/* Colors and fonts */

:root {
    --color-dark: #333;
    --color-mid-gray: #666;
    --color-primary: #1F3DFF;
    --color-primary-light: #1F3DFF;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    --font-serif: 'Noto Serif', Georgia, Times, serif;
    --color-light-gray: #E0E0E0;
    --color-lightest-gray: #F0F0F0;
}

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

/* Header */

.header {
    height: 100px;
    background-color: #1F3DFF;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 50px;
}

.logo {
    font-family: 'Silkscreen', cursive;
    color: white;
    font-size: 1.5rem;
    -webkit-font-smoothing: none;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeSpeed;
    display: flex;
    align-items: center;
    height: 100%;
    line-height: 1;
}

.logo a {
    color: white;
    text-decoration: none;
}

.nav-link {
    padding: 10px;
    font-family: 'Silkscreen', cursive;
    color: white;
    text-decoration: none;
    -webkit-font-smoothing: none;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeSpeed;
    border: 2px solid transparent;
}

.nav-link:hover {
    border: 2px solid white;
}

/* Content */


@media (min-width: 851px) {
    .content {
        padding: 50px;
        max-width: 1200px;
        margin: 0 auto;
    }

    .post {
        width: 800px;
    }
}

@media (max-width: 850px) {
    .content {
        width: 100%;
        padding: 30px;
    }

    .post {
        width: 100%;
        max-width: 100%;
    }

}

/* Post */

.post-header {
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
}

.post-meta {
    width: 100%;
    max-width: 100%;
    font-size: 0.8rem;
    color: var(--color-mid-gray);
    margin-bottom: 1rem;
    display: flex;
    flex-wrap: wrap;
    text-transform: uppercase;
    align-items: center;
    gap: 0.3rem;
    letter-spacing: normal;
    font-family: var(--font-sans);
}

.post-meta a {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
}

.post-meta a:hover {
    color: var(--color-primary-light);
}

.post-meta .reading-time-inline {
    font-weight: 600;
    color: var(--color-dark);
}

.post-title {
    font-size: 3.5rem;
    font-weight: 500;
    line-height: 1.1;
    margin: 0 0 1rem 0;
    font-family: var(--font-sans);
    text-align: left;
    width: 100%;
    max-width: 100%;
}

.post-title a {
    color: var(--color-dark);
}

.post-excerpt {
    font-size: 1.5rem;
    line-height: 1.4;
    color: var(--color-mid-gray);
    margin: 0 0 0.75rem 0;
    font-family: var(--font-sans);
    text-align: left;
    width: 100%;
    max-width: 100%;
}

.post-content {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--color-text);
    letter-spacing: 0;
    font-weight: 400;
    position: relative;
    /* For positioning sidenotes */
}

.post-content p {
    margin: 0 0 1.75rem 0;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
    font-family: var(--font-sans);
    color: var(--color-dark);
    font-weight: 700;
}

.post-content h2 {
    font-size: 1.8rem;
    margin: 2.5rem 0 1rem;
    letter-spacing: -0.02em;
}

.post-content h3 {
    font-size: 1.5rem;
    margin: 2rem 0 0.75rem;
    letter-spacing: -0.02em;
}

.post-content h4 {
    font-size: 1.3rem;
    margin: 1.75rem 0 0.75rem;
    letter-spacing: -0.01em;
}

.post-content a {
    color: var(--color-primary-light);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-decoration-color: var(--color-primary-light);
    text-underline-offset: 2px;
    transition: color 0.2s ease;
}

.post-content a:hover {
    color: var(--color-primary);
    text-decoration-thickness: 2px;
}

.post-content ul,
.post-content ol {
    margin: 0 0 1.5rem 1.5rem;
    padding: 0;
}

.post-content li {
    margin-bottom: 0.5rem;
}

.post-content blockquote {
    border-left: 3px solid var(--color-primary);
    margin: 2rem 0;
    padding: 0 0 0 1.5rem;
    font-style: italic;
    font-size: 1.2rem;
    color: var(--color-mid-gray);
}

