/* Dink Deck — the tutorial page.

   Built by docs/build-landing-guide.mjs in the app repo. Everything here uses
   the tokens styles.css already defines, so the page cannot drift away from
   the rest of the site: change a colour there and this follows.

   Only the pieces the landing page has no equivalent for live here — a step,
   a device frame, and the panel that opens a screenshot big enough to read. */

.tut-hero {
  padding-bottom: 40px;
}

.tut-facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 34px;
}

.tut-facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.tut-facts b {
  font-family: var(--font-mono);
  font-size: 17px;
  font-variant-numeric: tabular-nums;
}

.tut-facts span {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

/* ---------- chapter rail ---------- */

.tut-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in oklab, var(--background) 88%, transparent);
  backdrop-filter: blur(14px);
  border-block: 1px solid var(--border);
}

.tut-nav ol {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 8px 0;
  overflow-x: auto;
  scrollbar-width: thin;
}

.tut-nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 7px 13px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted-foreground);
}

.tut-nav a i {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 12px;
}

.tut-nav a:hover {
  background: var(--card);
  color: var(--foreground);
}

/* A track opening. Loud, because it is the one place the reader has to
   notice they have crossed from one audience to the other. */

.tut-trackhead {
  margin-top: clamp(56px, 8vw, 92px);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 2px solid var(--lime-ink);
  max-width: 60ch;
}

.tut-trackhead__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4vw, 34px);
  letter-spacing: -0.02em;
  color: var(--lime-ink);
  margin: 0;
}

.tut-trackhead__blurb {
  margin: 10px 0 0;
  color: var(--muted-foreground);
  line-height: 1.62;
}

.tut-nav__track {
  font-family: var(--font-display);
  color: var(--lime-ink) !important;
  text-transform: uppercase;
  font-size: 11px !important;
  letter-spacing: 0.14em;
}

/* ---------- the read ---------- */

.tut-body {
  padding-bottom: 40px;
}

.tut-body h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}

.tut-intro {
  padding: 48px 0 0;
  max-width: 60ch;
  display: grid;
  gap: 14px;
}

.tut-intro p,
.tut-chapter__blurb,
.tut-ref__lede,
.tut-ref__note {
  margin: 0;
  color: var(--muted-foreground);
  line-height: 1.62;
  max-width: 60ch;
}

.tut-chapter {
  padding-top: clamp(56px, 8vw, 92px);
  scroll-margin-top: 72px;
}

.tut-chapter__top {
  display: grid;
  gap: 28px;
  align-items: start;
}

.tut-chapter__top header .eyebrow {
  color: var(--lime-ink);
}

.tut-chapter__top h2 {
  margin: 8px 0 10px;
}

.tut-clip {
  margin: 0;
}

.tut-clip video {
  display: block;
  width: 100%;
  border: 1px solid var(--border);
  background: var(--background);
  box-shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.7);
}

.tut-clip--phone video {
  max-width: 390px;
  aspect-ratio: 390 / 844;
  border-radius: 22px;
  margin-inline: auto;
}

.tut-clip--desk video {
  width: 100%;
  aspect-ratio: 1280 / 820;
  border-radius: 14px;
}

.tut-clip figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted-foreground);
}

.tut-clip--phone figcaption {
  max-width: 390px;
  margin-inline: auto;
  text-align: center;
}

.tut-group {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-foreground);
  margin: clamp(40px, 6vw, 64px) 0 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.tut-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.tut-step {
  display: grid;
  gap: 22px;
  align-items: start;
  padding: clamp(26px, 4vw, 38px) 0;
  border-top: 1px solid var(--border);
  scroll-margin-top: 72px;
}

.tut-step:first-child {
  border-top: 0;
}

.tut-step__copy {
  max-width: 56ch;
  display: grid;
  gap: 10px;
}

.tut-step__meta {
  display: flex;
  align-items: baseline;
  gap: 11px;
  margin: 0;
}

.tut-step__n {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  color: var(--lime-ink);
  font-variant-numeric: tabular-nums;
}

.tut-step__meta code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted-foreground);
  background: var(--inset);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 7px;
}

.tut-step h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 0;
  text-wrap: balance;
}

.tut-step__copy p {
  margin: 0;
  color: var(--muted-foreground);
  line-height: 1.62;
}

.tut-step__copy b {
  color: var(--foreground);
  font-weight: 600;
}

.tut-note {
  border-left: 2px solid var(--flag);
  background: color-mix(in oklab, var(--flag) 9%, transparent);
  padding: 10px 14px;
  border-radius: 0 10px 10px 0;
  font-size: 14px;
}

