/* ==================================================================
   Brisbane Skips - design system
   Display: Archivo (industrial, expanded weights)
   Body:    IBM Plex Sans (engineering legibility)
   Data:    IBM Plex Mono (prices, tonnage, spec-sheet readouts)
================================================================== */

:root {
  /* palette */
  --ink:       #16191A;   /* near-black steel */
  --steel:     #23292B;   /* dark slate surface */
  --steel-2:   #2E3639;   /* raised slate */
  --concrete:  #F1EFE9;   /* warm concrete page bg */
  --concrete-2:#E6E3DA;   /* recessed concrete */
  --paper:     #FBFAF6;   /* cards on concrete */
  --yellow:    #FFC400;   /* skip-bin safety yellow (signature) */
  --yellow-hi: #FFD34D;
  --yellow-lo: #E3A600;
  --green:     #2C6B4C;   /* recycling green, used sparingly */
  --green-hi:  #E4EFE7;
  --line:      #D8D4C8;   /* hairline on concrete */
  --line-dk:   #3A4245;   /* hairline on steel */
  --muted:     #6C6A60;   /* secondary text on concrete */
  --muted-dk:  #9AA3A1;   /* secondary text on steel */

  --radius:    14px;
  --radius-sm: 9px;
  --shadow:    0 1px 2px rgba(20,25,26,.06), 0 12px 30px -14px rgba(20,25,26,.22);
  --shadow-lg: 0 2px 4px rgba(20,25,26,.08), 0 30px 60px -22px rgba(20,25,26,.35);

  --maxw: 1180px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---- reset ---- */
*,*::before,*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}
body {
  margin: 0;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  color: var(--ink);
  background: var(--concrete);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; }
:focus-visible { outline: 3px solid var(--yellow-lo); outline-offset: 2px; border-radius: 4px; }

/* ---- type ---- */
h1,h2,h3,h4 {
  font-family: "Archivo", system-ui, sans-serif;
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -.015em;
  margin: 0;
}
.display {
  font-family: "Archivo", sans-serif;
  font-weight: 900;
  font-stretch: 125%;
  text-transform: uppercase;
  letter-spacing: -.01em;
}
.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--green);
}
.eyebrow.on-dark { color: var(--yellow); }
.mono { font-family: "IBM Plex Mono", monospace; font-variant-numeric: tabular-nums; }

/* ---- layout ---- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section--tight { padding: 64px 0; }
.stack > * + * { margin-top: 1rem; }
.center { text-align: center; }

/* ---- buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55em;
  padding: 15px 26px;
  border-radius: 999px;
  font-family: "Archivo", sans-serif;
  font-weight: 800;
  letter-spacing: .01em;
  line-height: 1;
  transition: transform .15s var(--ease), background .2s, box-shadow .2s, color .2s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn--primary { background: var(--yellow); color: var(--ink); box-shadow: 0 8px 20px -8px rgba(227,166,0,.7); }
.btn--primary:hover { background: var(--yellow-hi); }
.btn--dark { background: var(--ink); color: var(--paper); }
.btn--dark:hover { background: var(--steel); }
.btn--ghost { border: 1.5px solid var(--ink); color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--lg { padding: 18px 32px; font-size: 1.05rem; }
.btn--block { display: flex; width: 100%; }

/* ================= HEADER ================= */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--concrete) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 28px; height: 74px; }
.brand { display: flex; align-items: center; gap: 11px; font-family: "Archivo", sans-serif; font-weight: 900; font-stretch: 125%; text-transform: uppercase; font-size: 1.18rem; letter-spacing: -.01em; }
.brand__mark { width: 34px; height: 26px; flex: none; }
.brand small { display:block; font-family:"IBM Plex Mono",monospace; font-weight:500; font-size:.5rem; letter-spacing:.28em; color: var(--muted); margin-top: 2px; }
.nav__links { display: flex; gap: 26px; margin-left: auto; }
.nav__links a { font-weight: 500; font-size: .96rem; color: var(--steel); position: relative; padding: 4px 0; }
.nav__links a::after { content:""; position:absolute; left:0; bottom:-2px; width:0; height:2px; background: var(--yellow-lo); transition: width .22s var(--ease); }
.nav__links a:hover::after { width: 100%; }
.nav__cta { display: flex; align-items: center; gap: 14px; }
.nav__phone { font-family:"IBM Plex Mono",monospace; font-weight:600; font-size:.95rem; }
.nav__toggle { display: none; width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--line); align-items:center; justify-content:center; }
.nav__toggle span, .nav__toggle span::before, .nav__toggle span::after { content:""; display:block; width:20px; height:2px; background: var(--ink); position: relative; transition: .2s; }
.nav__toggle span::before { position:absolute; top:-6px; } .nav__toggle span::after { position:absolute; top:6px; }

