/* PatternMaster — start page. Dark like the Designer, orange as the brand colour, wood tones for
   everything that stands for the material. No images and no web fonts: the live preview is the
   picture, and the page has to work offline from file:// as well. */

:root {
  --bg: #101317;
  --bg-2: #14171c;          /* the Designer's --bg, also the viewer's background */
  --card: #181c22;
  --line: #2a313b;
  --fg: #eef2f6;
  --muted: #95a1b0;
  --accent: #f4a24c;
  --accent-deep: #e0743a;
  --wood: #c08d55;
  --wood-dark: #9a6a39;
  --groove: rgba(60, 34, 12, 0.62);
  --radius: 20px;
  --pad: clamp(16px, 4vw, 40px);
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
/* clip, not hidden: the glow behind the preview may reach past the edge without a sideways
   scrollbar, and unlike hidden it leaves the sticky navigation working. */
html, body { overflow-x: clip; }
body {
  margin: 0;
  font: 17px/1.55 var(--font);
  color: var(--fg);
  background-color: var(--bg);
  /* A faint grid, like the bed of a machine. */
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[hidden] { display: none !important; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px; border: 1px solid transparent;
  font: 700 0.98rem/1 var(--font); letter-spacing: 0.01em; text-decoration: none; cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  color: #1c1107;
  background: linear-gradient(135deg, #f8b862, var(--accent-deep));
  box-shadow: 0 10px 30px -8px rgba(240, 130, 50, 0.55);
}
.btn-primary:hover { box-shadow: 0 14px 36px -8px rgba(240, 130, 50, 0.7); }
.btn-ghost { color: var(--fg); border-color: #3a4452; background: rgba(255, 255, 255, 0.02); }
.btn-ghost:hover { border-color: var(--muted); }
.btn-big { padding: 17px 30px; font-size: 1.05rem; }
.btn-small { padding: 9px 16px; font-size: 0.9rem; }
.btn[aria-disabled="true"] { opacity: 0.45; pointer-events: none; }

/* ---------- navigation ---------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px var(--pad);
  background: rgba(16, 19, 23, 0.78);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.1rem; letter-spacing: -0.01em; text-decoration: none; }
/* The mark: a little board with a crosshatch cut into it. */
.brand-mark {
  width: 24px; height: 24px; border-radius: 6px; flex: none;
  background:
    repeating-linear-gradient(45deg, rgba(40, 20, 5, 0.55) 0 2px, transparent 2px 7px),
    repeating-linear-gradient(-45deg, rgba(40, 20, 5, 0.55) 0 2px, transparent 2px 7px),
    linear-gradient(135deg, #f8b862, var(--accent-deep));
}
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links > a:not(.btn) { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 0.95rem; }
.nav-links > a:not(.btn):hover { color: var(--fg); }
.lang { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 2px; }
.lang button {
  font: 700 0.78rem/1 var(--font); letter-spacing: 0.06em; color: var(--muted);
  background: none; border: 0; padding: 6px 10px; border-radius: 999px; cursor: pointer;
}
.lang button[aria-pressed="true"] { background: var(--line); color: var(--fg); }

/* ---------- common ---------- */
main > section { max-width: 1240px; margin: 0 auto; padding: 96px var(--pad); }
.eyebrow {
  margin: 0 0 14px; color: var(--accent);
  font-weight: 800; font-size: 0.8rem; letter-spacing: 0.18em; text-transform: uppercase;
}
.section-title { margin: 0; font-size: clamp(2rem, 4.4vw, 3.4rem); line-height: 1.02; letter-spacing: -0.035em; font-weight: 850; }
.section-lead { margin: 18px 0 0; max-width: 640px; color: var(--muted); font-size: 1.1rem; }
h1 em, h2 em, .final em {
  font-style: normal;
  background: linear-gradient(95deg, #f8b862 10%, var(--accent-deep) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  display: grid; grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr); gap: clamp(32px, 5vw, 64px);
  align-items: center;
  padding-top: 56px; padding-bottom: 88px;
}
.hero::before {                         /* warm glow behind the preview */
  content: ""; position: absolute; z-index: -1; right: -8%; top: 4%; width: 70%; height: 90%;
  background: radial-gradient(closest-side, rgba(244, 162, 76, 0.2), transparent);
  filter: blur(20px); pointer-events: none;
}
.hero h1 {
  margin: 0; font-size: clamp(3.1rem, 7.6vw, 6.4rem); line-height: 0.9; letter-spacing: -0.05em; font-weight: 900;
}
.lead { margin: 26px 0 0; max-width: 520px; font-size: 1.18rem; color: #c3ccd6; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.facts { display: flex; flex-wrap: wrap; gap: 10px 22px; margin: 30px 0 0; padding: 0; list-style: none; color: var(--muted); font-size: 0.95rem; font-weight: 600; }
.facts li { display: inline-flex; align-items: center; gap: 8px; }
.facts li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }

/* ---------- the preview card ---------- */
.stage-card {
  background: linear-gradient(180deg, #1a1f26, #15191f);
  border: 1px solid var(--line); border-radius: calc(var(--radius) + 6px);
  padding: 12px; box-shadow: 0 40px 80px -30px rgba(0, 0, 0, 0.8);
}
.stage-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; padding: 2px 2px 12px; }
.tabs { display: inline-flex; background: #0f1216; border: 1px solid var(--line); border-radius: 999px; padding: 3px; }
.tabs button {
  font: 700 0.9rem/1 var(--font); color: var(--muted); background: none; border: 0;
  padding: 10px 16px; border-radius: 999px; cursor: pointer; transition: background-color 0.15s, color 0.15s;
}
.tabs button[aria-selected="true"] { background: var(--accent); color: #1c1107; }
.picker select {
  font: 600 0.92rem/1 var(--font); color: var(--fg);
  background: #0f1216 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%2395a1b0' stroke-width='2'/%3E%3C/svg%3E") no-repeat right 14px center;
  border: 1px solid var(--line); border-radius: 999px; padding: 11px 38px 11px 16px;
  appearance: none; -webkit-appearance: none; cursor: pointer; max-width: 100%;
}
.stage {
  position: relative; aspect-ratio: 3 / 2; width: 100%;
  border-radius: var(--radius); overflow: hidden; background: var(--bg-2);
}
.stage iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; display: block; }
.status {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  display: inline-flex; align-items: center; gap: 10px;
  padding: 10px 16px; border-radius: 999px; background: rgba(16, 19, 23, 0.85); border: 1px solid var(--line);
  font-weight: 600; font-size: 0.92rem; color: var(--fg); pointer-events: none;
}
.status.error { color: #ffb4a8; border-color: #6b2e27; }
.spinner {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid rgba(244, 162, 76, 0.25); border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}
.status.error .spinner { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.hint {
  position: absolute; left: 14px; bottom: 10px; margin: 0; pointer-events: none;
  font-size: 0.8rem; color: rgba(214, 221, 230, 0.55);
}
.stage-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; padding: 16px 6px 6px; }
.ex-info { flex: 1 1 260px; min-width: 0; }
.ex-info h2 { margin: 0; font-size: 1.35rem; letter-spacing: -0.02em; }
.ex-info p { margin: 4px 0 0; color: var(--muted); font-size: 0.97rem; }

/* ---------- how it works ---------- */
.steps { list-style: none; margin: 48px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.steps li {
  position: relative; padding: 30px 28px 32px; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--line);
}
.step-num {
  display: block; font-size: 4.2rem; font-weight: 900; line-height: 1; letter-spacing: -0.04em;
  color: transparent; -webkit-text-stroke: 1.5px var(--accent);
}
.steps h3 { margin: 18px 0 8px; font-size: 1.4rem; letter-spacing: -0.02em; }
.steps p { margin: 0; color: var(--muted); }

/* ---------- gallery ---------- */
.cards { margin-top: 44px; display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.card {
  display: flex; flex-direction: column; text-align: left; padding: 0; overflow: hidden;
  background: var(--card); color: var(--fg); border: 1px solid var(--line); border-radius: var(--radius);
  font: inherit; cursor: pointer; transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.card:hover { transform: translateY(-3px); border-color: #3d4755; box-shadow: 0 18px 40px -20px rgba(0, 0, 0, 0.9); }
.card[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 18px 40px -20px rgba(240, 130, 50, 0.5); }
.card-body { padding: 16px 18px 20px; }
.card-body h3 { margin: 0; font-size: 1.12rem; letter-spacing: -0.01em; }
.card-body p { margin: 6px 0 0; color: var(--muted); font-size: 0.93rem; line-height: 1.45; }

