:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f5f5f4;
  --color-bg-note: #f4efe6;
  --color-text: #171717;
  --color-muted: #6a6a6a;
  --color-accent: #c2511c;
  --color-accent-dark: #9a3c12;
  --color-border: #e3e3e1;
  --color-tape: rgba(232, 196, 120, 0.62);

  --font-sans: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "Cascadia Code", "SF Mono", monospace;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --space-9: 6rem;

  --radius: 2px;
  --radius-card: 4px;

  --width-wrap: 1120px;
  --width-prose: 46rem;
  --header-h: 4.25rem;

  --text-xs: 0.8rem;
  --text-sm: 0.925rem;
  --text-md: 1.0625rem;
  --text-lg: 1.25rem;
  --text-xl: 1.75rem;
  --text-2xl: 2.25rem;
}

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

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100%;
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

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

a {
  color: var(--color-accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

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

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

:focus:not(:focus-visible) {
  outline: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  background: var(--color-text);
  color: #fff;
  padding: 0.6rem 0.9rem;
  text-decoration: none;
}

.skip-link:focus {
  top: 0.75rem;
}

.wrap {
  width: min(100% - 2rem, var(--width-wrap));
  margin-inline: auto;
}

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: var(--space-4);
}

.site-logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.03em;
  color: var(--color-text);
  text-decoration: none;
}

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

.site-nav__list {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.98rem;
  padding-bottom: 0.15rem;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 1.35rem;
  height: 2px;
  background: var(--color-text);
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bars::before {
  top: -6px;
}

.nav-toggle__bars::after {
  top: 6px;
}

.hero img {
  display: block;
  width: 100%;
  height: min(62vw, 520px);
  object-fit: cover;
  object-position: center 55%;
}

.tagline {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 3.4vw, 2rem);
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.04em;
  line-height: 1.35;
  margin: var(--space-7) 0 var(--space-8);
}

.tagline span {
  color: var(--color-accent);
}

.section {
  padding: var(--space-8) 0;
}

.section--alt {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.section h2,
.related__title {
  font-size: var(--text-xl);
  margin: 0 0 var(--space-5);
}

.section__more {
  display: flex;
  justify-content: center;
  margin: var(--space-7) 0 0;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-5);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 0.9rem;
  align-items: center;
}

.filters__label,
.sort__label {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.filters__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.filter-pill,
.btn,
.sort select {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.filter-pill {
  padding: 0.42rem 0.7rem;
  cursor: pointer;
}

.filter-pill.is-active,
.filter-pill:hover {
  border-color: var(--color-accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.15rem;
  text-decoration: none;
  color: var(--color-text);
}

.btn:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}

.sort {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sort select {
  padding: 0.42rem 0.55rem;
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.85rem;
}

.article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.article-card {
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.article-card[hidden],
.note-card[hidden] {
  display: none;
}

/* Poznámky jen ve filtru Poznámky — ne ve Vše */
[data-article-list] .note-card {
  display: none;
}

[data-article-list][data-active-filter="poznamky"] .note-card {
  display: flex;
}

[data-article-list][data-active-filter="poznamky"] .article-card {
  display: none;
}

.article-card__image {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg-alt);
}

.article-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.article-card__body {
  padding: 1rem 1rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  flex: 1;
}

.article-card__meta,
.article__meta,
.article-card__read,
.article__read {
  font-size: var(--text-xs);
  color: var(--color-muted);
  margin: 0;
}

.article-card__cat,
.article__cat {
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.75rem;
  text-decoration: none;
}

.article-card__title {
  font-size: 1.15rem;
  margin: 0;
}

.article-card__title a,
.article-card__read a,
.project-card__title a,
.note-card__title a {
  color: var(--color-text);
  text-decoration: none;
}

.article-card__title a:hover,
.project-card__title a:hover,
.note-card__title a:hover,
.article-card__read a:hover,
.project-card__link a:hover {
  color: var(--color-accent-dark);
}

.article-card__excerpt,
.project-card__excerpt,
.note-card__excerpt {
  color: var(--color-muted);
  font-size: var(--text-sm);
  margin: 0;
}

.article-grid .note-card__excerpt {
  flex: 1;
  line-height: 1.55;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 14;
  overflow: hidden;
}