/* ================= HERO ================= */
.hero { position: relative; overflow: hidden; padding: 84px 0 96px; }
.hero__grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(2.7rem, 6vw, 5rem); }
.hero h1 .hl { color: var(--yellow-lo); }
.hero__lead { font-size: 1.2rem; color: var(--steel); max-width: 46ch; margin-top: 22px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero__trust { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 34px; padding-top: 26px; border-top: 1px solid var(--line); }
.trust-item { display:flex; align-items:center; gap:9px; font-size:.92rem; font-weight:500; color: var(--steel); }
.trust-item svg { color: var(--green); flex: none; }

/* hero bin visual (signature) */
.hero__visual { position: relative; display:flex; align-items:center; justify-content:center; min-height: 360px; }
.hero__visual .skip-illustration { width: 100%; max-width: 480px; filter: drop-shadow(0 40px 40px rgba(20,25,26,.18)); }
.hero__badge {
  position: absolute; top: 8px; right: 4px;
  background: var(--ink); color: var(--paper);
  font-family:"IBM Plex Mono",monospace; font-size:.72rem; letter-spacing:.12em;
  padding: 10px 14px; border-radius: 10px; transform: rotate(3deg);
  box-shadow: var(--shadow);
}
.hero__badge b { color: var(--yellow); }
.hero__floor { position:absolute; inset:auto 0 40px; height:2px; background: linear-gradient(90deg, transparent, var(--line), transparent); }

/* ================= QUICK QUOTE (home) ================= */
.qq {
  background: var(--steel); color: var(--paper);
  border-radius: 22px; padding: 40px; box-shadow: var(--shadow-lg);
}
.qq h2 { color: var(--paper); font-size: 1.7rem; }
.qq__row { display:flex; gap:10px; flex-wrap:wrap; margin: 22px 0 18px; }
.chip {
  flex: 1 1 auto; min-width: 96px;
  padding: 13px 10px; border-radius: 12px;
  border: 1.5px solid var(--line-dk); background: var(--steel-2);
  color: var(--paper); font-weight: 600; font-size: .95rem;
  display:flex; flex-direction:column; align-items:center; gap:2px;
  transition: .18s var(--ease);
}
.chip small { font-family:"IBM Plex Mono",monospace; font-size:.66rem; color: var(--muted-dk); letter-spacing:.05em; }
.chip[aria-pressed="true"] { border-color: var(--yellow); background: color-mix(in srgb, var(--yellow) 16%, var(--steel-2)); }
.chip[aria-pressed="true"] small { color: var(--yellow-hi); }
.qq__readout { display:flex; align-items:baseline; justify-content:space-between; gap:16px; padding-top:18px; border-top:1px solid var(--line-dk); }
.qq__price { font-family:"IBM Plex Mono",monospace; font-weight:600; }
.qq__price .num { font-size: 2.6rem; color: var(--yellow); letter-spacing:-.02em; }
.qq__price .from { font-size:.8rem; color: var(--muted-dk); display:block; letter-spacing:.12em; text-transform:uppercase; }

/* ================= GENERIC SECTIONS ================= */
.section-head { max-width: 60ch; }
.section-head h2 { font-size: clamp(2rem, 3.6vw, 3rem); margin-top: 10px; }
.section-head p { color: var(--muted); font-size: 1.1rem; margin-top: 14px; }

