/* =============================================================================
 * CAST & REEL — black & white, modern minimal
 * ========================================================================== */
:root {
  --ink:        #0a0a0a;
  --ink-2:      #444;
  --ink-3:      #767676;
  --line:       #e6e6e6;
  --line-2:     #d0d0d0;
  --paper:      #ffffff;
  --paper-2:    #f6f6f4;
  --paper-3:    #efefec;
  --radius:     14px;
  --radius-sm:  8px;
  --wrap:       1180px;
  --header-h:   68px;
  --shadow:     0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.05);
  --font:       "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
  overflow-x: hidden;           /* safety net against accidental horizontal scroll */
  -webkit-text-size-adjust: 100%;
}
img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
.wrap { width: min(100% - 40px, var(--wrap)); margin-inline: auto; }

/* ------------------------------- header --------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  height: var(--header-h);
  display: flex; align-items: center; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark { width: 46px; height: 46px; object-fit: contain; display: block; }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-name {
  font-weight: 900; letter-spacing: .04em; font-size: 1.15rem;
}
.brand-name em { font-style: normal; font-weight: 400; margin: 0 .1em; }
.brand-name.small { font-size: 1rem; }
.brand-tag { font-size: .66rem; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-3); font-weight: 600; }

.main-nav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.main-nav a {
  font-size: .84rem; font-weight: 600; color: var(--ink-2);
  padding: 7px 12px; border-radius: 999px; transition: .15s;
}
.main-nav a:hover { background: var(--paper-3); color: var(--ink); }

.nav-toggle { display: none; background: none; border: 0; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 4px 0; transition: .2s; }

/* --------------------------------- hero --------------------------------- */
.hero { border-bottom: 1px solid var(--line); padding: clamp(48px, 8vw, 96px) 0; }
.hero-eyebrow {
  margin: 0 0 20px; font-size: .72rem; font-weight: 700;
  letter-spacing: .22em; text-transform: uppercase; color: var(--ink-3);
}
.hero-title {
  margin: 0; font-weight: 900; letter-spacing: -.03em;
  font-size: clamp(2.4rem, 6.5vw, 4.6rem); line-height: .98;
}
.hero-lead {
  margin: 24px 0 0; max-width: 46ch; font-size: 1.05rem; color: var(--ink-2);
}
.hero-stats { display: flex; gap: 40px; margin-top: 44px; flex-wrap: wrap; }
.hero-stats .stat b { display: block; font-size: 1.9rem; font-weight: 800; letter-spacing: -.02em; }
.hero-stats .stat span { font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3); font-weight: 600; }

/* ------------------------------- toolbar -------------------------------- */
.toolbar {
  position: sticky; top: var(--header-h); z-index: 40;
  background: rgba(255,255,255,.9);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.toolbar-inner {
  display: flex; align-items: center; gap: 16px; padding: 14px 0; flex-wrap: wrap;
}
.search { position: relative; flex: 1 1 240px; min-width: 0; max-width: 380px; }
.search-icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px; color: var(--ink-3); pointer-events: none; }
.search input {
  width: 100%; padding: 11px 14px 11px 42px; font-size: .92rem;
  border: 1px solid var(--line-2); border-radius: 999px; background: var(--paper);
  transition: .15s;
}
.search input:focus { outline: none; border-color: var(--ink); }

.filters { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.filter { display: flex; align-items: center; gap: 8px; min-width: 0; font-size: .78rem; font-weight: 600; color: var(--ink-3); text-transform: uppercase; letter-spacing: .06em; }
.filter select {
  font-family: inherit; font-size: .88rem; font-weight: 500; color: var(--ink);
  padding: 8px 10px; border: 1px solid var(--line-2); border-radius: var(--radius-sm);
  background: var(--paper); text-transform: none; letter-spacing: 0;
  min-width: 0; max-width: 100%;
}
.filter select:focus { outline: none; border-color: var(--ink); }
.reset {
  border: 1px solid var(--line-2); background: var(--paper); color: var(--ink);
  font-size: .82rem; font-weight: 600; padding: 8px 14px; border-radius: 999px;
}
.reset:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.result-count { margin: 0 0 0 auto; font-size: .82rem; color: var(--ink-3); font-weight: 500; white-space: nowrap; }