/* ---------- device frames ---------- */

.tut-shot {
  margin: 0;
}

.tut-frame {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  font: inherit;
  color: inherit;
  text-align: inherit;
  overflow: hidden;
  background: var(--background);
  border: 1px solid var(--border);
  box-shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.7);
  cursor: zoom-in;
}

.tut-frame img {
  display: block;
  width: 100%;
}

.tut-frame--phone {
  max-width: 268px;
  margin-inline: auto;
  border-radius: 22px;
  padding: 5px;
}

.tut-frame--phone img {
  border-radius: 18px;
}

.tut-frame--desk {
  border-radius: 14px;
  padding: 4px;
}

.tut-frame--desk img {
  border-radius: 11px;
}

/* Several screens tall: show the top and let it be opened. */
.tut-frame--tall {
  max-height: 58vh;
}

.tut-frame--tall::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 84px;
  pointer-events: none;
  background: linear-gradient(to bottom, transparent, var(--background));
}

/* The way on, at the point somebody has finished reading. */

.tut-onward {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-top: clamp(28px, 4vw, 44px);
  padding: 16px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--card);
  text-decoration: none;
}

.tut-onward:hover {
  border-color: var(--lime-ink);
}

.tut-onward__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-foreground);
  flex: none;
}

.tut-onward__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
}

.tut-onward__arrow {
  margin-left: auto;
  color: var(--lime-ink);
  font-size: 18px;
}

.tut-tablewrap .where {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime-ink);
  white-space: nowrap;
}

/* ---------- the clip, on the landing page ---------- */

.tut-showcase {
  padding: clamp(48px, 7vw, 84px) 20px;
  display: grid;
  gap: 32px;
  align-items: center;
}

.tut-showcase h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4.4vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 10px 0 14px;
  text-wrap: balance;
}

.tut-showcase p {
  margin: 0 0 24px;
  color: var(--muted-foreground);
  line-height: 1.6;
  max-width: 52ch;
}

.tut-showcase .tut-facts {
  margin-top: 22px;
}

@media (min-width: 900px) {
  .tut-showcase {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 56px;
  }
}

/* ---------- reference ---------- */

.tut-ref {
  padding-top: clamp(56px, 8vw, 92px);
  scroll-margin-top: 72px;
}

.tut-ref h2 {
  margin-bottom: 12px;
}

.tut-ref__note {
  margin-top: 18px;
}

.tut-tablewrap {
  margin-top: 22px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--card);
}

.tut-tablewrap table {
  border-collapse: collapse;
  width: 100%;
  min-width: 34rem;
}

.tut-tablewrap caption {
  text-align: left;
  padding: 14px 16px 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.tut-tablewrap th,
.tut-tablewrap td {
  text-align: left;
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 14.5px;
  vertical-align: top;
  color: var(--muted-foreground);
}

.tut-tablewrap tbody tr:last-child td {
  border-bottom: 0;
}

.tut-tablewrap th {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
}

.tut-tablewrap .pip {
  font-family: var(--font-mono);
  color: var(--lime-ink);
  font-variant-numeric: tabular-nums;
  width: 3rem;
}

.tut-tablewrap .rank,
.tut-tablewrap .name {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--foreground);
  white-space: nowrap;
}

.tut-tablewrap .band {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  color: var(--foreground);
}

.tut-tablewrap .route code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--lime-ink);
}

/* ---------- closing ---------- */

.tut-cta {
  margin-top: clamp(56px, 8vw, 92px);
  padding: clamp(28px, 4vw, 40px);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  background: var(--card);
}

.tut-cta p {
  margin: 10px 0 22px;
  color: var(--muted-foreground);
  max-width: 52ch;
}

.tut-cta .hero-ctas {
  margin-bottom: 0;
}

/* ---------- opening a screenshot ---------- */

.tut-lightbox {
  position: fixed;
  inset: 0;
  z-index: 90;
  padding: clamp(12px, 3vw, 32px);
  background: color-mix(in oklab, var(--background) 90%, transparent);
  backdrop-filter: blur(6px);
  overflow: auto;
  cursor: zoom-out;
}

.tut-lightbox[hidden] {
  display: none;
}

.tut-lightbox img {
  display: block;
  margin: 0 auto;
  width: 100%;
  max-width: 400px;
  border-radius: 18px;
  border: 1px solid var(--border);
}

.tut-lightbox--desk img {
  max-width: 1280px;
  border-radius: 12px;
}

.tut-lightbox__close {
  position: sticky;
  top: 0;
  margin-left: auto;
  display: block;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--foreground);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}

/* ---------- wide ---------- */

@media (min-width: 900px) {
  .tut-chapter__top--phone {
    grid-template-columns: minmax(0, 1fr) 390px;
  }

  .tut-step--phone {
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: 44px;
    align-items: center;
  }
}

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