/* KLaunch download site — cyberpunk theme.
   Palette is a 1:1 port of k-avalonia LandonCurtis.KAvalonia.Theme/Themes/Palette.axaml. */

@font-face {
  font-family: "Exo 2";
  src: url("assets/exo2-variable.ttf") format("truetype-variations"),
       url("assets/exo2-variable.ttf") format("truetype");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Exo 2";
  src: url("assets/exo2-italic-variable.ttf") format("truetype-variations"),
       url("assets/exo2-italic-variable.ttf") format("truetype");
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}

:root {
  /* Surfaces */
  --bg: #070A12;
  --bg-alt: #090617;
  --surface: #0D1021;
  --surface-raised: #17142E;
  --surface-soft: #111832;
  --panel-translucent: rgba(13, 16, 33, 0.867);   /* #DD0D1021 */
  --panel-raised-translucent: rgba(23, 20, 46, 0.933); /* #EE17142E */
  --overlay-dim: rgba(7, 10, 18, 0.69);            /* #B0070A12 */

  /* Brand accents */
  --primary: #00E5FF;    /* cyan  — links, focus ring, secondary CTA */
  --secondary: #FF2BD6;  /* magenta */
  --accent: #8A2BFF;     /* purple */

  /* Text */
  --text: #EAF7FF;
  --text-muted: #8A94B8;
  --text-disabled: #56617F;
  --text-on-primary: #06111A;

  /* Lines */
  --border: #26304D;
  --border-soft: rgba(138, 148, 184, 0.4);         /* #668A94B8 */

  /* Status */
  --success: #39FF88;    /* primary download CTA glow */
  --error: #FF315A;
  --warning: #F8FF3D;

  /* Soft accent washes (mirrors the theme's 0.14 / 0.20 opacity brushes) */
  --primary-soft: rgba(0, 229, 255, 0.14);
  --secondary-soft: rgba(255, 43, 214, 0.14);
  --accent-soft: rgba(138, 43, 255, 0.20);
  --success-soft: rgba(57, 255, 136, 0.20);

  /* Shape & motion */
  --radius-card: 8px;
  --radius-pill: 999px;
  --maxw: 1080px;
  --focus-ring: 0 0 0 2px var(--bg), 0 0 0 4px var(--primary);
  --glow-cta: 0 0 0 1px rgba(57,255,136,0.5), 0 0 24px 2px rgba(57,255,136,0.45), 0 0 60px 8px rgba(0,229,255,0.18);
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);

  color-scheme: dark;
}

/* ---------- reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { font-family: "Exo 2", system-ui, "Segoe UI", sans-serif; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.01em; }
a { color: var(--primary); text-underline-offset: 3px; }
img { max-width: 100%; display: block; }
code, .mono { font-family: ui-monospace, "Cascadia Code", "JetBrains Mono", "Fira Code", monospace; }

/* ---------- cyberpunk backdrop ---------- */
.backdrop { position: fixed; inset: 0; z-index: -1; pointer-events: none; }
.backdrop::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(1200px 620px at 50% -12%, var(--accent-soft), transparent 60%),
    radial-gradient(900px 520px at 88% 6%, rgba(255,43,214,0.10), transparent 62%),
    radial-gradient(900px 520px at 8% 18%, rgba(0,229,255,0.08), transparent 60%),
    linear-gradient(var(--bg-alt), var(--bg));
}
.backdrop::after {
  content: ""; position: absolute; inset: -2px;
  background-image:
    linear-gradient(to right, var(--border-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-soft) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 85% 55% at 50% 0%, #000 28%, transparent 80%);
  mask-image: radial-gradient(ellipse 85% 55% at 50% 0%, #000 28%, transparent 80%);
  opacity: 0.22;
}
@media (prefers-reduced-motion: no-preference) {
  .backdrop::after { animation: gridDrift 24s linear infinite; }
  @keyframes gridDrift { from { background-position: 0 0; } to { background-position: 0 48px; } }
}

