebar-content {
        padding: 1.5rem;
    }

    .profile-image {
        width: 100px;
        height: 100px;
    }

    .name {
        font-size: 1.3rem;
    }
}

/* Placeholder image styling */
img[src="profile-placeholder.jpg"],
img[src="project-placeholder.jpg"] {
    background: linear-gradient(135deg, var(--primary-color), #66b3ff);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 500;
}

img[src="profile-placeholder.jpg"]::before {
    content: "Profile Photo";
}

img[src="project-placeholder.jpg"]::before {
    content: "Project Image";
}

/* Language Picker */
.language-picker {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #e0e0e0;
}

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

.language-select {
    width: 100%;
    padding: 0.5rem;
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius);
    background: var(--white);
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--text-dark);
    cursor: pointer;
    transition: var(--transition);
}

.language-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.language-select:hover {
    border-color: var(--primary-color);
}