/* Fonts: self-hosted, split so Czech letters load only when needed */
@font-face {
  font-family: "Fraunces";
  src: url("/assets/fonts/fraunces-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
  unicode-range: U+0000-00FF, U+2000-206F, U+20AC, U+2122;
}
@font-face {
  font-family: "Fraunces";
  src: url("/assets/fonts/fraunces-latin-ext.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+1E00-1E9F;
}
@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/inter-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
  unicode-range: U+0000-00FF, U+2000-206F, U+20AC, U+2122;
}
@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/inter-latin-ext.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+1E00-1E9F;
}

:root {
  --bg: #111;
  --surface: #222;
  --black: #000;
  --orange: #ff582d;
  --orange-deep: #dc4812;
  --glow: rgb(255 69 0 / 0.55);
  --text: #fff;
  --text-soft: #d6d6d6;
  --muted: #a3a3a3;
  --line: #333;

  --font-head: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --header-h: 4rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --measure: 42rem;
  --wide: 70rem;
  --radius: 12px;
}

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

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

body {
  margin: 0;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
}

main {
  flex: 1;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 650;
  line-height: 1.15;
  text-wrap: balance;
}

p {
  margin: 0;
}

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

img,
video {
  height: auto;
}

a {
  color: var(--orange);
}

ul,
ol {
  padding-left: 1.3rem;
}

hr {
  width: 100%;
  height: 3px;
  margin-block: 1.5rem;
  border: 0;
  border-radius: 3px;
  background: var(--orange);
}

:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: 4px;
}

[id] {
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

body:has(.weekly-nav) [id] {
  scroll-margin-top: calc(var(--header-h) + 4rem);
}

.accent {
  color: var(--orange);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--orange);
  color: var(--black);
  border-radius: 6px;
}

.skip-link:focus {
  top: 0.5rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
  padding-inline: var(--gutter);
  background: var(--black);
  border-bottom: 3px solid var(--orange);
}

.logo {
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 5.5vw, 1.8rem);
  font-weight: 750;
  color: var(--orange-deep);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.25s ease;
}

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

.menu-btn {
  display: grid;
  gap: 5px;
  place-content: center;
  width: 44px;
  height: 44px;
  margin-right: -8px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.menu-btn span {
  display: block;
  width: 26px;
  height: 3px;
  border-radius: 2px;
  background: var(--orange);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.site-nav {
  position: fixed;
  top: calc(var(--header-h) + 3px);
  right: 0;
  bottom: 0;
  width: min(20rem, 85vw);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem;
  overflow-y: auto;
  background: var(--black);
  border-left: 3px solid var(--orange-deep);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform 0.28s ease, visibility 0.28s;
}

.site-nav.is-open {
  transform: none;
  visibility: visible;
}

.nav-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 0.8rem 0;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--orange);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.social-links a {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: var(--orange);
  transition: color 0.2s ease;
}

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

.icon {
  width: 20px;
  height: 20px;
}

body.menu-open {
  overflow: hidden;
}

@media (min-width: 1100px) {
  .menu-btn {
    display: none;
  }

  .site-nav {
    position: static;
    width: auto;
    flex-direction: row;
    align-items: center;
    gap: 1.25rem;
    padding: 0;
    overflow: visible;
    background: none;
    border: 0;
    transform: none;
    visibility: visible;
    transition: none;
  }

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

  .nav-links a {
    padding: 0.2rem 0;
    font-size: 1rem;
    border-bottom: 3px solid transparent;
    transition: color 0.25s ease, border-color 0.25s ease;
  }

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

  body.menu-open {
    overflow: auto;
  }
}

/* Hero */
.home {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem var(--gutter) 2.5rem;
  text-align: center;
}

.home-img img {
  width: auto;
  max-height: min(58svh, 36rem);
  border-radius: 20px;
}

.typewriter h1 {
  font-size: clamp(2rem, 7vw, 3rem);
}

.typewriter p {
  min-height: 1.3em;
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 9vw, 4rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--orange);
}

.typewriter p::after {
  content: "";
  display: inline-block;
  width: 0.08em;
  height: 0.9em;
  margin-left: 0.08em;
  vertical-align: -0.08em;
  background: var(--orange);
  animation: blink-caret 0.9s step-end infinite;
}

@keyframes blink-caret {
  50% {
    opacity: 0;
  }
}

/* Project lists */
.projects {
  width: 100%;
  max-width: var(--wide);
  margin-inline: auto;
  padding: 2rem var(--gutter);
}

.projects > h2 {
  margin-bottom: 1.5rem;
  font-size: clamp(2rem, 6vw, 3rem);
  text-align: center;
  color: var(--orange);
}

