/* LTH Structural Design: old-fashioned blueprint.
   Layout: left-aligned single column (max ~70ch for reading), hero splits headline | elevation drawing,
   footer set as a drawing-sheet title block. One bold element: the beam drawing.
   Deliberately single-look (a blueprint is always blue), so no light/dark swap. */
:root {
  --paper: #1d4a84;      /* cyanotype blue */
  --paper-2: #183f72;    /* panel: slightly deeper blue */
  --ink: #f2f6fb;        /* white linework and text */
  --ink-2: #f2f6fb;      /* secondary text: same bright white as titles (client preference) */
  --rule: #5d7fae;       /* drawing lines, borders */
  --grid: rgba(220, 233, 250, 0.07);
  --grid-major: rgba(220, 233, 250, 0.13);
  --oxide: #fdd930;      /* highlighter yellow: the beam, step numbers and the main action */
  --on-oxide: #13325c;
  --focus: #ffffff;
  --header-bg: #102c52;   /* darker blue for the top bar */
  --header-line: #c9a10a; /* darker yellow line under the top bar */
  --sheet: #ffffff;       /* white, as in the logo's word box */
  --sheet-ink: #000000;
  color-scheme: dark;
  --display: "Zilla Slab", Rockwell, "Roboto Slab", Georgia, serif;
  --body: "Work Sans", "Helvetica Neue", Arial, sans-serif;
  --ui: "Work Sans", "Helvetica Neue", Arial, sans-serif;
  --measure: 68ch;
  --wrap: 72rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.125rem;
  line-height: 1.6;
}
img, svg { max-width: 100%; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--oxide); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 2px; }

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

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  text-wrap: balance;
  margin: 0;
}
h1 { font-size: clamp(2.5rem, 6.5vw, 4.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: 1.35rem; line-height: 1.2; }
p { margin: 0; }
.lead { font-size: 1.3rem; line-height: 1.5; color: var(--ink-2); max-width: 46ch; }

/* Header */
.site-header { border-bottom: 1px solid var(--rule); }
.site-header .wrap {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 0.75rem 1.5rem; padding-block: 1rem;
}
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--ink); }
.brand svg { width: 2rem; height: 2rem; flex: none; }
.brand-name { font-family: var(--display); font-weight: 700; font-size: 1.6rem; line-height: 1; }
.brand-sub { display: block; font-family: var(--ui); font-weight: 500; font-size: 0.8rem; color: var(--ink-2); letter-spacing: 0.02em; margin-top: 0.15rem; }
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 0.25rem 1.25rem; font-family: var(--ui); font-size: 1rem; }
.nav a { text-decoration: none; padding-block: 0.4rem; text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.95rem; }
.nav a[aria-current="page"] { text-decoration: underline; text-decoration-color: var(--oxide); text-decoration-thickness: 2px; }

.button {
  display: inline-block; font-family: var(--ui); font-weight: 600; font-size: 1rem;
  background: var(--oxide); color: var(--on-oxide); text-decoration: none;
  padding: 0.75rem 1.25rem; border-radius: 3px; border: 2px solid var(--oxide);
  cursor: pointer; text-transform: uppercase; letter-spacing: 0.06em;
}
.button:hover { color: var(--on-oxide); filter: brightness(1.08); }
.button.ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.button.ghost:hover { border-color: var(--ink); color: var(--ink); filter: none; }
.nav .button { padding: 0.5rem 1rem; }

/* Sections */
main { display: block; }
.section { padding-block: clamp(3rem, 7vw, 5.5rem); }
.section + .section { border-top: 1px solid var(--rule); }
.section-head { display: grid; gap: 0.75rem; margin-bottom: 2rem; max-width: var(--measure); }
.section-head p { color: var(--ink-2); }

/* Hero */
.hero .wrap {
  display: grid; gap: 2.5rem; align-items: center;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  padding-block: clamp(2.5rem, 6vw, 5rem);
}
.hero-copy { display: grid; gap: 1.5rem; min-width: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.drawing { min-width: 0; }
.drawing svg { display: block; width: 100%; height: auto; }
.drawing figcaption { font-family: var(--ui); font-size: 0.85rem; color: var(--ink-2); margin-top: 0.5rem; }
.dwg-line { stroke: var(--ink); fill: none; stroke-width: 1.5; }
.dwg-thin { stroke: var(--ink-2); fill: none; stroke-width: 1; }
.dwg-hatch { stroke: var(--rule); stroke-width: 1; }
.dwg-fill { fill: var(--paper-2); stroke: var(--ink); stroke-width: 1.5; }
.dwg-beam { fill: var(--oxide); }
.dwg-pad { fill: #000000; }
.dwg-solid { fill: var(--paper-2); stroke: none; }
.dwg-text { fill: var(--ink); font-family: var(--ui); font-size: 13px; }
.dwg-text.muted { fill: var(--ink-2); }
.dwg-beam-text { fill: var(--oxide); font-family: var(--ui); font-weight: 700; font-size: 14px; }