/* ---------- layout ---------- */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: 1.25rem; }
section { scroll-margin-top: 2rem; }
.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.section__head { margin-bottom: 1.5rem; }
.section__head h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.1rem); margin: 0 0 0.35rem;
}
.section__head p { color: var(--text-muted); margin: 0; max-width: 60ch; }
.eyebrow {
  display: inline-block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 0.6rem;
}

/* ---------- hero ---------- */
.hero { text-align: center; padding-block: clamp(3rem, 8vw, 6.5rem) clamp(1.5rem, 4vw, 3rem); }
.hero__logo {
  width: clamp(116px, 20vw, 184px); height: auto; margin-inline: auto;
  filter: drop-shadow(0 0 30px rgba(0,229,255,0.32)) drop-shadow(0 0 50px rgba(255,43,214,0.18));
}
.hero__wordmark {
  font-size: clamp(2.8rem, 10vw, 5.4rem); font-weight: 800; letter-spacing: -0.03em;
  margin: 0.3em 0 0.12em;
  background: linear-gradient(96deg, var(--primary) 0%, var(--text) 46%, var(--secondary) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__tagline {
  color: var(--text-muted); font-size: clamp(1.05rem, 2.6vw, 1.4rem);
  margin: 0 auto 2rem; max-width: 42ch;
}
.hero__cta { display: flex; gap: 0.9rem; justify-content: center; flex-wrap: wrap; align-items: center; }
.hero__platform { margin-top: 1.1rem; color: var(--text-disabled); font-size: 0.85rem; letter-spacing: 0.05em; }
.hero__fallback { margin-top: 1rem; color: var(--warning); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.55rem;
  padding: 0.85rem 1.6rem; border-radius: var(--radius-pill);
  font: inherit; font-weight: 700; font-size: 1.02rem;
  text-decoration: none; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface-raised); color: var(--text);
  transition: transform 0.15s var(--ease), box-shadow 0.25s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn__size { font-weight: 500; opacity: 0.82; font-size: 0.9em; }

.btn-primary {
  background: linear-gradient(180deg, var(--success), #28d873);
  color: var(--text-on-primary); border-color: transparent; box-shadow: var(--glow-cta);
}
.btn-primary:hover {
  box-shadow: 0 0 0 1px rgba(57,255,136,0.7), 0 0 32px 4px rgba(57,255,136,0.6), 0 0 80px 12px rgba(0,229,255,0.25);
}
.btn-secondary { background: transparent; border-color: var(--primary); color: var(--primary); }
.btn-secondary:hover { background: var(--primary-soft); box-shadow: 0 0 18px rgba(0,229,255,0.25); }

@media (prefers-reduced-motion: no-preference) {
  .btn-primary { animation: ctaPulse 3.4s var(--ease) infinite; }
  @keyframes ctaPulse {
    0%, 100% { box-shadow: var(--glow-cta); }
    50% { box-shadow: 0 0 0 1px rgba(57,255,136,0.6), 0 0 30px 5px rgba(57,255,136,0.55), 0 0 72px 10px rgba(0,229,255,0.22); }
  }
}

/* ---------- feature cards ---------- */
.features { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(258px, 1fr)); }
.card {
  position: relative; overflow: hidden;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card);
  padding: 1.4rem;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary));
  opacity: 0; transition: opacity 0.25s var(--ease);
}
.card:hover { transform: translateY(-3px); border-color: var(--primary); box-shadow: 0 10px 44px -14px rgba(0,229,255,0.4); }
.card:hover::before { opacity: 1; }
.card__icon {
  width: 38px; height: 38px; display: grid; place-items: center; margin-bottom: 0.85rem;
  border-radius: 9px; color: var(--primary);
  background: var(--primary-soft); border: 1px solid var(--border);
}
.card__icon svg { width: 20px; height: 20px; }
.card h3 { margin: 0 0 0.4rem; font-size: 1.12rem; font-weight: 700; }
.card p { margin: 0; color: var(--text-muted); font-size: 0.96rem; }

/* ---------- screenshots gallery ---------- */
.shots { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.shot {
  margin: 0; border: 1px solid var(--border); border-radius: var(--radius-card);
  overflow: hidden; background: var(--surface-soft);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}
.shot a { display: block; }
.shot img { width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: cover; }
.shot figcaption { padding: 0.7rem 0.9rem; color: var(--text-muted); font-size: 0.9rem; border-top: 1px solid var(--border); }
.shot:hover { transform: translateY(-3px); border-color: var(--secondary); box-shadow: 0 10px 44px -14px rgba(255,43,214,0.35); }

