/*
  Monospace layout — refined, aligned with zaneenders.com / the-monospace-web
*/

:root {
  color-scheme: light dark;

  --font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, "Cascadia Mono",
    Consolas, "Liberation Mono", monospace;
  --line-height: 1.2rem;
  --reading-line-height: 1.55rem;
  --border-thickness: 1px;
  --base-font-size: 16px;

  --font-weight-normal: 500;
  --font-weight-medium: 600;
  --font-weight-bold: 700;

  font-size: var(--base-font-size);
  font-family: var(--font-family);
  font-optical-sizing: auto;
  font-weight: var(--font-weight-normal);
  font-variant-numeric: tabular-nums lining-nums;
  word-wrap: break-word;
  overflow-wrap: break-word;

  --text-color: #0a0a0c;
  --text-color-alt: #6b6b73;
  --background-color: #ffffff;
  --background-color-alt: #ececef;

  --gray-1: #6b6b73;
  --gray-2: #9a9aa3;
  --gray-3: #c7c7cc;
  --gray-4: #d8d8dd;
  --gray-5: #e6e6ea;
  --gray-6: #f2f2f5;

  --mint: #00b8a9;
  --mint-strong: #009e91;
  --mint-15p: color-mix(in srgb, var(--mint) 15%, transparent);
  --mint-25p: color-mix(in srgb, var(--mint) 25%, transparent);
  --pink: #d627c4;
  --blue: #2563eb;
  --green: #16a34a;
  --orange: #ea580c;
  --indigo: #4f46e5;
  --cyan: #0891b2;

  --accent-focus: var(--cyan);
  --radius: 4px;
  --transition: 0.15s ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text-color: #d4d4d8;
    --text-color-alt: #8a8a93;
    --background-color: #0a0a0d;
    --background-color-alt: #15151a;

    --gray-1: #8a8a93;
    --gray-2: #6a6a73;
    --gray-3: #3a3a3e;
    --gray-4: #2c2c30;
    --gray-5: #222226;
    --gray-6: #18181c;

    --mint: #5eead4;
    --mint-strong: #2dd4bf;
    --mint-15p: color-mix(in srgb, var(--mint) 15%, transparent);
    --mint-25p: color-mix(in srgb, var(--mint) 22%, transparent);
    --pink: #e879f9;
    --blue: #93c5fd;
    --green: #86efac;
    --orange: #fdba74;
    --indigo: #c4b5fd;
    --cyan: #67e8f9;
  }
}

@media (min-width: 500px) {
  :root {
    font-size: calc(1.1 * var(--base-font-size));
  }
}

@media (min-width: 700px) {
  :root {
    font-size: calc(1.25 * var(--base-font-size));
  }
}

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

html {
  display: flex;
  width: 100%;
  margin: 0;
  padding: 0;
  flex-direction: column;
  align-items: center;
  background: var(--background-color);
  color: var(--text-color);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  position: relative;
  width: 100%;
  margin: 0;
  padding: calc(var(--line-height) * 1.5) 2ch calc(var(--line-height) * 2);
  max-width: calc(min(80ch, round(down, 100%, 1ch)));
  line-height: var(--line-height);
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

@media (min-width: 900px) {
  body {
    max-width: calc(min(100ch, round(down, 100%, 1ch)));
  }
}

@media (min-width: 1400px) {
  body {
    max-width: calc(min(110ch, round(down, 100%, 1ch)));
  }
}

@media screen and (max-width: 480px) {
  :root {
    font-size: 14px;
  }

  body {
    padding: var(--line-height) 1ch calc(var(--line-height) * 1.5);
  }
}

::selection {
  background: var(--mint-25p);
  color: var(--text-color);
}

:focus-visible {
  outline: 2px solid var(--accent-focus);
  outline-offset: 2px;
  border-radius: 1px;
}

