:root {
    --bg-color: #0f172a;
    --text-color: #f1f5f9;
    --text-secondary: #cbd5e1;
    --accent-color: #4ade80;
    --border-color: #334155;
    --hover-color: #1e293b;
}

[data-theme="light"] {
    --bg-color: #FFFFFF;
    --text-color: #1e293b;
    --text-secondary: #64748b;
    --accent-color: #22c55e;
    --border-color: #e2e8f0;
    --hover-color: #f8fafc;
}

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

body {
    font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    font-size: 14px;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Main layout */
.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

[data-theme="light"] header {
    background: rgba(254, 254, 254, 0.9);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    padding: 0 20px;
}

.logo {
    position: absolute;
    top: 12px;
    left: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
}

/* Theme toggle */
.theme-toggle {
    position: absolute;
    top: 14px;
    right: 20px;
    cursor: pointer;
    user-select: none;
}

.theme-toggle-track {
    width: 60px;
    height: 32px;
    background: var(--hover-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.theme-toggle-track::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent 0%, var(--accent-color) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.theme-toggle-thumb {
    width: 24px;
    height: 24px;
    background: var(--text-color);
    border-radius: 50%;
    position: absolute;
    top: 3px;
    left: 3px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.theme-icon {
    font-size: 12px;
    transition: all 0.3s ease;
}

/* Light theme toggle styles */
[data-theme="light"] .theme-toggle-track {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

[data-theme="light"] .theme-toggle-track::before {
    opacity: 1;
}

[data-theme="light"] .theme-toggle-thumb {
    transform: translateX(28px);
    background: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Hover effects */
.theme-toggle:hover .theme-toggle-track {
    transform: scale(1.05);
}

.theme-toggle:hover .theme-toggle-thumb {
    transform: scale(1.1);
}

[data-theme="light"] .theme-toggle:hover .theme-toggle-thumb {
    transform: translateX(28px) scale(1.1);
}

/* Active state */
.theme-toggle:active .theme-toggle-track {
    transform: scale(0.95);
}

.theme-toggle:active .theme-toggle-thumb {
    transform: scale(0.9);
}

[data-theme="light"] .theme-toggle:active .theme-toggle-thumb {
    transform: translateX(28px) scale(0.9);
}

.wallet-connect {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--hover-color);
    border-radius: 20px;
    text-decoration: none;
    color: var(--text-color);
    font-size: 14px;
    transition: background 0.2s ease;
}

.wallet-connect:hover {
    background: var(--accent-color);
    color: black;
}

.wallet-connect img {
    width: 20px;
    height: 20px;
    border-radius: 50%;
}

/* Main content */
main {
    padding-top: 80px;
    padding-bottom: 40px;
}

/* Profile section */
.profile {
    text-align: center;
    margin-bottom: 60px;
}

.profile-image {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto 24px;
    display: block;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    font-family: 'Inter', sans-serif;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
    font-weight: 400;
}

.eth-address {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 14px;
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

.eth-address:hover {
    text-decoration: underline;
}

/* Section styles */
section {
    margin-bottom: 60px;
}

h2 {
    font-size: 16px;
    font-weight: 400;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
    font-family: 'Inter', sans-serif;
}

h3 {
    font-size: 16px;
    font-weight: 400;
    margin-bottom: 6px;
    font-family: 'Inter', sans-serif;
}

p {
    color: var(--text-secondary);
    margin-bottom: 14px;
    font-size: 14px;
    font-weight: 400;
}

/* Skills */
.skills-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-category {
    padding: 0;
    background: none;
    border: none;
    border-radius: 0;
    transition: all 0.3s ease;
}

.skill-category:hover {
    border: none;
    transform: translateX(8px);
}

.skill-category h3 {
    margin-bottom: 12px;
    font-size: 14px;
    font-weight: 400;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.skill-category h3::before {
    content: '●';
    color: var(--accent-color);
    font-size: 12px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.skill-tag {
    display: inline-block;
    padding: 6px 12px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 400;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.skill-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent-color);
    transition: left 0.3s ease;
    z-index: -1;
}

.skill-tag.featured {
    background: transparent;
    color: var(--text-color);
    font-weight: 500;
    border-color: var(--accent-color);
}

.skill-tag:not(.featured):hover {
    border-color: var(--accent-color);
    color: var(--text-color);
}

.skill-tag:hover::before {
    left: 0;
}

/* Work experience */
.work-item {
    margin-bottom: 40px;
}

.work-meta {
    color: var(--text-secondary);
    font-size: 12px;
    margin-bottom: 4px;
    font-weight: 400;
}

.work-item h3 {
    font-size: 14px;
    font-weight: 400;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.work-company {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
}

.work-company:hover {
    text-decoration: underline;
}

.tech-stack {
    color: var(--text-secondary);
    font-size: 12px;
    font-style: italic;
    margin-top: 6px;
    font-weight: 400;
}

/* Projects */
.project-item {
    margin-bottom: 40px;
}

.project-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 12px;
}

.project-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(76, 161, 175, 0.18), rgba(196, 224, 229, 0.04));
    box-shadow: inset 0 0 0 1px var(--border-color);
    font-size: 22px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-icon:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: inset 0 0 0 1px var(--accent-color), 0 6px 12px rgba(0, 0, 0, 0.15);
}

.project-title {
    font-size: 14px;
    font-weight: 400;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.project-meta {
    color: var(--text-secondary);
    font-size: 12px;
    margin-bottom: 4px;
    font-weight: 400;
}

.project-image {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    margin-bottom: 10px;
}

.project-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
}

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

/* Links */
.links-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 300px;
}

.link-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-color);
    text-decoration: none;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.link-item:last-child {
    border-bottom: none;
}

.link-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.link-item:hover::before {
    width: 100%;
}

.link-item:hover {
    color: var(--accent-color);
    transform: translateX(8px);
}

.link-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.link-icon {
    font-size: 18px;
    min-width: 24px;
}

.link-details {
    display: flex;
    flex-direction: column;
}

.link-arrow {
    font-size: 16px;
    opacity: 0.6;
    transition: all 0.3s ease;
}

.link-item:hover .link-arrow {
    opacity: 1;
    transform: translateX(4px);
}

.link-title {
    font-weight: 600;
    margin-bottom: 4px;
    font-size: 14px;
}

.link-handle {
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 400;
}

/* Resume Download */
.resume-download {
    display: flex;
    justify-content: flex-start;
}

.resume-card {
    background: none;
    border: none;
    border-radius: 0;
    padding: 0;
    text-align: left;
    max-width: 400px;
    width: 100%;
    transition: all 0.3s ease;
    position: relative;
}

.resume-card:hover {
    border: none;
    transform: translateX(8px);
}

.resume-icon {
    font-size: 24px;
    margin-bottom: 12px;
    display: inline-block;
    margin-right: 8px;
}

.resume-card h3 {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.resume-card p {
    margin-bottom: 20px;
    line-height: 1.6;
    font-size: 14px;
    max-width: 350px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: none;
    color: var(--accent-color);
    text-decoration: none;
    padding: 8px 0;
    border-radius: 0;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--accent-color);
    position: relative;
    overflow: hidden;
}

.download-btn::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.download-btn:hover::before {
    width: 100%;
}

.download-btn:hover {
    background: none;
    transform: translateX(4px);
    color: var(--accent-color);
}

.download-icon {
    font-size: 14px;
    transition: transform 0.3s ease;
}

.download-btn:hover .download-icon {
    transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .header-content {
        padding: 0 16px;
    }
    
    .logo {
        left: 16px;
    }
    
    .theme-toggle {
        right: 16px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}