:root{
    --wall:#FAFAF7;
    --ink:#2A343D;
    --ink-soft:#5C6873;
    --tape:#3C4853;
    --tape-deep:#242E37;
    --gold:#FFC200;
    --gold-soft:#FFF6D6;
    --gold-line:#F0DFA0;
    --line:#E4E4E0;
    --card:#FFFFFF;
    --chip:#5E86B0;
    --ok:#2E7D4F;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{
    font-family:"Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
    background:var(--wall);
    color:var(--ink);
    line-height:1.6;
  }
  a{color:var(--tape)}
  .wrap{max-width:1060px;margin:0 auto;padding:0 20px}

  /* ---------- header ---------- */
  header{
    background:var(--card);
    border-bottom:1px solid var(--line);
  }
  .topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 0}
  .logo{display:flex;align-items:center;text-decoration:none}
  .logo-img{height:56px;width:auto;display:block}
  @media(max-width:520px){.logo-img{height:44px}}
  nav{display:flex;gap:4px;flex-wrap:wrap}
  nav a{
    text-decoration:none;color:var(--ink-soft);font-size:.88rem;padding:7px 12px;border-radius:8px;
  }
  nav a:hover{background:var(--wall);color:var(--ink)}
  nav a.active{background:var(--gold-soft);color:var(--tape-deep);font-weight:600;box-shadow:inset 0 -2px 0 var(--gold)}

  .crumb{font-size:.8rem;color:var(--ink-soft);padding:16px 0 0}
  .crumb a{color:var(--ink-soft);text-decoration:none}
  .crumb a:hover{text-decoration:underline}

  /* ---------- hero ---------- */
  .hero{padding:14px 0 8px}
  h1{font-size:clamp(1.7rem,4vw,2.4rem);letter-spacing:-.02em;line-height:1.15}
  .hero p{color:var(--ink-soft);max-width:640px;margin-top:8px;font-size:1.02rem}
  .updated{
    display:inline-flex;align-items:center;gap:6px;margin-top:12px;
    font-size:.78rem;color:var(--ink-soft);background:var(--card);
    border:1px solid var(--line);border-radius:999px;padding:4px 12px;
  }
  .updated::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--ok)}

  /* ---------- layout ---------- */
  .grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;padding:26px 0 10px}
  @media(max-width:880px){.grid{grid-template-columns:1fr}}

  /* ---------- calculator ---------- */
  .calc{
    background:var(--card);border:1px solid var(--line);border-radius:14px;
    padding:26px;box-shadow:0 1px 2px rgba(34,48,60,.04);
  }
  .calc h2{font-size:1.05rem;margin-bottom:4px}
  .calc .hint{font-size:.85rem;color:var(--ink-soft);margin-bottom:18px}
  fieldset{border:0;margin-bottom:18px}
  legend{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft);margin-bottom:10px}
  .row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
  .row.two{grid-template-columns:repeat(2,1fr)}
  @media(max-width:520px){.row,.row.two{grid-template-columns:1fr 1fr}}
  label.field{display:block;font-size:.83rem;color:var(--ink);font-weight:600}
  label.field span{display:block;margin-bottom:5px}
  input[type=number]{
    width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;
    font-size:1rem;font-family:inherit;color:var(--ink);background:var(--wall);
  }
  input[type=number]:focus{outline:2px solid var(--tape);outline-offset:1px;background:#fff}
  .unit{font-weight:400;color:var(--ink-soft);font-size:.75rem}

  .toggles{display:flex;gap:18px;flex-wrap:wrap}
  .check{display:flex;align-items:center;gap:8px;font-size:.9rem;cursor:pointer}
  .check input{width:17px;height:17px;accent-color:var(--tape);cursor:pointer}

  .coats{display:flex;gap:8px}
  .coats button{
    flex:1;padding:9px 0;border:1px solid var(--line);background:var(--wall);
    border-radius:9px;font-size:.92rem;font-family:inherit;cursor:pointer;color:var(--ink);
  }
  .coats button.sel{background:var(--tape);border-color:var(--tape);color:#fff;font-weight:600;box-shadow:inset 0 -3px 0 var(--gold)}
  .coats button:focus-visible{outline:2px solid var(--tape-deep);outline-offset:1px}

  details.adv{margin-top:4px}
  details.adv summary{
    cursor:pointer;font-size:.85rem;color:var(--tape-deep);font-weight:600;
    list-style:none;display:inline-flex;align-items:center;gap:6px;
  }
  details.adv summary::after{content:"▾";font-size:.7rem;transition:transform .15s}
  details.adv[open] summary::after{transform:rotate(180deg)}
  details.adv .row{margin-top:12px}

