/* ================================================================ */
/* CHEA 4K DOWNLOADER — product page                                */
/* Editorial / Swiss. Ink ground, hairline rules, one red action.   */
/* Tokens only — no literal palette values.                         */
/* ================================================================ */

.c4k {
  --rule: 1px solid var(--paper-border);
  --measure: 58ch;
  display: block;
}

/* tools.css sets h1 to max-width:11ch and clamp; this page overrides */

/* ---------------- crumb ---------------- */
.c4k-crumb {
  margin: 0 0 var(--space-4);
  padding: 22px 0 0;
  font: 700 10px var(--font-body);
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.c4k-crumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out-expo);
}
.c4k-crumb a:hover,
.c4k-crumb a:focus-visible { color: var(--accent); }

/* ---------------- hero ---------------- */
.c4k-hero { padding: 0 0 var(--space-5); }

.c4k-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: start;
}

.c4k-hero .eyebrow { display: block; margin: 0 0 var(--space-2); }

.c4k-hero h1 {
  max-width: none;
  margin: 0 0 var(--space-3);
  /* "DOWNLOADER" is the longest line; keep it on one line at every width */
  font-size: clamp(30px, 8.4vw, 118px);
  line-height: .86;
  letter-spacing: -.045em;
  overflow-wrap: normal;
  word-break: keep-all;
  hyphens: none;
}

.c4k-thesis {
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
  color: var(--paper);
  font-size: clamp(17px, 1.4vw + 12px, 23px);
  line-height: 1.42;
}

.c4k-hero__icon {
  order: -1;
  margin: 0;
  width: clamp(88px, 26vw, 132px);
}
.c4k-hero__icon img {
  display: block;
  width: 100%;
  height: auto;
}

/* meta list */
.c4k-meta {
  margin: 0 0 var(--space-4);
  padding: 0;
  border-top: var(--rule);
  max-width: 44ch;
}
.c4k-meta > div {
  display: flex;
  flex-wrap: wrap;
  gap: 4px var(--space-2);
  justify-content: space-between;
  padding: 11px 0;
  border-bottom: var(--rule);
}
.c4k-meta dt {
  margin: 0;
  color: var(--muted);
  font: 700 10px var(--font-display);
  letter-spacing: .14em;
  text-transform: uppercase;
}
.c4k-meta dd {
  margin: 0;
  color: var(--paper);
  font-size: 14px;
  text-align: right;
}
.c4k-meta dd.is-live { color: var(--accent); font-weight: 700; }

/* ---------------- buttons ---------------- */
.c4k-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}
.c4k-btn {
  display: inline-block;
  padding: 15px 22px;
  border: 1px solid var(--paper-border);
  color: var(--paper);
  font: 700 12px var(--font-display);
  letter-spacing: .12em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color var(--dur-fast) var(--ease-out-expo),
              border-color var(--dur-fast) var(--ease-out-expo),
              color var(--dur-fast) var(--ease-out-expo),
              transform var(--dur-fast) var(--ease-out-expo);
}
.c4k-btn:hover { border-color: var(--paper); background: var(--paper-ghost); }
.c4k-btn:active { transform: translateY(1px); }
.c4k-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.c4k-btn--primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}
.c4k-btn--primary:hover {
  background: transparent;
  border-color: var(--accent);
  color: var(--accent);
}
.c4k-btn--primary:focus-visible { outline-color: var(--paper); }

/* ---------------- section frame ---------------- */
.c4k-section {
  padding: var(--space-5) 0 0;
  border-top: var(--rule);
  margin-top: var(--space-5);
}

.c4k-sechead { margin-bottom: var(--space-4); }
.c4k-sechead__num {
  margin: 0 0 var(--space-1);
  color: var(--accent);
  font: 700 12px var(--font-display);
  letter-spacing: .16em;
}
.c4k-sechead h2 {
  margin: 0 0 var(--space-2);
  font-size: clamp(30px, 5.5vw, 54px);
  line-height: .92;
}
.c4k-sechead__lead {
  max-width: var(--measure);
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.5;
}

/* ---------------- CSS window mock ---------------- */
.c4k-mockscroll { overflow-x: auto; padding-bottom: 6px; }

.c4k-mock {
  margin: 0;
  min-width: 300px;
  max-width: 480px;
}

.c4k-win {
  border: 1px solid var(--paper-border);
  background: var(--surface-1);
  box-shadow: 0 24px 60px var(--ink-hover);
}

