/* Infrasynk Engineering — light paper blueprint */
:root {
  --navy:        #1B4876;
  --navy-mid:    #163A62;
  --navy-deep:   #12324F;
  --navy-ink:    #0C2438;
  --cyan:        #2AA8CC;
  --cyan-soft:   #A9D3E6;
  --paper:       #F3F7F9;
  --sheet:       #FFFFFF;
  --ink:         #12283C;
  --muted:       #3A566A;
  --line:        #C3D6E2;
  --text-inv:    #F4FBFD;
  --muted-inv:   #D2E6EE;
  --line-inv:    rgba(244, 251, 253, 0.22);
  --grad:        linear-gradient(120deg, #2AA8CC 0%, #1B4876 70%);
  --radius:      4px;
  --maxw:        1160px;
  --ease:        cubic-bezier(.22, .61, .36, 1);
  --header-h:    72px;
  --grid:        24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(42, 168, 204, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 168, 204, .08) 1px, transparent 1px);
  background-size: var(--grid) var(--grid);
  color: var(--ink);
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-optical-sizing: auto;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, .brand-name, .kicker, .eyebrow, .sched-no, .sys-tab, .stamp,
.sched-mark, .title-block dt, .plan-caption, .nav, .btn, .faq-q {
  font-family: "Sofia Sans Condensed", "Arial Narrow", system-ui, sans-serif;
  letter-spacing: -0.01em;
  line-height: 1.08;
  margin: 0;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--navy); color: #fff;
  padding: 10px 16px; border-radius: 0 0 8px 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

.kicker {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: .2em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--navy);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 26px; border-radius: 2px; font-weight: 600; font-size: 16px;
  letter-spacing: .04em; text-transform: uppercase;
  border: 1px solid transparent; cursor: pointer;
  transition: background .25s var(--ease), box-shadow .25s var(--ease),
    border-color .25s var(--ease), color .25s var(--ease);
}
.btn-primary {
  background: var(--navy); color: #fff;
  box-shadow: 0 8px 24px -8px rgba(27, 72, 118, .5);
}
.btn-ghost {
  background: transparent; color: var(--ink); border-color: var(--navy);
}

/* ===== Header ===== */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(243, 247, 249, .78);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease);
}
.site-header.scrolled {
  background: rgba(243, 247, 249, .96);
  border-bottom-color: var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  height: var(--header-h);
  min-width: 0;
}
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand img {
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 1px var(--line);
}
.brand-name {
  font-size: 20px; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase;
}
.brand-name em {
  font-style: normal; font-weight: 500; color: var(--cyan);
}

.nav { display: flex; align-items: center; gap: 28px; }
.nav a {
  font-size: 16px; color: var(--muted); font-weight: 600;
  letter-spacing: .06em; text-transform: uppercase;
  transition: color .2s var(--ease);
}
.nav .nav-cta {
  color: var(--ink); border: 1px solid var(--line);
  padding: 8px 18px; border-radius: 2px;
}

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 8px;
}
.nav-toggle span {
  width: 24px; height: 2px; background: var(--ink); border-radius: 2px;
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero: drafting sheet ===== */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 28px) 0 0;
}
.sheet {
  position: relative;
  margin: 0 18px 0;
  padding: 28px 0 0;
  background: var(--sheet);
  box-shadow:
    0 0 0 1px var(--line),
    0 0 0 7px var(--sheet),
    0 0 0 8px var(--cyan-soft),
    0 24px 50px -28px rgba(18, 40, 60, .28);
  overflow: clip;
}
.sheet-frame {
  pointer-events: none;
  position: absolute; inset: 12px;
  border: 1px solid rgba(27, 72, 118, .28);
  z-index: 1;
}
.sheet-frame::before,
.sheet-frame::after {
  content: "";
  position: absolute;
  width: 14px; height: 14px;
  border: 2px solid var(--navy);
}
.sheet-frame::before { top: -2px; left: -2px; border-right: 0; border-bottom: 0; }
.sheet-frame::after { bottom: -2px; right: -2px; border-left: 0; border-top: 0; }
.sheet-grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(42, 168, 204, .13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 168, 204, .13) 1px, transparent 1px),
    linear-gradient(rgba(27, 72, 118, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 72, 118, .16) 1px, transparent 1px);
  background-size: 16px 16px, 16px 16px, 80px 80px, 80px 80px;
  opacity: .7;
}