@media (prefers-reduced-motion: no-preference) {
  .dwg-beam { transform-box: fill-box; transform-origin: left center; animation: place 900ms 250ms cubic-bezier(.2,.7,.2,1) both; }
  @keyframes place { from { transform: scaleX(0.02); } to { transform: scaleX(1); } }
}

/* Service list (rows, not cards) */
.service-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule); }
.service-list li { border-bottom: 1px solid var(--rule); }
.service-list a {
  display: grid; grid-template-columns: minmax(0, 16rem) minmax(0, 1fr); gap: 0.5rem 2rem;
  padding-block: 1.25rem; text-decoration: none; align-items: baseline;
}
.service-list a:hover h3 { color: var(--oxide); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 0.15em; }
.service-list p { color: var(--ink-2); max-width: 56ch; }

/* Process: a real sequence, so it is numbered */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.5rem 2rem; grid-template-columns: repeat(4, minmax(0, 1fr)); counter-reset: step; }
.steps li { counter-increment: step; display: grid; gap: 0.5rem; align-content: start; border-top: 2px solid var(--ink); padding-top: 0.9rem; min-width: 0; }
.steps li::before { content: counter(step); font-family: var(--display); font-weight: 700; font-size: 2.25rem; line-height: 1; color: var(--oxide); }
.steps p { color: var(--ink-2); font-size: 1.05rem; }

/* Facts */
.facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem 2rem; margin: 0; }
.facts div { display: grid; gap: 0.4rem; min-width: 0; }
.facts dt { font-family: var(--display); font-weight: 700; font-size: 1.35rem; line-height: 1.2; }
.facts dd { margin: 0; color: var(--ink-2); }

/* Areas */
.areas { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.areas li { font-family: var(--ui); font-size: 1rem; border: 1px solid var(--rule); border-radius: 2px; padding: 0.3rem 0.7rem; background: var(--paper-2); }
.note { margin-top: 1.25rem; color: var(--ink-2); }

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 2.5rem; align-items: start; }

.band { background: var(--paper-2); color: var(--ink); border-block: 2px solid var(--ink); }
.band .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem; padding-block: 2.75rem; }
.band h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); max-width: 26ch; }
.band p { color: var(--ink-2); margin-top: 0.5rem; }
.band .button { background: var(--oxide); border-color: var(--oxide); color: var(--on-oxide); }

/* Inner pages */
.page-head .wrap { display: grid; gap: 1.25rem; padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 3vw, 2.5rem); }
.crumbs { font-family: var(--ui); font-size: 0.95rem; color: var(--ink-2); }
.crumbs a { color: var(--ink-2); }
.page-body .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 20rem); gap: 3rem; padding-block: 1rem clamp(3rem, 6vw, 5rem); align-items: start; }
.prose { display: grid; gap: 1.1rem; max-width: var(--measure); min-width: 0; }
.prose h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 1.25rem; }
.prose ul { margin: 0; padding-left: 1.25rem; display: grid; gap: 0.4rem; }
.prose li::marker { color: var(--oxide); }
.aside { border: 1px solid var(--rule); background: var(--paper-2); padding: 1.25rem 1.25rem 1.5rem; display: grid; gap: 0.9rem; border-radius: 3px; min-width: 0; position: sticky; top: calc(env(safe-area-inset-top, 0px) + 1rem); }
.aside h2 { font-size: 1.4rem; }
.aside ul { margin: 0; padding-left: 1.1rem; display: grid; gap: 0.35rem; font-size: 1rem; }
.aside li::marker { color: var(--oxide); }
.aside .button { text-align: center; }

.faq { display: grid; gap: 0; border-top: 1px solid var(--rule); }
.faq details { border-bottom: 1px solid var(--rule); padding-block: 0.9rem; }
.faq summary { font-family: var(--display); font-weight: 700; font-size: 1.2rem; cursor: pointer; }
.faq details p { margin-top: 0.6rem; color: var(--ink-2); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 3rem; padding-block: 0.5rem clamp(3rem, 6vw, 5rem); align-items: start; }
form { display: grid; gap: 1.1rem; min-width: 0; }
.field { display: grid; gap: 0.35rem; }
.field-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1.1rem; }
label { font-family: var(--ui); font-weight: 600; font-size: 0.95rem; }
.hint { font-family: var(--ui); font-weight: 400; color: var(--ink-2); }
input, select, textarea {
  font: inherit; font-size: 1rem; color: var(--ink); background: var(--paper-2);
  border: 1px solid var(--ink-2); border-radius: 3px; padding: 0.65rem 0.75rem; width: 100%;
}
textarea { min-height: 9rem; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 3px solid var(--focus); outline-offset: 1px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-status { font-family: var(--ui); font-size: 1rem; padding: 0.8rem 1rem; border-radius: 3px; border: 1px solid var(--rule); background: var(--paper-2); }
.contact-info { display: grid; gap: 1.5rem; }
.contact-info h2 { font-size: 1.4rem; margin-bottom: 0.4rem; }
.contact-info p, .contact-info li { color: var(--ink-2); }
.contact-info ul { margin: 0; padding-left: 1.1rem; display: grid; gap: 0.3rem; }
.email { font-family: var(--ui); font-weight: 600; font-size: 1.15rem; color: var(--ink); word-break: break-all; }