.note-card__excerpt strong {
  font-weight: 700;
  color: var(--color-text);
}

.article-card__read {
  margin-top: auto;
  padding-top: 0.5rem;
}

.empty-filter {
  color: var(--color-muted);
  text-align: center;
  padding: var(--space-6) 0;
}

.now-grid,
.project-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.15rem;
}

.project-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 1.15rem 1.15rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.project-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.project-card__icon {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-muted);
}

.project-card__title {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  margin: 0;
  font-weight: 600;
}

.project-card__now {
  font-size: var(--text-sm);
  margin: 0.2rem 0 0;
}

.project-card__link {
  margin: auto 0 0;
  padding-top: 0.7rem;
  font-size: var(--text-sm);
}

.project-card__link a {
  color: var(--color-text);
  text-decoration: none;
}

.status {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 0.18rem 0.4rem;
  border-radius: var(--radius);
}

.status--work {
  color: var(--color-muted);
  border-color: var(--color-border);
}

.note-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--color-bg-note);
  border: 1px solid #eadfce;
  padding: 1.5rem 1.25rem 1.3rem;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.03);
}

.article-grid .note-card {
  min-height: 20rem;
  padding-bottom: 2.1rem;
}

.note-card::before {
  content: "";
  position: absolute;
  top: -0.55rem;
  left: 50%;
  width: 4.2rem;
  height: 1.15rem;
  transform: translateX(-50%) rotate(-3deg);
  background: var(--color-tape);
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.04);
}

.note-card__kicker,
.note-page__kicker,
.project-page__kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 0.45rem;
}

.note-card__title {
  font-size: 1.05rem;
  margin: 0 0 0.5rem;
}

.note-card__meta {
  font-size: var(--text-xs);
  color: var(--color-muted);
  margin: 0.8rem 0 0;
}

.note-card__mark {
  position: absolute;
  right: 0.9rem;
  bottom: 0.7rem;
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  border: 1.5px solid var(--color-accent);
}

.note-card__mark::after {
  content: "";
  position: absolute;
  left: 0.22rem;
  bottom: 0.28rem;
  width: 0.6rem;
  height: 0.28rem;
  border-bottom: 1.5px solid var(--color-accent);
  border-radius: 0 0 0.6rem 0.6rem;
}

.intro {
  max-width: var(--width-prose);
}

.intro p {
  margin: 0 0 1rem;
}

.intro__more {
  margin: var(--space-5) 0 0;
}

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

.intro__more a:hover {
  color: var(--color-accent-dark);
}

.projects-intro {
  max-width: var(--width-prose);
  margin-bottom: 2rem;
}

.projects-intro p {
  margin: 0 0 0.75rem;
}

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

.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0 var(--space-5);
  font-size: var(--text-sm);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.site-footer__name {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  margin: 0 0 0.35rem;
}

.site-footer__tag,
.site-footer__note {
  color: var(--color-muted);
  margin: 0;
}

.site-footer__heading {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
  margin: 0 0 0.75rem;
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__list a,
.site-footer a {
  color: var(--color-text);
  text-decoration: none;
}

.site-footer__list a:hover,
.site-footer a:hover,
.text-link:hover {
  color: var(--color-accent-dark);
}

.site-footer__list li + li {
  margin-top: 0.35rem;
}

.origin {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  margin-top: 1.25rem;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.origin p {
  margin: 0;
}

.origin__stain {
  width: 2.1rem;
  height: 2.1rem;
  flex-shrink: 0;
  border-radius: 50%;
  border: 7px solid rgba(194, 81, 28, 0.28);
  transform: rotate(-12deg);
  margin-top: 0.15rem;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  margin-top: var(--space-7);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.8rem;
}

.site-footer__bottom p {
  margin: 0;
}

.page,
.article,
.note-page,
.project-page {
  padding: var(--space-7) 0 var(--space-9);
}

.page__header,
.article__header,
.note-page__header,
.project-page__header {
  width: min(100% - 2rem, var(--width-prose));
  margin: 0 auto var(--space-6);
}

.page__title,
.article__title,
.note-page__title,
.project-page__title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0.35rem 0 0.7rem;
}

.page__lead,
.project-page__lead {
  color: var(--color-muted);
  font-size: 1.15rem;
  margin: 0;
}

.article__cover {
  width: min(100% - 2rem, var(--width-wrap));
  margin: 0 auto var(--space-6);
}

.article__cover img {
  width: 100%;
  height: min(52vw, 420px);
  object-fit: cover;
  display: block;
}