/* bins grid */
.bins { display:grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 44px; }
.bin-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; display:flex; flex-direction:column; gap: 6px; position: relative;
  transition: transform .2s var(--ease), box-shadow .2s;
}
.bin-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.bin-card__size { font-family:"Archivo",sans-serif; font-weight:900; font-stretch:125%; font-size: 2.2rem; line-height: 1; }
.bin-card__size sup { font-size: .9rem; color: var(--muted); }
.bin-card__suits { color: var(--muted); font-size:.92rem; min-height: 3.6em; }
.bin-card__price { font-family:"IBM Plex Mono",monospace; font-weight:600; font-size:1.2rem; margin-top: 8px; }
.bin-card__price small { color: var(--muted); font-weight:500; font-size:.7rem; letter-spacing:.1em; text-transform:uppercase; display:block; }
.bin-card__tag {
  position:absolute; top:16px; right:16px;
  font-family:"IBM Plex Mono",monospace; font-size:.62rem; letter-spacing:.1em; text-transform:uppercase;
  background: var(--yellow); color: var(--ink); padding:5px 9px; border-radius:99px; font-weight:600;
}
.bin-card__tag.is-green { background: var(--green); color: #fff; }

/* process / how it works */
.steps { display:grid; grid-template-columns: repeat(3,1fr); gap: 20px; margin-top:44px; counter-reset: step; }
.step { background: var(--paper); border:1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.step__n { font-family:"IBM Plex Mono",monospace; font-size:.8rem; color: var(--green); letter-spacing:.15em; }
.step h3 { font-size:1.3rem; margin:12px 0 8px; }
.step p { color: var(--muted); font-size:.96rem; margin:0; }

/* split feature (recycling / why us) */
.split { display:grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items:center; }
.feature-list { list-style:none; margin: 22px 0 0; padding: 0; }
.feature-list li { display:flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.feature-list li:last-child { border-bottom: 0; }
.feature-list .ic { flex:none; width:42px; height:42px; border-radius:11px; background: var(--green-hi); color: var(--green); display:flex; align-items:center; justify-content:center; }
.feature-list h4 { font-size:1.05rem; }
.feature-list p { margin:3px 0 0; color: var(--muted); font-size:.94rem; }
.panel-dark {
  background: var(--steel); color: var(--paper); border-radius: 22px; padding: 40px;
  background-image: radial-gradient(circle at 100% 0%, rgba(255,196,0,.14), transparent 55%);
}
.panel-dark .eyebrow { color: var(--yellow); }
.panel-dark h2 { color: var(--paper); font-size: 2.1rem; margin-top: 8px; }
.panel-dark p { color: var(--muted-dk); }
.stat-row { display:flex; gap: 30px; flex-wrap:wrap; margin-top: 28px; }
.stat .n { font-family:"Archivo",sans-serif; font-weight:900; font-stretch:125%; font-size: 2.6rem; color: var(--yellow); line-height:1; }
.stat .l { font-size:.85rem; color: var(--muted-dk); margin-top:6px; }

/* prohibited strip */
.notice { display:flex; gap:16px; align-items:flex-start; background: var(--paper); border:1px solid var(--line); border-left: 4px solid var(--yellow-lo); border-radius: 12px; padding: 20px 22px; }
.notice svg { flex:none; color: var(--yellow-lo); }
.notice b { font-family:"Archivo",sans-serif; }
.tags { display:flex; flex-wrap:wrap; gap:8px; margin-top:10px; }
.tag { font-family:"IBM Plex Mono",monospace; font-size:.78rem; background: var(--concrete-2); border-radius:99px; padding:5px 12px; }

/* FAQ */
.faq { max-width: 820px; margin: 44px auto 0; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { display:flex; justify-content:space-between; align-items:center; gap: 16px; padding: 22px 4px; font-family:"Archivo",sans-serif; font-weight:700; font-size:1.15rem; list-style:none; cursor:pointer; }
.faq summary::-webkit-details-marker { display:none; }
.faq summary .plus { flex:none; width:26px; height:26px; position:relative; transition: transform .25s var(--ease); }
.faq summary .plus::before, .faq summary .plus::after { content:""; position:absolute; inset:0; margin:auto; background: var(--ink); }
.faq summary .plus::before { width:16px; height:2px; } .faq summary .plus::after { width:2px; height:16px; }
.faq details[open] summary .plus { transform: rotate(45deg); }
.faq details p { margin: 0 4px 22px; color: var(--muted); }

