:root {
    --mono: 'JetBrains Mono', monospace;
    --container: 900px;
    --nav-height: 64px;
    --radius: 6px;
    --transition: 0.2s ease;
    
    /* Light mode (default) */
    --bg: #fafafa;
    --bg-subtle: #f4f4f5;
    --bg-elevated: #ffffff;
    --text: #18181b;
    --text-muted: #52525b;
    --text-dim: #a1a1aa;
    --accent: #059669;
    --accent-subtle: rgba(5, 150, 105, 0.08);
    --border: #e4e4e7;
    --border-subtle: #f4f4f5;
}

[data-theme="dark"] {
    --bg: #0a0a0b;
    --bg-subtle: #111114;
    --bg-elevated: #18181c;
    --text: #fafafa;
    --text-muted: #71717a;
    --text-dim: #52525b;
    --accent: #00ffc8;
    --accent-subtle: rgba(0, 255, 200, 0.08);
    --border: #27272a;
    --border-subtle: #1f1f23;
}

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

::selection {
    background: var(--accent);
    color: var(--bg);
}

[data-theme="dark"] ::selection {
    background: var(--accent);
    color: #000;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--mono);
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background 0.3s, color 0.3s;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    z-index: 100;
    background: var(--bg);
    border-bottom: 1px solid var(--border-subtle);
    transition: background 0.3s, border-color 0.3s;
}

.nav-logo {
    display: flex;
    align-items: center;
}

.nav-logo-img {
    height: 28px;
    width: auto;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-links a {
    font-size: 12px;
    color: var(--text-muted);
    transition: color var(--transition);
}

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

.theme-toggle {
    padding: 8px;
    border-radius: var(--radius);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition), color var(--transition);
}

.theme-toggle:hover {
    background: var(--bg-subtle);
    color: var(--text);
}

.theme-toggle .icon-sun {
    display: none;
}

.theme-toggle .icon-moon {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

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

/* Main layout */
main {
    padding-top: var(--nav-height);
}

section {
    padding: 80px 0;
    min-height: auto;
    display: flex;
    align-items: center;
}

.section-grid {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 32px;
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: 32px;
}

.section-label {
    font-size: 12px;
    color: var(--text-dim);
    padding-top: 8px;
    border-top: 1px solid var(--border-subtle);
}

.section-content {
    width: 100%;
}

.section-title {
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 48px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 24px;
    height: 1px;
    background: var(--accent);
    transition: background 0.3s;
}

[data-theme="dark"] .section-title::after {
    background: var(--accent);
}

/* Hero */
.hero {
    min-height: 100vh;
    padding-top: 0;
    display: flex;
    align-items: center;
    position: relative;
}

.hero-grid {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 32px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-label {
    font-size: 12px;
    color: var(--accent);
    margin-bottom: 16px;
    letter-spacing: 0.1em;
    transition: color var(--transition);
}

[data-theme="dark"] .hero-label {
    color: #00ffc8;
}

.hero-name {
    font-size: 56px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    color: var(--text);
}

.hero-tagline {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 320px;
    transition: color 0.3s;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.btn {
    padding: 12px 24px;
    font-size: 12px;
    font-family: var(--mono);
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
}

.btn-ghost:hover {
    color: var(--text);
}

.hero-meta {
    display: flex;
    gap: 16px;
}

.meta-link {
    color: var(--text-dim);
    transition: color var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.meta-link:hover {
    color: var(--accent);
}

/* Terminal */
.hero-terminal {
    position: relative;
    z-index: 2;
}

.terminal-window {
    background: var(--bg-subtle);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    overflow: hidden;
    transition: background 0.3s, border-color 0.3s;
}

.terminal-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: 12px;
    transition: border-color 0.3s;
}

.terminal-buttons {
    display: flex;
    gap: 6px;
}

.terminal-buttons span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.terminal-buttons span:nth-child(1) { background: #f87171; }
.terminal-buttons span:nth-child(2) { background: #fbbf24; }
.terminal-buttons span:nth-child(3) { background: #4ade80; }

.terminal-path {
    font-size: 12px;
    color: var(--text-dim);
}

.terminal-body {
    padding: 20px;
    font-size: 13px;
}

.terminal-line {
    color: var(--text-muted);
    margin-bottom: 8px;
    transition: color 0.3s;
}

.prompt {
    color: var(--accent);
    margin-right: 8px;
    transition: color var(--transition);
}

[data-theme="dark"] .prompt {
    color: #00ffc8;
}

.terminal-output {
    color: var(--text);
    margin-bottom: 12px;
    white-space: pre-wrap;
    transition: color 0.3s;
}

.terminal-input-line {
    display: flex;
    align-items: center;
}

.cursor {
    color: var(--accent);
    animation: blink 1s step-end infinite;
    margin-left: 2px;
}

[data-theme="dark"] .cursor {
    color: #00ffc8;
}

.term-hidden {
    opacity: 0;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-decoration {
    position: absolute;
    top: 50%;
    right: 80px;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    gap: 16px;
    opacity: 0.15;
}