/* Code blocks */

pre {
    background-color: var(--color-lightest);
    border-radius: 5px;
    padding: 1.5rem;
    margin: 1.5rem 0 2.5rem;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    border: 1px solid var(--color-light-gray);
    white-space: pre-wrap;
    word-wrap: break-word;
}

code {
    font-family: 'Courier New', Courier, monospace;
}

p code,
li code {
    background-color: var(--color-lightest);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9em;
    border: 1px solid var(--color-light-gray);
}

/* Lists */

.post-content ol {
    list-style-type: decimal;
    margin: 0 0 1.75rem 1.5rem;
    padding: 0;
}

.post-content ul {
    list-style-type: disc;
    margin: 0 0 1.75rem 1.5rem;
    padding: 0;
}

.post-content li {
    margin-bottom: 0.5rem;
}

/* Images */

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

.post-content figure {
    text-align: center;
    margin: 1.5rem 0;
}

.post-content figcaption {
    font-size: 0.8rem;
    color: var(--color-mid-gray);
    font-family: var(--font-sans);
}

/* Tags */

.tags-container {
    margin-top: 2rem;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tags a {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    color: var(--color-primary);
    text-decoration: none;
    text-transform: uppercase;
    font-weight: 600;
    background-color: var(--color-lightest);
    padding: 0.5rem 0.5rem;
    border-radius: 3px;
    border: 1px solid var(--color-light-gray);
}

/* Footer */

.site-footer {
    background-color: var(--color-white);
    color: var(--color-dark-gray);
    padding: 2rem 4vw;
    margin-top: 1rem;
    border-top: 1px solid var(--color-light-gray);
}

.footer-content {
    max-width: var(--wide-width);
    font-family: var(--font-sans);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    font-size: 0.875rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    color: var(--color-dark-gray);
    text-decoration: none;
    font-size: 0.875rem;
}

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

/* Home */

.home-container {
    padding: 50px;
    width: 1200px;
    margin: 0 auto;
}

.main-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 80px;
}

.home-main {
    width: 100%;
}

.home-sidebar {
    width: 100%;
}

.featured-post {
    margin-bottom: 60px;
    padding-bottom: 0;
    border-bottom: none;
}

.post-meta-latest {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    color: var(--color-primary);
    display: block;
}

.date-label {
    color: var(--color-mid-gray);
    font-size: 0.75rem;
}

.featured-post-title {
    font-size: 3.5rem;
    font-weight: 500;
    line-height: 1.1;
    margin: 0 0 1rem 0;
    font-family: var(--font-sans);
    text-align: left;
    width: 100%;
    max-width: 100%;
}

.featured-post-title a {
    color: var(--color-dark);
    transition: color 0.3s ease;
    text-decoration: none;
}

.featured-post-title a:hover {
    color: var(--color-primary);
}

.featured-post-excerpt {
    font-size: 1.5rem;
    line-height: 1.4;
    color: var(--color-mid-gray);
    margin: 0 0 0.75rem 0;
    font-family: var(--font-sans);
    text-align: left;
    width: 100%;
    max-width: 100%;
}

.min-read {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--color-mid-gray);
    margin-top: 15px;
    display: block;
}

.post-meta-home {
    font-size: 0.75rem;
    color: var(--color-lighter-gray);
    margin-bottom: 15px;
    font-family: var(--font-sans);
    font-weight: 400;
}

.post-meta-home-date {
    color: var(--color-primary);
}

.post-meta-home a {
    color: var(--color-primary);
}

.post-meta-home a:hover {
    text-decoration: underline;
}

.more-posts-section {
    margin-top: 30px;
}

.section-title {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    margin-bottom: 30px;
    font-family: var(--font-sans);
    position: relative;
    color: var(--color-mid-gray);
}

.section-title::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    height: 1px;
    background-color: var(--color-light-gray);
    z-index: -1;
}

.section-title span,
.sidebar-title span {
    background-color: var(--color-white);
    padding: 0 2.5em 0 1em;
    margin-left: -1em;
    margin-right: -1em;
    position: relative;
    z-index: 2;
    display: inline-block;
    box-shadow: 0 0 0 2px var(--color-white);
    /* extra insurance for anti-aliasing */
}

