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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

/* Header & Navigation */
header {
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 5px var(--shadow);
}

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

nav h1 {
    font-size: 1.5rem;
}

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

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

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

/* Theme Switcher Dropdown */
.theme-switcher {
    position: relheader-text;
}

.theme-switcher select {
    background-color: var(--bg-secondary);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    border-radius: 5px;
    font-size: 0.9rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    transition: all 0.3s ease;
}

.theme-switcher select:hover {
    border-color: var(--secondary-color);
}

.theme-switcher select:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* Dark theme select styling */
:root[data-theme="dark"] .theme-switcher select,
html[data-theme="dark"] .theme-switcher select,
:root[data-theme="ocean"] .theme-switcher select,
html[data-theme="ocean"] .theme-switcher select,
:root[data-theme="forest"] .theme-switcher select,
html[data-theme="forest"] .theme-switcher select,
:root[data-theme="purple"] .theme-switcher select,
html[data-theme="purple"] .theme-switcher select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23eaeaea' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--header-text);
    padding: 6rem 0;
    text-align: center;
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
}

/* Sections */
.section {
    padding: 4rem 0;
    background-color: var(--bg-secondary);
    margin: 2rem 0;
}

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

.section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-weight: 700;
}

.section p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Footer */
footer {
    background-color: var(--header-bg);
    color: var(--header-text);
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

footer p {
    margin: 0;
    padding: 0 1rem;
    font-size: 0.95rem;
}

/* Error Page */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--header-text);
}

.error-page h1 {
    font-size: 6rem;
    margin-bottom: 1rem;
}

.error-page h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.error-page p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: var(--secondary-color);
    color: var(--header-text);
    text-decoration: none;
    border-radius: 6px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 2px 4px var(--shadow);
}

.btn:hover {
    transform: translateY(-2px);
    background-color: var(--accent-color);
    box-shadow: 0 4px 8px var(--shadow);
}

/* Showcase Elements */
.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
    align-items: center;
}

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

.btn-secondary:hover {
    background-color: var(--secondary-color);
    color: var(--header-text);
}

.color-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.color-box {
    height: 120px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    box-shadow: 0 2px 8px var(--shadow);
    transition: transform 0.3s ease;
}

.color-box:hover {
    transform: translateY(-4px);
}

.color-box.primary {
    background-color: var(--primary-color);
    color: var(--header-text);
}

.color-box.secondary {
    background-color: var(--secondary-color);
    color: var(--header-text);
}

.color-box.accent {
    background-color: var(--accent-color);
    color: var(--header-text);
}

.color-box.background {
    background-color: var(--bg-secondary);
    color: var(--text-color);
    border: 2px solid var(--border-color);
}

h3 {
    color: var(--text-color);
    margin: 2rem 0 1rem;
    font-size: 1.5rem;
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 768px) {
    nav .container {
        flex-wrap: wrap;
    }
    
    .nav-links {
        gap: 0.5rem;
        font-size: 0.9rem;
    }
    
    .theme-switcher select {
        padding: 0.4rem 1.8rem 0.4rem 0.5rem;
        font-size: 0.85rem;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section {
        padding: 2rem 0;
    }
    
    .error-page h1 {
        font-size: 4rem;
    }
    
    .color-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 1rem;
    }
    
    .color-box {
        height: 100px;
        font-size: 0.9rem;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .button-group .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    nav h1 {
        font-size: 1.2rem;
    }
    
    .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 0.5rem;
        margin-top: 0.5rem;
        align-items: center;
    }
    
    .nav-links li {
        display: block;
    }
    
    header {
        padding: 0.75rem 0;
    }
}

/* Profile & Professional Styles */

/* Hero subtitle */
.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.skill-card {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px var(--shadow);
}

.skill-card h3 {
    color: var(--text-color);
    margin: 0 0 1rem 0;
    font-size: 1.3rem;
}

.skill-card p {
    color: var(--text-secondary);
    margin: 0;
}

/* Tech Stack */
.tech-stack {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 2rem;
}

.tech-category {
    background-color: var(--bg-color);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 6px var(--shadow);
}

.tech-category h3 {
    color: var(--text-color);
    margin: 0 0 1rem 0;
    font-size: 1.2rem;
}

/* Skill Tags */
.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

.skill-tag {
    display: inline-block;
    background-color: var(--secondary-color);
    color: var(--header-text);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.skill-tag:hover {
    background-color: var(--accent-color);
    transform: scale(1.05);
}

/* Contact Grid */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.contact-item-link {
    text-decoration: none;
    display: block;
}

