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

:root {
    /* Dark Mode */
    --bg-primary: #1a1611;
    --bg-secondary: #2d2619;
    --bg-tertiary: #3d3325;
    --text-primary: #f5f2e8;
    --text-secondary: #d4c7a8;
    --text-muted: #a1956b;
    --accent: #7a8471;
    --accent-hover: #9ba88e;
    --accent-light: #b8c7a8;
    --border: #453d2a;
    --card-bg: #252016;
    --card-hover: #2d2619;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 8px 25px -5px rgba(0, 0, 0, 0.4);
    --brown-100: #8b7355;
    --brown-200: #6d5a42;
    --brown-300: #5a4a35;
    --green-100: #9ba88e;
    --green-200: #7a8471;
    --green-300: #5d6b54;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Mode */
[data-theme="light"] {
    --bg-primary: #faf8f3;
    --bg-secondary: #f5f1e8;
    --bg-tertiary: #ede6d7;
    --text-primary: #2d2619;
    --text-secondary: #5a4a35;
    --text-muted: #8b7355;
    --accent: #7a8471;
    --accent-hover: #5d6b54;
    --accent-light: #9ba88e;
    --border: #d4c7a8;
    --card-bg: #ffffff;
    --card-hover: #f9f6f0;
    --shadow: 0 4px 6px -1px rgba(45, 38, 25, 0.1), 0 2px 4px -1px rgba(45, 38, 25, 0.06);
    --shadow-hover: 0 8px 25px -5px rgba(45, 38, 25, 0.15);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    scroll-behavior: smooth;
    transition: var(--transition);
}

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

/* nav */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--bg-primary);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 1rem 0;
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

.nav-links a:hover {
    color: var(--accent);
    transform: translateY(-1px);
    transition: var(--transition);
}

/* hero */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
}

.hero-section .container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 4rem;
    align-items: center;
}

.hero-name {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-description a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.hero-description a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--card-bg);
    border-radius: 8px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.social-links a:hover {
    background-color: var(--accent);
    color: white;
    transform: translateY(-2px);
}

.hero-image {
    display: flex;
    justify-content: center;
}

.profile-placeholder {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    border-radius: 50%;
    opacity: 0.8;
}

/* experience */
.experience-section {
    padding: 6rem 0;
    background-color: var(--bg-secondary);
}

.experience-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
}

/* jobs tabs */
.jobs {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    gap: 3rem;
    align-items: flex-start;
}

.jobs-tabs {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 120px;
    list-style: none;
}

.jobs-tabs::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 2px;
    height: 100%;
    background-color: var(--border);
    border-radius: 2px;
}

.jobs-tab {
    display: flex;
    align-items: center;
    width: 100%;
    height: 42px;
    padding: 0 20px 2px;
    border: none;
    background-color: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 13px;
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
    position: relative;
    border-left: 2px solid transparent;
    white-space: nowrap;
}

.jobs-tab:hover {
    background-color: var(--card-hover);
    color: var(--accent);
}

.jobs-tab:focus {
    outline: none;
    background-color: var(--card-hover);
}

.jobs-tab.active {
    color: var(--accent);
    background-color: rgba(122, 132, 113, 0.1);
    border-left-color: var(--accent);
}

.jobs-tab.active:focus {
    background-color: rgba(122, 132, 113, 0.1);
}

.jobs-content {
    flex: 1;
    min-height: 340px;
}

.jobs-panel {
    display: none;
}

.jobs-panel.active {
    display: block;
    animation: fadeIn 0.25s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.jobs-panel h3 {
    margin-bottom: 2px;
    font-size: 22px;
    font-weight: 500;
    line-height: 1.3;
    color: var(--text-primary);
}

.jobs-panel .company a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

.jobs-panel .company a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.jobs-range {
    margin-bottom: 25px;
    color: var(--text-muted);
    font-family: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
    font-size: 13px;
    font-weight: 400;
}

.jobs-panel ul {
    padding-left: 20px;
    list-style: none;
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.3;
}

.jobs-panel li {
    position: relative;
    padding-left: 10px;
    margin-bottom: 10px;
}

.jobs-panel li::before {
    content: '▹';
    position: absolute;
    left: -15px;
    color: var(--accent);
    font-size: 14px;
    line-height: 18px;
}

.job-position {
    margin-bottom: 40px;
}

.job-position:last-of-type {
    margin-bottom: 25px;
}

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

.tech-tags span {
    background-color: var(--accent);
    color: var(--bg-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid transparent;
}

.tech-tags span:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

/* Projects Section */
.projects-section {
    padding: 6rem 0;
}

.projects-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.projects-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
}

.view-all-btn {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border: 1px solid var(--accent);
    border-radius: 6px;
    transition: var(--transition);
    font-size: 0.9rem;
}

.view-all-btn:hover {
    background-color: var(--accent);
    color: var(--bg-primary);
    transform: translateY(-1px);
}

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

.project-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.project-image {
    height: 200px;
    overflow: hidden;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, var(--accent), var(--accent-hover));
    opacity: 0.6;
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.tech-tags {
    margin-bottom: 1.5rem;
}

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

.project-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--bg-primary);
    border-radius: 6px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.project-links a:hover {
    background-color: var(--accent);
    color: white;
}


/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .hero-section .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .profile-placeholder {
        width: 200px;
        height: 200px;
    }
    
    .jobs {
        flex-direction: column;
        gap: 2rem;
    }
    
    .jobs-tabs {
        flex-direction: row;
        overflow-x: auto;
        width: 100%;
        margin-bottom: 1rem;
    }
    
    .jobs-tabs::before {
        top: auto;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 2px;
    }
    
    .jobs-tab {
        min-width: 120px;
        height: 48px;
        border-left: none;
        border-bottom: 2px solid transparent;
        justify-content: center;
    }
    
    .jobs-tab.active {
        border-left: none;
        border-bottom-color: var(--accent);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .footer .container {
        flex-direction: column;
        text-align: center;
    }
}

/* Theme Toggle */
.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    position: relative;
}

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

.theme-toggle:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.theme-toggle-icon {
    position: relative;
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
}

.sun-icon,
.moon-icon {
    position: absolute;
    top: 0;
    left: 0;
    transition: var(--transition);
}

.sun-icon {
    opacity: 0;
    transform: rotate(180deg) scale(0.8);
}

.moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="light"] .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="light"] .moon-icon {
    opacity: 0;
    transform: rotate(-180deg) scale(0.8);
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* High Contrast Support */
@media (prefers-contrast: high) {
    :root {
        --border: #ffffff;
        --text-secondary: #ffffff;
    }
    
    [data-theme="light"] {
        --border: #000000;
        --text-secondary: #000000;
    }
}

/* Focus Management */
*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}


@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .nav-links {
        display: flex;
        gap: 1rem;
    }
    
    .nav-right {
        gap: 1rem;
    }
    
    .theme-toggle {
        min-width: 40px;
        min-height: 40px;
        padding: 0.4rem;
    }
    
    .social-links a {
        width: 40px;
        height: 40px;
    }
    
    .project-content {
        padding: 1rem;
    }
}