/* ------------------------------------------------------------------ palette
   Same colours used across the linnps GitHub portfolio. Edit here once,
   the entire site updates.
*/
:root {
  --bg:        #FFFFFF;
  --bg-soft:   #F7F7F5;
  --grid:      #E5E5E5;
  --light:     #CCCCCC;
  --muted:     #7A7A7A;
  --text:      #333333;
  --title:     #3B6EA8;   /* primary blue */
  --title-2:   #9EB7D6;   /* light blue */
  --accent:    #C04040;   /* accent red */
  --accent-2:  #E0B0B0;   /* light red */
}

/* ------------------------------------------------------------------ reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial,
               "Noto Sans", sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg-soft);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--title); text-decoration: none; }
a:hover { text-decoration: underline; }
code, kbd, pre, samp {
  font-family: "JetBrains Mono", ui-monospace, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9em;
}

/* ----------------------------------------------------------------- top nav */
.topnav {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--grid);
  padding: 12px 24px;
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px;
}
.topnav .brand {
  font-weight: 700; color: var(--title);
  font-size: 16px; margin-right: 12px;
}
.topnav .brand:hover { text-decoration: none; }
.topnav a.nav-link {
  font-size: 13px; color: var(--muted);
  padding: 4px 8px; border-radius: 4px;
}
.topnav a.nav-link:hover {
  color: var(--title); background: var(--bg-soft); text-decoration: none;
}
.topnav a.nav-link.active {
  color: var(--title); font-weight: 600;
  background: var(--bg-soft);
}
.topnav .spacer { flex: 1; }
.topnav .ext {
  font-size: 12px; color: var(--muted);
}

/* ------------------------------------------------------------------ layout */
.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 80px 24px;
}
.page header.hero { text-align: center; padding: 16px 0 32px 0; }
.hero h1 {
  font-size: 32px; color: var(--title); font-weight: 800;
  letter-spacing: -0.02em;
}
.hero .tagline {
  margin-top: 8px; color: var(--muted); font-size: 15px;
}
.hero .badges { margin-top: 12px; display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; }

/* --------------------------------------------------------------- 10 cards */
.algo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 24px;
}
.algo-card {
  background: var(--bg);
  border: 1px solid var(--grid);
  border-radius: 10px;
  padding: 18px 20px;
  display: flex; flex-direction: column;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
.algo-card:hover {
  transform: translateY(-2px);
  border-color: var(--title-2);
  box-shadow: 0 4px 14px rgba(59, 110, 168, 0.10);
  text-decoration: none;
}
.algo-card .num {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  color: var(--muted); font-size: 11px; letter-spacing: 0.05em;
}
.algo-card .title {
  font-size: 17px; font-weight: 700; color: var(--title);
  margin: 4px 0 6px 0;
}
.algo-card .desc { font-size: 13px; color: var(--text); opacity: 0.85; flex: 1; }
.algo-card .footer {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 12px;
}
.algo-card .status {
  font-size: 11px; padding: 2px 8px; border-radius: 999px;
  font-weight: 600; letter-spacing: 0.02em;
}
.algo-card .status.live {
  background: rgba(59, 110, 168, 0.12); color: var(--title);
}
.algo-card .status.soon {
  background: var(--bg-soft); color: var(--muted);
}
.algo-card.disabled { cursor: default; opacity: 0.7; }
.algo-card.disabled:hover {
  transform: none; box-shadow: none; border-color: var(--grid);
}

/* ---------------------------------------------------------- inner pages */
.page h2 { color: var(--title); margin: 24px 0 12px 0; font-size: 22px; }
.page h3 { color: var(--text);  margin: 18px 0 8px 0;  font-size: 16px; }
.page p  { margin: 8px 0; }
.page ul { margin: 8px 0 8px 24px; }
.page > section { margin-bottom: 28px; }

.note {
  background: var(--bg);
  border: 1px solid var(--grid);
  border-left: 3px solid var(--title);
  padding: 12px 16px; margin: 16px 0;
  border-radius: 4px;
}
.note .label {
  display: inline-block; font-size: 11px; font-weight: 700;
  color: var(--title); letter-spacing: 0.05em; margin-bottom: 4px;
}

.controls {
  background: var(--bg);
  border: 1px solid var(--grid);
  border-radius: 8px;
  padding: 14px 18px;
  display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: center;
}
.controls label { font-size: 12px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }
.controls input[type="range"] { width: 140px; accent-color: var(--title); }
.controls .value { color: var(--text); font-weight: 600; font-family: "JetBrains Mono", monospace; font-size: 13px; }
.controls button {
  background: var(--title); color: white; border: 0;
  padding: 8px 14px; border-radius: 6px;
  font-size: 13px; font-weight: 600; cursor: pointer;
  transition: background 0.15s ease;
}
.controls button:hover { background: #2C5587; }
.controls button.secondary {
  background: var(--bg); color: var(--text); border: 1px solid var(--light);
}
.controls button.secondary:hover { background: var(--bg-soft); }
.controls .checks { display: flex; gap: 12px; flex-wrap: wrap; }
.controls .checks label {
  flex-direction: row; gap: 6px; align-items: center;
  color: var(--text); font-size: 13px; cursor: pointer;
}

/* ---------------------------------------------------------- footer */
.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 24px 0;
  border-top: 1px solid var(--grid);
  margin-top: 64px;
}
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--title); }

/* -------------- responsive ----------------------------------------- */
@media (max-width: 600px) {
  .topnav { padding: 10px 12px; gap: 4px 10px; }
  .topnav a.nav-link { font-size: 12px; padding: 3px 6px; }
  .hero h1 { font-size: 24px; }
}