/* ==========================================================================
   Where Victoria's Rubbish Goes
   FIT3179 Data Visualisation 2 — Rohan Pant

   Palette comes from the object itself: the four standard Australian bin lids
   are the only saturated colours on the page, and the neutrals are the
   grey-green of a wheelie bin body and the grey of kerb concrete.
   ========================================================================== */

/* ---------- typefaces, self-hosted, no third-party request ---------------- */
@font-face {
  font-family: "Archivo";
  src: url("../fonts/archivo.woff2") format("woff2");
  font-weight: 400 800; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Source Serif 4";
  src: url("../fonts/source-serif-4.woff2") format("woff2");
  font-weight: 400 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Source Serif 4";
  src: url("../fonts/source-serif-4-italic.woff2") format("woff2");
  font-weight: 400 700; font-style: italic; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/ibm-plex-mono-400.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/ibm-plex-mono-500.woff2") format("woff2");
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/ibm-plex-mono-600.woff2") format("woff2");
  font-weight: 600; font-style: normal; font-display: swap;
}

/* ---------- tokens -------------------------------------------------------- */
:root {
  --depot:     #191E1A;   /* wheelie-bin body, used for the dark bands */
  --depot-2:   #222923;
  --concrete:  #E8E9E3;   /* kerb concrete, the light band ground */
  --surface:   #F7F8F4;   /* chart cards sitting on the concrete */
  --ink:       #15181A;
  --ink-soft:  #4A5147;
  --muted:     #6E7569;
  --faint:     #9AA096;
  --rule:      #D2D6CC;
  --rule-dark: #333B34;

  /* the four bin lids — reserved for waste streams, nothing else */
  --garbage:   #C8372D;
  --recycling: #E3A008;
  --organics:  #7FB539;
  --glass:     #7A52C7;

  --good:      #2E6B3E;

  --display: "Archivo", system-ui, sans-serif;
  --serif:   "Source Serif 4", Georgia, serif;
  --mono:    "IBM Plex Mono", ui-monospace, monospace;

  --measure: 36em;
  --gutter:  clamp(1.1rem, 4vw, 3rem);
  --maxw:    1180px;
}

/* ---------- base ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--concrete);
  color: var(--ink);
  font: 400 17px/1.65 var(--serif);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.022em;
  text-wrap: balance;
}

p { margin: 0; }

a { color: var(--good); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--good); outline-offset: 3px;
}

strong { font-weight: 700; }
.num { font-variant-numeric: tabular-nums; }

/* ---------- bands: full-bleed, alternating ground ------------------------- */
.band { width: 100%; padding-block: clamp(3.5rem, 7vw, 6rem); }
.band--dark  { background: var(--depot); color: #E7EAE4; }
.band--light { background: var(--concrete); }
.band--paper { background: var(--surface); }

.inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- type scale, one size per role --------------------------------- */
.eyebrow {
  display: block;
  font: 600 11px/1 var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.1rem;
}
.band--dark .eyebrow { color: #8E9A8C; }

.h-hero    { font-size: clamp(2.7rem, 7.5vw, 5.2rem); font-weight: 800; line-height: 0.98; letter-spacing: -0.035em; }
.h-section { font-size: clamp(1.75rem, 3.4vw, 2.45rem); font-weight: 700; }
.h-chart   { font-size: 1.0625rem; font-weight: 700; line-height: 1.3; letter-spacing: -0.012em; }

.lede {
  font-size: clamp(1.1rem, 1.9vw, 1.32rem);
  line-height: 1.55;
  max-width: 32em;
  color: var(--ink-soft);
}
.band--dark .lede { color: #C3CBC1; }

.prose { max-width: var(--measure); }
.prose + .prose { margin-top: 1rem; }

/* ---------- hero ---------------------------------------------------------- */
.hero { padding-block: clamp(4.5rem, 11vw, 8.5rem) clamp(3rem, 6vw, 4.5rem); }
.hero .h-hero { color: #F2F5EF; max-width: 14ch; }
.hero .lede { margin-top: 1.6rem; }

/* the lid bar — the page's signature device, and a real chart */
.lidbar {
  display: flex;
  height: 30px;
  margin-top: clamp(2.2rem, 5vw, 3.4rem);
  border-radius: 2px;
  overflow: hidden;
}
.lidbar span { display: block; height: 100%; }
.lidbar--thin { height: 8px; margin-top: 0; }

.lidkey {
  display: flex; flex-wrap: wrap; gap: 1.1rem 1.9rem;
  margin-top: 1rem;
  font: 500 12px/1.4 var(--mono);
  color: #A9B3A6;
}
.band--light .lidkey, .band--paper .lidkey { color: var(--muted); }
.lidkey i {
  display: inline-block; width: 11px; height: 11px;
  border-radius: 2px; margin-right: 0.5rem; vertical-align: baseline;
}
.lidkey b { font-weight: 600; color: inherit; }

/* ---------- section head -------------------------------------------------- */
.sectionhead { max-width: 46em; margin-bottom: clamp(2rem, 4vw, 3rem); }
.sectionhead .h-section { margin-bottom: 1rem; }
.sectionhead .prose { color: var(--ink-soft); }

/* ---------- the turn: dark interstitial ----------------------------------- */
.turn .h-section { color: #F2F5EF; max-width: 18ch; font-size: clamp(1.9rem, 4vw, 3rem); }
.turn .lede { margin-top: 1.4rem; max-width: 34em; }