.c4k-win__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 11px 14px;
  border-bottom: var(--rule);
  background: var(--surface-2);
}
.c4k-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--paper-hover);
}
.c4k-win__title {
  margin: 0 0 0 auto;
  padding-right: 4px;
  color: var(--muted);
  font: 700 9px var(--font-display);
  letter-spacing: .16em;
}

.c4k-win__body { padding: 20px 18px 22px; }

.c4k-lbl {
  margin: 0 0 7px;
  color: var(--muted);
  font: 700 9px var(--font-display);
  letter-spacing: .16em;
  text-transform: uppercase;
}
.c4k-lbl + .c4k-row,
.c4k-lbl + .c4k-formats { margin-bottom: 18px; }

.c4k-row { display: flex; gap: 7px; }
.c4k-field {
  flex: 1;
  min-width: 0;
  padding: 11px 12px;
  border: 1px solid var(--paper-border);
  background: var(--ink);
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.c4k-fetch {
  flex: none;
  padding: 11px 14px;
  border: 1px solid var(--paper-border);
  color: var(--paper);
  font: 700 10px var(--font-display);
  letter-spacing: .12em;
}
.c4k-fetch--ghost { color: var(--muted); }

.c4k-formats {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--rule);
}
.c4k-formats li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 9px 0 9px 12px;
  border-bottom: var(--rule);
  border-left: 2px solid transparent;
}
.c4k-formats li.is-on {
  border-left-color: var(--accent);
  background: var(--accent-dim);
}
.c4k-fmt { color: var(--paper); font: 700 13px var(--font-display); letter-spacing: .04em; }
.c4k-formats li.is-on .c4k-fmt { color: var(--accent); }
.c4k-cnt { color: var(--muted); font-size: 11px; }

.c4k-progress {
  height: 4px;
  margin: 22px 0 7px;
  background: var(--paper-ghost);
}
.c4k-progress span { display: block; height: 100%; background: var(--accent); }
.c4k-progresstxt {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .04em;
}

.c4k-dl {
  padding: 15px;
  background: var(--accent);
  color: var(--on-accent);
  font: 700 12px var(--font-display);
  letter-spacing: .16em;
  text-align: center;
}

.c4k-mock figcaption {
  margin-top: var(--space-2);
  max-width: 46ch;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}
.c4k-mock figcaption strong { color: var(--paper); }

/* ---------------- steps ---------------- */
.c4k-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--rule);
}
.c4k-steps li {
  padding: var(--space-3) 0;
  border-bottom: var(--rule);
}
.c4k-steps__n {
  margin: 0 0 var(--space-1);
  color: var(--accent);
  font: 700 11px var(--font-display);
  letter-spacing: .16em;
}
.c4k-steps h3 {
  margin: 0 0 8px;
  color: var(--paper);
  font: 700 clamp(19px, 2.2vw, 25px)/1.05 var(--font-display);
  letter-spacing: -.02em;
}
.c4k-steps p:not(.c4k-steps__n) {
  max-width: 46ch;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
}

/* ---------------- table ---------------- */
.c4k-tablescroll {
  overflow-x: auto;
  border-top: var(--rule);
  -webkit-overflow-scrolling: touch;
}
.c4k-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  text-align: left;
}
.c4k-table th,
.c4k-table td {
  padding: 14px 16px 14px 0;
  border-bottom: var(--rule);
  vertical-align: top;
  font-size: 14px;
  line-height: 1.45;
}
.c4k-table thead th {
  color: var(--accent);
  font: 700 10px var(--font-display);
  letter-spacing: .14em;
  text-transform: uppercase;
  white-space: nowrap;
}
.c4k-table tbody th {
  color: var(--paper);
  font-weight: 700;
  width: 24%;
}
.c4k-table td { color: var(--muted); }
.c4k-table td:nth-child(2) { color: var(--paper); font-weight: 700; white-space: nowrap; }
.c4k-table tbody tr:hover td,
.c4k-table tbody tr:hover th { background: var(--paper-ghost); }

