/* ============================================================
   knutmichael.com — site.css
   IBM Plex Sans + IBM Plex Mono
   Dark minimalist, precise, European
   ============================================================ */

/* ---- FONTS ---- */

@font-face {
    font-family: 'IBM Plex Sans';
    src: url('../fonts/IBMPlexSans-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'IBM Plex Sans';
    src: url('../fonts/IBMPlexSans-Medium.woff2') format('woff2');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'IBM Plex Sans';
    src: url('../fonts/IBMPlexSans-SemiBold.woff2') format('woff2');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'IBM Plex Mono';
    src: url('../fonts/IBMPlexMono-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'IBM Plex Mono';
    src: url('../fonts/IBMPlexMono-Medium.woff2') format('woff2');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

/* ---- TOKENS ---- */

:root {
    --bg:            #0a0a0a;
    --bg-raised:     #121212;
    --bg-hover:      #171717;
    --text-primary:  #ededed;
    --text-secondary:#9a9a9a;
    --text-tertiary: #6b6b6b;
    --border:        #1c1c1c;
    --border-hover:  #2e2e2e;
    --accent:        #8b1f1f;
    --accent-hover:  #a82626;
    --focus:         #8b1f1f;

    --sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --mono: 'IBM Plex Mono', 'SF Mono', Consolas, monospace;

    --content-width: 720px;
    --wide-width:    960px;
    --page-pad:      clamp(1.5rem, 5vw, 3rem);
}

/* ---- RESET ---- */

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

html {
    font-size: 17px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: var(--sans);
    font-weight: 400;
    line-height: 1.65;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ---- SKIP LINK ---- */

.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    background: var(--accent);
    color: #fff;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    z-index: 999;
    transition: top 0.1s;
}

.skip-link:focus {
    top: 1rem;
}

/* ---- LAYOUT ---- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}

.site-header .inner {
    max-width: var(--wide-width);
    margin: 0 auto;
    padding: 0 var(--page-pad);
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-footer {
    margin-top: auto;
    border-top: 1px solid var(--border);
}

.site-footer .inner {
    max-width: var(--wide-width);
    margin: 0 auto;
    padding: 2.5rem var(--page-pad);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1.5rem;
}

main {
    flex: 1;
    width: 100%;
}

.content-wrap {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--page-pad);
}

.wide-wrap {
    max-width: var(--wide-width);
    margin: 0 auto;
    padding: 0 var(--page-pad);
}

/* ---- NAV ---- */

.site-logo {
    font-family: var(--sans);
    font-weight: 500;
    font-size: 1rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    transition: color 0.15s;
}

.site-logo:hover {
    color: var(--text-primary);
}

.page-home .site-logo {
    visibility: hidden;
    pointer-events: none;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.site-nav a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding-bottom: 2px;
    position: relative;
    transition: color 0.15s;
}

.site-nav a:hover {
    color: var(--text-primary);
}

.site-nav a[aria-current="page"] {
    color: var(--text-primary);
}

.site-nav a[aria-current="page"]::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

/* ---- FOOTER ---- */

.footer-left {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.footer-name {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
}

.footer-copy {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    list-style: none;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.15s;
}

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

/* ---- TYPOGRAPHY ---- */

h1, h2, h3, h4 {
    font-family: var(--sans);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.015em;
    color: var(--text-primary);
}

h2 { letter-spacing: -0.01em; }
h3 { letter-spacing: 0; }

p {
    color: var(--text-primary);
}

p + p {
    margin-top: 1.25rem;
}

/* ---- HOME PAGE ---- */

.home-hero {
    padding: 5rem var(--page-pad) 3rem;
    max-width: var(--wide-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 3rem;
    align-items: start;
}

.home-hero .hero-text {
    min-width: 0;
}

.home-hero .hero-portrait {
    width: 200px;
}

.home-hero .hero-portrait img {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid var(--border);
}

@media (max-width: 720px) {
    .home-hero {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .home-hero .hero-portrait {
        width: 140px;
        order: -1;
    }
}

.home-body {
    max-width: var(--content-width);
    color: var(--text-secondary);
    font-size: 1.0625rem;
    line-height: 1.7;
}

.home-body h2 {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: -0.005em;
    margin: 0 0 1.5rem;
    line-height: 1.55;
}

.home-body h2 + p:first-of-type,
.home-body h2:first-child {
    margin-top: 0;
}

.home-body > h2 + p {
    color: var(--text-primary);
}

.home-body p + h2,
.home-body hr + h2 {
    margin-top: 2.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 1.25rem;
}

