/* Gutter guards for metal roofs in Nashville — one-page guide.
   Purpose-built stylesheet. Mobile first. No external dependency. */

:root {
  --ink:        #171a1d;
  --graphite:   #22282d;
  --graphite-2: #2b3238;
  --body:       #33393e;
  --muted:      #62696f;
  --paper:      #ffffff;
  --field:      #f8f7f5;
  --steel-bg:   #e9edf0;
  --sand:       #efe9e1;
  --line:       #d8d3cc;
  --line-2:     #e6e2dc;
  --copper:     #8a4520;
  --copper-lt:  #d69a6a;
  --steel:      #35586d;
  --moss:       #4b5f34;
  --on-dark:    #e9eef1;
  --on-dark-2:  #b7c0c6;
  --focus:      #8a4520;
  --focus-dark: #f0c39a;

  --rail: 45rem;
  --edge: clamp(1.15rem, 5vw, 2rem);
  --band: clamp(2.8rem, 7vw, 4.6rem);
  --ui: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--body);
  font-family: var(--ui);
  font-size: 1.0625rem;
  line-height: 1.62;
  -webkit-text-size-adjust: 100%;
}

@media (min-width: 46em) { body { font-size: 1.125rem; } }

h1, h2, h3 { color: var(--ink); line-height: 1.18; margin: 0; font-weight: 700; letter-spacing: -0.014em; }
h1 { font-size: clamp(1.8rem, 5vw, 2.5rem); letter-spacing: -0.022em; }
h2 { font-size: clamp(1.35rem, 3.6vw, 1.85rem); }
h3 { font-size: clamp(1.1rem, 2.6vw, 1.25rem); }

p { margin: 0 0 1.05rem; }
p:last-child { margin-bottom: 0; }

a { color: var(--copper); text-underline-offset: 2px; }
a:hover { color: var(--ink); }

strong { color: var(--ink); }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 2px;
}

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

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 20;
  background: var(--paper);
  color: var(--copper);
  padding: 0.85rem 1.2rem;
  font-weight: 700;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

/* ---------- centered rail: every section shares one alignment ---------- */

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

/* ---------- opening ---------- */

.open {
  background: var(--graphite);
  color: var(--on-dark-2);
  padding-block: clamp(2.4rem, 6vw, 3.8rem) clamp(2.2rem, 5vw, 3.2rem);
  border-bottom: 4px solid var(--copper);
}

.eyebrow {
  margin: 0 0 0.9rem;
  font-size: 0.8rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--copper-lt);
}

.open h1 { color: #fff; }

.answer {
  margin-top: 1.4rem;
  padding-top: 1.3rem;
  border-top: 3px solid var(--copper);
  color: var(--on-dark);
  font-size: clamp(1.05rem, 2.4vw, 1.24rem);
  line-height: 1.55;
}

.open__sub { margin-top: 1.1rem; color: var(--on-dark-2); }

.xsec { margin: clamp(1.6rem, 4vw, 2.4rem) 0 0; }
.xsec svg {
  display: block;
  width: 100%;
  height: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding-top: clamp(0.8rem, 2vw, 1.4rem);
}

/* ---------- section shells: one band per H2 ---------- */

.sec { padding-block: var(--band); }
.sec > .rail > h2 { position: relative; padding-top: 1.1rem; }
.sec > .rail > h2::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 3.4rem;
  height: 4px;
  border-radius: 2px;
  background: var(--copper);
}
.sec > .rail > .a { margin-top: 1rem; }

.a {
  color: var(--ink);
  font-size: 1.06em;
  line-height: 1.55;
}

.sec--attach { background: var(--paper); }
.sec--firms  { background: var(--steel-bg); }
.sec--firms > .rail > h2::before { background: var(--steel); }
.sec--flow   { background: var(--graphite); color: var(--on-dark-2); }
.sec--flow h2 { color: #fff; }
.sec--flow .a { color: var(--on-dark); }
.sec--flow > .rail > h2::before { background: var(--copper-lt); }
.sec--flow a { color: var(--copper-lt); }
.sec--snow   { background: var(--sand); }
.sec--snow > .rail > h2::before { background: var(--moss); }
.sec--quote  { background: var(--paper); border-top: 1px solid var(--line-2); }
.sec--quote > .rail > h2::before { background: var(--steel); }

.sec--flow :focus-visible { outline-color: var(--focus-dark); }

/* ---------- roof-type selector ---------- */

.picker {
  position: relative;
  margin-top: clamp(1.8rem, 4vw, 2.6rem);
  padding-top: clamp(1.4rem, 3vw, 1.8rem);
  border-top: 1px solid var(--line);
}

