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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #f97316;
  --foreground: #0f172a;
  --muted: #475569;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --border: rgba(15, 23, 42, 0.12);
  --radius: 12px;
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.12);
  --transition: 200ms ease;
  --header-height: 4.5rem;
  --font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
  font-size: 100%;
  line-height: 1.5;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-family);
  font-size: 1rem;
  color: var(--foreground);
  background: var(--surface-alt);
  padding-top: var(--header-height);
}

body.menu-open {
  overflow: hidden;
}

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

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

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

.container {
  width: min(72rem, 92vw);
  margin: 0 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition),
    background var(--transition), color var(--transition),
    border var(--transition);
  font-size: 0.95rem;
  line-height: 1.2;
  min-height: 2.75rem;
}

.btn:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.35);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 15px 30px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 18px 32px rgba(37, 99, 235, 0.3);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.18);
}

.btn-large {
  padding: 0.9rem 2.2rem;
  font-size: 1rem;
}

.btn-wide {
  width: 100%;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  transition: background var(--transition), box-shadow var(--transition),
    color var(--transition);
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
}

.site-header.is-scrolled .branding__title,
.site-header.is-scrolled .branding__subtitle,
.site-header.is-scrolled .nav__list a {
  color: var(--foreground);
}

.header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.branding {
  display: flex;
  flex-direction: column;
}

.branding__title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #ffffff;
}

.branding__subtitle {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.7);
}

.nav {
  display: none;
  margin-left: auto;
}

.nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0;
  margin: 0;
}

.nav__list a {
  display: inline-block;
  padding: 0.5rem 0.75rem;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.nav__list a:hover,
.nav__list a:focus-visible {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.site-header.is-scrolled .nav__list a:hover,
.site-header.is-scrolled .nav__list a:focus-visible {
  background: rgba(37, 99, 235, 0.1);
}

.header-cta {
  display: none;
}

.menu-toggle {
  display: inline-flex;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: rgba(15, 23, 42, 0.35);
  position: relative;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  transition: background var(--transition), border-color var(--transition);
  margin-left: auto;
}

.menu-toggle:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.35);
  outline-offset: 2px;
}

.site-header.is-scrolled .menu-toggle {
  border-color: rgba(15, 23, 42, 0.18);
  background: rgba(255, 255, 255, 0.9);
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  background: #ffffff;
  display: block;
  border-radius: 999px;
  position: absolute;
  transition: transform var(--transition), opacity var(--transition),
    background var(--transition);
}

.site-header.is-scrolled .menu-toggle span {
  background: var(--foreground);
}

.menu-toggle span:nth-child(1) {
  transform: translateY(-6px);
}

.menu-toggle span:nth-child(2) {
  transform: translateY(0);
}

.menu-toggle span:nth-child(3) {
  transform: translateY(6px);
}

.mobile-menu {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 998;
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-menu__content {
  width: min(26.25rem, 85vw);
  color: #ffffff;
  text-align: center;
  position: relative;
}

.mobile-menu__content ul {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem 0;
  display: grid;
  gap: 1rem;
  font-size: 1.2rem;
  font-weight: 600;
}

.mobile-menu__content a:hover,
.mobile-menu__content a:focus-visible {
  color: var(--accent);
}

.menu-close {
  position: absolute;
  top: -3rem;
  right: 0;
  background: none;
  border: none;
  font-size: 2rem;
  color: #ffffff;
  cursor: pointer;
  line-height: 1;
}

.hero {
  position: relative;
  padding: clamp(3.5rem, 8vw, 5.5rem) 0;
  display: flex;
  align-items: center;
  overflow: hidden;
  min-height: calc(100vh - 6rem);
}

.hero__background {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero__background img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(15, 23, 42, 0.82), rgba(15, 23, 42, 0.7));
  z-index: 1;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  display: grid;
  gap: clamp(2rem, 6vw, 3.5rem);
  color: #ffffff;
}

.hero__text .eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 1rem;
}

.hero__text h1 {
  margin: 0 0 1.5rem;
  font-size: clamp(2.1rem, 5vw + 1rem, 3.6rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero__text p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.7;
  margin: 0 0 1.75rem;
}

.hero__actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: stretch;
  margin-bottom: 2rem;
}