.projects-intro {
  max-width: var(--measure);
  margin: 0 auto 2rem;
  color: var(--text-soft);
  text-align: center;
}

.projects-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr));
}

#latest .projects-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
}

.card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, opacity 0.5s ease;
}

.card-media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--black);
}

.card-media img,
.card-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.card-text {
  display: grid;
  gap: 0.5rem;
  padding: 1rem 1.15rem 1.25rem;
}

.card-text h3 {
  font-size: 1.35rem;
}

.card-text p {
  font-size: 0.97rem;
  line-height: 1.55;
  color: var(--text-soft);
}

.card--final {
  margin-bottom: 0.5rem;
}

.card--final .card-text h2 {
  font-size: clamp(1.6rem, 5vw, 2.4rem);
}

.card--final .card-text p {
  font-size: 1.1rem;
}

.badge {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.15rem 0.7rem;
  border-radius: 999px;
  background: var(--orange);
  color: var(--black);
  font-size: 0.85rem;
  font-weight: 600;
}

@media (hover: hover) {
  a.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 0 20px var(--glow);
  }

  a.card:hover .card-media img,
  a.card:hover .card-media video {
    transform: scale(1.03);
  }
}

@media (min-width: 760px) {
  .card--final {
    flex-direction: row;
    align-items: stretch;
  }

  .card--final .card-media {
    flex: 1.2;
    aspect-ratio: 16 / 10;
  }

  .card--final .card-text {
    flex: 1;
    align-content: center;
    padding: 2rem;
  }
}

/* About */
.about {
  padding: 3rem var(--gutter) 4rem;
}

.about-container {
  display: grid;
  gap: 2rem;
  max-width: 60rem;
  margin-inline: auto;
}

.about-img img {
  width: min(100%, 22rem);
  margin-inline: auto;
  border-radius: 20px;
}

.about-text {
  display: grid;
  gap: 1rem;
  color: var(--text-soft);
}

.about-text h2 {
  font-size: clamp(2rem, 6vw, 3rem);
  color: var(--orange);
}

@media (min-width: 760px) {
  .about-container {
    grid-template-columns: 22rem 1fr;
    align-items: center;
    gap: 3rem;
  }
}

/* Weekly number chips */
.weekly-nav {
  position: sticky;
  top: calc(var(--header-h) + 3px);
  z-index: 40;
  background: var(--black);
  border-bottom: 1px solid var(--orange);
}

.weekly-nav ol {
  display: flex;
  gap: 0.35rem;
  width: fit-content;
  max-width: 100%;
  margin: 0 auto;
  padding: 0.4rem var(--gutter);
  overflow-x: auto;
  list-style: none;
  scrollbar-width: none;
}

.weekly-nav ol::-webkit-scrollbar {
  display: none;
}

.weekly-nav a {
  display: grid;
  place-items: center;
  min-width: 44px;
  height: 36px;
  border-radius: 999px;
  color: var(--orange);
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

.weekly-nav--sections a {
  padding-inline: 0.8rem;
  white-space: nowrap;
}

.weekly-nav a.active {
  background: var(--orange);
  color: var(--black);
}

/* Project pages */
.project {
  width: 100%;
  max-width: var(--wide);
  margin-inline: auto;
  padding: 2.5rem var(--gutter) 3rem;
}

.project-header {
  max-width: 50rem;
  margin: 0 auto 2.5rem;
  text-align: center;
}

.project-header h1 {
  margin-bottom: 0.75rem;
  font-size: clamp(2.2rem, 8vw, 3.6rem);
  color: var(--orange);
}

.project-subtitle {
  font-size: clamp(1.1rem, 3vw, 1.35rem);
  color: var(--text-soft);
}

.project-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.content-group {
  display: contents;
}

.project-content > *,
.content-group > * {
  width: 100%;
  max-width: var(--measure);
  margin-inline: auto;
}

.project-content > .text-image-block,
.project-content > .text-image-block-reverse,
.project-content > .three-image-block,
.project-content > .image-block,
.project-content > .model-container,
.project-content > .video-window,
.project-content > .gallery,
.content-group > .text-image-block,
.content-group > .text-image-block-reverse,
.content-group > .three-image-block,
.content-group > .image-block,
.content-group > .model-container,
.content-group > .video-window {
  max-width: 60rem;
}

.project-content h3 {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--orange);
}

.project-content dl {
  margin: 0;
}

.project-content dt {
  margin-top: 1rem;
  font-weight: 600;
  color: var(--text);
}

.project-content dd {
  margin: 0 0 0.35rem;
}

/* Fixed-ratio embeds so they scale with the screen */
.model-container {
  display: grid;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--surface);
  border-radius: var(--radius);
}

