:root {
    --primary-color: #bf5700;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #ffffff;
    --bg-secondary: #f8f9fa;
    --border-color: #eaeaea;
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Lora', serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    margin: 0;
    padding: 0;
    color: var(--text-color);
    line-height: 1.8;
    background-color: var(--bg-color);
    font-size: 17px;
}

h1,
h2,
h3,
h4,
nav a {
    font-family: var(--font-heading);
    font-weight: 700;
    color: #111;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    text-decoration: underline;
}

p,
ul,
ol {
    margin-top: 0;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

nav {
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 40px;
}

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

.nav-logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: #000;
    text-decoration: none;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
}

.nav-links a {
    margin-left: 20px;
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 600;
}

.nav-links a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

main {
    display: block;
}

.home-page,
.blog-page,
.post-page {
    padding-bottom: 20px;
}

.profile-section {
    display: flex;
    gap: 40px;
    align-items: flex-start;
    margin-bottom: 60px;
}

.profile-img {
    width: 220px;
    height: 220px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

.profile-info h1 {
    margin: 0 0 10px;
    font-size: 2.5rem;
    letter-spacing: -0.5px;
}

.profile-role {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 20px;
    font-weight: 400;
}

.social-links {
    margin-top: 20px;
}

.social-links a {
    margin-right: 15px;
    font-size: 1.2rem;
    color: var(--text-light);
}

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

section {
    margin-bottom: 60px;
}

.section-title {
    font-size: 1.5rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 25px;
    letter-spacing: -0.5px;
}

.section-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
}

.section-link {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    white-space: nowrap;
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.info-box h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.info-box ul {
    padding-left: 20px;
    margin: 0;
}

.info-box li {
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.pub-list {
    list-style: none;
    padding: 0;
}

.pub-item {
    margin-bottom: 20px;
    display: block;
}

.pub-title {
    font-weight: 600;
    font-family: var(--font-heading);
    color: #000;
}

.pub-authors {
    color: var(--text-color);
}

.pub-venue {
    font-style: italic;
    color: var(--text-light);
}

.me {
    font-weight: 700;
    text-decoration: underline;
    color: #000;
}

.page-header {
    margin-bottom: 30px;
}

.page-title {
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.page-description {
    color: var(--text-light);
    max-width: 720px;
}

.blog-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 22px;
}

.blog-list-item {
    margin: 0;
}

.blog-card,
.recent-post-card {
    background: linear-gradient(180deg, #ffffff 0%, #fcfcfc 100%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 24px rgba(17, 17, 17, 0.04);
}

.blog-card {
    padding: 26px 28px;
}

.blog-card-title,
.recent-post-title {
    margin: 0 0 10px;
    letter-spacing: -0.3px;
}

.blog-card-title {
    font-size: 1.45rem;
}

.blog-card-title a,
.recent-post-title a {
    color: #111;
    text-decoration: none;
}

.blog-card-title a:hover,
.recent-post-title a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.blog-card-meta {
    margin-bottom: 10px;
    font-family: var(--font-heading);
    color: var(--text-light);
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.blog-card-excerpt,
.recent-post-excerpt {
    color: var(--text-light);
    margin-bottom: 0;
}

.blog-card-cta {
    margin-top: 16px;
    margin-bottom: 0;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
}

.recent-posts-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.recent-post-card {
    padding: 20px 22px;
}

.recent-post-title {
    font-size: 1.1rem;
}

.post {
    max-width: 760px;
}

.post-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.post-header h1 {
    margin: 0 0 8px;
    font-size: 2.3rem;
    letter-spacing: -0.5px;
}

.post-kicker,
.post-meta {
    font-family: var(--font-heading);
    color: var(--text-light);
    font-size: 0.95rem;
}

.post-kicker {
    margin-bottom: 10px;
}

.post-description {
    margin: 12px 0 0;
    max-width: 680px;
    color: var(--text-light);
    font-size: 1rem;
}

.post-content p,
.post-content ul,
.post-content ol {
    margin-bottom: 18px;
}

.post-content {
    font-size: 1.02rem;
}

.post-content h2,
.post-content h3 {
    margin-top: 32px;
    margin-bottom: 12px;
}

.post-content img {
    max-width: 100%;
    height: auto;
}

.post-content blockquote {
    margin: 24px 0;
    padding-left: 18px;
    border-left: 3px solid var(--border-color);
    color: var(--text-light);
}

.post-content mjx-container[jax="CHTML"][display="true"] {
    overflow-x: auto;
    overflow-y: hidden;
    padding: 4px 0;
}

footer {
    text-align: center;
    padding: 40px 0;
    color: var(--text-light);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    font-family: var(--font-heading);
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .nav-links {
        display: flex;
        gap: 12px 16px;
    }

    .nav-links a {
        margin-left: 0;
    }

    .profile-section {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .profile-img {
        width: 180px;
        height: 180px;
    }

    .info-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .section-heading {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .blog-card {
        padding: 22px 20px;
    }

    .blog-card-title {
        font-size: 1.28rem;
    }

    .recent-posts-list {
        grid-template-columns: 1fr;
    }

    .post-header h1,
    .page-title {
        font-size: 1.9rem;
    }
}

@media (max-width: 520px) {
    body {
        font-size: 16px;
    }

    nav {
        margin-bottom: 28px;
    }

    .container {
        padding: 0 16px;
    }

    .nav-links {
        gap: 10px 14px;
    }

    .profile-info h1 {
        font-size: 2rem;
    }

    .profile-role {
        font-size: 1rem;
    }

    .recent-post-card {
        padding: 18px 18px;
    }
}