.hero-layout {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(260px, .95fr);
  gap: 28px;
  align-items: center;
  padding-top: 18px;
  padding-bottom: 18px;
}
.hero-layout > * { min-width: 0; }

.eyebrow {
  display: inline-block;
  font-size: 13px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--navy); font-weight: 600; margin: 0 0 16px;
}
.hero h1 {
  font-size: clamp(2.55rem, 5.8vw, 4.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  max-width: 12em;
  color: var(--navy);
  overflow-wrap: normal;
  hyphens: none;
}
.hero-sub {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  color: var(--muted);
  margin-top: 20px;
  max-width: min(46ch, 100%);
  overflow-wrap: break-word;
}
.hero-actions {
  display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px;
}

/* ===== Animated city plan ===== */
.hero-plan { position: relative; }
.plan-svg {
  width: min(100%, 480px);
  height: auto;
  display: block;
  margin: 0 auto;
}
.plan-streets .draw {
  stroke: var(--navy);
  stroke-width: 2.2;
  fill: none;
  stroke-linecap: square;
  stroke-dasharray: 520;
  stroke-dashoffset: 520;
  animation: draft 3.2s var(--ease) forwards;
}
.plan-streets .d1 { animation-delay: .1s; }
.plan-streets .d2 { animation-delay: .22s; }
.plan-streets .d3 { animation-delay: .34s; }
.plan-streets .d4 { animation-delay: .4s; }
.plan-streets .d5 { animation-delay: .48s; }
.plan-streets .d6 { animation-delay: .18s; }
.plan-streets .d7 { animation-delay: .3s; }
.plan-streets .d8 { animation-delay: .42s; }
.plan-streets .d9 { animation-delay: .54s; }

.plan-bridge .draw {
  stroke: var(--cyan);
  stroke-width: 2.4;
  fill: none;
  stroke-dasharray: 180;
  stroke-dashoffset: 180;
  animation: draft 1.6s var(--ease) .9s forwards;
}
.plan-river {
  stroke: var(--cyan-soft);
  stroke-width: 14;
  fill: none;
  stroke-linecap: round;
  opacity: .85;
  stroke-dasharray: 12 8;
  animation: river-flow 18s linear infinite;
}
.plan-util {
  stroke: var(--cyan);
  stroke-width: 1.6;
  stroke-dasharray: 6 5;
  fill: none;
  animation: util-pulse 3.6s ease-in-out infinite;
}
.plan-transit {
  stroke: var(--navy);
  stroke-width: 1.5;
  stroke-dasharray: 3 6;
  fill: none;
  animation: transit-run 10s linear infinite;
}
.plan-blocks .block {
  fill: rgba(27, 72, 118, .08);
  stroke: var(--navy);
  stroke-width: 1.2;
  opacity: 0;
  animation: fade-block .6s var(--ease) forwards;
}
.b1 { animation-delay: 1.1s; }
.b2 { animation-delay: 1.2s; }
.b3 { animation-delay: 1.3s; }
.b4 { animation-delay: 1.4s; }
.b5 { animation-delay: 1.5s; }
.b6 { animation-delay: 1.55s; }
.b7 { animation-delay: 1.6s; }
.b8 { animation-delay: 1.65s; }
.b9 { animation-delay: 1.7s; }

.north polygon { fill: var(--navy); }
.north text {
  fill: var(--navy);
  font-family: "Sofia Sans Condensed", sans-serif;
  font-size: 11px; font-weight: 700; letter-spacing: .12em;
}
.plan-dim path { stroke: var(--navy); stroke-width: 1; opacity: .55; }
.plan-dim text {
  fill: var(--navy);
  font-family: "Sofia Sans Condensed", sans-serif;
  font-size: 10px; letter-spacing: .16em; font-weight: 600;
}

.plotter {
  fill: var(--cyan);
  stroke: var(--navy);
  stroke-width: 1;
}

.plan-caption {
  margin: 8px 0 0;
  text-align: center;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--navy);
  font-weight: 600;
}