/* ---------------- notes ---------------- */
.c4k-notes {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  margin-top: var(--space-4);
}
.c4k-note {
  padding: var(--space-3);
  border: 1px solid var(--paper-border);
  border-left: 3px solid var(--accent);
  background: var(--surface-1);
}
.c4k-note h3 {
  margin: 0 0 8px;
  color: var(--paper);
  font: 700 13px var(--font-display);
  letter-spacing: .1em;
  text-transform: uppercase;
}
.c4k-note p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
}

/* ---------------- platforms ---------------- */
.c4k-plats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.c4k-plat {
  display: flex;
  flex-direction: column;
  padding: var(--space-3);
  border: 1px solid var(--paper-border);
  border-top: 4px solid var(--accent);
  background: var(--surface-1);
}
.c4k-plat__ver {
  margin: 0 0 var(--space-2);
  color: var(--accent);
  font: 700 12px var(--font-display);
  letter-spacing: .14em;
}
.c4k-plat h3 {
  margin: 0 0 10px;
  font: 700 clamp(28px, 4vw, 40px)/.95 var(--font-display);
  letter-spacing: -.03em;
}
.c4k-plat__req {
  margin: 0 0 var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: var(--rule);
  color: var(--paper);
  font-size: 14px;
}
.c4k-plat__note {
  margin: 0 0 var(--space-3);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}
.c4k-plat__note strong { color: var(--paper); }
.c4k-plat__dep {
  margin: auto 0 0;
  padding-top: var(--space-2);
  border-top: var(--rule);
  color: var(--muted);
  font: 700 11px var(--font-display);
  letter-spacing: .12em;
  text-transform: uppercase;
}

/* ---------------- coming ---------------- */
.c4k-soon {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--rule);
}
.c4k-soon li {
  position: relative;
  padding: 16px 0 16px 34px;
  border-bottom: var(--rule);
  color: var(--paper);
  font: 700 clamp(16px, 2.4vw, 22px)/1.2 var(--font-display);
  letter-spacing: -.01em;
}
.c4k-soon li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 16px;
  height: 1px;
  background: var(--accent);
}

/* ---------------- CTA ---------------- */
.c4k-cta {
  margin-top: var(--space-5);
  padding: var(--space-5) var(--space-3);
  border: 1px solid var(--paper-border);
  border-top: 4px solid var(--accent);
  background: var(--surface-1);
}
.c4k-cta .eyebrow { display: block; margin: 0 0 var(--space-2); }
.c4k-cta h2 {
  margin: 0 0 var(--space-2);
  font-size: clamp(32px, 6.5vw, 64px);
  line-height: .92;
}
.c4k-cta__lead {
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
  color: var(--muted);
  font-size: 17px;
  line-height: 1.5;
}
.c4k-fineprint {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: var(--rule);
  display: grid;
  gap: var(--space-2);
}
.c4k-fineprint p {
  max-width: 62ch;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}
.c4k-fineprint strong { color: var(--paper); }

/* ================================================================ */
/* Breakpoints                                                      */
/* ================================================================ */
@media (min-width: 640px) {
  .c4k-notes { grid-template-columns: 1fr 1fr; }
  .c4k-plats { grid-template-columns: 1fr 1fr; }
  .c4k-steps { grid-template-columns: 1fr 1fr; column-gap: var(--space-4); }
  .c4k-steps li { padding-right: var(--space-3); }
}

@media (min-width: 900px) {
  .c4k-hero { padding: 0 0 var(--space-6); }
  .c4k-hero__grid {
    grid-template-columns: minmax(0, 1fr) 190px;
    gap: var(--space-5);
    align-items: start;
  }
  .c4k-hero__icon { order: 0; width: 100%; margin-top: 46px; }
  .c4k-section { padding-top: var(--space-6); margin-top: var(--space-6); }
  .c4k-sechead {
    display: grid;
    grid-template-columns: 90px minmax(0, 1fr);
    gap: 0 var(--space-4);
    margin-bottom: var(--space-5);
  }
  .c4k-sechead__num { grid-row: 1 / span 2; margin: 10px 0 0; }
  .c4k-steps { grid-template-columns: repeat(4, 1fr); }
  .c4k-cta { padding: var(--space-6) var(--space-5); }
}

/* ================================================================ */
@media (prefers-reduced-motion: reduce) {
  .c4k * {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* inline code in notes (checksum command) */
.c4k-cta code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:0.92em;padding:0.05em 0.35em;border:1px solid var(--rule, rgba(255,255,255,.18));border-radius:3px}
.c4k-cta a{color:inherit}