/* Gutter Guard Installation in Nashville — one-page homeowner guide.
   Composition: cool steel palette on a light ground; an indexed "run" spine
   where every H2 stage is its own bounded panel with a numbered marker column;
   the work stage inverts to deep ink and carries a connected numbered sequence;
   the two buying paths render as two equal provider panels; the completion
   stage renders as a scannable checked grid. */

:root{
  --page:#E8ECEF;
  --surface:#FFFFFF;
  --tint:#EDF3F7;
  --tint-2:#F2F6F9;
  --deep:#0E1A22;
  --deep-2:#152833;
  --ink:#0F1519;
  --ink-2:#46535E;
  --ink-3:#65727D;
  --line:#D3DBE1;
  --line-2:#E4EAEE;
  --steel:#1A5A7E;
  --steel-deep:#134761;
  --on-deep:#E7EEF2;
  --on-deep-2:#A6BAC6;
  --focus-light:#9CCBE6;

  --shell:1080px;
  --gut:clamp(16px,4vw,32px);
  --sp:clamp(20px,4.2vw,38px);
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}

body{
  margin:0;
  background:var(--page);
  color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:17px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
}

@media (min-width:900px){ body{font-size:18px} }

p{margin:0 0 1em;overflow-wrap:break-word}
p:last-child{margin-bottom:0}
strong{font-weight:700}

a{color:var(--steel-deep)}
a:hover{color:var(--steel)}

:focus-visible{outline:3px solid var(--steel);outline-offset:2px;border-radius:3px}
.topbar :focus-visible,.stage--install :focus-visible,.foot :focus-visible{outline-color:var(--focus-light)}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gut)}

.sr-only{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}

.skip{position:absolute;left:-9999px;top:auto}
.skip:focus{
  position:fixed;left:12px;top:12px;z-index:100;
  background:var(--surface);color:var(--ink);
  padding:12px 16px;border-radius:8px;text-decoration:none;font-weight:600;
  box-shadow:0 6px 20px rgba(8,20,28,.30);
}

/* ---------- Masthead and navigation ---------- */

.topbar{background:var(--deep);color:var(--on-deep);position:relative;z-index:30}

.topbar__in{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:58px}

.brand{
  min-width:0;
  font-size:clamp(11.5px,3.1vw,13.5px);
  font-weight:700;letter-spacing:.11em;text-transform:uppercase;
  color:var(--on-deep);overflow-wrap:anywhere;
}

.nav{flex:none}

.burger{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;margin-right:-9px;
  border-radius:8px;color:var(--on-deep);text-decoration:none;
}
.burger__bars,.burger__bars::before,.burger__bars::after{
  display:block;width:22px;height:2px;background:currentColor;border-radius:2px;
}
.burger__bars{position:relative}
.burger__bars::before{content:"";position:absolute;top:-7px;left:0}
.burger__bars::after{content:"";position:absolute;top:7px;left:0}

.nav__panel{
  display:none;
  position:absolute;left:0;right:0;top:100%;
  background:var(--deep-2);
  border-top:1px solid rgba(255,255,255,.14);
  box-shadow:0 16px 32px rgba(6,16,22,.30);
}
.nav__panel:target{display:block}
#menu:target ~ .burger{display:none}

.nav__list{list-style:none;margin:0;padding:4px var(--gut) 14px}
.nav__list a{
  display:flex;align-items:center;min-height:44px;
  padding:8px 2px;color:var(--on-deep);text-decoration:none;font-weight:600;
  border-bottom:1px solid rgba(255,255,255,.10);
}
.nav__list li:last-child a{border-bottom:0}
.nav__close{color:var(--on-deep-2)}

@media (min-width:860px){
  .burger{display:none}
  .nav__panel{display:block;position:static;background:none;border-top:0;box-shadow:none}
  .nav__list{display:flex;gap:4px;padding:0}
  .nav__list a{
    min-height:0;padding:9px 12px;border-bottom:0;border-radius:6px;
    font-size:.84rem;letter-spacing:.015em;
  }
  .nav__list a:hover{background:rgba(255,255,255,.09);color:#fff}
  .nav__closeitem{display:none}
}

