/* CSS Variables for theming */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f8f8;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;
    --accent: #e07a3a;
    --border: #e5e5e5;
    --card-bg: #ffffff;
    --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    --transition: 0.3s ease;
}

[data-theme="dark"] {
    --bg-primary: #121212;
    --bg-secondary: #1a1a1a;
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;
    --accent: #e07a3a;
    --border: #2a2a2a;
    --card-bg: #1e1e1e;
    --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition), color var(--transition);
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3 {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 500;
    line-height: 1.3;
}

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

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    transition: background-color var(--transition), border-color var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 20px;
    font-weight: 600;
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 14px;
    color: var(--text-secondary);
}

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

.nav-social {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-social a,
.nav-social button {
    color: var(--text-muted);
    transition: color var(--transition);
}

.nav-social a:hover,
.nav-social button:hover {
    color: var(--accent);
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

[data-theme="light"] .moon { display: none; }
[data-theme="dark"] .sun { display: none; }

/* Hero Section */
.hero {
    padding: 160px 0 80px;
}

.hero-title {
    font-size: clamp(48px, 8vw, 72px);
    margin-bottom: 8px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.hero-location {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 48px;
}

.hero-content {
    max-width: 600px;
}

.hero-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.hero-content p:last-child {
    margin-bottom: 0;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 500px;
}

/* Work Section */
.work {
    background-color: var(--bg-secondary);
    transition: background-color var(--transition);
}

.work-grid {
    display: grid;
    gap: 24px;
    margin-bottom: 48px;
}

.work-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition),
                background-color var(--transition), border-color var(--transition);
}

.work-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .work-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.work-card-header {
    margin-bottom: 16px;
}

.work-year {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    background-color: var(--bg-secondary);
    padding: 4px 12px;
    border-radius: 20px;
    transition: background-color var(--transition);
}

.work-card-title {
    font-size: 24px;
    margin-bottom: 4px;
}

.work-card-role {
    font-size: 14px;
    color: var(--accent);
    margin-bottom: 12px;
}

.work-card-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.work-cta {
    text-align: center;
}

/* Button */
.btn {
    display: inline-block;
    padding: 14px 28px;
    background-color: var(--text-primary);
    color: var(--bg-primary);
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    transition: transform var(--transition), opacity var(--transition);
}

.btn:hover {
    transform: translateY(-1px);
    opacity: 0.9;
    color: var(--bg-primary);
}

/* Projects Section */
.interests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.interest-card {
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: border-color var(--transition), transform var(--transition);
}

.interest-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.interest-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.interest-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

.music-project {
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.music-project h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.music-project p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.music-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    color: var(--accent);
}

.music-link:hover {
    text-decoration: underline;
}

/* Featured Project */
.featured-project {
    background-color: var(--card-bg);
    border: 2px solid var(--accent);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 48px;
    transition: background-color var(--transition), border-color var(--transition);
}

.featured-project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.featured-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--bg-primary);
    background-color: var(--accent);
    padding: 6px 12px;
    border-radius: 20px;
}

.featured-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--accent);
    font-weight: 500;
}

.featured-link:hover {
    text-decoration: underline;
}

.featured-project-hero {
    text-align: center;
    margin-bottom: 32px;
}

.filebread-logo {
    width: 120px;
    height: auto;
    margin-bottom: 16px;
}

.featured-project-title {
    font-size: clamp(32px, 5vw, 42px);
    margin-bottom: 8px;
}

.featured-project-tagline {
    font-size: 18px;
    color: var(--text-secondary);
    font-style: italic;
}

.featured-project-content {
    margin-bottom: 32px;
}

.featured-project-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

.featured-project-content p:last-child {
    margin-bottom: 0;
}

.featured-project-content strong {
    color: var(--text-primary);
}

.featured-project-content code {
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 14px;
    background-color: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    transition: background-color var(--transition);
}

/* Tabs Layout for B2C/B2B */
.featured-project-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
}

.tab-section {
    padding: 24px;
    background-color: var(--bg-secondary);
    border-radius: 12px;
    transition: background-color var(--transition);
}

.tab-title {
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    transition: border-color var(--transition);
}

.tab-content p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.7;
}

.tab-content p:last-child {
    margin-bottom: 0;
}

.tab-content strong {
    color: var(--text-primary);
}

.tab-content code {
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 13px;
    background-color: var(--card-bg);
    padding: 2px 6px;
    border-radius: 4px;
    transition: background-color var(--transition);
}

.tab-highlight {
    font-weight: 500;
    color: var(--text-primary) !important;
    font-style: italic;
    margin-top: 16px !important;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.use-cases {
    background-color: var(--card-bg);
    padding: 16px;
    border-radius: 8px;
    margin-top: 8px !important;
    transition: background-color var(--transition);
}

.use-cases span {
    color: var(--accent);
    font-weight: 500;
}

@media (max-width: 768px) {
    .featured-project-tabs {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

.featured-project-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
    padding: 24px;
    background-color: var(--bg-secondary);
    border-radius: 12px;
    transition: background-color var(--transition);
}

.detail-block h4 {
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 8px;
}

.detail-block p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.featured-project-diff {
    margin-bottom: 32px;
}

.featured-project-diff h4 {
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.featured-project-diff ul {
    list-style: none;
}

.featured-project-diff li {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    transition: border-color var(--transition);
}

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

.featured-project-diff strong {
    color: var(--text-primary);
}

.featured-project-vision {
    font-size: 15px;
    color: var(--text-secondary);
    padding: 20px;
    border-left: 3px solid var(--accent);
    background-color: var(--bg-secondary);
    border-radius: 0 8px 8px 0;
    margin-bottom: 32px;
    transition: background-color var(--transition);
}

.featured-project-cta {
    text-align: center;
}

.btn-accent {
    background-color: var(--accent);
    color: #ffffff;
}

.btn-accent:hover {
    color: #ffffff;
}

/* Other Interests */
.other-interests {
    margin-top: 48px;
}

.subsection-title {
    font-size: 20px;
    margin-bottom: 24px;
    color: var(--text-secondary);
}

.interest-card h4 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 8px;
}

.interest-card a {
    color: var(--accent);
}

/* Contact Section */
.contact {
    text-align: center;
    padding: 100px 0;
}

.contact-text {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.contact-email {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(20px, 4vw, 28px);
    color: var(--text-primary);
    border-bottom: 2px solid var(--accent);
    padding-bottom: 4px;
    transition: color var(--transition);
}

.contact-email:hover {
    color: var(--accent);
}

/* Footer */
.footer {
    padding: 32px 0;
    border-top: 1px solid var(--border);
    text-align: center;
    transition: border-color var(--transition);
}

.footer p {
    font-size: 14px;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        gap: 20px;
    }

    .nav-links a {
        font-size: 13px;
    }

    .hero {
        padding: 120px 0 60px;
    }

    section {
        padding: 60px 0;
    }

    .work-card {
        padding: 24px;
    }

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

    .featured-project {
        padding: 28px;
    }

    .featured-project-details {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 12px 16px;
    }

    .nav-links {
        gap: 16px;
    }

    .container {
        padding: 0 16px;
    }
}