  /* ---------- result chip ---------- */
  .result{position:sticky;top:20px}
  .chipcard{
    background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;
    box-shadow:0 6px 18px rgba(34,48,60,.08);
  }
  .chip-swatch{
    height:120px;background:var(--chip);position:relative;transition:background .35s;
  }
  .chip-swatch .code{
    position:absolute;bottom:10px;left:16px;color:rgba(255,255,255,.92);
    font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;font-weight:600;
  }
  .chip-body{padding:20px 20px 22px}
  .gallons{font-size:2.6rem;font-weight:800;letter-spacing:-.03em;line-height:1}
  .gallons small{font-size:1rem;font-weight:600;color:var(--ink-soft);letter-spacing:0}
  .buy{margin-top:6px;font-size:.92rem;color:var(--ok);font-weight:600}
  .breakdown{margin-top:16px;border-top:1px dashed var(--line);padding-top:14px;font-size:.86rem}
  .breakdown div{display:flex;justify-content:space-between;padding:3px 0;color:var(--ink-soft)}
  .breakdown div b{color:var(--ink);font-weight:600}
  .swatchbar{display:flex;gap:8px;padding:0 20px 20px}
  .swatchbar button{
    width:26px;height:26px;border-radius:6px;border:2px solid transparent;cursor:pointer;
  }
  .swatchbar button.sel{border-color:var(--ink)}
  .swatchbar button:focus-visible{outline:2px solid var(--tape-deep);outline-offset:1px}
  .swatch-note{padding:0 20px 16px;font-size:.72rem;color:var(--ink-soft)}

  /* ---------- content ---------- */
  .content{max-width:720px;padding:8px 0 30px}
  .content h2{font-size:1.35rem;margin:34px 0 10px;letter-spacing:-.01em}
  .content h3{font-size:1.05rem;margin:22px 0 8px}
  .content p{margin-bottom:12px;color:#39434C}
  .method{
    background:var(--gold-soft);border:1px solid var(--gold-line);border-radius:12px;padding:18px 20px;
    font-size:.9rem;margin-top:26px;
  }
  .method b{color:var(--tape-deep)}
  .method p{margin-bottom:8px;color:#39434C}
  .method p:last-child{margin-bottom:0}
  table{width:100%;border-collapse:collapse;font-size:.9rem;margin:12px 0}
  th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line)}
  th{font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft)}

  details.faq{border-bottom:1px solid var(--line);padding:13px 0}
  details.faq summary{cursor:pointer;font-weight:600;font-size:.95rem;list-style:none;display:flex;justify-content:space-between;align-items:center}
  details.faq summary::after{content:"+";font-size:1.2rem;color:var(--ink-soft)}
  details.faq[open] summary::after{content:"–"}
  details.faq p{margin-top:8px;font-size:.9rem;color:#39434C}

  /* ---------- footer ---------- */
  footer{border-top:1px solid var(--line);background:var(--card);margin-top:20px}
  .foot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding:26px 0;font-size:.85rem;color:var(--ink-soft)}
  .foot a{color:var(--ink-soft);text-decoration:none;margin-right:16px}
  .foot a:hover{color:var(--ink);text-decoration:underline}

  @media (prefers-reduced-motion: reduce){
    *{transition:none!important;animation:none!important}
    html{scroll-behavior:auto}
  }

/* ---- static pages ---- */

.page{max-width:720px;padding:10px 0 50px}
.page h1{margin:24px 0 6px}
.page .lede{color:var(--ink-soft);font-size:1.05rem;margin-bottom:22px}
.page h2{font-size:1.3rem;margin:30px 0 10px;letter-spacing:-.01em}
.page p{margin-bottom:12px;color:#39434C}
.page ul{margin:0 0 12px 22px;color:#39434C}
.page li{margin-bottom:6px}
.notice{background:var(--gold-soft);border:1px solid var(--gold-line);border-radius:12px;padding:16px 18px;font-size:.9rem;margin:20px 0}
.photo-ph{width:110px;height:110px;border-radius:50%;background:repeating-linear-gradient(45deg,#F1F1EE,#F1F1EE 8px,#E8E8E4 8px,#E8E8E4 16px);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:#9AA5AF;font-size:.7rem;text-align:center;float:right;margin:0 0 12px 18px}
.contact-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;margin:20px 0}
.contact-card .mail{font-size:1.2rem;font-weight:700;color:var(--tape-deep)}
.eff{font-size:.8rem;color:var(--ink-soft);margin-bottom:20px}

/* ---- homepage ---- */

.hero-home{padding:44px 0 10px;max-width:760px}
.hero-home h1{font-size:clamp(2rem,5vw,2.9rem);letter-spacing:-.025em;line-height:1.1}
.hero-home h1 em{font-style:normal;box-shadow:inset 0 -0.34em 0 var(--gold);padding:0 2px}
.hero-home p{color:var(--ink-soft);font-size:1.08rem;margin-top:14px;max-width:600px}
.trust{display:flex;gap:22px;flex-wrap:wrap;margin-top:20px;font-size:.85rem;color:var(--ink-soft)}
.trust span{display:flex;align-items:center;gap:7px}
.trust span::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--gold)}