.picker__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1rem 0 1.4rem;
}

.picker__tabs label {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.55rem 1.05rem;
  border: 1.5px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.25;
  cursor: pointer;
}
.picker__tabs label:hover { border-color: var(--copper); color: var(--copper); }

#r-all:checked ~ .picker__tabs label[for="r-all"],
#r-ss:checked  ~ .picker__tabs label[for="r-ss"],
#r-ef:checked  ~ .picker__tabs label[for="r-ef"],
#r-ac:checked  ~ .picker__tabs label[for="r-ac"] {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

#r-all:focus-visible ~ .picker__tabs label[for="r-all"],
#r-ss:focus-visible  ~ .picker__tabs label[for="r-ss"],
#r-ef:focus-visible  ~ .picker__tabs label[for="r-ef"],
#r-ac:focus-visible  ~ .picker__tabs label[for="r-ac"] {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

/* ---------- roof-type records (semantic table rendered as records) ---------- */

.roofs, .roofs thead, .roofs tbody, .roofs tr, .roofs th, .roofs td { display: block; }
.roofs { width: 100%; border-collapse: collapse; }

.roofs caption,
.firms caption {
  display: block;
  text-align: left;
  font-size: 0.86rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 0.85rem;
}

.roofs__row {
  background: var(--field);
  border: 1px solid var(--line-2);
  border-top: 4px solid var(--accent, var(--steel));
  border-radius: 12px;
  padding: 1.1rem 1.15rem 1.2rem;
  margin-bottom: 1rem;
}
.roofs__row:last-child { margin-bottom: 0; }
.roofs__row--ss { --accent: var(--steel); }
.roofs__row--ef { --accent: var(--copper); }
.roofs__row--ac { --accent: var(--moss); }

.roofs__row > th {
  text-align: left;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--accent);
  display: grid;
  grid-template-columns: 44px 1fr;
  grid-template-areas: "lab lab" "ico name";
  column-gap: 0.65rem;
  row-gap: 0.3rem;
  align-items: center;
  margin-bottom: 0.9rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line-2);
}
.roofs__row > th::before {
  content: attr(data-label);
  grid-area: lab;
  font-size: 0.74rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--muted);
}

.glyph { grid-area: ico; width: 44px; height: 26px; color: var(--accent); }
.roofs__name { grid-area: name; }

.roofs__row > td { margin-bottom: 0.9rem; }
.roofs__row > td:last-child { margin-bottom: 0; }

.roofs td::before,
.firms td::before,
.firms th[data-label]::before {
  content: attr(data-label);
  display: block;
  font-size: 0.74rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 0.2rem;
}
.firms th[data-label]::before { color: var(--muted); }

@media (min-width: 46em) {
  .roofs__row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1.7rem; }
  .roofs__row > th { grid-column: 1 / -1; }
  .roofs__row > td { margin-bottom: 0; }
}

/* selection filter — default state shows every roof type */
#r-ss:checked ~ .roofs tbody tr:not([data-roof="ss"]),
#r-ef:checked ~ .roofs tbody tr:not([data-roof="ef"]),
#r-ac:checked ~ .roofs tbody tr:not([data-roof="ac"]) { display: none; }

/* ---------- company comparison: two equal panels ---------- */

.firms { width: 100%; border-collapse: collapse; margin-top: 1.6rem; }
.firms, .firms thead, .firms tbody, .firms tr, .firms th, .firms td { display: block; }

.firms tbody { display: grid; gap: 1rem; }

.firms tbody tr {
  background: var(--paper);
  border: 1px solid var(--line-2);
  border-top: 4px solid var(--steel);
  border-radius: 12px;
  padding: 1.15rem 1.15rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.firms tbody th {
  text-align: left;
  font-size: 1.1rem;
  font-weight: 700;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--line-2);
}
.firms tbody th a { color: var(--copper); }
.firms tbody th::before { margin-bottom: 0.3rem; }

@media (min-width: 46em) {
  .firms tbody { grid-template-columns: 1fr 1fr; gap: 1.25rem; }
}

.firms__after { margin-top: 1.5rem; }

/* ---------- drainage-path diagram ---------- */

.flow {
  margin: clamp(1.7rem, 4vw, 2.4rem) 0;
  padding: clamp(1.1rem, 3vw, 1.5rem);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.045);
}

.flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.flow__node {
  position: relative;
  display: grid;
  grid-template-columns: 44px 1fr;
  grid-template-areas: "ico name" "ico note";
  column-gap: 0.85rem;
  align-content: center;
}

.flow__ico { grid-area: ico; width: 40px; height: 32px; color: var(--copper-lt); align-self: center; }
.flow__name { grid-area: name; color: #fff; font-weight: 700; line-height: 1.3; }
.flow__note { grid-area: note; color: var(--on-dark-2); font-size: 0.92rem; line-height: 1.4; }

