/* Lightweight responsive styles for a B2B aluminum windows and doors website.
   Replace image URLs in each HTML page with optimized WebP/AVIF product photos. */

:root {
  --ink: #17232b;
  --muted: #5d6b73;
  --paper: #f5f6f4;
  --white: #fff;
  --line: #dce2e2;
  --accent: #d86b35;
  --accent-dark: #b95121;
  --navy: #10232e;
  --radius: 12px;
  --content: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font: 16px/1.6 Arial, Helvetica, sans-serif;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: min(var(--content), calc(100% - 36px));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: #fff;
  padding: 10px;
  z-index: 99;
}

.skip-link:focus {
  left: 10px;
}

/* Header and navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .97);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: .03em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--accent);
  color: #fff;
  font-size: 20px;
  border-radius: 7px;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: .14em;
  font-weight: 700;
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav a {
  font-size: 14px;
  font-weight: 700;
  color: #34444d;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--accent-dark);
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 11px;
}

/* Buttons */
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  min-height: 46px;
  padding: 12px 19px;
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  border-radius: 7px;
  font-weight: 800;
  cursor: pointer;
  transition: background .2s ease;
}

.btn:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: #9ba8ad;
}

.btn-outline:hover {
  color: #fff;
}

.btn-small {
  min-height: 38px;
  padding: 8px 13px;
  font-size: 13px;
}

/* Typography */
.eyebrow {
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .16em;
}

h1,
h2,
h3 {
  line-height: 1.13;
  letter-spacing: -.025em;
  margin: 0 0 18px;
}

h1 {
  font-size: clamp(2.4rem, 7vw, 4.8rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
}

h3 {
  font-size: 1.25rem;
}

p {
  margin: 0 0 16px;
  color: var(--muted);
}

/* Homepage hero */
.hero {
  background: var(--navy);
  color: #fff;
  padding: 64px 0;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 42px;
  align-items: center;
}

.hero h1 {
  max-width: 760px;
}

.hero p {
  max-width: 610px;
  color: #c5d0d4;
  font-size: 1.08rem;
}

.hero .eyebrow {
  color: #f2a27a;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 25px;
}

.hero .btn-outline {
  color: #fff;
  border-color: #657982;
}

.hero-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  background: #d7dfe0;
}

/* General sections and content grids */
.section {
  padding: 70px 0;
}

.section-muted {
  background: var(--paper);
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 28px;
}

.section-head > div {
  max-width: 680px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.card-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #e1e7e7;
}

.card-body {
  padding: 21px;
}

.card-body p {
  font-size: 14px;
}

.text-link {
  color: var(--accent-dark);
  font-weight: 800;
  font-size: 14px;
}

/* Specification highlights */
.spec-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 25px;
}

.spec {
  border-left: 3px solid var(--accent);
  padding: 8px 14px;
  background: rgba(255, 255, 255, .06);
}

.spec strong {
  display: block;
  color: #fff;
  font-size: 15px;
}

.spec span {
  display: block;
  color: #c5d0d4;
  font-size: 12px;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 22px 0;
}

.feature-list li {
  padding: 10px 0 10px 27px;
  position: relative;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-dark);
  font-weight: 900;
}

/* Inner page title area */
.page-hero {
  padding: 56px 0;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  font-size: clamp(2.3rem, 6vw, 3.7rem);
}

.page-hero p {
  max-width: 760px;
  font-size: 1.05rem;
}

.breadcrumb {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 16px;
}

/* Call-to-action band */
.cta-band {
  background: var(--accent);
  color: #fff;
  padding: 42px 0;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
}

.cta-band h2 {
  margin-bottom: 8px;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
}

.cta-band p {
  color: #fff0e9;
  margin: 0;
}

.cta-band .btn {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
}

/* Contact form */
.form-wrap {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 42px;
  align-items: start;
}

.form-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 25px;
  background: #fff;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.field-full {
  grid-column: 1 / -1;
}

label {
  font-size: 13px;
  font-weight: 800;
}

input,
textarea,
select {
  width: 100%;
  padding: 12px 13px;
  border: 1px solid #cbd4d6;
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
}

textarea {
  min-height: 135px;
  resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid #e8a17e;
  border-color: var(--accent);
}

.form-status {
  margin-top: 14px;
  font-weight: 700;
  color: #17633b;
}

/* FAQ */
.faq-list {
  max-width: 850px;
}

details {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

summary {
  font-weight: 800;
  cursor: pointer;
}

details p {
  margin: 12px 0 0;
}

/* Footer */
.site-footer {
  background: #0b1a22;
  color: #fff;
  padding: 48px 0 22px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 30px;
}

.site-footer p,
.site-footer a {
  color: #b8c5ca;
  font-size: 14px;
}

.site-footer h3 {
  font-size: 14px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.footer-bottom {
  border-top: 1px solid #2b3d46;
  margin-top: 30px;
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  gap: 15px;
  flex-wrap: wrap;
}

/* Fixed WhatsApp contact button */
.whatsapp-float {
  position: fixed;
  z-index: 30;
  right: 18px;
  bottom: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #168b58;
  color: #fff;
  padding: 13px 17px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 8px 24px #0002;
}

.note {
  font-size: 12px;
}

.empty-image {
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #d9e0e0, #aebfc2);
  color: #41535a;
  font-weight: 800;
  text-align: center;
}

/* Tablet */
@media (max-width: 900px) {
  .nav {
    gap: 12px;
  }

  .nav a {
    font-size: 12px;
  }

  .header-cta {
    display: none;
  }

  .hero-grid,
  .form-wrap {
    grid-template-columns: 1fr;
  }

  .hero-image {
    max-height: 420px;
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile */
@media (max-width: 680px) {
  .container {
    width: min(var(--content), calc(100% - 28px));
  }

  .header-inner {
    min-height: 64px;
    flex-wrap: wrap;
    padding: 10px 0;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding: 10px 0 5px;
    gap: 0;
  }

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

  .nav a {
    font-size: 15px;
    padding: 10px 4px;
    border-top: 1px solid var(--line);
  }

  .hero {
    padding: 48px 0;
  }

  .hero-grid {
    gap: 28px;
  }

  .section {
    padding: 52px 0;
  }

  .section-head,
  .cta-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .grid-3,
  .grid-2,
  .footer-grid,
  .spec-list,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .field-full {
    grid-column: auto;
  }

  .form-card {
    padding: 18px;
  }

  .whatsapp-float {
    right: 12px;
    bottom: 12px;
    padding: 12px 14px;
  }
}

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}



.brand-logo {
  display: block;
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
}

@media (max-width: 600px) {
  .brand-logo {
    width: 40px;
    height: 40px;
  }
}