:root{
    --frost:#EDF1F6;      /* page background */
    --paper:#FFFFFF;
    --ink:#132038;        /* text */
    --ink-soft:#4C5A74;
    --line:#CBD4E2;
    --heat:#F06A1E;       /* accent, from the thermal scale */
    --heat-deep:#C9500C;
    --cold:#1E3A8A;
    --ironbow:linear-gradient(90deg,#08052B 0%,#3B0F6E 22%,#9E1B5E 42%,#E24A1C 62%,#F9A11B 82%,#FFF5C4 100%);
    --radius:14px;
    --radius-sm:8px;
    --shadow:0 18px 40px -18px rgba(19,32,56,.35);
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  @media (prefers-reduced-motion:reduce){html{scroll-behavior:auto} *{transition:none!important;animation:none!important}}
  body{margin:0;font-family:"Instrument Sans",system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--frost);line-height:1.5;-webkit-font-smoothing:antialiased}
  a{color:inherit}
  h1,h2,h3{margin:0;line-height:1.1;letter-spacing:-.01em}
  h1{font-size:clamp(2.2rem,5.2vw,3.6rem);font-weight:700}
  h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:700}
  h3{font-size:1.15rem;font-weight:600}
  p{margin:0 0 1em;max-width:62ch}
  .muted{color:var(--ink-soft)}
  .wrap{width:min(1120px,100% - 2.5rem);margin-inline:auto}
  :focus-visible{outline:3px solid var(--heat);outline-offset:3px;border-radius:4px}

  /* header */
  header{position:sticky;top:0;z-index:20;background:rgba(237,241,246,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;gap:1rem;padding:.8rem 0}
  .brand{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.1rem;text-decoration:none;margin-right:auto}
  /* the colourful house */
  .brand .mark{width:36px;height:36px;flex:none;background:url(/img/logo-house.png) center/contain no-repeat}
  .nav a.link{text-decoration:none;font-weight:500;padding:.5rem .6rem;border-radius:var(--radius-sm)}
  .nav a.link:hover{background:#fff}

  /* buttons */
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.8rem 1.25rem;border-radius:999px;font:inherit;font-weight:600;font-size:1rem;text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:background .15s,transform .1s,border-color .15s}
  .btn-primary{background:var(--heat);color:#fff}
  .btn-primary:hover{background:var(--heat-deep)}
  .btn-primary:active{transform:translateY(1px)}
  .btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
  .btn-ghost:hover{background:#fff}
  .btn-lg{padding:1rem 1.6rem;font-size:1.05rem}
  .btn[disabled]{opacity:.45;cursor:not-allowed}

  /* views */
  .view{display:none}
  .view.active{display:block}

  /* choice screen */
  .choose{min-height:calc(100vh - 62px);display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:3rem 0 2.5rem}
  .choose h1{font-size:clamp(2.6rem,7vw,4.4rem)}
  .h1-sub{display:block;font-size:clamp(1.2rem,2.6vw,1.7rem);font-weight:500;color:var(--ink-soft);margin-top:.5rem;letter-spacing:0}
  .choose .sub{font-size:1.2rem;color:var(--ink-soft);margin:1rem auto 2.25rem;max-width:34rem}
  .choices{display:flex;flex-direction:column;gap:.75rem;width:min(420px,100%)}
  .choices .btn{width:100%}
  .choices .btn-ghost{background:#fff}

  /* hero */
  .hero{display:grid;grid-template-columns:1.05fr 1fr;gap:3rem;align-items:center}
  p.lead{font-size:1.1rem;color:var(--ink-soft);margin:1rem 0 0}
  .hero-actions{display:flex;gap:.75rem;flex-wrap:wrap}
  .hero-note{margin-top:1.25rem;font-size:.95rem;color:var(--ink-soft)}
  .figure{position:relative;margin:0}
  .figure .img{display:block;width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow);background:#08052B}
  .figure .placeholder{display:none;width:100%;aspect-ratio:1/1;border-radius:var(--radius);box-shadow:var(--shadow);background:
     radial-gradient(60% 45% at 30% 62%,#F9A11B 0%,#E24A1C 30%,#9E1B5E 60%,transparent 75%),
     radial-gradient(35% 30% at 70% 40%,#FFF5C4 0%,#F9A11B 35%,transparent 70%),
     linear-gradient(180deg,#08052B,#3B0F6E)}
  .figure.fallback .img{display:none}
  .figure.fallback .placeholder{display:block}
  .scale{position:absolute;left:1rem;right:1rem;bottom:-1.1rem;height:14px;border-radius:7px;/* the colours of the thermal photo above: cold blue, through green and yellow, to red */background:linear-gradient(90deg,#0B1F8C 0%,#1F4FE0 22%,#1FB5C9 40%,#3CC84A 55%,#F4E81C 75%,#F28A1A 88%,#D4231C 100%);box-shadow:0 6px 16px -6px rgba(0,0,0,.5)}
  .scale-labels{display:flex;justify-content:space-between;margin-top:1.6rem;font-size:.85rem;color:var(--ink-soft)}
  .credit{font-size:.78rem;color:var(--ink-soft);margin-top:.35rem;text-align:right}