/* ------------------------------- catalog -------------------------------- */
.catalog { padding: 40px 0 20px; }
.category { padding-top: 24px; margin-bottom: 20px; }
.category-head { display: flex; align-items: baseline; gap: 16px; padding-bottom: 18px; border-bottom: 2px solid var(--ink); margin-bottom: 28px; }
.category-head h2 { margin: 0; font-size: clamp(1.5rem, 3.5vw, 2.1rem); font-weight: 900; letter-spacing: -.02em; }
.category-head .blurb { margin: 0; color: var(--ink-3); font-size: .9rem; }
.category-head .cat-count { margin-left: auto; font-size: .8rem; color: var(--ink-3); font-weight: 600; white-space: nowrap; }

.group-label {
  grid-column: 1 / -1;
  font-size: .72rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-3); margin: 20px 0 2px;
}
.group-label:first-child { margin-top: 0; }

.grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

/* --------------------------------- card --------------------------------- */
.card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; background: var(--paper); display: flex; flex-direction: column;
  transition: .18s; position: relative; overflow: hidden;
  min-width: 0; overflow-wrap: anywhere;
}
.card:hover { border-color: var(--ink); box-shadow: var(--shadow); transform: translateY(-2px); }
.card-shape {
  height: 96px; margin: -2px 0 16px; padding-bottom: 16px; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
}
.card-shape img { max-height: 100%; max-width: 78%; width: auto; object-fit: contain; display: block; }
.card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.card-model { font-size: 1.5rem; font-weight: 900; letter-spacing: -.02em; line-height: 1; }
.card-strength {
  font-size: .72rem; font-weight: 800; letter-spacing: .02em;
  border: 1.5px solid var(--ink); border-radius: 6px; padding: 3px 7px; white-space: nowrap;
}
.card-name { margin: 12px 0 0; font-size: .98rem; font-weight: 600; letter-spacing: -.01em; }
.card-note { margin: 4px 0 0; font-size: .8rem; color: var(--ink-3); font-style: italic; }

.card-features { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.feat {
  font-size: .68rem; font-weight: 600; letter-spacing: .02em;
  background: var(--ink); color: var(--paper); padding: 3px 8px; border-radius: 999px;
}

.card-meta { margin-top: auto; padding-top: 16px; }
.meta-row { display: flex; gap: 8px; align-items: baseline; padding-top: 12px; }
.meta-row + .meta-row { border-top: 1px solid var(--line); }
.meta-label { flex: 0 0 66px; font-size: .68rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.meta-val { display: flex; flex-wrap: wrap; gap: 5px; }

.chip {
  font-size: .72rem; font-weight: 600; border: 1px solid var(--line-2);
  border-radius: 6px; padding: 2px 7px; color: var(--ink-2);
}
.chip.coat { border-color: var(--ink); color: var(--ink); cursor: pointer; transition: .12s; }
.chip.coat:hover, .chip.coat:focus-visible { background: var(--ink); color: var(--paper); outline: none; }
.sizes { font-size: .82rem; color: var(--ink-2); font-variant-numeric: tabular-nums; }

.card-specs { margin-top: 12px; border-top: 1px solid var(--line); padding-top: 12px; }
.card-specs .spec { display: flex; justify-content: space-between; gap: 12px; font-size: .78rem; padding: 3px 0; }
.card-specs .spec span:first-child { color: var(--ink-3); }
.card-specs .spec span:last-child { font-weight: 600; font-variant-numeric: tabular-nums; }

/* highlight search matches */
mark { background: var(--ink); color: var(--paper); border-radius: 3px; padding: 0 2px; }