/* lightweight CSS-only lightbox */
.lightbox { position: fixed; inset: 0; z-index: 50; display: none; place-items: center; padding: 2rem;
  background: var(--overlay-dim); backdrop-filter: blur(4px); }
.lightbox:target { display: grid; }
.lightbox img { max-width: min(1100px, 94vw); max-height: 88vh; width: auto; border: 1px solid var(--border-soft); border-radius: var(--radius-card); }
.lightbox__close { position: absolute; inset: 1.25rem 1.25rem auto auto; font-size: 1.5rem; color: var(--text); text-decoration: none; }

/* ---------- setup guide ---------- */
.steps { counter-reset: step; display: grid; gap: 0.9rem; padding: 0; margin: 0; list-style: none; }
.steps li {
  position: relative; counter-increment: step;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card);
  padding: 1.1rem 1.25rem 1.1rem 3.6rem;
}
.steps li::before {
  content: counter(step); position: absolute; left: 1rem; top: 1rem;
  width: 1.8rem; height: 1.8rem; border-radius: 50%; display: grid; place-items: center;
  font-weight: 700; font-size: 0.95rem; color: var(--text-on-primary);
  background: linear-gradient(180deg, var(--primary), #00b8cc);
}
.steps strong { color: var(--text); }
.steps p { margin: 0.25rem 0 0; color: var(--text-muted); font-size: 0.95rem; }

/* ---------- code / install ---------- */
.codeblock {
  display: flex; align-items: stretch; gap: 0.75rem; justify-content: space-between;
  background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius-card);
  padding: 0.9rem 0.9rem 0.9rem 1.1rem; overflow: hidden;
}
.codeblock code { white-space: pre; overflow-x: auto; color: var(--text); font-size: 0.92rem; padding-block: 0.2rem; flex: 1; }
.copy-btn {
  align-self: flex-start; background: var(--surface-raised); border: 1px solid var(--border); color: var(--text-muted);
  border-radius: 6px; padding: 0.4rem 0.7rem; cursor: pointer; font: inherit; font-size: 0.82rem; white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.copy-btn:hover { color: var(--text); border-color: var(--primary); }
.copy-btn[data-copied="true"] { color: var(--success); border-color: var(--success); }
.note { color: var(--text-muted); font-size: 0.92rem; }
.note code { color: var(--primary); background: var(--surface); padding: 0.05em 0.4em; border-radius: 5px; }

/* ---------- download details ---------- */
.details {
  background: var(--panel-translucent); border: 1px solid var(--border-soft);
  border-radius: var(--radius-card); padding: 1.4rem 1.6rem;
}
.details dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.6rem 1.4rem; margin: 0; }
.details dt { color: var(--text-muted); }
.details dd { margin: 0; word-break: break-all; }
.details .sha { font-family: ui-monospace, monospace; font-size: 0.85rem; color: var(--primary); }
.badge {
  display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 0.15rem 0.55rem; border-radius: var(--radius-pill); border: 1px solid var(--border);
  color: var(--primary); background: var(--primary-soft);
}

/* ---------- footer ---------- */
.footer {
  margin-top: clamp(2rem, 5vw, 4rem); border-top: 1px solid var(--border);
  color: var(--text-muted); display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding-block: 2rem;
}
.footer a { color: var(--primary); }

/* ---------- utilities ---------- */
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.is-hidden { display: none !important; }

a:focus-visible, button:focus-visible, .btn:focus-visible {
  outline: none; box-shadow: var(--focus-ring); border-radius: 8px;
}

/* ---------- responsive ---------- */
@media (max-width: 560px) {
  .details dl { grid-template-columns: 1fr; gap: 0.2rem 0; }
  .details dt { margin-top: 0.6rem; }
  .footer { flex-direction: column; }
  .hero__cta { flex-direction: column; }
  .hero__cta .btn { width: 100%; justify-content: center; }
}