#app {
  width: 100%;
  margin: 0;
  padding: 0;
}

/* --- Site header --- */

.app-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1ch;
  margin: 0 0 calc(var(--line-height) * 1.5);
  padding: 0;
  border: none;
}

.app-brand h1 {
  margin: 0;
  font-size: inherit;
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height);
  letter-spacing: -0.01em;
}

.app-brand-link {
  color: inherit;
  text-decoration: none;
}

.app-brand-link:hover h1 {
  text-decoration: underline;
  text-decoration-thickness: 3px;
  text-decoration-color: var(--mint);
  text-underline-offset: 3px;
}

.app-tagline {
  margin: 0;
  color: var(--text-color-alt);
  font-size: calc(0.9 * var(--base-font-size));
}

/* --- Navigation tabs --- */

.tab-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 1.75ch;
  margin: 0 0 calc(var(--line-height) * 1.5);
  padding: 0;
  border-bottom: 1px solid var(--gray-4);
}

.tab-bar * + * {
  margin-top: 0;
}

.tab {
  display: inline-block;
  font: inherit;
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height);
  padding: 0.5rem 0.1ch;
  margin-bottom: -1px;
  border: none;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--text-color-alt);
  cursor: pointer;
  white-space: nowrap;
  transition:
    color var(--transition),
    border-color var(--transition);
  -webkit-appearance: none;
}

.tab:hover {
  color: var(--text-color);
  border-bottom-color: var(--gray-3);
}

.tab[aria-selected="true"] {
  color: var(--text-color);
  border-bottom-color: var(--mint);
  font-weight: var(--font-weight-bold);
}

.tab[hidden] {
  display: none;
}

.tab-panels {
  display: grid;
  position: relative;
}

.tab-panels > .tab-panel {
  grid-area: 1 / 1;
  min-width: 0;
}

.tab-panel[aria-hidden="true"] {
  visibility: hidden;
  pointer-events: none;
  position: absolute;
  width: 100%;
}

/* --- Shared controls --- */

.auth-button,
.auth-form button {
  display: inline-block;
  font: inherit;
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height);
  padding: 0.4rem 1ch;
  border: 1px solid var(--gray-3);
  border-radius: var(--radius);
  background: var(--background-color);
  color: var(--text-color);
  cursor: pointer;
  white-space: nowrap;
  transition:
    border-color var(--transition),
    background-color var(--transition),
    color var(--transition);
  -webkit-appearance: none;
}

.auth-button:hover,
.auth-form button:hover {
  border-color: var(--mint);
  background: var(--mint-15p);
}

.auth-form button[type="submit"] {
  font-weight: var(--font-weight-bold);
  border-color: var(--mint);
  background: var(--mint-15p);
}

.auth-form button[type="submit"]:hover {
  background: var(--mint-25p);
  border-color: var(--mint-strong);
}

.text-link {
  font: inherit;
  padding: 0;
  border: none;
  background: none;
  color: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
  text-decoration-color: var(--mint);
  transition: text-decoration-color var(--transition);
}

.text-link:hover {
  text-decoration-color: var(--pink);
}

h2 {
  margin: calc(var(--line-height) * 2) 0 0;
  font-size: inherit;
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height);
  color: var(--blue);
}

/* --- Shared status --- */

.status {
  margin: 0;
  color: var(--text-color-alt);
  font-size: calc(0.9 * var(--base-font-size));
}

.hint {
  margin: 0;
  color: var(--text-color-alt);
  font-size: calc(0.9 * var(--base-font-size));
}

/* --- FIT viewer --- */

#demo-canvas {
  display: block;
  width: 100%;
  max-width: 800px;
  border: 1px solid var(--gray-4);
  border-radius: var(--radius);
  background: #080a0e;
  cursor: grab;
  touch-action: none;
  outline: none;
}