/* -------------------------------- empty --------------------------------- */
.empty { text-align: center; padding: 60px 20px; color: var(--ink-3); }
.empty button { background: none; border: 0; color: var(--ink); text-decoration: underline; font-size: 1rem; }

/* ------------------------------ guide modal ----------------------------- */
.guide-modal {
  border: 0; padding: 0; border-radius: var(--radius); color: var(--ink); background: var(--paper);
  width: min(100% - 32px, 980px); max-width: 980px; max-height: 88vh; overflow: hidden;
  box-shadow: 0 24px 70px rgba(0,0,0,.4);
}
.guide-modal::backdrop { background: rgba(10,10,10,.55); backdrop-filter: blur(3px); }
.guide-modal[open] { animation: modal-in .18s ease; }
@keyframes modal-in { from { opacity: 0; transform: translateY(8px) scale(.99); } }
.modal-head {
  position: sticky; top: 0; z-index: 2; background: var(--paper);
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px; border-bottom: 1px solid var(--line);
}
.modal-head h2 { margin: 0; font-size: 1.3rem; font-weight: 900; letter-spacing: -.02em; }
.modal-close {
  width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line-2);
  background: var(--paper); color: var(--ink); font-size: 1.5rem; line-height: 1;
  display: grid; place-items: center;
}
.modal-close:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.modal-body { padding: 26px 22px 30px; overflow: auto; max-height: calc(88vh - 75px); }
.modal-sub { font-size: 1.1rem; font-weight: 900; letter-spacing: -.01em; margin: 0 0 22px; }
.modal-body .chart-title { margin-top: 40px; }

.section-title { font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 900; letter-spacing: -.02em; margin: 0 0 32px; }
.legend-grid { display: grid; gap: 40px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.legend-grid h3 { font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 16px; }
.legend-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.legend-list li { display: flex; gap: 12px; align-items: baseline; }
.legend-list .tag {
  flex: 0 0 auto; min-width: 34px; text-align: center;
  font-size: .7rem; font-weight: 800; padding: 3px 8px; border-radius: 6px;
  background: var(--ink); color: var(--paper);
}
.legend-list .tag.outline { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); }
.legend-list .desc b { font-weight: 700; }
.legend-list .desc span { display: block; font-size: .82rem; color: var(--ink-3); }

/* feature icon box */
.icon-box {
  flex: 0 0 auto; width: 38px; height: 38px; border: 1.5px solid var(--ink);
  border-radius: var(--radius-sm); display: grid; place-items: center; color: var(--ink);
  background: var(--paper);
}
.icon-box svg { width: 22px; height: 22px; display: block; }

/* strength badge box */
.str-box {
  flex: 0 0 auto; min-width: 40px; border: 1.5px solid var(--ink); border-radius: var(--radius-sm);
  text-align: center; line-height: 1; padding: 4px 8px; background: var(--paper);
}
.str-box b { display: block; font-size: .95rem; font-weight: 900; }
.str-box span { display: block; font-size: .5rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); margin-top: 2px; }

/* corrosion chart */
.chart-intro { max-width: 52ch; color: var(--ink-2); margin: -12px 0 24px; font-size: .95rem; }
.corrosion {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; max-width: 620px;
}

/* highlight the clicked coating inside the modal */
.legend-list li.hl { background: var(--paper-3); border-radius: 8px; margin: -4px -8px; padding: 4px 8px; }
.legend-list li.hl .tag { box-shadow: 0 0 0 3px var(--ink); }
.corrosion-svg g.hl rect { fill: #fff; stroke: #0a0a0a; stroke-width: 2.5; }
.corrosion-svg g.hl .mk { fill: #0a0a0a; }
.corrosion-svg { width: 100%; height: auto; display: block; }
.corrosion-svg .zone { font-family: var(--font); font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; fill: var(--ink-3); }
.corrosion-svg .ax { font-family: var(--font); font-size: 11px; font-weight: 600; fill: var(--ink-3); }
.corrosion-svg .axtitle { font-family: var(--font); font-size: 12px; font-weight: 700; letter-spacing: .04em; fill: var(--ink); }
.corrosion-svg .mk { font-family: var(--font); font-size: 12px; font-weight: 800; fill: #fff; }