/* connector: down on phones */
.flow__node::after {
  content: "";
  position: absolute;
  left: 21px;
  bottom: -1.1rem;
  width: 0; height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 8px solid var(--copper-lt);
}
.flow__node:last-child::after { display: none; }

@media (min-width: 46em) {
  .flow__list { grid-template-columns: repeat(5, 1fr); gap: 1rem; }
  .flow__node {
    grid-template-columns: 1fr;
    grid-template-areas: "ico" "name" "note";
    text-align: center;
    row-gap: 0.45rem;
  }
  .flow__ico { justify-self: center; }
  .flow__note { font-size: 0.86rem; }
  .flow__node::after {
    left: auto;
    right: -0.72rem;
    bottom: auto;
    top: 12px;
    border-left: 8px solid var(--copper-lt);
    border-right: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
  }
}

.flow figcaption {
  margin-top: 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--on-dark-2);
  font-size: 0.94rem;
  line-height: 1.5;
}

/* ---------- snow-guard answer ---------- */

.a--big {
  font-size: clamp(1.15rem, 3.1vw, 1.42rem);
  line-height: 1.42;
  letter-spacing: -0.012em;
  font-weight: 500;
  margin-bottom: 1.3rem;
}

/* ---------- quote checklist ---------- */

.steps {
  list-style: none;
  counter-reset: step;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.steps li {
  counter-increment: step;
  position: relative;
  background: var(--steel-bg);
  border-radius: 12px;
  padding: 1.05rem 1.15rem 1.1rem 3.9rem;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 1.05rem;
  top: 1rem;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--steel);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.close { margin-top: 1.5rem; }

/* ---------- footer ---------- */

.foot {
  background: var(--graphite-2);
  color: var(--on-dark-2);
  padding-block: clamp(2rem, 5vw, 2.8rem);
  font-size: 0.95rem;
}
.foot p { margin-bottom: 0.75rem; }
.foot a { color: var(--copper-lt); }
.foot :focus-visible { outline-color: var(--focus-dark); }

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

/* ---------- architectural redesign ---------- */

:root {
  --rail: 72rem;
  --read: 47rem;
  --graphite: #142b3b;
  --graphite-2: #0d2230;
  --steel-bg: #edf3f5;
  --field: #fbfaf7;
  --sand: #f1e7d9;
  --copper: #a9471e;
  --copper-lt: #efab72;
  --steel: #17617a;
  --moss: #50663d;
}

body {
  background: #f8f6f1;
  font-size: 1.075rem;
}

.rail {
  max-width: var(--rail);
  padding-inline: clamp(1.2rem, 4vw, 3rem);
}

.open {
  position: relative;
  overflow: hidden;
  padding-block: clamp(2.6rem, 6vw, 5.4rem);
  background:
    radial-gradient(circle at 88% 18%, rgba(127, 182, 207, .14), transparent 29rem),
    linear-gradient(135deg, #0d2230 0%, #17394b 100%);
  border-bottom: 0;
}

.open::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 6px;
  background: linear-gradient(90deg, var(--copper) 0 34%, var(--copper-lt) 34% 49%, #6f98a9 49% 100%);
}

.open__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 4.8rem);
  align-items: center;
}

.open__copy { min-width: 0; }

.open h1 {
  max-width: 15ch;
  font-size: clamp(2.25rem, 5.2vw, 4.25rem);
  line-height: 1.03;
  letter-spacing: -.045em;
}

.answer {
  max-width: 48rem;
  margin-top: 1.65rem;
  padding: 1.15rem 0 0 1.25rem;
  border-top: 0;
  border-left: 4px solid var(--copper-lt);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
}

.open__sub {
  max-width: 45rem;
  color: #cbd6dc;
}

.xsec {
  position: relative;
  margin: 0;
  padding: clamp(1rem, 2.5vw, 1.65rem);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 1.4rem;
  background: rgba(255,255,255,.075);
  box-shadow: 0 24px 60px rgba(0,0,0,.22);
}

.xsec::before {
  content: "METAL ROOF EDGE";
  display: block;
  margin-bottom: .25rem;
  color: var(--copper-lt);
  font-size: .73rem;
  font-weight: 800;
  letter-spacing: .16em;
}

.xsec svg {
  border: 0;
  padding: 0;
}

.xsec figcaption {
  margin-top: .45rem;
  padding-top: .85rem;
  border-top: 1px solid rgba(255,255,255,.14);
  color: #d6e0e5;
  font-size: .9rem;
  line-height: 1.45;
}