#demo-canvas:active {
  cursor: grabbing;
}

.canvas-stage {
  width: 100%;
  max-width: 800px;
}

/* --- Content lists --- */

.content-list-view,
.content-detail-view,
.articles-viewer,
.favorites-viewer,
.article-viewer {
  margin: 0;
}

.content-list-view * + *,
.content-detail-view * + * {
  margin-top: var(--line-height);
}

.content-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: calc(var(--line-height) * 1.5);
}

.content-list * + * {
  margin-top: 0;
}

.content-list-item {
  display: grid;
  gap: 0.3rem;
  padding-bottom: calc(var(--line-height) * 1.25);
  border-bottom: 1px solid var(--gray-5);
}

.content-list-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.content-list-date {
  margin: 0;
  font-size: calc(0.85 * var(--base-font-size));
  color: var(--text-color-alt);
}

.content-list-link {
  text-align: left;
  font: inherit;
  font-size: inherit;
  font-weight: var(--font-weight-bold);
  color: inherit;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
  text-decoration-color: var(--mint);
  transition: text-decoration-color var(--transition);
}

.content-list-link:hover {
  text-decoration-color: var(--pink);
}

.articles-viewer .content-list,
.favorites-viewer .content-list {
  gap: 0;
}

.articles-viewer .content-list-item,
.favorites-viewer .content-list-item {
  grid-template-columns: minmax(0, 1fr);
  column-gap: 2ch;
  row-gap: 0;
  align-items: baseline;
  gap: 0;
  padding: calc(var(--line-height) * 0.5) 0;
  border-bottom: 1px solid var(--gray-5);
}

.articles-viewer .content-list-item {
  display: flex;
  align-items: baseline;
  gap: 1.5ch;
}

.articles-viewer .content-list-item:last-child,
.favorites-viewer .content-list-item:last-child {
  border-bottom: 0;
}

.articles-viewer .content-list-date {
  order: 2;
  color: var(--text-color-alt);
  font-size: calc(0.85 * var(--base-font-size));
}

.articles-viewer .content-list-link {
  order: 1;
  text-align: left;
}

.favorites-viewer .content-list-link {
  text-align: left;
}

.articles-viewer .content-list-view * + *,
.articles-viewer .content-detail-view * + *,
.favorites-viewer .content-list-view * + *,
.favorites-viewer .content-detail-view * + * {
  margin-top: calc(var(--line-height) * 0.5);
}

.articles-viewer .content-detail-view > .content-title + .content-meta,
.articles-viewer .content-detail-view > .content-meta,
.favorites-viewer .content-detail-view > .content-title + .content-meta,
.favorites-viewer .content-detail-view > .content-meta {
  margin-top: calc(var(--line-height) * 0.35);
}

.articles-viewer .article-content,
.favorites-viewer .article-content {
  margin-top: calc(var(--line-height) * 0.75);
}

.articles-viewer .article-content * + *,
.favorites-viewer .article-content * + * {
  margin-top: calc(var(--line-height) * 0.75);
}

.articles-viewer .content-detail-view > .content-meta + .article-content,
.favorites-viewer .content-detail-view > .content-meta + .article-content {
  margin-top: calc(var(--line-height) * 0.75);
}

.articles-viewer .article-content h1,
.favorites-viewer .article-content h1 {
  line-height: 1.35;
  margin-top: 0;
}

.articles-viewer .article-content h2,
.articles-viewer .article-content h3,
.articles-viewer .article-content h4,
.articles-viewer .article-content h5,
.articles-viewer .article-content h6,
.favorites-viewer .article-content h2,
.favorites-viewer .article-content h3,
.favorites-viewer .article-content h4,
.favorites-viewer .article-content h5,
.favorites-viewer .article-content h6 {
  margin-top: var(--line-height);
}

.articles-viewer .article-content blockquote,
.articles-viewer .article-content pre,
.favorites-viewer .article-content blockquote,
.favorites-viewer .article-content pre {
  margin-top: calc(var(--line-height) * 0.75);
}