/* service areas */
.areas { display:flex; flex-wrap:wrap; gap:10px; margin-top: 28px; }
.area { background:var(--paper); border:1px solid var(--line); border-radius:99px; padding:9px 16px; font-size:.92rem; font-weight:500; }

/* CTA band */
.cta-band { background: var(--yellow); border-radius: 24px; padding: 56px; display:flex; align-items:center; justify-content:space-between; gap: 32px; flex-wrap:wrap; }
.cta-band h2 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); max-width: 20ch; }
.cta-band p { margin-top:10px; color: var(--steel); font-weight:500; }

/* ================= FOOTER ================= */
.site-footer { background: var(--ink); color: var(--concrete); padding: 64px 0 34px; margin-top: 0; }
.foot-grid { display:grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; }
.site-footer .brand { color: var(--paper); }
.site-footer p { color: var(--muted-dk); font-size:.95rem; }
.foot-col h4 { font-family:"IBM Plex Mono",monospace; font-size:.72rem; letter-spacing:.2em; text-transform:uppercase; color: var(--yellow); font-weight:600; }
.foot-col ul { list-style:none; margin:16px 0 0; padding:0; display:flex; flex-direction:column; gap:11px; }
.foot-col a { color: var(--concrete); font-size:.95rem; opacity:.85; } .foot-col a:hover { opacity:1; color: var(--yellow); }
.foot-bottom { display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--line-dk); font-size:.85rem; color: var(--muted-dk); }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ================= RESPONSIVE ================= */
@media (max-width: 960px) {
  .hero__grid { grid-template-columns: 1fr; gap: 36px; }
  .hero__visual { order: -1; min-height: 260px; }
  .bins { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .section { padding: 68px 0; }
  .nav__links, .nav__phone { display: none; }
  .nav__toggle { display: inline-flex; }
  .nav.is-open .nav__links { display:flex; position:absolute; top:74px; left:0; right:0; flex-direction:column; background: var(--concrete); border-bottom:1px solid var(--line); padding: 16px 24px; gap: 4px; }
  .nav.is-open .nav__links a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .cta-band { padding: 36px; }
  .qq, .panel-dark { padding: 28px; }
  .foot-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 460px) {
  .bins { grid-template-columns: 1fr; }
}

/* ==================================================================
   QUOTE APP  (quote.html)
================================================================== */
.app { min-height: 100vh; display: flex; flex-direction: column; background: var(--concrete); }
.app-header { border-bottom: 1px solid var(--line); background: var(--concrete); }
.app-header .nav { height: 66px; }
.app-back { display:flex; align-items:center; gap:8px; font-weight:600; font-size:.92rem; color: var(--steel); margin-left:auto; }
.app-back svg { transition: transform .18s var(--ease); }
.app-back:hover svg { transform: translateX(-3px); }

/* progress rail */
.progress { display:flex; gap: 6px; padding: 18px 0; }
.progress__seg { flex:1; display:flex; flex-direction:column; gap:8px; }
.progress__bar { height:5px; border-radius:99px; background: var(--concrete-2); overflow:hidden; }
.progress__bar span { display:block; height:100%; width:0; background: var(--yellow); transition: width .4s var(--ease); }
.progress__seg.done .progress__bar span, .progress__seg.active .progress__bar span { width:100%; }
.progress__seg.active .progress__bar span { background: var(--yellow); }
.progress__label { font-family:"IBM Plex Mono",monospace; font-size:.68rem; letter-spacing:.12em; text-transform:uppercase; color: var(--muted); }
.progress__seg.active .progress__label { color: var(--ink); font-weight:600; }
.progress__seg.done .progress__label { color: var(--green); }