.project-content .model-title {
  margin: 0;
  font-size: 1.4rem;
  text-align: center;
}

.model-frame,
.video-window {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--black);
}

.model-frame {
  aspect-ratio: 4 / 3;
}

.video-window {
  aspect-ratio: 16 / 9;
}

.model-frame iframe,
.video-window iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.download-box {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1rem;
  background: var(--surface);
  border: 1px solid var(--orange);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  transition: box-shadow 0.25s ease;
}

.download-box:hover {
  box-shadow: 0 0 14px var(--glow);
}

.download-icon {
  display: grid;
  flex: none;
  color: var(--orange);
}

.file-name {
  min-width: 0;
  overflow-wrap: anywhere;
}

.update-stamp {
  padding: 0.6rem 1.1rem;
  background: var(--orange);
  border-radius: var(--radius);
  color: #111;
}

.project-content .update-stamp h2 {
  margin: 0;
  font-size: clamp(1.3rem, 5vw, 1.8rem);
  color: #111;
}

.update-stamp a {
  color: #111;
}

.coming-soon {
  padding: 0.6rem 1.1rem;
  background: var(--surface);
  border-left: 4px solid var(--orange);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-soft);
}

.gallery {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
}

.gallery img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
}

.text-image-block img.thumb,
.text-image-block-reverse img.thumb {
  width: auto;
  margin-inline: auto;
}

.image-item img.narrow {
  max-width: 24rem;
  margin-inline: auto;
}

.video-link {
  text-align: center;
}

.project-content h2 {
  margin-top: 1rem;
  font-size: clamp(1.8rem, 6vw, 2.5rem);
  color: var(--orange);
}

.project-content a {
  text-underline-offset: 3px;
}

.text-block {
  display: grid;
  gap: 1rem;
  color: var(--text-soft);
}

.text-block ul,
.text-block ol {
  margin: 0;
}

.tools {
  padding: 1.15rem 1.35rem;
  background: var(--surface);
  border-left: 4px solid var(--orange);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.project-content .tools h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
}

.tools ul {
  margin: 0;
}

.tools h3 {
  margin: 1rem 0 0.5rem;
}

.text-image-block,
.text-image-block-reverse {
  display: grid;
  gap: 1.25rem;
  align-items: center;
}

.text-image-text {
  display: grid;
  gap: 1rem;
  color: var(--text-soft);
}

.text-image-block img,
.text-image-block-reverse img,
.image-block img,
.image-item img,
.image-item video {
  width: 100%;
  border-radius: var(--radius);
}

.image-block {
  text-align: center;
}

.three-image-block {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  align-items: start;
}

.caption {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  line-height: 1.45;
  color: var(--muted);
  text-align: center;
}

@media (min-width: 760px) {
  .text-image-block,
  .text-image-block-reverse {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

  .text-image-block-reverse > :first-child {
    order: 2;
  }
}

.prev-next {
  display: grid;
  gap: 0.75rem;
  max-width: var(--measure);
  margin: 3rem auto 0;
}

.prev-next a {
  display: block;
  padding: 0.85rem 1.1rem;
  background: var(--surface);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-head);
  font-size: 1.1rem;
  line-height: 1.3;
  text-decoration: none;
  transition: box-shadow 0.25s ease;
}

.prev-next a:hover {
  box-shadow: 0 0 14px var(--glow);
}

.prev-next small {
  display: block;
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--orange);
}

.prev-next .next {
  grid-column: -2;
  text-align: right;
}

@media (min-width: 640px) {
  .prev-next {
    grid-template-columns: 1fr 1fr;
  }
}

/* 404 */
.not-found {
  display: grid;
  gap: 0.75rem;
  max-width: var(--measure);
  margin-inline: auto;
  padding: 5rem var(--gutter);
  text-align: center;
}

.not-found-code {
  font-family: var(--font-head);
  font-size: clamp(4rem, 20vw, 7rem);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.not-found h1 {
  font-size: clamp(1.8rem, 6vw, 2.5rem);
}

/* Footer */
.site-footer {
  display: grid;
  justify-items: center;
  gap: 0.5rem;
  padding: 1.5rem var(--gutter);
  background: var(--black);
  border-top: 3px solid var(--orange);
  font-size: 0.95rem;
  text-align: center;
}

/* Reveal on scroll, only when JS is running */
.js .reveal {
  opacity: 0;
  transform: translateY(14px);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (hover: hover) {
  .js a.card.reveal.is-visible:hover {
    transform: translateY(-4px);
  }
}

@media print {
  .js .reveal {
    opacity: 1;
    transform: none;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}