/* ---------- IMPACT Ballistics: Global Styles ---------- */
:root {
  --bg: #0b0f14;
  --fg: #e9edf1;
  --muted: #a3b0bb;
  --stroke: #293343;

  --od: #556b2f;           /* olive drab */
  --coyote: #8a6f3d;       /* coyote brown */
  --blue: #3db2ff;         /* subtle electric blue accent */

  --card: #101720;
  --card2: #0e141b;
  --shadow: 0 10px 30px rgba(0,0,0,.4);
  --radius: 18px;
  --maxw: 1200px;

  --wm-opacity: .055;      /* watermark opacity (dark) */
  --link: var(--blue);
}

:root.light {
  --bg: #f5f7f9;
  --fg: #0e1216;
  --muted: #5b6875;
  --stroke: #d4dde7;
  --card: #ffffff;
  --card2: #f7f9fb;
  --shadow: 0 10px 24px rgba(0,0,0,.08);
  --wm-opacity: .08;       /* slightly stronger watermark on light */
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
}

/* Watermark on every page */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image: url('/assets/img/logo-watermark.png');
  background-position: center;
  background-repeat: no-repeat;
  background-size: min(80vmin, 900px);
  opacity: var(--wm-opacity);
  pointer-events: none;
  filter: grayscale(100%);
}

a { color: var(--link); text-underline-offset: 2px; }
a:hover { opacity: .9; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }

/* Header / Nav */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in hsl, var(--bg), transparent 15%);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--stroke);
}
.nav {
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.brand {
  display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--fg);
  font-weight: 800; letter-spacing: .3px; font-size: 1.1rem;
}
.brand img { width: 34px; height: 34px; border-radius: 10px; }
.nav-links a {
  margin-left: 18px; color: var(--muted); text-decoration: none; font-weight: 700;
}
.nav-links a:hover { color: var(--fg); }
.theme-toggle { 
  margin-left: 14px; border: 1px solid var(--stroke); background: var(--card); color: var(--fg); 
  border-radius: 999px; padding: 8px 12px; cursor: pointer; font-weight: 800;
}

/* Hero */
.hero { padding: 72px 0 36px; }
.grid { display: grid; gap: 24px; grid-template-columns: 1.2fr 1fr; align-items: center; }
@media (max-width: 980px) { .grid { grid-template-columns: 1fr; } }
h1 { font-size: clamp(32px, 3.6vw, 56px); line-height: 1.1; margin: 0; }
.lead { font-size: clamp(16px, 1.5vw, 20px); color: var(--muted); margin: 14px 0 24px; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 12px 18px; border-radius: 14px; font-weight: 800; text-decoration: none; }
.btn.primary { background: linear-gradient(45deg, var(--od), var(--coyote)); color: #fff; box-shadow: var(--shadow); }
.btn.ghost { border: 1px solid var(--stroke); color: var(--fg); background: var(--card); }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 22px; }
@media (max-width: 1000px) { .cards { grid-template-columns: 1fr 1fr; } }
@media (max-width: 700px) { .cards { grid-template-columns: 1fr; } }
.card { background: var(--card); border: 1px solid var(--stroke); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.card h3 { margin-top: 0; }
.badge { display: inline-block; font-size: .75rem; letter-spacing: .5px; border: 1px solid var(--stroke); background: var(--card2); padding: 6px 10px; border-radius: 999px; margin-right: 8px; }

/* Feature grid with screenshot frames */
.frame {
  border: 1px solid var(--stroke);
  background: var(--card2);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.frame img { width: 100%; display: block; }

/* Help page */
.toc { background: var(--card); border: 1px solid var(--stroke); border-radius: var(--radius); padding: 16px; }
.help-section { margin: 36px 0; }
.help-section h2 { margin: 0 0 8px; }
.step { background: var(--card2); border: 1px solid var(--stroke); border-radius: 14px; padding: 14px; margin: 10px 0; }
figure { margin: 14px 0; }
figcaption { color: var(--muted); font-size: .9rem; margin-top: 6px; }

/* Footer */
.site-footer { margin-top: 40px; padding: 18px 0 40px; border-top: 1px solid var(--stroke); color: var(--muted); }
.small { font-size: .9rem; color: var(--muted); }

/* Utility */
.kicker { text-transform: uppercase; letter-spacing: .12em; font-weight: 900; color: var(--coyote); font-size: .8rem; }
.hr { height: 1px; background: var(--stroke); margin: 22px 0; }
.center { text-align: center; }
.anchor { scroll-margin-top: 84px; }