@keyframes draft { to { stroke-dashoffset: 0; } }
@keyframes fade-block { to { opacity: 1; } }
@keyframes river-flow { to { stroke-dashoffset: -80; } }
@keyframes util-pulse {
  0%, 100% { opacity: .55; }
  50% { opacity: 1; }
}
@keyframes transit-run { to { stroke-dashoffset: -120; } }

/* Title block */
.title-block {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border: 1px solid var(--navy);
  margin: 8px 0 0;
  background: var(--sheet);
}
.title-block > div {
  padding: 10px 12px 12px;
  border-right: 1px solid var(--navy);
  min-width: 0;
}
.title-block > div:last-child { border-right: 0; }
.title-block dt {
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
  font-weight: 700;
  margin-bottom: 4px;
}
.title-block dd {
  margin: 0;
  font-family: "Sofia Sans Condensed", sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
  overflow-wrap: anywhere;
}

/* ===== Sections ===== */
.section { padding: 88px 0; }
.section-head { margin-bottom: 40px; max-width: 640px; }
.section-head h2 {
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 14px;
}
.lead {
  color: var(--muted);
  font-size: 1.08rem;
  overflow-wrap: anywhere;
}

/* Systems as overlapping drawing sheets */
.sheet-stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 20px;
}
.sys-sheet {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  background: var(--sheet);
  border: 1px solid var(--line);
  min-height: 100%;
  min-width: 0;
  box-shadow: 4px 6px 0 rgba(27, 72, 118, .06);
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.sys-tab {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  display: flex; align-items: center; justify-content: center;
  background: var(--navy);
  color: var(--text-inv);
  font-size: 13px;
  letter-spacing: .18em;
  font-weight: 700;
}
.sys-body { padding: 24px 22px 26px; }
.sys-body h3 {
  font-size: 1.7rem;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 10px;
}
.sys-body p { color: var(--muted); margin-bottom: 14px; }
.sys-body li {
  position: relative;
  padding-left: 16px;
  color: var(--ink);
  font-size: .98rem;
  margin-top: 7px;
}
.sys-body li::before {
  content: "";
  position: absolute; left: 0; top: .62em;
  width: 8px; height: 1px;
  background: var(--cyan);
}

/* Pillars schedule */
.section-schedule {
  background: var(--sheet);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.schedule {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--navy);
}
.sched-row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr) 96px;
  gap: 18px;
  align-items: center;
  padding: 28px 8px;
  border-bottom: 1px solid var(--line);
  background: var(--sheet);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}
.sched-no {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: .02em;
}
.sched-copy h3 {
  font-size: 1.55rem;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 8px;
}
.sched-copy p { color: var(--muted); max-width: 62ch; }
.sched-mark {
  justify-self: end;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--navy);
  border: 1px solid var(--navy);
  padding: 8px 10px;
  font-weight: 700;
}

/* Quote / stamp */
.quote { padding: 72px 0; }
.quote-inner {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}
.stamp {
  display: inline-block;
  border: 2px solid var(--cyan);
  color: var(--cyan);
  padding: 6px 12px;
  font-size: 12px;
  letter-spacing: .22em;
  font-weight: 700;
  transform: rotate(-6deg);
  margin-bottom: 22px;
}
.quote-inner blockquote {
  margin: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-weight: 500;
  font-style: italic;
  font-size: clamp(1.45rem, 3.2vw, 2.2rem);
  line-height: 1.3;
  color: var(--navy);
}
.quote-attr {
  margin-top: 22px;
  color: var(--muted);
  letter-spacing: .16em;
  text-transform: uppercase;
  font-family: "Sofia Sans Condensed", sans-serif;
  font-size: 13px; font-weight: 600;
}

/* FAQ */
.faq-wrap {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 48px;
  align-items: start;
}
.faq-head { margin: 0; position: sticky; top: 100px; }
.faq-list { display: grid; gap: 12px; }
.faq-item {
  background: var(--sheet);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: border-color .3s var(--ease);
}
.faq-item.open { border-color: var(--navy); }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: none; border: 0; cursor: pointer; text-align: left; color: var(--ink);
  font-size: 1.15rem; font-weight: 600;
  padding: 20px 22px;
}
.faq-ico { position: relative; flex: 0 0 auto; width: 16px; height: 16px; }
.faq-ico::before, .faq-ico::after {
  content: ""; position: absolute; background: var(--navy); border-radius: 2px;
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.faq-ico::before { top: 7px; left: 0; width: 16px; height: 2px; }
.faq-ico::after { top: 0; left: 7px; width: 2px; height: 16px; }
.faq-item.open .faq-ico::after { transform: scaleY(0); opacity: 0; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-item.open .faq-a { max-height: 280px; }
.faq-a p { color: var(--muted); margin: 0; padding: 0 22px 20px; font-size: .98rem; }