/* ---------- Opening answer ---------- */

.open{padding:clamp(30px,6vw,58px) 0 clamp(20px,4vw,32px)}

h1{
  margin:0 0 clamp(18px,3vw,26px);
  font-size:clamp(1.72rem,6.1vw,3rem);
  line-height:1.07;letter-spacing:-.022em;font-weight:800;
  max-width:19ch;
}

.answer{
  background:var(--surface);
  border:1px solid var(--line);
  border-left:4px solid var(--steel);
  border-radius:14px;
  padding:clamp(18px,4vw,30px);
  margin:0 0 clamp(16px,3vw,22px);
  font-size:clamp(1.05rem,2.5vw,1.26rem);
  line-height:1.52;
  box-shadow:0 1px 2px rgba(16,32,44,.05);
}

.open__note{color:var(--ink-2);max-width:70ch}

/* ---------- Stage panels (one per H2) ---------- */

.stages{display:grid;gap:22px;padding-bottom:clamp(26px,5vw,44px)}

.stage{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:16px;
  padding:var(--sp);
  box-shadow:0 1px 2px rgba(16,32,44,.05);
}

.stage__mark{
  display:flex;align-items:baseline;gap:10px;
  padding-bottom:12px;border-bottom:1px solid var(--line-2);
}
.stage__num{
  font-size:1.05rem;font-weight:800;color:var(--steel);
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.stage__tag{
  font-size:.73rem;font-weight:700;letter-spacing:.13em;
  text-transform:uppercase;color:var(--ink-3);
}

.stage__body{min-width:0}
.stage__body h2{
  margin:0 0 12px;
  font-size:clamp(1.26rem,3.5vw,1.62rem);
  line-height:1.24;letter-spacing:-.012em;font-weight:750;
}
.stage__body p{max-width:72ch}
.stage__answer{font-size:1.05em;color:var(--ink)}

/* Stage 02 — the work stage inverts */

.stage--install{background:var(--deep);border-color:var(--deep);color:var(--on-deep)}
.stage--install .stage__mark{border-bottom-color:rgba(255,255,255,.16)}
.stage--install .stage__num{color:#8FC3DE}
.stage--install .stage__tag{color:var(--on-deep-2)}
.stage--install h2{color:#FFFFFF}
.stage--install p{color:var(--on-deep)}

/* Stage 03 — two equal provider paths */

.stage--paths{background:var(--tint);border-color:#D6E2EA}

/* Stage 03 — local property patterns */

.stage--local{background:#F5F1E8;border-color:#DDD4C4}
.stage--local .stage__num{color:#8A5A2B}
.local-grid{
  list-style:none;margin:clamp(20px,3.4vw,28px) 0 0;padding:0;
  display:grid;grid-template-columns:minmax(0,1fr);gap:12px;
}
.local-grid__item{
  min-width:0;padding:16px 18px;
  background:rgba(255,255,255,.72);border:1px solid #DDD4C4;border-radius:11px;
}
.local-grid__item strong{display:block;margin-bottom:5px;color:var(--ink)}
.local-grid__item span{display:block;color:var(--ink-2)}
.local-grid__item--canopy{border-left:4px solid #8A5A2B}
@media (min-width:760px){
  .local-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- Numbered installation run ---------- */

.run{
  list-style:none;counter-reset:step;
  margin:clamp(20px,3.4vw,28px) 0;padding:0;
}
.run__step{
  counter-increment:step;
  position:relative;
  min-width:0;
  padding:0 0 20px 54px;
  color:var(--on-deep);
}
.run__step:last-child{padding-bottom:0}
.run__step strong{color:#FFFFFF;font-weight:700}
.run__step::before{
  content:counter(step);
  position:absolute;left:0;top:-1px;
  width:34px;height:34px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--on-deep);color:var(--deep);
  font-weight:800;font-size:.98rem;font-variant-numeric:tabular-nums;
}
.run__step::after{
  content:"";position:absolute;left:16px;top:38px;bottom:2px;width:2px;
  background:rgba(255,255,255,.22);
}
.run__step:last-child::after{display:none}