  /* sections */
  section.block{padding:3.5rem 0}
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-top:2rem;counter-reset:step}
  .step{padding:1.5rem;background:var(--paper);border-radius:var(--radius);border:1px solid var(--line)}
  .step::before{counter-increment:step;content:counter(step);display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--ink);color:#fff;font-weight:700;margin-bottom:.9rem}
  .step p{margin:.4rem 0 0;color:var(--ink-soft)}

  .when{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:center;background:var(--ink);color:#fff;border-radius:var(--radius);padding:2.5rem}
  .when h2{color:#fff}
  .when p{color:#C9D3E5}
  .when .big{font-size:clamp(1.6rem,3.4vw,2.4rem);font-weight:700;line-height:1.15;color:#fff}
  .when .big span{display:block;color:#F9A11B}

  .volunteer-block{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}

  footer{padding:2.5rem 0;color:var(--ink-soft);font-size:.9rem;border-top:1px solid var(--line);margin-top:2rem}

  /* forms */
  .form-page{padding:3rem 0 4rem}
  .form-page .back{display:inline-block;margin-bottom:1.25rem;text-decoration:none;color:var(--ink-soft);font-weight:500}
  .card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:2rem;max-width:720px}
  .card h2{margin-bottom:.35rem}
  .card > p.intro{margin-bottom:1.75rem;color:var(--ink-soft)}
  fieldset{border:0;padding:0;margin:0 0 1.75rem}
  legend{font-weight:600;font-size:1.05rem;padding:0;margin-bottom:.6rem}
  label{display:block;font-weight:500;font-size:.95rem;margin-bottom:.35rem}
  .row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
  .field{margin-bottom:1rem}
  input[type=text],input[type=email],input[type=tel],textarea{width:100%;font:inherit;padding:.75rem .9rem;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:#fff;color:var(--ink)}
  input:focus,textarea:focus{border-color:var(--ink);outline:none}
  textarea{min-height:90px;resize:vertical}
  .hint{font-size:.85rem;color:var(--ink-soft);margin:.35rem 0 0}
  .error{font-size:.9rem;color:#B3261E;margin:.4rem 0 0;display:none}
  .error.show{display:block}

  /* address lookup */
  .lookup{position:relative}
  .suggest{position:absolute;left:0;right:0;top:calc(100% + 4px);background:#fff;border:1.5px solid var(--line);border-radius:var(--radius-sm);box-shadow:var(--shadow);list-style:none;margin:0;padding:.3rem;z-index:10;display:none;max-height:260px;overflow:auto}
  .suggest.open{display:block}
  .suggest li{padding:.6rem .7rem;border-radius:6px;cursor:pointer;font-size:.95rem}
  .suggest li:hover,.suggest li[aria-selected=true]{background:var(--frost)}
  .suggest li small{display:block;color:var(--ink-soft)}
  .suggest li.note{color:var(--ink-soft);cursor:default;font-size:.9rem}
  .chosen{display:none;margin-top:.75rem;padding:.9rem 1rem;border-radius:var(--radius-sm);background:var(--frost);border:1px solid var(--line)}
  .chosen.show{display:flex;justify-content:space-between;gap:1rem;align-items:flex-start}
  .chosen button{background:none;border:0;font:inherit;color:var(--heat-deep);font-weight:600;cursor:pointer;padding:0;white-space:nowrap}
  .spin{position:absolute;right:.9rem;top:50%;width:16px;height:16px;margin-top:-8px;border:2px solid var(--line);border-top-color:var(--heat);border-radius:50%;display:none;animation:spin .8s linear infinite}
  .spin.on{display:block}
  @keyframes spin{to{transform:rotate(360deg)}}