.contact-item {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 8px var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.contact-item-link:hover .contact-item {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px var(--shadow);
}

.contact-item h3 {
    color: var(--text-color);
    margin: 0 0 1rem 0;
    font-size: 1.2rem;
}

.contact-item p {
    color: var(--secondary-color);
    font-weight: 600;
    margin: 0;
    transition: color 0.3s ease;
}

.contact-item-link:hover .contact-item p {
    color: var(--accent-color);
}

/* Contact Icon Styles (Email, GitHub, LinkedIn) */
.email-icon,
.github-icon,
.linkedin-icon {
    width: 1.2em;
    height: 1.2em;
    vertical-align: middle;
    display: inline-block;
    fill: currentColor;
    margin-right: 0.5rem;
}

.contact-item .email-icon,
.contact-item .github-icon,
.contact-item .linkedin-icon {
    width: 2.5rem;
    height: 2.5rem;
    margin: 0 0 0.5rem 0;
    color: var(--text-color);
    transition: color 0.3s ease, transform 0.3s ease;
}

.contact-item-link:hover .email-icon {
    color: var(--secondary-color);
    transform: scale(1.1);
}

.contact-item-link:hover .github-icon {
    color: var(--secondary-color);
    transform: scale(1.1) rotate(5deg);
}

.contact-item-link:hover .linkedin-icon {
    color: #0077b5;
    transform: scale(1.1) rotate(-5deg);
}

.btn .email-icon,
.btn-secondary .email-icon,
.btn-small .email-icon,
.btn .github-icon,
.btn-secondary .github-icon,
.btn-small .github-icon,
.btn .linkedin-icon,
.btn-secondary .linkedin-icon,
.btn-small .linkedin-icon {
    width: 1em;
    height: 1em;
    margin-right: 0.4rem;
    vertical-align: -0.15em;
}

/* Experience Styles */
.experience-item {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow);
    margin-bottom: 2rem;
}

.experience-item h3 {
    color: var(--text-color);
    margin: 0 0 0.5rem 0;
    font-size: 1.5rem;
}

.experience-meta {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 1.5rem;
}

.experience-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.experience-list li {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
}

.experience-list li:before {
    content: "▹";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

.experience-list strong {
    color: var(--text-color);
    font-weight: 600;
}

/* Skills Detail */
.skills-detail {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.skill-category {
    background-color: var(--bg-color);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 6px var(--shadow);
}

.skill-category h3 {
    color: var(--text-color);
    margin: 0 0 1rem 0;
    font-size: 1.2rem;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px var(--shadow);
}

.project-card.featured {
    border-left: 4px solid var(--secondary-color);
}

.project-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.project-header h3 {
    color: var(--text-color);
    margin: 0;
    font-size: 1.3rem;
    flex: 1;
    min-width: 200px;
}

.project-tag {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--header-text);
    padding: 0.3rem 0.7rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

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

.tech-badge {
    display: inline-block;
    background-color: var(--bg-secondary);
    color: var(--text-color);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
}

.project-features {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.project-features h4 {
    color: var(--text-color);
    font-size: 1rem;
    margin: 0 0 0.75rem 0;
}

.project-features ul {
    margin: 0;
    padding-left: 1.2rem;
    color: var(--text-secondary);
}

.project-features li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

/* Project Highlights */
.project-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* Strengths Grid */
.strengths-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.strength-item {
    background-color: var(--bg-color);
    padding: 1rem 1.5rem;
    border-radius: 6px;
    text-align: center;
    font-weight: 600;
    color: var(--text-color);
    box-shadow: 0 2px 6px var(--shadow);
    transition: all 0.3s ease;
}

.strength-item:hover {
    background-color: var(--secondary-color);
    color: var(--header-text);
    transform: scale(1.05);
}

/* Section intro text */
.section-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Examples Section */
.examples-notice {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    margin: 2rem 0;
    border: 2px dashed var(--border-color);
}

.examples-notice p {
    color: var(--text-secondary);
    margin: 0.5rem 0;
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.example-placeholder {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow);
}

.example-placeholder h4 {
    color: var(--text-color);
    margin: 0 0 1rem 0;
}

.example-placeholder ul {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Responsive adjustments for profile styles */
@media (max-width: 768px) {
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .strengths-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .project-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .project-header h3 {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .skill-card {
        padding: 1.5rem;
    }
    
    .contact-item {
        padding: 1.5rem;
    }
    
    .experience-item {
        padding: 1.5rem;
    }
    
    .strengths-grid {
        grid-template-columns: 1fr;
    }
}