/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #000000;
    --bg-secondary: #111111;
    --bg-alt: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #e5e5e5;
    --text-muted: #a0a0a0;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --border: #333333;
    --card-bg: #0a0a0a;
    --code-bg: #111111;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --border-radius: 0.5rem;
    --border-radius-sm: 0.25rem;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-alt: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: #e2e8f0;
    --card-bg: #ffffff;
    --code-bg: #f8fafc;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header and navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    backdrop-filter: blur(8px);
    background-color: rgba(var(--bg-primary), 0.95);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.nav-brand h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.5rem;
    cursor: pointer;
    font-size: 1.25rem;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--bg-alt);
    border-color: var(--accent);
}

/* Header and navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    transition: box-shadow 0.3s ease;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand h1 {
    color: var(--accent);
    font-size: 1.5rem;
    font-weight: 700;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 0.5rem;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background: var(--bg-secondary);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero section */
.section {
    padding: 5rem 0;
}

.section-alt {
    background-color: var(--bg-secondary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
}

.hero {
    padding: 5rem 0;
    text-align: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    line-height: 1.6;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
}

.hero-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.highlight-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.highlight-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.highlight-card h3 {
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.highlight-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

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

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

/* About section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.open-to {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 2rem;
    margin-top: 2rem;
}

.open-to h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.open-to p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.open-to a {
    color: var(--accent);
    text-decoration: none;
}

.open-to a:hover {
    text-decoration: underline;
}

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

.skill-category {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 2rem;
}

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

.skill-category ul {
    list-style: none;
}

.skill-category li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}

.skill-category li:last-child {
    border-bottom: none;
}

/* Project sections */
.project-section {
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border);
}

.project-section h4 {
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-section p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.project-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.project-section li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.5;
    border-bottom: 1px solid var(--border);
}

.project-section li:last-child {
    border-bottom: none;
}

.project-section li::before {
    content: "•";
    color: var(--accent);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.project-section li strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Project status special styling */
.project-status strong {
    color: var(--accent);
}

.project-status em {
    color: var(--text-muted);
    font-style: italic;
}

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

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.project-card h3 {
    color: var(--accent);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.project-card h3 a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

.project-card h3 a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.project-subtitle {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.project-card p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1.5rem 0;
}

.tag {
    background: var(--accent);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

.project-status {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
}

.project-images {
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border);
}

.project-images h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: 600;
}

.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.image-gallery img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    border: 1px solid var(--border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.image-gallery img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.image-note {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-style: italic;
    text-align: center;
    margin-top: 1rem;
}

.image-note code {
    background: var(--bg-tertiary);
    padding: 0.2rem 0.4rem;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-mono);
    color: var(--accent);
}

/* Roles section */
.roles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.role-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.role-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.role-card h3 {
    color: var(--accent);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.role-summary {
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.role-section {
    margin-bottom: 1.5rem;
}

.role-section h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.role-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.role-section li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.5;
}

.role-section li::before {
    content: "•";
    color: var(--accent);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.role-titles {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

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

.skill-badge {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 0.375rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.skill-badge:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* Experience section */
.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
}

.experience-category h3 {
    color: var(--text-primary);
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.experience-item {
    margin-bottom: 2.5rem;
}

.experience-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.experience-org {
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.experience-date {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.experience-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Why Me section */
.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.why-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.why-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.why-item h3 {
    color: var(--accent);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.why-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Contact section */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-info p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.contact-method,
.contact-open,
.contact-notes {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.contact-method h3,
.contact-open h3,
.contact-notes h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.contact-method a {
    color: var(--accent);
    text-decoration: none;
}

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

.contact-open p,
.contact-notes li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.contact-notes ul {
    list-style: none;
}

/* Footer */
.footer {
    background-color: var(--bg-alt);
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    text-align: center;
}

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

/* Responsive design */
@media (max-width: 768px) {
    .nav {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-meta {
        flex-direction: column;
        gap: 0.5rem;
        align-items: center;
    }

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

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

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

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

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

    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero {
        padding-top: 6rem;
        padding-bottom: 3rem;
    }

    .section {
        padding: 3rem 0;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .nav-links {
        display: none;
    }
}