/* Minimal Styles inspired by yutatokoi.com */
:root {
    --bg-light: #ffffff;
    --bg-dark: #1a1a1a;
    --text-light: #333333;
    --text-dark: #e0e0e0;
    --accent: #0066cc;
    --border-light: #e0e0e0;
    --border-dark: #333333;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-light);
    background-color: var(--bg-light);
    transition: all 0.3s ease;
    font-size: 16px;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    padding: 40px 0 20px;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 40px;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 400;
    transition: color 0.3s ease;
}

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

.theme-toggle {
    cursor: pointer;
    font-size: 18px;
    color: var(--text-light);
    transition: color 0.3s ease;
}

.theme-toggle:hover {
    color: var(--accent);
}

/* Typography */
h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--text-light);
}

h2 {
    font-size: 20px;
    font-weight: 600;
    margin: 30px 0 15px;
    color: var(--text-light);
}

h2:first-of-type {
    margin-top: 20px;
}

/* Main Content */
.container {
    max-width: 100%;
}

.profile {
    margin-bottom: 40px;
}

.profile-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 30px;
    display: none;
}

.intro-text p {
    margin-bottom: 15px;
    line-height: 1.7;
}

.intro-text a {
    color: var(--accent);
    text-decoration: none;
}

.intro-text a:hover {
    text-decoration: underline;
}

.intro-text hr {
    margin: 30px 0;
    border: none;
    border-top: 1px solid var(--border-light);
}

/* Research Content */
.research-content p {
    margin-bottom: 15px;
    line-height: 1.7;
}

.research-content a {
    color: var(--accent);
    text-decoration: none;
}

.research-content a:hover {
    text-decoration: underline;
}

/* Updates Section */
.updates {
    margin-top: 40px;
    margin-bottom: 40px;
}

.updates h2 {
    margin-bottom: 20px;
}

.update-item {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    line-height: 1.7;
}

.update-date {
    flex-shrink: 0;
    font-weight: 600;
    color: var(--accent);
    min-width: 80px;
}

.update-content {
    flex: 1;
}

.update-content a {
    color: var(--accent);
    text-decoration: none;
}

.update-content a:hover {
    text-decoration: underline;
}

.paper-title {
    font-weight: 700;
    font-size: 15px;
    line-height: 1.5;
}

.paper-authors {
    margin-top: 2px;
    font-size: 14px;
    color: #666;
    line-height: 1.5;
}

.paper-venue {
    margin-top: 2px;
    font-size: 13px;
    color: #666;
    line-height: 1.5;
}

.paper-venue a {
    color: var(--accent);
    text-decoration: none;
}

.paper-venue a:hover {
    text-decoration: underline;
}

body.dark-mode .paper-authors,
body.dark-mode .paper-venue {
    color: #999;
}

/* Contact */
.contact {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-light);
}

.contact p {
    margin-bottom: 15px;
}

.contact a {
    color: var(--accent);
    text-decoration: none;
}

.contact a:hover {
    text-decoration: underline;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    color: var(--text-light);
    font-size: 20px;
    transition: color 0.3s ease;
}

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

/* Dark Mode */
body.dark-mode {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

body.dark-mode h1,
body.dark-mode h2 {
    color: var(--text-dark);
}

body.dark-mode header {
    border-bottom-color: var(--border-dark);
}

body.dark-mode .nav-links a {
    color: var(--text-dark);
}

body.dark-mode .theme-toggle {
    color: var(--text-dark);
}

body.dark-mode .intro-text hr {
    border-top-color: var(--border-dark);
}

body.dark-mode .contact {
    border-top-color: var(--border-dark);
}

body.dark-mode .social-links a {
    color: var(--text-dark);
}

/* Responsive */
@media (max-width: 600px) {
    body {
        padding: 0 15px;
    }
    
    header {
        padding: 30px 0 15px;
    }
    
    .nav-links {
        gap: 20px;
    }
    
    .nav-links a {
        font-size: 14px;
    }
    
    .profile-image {
        width: 100px;
        height: 100px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    h2 {
        font-size: 18px;
    }
    
    .update-item {
        flex-direction: column;
        gap: 5px;
    }
    
    .update-date {
        min-width: auto;
    }
}