/* Smart Sorting Trash Can project site.
   Two accent colors carry meaning: red = trash, blue = recycling. */

@font-face {
  font-family: "Archivo";
  src: url("fonts/archivo-variable.woff2") format("woff2-variations"), url("fonts/archivo-variable.woff2") format("woff2");
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #f2f4f5;
  --surface: #ffffff;
  --ink: #17202a;
  --muted: #56636f;
  --line: #d6dde2;
  --trash: #b8322a;
  --trash-soft: #f6e3e1;
  --recycle: #2565ae;
  --recycle-soft: #e1ebf7;
  --focus: #2565ae;
  --shadow: 0 1px 2px rgba(23, 32, 42, .06), 0 8px 24px -12px rgba(23, 32, 42, .18);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #11161b; --surface: #182029; --ink: #e5eaee; --muted: #9eabb7; --line: #2a3540;
    --trash: #e4675d; --trash-soft: #3a1f1d; --recycle: #6ea7ea; --recycle-soft: #1a2c42; --focus: #6ea7ea;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px -12px rgba(0,0,0,.6);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #11161b; --surface: #182029; --ink: #e5eaee; --muted: #9eabb7; --line: #2a3540;
  --trash: #e4675d; --trash-soft: #3a1f1d; --recycle: #6ea7ea; --recycle-soft: #1a2c42; --focus: #6ea7ea;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px -12px rgba(0,0,0,.6);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px; line-height: 1.6; font-variation-settings: "wdth" 100;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--recycle); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.12; margin: 0; font-variation-settings: "wdth" 116; letter-spacing: -.01em; }
p { margin: 0 0 1em; }

.wrap { width: min(1140px, 100% - 32px); margin-inline: auto; }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* Header */
.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top-row { display: flex; align-items: center; gap: 24px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; font-variation-settings: "wdth" 112; white-space: nowrap; }
.brand-mark { display: inline-flex; gap: 3px; }
.brand-mark i { width: 8px; height: 16px; border-radius: 2px; background: var(--trash); }
.brand-mark i + i { background: var(--recycle); }
.nav { display: flex; gap: 4px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a { color: var(--muted); text-decoration: none; font-size: 15px; font-weight: 500; padding: 6px 10px; border-radius: 6px; white-space: nowrap; }
.nav a:hover { color: var(--ink); background: var(--surface); }
.theme { flex: none; width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 8px; cursor: pointer; }
.theme svg { width: 18px; height: 18px; fill: currentColor; }

/* Hero */
.hero { padding: 64px 0 72px; }
.hero-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 56px; align-items: center; }
.kicker { color: var(--muted); font-weight: 500; margin-bottom: 14px; }
.hero h1 { font-size: clamp(38px, 5.4vw, 64px); font-weight: 800; font-variation-settings: "wdth" 120; letter-spacing: -.02em; margin-bottom: 20px; max-width: 13ch; }
.lede { font-size: 19px; color: var(--muted); max-width: 52ch; }
.stats { display: grid; grid-template-columns: repeat(4, max-content); justify-content: start; gap: 8px 32px; margin: 28px 0 32px; padding: 20px 0 0; border-top: 1px solid var(--line); }
.stats div { display: flex; flex-direction: column-reverse; }
.stats dt { font-size: 14px; color: var(--muted); }
.stats dd { white-space: nowrap; margin: 0; font-size: 26px; font-weight: 700; font-variation-settings: "wdth" 108; font-variant-numeric: tabular-nums; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; min-height: 46px; padding: 0 20px; border-radius: 8px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); font-weight: 600; text-decoration: none; }
.btn:hover { border-color: var(--ink); text-decoration: none; }
.btn-solid { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn-solid:hover { opacity: .9; }
.hero-photo { margin: 0; }
.hero-photo img { border-radius: 14px; box-shadow: var(--shadow); aspect-ratio: 4 / 3; object-fit: cover; }
.hero-photo figcaption { font-size: 14px; color: var(--muted); margin-top: 10px; }

/* Sections */
.section { padding: 88px 0; }
.section-alt { background: var(--surface); border-block: 1px solid var(--line); }
.section-alt .panel { background: var(--bg); }
.section-head { margin-bottom: 40px; max-width: 62ch; }
.section-head h2 { font-size: clamp(30px, 3.6vw, 42px); font-weight: 750; margin-bottom: 10px; }
.section-head p { color: var(--muted); font-size: 18px; margin: 0; }
.sub { font-size: 24px; margin: 56px 0 20px; }

.split { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: start; }
.split + .split { margin-top: 48px; }
.split-flip { grid-template-columns: 1fr 1fr; }
.split-even { grid-template-columns: 1fr 1fr; align-items: stretch; }
.prose { max-width: 60ch; }
.prose h3 { font-size: 20px; margin: 0 0 8px; }
.prose p + h3, .prose ul + h3 { margin-top: 28px; }
.prose p { color: var(--ink); }

.panel { margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.panel img { border-radius: 6px; margin-inline: auto; }
.panel figcaption { font-size: 14px; color: var(--muted); margin-top: 10px; }
.panel-portrait img { aspect-ratio: 4 / 5; max-height: 560px; width: auto; object-fit: cover; }
.panel-dark img { background: #1e1e1e; }
.cad-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.specs { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.specs li { display: grid; grid-template-columns: 9.5em 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.specs span { color: var(--muted); }

/* How it sorts */
.sim-pick { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.chip { font: inherit; font-size: 15px; font-weight: 600; padding: 10px 16px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; }
.chip:hover { border-color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }

.flow { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr) 1.5fr; gap: 12px; }
.flow > li { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px 18px 16px; transition: border-color .25s, box-shadow .25s; }
.flow > li:not(:last-child)::after { content: ""; position: absolute; right: -10px; top: 30px; width: 8px; height: 8px; border-top: 2px solid var(--line); border-right: 2px solid var(--line); transform: rotate(45deg); }
.flow h3 { font-size: 16px; font-variation-settings: "wdth" 108; margin: 10px 0 6px; }
.flow p { font-size: 14.5px; color: var(--muted); margin: 0; }
.flow-n { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; border: 1.5px solid var(--line); font-size: 13px; font-weight: 700; color: var(--muted); transition: background .25s, color .25s, border-color .25s; }
.flow > li.on { border-color: var(--ink); box-shadow: var(--shadow); }
.flow > li.on .flow-n { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.readout { margin-top: 10px !important; padding-top: 10px; border-top: 1px dashed var(--line); font-weight: 600; color: var(--ink) !important; font-variant-numeric: tabular-nums; }
.bins { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
.bin { border-radius: 8px; padding: 12px; border: 1.5px solid transparent; transition: background .25s, border-color .25s, transform .25s; }
.bin b { display: block; font-size: 15px; }
.bin span { display: block; font-size: 13px; color: var(--muted); line-height: 1.4; margin-top: 2px; }
.bin-recycle { background: var(--recycle-soft); }
.bin-recycle b { color: var(--recycle); }
.bin-trash { background: var(--trash-soft); }
.bin-trash b { color: var(--trash); }
.bin.hit { transform: translateY(-2px); }
.bin-recycle.hit { border-color: var(--recycle); }
.bin-trash.hit { border-color: var(--trash); }
.sim[data-done] .bin:not(.hit) { opacity: .45; }
.sim-note { margin: 22px 0 0; color: var(--muted); max-width: 70ch; }

/* Chart */
.chart-panel { padding: 20px; }
.chart svg { width: 100%; height: auto; display: block; overflow: visible; }
.chart .grid { stroke: var(--line); }
.chart .axis-t { fill: var(--muted); font-size: 12px; font-family: inherit; }
.chart .line { fill: none; stroke: var(--recycle); stroke-width: 2.5; }
.chart .dot { fill: var(--surface); stroke: var(--recycle); stroke-width: 2.5; }
.chart .dot-last { fill: var(--recycle); }
.chart .lab { fill: var(--ink); font-size: 13px; font-weight: 600; font-family: inherit; }
.section-alt .chart .dot { fill: var(--bg); }

/* Build log */
.log { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.log figure { margin: 0; }
.log img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; border-radius: 10px; background: var(--surface); border: 1px solid var(--line); }
.log li:first-child img { object-fit: contain; background: #fff; }
.log figcaption { margin-top: 8px; font-weight: 600; font-size: 15px; }

.videos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.video p { margin: 8px 0 0; font-weight: 600; font-size: 15px; }
.video-play, .video iframe { display: block; width: 100%; aspect-ratio: 16 / 9; border: 0; border-radius: 10px; overflow: hidden; }
.video-play { position: relative; padding: 0; cursor: pointer; background: #000; }
.video-play img { width: 100%; height: 100%; object-fit: cover; opacity: .9; }
.video-play:hover img { opacity: 1; }
.play { position: absolute; inset: 0; margin: auto; width: 64px; height: 64px; border-radius: 50%; background: rgba(0,0,0,.65); }
.play::after { content: ""; position: absolute; left: 26px; top: 20px; border-left: 20px solid #fff; border-top: 12px solid transparent; border-bottom: 12px solid transparent; }

/* Team */
.team-photo { margin: 0 0 32px; }
.team-photo img { border-radius: 12px; width: 100%; aspect-ratio: 21 / 9; object-fit: cover; object-position: 50% 68%; }
.people { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(7, 1fr); gap: 20px 16px; }
.people img { aspect-ratio: 1; object-fit: cover; object-position: 50% 22%; border-radius: 50%; width: 88px; margin-bottom: 10px; background: var(--bg); }
.people b { display: block; font-size: 15px; line-height: 1.3; }
.people span { display: block; font-size: 13px; color: var(--muted); line-height: 1.35; }

/* Footer */
.foot { padding: 32px 0 40px; color: var(--muted); font-size: 15px; }
.foot-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; }
.foot p { margin: 0; }

/* Responsive */
@media (max-width: 1000px) {
  .flow { grid-template-columns: 1fr 1fr; }
  .flow > li::after { display: none; }
  .flow-split { grid-column: 1 / -1; }
  .people { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 860px) {
  .hero { padding: 36px 0 56px; }
  .hero-grid, .split, .split-flip, .split-even { grid-template-columns: 1fr; gap: 28px; }
  .hero-photo { order: -1; }
  .stats { grid-template-columns: repeat(2, auto); }
  .log, .videos { grid-template-columns: 1fr 1fr; }
  .section { padding: 64px 0; }
  .nav { display: none; }
  .theme { margin-left: auto; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .flow { grid-template-columns: 1fr; }
  .log, .videos { grid-template-columns: 1fr; }
  .people { grid-template-columns: repeat(2, 1fr); }
  .cad-pair { grid-template-columns: 1fr; }
  .specs li { grid-template-columns: 1fr; gap: 0; }
  .brand { font-size: 15px; white-space: normal; }
}