.finder{margin:30px 0 6px;max-width:560px;position:relative}
.finder input{
  width:100%;padding:15px 18px 15px 46px;border:1.5px solid var(--line);border-radius:12px;
  font-size:1.02rem;font-family:inherit;background:var(--card);color:var(--ink);
  box-shadow:0 2px 8px rgba(34,48,60,.05);
}
.finder input:focus{outline:2px solid var(--tape);outline-offset:1px}
.finder svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);width:18px;height:18px;stroke:var(--ink-soft)}
.finder .none{display:none;font-size:.9rem;color:var(--ink-soft);margin-top:10px}

.cat{padding:26px 0 4px}
.cat h2{font-size:1.05rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft);display:flex;align-items:center;gap:12px}
.cat h2::after{content:"";flex:1;height:1px;background:var(--line)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin-top:16px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:13px;padding:18px;
  text-decoration:none;color:var(--ink);display:block;position:relative;
  transition:transform .12s, box-shadow .12s, border-color .12s;
}
.card:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(34,48,60,.09);border-color:#CFCFC9}
.card:focus-visible{outline:2px solid var(--tape);outline-offset:2px}
.card h3{font-size:1.02rem;letter-spacing:-.01em;margin-bottom:5px}
.card p{font-size:.85rem;color:var(--ink-soft);line-height:1.45}
.badge{position:absolute;top:14px;right:14px;font-size:.66rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:3px 8px;border-radius:999px}
.badge.live{background:var(--gold);color:var(--tape-deep)}
.badge.soon{background:#EFEFEC;color:var(--ink-soft)}
.card.soon{opacity:.75}
.card.soon:hover{transform:none;box-shadow:none;border-color:var(--line)}

.why{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:26px;margin:40px 0 10px;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:720px){.why{grid-template-columns:1fr}}
.why h3{font-size:.98rem;margin-bottom:6px}
.why p{font-size:.87rem;color:var(--ink-soft)}
.why a{color:var(--tape-deep);font-weight:600}
.home-foot-note{padding:26px 0 44px;max-width:640px}
.home-foot-note p{font-size:.9rem;color:var(--ink-soft)}

/* generic result card band (non-paint tools) */
.chip-band{height:16px;background:linear-gradient(90deg,var(--gold),#FFD34D)}
.rescard-label{font-size:.78rem;text-transform:uppercase;letter-spacing:.07em;color:var(--ink-soft);margin-bottom:6px}

/* ---- mobile hamburger menu ---- */
.menu-btn{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:10px;background:none;border:1px solid var(--line);border-radius:10px;cursor:pointer}
.menu-btn span{display:block;height:2.5px;border-radius:2px;background:var(--ink);transition:transform .2s,opacity .2s}
.menu-btn.x span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.menu-btn.x span:nth-child(2){opacity:0}
.menu-btn.x span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
.menu-btn:focus-visible{outline:2px solid var(--tape);outline-offset:2px}
@media(max-width:768px){
  .topbar{position:relative}
  header{position:relative;z-index:50}
  .menu-btn{display:flex}
  nav{display:none}
  nav.open{
    display:flex;flex-direction:column;gap:2px;
    position:absolute;top:100%;left:0;right:0;
    background:var(--card);border-bottom:1px solid var(--line);
    padding:10px 20px 16px;box-shadow:0 12px 24px rgba(34,48,60,.10);
  }
  nav.open a{padding:13px 12px;font-size:1rem;border-radius:10px}
  nav.open a.active{box-shadow:inset 3px 0 0 var(--gold);background:var(--gold-soft)}
}
@media (prefers-reduced-motion: reduce){.menu-btn span{transition:none}}

/* ---- full-width hero band ---- */
.hero-band{
  background:var(--card);
  border-bottom:1px solid var(--line);
  background-image:radial-gradient(ellipse 900px 380px at 50% -80px, var(--gold-soft), transparent 70%);
}
.hero-band .hero-home{
  max-width:none;
  padding:58px 0 46px;
  text-align:center;
}
.hero-band .hero-home p{margin-left:auto;margin-right:auto;max-width:620px}
.hero-band .trust{justify-content:center}
.hero-band .finder{margin:32px auto 0;max-width:560px}
@media(max-width:600px){.hero-band .hero-home{padding:38px 0 32px}}

/* ---- guides / articles ---- */
.eyebrow{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--tape-deep);background:var(--gold-soft);border:1px solid var(--gold-line);border-radius:999px;padding:3px 10px;margin:18px 0 10px}
.article h1{font-size:clamp(1.7rem,4vw,2.3rem);letter-spacing:-.02em;line-height:1.18;margin-bottom:8px}
.byline{font-size:.85rem;color:var(--ink-soft);margin-bottom:22px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.article .lede{font-size:1.1rem;color:#39434C;margin-bottom:18px}
.article-cta{background:var(--gold-soft);border:1px solid var(--gold-line);border-radius:12px;padding:16px 20px;margin-top:26px;font-size:.95rem}
.guide-grid{margin-top:6px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.guide-card .eyebrow{margin:0 0 10px}
.guide-card h3{font-size:1.12rem;line-height:1.3}
.guide-meta{display:block;margin-top:12px;font-size:.78rem;color:var(--ink-soft)}