.deco-line {
    width: 120px;
    height: 1px;
    background: linear-gradient(90deg, var(--accent), transparent);
}

.deco-dot {
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.5); }
}

/* About */
.about-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
}

.about-text {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-muted);
}

.about-text p {
    margin-bottom: 20px;
    transition: color 0.3s;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.info-block {
    padding: 20px;
    background: var(--bg-subtle);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    transition: background 0.3s, border-color 0.3s;
}

.info-label {
    display: block;
    font-size: 11px;
    color: var(--text-dim);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.info-value {
    font-size: 14px;
    color: var(--text);
}

/* Skills */
.skills-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 40px;
}

.skill-label {
    font-size: 11px;
    color: var(--accent);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color var(--transition);
}

[data-theme="dark"] .skill-label {
    color: #00ffc8;
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    padding: 6px 14px;
    font-size: 12px;
    background: var(--bg-subtle);
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
    transition: all var(--transition);
}

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

/* Timeline */
.timeline {
    position: relative;
    padding-left: 24px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 3px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: var(--border-subtle);
    transition: background 0.3s;
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -24px;
    top: 8px;
    width: 7px;
    height: 7px;
    background: var(--bg);
    border: 1px solid var(--accent);
    border-radius: 50%;
    transition: background 0.3s, border-color 0.3s;
}

.timeline-card {
    padding: 24px;
    background: var(--bg-subtle);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    transition: background 0.3s, border-color 0.3s;
}

.timeline-card:hover {
    border-color: var(--border);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 8px;
    flex-wrap: wrap;
    gap: 8px;
}

.timeline-role {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.timeline-company {
    font-size: 12px;
    color: var(--accent);
    transition: color var(--transition);
}

[data-theme="dark"] .timeline-company {
    color: #00ffc8;
}

.timeline-period {
    font-size: 12px;
    color: var(--text-dim);
    margin-bottom: 16px;
    transition: color 0.3s;
}

.timeline-details li {
    font-size: 13px;
    color: var(--text-muted);
    padding-left: 16px;
    position: relative;
    margin-bottom: 6px;
    transition: color 0.3s;
}

.timeline-details li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--text-dim);
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.project-card {
    padding: 24px;
    background: var(--bg-subtle);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.project-card {
    padding: 0;
    overflow: hidden;
}

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

.project-image {
    width: 100%;
    height: 140px;
    background: var(--bg-elevated);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
    border-bottom: 1px solid var(--border-subtle);
    transition: background 0.3s, border-color 0.3s;
}

.project-name {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    padding: 20px 20px 0;
}

.project-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
    padding: 0 20px;
    transition: color 0.3s;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 0 20px;
    margin-bottom: 16px;
}

.project-tag {
    font-size: 11px;
    padding: 4px 10px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
    transition: background 0.3s, border-color 0.3s, color 0.3s;
}

.project-links {
    display: flex;
    gap: 12px;
    padding: 0 20px 20px;
    border-top: 1px solid var(--border-subtle);
    margin-top: auto;
}

.project-link {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-dim);
    padding: 8px 0;
    transition: color var(--transition);
}

.project-link:hover {
    color: var(--accent);
}

[data-theme="dark"] .project-tag {
    border-color: var(--border);
}

[data-theme="dark"] .project-links {
    border-color: var(--border-subtle);
}

/* Contact */
.contact .section-content {
    text-align: center;
}

.contact .section-title::after {
    left: 50%;
    transform: translateX(-50%);
}

.contact-text {
    font-size: 24px;
    color: var(--text-muted);
    margin-bottom: 40px;
    transition: color 0.3s;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 40px;
}

.contact-link {
    text-align: left;
}

.link-label {
    display: block;
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 4px;
    transition: color 0.3s;
}

.link-value {
    font-size: 14px;
    color: var(--text);
    transition: color var(--transition);
}

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

/* Footer */
.footer {
    padding: 32px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg);
    transition: background 0.3s, border-color 0.3s;
}

.footer-copy {
    font-size: 12px;
    color: var(--text-dim);
    transition: color 0.3s;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--text-dim);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition);
}

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

/* Responsive */
@media (max-width: 768px) {
    .nav {
        padding: 0 20px;
    }

    .nav-links {
        display: none;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .hero-name {
        font-size: 40px;
    }

    .hero-content {
        text-align: center;
    }

    .hero-tagline {
        max-width: 100%;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-meta {
        justify-content: center;
    }

    .hero-decoration {
        display: none;
    }

    .section-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .section-label {
        display: none;
    }

    .about-layout {
        grid-template-columns: 1fr;
        gap: 24px;
    }

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

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

    .contact-links {
        flex-direction: column;
        align-items: center;
        gap: 24px;
    }

    .footer {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .skills-layout {
        grid-template-columns: 1fr;
    }

    section {
        padding: 60px 0;
    }
}