/* app body: form + sticky summary */
.app-body { flex:1; display:grid; grid-template-columns: 1fr 372px; gap: 44px; align-items:start; padding: 20px 0 80px; }
.step-panel { min-height: 380px; }
.step-panel[hidden] { display:none; }
.step-title { font-size: clamp(1.6rem, 3.2vw, 2.3rem); }
.step-sub { color: var(--muted); margin: 10px 0 30px; font-size:1.05rem; }

/* waste-type selector */
.waste-grid { display:grid; grid-template-columns: repeat(3,1fr); gap:16px; }
.opt-card {
  text-align:left; background: var(--paper); border:1.5px solid var(--line); border-radius: var(--radius);
  padding: 22px; transition: .18s var(--ease); display:flex; flex-direction:column; gap:8px; position:relative;
}
.opt-card:hover { border-color: var(--muted); transform: translateY(-2px); }
.opt-card[aria-pressed="true"] { border-color: var(--ink); box-shadow: 0 0 0 3px var(--yellow); }
.opt-card__ic { width:46px; height:46px; border-radius:12px; background: var(--concrete-2); display:flex; align-items:center; justify-content:center; color: var(--steel); }
.opt-card[aria-pressed="true"] .opt-card__ic { background: var(--yellow); color: var(--ink); }
.opt-card h3 { font-size:1.2rem; }
.opt-card p { color: var(--muted); font-size:.9rem; margin:0; }
.opt-card__check { position:absolute; top:16px; right:16px; width:24px; height:24px; border-radius:50%; border:2px solid var(--line); display:flex; align-items:center; justify-content:center; transition:.18s; }
.opt-card[aria-pressed="true"] .opt-card__check { background: var(--ink); border-color: var(--ink); }
.opt-card__check svg { opacity:0; color:#fff; } .opt-card[aria-pressed="true"] .opt-card__check svg { opacity:1; }

/* size selector - the signature */
.size-stage { background: var(--steel); border-radius: 20px; padding: 30px; color: var(--paper); margin-bottom: 22px; display:grid; grid-template-columns: 1fr 260px; gap:24px; align-items:center; }
.size-stage__viz { display:flex; align-items:flex-end; justify-content:center; min-height: 230px; }
.size-stage__viz svg { width: 100%; max-width: 340px; transition: transform .45s var(--ease); }
.size-stage__facts .cap-label { font-family:"IBM Plex Mono",monospace; font-size:.7rem; letter-spacing:.16em; text-transform:uppercase; color: var(--muted-dk); }
.size-stage__facts .cap-size { font-family:"Archivo",sans-serif; font-weight:900; font-stretch:125%; font-size: 3.4rem; line-height:1; }
.size-stage__facts .cap-size sup { font-size:1.1rem; color: var(--yellow); }
.size-stage__facts .cap-suits { color: var(--muted-dk); font-size:.92rem; margin: 10px 0 18px; min-height: 3em; }
.size-stage__price { font-family:"IBM Plex Mono",monospace; }
.size-stage__price .from { font-size:.66rem; letter-spacing:.16em; text-transform:uppercase; color: var(--muted-dk); display:block; }
.size-stage__price .n { font-size: 2.4rem; color: var(--yellow); font-weight:600; }
.size-stage__price .gst { font-size:.72rem; color: var(--muted-dk); }
.ton-note { display:inline-block; margin-top:10px; font-family:"IBM Plex Mono",monospace; font-size:.72rem; background: var(--steel-2); border:1px solid var(--line-dk); border-radius:99px; padding:5px 12px; color: var(--yellow-hi); }

.size-scale { display:flex; gap:8px; flex-wrap:wrap; }
.size-pill {
  flex: 1 1 60px; padding: 12px 6px; border-radius: 11px; background: var(--paper);
  border:1.5px solid var(--line); font-family:"Archivo",sans-serif; font-weight:800; font-size:1.05rem;
  transition:.16s var(--ease); display:flex; flex-direction:column; align-items:center; gap:2px;
}
.size-pill small { font-family:"IBM Plex Mono",monospace; font-weight:500; font-size:.66rem; color: var(--muted); }
.size-pill:hover { border-color: var(--muted); }
.size-pill[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.size-pill[aria-pressed="true"] small { color: var(--yellow-hi); }