/* ---------- Company comparison (semantic table, two equal panels) ---------- */

.cmp{display:block;width:100%;border-collapse:collapse;margin:clamp(20px,3.4vw,28px) 0}
.cmp__body{display:grid;gap:16px;grid-template-columns:minmax(0,1fr)}

.cmp__co{
  display:block;min-width:0;
  background:var(--surface);
  border:1px solid #CFDDE6;
  border-radius:13px;
  overflow:hidden;
}

.cmp__name{
  display:block;text-align:left;min-width:0;
  margin:0;padding:12px 18px;
  background:#E3EDF3;
  border-bottom:1px solid #CFDDE6;
  font-size:1.02rem;font-weight:750;
}
.cmp__name a{
  display:inline-block;padding:6px 0;
  color:var(--steel-deep);text-decoration:underline;
  text-underline-offset:3px;overflow-wrap:break-word;
}

.cmp__cell{display:block;min-width:0;padding:14px 18px}
.cmp__cell + .cmp__cell{border-top:1px solid var(--line-2)}

.cmp__label{
  display:block;margin-bottom:4px;
  font-size:.71rem;font-weight:700;letter-spacing:.09em;
  text-transform:uppercase;color:var(--ink-3);
}
.cmp__val{display:block;color:var(--ink);overflow-wrap:break-word}

@media (min-width:880px){
  .cmp__body{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- Completion checklist ---------- */

.checklist{
  list-style:none;margin:clamp(20px,3.4vw,28px) 0 0;padding:0;
  display:grid;gap:12px;grid-template-columns:minmax(0,1fr);
}
.checklist__item{
  position:relative;min-width:0;
  background:var(--tint-2);
  border:1px solid var(--line-2);
  border-radius:11px;
  padding:15px 17px 15px 48px;
}
.checklist__item strong{display:block;margin-bottom:2px}
.checklist__item::before{
  content:"";position:absolute;left:16px;top:18px;
  width:18px;height:18px;border:2px solid var(--steel);border-radius:5px;
}
.checklist__item::after{
  content:"";position:absolute;left:20px;top:22px;
  width:10px;height:5px;
  border-left:2px solid var(--steel);border-bottom:2px solid var(--steel);
  transform:rotate(-45deg);
}

@media (min-width:880px){
  .checklist{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
}

/* ---------- Desktop spine ---------- */

@media (min-width:1040px){
  .stage{grid-template-columns:132px minmax(0,1fr);column-gap:34px;gap:0}
  .stage__mark{
    display:block;text-align:right;
    padding:2px 24px 0 0;
    border-bottom:0;border-right:1px solid var(--line-2);
  }
  .stage--install .stage__mark{border-right-color:rgba(255,255,255,.16)}
  .stage__num{display:block;font-size:2.5rem;line-height:1;margin-bottom:9px}
  .stage__tag{display:block;font-size:.7rem;line-height:1.4}

  .stage + .stage::before{
    content:"";position:absolute;width:1px;
    left:calc(var(--sp) + 132px);
    top:-22px;height:22px;
    background:var(--line);
  }
}

/* ---------- Footer ---------- */

.foot{
  background:var(--deep);color:var(--on-deep-2);
  margin-top:clamp(26px,5vw,46px);
  padding:26px 0 34px;font-size:.92rem;
}
.foot p{max-width:70ch}

/* ---------- Motion ---------- */

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}

/* ---------- 404 ---------- */

.nf{padding:clamp(40px,10vw,90px) 0 clamp(40px,8vw,80px)}
.nf h1{margin-bottom:16px}
.nf p{max-width:60ch;color:var(--ink-2)}
.nf a{font-weight:600}