/* Contact — dark navy, near-white type */
.contact {
  background: var(--navy-ink);
  color: var(--text-inv);
}
.contact .kicker { color: var(--cyan); }
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.contact-copy h2 {
  color: var(--text-inv);
  margin-bottom: 16px;
  text-transform: uppercase;
  font-size: clamp(2rem, 3.4vw, 2.8rem);
}
.contact-copy p { color: var(--muted-inv); margin-bottom: 20px; }
.contact-email {
  display: inline-block;
  font-family: "Sofia Sans Condensed", sans-serif;
  font-size: clamp(1.3rem, 2.2vw, 1.8rem);
  font-weight: 700;
  letter-spacing: .03em;
  color: #fff;
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
  overflow-wrap: anywhere;
}
.contact-addr {
  margin-top: 22px;
  color: var(--muted-inv);
  font-size: .98rem;
  line-height: 1.6;
}
.contact-form {
  background: rgba(42, 168, 204, .10);
  border: 1px solid var(--line-inv);
  padding: 28px;
  display: grid; gap: 16px;
}
.field { display: grid; gap: 7px; }
.field label {
  font-family: "Sofia Sans Condensed", sans-serif;
  font-size: 13px; color: var(--muted-inv); font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
}
.field input, .field textarea {
  background: var(--navy-deep);
  border: 1px solid var(--line-inv);
  border-radius: 2px;
  color: var(--text-inv);
  padding: 12px 14px;
  font: inherit; font-size: 15px;
  width: 100%; resize: vertical;
  transition: border-color .2s var(--ease);
}
.field input::placeholder, .field textarea::placeholder { color: rgba(210, 230, 238, .55); }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--cyan); }
.contact-form .btn { margin-top: 4px; justify-self: start; }
.contact .btn-primary {
  background: var(--cyan); color: var(--navy-ink);
  box-shadow: 0 8px 24px -8px rgba(42, 168, 204, .55);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--sheet);
  padding: 48px 0 26px;
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 30px; flex-wrap: wrap;
  padding-bottom: 28px; border-bottom: 1px solid var(--line);
}
.footer-tag { color: var(--muted); margin: 12px 0 0; font-size: .95rem; }
.footer-nav { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-nav a {
  font-family: "Sofia Sans Condensed", sans-serif;
  color: var(--muted); font-size: 15px; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
}
.footer-bottom {
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  color: var(--muted); font-size: 14px; padding-top: 20px;
}

/* ===== Reveal ===== */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .plan-streets .draw,
  .plan-bridge .draw,
  .plan-blocks .block,
  .plan-river, .plan-util, .plan-transit { animation: none; }
  .plotter { display: none; }
  .plan-streets .draw, .plan-bridge .draw { stroke-dashoffset: 0; stroke-dasharray: none; }
  .plan-blocks .block { opacity: 1; }
}

/* Hover AFTER reveal.in so lift is not overwritten */
@media (hover: hover) and (pointer: fine) {
  .btn { transition: transform .25s var(--ease), background .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease); }
  .btn-primary:hover {
    transform: translateY(-2px);
    background: var(--navy-mid);
    box-shadow: 0 14px 34px -8px rgba(27, 72, 118, .7);
  }
  .contact .btn-primary:hover {
    background: #5ec4df;
    color: var(--navy-ink);
  }
  .btn-ghost:hover {
    border-color: var(--cyan);
    color: var(--navy);
    transform: translateY(-2px);
  }
  .nav a:hover { color: var(--ink); }
  .nav .nav-cta:hover { border-color: var(--navy); color: var(--navy); }
  .sys-sheet.reveal.in:hover,
  .sys-sheet:hover {
    transform: translateY(-6px);
    border-color: var(--navy);
    box-shadow: 8px 14px 0 rgba(27, 72, 118, .10);
  }
  .sched-row.reveal.in:hover,
  .sched-row:hover {
    transform: translateY(-3px);
    background: #F7FBFC;
    box-shadow: 0 10px 24px -16px rgba(27, 72, 118, .35);
  }
  .faq-item:hover { border-color: var(--navy); }
  .faq-q:hover { color: var(--navy); }
  .contact-email:hover { border-bottom-color: #fff; }
  .footer-nav a:hover { color: var(--navy); }
  .contact-form.reveal.in:hover,
  .contact-form:hover { border-color: var(--cyan); }
  .stamp:hover { transform: rotate(0deg); }
}