.section-title::after,
.sidebar-title::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    height: 1px;
    background-color: var(--color-light-gray);
    z-index: -1;
}

.post-card {
    padding-bottom: 30px;
    border-bottom: none;
}

.post-card:last-child {
    border-bottom: none;
}

.post-card-title {
    font-size: 1.5rem;
    line-height: 1.3;
    margin: 0 0 15px 0;
    font-family: var(--font-sans);
    font-weight: 500;
}

.post-card-title a {
    color: var(--color-dark);
    text-decoration: none;
}

.post-card-excerpt {
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 15px;
    font-family: var(--font-sans);
    color: var(--color-mid-gray);
}

/* Sidebar styles */

.sidebar-section {
    margin-bottom: 40px;
}

.sidebar-title {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    margin-bottom: 15px;
    font-family: var(--font-sans);
    position: relative;
    color: var(--color-mid-gray);
    background-color: var(--color-white);
}

.about-section {
    display: flex;
    flex-direction: column;
}

.about-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.about-logo {
    width: 70px;
    height: 70px;
    background-color: var(--color-dark);
    border-radius: 50%;
    margin-right: 15px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-family: monospace;
    font-size: 16px;
    font-weight: bold;
}

.about-info {
    flex: 1;
}

.about-logo {
    color: white;
}

.about-section h4 {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.about-section p {
    font-size: 0.8rem;
    line-height: 1.6;
    margin-bottom: 15px;
    font-family: var(--font-sans);
    color: var(--color-mid-gray);
}

/* Subscribe form */

.subscribe-form {
    background-color: transparent;
    padding: 0;
    margin-top: 10px;
}

.subscribe-form p {
    font-size: 0.8rem;
    margin-bottom: 15px;
}

.email-form {
    display: flex;
    border: 1px solid var(--color-light-gray);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.email-form .mail-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-lighter-gray);
    pointer-events: none;
    transition: opacity 0.3s ease;
    width: 16px;
    height: 16px;
}

.email-form input:focus+.mail-icon,
.email-form input:not(:placeholder-shown)+.mail-icon {
    opacity: 0;
}

.email-form input[type="email"] {
    flex: 1;
    padding: 12px 15px 12px 35px;
    border: none;
    font-size: 0.9rem;
    background: transparent;
}

.email-form button {
    background-color: transparent;
    color: var(--color-primary);
    border: none;
    padding: 14px 10px;
    cursor: pointer;
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    position: absolute;
    right: 0;
}

.email-form button:hover {
    color: var(--color-primary-dark);
}

/* Post List (Index) Layout */
.post-list-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 50px
}

.post-list {
    display: flex;
    flex-direction: column;

}

.post-list-item {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    /* background: var(--color-white); */
    /* border-radius: 8px; */
    /* box-shadow: 0 2px 8px rgba(0,0,0,0.03); */
    padding: 2.5rem 2rem;
    gap: 1.5rem;
}

.post-list-meta {
    min-width: 160px;
    max-width: 160px;
    width: 140px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    color: var(--color-mid-gray);
    flex-shrink: 0;
    gap: 0.5rem;
}

.post-list-date,
.post-list-readtime {
    font-size: 0.8rem;
    color: var(--color-mid-gray);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 400;
    margin-bottom: 0.1rem;
}

.post-list-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-top: 0.3rem;
}

.post-list-excerpt-link {
    text-decoration: none;
}

.post-tag {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    padding: 0.16em 0.6em 0.18em 0.6em;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    border: 1px solid var(--color-light-gray);
    display: inline-block;
    transition: background 0.2s, color 0.2s;
    cursor: pointer;
    border-radius: 2px;
}

.post-tag a {
    color: var(--color-primary);
    text-decoration: none;
}

.post-tag:hover {
    color: var(--color-primary);
    text-decoration: none;
    border: 1px solid var(--color-primary);
}

.post-list-content {
    order: 1;
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-width: 0;
    padding-left: 0.5rem;
    gap: 0.2rem;
}