.sec {
  padding-block: clamp(3.6rem, 7vw, 6.3rem);
}

.sec > .rail > h2 {
  max-width: 24ch;
  font-size: clamp(1.75rem, 3.4vw, 2.85rem);
  line-height: 1.08;
  letter-spacing: -.035em;
}

.sec > .rail > .a {
  max-width: var(--read);
  margin-top: 1.35rem;
  font-size: clamp(1.08rem, 1.8vw, 1.25rem);
}

.sec > .rail > p:not(.a):not(.firms__after):not(.close) {
  max-width: var(--read);
}

.sec--attach { background: #fff; }
.sec--firms { background: linear-gradient(180deg, #e8f0f2, #f3f6f6); }
.sec--flow { background: linear-gradient(145deg, #102735, #173747); }
.sec--snow { background: linear-gradient(135deg, #f4eadc, #eee4d5); }
.sec--quote { background: #fff; }

.picker {
  margin-top: clamp(2.4rem, 5vw, 4rem);
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: #f7f5f0;
  box-shadow: 0 18px 50px rgba(24, 40, 48, .08);
}

.picker h3 { font-size: clamp(1.3rem, 2.3vw, 1.75rem); }

.picker__tabs {
  margin-block: 1.25rem 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.picker__tabs label {
  background: #fff;
  border-width: 2px;
}

.roofs tbody { display: grid; gap: 1rem; }

.roofs__row {
  min-width: 0;
  height: 100%;
  margin: 0;
  padding: 1.35rem;
  background: #fff;
  box-shadow: 0 8px 24px rgba(22, 44, 56, .06);
}

.roofs__row > th { font-size: 1.16rem; }
.roofs__row > td { font-size: .98rem; line-height: 1.55; }

.firms {
  margin-top: clamp(2rem, 4vw, 3.25rem);
}

.firms tbody { gap: 1.5rem; }

.firms tbody tr {
  gap: 0;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: 1.25rem;
  background: #fff;
  box-shadow: 0 18px 42px rgba(22, 46, 60, .12);
}

.firms tbody th,
.firms tbody td {
  padding: 1.05rem 1.35rem;
}

.firms tbody th {
  min-height: 5.4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--graphite);
  border: 0;
  font-size: 1.28rem;
}

.firms tbody th::before { color: #a9c2ce; }
.firms tbody th a { color: #fff; }
.firms tbody td { border-top: 1px solid var(--line-2); }
.firms tbody td::before { color: var(--steel); margin-bottom: .35rem; }

.firms__after {
  max-width: 57rem;
  margin-top: 2rem;
  padding: 1.3rem 1.5rem;
  border-left: 4px solid var(--steel);
  background: rgba(255,255,255,.72);
  font-size: 1.03rem;
}

.flow {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding: clamp(1.25rem, 3vw, 2rem);
  border-radius: 1.4rem;
  background: rgba(255,255,255,.07);
  box-shadow: inset 0 1px rgba(255,255,255,.1);
}

.flow__node {
  padding: .9rem;
  border-radius: .85rem;
  background: rgba(255,255,255,.045);
}

.flow__name { font-size: 1.02rem; }
.flow__ico { width: 46px; height: 38px; }

.a--big {
  max-width: 56rem !important;
  padding: 1.35rem 1.5rem;
  border-left: 5px solid var(--moss);
  background: rgba(255,255,255,.56);
  font-size: clamp(1.22rem, 2.3vw, 1.65rem) !important;
}

.steps {
  margin-top: 2rem;
}

.steps li {
  border: 1px solid #dae3e7;
  background: #f2f6f7;
  box-shadow: 0 8px 22px rgba(21, 56, 72, .05);
}

.close {
  max-width: 55rem;
  margin-top: 2rem;
  font-size: 1.06rem;
}

@media (min-width: 46em) {
  body { font-size: 1.125rem; }

  .open__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(24rem, .88fr);
  }

  .roofs tbody {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
  }

  .roofs__row {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .roofs__row > th {
    display: grid;
    grid-template-columns: 44px 1fr;
    grid-template-areas: "lab lab" "ico name";
    grid-column: auto;
  }

  .roofs__row > td { margin: 0; }

  .firms tbody { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .flow__list { gap: .75rem; }

  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
}

@media (max-width: 45.99em) {
  .open h1 { font-size: clamp(2.05rem, 11vw, 3rem); }
  .answer { padding-left: 1rem; }
  .xsec { margin-top: .25rem; }
  .picker { padding: 1rem; }
  .picker__tabs { display: grid; grid-template-columns: 1fr; }
  .picker__tabs label { justify-content: center; width: 100%; }
  .firms tbody th { min-height: auto; }
}