:root {
  --ink: #162133;
  --muted: #5e6a78;
  --navy: #12385b;
  --blue: #246fa8;
  --sky: #d9edf7;
  --teal: #1d7f78;
  --green: #2f7d5c;
  --amber: #c88612;
  --line: #dbe4ec;
  --soft: #f5f8fb;
  --white: #ffffff;
  --shadow: 0 18px 44px rgba(22, 33, 51, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

body.nav-open {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

button,
input,
select,
textarea {
  font: inherit;
}

section {
  scroll-margin-top: 92px;
}

.container {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 76px;
  padding: 0 32px;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 760;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: var(--white);
  background: var(--navy);
  border-radius: 8px;
  font-size: 0.82rem;
  line-height: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  color: #334257;
  font-size: 0.94rem;
}

.site-nav a {
  padding: 8px 0;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 720;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background-color 160ms ease,
    border-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 12px 24px rgba(36, 111, 168, 0.2);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #1c5f94;
}

.button-secondary {
  color: var(--ink);
  background: var(--white);
  border-color: rgba(255, 255, 255, 0.7);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: var(--sky);
}

.button-outline {
  color: var(--blue);
  background: var(--white);
  border-color: var(--blue);
}

.button-outline:hover,
.button-outline:focus-visible {
  background: var(--sky);
}

.hero {
  min-height: 690px;
  display: flex;
  align-items: center;
  color: var(--white);
  background-image:
    linear-gradient(90deg, rgba(10, 28, 48, 0.9), rgba(10, 28, 48, 0.62) 48%, rgba(10, 28, 48, 0.22)),
    url("assets/hero-portable-ac.jpg");
  background-position: center;
  background-size: cover;
}

.hero-inner {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 68px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 0.82rem;
  font-weight: 780;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #aee9ee;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
}

h1 {
  max-width: 780px;
  font-size: 4rem;
}

h2 {
  color: var(--ink);
  font-size: 2.2rem;
}

h3 {
  color: var(--ink);
  font-size: 1.08rem;
}

.hero-copy {
  max-width: 680px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.16rem;
}

.compliance-note {
  max-width: 720px;
  margin: 18px 0 0;
  padding-left: 14px;
  color: #eef7fb;
  border-left: 4px solid #aee9ee;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.trust-points {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  max-width: 850px;
  padding: 0;
  margin: 42px 0 0;
  list-style: none;
}

.trust-points li {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 12px;
  color: rgba(255, 255, 255, 0.94);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
}

.trust-points li::before,
.check-list li::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  background: var(--green);
  border-radius: 50%;
}

.section {
  padding: 84px 0;
}

.section-compact {
  padding-top: 56px;
}

.section-band {
  background: var(--soft);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading.split {
  max-width: none;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.section-heading p + h2,
.two-column p + h2 {
  margin-top: 4px;
}

.section-intro {
  max-width: 720px;
  margin: 14px 0 0;
  color: var(--muted);
}

.section-heading + p {
  margin-top: 0;
}

.card-grid {
  display: grid;
  gap: 18px;
}

.card-grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card,
.product-card,
.download-panel,
.request-documents,
.inquiry-form,
.contact-card,
.faq-list details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.info-card {
  padding: 24px;
}

.info-card p {
  margin: 12px 0 0;
  color: var(--muted);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.product-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  box-shadow: 0 12px 28px rgba(22, 33, 51, 0.06);
}

.product-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  padding: 16px;
  object-fit: contain;
  background: #ffffff;
}

.product-content {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 22px;
}

.product-content p {
  margin: 10px 0 0;
  color: var(--muted);
}

.product-model {
  display: inline-flex;
  align-self: flex-start;
  margin: 0 0 10px;
  padding: 5px 8px;
  color: var(--teal);
  background: #e8f4f2;
  border: 1px solid #c7e2de;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 760;
}

.feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 16px 0 0;
  list-style: none;
}

.feature-list li {
  padding: 6px 9px;
  color: #2e495d;
  background: #f6fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.86rem;
  font-weight: 650;
}