/* ---------- stat row ------------------------------------------------------ */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--rule);
  border-block: 1px solid var(--rule);
  margin-top: clamp(2.2rem, 4vw, 3.2rem);
}
.band--dark .stats { background: var(--rule-dark); border-color: var(--rule-dark); }

.stat { background: var(--concrete); padding: 1.3rem 1.2rem 1.5rem; }
.band--dark  .stat { background: var(--depot); }
.band--paper .stat { background: var(--surface); }

.stat b {
  display: block;
  font: 800 clamp(2rem, 3.6vw, 2.9rem)/1 var(--display);
  letter-spacing: -0.035em;
  font-variant-numeric: tabular-nums;
  margin-bottom: 0.45rem;
}
.stat span { font-size: 13.5px; line-height: 1.4; color: var(--muted); display: block; }
.band--dark .stat span { color: #96A094; }

/* ---------- chart cards --------------------------------------------------- */
.spread {
  display: grid;
  grid-template-columns: minmax(0, 1.9fr) minmax(16rem, 1fr);
  gap: clamp(1.5rem, 3vw, 2.75rem);
  align-items: start;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
/* reversed spread has to swap the COLUMN WIDTHS too, not just the order,
   or the chart lands in the narrow column and scrolls inside its card */
.spread--reverse { grid-template-columns: minmax(16rem, 1fr) minmax(0, 1.9fr); }
.spread--reverse > .card { order: 2; }
.spread--reverse > .note { order: 1; }
.spread--full { grid-template-columns: minmax(0, 1fr); }
.pair { display: grid; grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr)); gap: clamp(1.2rem, 2.5vw, 2rem); }

.card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 1.2rem 1.3rem 1.4rem;
  min-width: 0;
}
.band--paper .card { background: #FFFFFF; }

.card__head { margin-bottom: 1rem; }
.card__head .eyebrow { margin-bottom: 0.5rem; }
.card__head .h-chart { margin-bottom: 0.35rem; }
.card__head p {
  font-size: 13.5px; line-height: 1.5; color: var(--muted); max-width: 52em;
}

.chart { overflow-x: auto; margin-inline: -0.2rem; }
.chart--centre { display: flex; justify-content: center; }
.chart > div { min-height: 60px; }

.card__foot {
  margin-top: 0.9rem; padding-top: 0.8rem;
  border-top: 1px solid var(--rule);
  font: 400 11.5px/1.5 var(--mono);
  color: var(--faint);
}

/* the note column beside a chart */
.note { padding-top: 0.4rem; }
.note h4 {
  font-size: 12px; font-family: var(--mono); font-weight: 600;
  letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 0.7rem;
}
.note p { font-size: 15px; line-height: 1.6; color: var(--ink-soft); }
.note p + p { margin-top: 0.8rem; }
.note .big {
  font: 800 2.3rem/1 var(--display); letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums; color: var(--ink);
  display: block; margin-bottom: 0.3rem;
}

/* ---------- bin explainer ------------------------------------------------- */
.bins { display: grid; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); gap: 1.1rem; margin-top: 2rem; }
.bin {
  background: var(--surface); border: 1px solid var(--rule); border-radius: 3px;
  padding: 0 0 1rem; overflow: hidden;
}
.bin i { display: block; height: 9px; }
.bin h4 { font-size: 15px; font-weight: 700; margin: 0.95rem 1rem 0.4rem; }
.bin p { font-size: 13.5px; line-height: 1.5; color: var(--muted); margin: 0 1rem; }
.bin .amt {
  display: block; margin: 0.7rem 1rem 0;
  font: 600 12px/1 var(--mono); color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

/* ---------- glossary / framing -------------------------------------------- */
.framing { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 1.6rem 2.2rem; margin-top: 2.2rem; }
.framing div h4 {
  font: 600 11px/1 var(--mono); letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--good); margin-bottom: 0.6rem;
}
.framing div p { font-size: 14.5px; line-height: 1.6; color: var(--ink-soft); }

/* ---------- footer -------------------------------------------------------- */
.colophon { color: #B4BCB1; }
.colophon .h-section { color: #F2F5EF; font-size: 1.3rem; margin-bottom: 1.4rem; }
.colophon h4 {
  font: 600 11px/1 var(--mono); letter-spacing: 0.16em; text-transform: uppercase;
  color: #8E9A8C; margin: 2rem 0 0.8rem;
}
.colophon p, .colophon li { font-size: 13.5px; line-height: 1.65; }
.colophon ul { margin: 0; padding-left: 1.1rem; max-width: 58em; }
.colophon li { margin-bottom: 0.5rem; }
.colophon a { color: #9FD4B4; }

/* ---------- motion, once, and only if welcome ----------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .lidbar span { animation: wipe 900ms cubic-bezier(.2,.7,.3,1) both; }
  .lidbar span:nth-child(2) { animation-delay: 90ms; }
  .lidbar span:nth-child(3) { animation-delay: 180ms; }
  .lidbar span:nth-child(4) { animation-delay: 270ms; }
  @keyframes wipe { from { transform: scaleX(0); transform-origin: left; } }
}

/* ---------- responsive ---------------------------------------------------- */
@media (max-width: 900px) {
  .spread { grid-template-columns: minmax(0, 1fr); }
  .spread--reverse { grid-template-columns: minmax(0, 1fr); }
  .spread--reverse > .card { order: 0; }
  .spread--reverse > .note { order: 1; }
  body { font-size: 16px; }
}