.hero__actions .btn {
  width: 100%;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
}

.hero__stats div {
  background: rgba(15, 23, 42, 0.4);
  border-radius: var(--radius);
  padding: 1.2rem;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
}

.hero__stats dt {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
  overflow-wrap: anywhere;
  word-break: break-word;
  line-height: 1.4;
  margin: 0;
}

.hero__stats dd {
  margin: 0.5rem 0 0;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}

.hero__slider {
  width: min(32rem, 100%);
  margin: 0 auto;
}

.before-after {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  aspect-ratio: 16 / 9;
  background: #0f172a;
  isolation: isolate;
  --position: 50%;
  width: 100%;
}

.before-after__before {
  position: absolute;
  inset: 0;
  width: var(--position);
  overflow: hidden;
  border-right: 2px solid rgba(255, 255, 255, 0.8);
}

.before-after__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.before-after__image--after {
  position: absolute;
  inset: 0;
}

.before-after__label {
  position: absolute;
  top: 1rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(15, 23, 42, 0.65);
  color: #ffffff;
}

.before-after__label--before {
  left: 1rem;
}

.before-after__label--after {
  right: 1rem;
}

.before-after__category {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  background: var(--primary);
  color: #ffffff;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.85rem;
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.25);
}

.before-after__divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--position);
  width: 3px;
  background: rgba(255, 255, 255, 0.85);
  cursor: col-resize;
  transform: translateX(-1.5px);
  display: flex;
  align-items: center;
  justify-content: center;
  outline: none;
}

.before-after__divider:focus-visible .before-after__thumb {
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.35);
}

.before-after__thumb {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid var(--primary);
  display: grid;
  place-items: center;
  color: var(--primary);
  font-weight: 700;
  box-shadow: 0 12px 25px rgba(15, 23, 42, 0.2);
  position: relative;
}

.before-after__thumb::before,
.before-after__thumb::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border-right: 3px solid var(--primary);
  border-bottom: 3px solid var(--primary);
}

.before-after__thumb::before {
  transform: translateX(-10px) rotate(135deg);
  left: 14px;
}

.before-after__thumb::after {
  transform: translateX(10px) rotate(-45deg);
  right: 14px;
}

.section-header {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto 2.5rem;
}

.section-header h2 {
  font-size: clamp(2rem, 2.5vw + 1rem, 3rem);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.section-header p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.services,
.gallery,
.calculator,
.contact {
  padding: clamp(3.5rem, 8vw, 5rem) 0;
}

.service-grid {
  display: grid;
  gap: 1.8rem;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.service-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid var(--border);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 50px rgba(15, 23, 42, 0.12);
}

.service-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 1.6rem;
  background: rgba(37, 99, 235, 0.1);
  margin-bottom: 1.5rem;
}

.service-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
}

.service-card p {
  color: var(--muted);
  line-height: 1.7;
  margin: 0;
}

.gallery {
  background: var(--surface);
}

.gallery-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(16.25rem, 1fr));
}

.calculator-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.8rem, 4vw, 2.5rem);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  display: grid;
  gap: 1.5rem;
}

.calculator-form fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 0;
}

.calculator-form legend {
  padding: 0 0.5rem;
  font-weight: 600;
}

.calculator-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem 1.2rem;
  margin-top: 1rem;
}

.calculator-grid label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  cursor: pointer;
}

.calculator-input {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.calculator-input input,
.calculator-input select,
.contact-form input,
.contact-form select,
.contact-form textarea,
.newsletter input {
  padding: 0.8rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  font: inherit;
  background: var(--surface-alt);
  transition: border var(--transition), box-shadow var(--transition);
}

.calculator-input input:focus-visible,
.calculator-input select:focus-visible,
.contact-form input:focus-visible,
.contact-form select:focus-visible,
.contact-form textarea:focus-visible,
.newsletter input:focus-visible {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

.form-feedback {
  min-height: 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0;
}

.form-feedback.is-error {
  color: #dc2626;
}

.form-feedback.is-success {
  color: var(--primary);
  font-weight: 600;
}

.calculator-result {
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: var(--radius);
  padding: 1.8rem;
  background: rgba(37, 99, 235, 0.05);
  text-align: center;
}

.calculator-result__title {
  margin: 0 0 0.35rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-size: 0.9rem;
}