.post-list-excerpt,
.post-list-readtime {
    flex-basis: 100%;
    width: 100%;
    display: block;
}

.post-list-excerpt {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    color: var(--color-mid-gray);
    margin-bottom: 0;
    font-weight: 400;
    line-height: 1.5;
    margin-top: 0.2rem;
}

.post-list-readtime {
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--color-mid-gray);
    background: none;
    border: none;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: 0.5rem;
    font-family: var(--font-sans);
}

.post-list-image {
    order: 2;
    min-width: 180px;
    max-width: 220px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.post-list-image img {
    width: 200px;
    height: 120px;
    object-fit: contain;
    border-radius: 6px;
}

.post-list-row {
    display: flex;
    align-items: baseline;
    gap: 1.2rem;
}

.post-list-date {
    font-size: 0.8rem;
    color: var(--color-mid-gray);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 400;
    margin-bottom: 0;
    margin-right: 0.7rem;
    font-family: var(--font-sans);
    flex-shrink: 0;
    margin-top: 0.4rem;
}

.post-list-title {
    font-family: var(--font-sans);
    font-size: 2rem;
    font-weight: 500;
    color: var(--color-dark);
    margin-bottom: 0;
    line-height: 1.15;
    display: inline-block;
}

@media (max-width: 768px) {
    .post-list-container {
        max-width: 100%;
        padding: 30px;
    }

    .post-list-item {
        flex-direction: column;
        align-items: stretch;
        padding: 2rem 0.7rem;
        gap: 1.2rem;
    }

    .post-list-meta {
        min-width: 0;
        max-width: 100%;
        width: 100%;
        flex-direction: row;
        align-items: top;
        margin-right: 0;
        gap: 1.2rem;
        justify-content: flex-start;
        order: 1;
    }

    .post-list-image {
        min-width: 0;
        max-width: 100%;
        margin-top: 0.7rem;
        margin-bottom: 0.7rem;
        justify-content: center;
        display: flex;
        order: 2;
    }

    .post-list-image img {
        width: 100%;
        height: auto;
        max-width: 100%;
        margin: 0 auto;
        display: block;
    }

    .post-list-content {
        padding-left: 0;
        order: 3;
    }

    /* Post and static page typography */
    .post-title {
        font-size: 2.5rem;
    }

    .post-excerpt {
        font-size: 1.25rem;
    }

    .post-content {
        font-size: 1.1rem;
    }

    .post-content h2 {
        font-size: 1.6rem;
        margin: 2rem 0 0.75rem;
    }

    .post-content h3 {
        font-size: 1.3rem;
        margin: 1.75rem 0 0.75rem;
    }

    .post-content h4 {
        font-size: 1.1rem;
        margin: 1.5rem 0 0.75rem;
    }

    .post-content blockquote {
        font-size: 1.1rem;
        margin: 1.5rem 0;
    }

    /* Index page typography */
    .featured-post-title {
        font-size: 2.5rem;
    }

    .featured-post-excerpt {
        font-size: 1.25rem;
    }

    .post-card-title {
        font-size: 1.3rem;
    }

    .post-card-excerpt {
        font-size: 1rem;
    }

    .post-list-title {
        font-size: 1.5rem;
    }

    .post-list-excerpt {
        font-size: 0.9rem;
    }

    .post-list-date,
    .post-list-readtime {
        font-size: 0.7rem;
    }

    .post-meta,
    .post-meta-latest,
    .post-meta-home {
        font-size: 0.7rem;
    }

    .post-tag {
        font-size: 0.6rem;
        padding: 0.12em 0.5em 0.14em 0.5em;
    }

    .post-list-tags .post-tag {
        font-size: 0.6rem;
    }

    /* Footer mobile styles */
    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }

    .copyright {
        order: 2;
    }

    .social-links {
        order: 1;
    }
}

/* Math styles */

math[display="block"] {
    display: block;
    margin: 1em 0 1.5em 0;
    border-radius: 6px;
    text-align: center;
    font-weight: 500;
    font-size: 2em;
}

/* Inline math */
math[display="inline"] {
    display: inline;
}