/* form fields */
.field { margin-bottom: 20px; }
.field label { display:block; font-weight:600; font-size:.92rem; margin-bottom:7px; }
.field label .req { color: var(--yellow-lo); }
.field input, .field select, .field textarea {
  width:100%; padding: 14px 15px; border-radius: 11px; border:1.5px solid var(--line);
  background: var(--paper); font: inherit; color: var(--ink); transition: border .15s, box-shadow .15s;
}
.field input:focus, .field select:focus, .field textarea:focus { outline:none; border-color: var(--ink); box-shadow: 0 0 0 3px var(--yellow); }
.field textarea { resize: vertical; min-height: 92px; }
.field .hint { font-size:.82rem; color: var(--muted); margin-top:6px; }
.field.err input, .field.err select { border-color: #C0392B; }
.field .err-msg { color:#C0392B; font-size:.82rem; margin-top:6px; display:none; }
.field.err .err-msg { display:block; }
.grid-2 { display:grid; grid-template-columns: 1fr 1fr; gap:16px; }
.placement-grid { display:grid; grid-template-columns: 1fr 1fr; gap:12px; }
.radio-card { display:flex; gap:12px; align-items:flex-start; padding:14px 16px; border:1.5px solid var(--line); border-radius:12px; background:var(--paper); cursor:pointer; transition:.15s; }
.radio-card:hover { border-color: var(--muted); }
.radio-card input { margin-top:3px; accent-color: var(--ink); }
.radio-card strong { display:block; font-size:.95rem; }
.radio-card span { font-size:.84rem; color: var(--muted); }
.radio-card:has(input:checked) { border-color: var(--ink); box-shadow: 0 0 0 2px var(--yellow); }

/* nav buttons */
.step-nav { display:flex; justify-content:space-between; gap:14px; margin-top: 34px; }

/* summary panel */
.summary { position: sticky; top: 90px; background: var(--paper); border:1px solid var(--line); border-radius: 18px; overflow:hidden; box-shadow: var(--shadow); }
.summary__head { background: var(--ink); color: var(--paper); padding: 20px 22px; }
.summary__head .eyebrow { color: var(--yellow); }
.summary__head .big { font-family:"IBM Plex Mono",monospace; font-weight:600; font-size: 2.4rem; color: var(--yellow); line-height:1; margin-top: 6px; }
.summary__head .est { font-size:.78rem; color: var(--muted-dk); }
.summary__body { padding: 20px 22px; }
.summary__row { display:flex; justify-content:space-between; gap:12px; padding: 11px 0; border-bottom:1px dashed var(--line); font-size:.94rem; }
.summary__row:last-of-type { border-bottom:0; }
.summary__row .k { color: var(--muted); } .summary__row .v { font-weight:600; text-align:right; }
.summary__row .v.empty { color: var(--muted); font-weight:400; font-style:italic; }
.summary__note { background: var(--concrete); padding: 14px 16px; font-size:.82rem; color: var(--muted); border-radius:10px; margin-top:8px; }
.summary__note b { color: var(--steel); }

/* success */
.done-card { text-align:center; max-width: 560px; margin: 40px auto; }
.done-card .tick { width: 84px; height:84px; border-radius:50%; background: var(--green); color:#fff; display:flex; align-items:center; justify-content:center; margin: 0 auto 24px; }
.done-card h2 { font-size: 2.2rem; }
.done-card p { color: var(--muted); font-size: 1.1rem; margin: 14px 0 8px; }
.done-summary { text-align:left; background: var(--paper); border:1px solid var(--line); border-radius:14px; padding: 22px; margin: 26px 0; }

@media (max-width: 960px) {
  .app-body { grid-template-columns: 1fr; gap: 24px; }
  .summary { position: static; }
  .size-stage { grid-template-columns: 1fr; }
  .size-stage__viz { min-height: 180px; }
  .waste-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .grid-2, .placement-grid { grid-template-columns: 1fr; }
  .progress__label { font-size:0; } /* keep bars, drop labels on tiny screens */
}