.content-title {
  margin: 0;
  font-size: inherit;
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height);
  letter-spacing: -0.01em;
}

.content-meta {
  margin: 0;
  color: var(--text-color-alt);
  font-size: calc(0.9 * var(--base-font-size));
}

.content-detail-view > .content-title + .content-meta,
.content-detail-view > .content-meta {
  margin-top: var(--line-height);
}

/* --- Article body --- */

.article-content {
  margin-top: calc(var(--line-height) * 1.5);
  line-height: var(--reading-line-height);
  max-width: 78ch;
}

.article-content * + * {
  margin-top: var(--line-height);
}

.article-content > :first-child {
  margin-top: 0;
}

.article-content p {
  line-height: var(--reading-line-height);
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
  margin: calc(var(--line-height) * 2) 0 0;
  font-weight: var(--font-weight-bold);
  line-height: var(--reading-line-height);
  letter-spacing: -0.01em;
}

.article-content h1 {
  color: var(--text-color);
  line-height: 1.35;
  margin-top: 0;
}

.article-content h2 {
  color: var(--blue);
}

.article-content h3 {
  color: var(--green);
}

.article-content h4 {
  color: var(--orange);
}

.article-content h5 {
  color: var(--indigo);
}

.article-content h6 {
  color: var(--pink);
}

.article-content blockquote {
  font-size: calc(0.9 * var(--base-font-size));
  font-style: italic;
  color: var(--text-color-alt);
  padding: 0 0 0 1.25ch;
  border-left: 2px solid var(--gray-3);
  margin-top: var(--line-height);
}

.article-content blockquote * + * {
  margin-top: 0;
}

.article-content pre {
  overflow-x: auto;
  padding: calc(0.6 * var(--line-height)) 1.25ch;
  border: 1px solid var(--gray-4);
  border-radius: var(--radius);
  background: var(--background-color-alt);
  margin-top: var(--line-height);
  font-size: calc(0.9 * var(--base-font-size));
  line-height: var(--line-height);
}

.article-content code {
  font-family: inherit;
  font-size: 0.95em;
}

.article-content a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
  text-decoration-color: var(--mint);
  transition: text-decoration-color var(--transition);
}

.article-content a:hover {
  text-decoration-color: var(--pink);
}

.article-content img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.article-content ul,
.article-content ol {
  padding-left: 2ch;
}

.article-content ul {
  list-style-type: square;
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--gray-4);
  margin: calc(var(--line-height) * 1.5) 0 0;
}

/* --- Auth pages --- */

.auth-page {
  width: 100%;
  margin: 0;
  padding: 0;
  max-width: 60ch;
}

.auth-page * + * {
  margin-top: var(--line-height);
}

.auth-page h1 {
  margin: 0;
  font-size: inherit;
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height);
  letter-spacing: -0.01em;
}

.auth-form {
  display: grid;
  gap: var(--line-height);
  margin-top: calc(var(--line-height) * 1.5);
}

.auth-form * + * {
  margin-top: 0;
}

.auth-form label {
  display: grid;
  gap: 0.4rem;
  font-size: calc(0.9 * var(--base-font-size));
  font-weight: var(--font-weight-medium);
  width: 100%;
}

.auth-form input[type="email"] {
  font: inherit;
  width: 100%;
  padding: 0.4rem 0.85ch;
  border: 1px solid var(--gray-3);
  border-radius: var(--radius);
  background: var(--background-color);
  color: var(--text-color);
  line-height: var(--line-height);
  transition:
    border-color var(--transition),
    box-shadow var(--transition);
  -webkit-appearance: none;
}

.auth-form input[type="email"]:focus {
  outline: none;
  border-color: var(--mint);
  box-shadow: 0 0 0 1px var(--mint);
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
  text-decoration-color: var(--mint);
  transition: text-decoration-color var(--transition);
}

a:hover {
  text-decoration-color: var(--pink);
}