.product-specs {
  display: grid;
  gap: 8px;
  margin: 18px 0;
}

.technical-details {
  margin: 0 0 16px;
  border-top: 1px solid var(--line);
}

.technical-details summary {
  padding: 12px 0;
  color: var(--blue);
  font-weight: 740;
  cursor: pointer;
}

.detail-specs {
  margin: 0 0 12px;
}

.product-specs div,
.spec-list div {
  display: grid;
  grid-template-columns: minmax(118px, 0.42fr) 1fr;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.product-specs dt,
.spec-list dt {
  color: #445367;
  font-weight: 720;
}

.product-specs dd,
.spec-list dd {
  margin: 0;
  color: var(--muted);
}

.product-disclaimer {
  margin: 0 0 16px;
  color: #79531a;
  font-size: 0.88rem;
}

.product-card .button {
  width: 100%;
  margin-top: auto;
}

.inline-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 30px;
  padding: 24px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.inline-cta h3 {
  margin-bottom: 6px;
}

.inline-cta p {
  margin: 0;
  color: var(--muted);
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1fr);
  gap: 54px;
  align-items: center;
}

.two-column > div > p {
  color: var(--muted);
}

.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 22px 0 0;
  list-style: none;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  color: #304156;
}

.two-col-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.alert {
  margin-top: 24px;
  padding: 18px 20px;
  color: #5a3e04;
  background: #fff5d9;
  border: 1px solid #f2d48a;
  border-radius: 8px;
}

.visual-panel {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.visual-panel img {
  width: 100%;
  min-height: 360px;
  object-fit: cover;
}

.process-flow {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 48px 0 0;
  counter-reset: process;
  list-style: none;
}

.process-flow li {
  position: relative;
  min-height: 136px;
  padding: 58px 14px 16px;
  color: #344254;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.process-flow li::before {
  counter-increment: process;
  content: counter(process);
  position: absolute;
  top: 16px;
  left: 14px;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  color: var(--white);
  background: var(--teal);
  border-radius: 50%;
  font-weight: 760;
}

.download-panel,
.request-documents {
  padding: 26px;
  box-shadow: 0 12px 28px rgba(22, 33, 51, 0.06);
}

.request-documents {
  margin-top: 22px;
}

.request-documents p {
  margin: 8px 0 0;
  color: var(--muted);
}

.document-matrix {
  overflow-x: auto;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 28px rgba(22, 33, 51, 0.06);
}

.document-matrix table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
}

.document-matrix th,
.document-matrix td {
  padding: 15px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.document-matrix thead th {
  color: var(--white);
  background: var(--navy);
  font-size: 0.9rem;
}

.document-matrix tbody th {
  color: var(--ink);
  font-weight: 760;
}

.document-matrix td {
  color: var(--muted);
}

.document-matrix tbody tr:last-child th,
.document-matrix tbody tr:last-child td {
  border-bottom: 0;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0 22px;
}

.download-grid a {
  min-height: 48px;
  padding: 12px;
  color: var(--navy);
  text-decoration: none;
  background: #f8fbfd;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.download-grid a:hover,
.download-grid a:focus-visible {
  color: var(--blue);
  border-color: var(--blue);
}

.spec-list {
  margin: 24px 0;
}

.spec-list div {
  grid-template-columns: minmax(140px, 0.4fr) 1fr;
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.faq-list details {
  padding: 0;
}

.faq-list summary {
  min-height: 64px;
  padding: 20px 22px;
  color: var(--ink);
  font-weight: 760;
  cursor: pointer;
}

.faq-list details[open] summary {
  border-bottom: 1px solid var(--line);
}

.faq-list p {
  margin: 0;
  padding: 18px 22px 22px;
  color: var(--muted);
}

.contact-section {
  background: linear-gradient(180deg, var(--white), #edf5f7);
}

.contact-layout {
  align-items: start;
}

.contact-card {
  margin-top: 28px;
  padding: 22px;
}

.contact-card p {
  margin: 6px 0;
}

.inquiry-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.form-row,
.form-row-full {
  min-width: 0;
}

