:root {
  --ink: #142126;
  --muted: #5c6a70;
  --line: #cfd8da;
  --paper: #f5f7f6;
  --surface: #ffffff;
  --accent: #176fa6;
  --accent-dark: #083b69;
  --accent-soft: #eaf4fb;
  --result: #1f5e43;
  --result-soft: #e1eee7;
  --shadow: 0 14px 40px rgba(20, 33, 38, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "IBM Plex Sans", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
}
a { color: inherit; }
button, input, select { font: inherit; }

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  padding: 12px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(245, 247, 246, 0.94);
  backdrop-filter: blur(12px);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-logo { width: 38px; height: 38px; object-fit: contain; }
.brand-copy { display: grid; }
.brand-copy > span, .eyebrow {
  margin: 0;
  color: var(--accent);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
}
.brand strong { font-size: 0.98rem; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.home-link { color: var(--accent-dark); font-weight: 600; text-decoration: none; }
.home-link:hover { text-decoration: underline; }
.header-link, .primary-link, .secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 9px 15px;
  border: 1px solid var(--accent);
  border-radius: 3px;
  color: var(--surface);
  background: var(--accent);
  font-weight: 600;
  text-decoration: none;
  transition: 160ms ease;
}
.header-link:hover, .primary-link:hover { border-color: var(--accent-dark); background: var(--accent-dark); }

.hero, .library, .usage { padding: clamp(48px, 8vw, 110px) clamp(20px, 5vw, 72px); }
.hero {
  padding-bottom: clamp(36px, 6vw, 72px);
  background:
    linear-gradient(90deg, rgba(23, 111, 166, 0.07) 1px, transparent 1px),
    linear-gradient(rgba(23, 111, 166, 0.07) 1px, transparent 1px),
    var(--paper);
  background-size: 34px 34px;
}
.hero-copy { max-width: 850px; }
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 780px;
  margin: 12px 0 20px;
  font-size: clamp(2.8rem, 7vw, 6.5rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
}
h2 { margin-bottom: 0; font-size: clamp(2rem, 4vw, 3.3rem); line-height: 1.08; letter-spacing: -0.035em; }
h3 { line-height: 1.25; }
.lead { max-width: 730px; color: #35474d; font-size: clamp(1.08rem, 2vw, 1.35rem); }

.summary-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 760px;
  margin-top: 42px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.summary-strip div { display: grid; padding: 18px 20px 18px 0; }
.summary-strip div + div { padding-left: 20px; border-left: 1px solid var(--line); }
.summary-strip strong { font-family: "IBM Plex Mono", Consolas, monospace; font-size: 1.55rem; }
.summary-strip span { color: var(--muted); font-size: 0.88rem; }

.filter-panel {
  display: grid;
  grid-template-columns: minmax(260px, 1.7fr) repeat(2, minmax(180px, 1fr)) auto;
  gap: 14px;
  align-items: end;
  margin-top: 48px;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.filter-panel label { display: grid; gap: 7px; font-size: 0.82rem; font-weight: 600; }
.filter-panel input, .filter-panel select {
  width: 100%;
  height: 46px;
  padding: 0 12px;
  border: 1px solid #aebdc0;
  border-radius: 2px;
  color: var(--ink);
  background: var(--surface);
}
.filter-panel input:focus, .filter-panel select:focus, .reset-button:focus, .details-toggle:focus, a:focus-visible {
  outline: 3px solid rgba(23, 111, 166, 0.25);
  outline-offset: 2px;
}
.reset-button { height: 46px; padding: 0 18px; border: 1px solid #86979b; border-radius: 2px; background: transparent; cursor: pointer; }
.reset-button:hover { background: #edf1f0; }

.library { background: var(--surface); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 34px; }
#result-count { margin: 0; color: var(--muted); font-family: "IBM Plex Mono", Consolas, monospace; font-size: 0.86rem; }
.application-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.application-card {
  display: flex;
  flex-direction: column;
  min-height: 325px;
  padding: 26px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  background: var(--paper);
}
.card-index {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 22px;
  color: var(--muted);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.availability { padding: 3px 7px; border: 1px solid #94adaf; color: var(--accent-dark); background: var(--accent-soft); }
.application-card h3 { margin-bottom: 10px; font-size: 1.45rem; letter-spacing: -0.02em; }
.card-summary { color: #43545a; }
.result-line { margin: 10px 0 20px; padding: 10px 12px; border-left: 3px solid var(--result); color: var(--result); background: var(--result-soft); font-weight: 600; }
.details-toggle {
  width: 100%;
  min-height: 44px;
  margin-top: auto;
  padding: 9px 12px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  color: var(--ink);
  background: transparent;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}
.details-toggle::after { float: right; content: "+"; font-family: "IBM Plex Mono", Consolas, monospace; }
.details-toggle[aria-expanded="true"]::after { content: "−"; }
.card-details { padding-top: 22px; }
.card-details[hidden] { display: none; }
.detail-block { padding-top: 16px; border-top: 1px solid var(--line); }
.detail-block h4 { margin: 0 0 6px; font-family: "IBM Plex Mono", Consolas, monospace; font-size: 0.76rem; letter-spacing: 0.05em; text-transform: uppercase; }
.download-links { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
.secondary-link { color: var(--accent-dark); background: transparent; }
.secondary-link:hover { background: var(--accent-soft); }
.no-download { margin: 18px 0 0; color: var(--muted); font-size: 0.9rem; }
.empty-state { padding: 70px 20px; border: 1px dashed #9cadb0; text-align: center; }

.usage { display: grid; grid-template-columns: minmax(250px, 0.85fr) minmax(0, 1.7fr); gap: clamp(35px, 8vw, 110px); background: #e9eeec; }
.usage-columns { display: grid; gap: 0; }
.usage article { padding: 22px 0; border-top: 1px solid #aebbb8; }
.usage article:last-child { border-bottom: 1px solid #aebbb8; }
.usage h3 { margin-bottom: 8px; }
.usage p { margin-bottom: 0; color: #405158; }
.engineering-note { color: var(--accent-dark); }

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px clamp(20px, 5vw, 72px);
  color: #c8d5d7;
  background: #052945;
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 0.75rem;
}
footer a { color: white; }

@media (max-width: 900px) {
  .filter-panel { grid-template-columns: 1fr 1fr; }
  .filter-panel label:first-child { grid-column: 1 / -1; }
  .application-grid, .usage { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .site-header { position: static; align-items: flex-start; }
  .header-actions { align-items: flex-end; flex-direction: column; }
  .header-link { padding: 8px 10px; font-size: 0.8rem; }
  .brand strong { max-width: 190px; }
  .summary-strip { grid-template-columns: 1fr; }
  .summary-strip div + div { padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
  .filter-panel { grid-template-columns: 1fr; }
  .filter-panel label:first-child { grid-column: auto; }
  .section-heading, footer { align-items: flex-start; flex-direction: column; }
  .application-card { padding: 22px 18px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}