/* Footer: drawing-sheet title block */
.site-footer { padding-block: 2.5rem 3rem; }
.titleblock {
  display: grid; grid-template-columns: 2fr 2fr 1.3fr 1.3fr;
  border: 2px solid var(--ink); font-family: var(--ui); font-size: 0.95rem;
}
.titleblock > div { padding: 0.75rem 0.9rem; border-left: 1px solid var(--ink); display: grid; gap: 0.2rem; align-content: start; min-width: 0; }
.titleblock > div:first-child { border-left: 0; }
.titleblock .k { font-size: 0.75rem; color: var(--ink-2); letter-spacing: 0.02em; }
.titleblock .v { color: var(--ink); overflow-wrap: anywhere; }
.titleblock .big { font-family: var(--display); font-weight: 700; font-size: 1.5rem; line-height: 1.05; }
.foot-links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; margin-top: 1rem; font-family: var(--ui); font-size: 0.9rem; color: var(--ink-2); }
.foot-links a { color: var(--ink-2); }
.todo { background: #ffb3c1; color: #4a0f1c; padding: 0 0.25em; border-radius: 2px; }

@media (max-width: 60rem) {
  .hero .wrap, .split, .page-body .wrap, .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .facts { grid-template-columns: minmax(0, 1fr); }
  .aside { position: static; }
  .titleblock { grid-template-columns: 1fr 1fr; }
  .titleblock > div:nth-child(3) { border-left: 0; }
  .titleblock > div:nth-child(n+3) { border-top: 1px solid var(--ink); }
}
@media (max-width: 36rem) {
  body { font-size: 1.0625rem; }
  .service-list a { grid-template-columns: minmax(0, 1fr); }
  .steps, .field-row { grid-template-columns: minmax(0, 1fr); }
  .titleblock { grid-template-columns: minmax(0, 1fr); }
  .titleblock > div { border-left: 0; }
  .titleblock > div + div { border-top: 1px solid var(--ink); }
}

::placeholder { color: var(--ink-2); opacity: 0.8; }
::selection { background: var(--oxide); color: var(--on-oxide); }

/* Panels: a solid blueprint box behind every block of text, so it reads cleanly over the grid */
.panel {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: clamp(1.25rem, 3.5vw, 2.25rem);
  min-width: 0;
}
.section { padding-block: clamp(1rem, 2.5vw, 1.75rem); }
.section + .section { border-top: 0; }
main > .section:last-of-type { padding-bottom: clamp(2.5rem, 5vw, 4rem); }
.hero .wrap { padding-block: clamp(2rem, 5vw, 4rem) clamp(1rem, 2.5vw, 1.75rem); }
.page-head .wrap { display: block; padding-block: clamp(2rem, 5vw, 3.5rem) 1.5rem; }
.page-head .panel { display: grid; gap: 1.25rem; }
.page-body .wrap { padding-top: 0; }
.prose.panel { max-width: none; }
.prose.panel > * { max-width: var(--measure); }
.prose.panel > .faq { max-width: var(--measure); }
.panel .section-head:last-child { margin-bottom: 0; }
.contact-grid { padding-top: 0; }
.stack { display: grid; gap: 1rem; max-width: var(--measure); min-width: 0; }

/* Logo in the header */
.brand img { display: block; height: 2.75rem; width: auto; max-width: 100%; }
@media (max-width: 36rem) { .brand img { height: 2.25rem; } }

/* Menu links share one white box, matching the logo's word box */
.nav-links {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.25rem 1.25rem;
  background: var(--sheet); border: 2px solid var(--sheet-ink); padding: 0.35rem 1rem;
}
.nav-links a { color: var(--sheet-ink); }
.nav-links a:hover { color: var(--paper); }
.nav-links a[aria-current="page"] { text-decoration-color: var(--paper); }
.nav-links a:focus-visible { outline-color: var(--paper); }

/* Top bar: darker blue with a darker yellow rule along the bottom */
.site-header { background: var(--header-bg); border-bottom: 4px solid var(--header-line); }

/* Hero copy runs full width; the diagram sits in its own section below the services */
.hero .wrap { grid-template-columns: minmax(0, 1fr); }
.hero .lead { max-width: 60ch; }
.drawing-section .drawing { max-width: 44rem; margin-inline: auto; }
.page-head + .section { padding-top: 0; }

/* Single-column body (home page About content) */
.page-body.full .wrap { grid-template-columns: minmax(0, 1fr); }
.prose > h2:first-child { margin-top: 0; }

/* "Why homeowners and builders use us": points stacked one above another */
.facts { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; max-width: var(--measure); }

/* How it works: rule sits under each step title, level across all steps */
.steps { grid-auto-rows: auto; row-gap: 0.6rem; }
.steps li {
  grid-row: span 3; display: grid; grid-template-rows: subgrid; gap: 0.6rem;
  border-top: 0; padding-top: 0; margin-bottom: 1rem;
}
.steps li h3 {
  display: flex; align-items: flex-start; align-self: stretch;
  border-bottom: 2px solid var(--ink); padding-bottom: 0.6rem;
}