/* Mobile tap contrast when hover is unavailable */
@media (hover: none) {
  .nav a { color: var(--ink); }
  .btn-primary { background: var(--navy); color: #fff; }
  .contact .btn-primary { background: var(--cyan); color: var(--navy-ink); }
  .btn-ghost { color: var(--ink); border-color: var(--navy); }
  .contact-copy p, .contact-addr { color: var(--text-inv); }
  .faq-q { color: var(--ink); }
  .sys-body p, .sched-copy p { color: var(--ink); }
}

/* ===== Responsive ===== */
@media (max-width: 980px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .title-block { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .title-block > div:nth-child(3) { border-right: 0; }
  .title-block > div:nth-child(3n) { border-right: 0; }
  .title-block > div:nth-child(n+4) { border-top: 1px solid var(--navy); }
  .sheet-stack,
  .faq-wrap,
  .contact-inner { grid-template-columns: 1fr; }
  .faq-head { position: static; }
  .plan-svg { width: min(100%, 400px); }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; gap: 4px; align-items: stretch;
    background: rgba(255, 255, 255, .98);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    padding: 16px 24px 24px;
    transform: translateY(-120%);
    transition: transform .35s var(--ease);
    z-index: 90;
  }
  .nav.open { transform: translateY(0); }
  .nav a {
    padding: 12px 4px; font-size: 18px; color: var(--ink);
    border-bottom: 1px solid var(--line);
  }
  .nav .nav-cta {
    text-align: center; margin-top: 10px;
    border-color: var(--navy); color: var(--navy);
  }
  .hero h1 { font-size: clamp(2.2rem, 11vw, 3.2rem); }
  .section { padding: 68px 0; }
  .brand-name { font-size: 16px; }
  .sheet {
    margin: 0 10px 0;
    box-shadow:
      0 0 0 1px var(--line),
      0 18px 36px -24px rgba(18, 40, 60, .28);
  }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  .sheet-stack { grid-template-columns: 1fr; gap: 14px; }
  .sched-row {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 12px;
    padding: 22px 4px 22px 0;
  }
  .sched-mark { display: none; }
  .title-block { grid-template-columns: 1fr 1fr; }
  .title-block > div { border-right: 1px solid var(--navy); }
  .title-block > div:nth-child(even) { border-right: 0; }
  .title-block > div:nth-child(n+3) { border-top: 1px solid var(--navy); }
  .hero-actions { gap: 10px; }
}

@media (max-width: 480px) {
  .container { padding-left: 20px; padding-right: 20px; }
  .hero { padding: calc(var(--header-h) + 14px) 0 0; }
  .sheet { margin: 0 8px 0; padding-top: 18px; }
  .hero-layout { padding-top: 8px; gap: 10px; }
  .hero-actions { gap: 10px; }
  .btn { width: 100%; }
  .title-block { grid-template-columns: 1fr; }
  .title-block > div { border-right: 0; }
  .title-block > div:nth-child(n+2) { border-top: 1px solid var(--navy); }
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 32px; }
  .sys-sheet { grid-template-columns: 40px minmax(0, 1fr); }
  .sys-body { padding: 20px 16px 22px; }
  .sys-body h3 { font-size: 1.45rem; }
  .sched-no { font-size: 1.8rem; }
  .contact-inner { gap: 32px; }
  .contact-form { padding: 22px 18px; }
  .faq-q { padding: 18px 16px; font-size: 1.05rem; color: var(--ink); }
  .footer-inner { flex-direction: column; gap: 20px; }
  .quote { padding: 52px 0; }
  .hero-sub { font-size: 1.02rem; }
  .title-block dt { font-size: 9px; }
  .title-block dd { font-size: 14px; }
  .plan-svg { width: 100%; }
}