.calculator-result__value {
  margin: 0 0 0.75rem;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--primary);
}

.calculator-result__note {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.contact {
  background: var(--surface);
}

.contact__inner {
  display: grid;
  gap: 2.5rem;
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.contact-form {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.8rem, 4vw, 2.5rem);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  display: grid;
  gap: 1.2rem;
}

.form-group {
  display: grid;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 600;
}

.contact-form textarea {
  resize: vertical;
  min-height: 140px;
}

.contact-info {
  display: grid;
  gap: 1.2rem;
}

.contact-info article {
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.contact-info h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.contact-info p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.contact-info a {
  color: var(--primary);
  font-weight: 600;
}

.contact-highlight {
  background: var(--primary);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.35);
}

.contact-highlight p {
  color: rgba(255, 255, 255, 0.9);
}

.site-footer {
  background: #0b1220;
  color: rgba(255, 255, 255, 0.8);
  padding: clamp(3.5rem, 8vw, 4rem) 0 2.5rem;
}

.footer__inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13.75rem, 1fr));
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer__col h3 {
  margin-top: 0;
  color: #ffffff;
  font-size: 1.1rem;
}

.footer__col p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

.footer__col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.4rem;
  color: rgba(255, 255, 255, 0.7);
}

.footer__col a:hover {
  color: var(--accent);
}

.social-links {
  display: flex;
  gap: 0.75rem;
  font-weight: 600;
}

.newsletter {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
  align-items: center;
}

.newsletter input {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

.newsletter input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.newsletter button {
  width: 100%;
}

.footer__bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  justify-content: flex-start;
  align-items: flex-start;
  font-size: 0.9rem;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ≥48rem (768px) — Tablets & small laptops */
@media (min-width: 48rem) {
  :root {
    --header-height: 4.75rem;
  }

  body {
    font-size: 1.05rem;
  }

  .header-inner {
    gap: 1.5rem;
  }

  .branding__title {
    font-size: 1.15rem;
  }

  .branding__subtitle {
    font-size: 0.8rem;
  }

  .hero {
    padding: clamp(4rem, 6vw, 6rem) 0;
    min-height: 80vh;
  }

  .hero__content {
    gap: clamp(2.5rem, 5vw, 3.8rem);
  }

  .hero__actions {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
  }

  .hero__actions .btn {
    width: auto;
    min-width: 12rem;
  }

  .hero__stats {
    gap: 1.5rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .hero__slider {
    max-width: 36rem;
  }

  .service-grid {
    gap: 2rem;
  }

  .gallery-grid {
    gap: 2rem;
  }

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

  .contact__inner {
    gap: 3rem;
  }

  .contact__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  }

  .newsletter {
    grid-template-columns: 1fr auto;
  }

  .newsletter button {
    width: auto;
  }

  .footer__bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-around;
  }

  .footer__links {
    gap: 1.5rem;
  }
}

/* ≥64rem (1024px) — Small desktops */
@media (min-width: 64rem) {
  :root {
    --header-height: 5rem;
  }

  body {
    padding-top: var(--header-height);
    font-size: 1.0625rem;
  }

  .nav {
    display: block;
  }

  .nav__list {
    flex-direction: row;
    align-items: center;
    gap: 1rem;
  }

  .header-cta {
    display: inline-flex;
    margin-left: 1rem;
  }

  .menu-toggle {
    display: none;
  }

  .hero {
    min-height: 90vh;
  }

  .hero__content {
    grid-template-columns: repeat(12, 1fr);
    align-items: center;
  }

  .hero__text {
    grid-column: span 6;
  }

  .hero__slider {
    grid-column: span 6;
    width: 100%;
  }

  .hero__text p {
    font-size: 1.1rem;
    max-width: 34rem;
  }

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

  .contact__grid {
    gap: 2.5rem;
  }
}

/* ≥80rem (1280px) — Wide screens */
@media (min-width: 80rem) {
  .container {
    width: min(75rem, 90vw);
  }

  .hero__text h1 {
    font-size: clamp(3rem, 2.5vw + 1rem, 4rem);
  }

  .hero__stats dd {
    font-size: 2.2rem;
  }

  .service-card {
    padding: 2.25rem;
  }
}