.form-row-full {
  grid-column: 1 / -1;
}

label {
  display: block;
  margin-bottom: 7px;
  color: #314257;
  font-weight: 720;
}

input,
select,
textarea {
  width: 100%;
  color: var(--ink);
  background: var(--white);
  border: 1px solid #cbd8e5;
  border-radius: 8px;
}

input,
select {
  min-height: 46px;
  padding: 10px 12px;
}

textarea {
  min-height: 132px;
  padding: 12px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  outline: 3px solid rgba(36, 111, 168, 0.18);
  border-color: var(--blue);
}

.field-error {
  min-height: 20px;
  margin: 5px 0 0;
  color: #a43420;
  font-size: 0.88rem;
}

.consent-row {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 10px;
  align-items: start;
}

.consent-row input {
  width: 18px;
  min-height: 18px;
  margin-top: 3px;
}

.consent-row label {
  margin: 0;
  color: var(--muted);
  font-weight: 560;
}

.form-status {
  display: none;
  margin: 0;
  padding: 14px 16px;
  color: #174b35;
  background: #e7f4ec;
  border: 1px solid #a8d4ba;
  border-radius: 8px;
}

.form-status.is-visible {
  display: block;
}

.privacy-note {
  padding: 34px 0;
  color: #4c5a69;
  background: #eef3f6;
  border-top: 1px solid var(--line);
}

.privacy-note h2 {
  margin-bottom: 8px;
  font-size: 1.2rem;
}

.privacy-note p {
  max-width: 980px;
  margin: 0;
}

.site-footer {
  padding: 44px 0;
  color: #d6e0ea;
  background: #112335;
}

.site-footer a {
  color: #d6e0ea;
}

.site-footer h2 {
  margin-bottom: 12px;
  color: var(--white);
  font-size: 1rem;
}

.site-footer p {
  margin: 7px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 34px;
}

.footer-brand {
  color: var(--white);
}

.site-footer .brand-mark {
  background: var(--blue);
}

.site-footer div:last-child a {
  display: block;
  margin: 8px 0;
  text-decoration: none;
}

@media (max-width: 1040px) {
  .site-header {
    grid-template-columns: auto auto;
    justify-content: space-between;
    padding: 0 20px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: 76px 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 20px 24px;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 34px rgba(22, 33, 51, 0.12);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }

  .header-cta {
    display: none;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 1.9rem;
  }

  .card-grid.four,
  .product-grid,
  .card-grid.three,
  .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .container,
  .hero-inner {
    width: min(100% - 28px, 1160px);
  }

  .hero {
    min-height: 620px;
    background-image:
      linear-gradient(180deg, rgba(10, 28, 48, 0.9), rgba(10, 28, 48, 0.58)),
      url("assets/hero-portable-ac.jpg");
  }

  .hero-inner {
    padding: 56px 0;
  }

  h1 {
    font-size: 2.42rem;
  }

  h2 {
    font-size: 1.72rem;
  }

  .hero-copy {
    font-size: 1rem;
  }

  .hero-actions,
  .section-heading.split,
  .inline-cta {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .button,
  .section-heading .button,
  .inline-cta .button {
    width: 100%;
  }

  .trust-points {
    gap: 10px;
  }

  .trust-points li {
    width: 100%;
  }

  .section {
    padding: 62px 0;
  }

  .section-compact {
    padding-top: 44px;
  }

  .card-grid.four,
  .product-grid,
  .card-grid.three,
  .faq-list,
  .two-column,
  .two-col-list,
  .download-grid,
  .footer-grid,
  .inquiry-form {
    grid-template-columns: 1fr;
  }

  .two-column {
    gap: 30px;
  }

  .reverse-on-mobile .visual-panel {
    order: 2;
  }

  .process-flow {
    grid-template-columns: 1fr;
  }

  .process-flow li {
    min-height: auto;
  }

  .product-specs div,
  .spec-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .visual-panel img {
    min-height: 250px;
  }

  .inquiry-form {
    padding: 22px;
  }
}

@media (max-width: 430px) {
  .site-header {
    min-height: 68px;
    padding: 0 14px;
  }

  .site-nav {
    inset: 68px 0 auto 0;
  }

  .brand span:last-child {
    max-width: 190px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  h1 {
    font-size: 2.08rem;
  }

  .button {
    width: 100%;
  }
}