/* Swatches: a hint of each pattern cut into a piece of wood, drawn with CSS instead of photos. */
.swatch {
  aspect-ratio: 16 / 9; width: 100%;
  background-color: var(--wood);
  background-image: linear-gradient(135deg, #d29d62, var(--wood-dark));
}
.sw-crosshatch {
  background-image:
    repeating-linear-gradient(45deg, var(--groove) 0 3px, transparent 3px 15px),
    repeating-linear-gradient(-45deg, var(--groove) 0 3px, transparent 3px 15px),
    linear-gradient(135deg, #d29d62, var(--wood-dark));
}
.sw-waves {
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='16'%3E%3Cpath d='M0 8 Q15 0 30 8 T60 8' fill='none' stroke='%233c220c' stroke-opacity='.62' stroke-width='3'/%3E%3C/svg%3E"),
    linear-gradient(135deg, #d29d62, var(--wood-dark));
  background-size: 60px 16px, auto;
}
.sw-blobs, .sw-flowers {
  background-image:
    radial-gradient(ellipse 18% 26% at 22% 38%, rgba(60, 34, 12, 0.7), rgba(60, 34, 12, 0.25) 70%, transparent 72%),
    radial-gradient(ellipse 13% 20% at 62% 66%, rgba(60, 34, 12, 0.7), rgba(60, 34, 12, 0.25) 70%, transparent 72%),
    radial-gradient(ellipse 10% 15% at 80% 28%, rgba(60, 34, 12, 0.7), rgba(60, 34, 12, 0.25) 70%, transparent 72%),
    radial-gradient(ellipse 7% 11% at 42% 78%, rgba(60, 34, 12, 0.7), rgba(60, 34, 12, 0.25) 70%, transparent 72%),
    linear-gradient(135deg, #d29d62, var(--wood-dark));
}
.sw-truchet-circle {
  background-image:
    radial-gradient(circle at 0 0, transparent 10px, var(--groove) 10px 13px, transparent 13px 22px, var(--groove) 22px 25px, transparent 25px),
    radial-gradient(circle at 100% 100%, transparent 10px, var(--groove) 10px 13px, transparent 13px 22px, var(--groove) 22px 25px, transparent 25px),
    linear-gradient(135deg, #d29d62, var(--wood-dark));
  background-size: 35px 35px, 35px 35px, auto;
}
.sw-noisefield {
  background-image:
    radial-gradient(ellipse 40% 30% at 25% 30%, rgba(60, 34, 12, 0.55), transparent 70%),
    radial-gradient(ellipse 35% 40% at 75% 70%, rgba(60, 34, 12, 0.5), transparent 70%),
    radial-gradient(ellipse 30% 25% at 70% 20%, rgba(255, 230, 190, 0.25), transparent 70%),
    repeating-linear-gradient(0deg, rgba(60, 34, 12, 0.14) 0 2px, transparent 2px 7px),
    linear-gradient(135deg, #d29d62, var(--wood-dark));
}
.sw-hole {
  background-image:
    radial-gradient(circle, var(--bg-2) 0 9px, rgba(60, 34, 12, 0.6) 9px 10.5px, transparent 11px),
    radial-gradient(circle, var(--bg-2) 0 9px, rgba(60, 34, 12, 0.6) 9px 10.5px, transparent 11px),
    linear-gradient(135deg, #d29d62, var(--wood-dark));
  background-size: 28px 48px, 28px 48px, auto;
  background-position: 0 0, 14px 24px, 0 0;
}
.sw-hole-honeycomb {
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='30' height='52'%3E%3Cg fill='%2314171c' stroke='%233c220c' stroke-opacity='.6' stroke-width='1.5'%3E%3Cpath d='M15 2l11 6.5v13L15 28 4 21.5v-13z'/%3E%3Cpath d='M0 28l11 6.5v13L0 54M30 28l-11 6.5v13L30 54M0 -24l11 6.5v13L0 2M30 -24l-11 6.5v13L30 2'/%3E%3C/g%3E%3C/svg%3E"),
    linear-gradient(135deg, #d29d62, var(--wood-dark));
  background-size: 30px 52px, auto;
}
.sw-parallel, .sw-truchet-straight {
  background-image:
    repeating-linear-gradient(90deg, var(--groove) 0 3px, transparent 3px 13px),
    linear-gradient(135deg, #d29d62, var(--wood-dark));
}

/* ---------- why ---------- */
.why { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 36px; padding-top: 24px; }
.why-item { border-top: 2px solid var(--accent); padding-top: 22px; }
.why-item h3 { margin: 0 0 8px; font-size: 1.3rem; letter-spacing: -0.02em; }
.why-item p { margin: 0; color: var(--muted); }

/* ---------- final call ---------- */
.final { text-align: center; }
.final h2 { margin: 0 0 34px; font-size: clamp(2.4rem, 5.6vw, 4.6rem); line-height: 0.98; letter-spacing: -0.045em; font-weight: 900; }

.footer {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 36px var(--pad) 48px; color: var(--muted); font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* ---------- narrow screens ---------- */
@media (max-width: 980px) {
  .hero { grid-template-columns: minmax(0, 1fr); }
  .lead { max-width: none; }
}
@media (max-width: 760px) {
  main > section { padding-top: 72px; padding-bottom: 72px; }
  .steps, .why { grid-template-columns: minmax(0, 1fr); }
  .nav-links > a:not(.btn) { display: none; }
  .nav-links { gap: 12px; }
}
@media (max-width: 560px), (hover: none) {
  .hint { display: none; }              /* mouse instructions; on a phone you simply swipe */
}
@media (max-width: 420px) {
  .nav .btn-small { display: none; }
  .tabs button { padding: 9px 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation-duration: 0.01ms !important; }
}