.home-body p {
    color: var(--text-secondary);
    margin-bottom: 1.1rem;
}

.home-body a {
    color: var(--text-primary);
    text-decoration: underline;
    text-decoration-color: var(--border-hover);
    text-underline-offset: 3px;
}

.home-body a:hover {
    text-decoration-color: var(--accent);
}

.home-body hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
}

.home-body em,
.home-body i {
    color: var(--text-tertiary);
    font-size: 0.9375rem;
}

.hero-text {
    max-width: 560px;
}

.hero-name {
    font-size: clamp(2.4rem, 5vw, 3.5rem);
    font-weight: 500;
    letter-spacing: -0.025em;
    line-height: 1.05;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.hero-tagline {
    font-size: 1.125rem;
    font-weight: 400;
    line-height: 1.55;
    color: var(--text-secondary);
    max-width: 480px;
    margin-bottom: 2rem;
}

.hero-links {
    display: flex;
    gap: 1.25rem;
    list-style: none;
    flex-wrap: wrap;
}

.hero-links a {
    font-family: var(--mono);
    font-size: 0.8125rem;
    font-weight: 400;
    color: var(--text-tertiary);
    letter-spacing: 0.03em;
    transition: color 0.15s;
}

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

.hero-portrait {
    flex-shrink: 0;
}

.hero-portrait img {
    width: 200px;
    height: auto;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    object-position: center top;
    filter: grayscale(20%);
    opacity: 0.92;
}

/* ---- HOME SECTIONS ---- */

.home-section {
    padding: 4rem var(--page-pad);
    max-width: var(--wide-width);
    margin: 0 auto;
    border-top: 1px solid var(--border);
}

.section-label {
    font-family: var(--mono);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 1.75rem;
}

.home-intro p {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 640px;
}

.home-intro p + p {
    margin-top: 1rem;
}

.focus-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
    list-style: none;
}

.focus-list li {
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--border);
    transition: border-color 0.15s, color 0.15s;
}

.focus-list li:hover {
    border-color: var(--border-hover);
    color: var(--text-secondary);
}

/* ---- ARTICLE LIST ---- */

.article-list {
    list-style: none;
    display: flex;
    flex-direction: column;
}

.article-list-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 1.5rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    transition: background 0.1s;
}

.article-list-item:first-child {
    border-top: 1px solid var(--border);
}

.article-list-item:hover .article-list-title {
    color: var(--text-primary);
}

.article-list-meta {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    align-items: flex-start;
}

.article-list-date {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-tertiary);
    letter-spacing: 0.03em;
    padding-top: 0.2rem;
    white-space: nowrap;
}

.article-list-body {
    display: flex;
    flex-direction: column;
}

.article-list-tag {
    font-family: var(--mono);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
}

.article-list-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.35;
    padding-bottom: 0.5rem;
    margin-bottom: 0.6rem;
    border-bottom: 1px solid var(--border);
    transition: color 0.15s, border-color 0.15s;
    letter-spacing: -0.005em;
}

.article-list-item:hover .article-list-title {
    border-bottom-color: var(--border-hover);
}

.article-list-excerpt {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    line-height: 1.55;
}

.see-all-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--mono);
    font-size: 0.8125rem;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    margin-top: 1.75rem;
    transition: color 0.15s;
}

.see-all-link:hover {
    color: var(--text-primary);
}

.see-all-link::after {
    content: '\2192';
}

/* ---- PAGE HEADER ---- */

.page-header {
    padding: 4rem var(--page-pad) 3rem;
    max-width: var(--content-width);
    margin: 0 auto;
}

.page-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.page-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 520px;
}

/* ---- ARTICLE SINGLE ---- */

.article-header {
    padding: 4rem var(--page-pad) 2.5rem;
    max-width: var(--content-width);
    margin: 0 auto;
}

.article-tag {
    font-family: var(--mono);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1rem;
    display: block;
}

.article-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.article-meta {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.article-meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.article-meta-label {
    font-family: var(--mono);
    font-size: 0.625rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-tertiary);
}

.article-meta-value {
    font-family: var(--mono);
    font-size: 0.8125rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.article-cover figcaption {
    margin-top: 0.65rem;
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    color: var(--text-tertiary);
    line-height: 1.5;
}

.article-cover {
    max-width: var(--content-width);
    margin: 0 auto 2.5rem;
    padding: 0 var(--page-pad);
}

.article-cover img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background: var(--bg-raised);
}