.project-page__title-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
}

.project-block {
  width: min(100% - 2rem, var(--width-prose));
  margin: 0 auto var(--space-6);
}

.project-block h2 {
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
}

.tech-line {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-muted);
}

.related {
  width: min(100% - 2rem, var(--width-wrap));
  margin: var(--space-8) auto 0;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.series-nav {
  width: min(100% - 2rem, var(--width-prose));
  margin: var(--space-7) auto 0;
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.series-nav__label {
  margin: 0 0 var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

.series-nav__label a {
  color: inherit;
}

.series-nav__label a:hover {
  color: var(--color-text);
}

.series-nav__links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.series-nav__item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
  text-decoration: none;
  color: inherit;
}

.series-nav__item--next {
  text-align: right;
  justify-self: end;
}

.series-nav__item--empty {
  visibility: hidden;
}

.series-nav__dir {
  font-size: var(--text-sm);
  color: var(--color-muted);
}

.series-nav__title {
  font-weight: 600;
  line-height: 1.35;
}

.series-nav__item:hover .series-nav__title {
  text-decoration: underline;
}

.project-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.25rem;
}

.project-links a {
  font-weight: 600;
}

@media (max-width: 560px) {
  .series-nav__links {
    grid-template-columns: 1fr;
  }

  .series-nav__item--next {
    text-align: left;
    justify-self: stretch;
  }

  .series-nav__item--empty {
    display: none;
  }
}

.demo-banner {
  width: min(100% - 2rem, var(--width-prose));
  margin: 0 auto var(--space-5);
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  font-size: var(--text-sm);
}

.prose {
  width: min(100% - 2rem, var(--width-prose));
  margin: 0 auto;
  overflow-wrap: break-word;
}

.prose h2 {
  font-size: 1.4rem;
  margin: 2.1rem 0 0.7rem;
}

.prose h3 {
  font-size: 1.15rem;
  margin: 1.6rem 0 0.5rem;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1.1rem;
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
}

.prose li + li {
  margin-top: 0.3rem;
}

.prose blockquote {
  margin: 1.4rem 0;
  padding: 0.15rem 0 0.15rem 1rem;
  border-left: 3px solid var(--color-accent);
  color: var(--color-muted);
}

.prose blockquote p {
  margin: 0;
}

.prose blockquote p + p {
  margin-top: 0.45rem;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--color-bg-alt);
  padding: 0.1em 0.35em;
}

.prose pre {
  background: #f3f3f1;
  border: 1px solid var(--color-border);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.5;
}

.prose pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
}

.prose img {
  display: block;
  margin: 1.4rem 0;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: 2rem 0;
}

.highlight {
  margin: 0 0 1.2rem;
}

.highlight .k,
.highlight .kd,
.highlight .kn {
  color: var(--color-accent-dark);
}

.highlight .s,
.highlight .s1,
.highlight .s2 {
  color: #3f6b4a;
}

.highlight .c,
.highlight .c1,
.highlight .cm {
  color: #8a8a8a;
  font-style: italic;
}

.about-photo {
  width: min(100% - 2rem, var(--width-prose));
  margin: 0 auto var(--space-6);
}

.about-photo img {
  width: 100%;
  height: min(46vw, 340px);
  object-fit: cover;
  object-position: center 40%;
  display: block;
}

.contact-box {
  width: min(100% - 2rem, var(--width-prose));
  margin: 0 auto var(--space-6);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-5);
}

.contact-box a {
  font-family: var(--font-mono);
}

@media (min-width: 720px) {
  .article-grid {
    grid-template-columns: 1fr 1fr;
  }

  .now-grid,
  .project-list,
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .article-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .now-grid {
    grid-template-columns: 1fr 1fr 1fr minmax(220px, 0.95fr);
    align-items: stretch;
  }

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

  .site-footer__grid {
    grid-template-columns: 1.2fr 0.9fr 0.9fr 1.3fr;
  }

  .hero img {
    height: 520px;
  }
}

@media (max-width: 767px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 0.5rem 1rem 1.25rem;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    gap: 0;
  }

  .site-nav a {
    display: block;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav a.is-active {
    border-bottom-color: var(--color-accent);
  }

  .tagline {
    margin: var(--space-6) 0 var(--space-6);
  }

  .section {
    padding: var(--space-7) 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}