  /* calendar */
  .cal{max-width:420px}
  .cal-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:.6rem}
  .cal-head strong{font-size:1.05rem}
  .cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:4px}
  .cal-grid .dow{text-align:center;font-size:.78rem;color:var(--ink-soft);padding:.3rem 0}
  .cal-grid button{aspect-ratio:1;border:1.5px solid transparent;border-radius:var(--radius-sm);background:transparent;font:inherit;font-size:.95rem;color:var(--line);cursor:default}
  .cal-grid button.open{color:var(--ink);background:#fff;border-color:var(--line);cursor:pointer;font-weight:600}
  .cal-grid button.open:hover{border-color:var(--ink)}
  .cal-grid button.selected{background:var(--ink);color:#fff;border-color:var(--ink)}
  .cal-grid button.pad{visibility:hidden}
  .slots{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.4rem}
  .slot{padding:.55rem .9rem;border-radius:999px;border:1.5px solid var(--line);background:#fff;font:inherit;font-weight:500;cursor:pointer}
  .slot:hover{border-color:var(--ink)}
  .slot.selected{background:var(--heat);border-color:var(--heat);color:#fff}
  .picked{margin-top:.9rem;font-weight:600}

  /* evening picker (volunteers) */
  .evenings{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem}
  .evening{display:flex;flex-direction:column;align-items:center;padding:.7rem .4rem;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:#fff;cursor:pointer;font:inherit}
  .evening span{font-size:.8rem;color:var(--ink-soft)}
  .evening strong{font-size:1.1rem}
  .evening:hover{border-color:var(--ink)}
  .evening.selected{background:var(--ink);border-color:var(--ink);color:#fff}
  .evening.selected span{color:#C9D3E5}
  .choice{display:flex;gap:.5rem;flex-wrap:wrap}
  .choice .slot{}

  /* what you'll need to do */
  .needs{background:var(--frost);border-left:4px solid var(--heat);border-radius:var(--radius-sm);padding:1rem 1.2rem;margin-bottom:1.75rem}
  .needs h3{font-size:1rem;margin-bottom:.4rem}
  .needs ul{margin:0;padding-left:1.1rem;color:var(--ink-soft);font-size:.95rem}
  .needs li{margin:.25rem 0}

  .when-note{background:var(--frost);border-radius:var(--radius-sm);padding:1rem 1.2rem;margin-bottom:1.75rem}
  .when-note p{margin:0 0 .5rem;font-size:.95rem;color:var(--ink-soft)}
  .when-note p:last-child{margin:0}
  .when-note strong{color:var(--ink)}

  .how-list{margin:1.25rem 0 0;padding-left:1.3rem;max-width:62ch;font-size:1.1rem;color:var(--ink-soft)}
  .how-list li{margin:.5rem 0}
  .why-photo{max-width:440px;margin-top:2rem}
  .why-lead{margin:1.25rem 0 0;max-width:62ch;font-size:1.1rem;color:var(--ink-soft)}
  .why-lead + .how-list{margin-top:.5rem}

  /* info tooltip */
  legend{position:relative}
  .info{display:inline-block;vertical-align:middle;margin-left:.4rem;position:relative;cursor:help}
  .info-i{display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:var(--ink);color:#fff;font-size:.8rem;font-weight:700;font-style:normal}
  .tip{position:absolute;left:50%;bottom:calc(100% + 10px);transform:translateX(-50%);width:min(320px,80vw);background:var(--ink);color:#fff;font-weight:400;font-size:.88rem;line-height:1.45;padding:.8rem .9rem;border-radius:var(--radius-sm);box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:opacity .15s;z-index:15;pointer-events:none}
  .tip::after{content:"";position:absolute;top:100%;left:50%;margin-left:-6px;border:6px solid transparent;border-top-color:var(--ink)}
  .info:hover .tip,.info:focus .tip,.info:focus-within .tip{opacity:1;visibility:visible}
  /* On phones there's no room above (the sticky header) or beside the icon,
     so the tip drops down below the heading, as wide as the form */
  @media (max-width:820px){
    legend{width:100%}
    .info{position:static}
    .tip{top:calc(100% + 8px);bottom:auto;left:0;right:0;width:auto;transform:none}
    .tip::after{display:none}
  }

  /* success */
  .done{text-align:center;padding:2rem 1rem}
  .done .tick{width:64px;height:64px;border-radius:50%;background:var(--ironbow);display:grid;place-items:center;margin:0 auto 1.25rem;color:#fff;font-size:2rem;font-weight:700}
  .done p{margin-inline:auto}

  @media (max-width:820px){
    .hero{grid-template-columns:1fr;padding:2.5rem 0 2.5rem;gap:2.25rem}
    .steps{grid-template-columns:1fr}
    .when,.volunteer-block{grid-template-columns:1fr;gap:1.25rem}
    .when{padding:1.75rem}
    .row{grid-template-columns:1fr}
    .card{padding:1.4rem}
    .nav .link{display:none}
    .evenings{grid-template-columns:repeat(4,1fr)}
  }