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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #1a1a1a;
    background-color: #ffffff;
    line-height: 1.7;
    transition: background-color 0.3s, color 0.3s;
}

main {
    max-width: 600px;
    margin: 0 auto;
    padding: 40px 24px;
}

/* Controls */
.controls {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 8px;
    z-index: 100;
}

.controls button {
    background: #f0f0f0;
    border: 1px solid #ddd;
    border-radius: 20px;
    padding: 6px 14px;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

.controls button:hover {
    background: #e0e0e0;
}

/* Navigation */
nav {
    display: flex;
    justify-content: center;
    gap: 6px;
    padding: 20px 24px 0;
    max-width: 600px;
    margin: 0 auto;
    flex-wrap: wrap;
}

nav a {
    color: #888;
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.02em;
    padding: 6px 14px;
    border-radius: 100px;
    transition: color 0.2s, background-color 0.2s;
}

nav a:hover {
    color: #1a1a1a;
    background-color: #f0f0f0;
}

nav a.active {
    color: #1a1a1a;
    background-color: #f0f0f0;
    font-weight: 600;
}

/* Profile */
.profile {
    text-align: center;
    margin-bottom: 48px;
}

.profile-photo {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 24px;
}

h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.title {
    font-size: 16px;
    color: #666;
    transition: color 0.3s;
}

/* Page title (subpages) */
.page-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 32px;
}

/* Page content */
.page-content {
    margin-bottom: 48px;
}

.page-content p {
    margin-bottom: 16px;
    font-size: 16px;
    color: #333;
    transition: color 0.3s;
}

.page-content .intro {
    font-style: italic;
    color: #666;
    margin-bottom: 32px;
}

/* Entries (work, projects) */
.entry {
    margin-bottom: 32px;
}

.entry h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.entry-meta {
    font-size: 14px;
    color: #888;
    margin-bottom: 8px;
}

.entry ul {
    margin-left: 20px;
    margin-top: 8px;
}

.entry li {
    font-size: 15px;
    color: #333;
    margin-bottom: 6px;
    transition: color 0.3s;
}

.entry p {
    font-size: 15px;
    color: #333;
    transition: color 0.3s;
}

/* Achievements */
.achievement {
    margin-bottom: 24px;
}

.achievement h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.achievement p {
    font-size: 15px;
    color: #555;
    transition: color 0.3s;
}

/* Section headings */
.page-content h2 {
    font-size: 22px;
    font-weight: 700;
    margin-top: 40px;
    margin-bottom: 24px;
    padding-bottom: 8px;
    border-bottom: 1px solid #eee;
    transition: border-color 0.3s;
}

.page-content h2:first-child {
    margin-top: 0;
}

/* Bio */
.bio {
    margin-bottom: 48px;
}

.bio p {
    margin-bottom: 16px;
    font-size: 16px;
    color: #333;
    transition: color 0.3s;
}

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

/* Links */
.links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 48px;
}

.links a {
    color: #1a1a1a;
    text-decoration: none;
    font-size: 15px;
    border-bottom: 1px solid #ccc;
    padding-bottom: 2px;
    transition: border-color 0.2s, color 0.3s;
}

.links a:hover {
    border-color: #1a1a1a;
}

/* Footer */
footer {
    text-align: center;
    padding: 24px;
    font-size: 13px;
    color: #999;
    transition: color 0.3s;
}

/* =================== */
/* Dark mode           */
/* =================== */
body.dark {
    background-color: #121212;
    color: #e0e0e0;
}

body.dark .title {
    color: #aaa;
}

body.dark .bio p,
body.dark .page-content p,
body.dark .entry li,
body.dark .entry p {
    color: #ccc;
}

body.dark .page-content .intro {
    color: #999;
}

body.dark .achievement p {
    color: #aaa;
}

body.dark .entry-meta {
    color: #777;
}

body.dark .page-content h2 {
    border-color: #333;
}

body.dark nav a {
    color: #777;
}

body.dark nav a:hover {
    color: #e0e0e0;
    background-color: #2a2a2a;
}

body.dark nav a.active {
    color: #e0e0e0;
    background-color: #2a2a2a;
}

body.dark .links a {
    color: #e0e0e0;
    border-color: #555;
}

body.dark .links a:hover {
    border-color: #e0e0e0;
}

body.dark footer {
    color: #666;
}

body.dark .controls button {
    background: #2a2a2a;
    border-color: #444;
    color: #e0e0e0;
}

body.dark .controls button:hover {
    background: #3a3a3a;
}