/* ---- ARTICLE BODY ---- */

.article-body {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--page-pad) 4rem;
}

.article-body .lead {
    font-size: 1.1875rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.article-body h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.article-body h3 {
    font-size: 1.1875rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.article-body p {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.article-body a {
    color: var(--text-primary);
    text-decoration: underline;
    text-decoration-color: var(--border-hover);
    text-underline-offset: 3px;
    transition: text-decoration-color 0.15s;
}

.article-body a:hover {
    text-decoration-color: var(--accent);
}

.article-body ul,
.article-body ol {
    padding-left: 1.4rem;
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
}

.article-body li {
    font-size: 1.0625rem;
    line-height: 1.7;
    margin-bottom: 0.35rem;
}

.article-body code {
    font-family: var(--mono);
    font-size: 0.875em;
    color: var(--text-primary);
    background: var(--bg-raised);
    padding: 0.15em 0.4em;
    border-radius: 2px;
}

.article-body pre {
    background: var(--bg-raised);
    border-left: 2px solid var(--accent);
    padding: 1.25rem 1.5rem;
    margin: 1.75rem 0;
    overflow-x: auto;
}

.article-body pre code {
    background: transparent;
    padding: 0;
    font-size: 0.875rem;
    line-height: 1.65;
    color: var(--text-secondary);
}

.article-body blockquote {
    border-left: 2px solid var(--border-hover);
    padding-left: 1.25rem;
    margin: 1.75rem 0;
    color: var(--text-secondary);
    font-style: italic;
}

.article-body hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 3rem 0;
}

.article-body figure,
.page-body figure {
    margin: 2rem 0;
}

.article-body figure img,
.page-body figure img {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid var(--border);
}

.article-body figcaption,
.page-body figcaption {
    margin-top: 0.65rem;
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    color: var(--text-tertiary);
    line-height: 1.5;
}

.page-body {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--page-pad);
}

.page-body p {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.page-body h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    margin: 2.5rem 0 0.85rem;
}

.page-body a {
    color: var(--text-primary);
    text-decoration: underline;
    text-decoration-color: var(--border-hover);
    text-underline-offset: 3px;
}

.page-body a:hover {
    text-decoration-color: var(--accent);
}

.page-body ul,
.page-body ol {
    padding-left: 1.4rem;
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
}

.page-body li {
    font-size: 1.0625rem;
    line-height: 1.7;
    margin-bottom: 0.35rem;
}

/* Article tags footer */
.article-tags {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    margin-top: 1rem;
}

.article-tags-label {
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-tertiary);
}

.article-tag-pill {
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    padding: 0.3rem 0.65rem;
    border: 1px solid var(--border);
    transition: border-color 0.15s, color 0.15s;
}

.article-tag-pill:hover {
    border-color: var(--border-hover);
    color: var(--text-secondary);
}

/* Related articles */
.related-articles {
    border-top: 1px solid var(--border);
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 3rem var(--page-pad) 4rem;
}

/* ---- ABOUT PAGE ---- */

.about-body {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--page-pad) 5rem;
}

.about-body p {
    font-size: 1.0625rem;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.about-body h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 2.5rem 0 0.75rem;
}

/* ---- CONTACT PAGE ---- */

.contact-body {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--page-pad) 5rem;
}

.contact-body p {
    font-size: 1.0625rem;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.contact-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
    transition: color 0.15s;
}

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

.contact-links a::before {
    content: '';
    display: inline-block;
    width: 1px;
    height: 14px;
    background: var(--accent);
    flex-shrink: 0;
}

/* ---- ARTICLES INDEX PAGE ---- */

.articles-index {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--page-pad) 5rem;
}

/* ---- FOCUS RING ---- */

:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 3px;
}

/* ---- RESPONSIVE ---- */

@media (max-width: 720px) {
    .home-hero {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        padding: 3rem var(--page-pad);
    }

    .hero-portrait {
        order: -1;
    }

    .hero-portrait img {
        width: 120px;
    }

    .hero-name {
        font-size: 2.25rem;
    }

    .article-list-item {
        grid-template-columns: 1fr;
        gap: 0.4rem;
    }

    .article-list-date {
        order: 1;
        padding-top: 0.5rem;
    }

    .article-list-body {
        order: 0;
    }

    .site-footer .inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .article-meta {
        gap: 1.25rem;
    }
}

@media (max-width: 480px) {
    .site-nav {
        gap: 1.25rem;
    }

    .home-section {
        padding: 2.5rem var(--page-pad);
    }
}