/* FileSight showcase site.
 *
 * No build step, no external requests: one stylesheet, system fonts, and a
 * palette that follows the visitor's light/dark preference. Anything fetched
 * from a CDN would be one more thing that can break a release deploy. */

:root {
  color-scheme: light dark;

  --bg: #f8fafc;
  --bg-raised: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #475569;
  --text-faint: #94a3b8;
  --accent: #4f46e5;
  --accent-text: #ffffff;
  --accent-soft: #eef2ff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --bg-raised: #131c31;
    --border: #24314d;
    --text: #e8edf7;
    --text-muted: #a6b3cc;
    --text-faint: #6d7d99;
    --accent: #8b8bf7;
    --accent-text: #0b1120;
    --accent-soft: #1b2440;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0 1.25rem 4rem;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 0.5rem;
}

/* ---------- language switch ---------- */

.langbar {
  max-width: 60rem;
  margin: 0 auto;
  padding-top: 1rem;
  display: flex;
  justify-content: flex-end;
  gap: 0.35rem;
}

.langbar__button {
  padding: 0.3rem 0.7rem;
  border: 1px solid transparent;
  border-radius: 8px;
  background: none;
  color: var(--text-faint);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
}

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

/* The active language is marked by more than colour, so it is still obvious
   in greyscale and to anyone who cannot distinguish the two shades. */
.langbar__button--active {
  border-color: var(--border);
  background: var(--bg-raised);
  color: var(--text);
  font-weight: 600;
}

/* ---------- hero ---------- */

.hero {
  max-width: 44rem;
  margin: 0 auto;
  padding: 4rem 0 3rem;
  text-align: center;
  /* The illustration sits behind the text. `isolation` keeps its negative
     z-index inside the hero instead of sliding under the page background. */
  position: relative;
  isolation: isolate;
}

/* ---------- hero illustration ---------- */

.hero__art {
  position: absolute;
  z-index: -1;
  /* Wider than the hero's 44rem text column: the drawing is composed
     left to right and would lose both ends if clipped to the text width. */
  left: 50%;
  transform: translateX(-50%);
  width: min(80rem, 116vw);
  top: 1rem;
  pointer-events: none;
  /* The dissolve into the page. A mask rather than a gradient overlay, so it
     works whatever is behind it and needs no copy of the background colour
     that could fall out of sync with the theme. */
  -webkit-mask-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 1) 0%,
    rgba(0, 0, 0, 1) 45%,
    rgba(0, 0, 0, 0) 100%
  );
  mask-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 1) 0%,
    rgba(0, 0, 0, 1) 45%,
    rgba(0, 0, 0, 0) 100%
  );
}

.hero__art img {
  display: block;
  width: 100%;
  height: auto;
  /* The artwork is black line work on transparency, so a single filter
     serves both themes instead of two image files that can drift apart. */
  opacity: 0.16;
}

@media (prefers-color-scheme: dark) {
  .hero__art img {
    filter: invert(1);
    opacity: 0.22;
  }
}

/* Below this the hero text wraps to several lines and the drawing starts
   crowding it; the page reads better with nothing behind it. */
@media (max-width: 48rem) {
  .hero__art {
    display: none;
  }
}

.hero__icon {
  border-radius: 16px;
}

.hero h1 {
  font-size: clamp(2.25rem, 6vw, 3.25rem);
  letter-spacing: -0.02em;
  margin-top: 1rem;
}

.hero__tagline {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin: 0 auto 1rem;
  max-width: 34rem;
}

.hero__version {
  color: var(--text-faint);
  font-size: 0.85rem;
  margin: 0 0 1.75rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* ---------- buttons ---------- */

.button {
  display: inline-block;
  padding: 0.6rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-raised);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition:
    transform 0.12s ease,
    border-color 0.12s ease;
}

.button:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.button--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.button[aria-disabled="true"] {
  opacity: 0.55;
  pointer-events: none;
}

/* ---------- sections ---------- */

main {
  max-width: 60rem;
  margin: 0 auto;
}

section {
  margin: 0 0 3.5rem;
}

.features {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

.features article {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem;
}

.features h2 {
  font-size: 1.05rem;
}

.features p {
  color: var(--text-muted);
  font-size: 0.93rem;
  margin: 0;
}

.downloads h2,
.requirements h2 {
  font-size: 1.5rem;
}

.downloads__note {
  color: var(--text-muted);
  margin-top: 0;
}

.cards {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
}

.card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-start;
}

.card h3 {
  font-size: 1.05rem;
  margin: 0;
}

.card__kind {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin: 0;
}

.card__meta {
  color: var(--text-faint);
  font-size: 0.78rem;
  margin: 0;
  word-break: break-all;
}

/* What the package needs, stated on the card itself. Colour is a hint, never
   the message: both badges read correctly in greyscale. */
.card__badge {
  margin: 0;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.card__badge--complete {
  border-color: rgba(16, 150, 100, 0.45);
  color: #0b7a55;
}

.card__badge--needs {
  color: var(--text-muted);
}

@media (prefers-color-scheme: dark) {
  .card__badge--complete {
    color: #4ad4a0;
  }
}

.card--unavailable {
  opacity: 0.7;
}

.downloads__all {
  font-size: 0.9rem;
  margin-top: 1.25rem;
}

.requirements {
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
}

.requirements p {
  color: var(--text-muted);
  margin: 0 0 0.75rem;
}

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

/* The honest small print: visible, but not the headline. */
.requirements__caveat {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-faint);
}

/* ---------- footer ---------- */

.footer {
  max-width: 60rem;
  margin: 0 auto;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer__legal {
  color: var(--text-faint);
  font-size: 0.82rem;
}