/* -------------------------------- footer -------------------------------- */
.site-footer { background: var(--ink); color: #fff; padding: 64px 0 32px; }
.footer-inner { display: grid; gap: 40px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.footer-inner h4 { font-size: .74rem; letter-spacing: .16em; text-transform: uppercase; color: #999; margin: 0 0 14px; }
.footer-inner p { margin: 0; color: #ccc; font-size: .9rem; line-height: 1.65; }
.footer-inner a { color: #fff; text-decoration: underline; text-underline-offset: 3px; }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  margin-top: 48px; padding-top: 24px; border-top: 1px solid #2a2a2a;
  font-size: .8rem; color: #888; flex-wrap: wrap;
}
.footer-bottom .brand-name { color: #fff; }

/* -------------------------------- to top -------------------------------- */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 60;
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center; font-size: 1.1rem;
  background: var(--ink); color: #fff; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transform: translateY(8px); transition: .2s;
}
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }

/* ------------------------------ responsive ------------------------------ */
@media (max-width: 860px) {
  .main-nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; gap: 0; background: var(--paper);
    border-bottom: 1px solid var(--line); padding: 8px 20px 16px;
    transform: translateY(-120%); transition: transform .25s; box-shadow: var(--shadow);
    max-height: calc(100dvh - var(--header-h)); overflow-y: auto;
  }
  .main-nav.open { transform: none; }
  .main-nav a { padding: 14px 8px; border-radius: var(--radius-sm); border-bottom: 1px solid var(--line); font-size: .95rem; }
  .main-nav a:last-child { border-bottom: 0; }
  .nav-toggle { display: block; margin-left: auto; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
  .result-count { width: 100%; margin: 4px 0 0; }
  .catalog { padding: 28px 0 16px; }
}

@media (max-width: 600px) {
  /* tighter page gutters on phones */
  .wrap { width: min(100% - 32px, var(--wrap)); }
  /* toolbar: search on its own line, filters share the next line */
  .search { flex: 1 1 100%; max-width: none; }
  .filters { width: 100%; }
  .filter { flex: 1 1 0; }
  .filter select { flex: 1 1 0; width: 100%; }
  /* 16px form controls stop iOS from zooming on focus */
  .search input, .filter select { font-size: 16px; }

  .grid { gap: 12px; }
  .card { padding: 16px; }
  .card-model { font-size: 1.35rem; }

  .category { padding-top: 12px; }
  .category-head { flex-wrap: wrap; gap: 6px 14px; margin-bottom: 22px; padding-bottom: 14px; }
  .category-head .blurb { flex: 1 1 100%; order: 3; }
  .category-head .cat-count { margin-left: auto; }

  .hero-stats { gap: 24px 28px; }
  .hero-stats .stat b { font-size: 1.6rem; }
  .hero-lead { font-size: 1rem; }

  /* modal fills more of the screen and scrolls comfortably */
  .guide-modal { width: min(100% - 20px, 980px); max-height: 92dvh; border-radius: var(--radius); }
  .modal-head { padding: 15px 18px; }
  .modal-head h2 { font-size: 1.15rem; }
  .modal-body { padding: 20px 18px 26px; max-height: calc(92dvh - 66px); }
  .legend-grid { gap: 28px; grid-template-columns: 1fr; }
  .modal-body .chart-title { margin-top: 28px; }
  .corrosion { padding: 12px; }
}

@media (max-width: 380px) {
  .grid { grid-template-columns: 1fr; }
  .brand-tag { display: none; }
  .hero-title { font-size: clamp(2rem, 9vw, 2.6rem); }
}

/* larger tap targets on touch / coarse pointers */
@media (hover: none) and (pointer: coarse) {
  .chip.coat { padding: 5px 10px; }
  .main-nav a { padding: 14px 12px; }
}