/* Central Stylesheet for Precision Air Balancers L.L.C. */

:root {
  --blnc-primary: #334155;
  --blnc-primary-rgb: 51, 65, 85;
  --blnc-accent: #e65c00;
  --blnc-accent-hover: #cc5200;
  --blnc-bg-main: #fafaf9;
  --blnc-bg-card: #ffffff;
  --blnc-bg-alt: #f1f5f9;
  --blnc-text-dark: #0f172a;
  --blnc-text-light: #f8fafc;
  --blnc-text-muted: #64748b;
  --blnc-border: #cbd5e1;
  --blnc-shadow: 0 6px 12px -2px rgba(50, 50, 93, 0.12), 0 3px 7px -3px rgba(0, 0, 0, 0.15);
  --blnc-shadow-hover: 0 13px 27px -5px rgba(50, 50, 93, 0.18), 0 8px 16px -8px rgba(0, 0, 0, 0.22);
  --blnc-radius: 8px;
  --blnc-container-max: 1200px;
  --blnc-font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --blnc-font-mono: "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--blnc-font-family);
  background-color: var(--blnc-bg-main);
  color: var(--blnc-text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--blnc-primary);
  margin-top: 0;
  font-weight: 700;
  line-height: 1.25;
}

p {
  margin-top: 0;
  margin-bottom: 1.5rem;
}

a {
  color: var(--blnc-accent);
  text-decoration: none;
  transition: color 0.25s ease;
}

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

/* Typography & Utilities */
.blnc-container {
  width: 100%;
  max-width: var(--blnc-container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.blnc-eyebrow {
  display: inline-block;
  font-family: var(--blnc-font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--blnc-accent);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.blnc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--blnc-radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  text-align: center;
}

.blnc-btn--primary {
  background-color: var(--blnc-accent);
  color: var(--blnc-text-light);
}

.blnc-btn--primary:hover {
  background-color: var(--blnc-accent-hover);
  color: var(--blnc-text-light);
  transform: translateY(-2px);
}

.blnc-btn--secondary {
  background-color: var(--blnc-primary);
  color: var(--blnc-text-light);
}

.blnc-btn--secondary:hover {
  background-color: #475569;
  color: var(--blnc-text-light);
  transform: translateY(-2px);
}

.blnc-btn--outline {
  background-color: transparent;
  border-color: var(--blnc-primary);
  color: var(--blnc-primary);
}

.blnc-btn--outline:hover {
  background-color: var(--blnc-primary);
  color: var(--blnc-text-light);
  transform: translateY(-2px);
}

.blnc-btn--block {
  display: flex;
  width: 100%;
}

/* Accessibility */
:focus-visible {
  outline: 3px solid var(--blnc-accent);
  outline-offset: 3px;
}

/* Site Header & Navigation */
.blnc-header {
  background-color: var(--blnc-bg-card);
  border-bottom: 1px solid var(--blnc-border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.blnc-header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.blnc-logo {
  display: flex;
  align-items: center;
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--blnc-primary);
}

.blnc-logo__mark {
  background-color: var(--blnc-accent);
  color: var(--blnc-text-light);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  margin-right: 12px;
  font-family: var(--blnc-font-mono);
  font-weight: 700;
}

.blnc-logo__text {
  letter-spacing: -0.02em;
}

.blnc-nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.blnc-nav__toggle span {
  display: block;
  width: 24px;
  height: 3px;
  background-color: var(--blnc-primary);
  transition: all 0.3s ease;
}

.blnc-nav__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
  gap: 28px;
}

.blnc-nav__link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--blnc-text-dark);
  padding: 8px 4px;
  border-bottom: 2px solid transparent;
}

.blnc-nav__link:hover, .blnc-nav__link.is-active {
  color: var(--blnc-accent);
  border-bottom-color: var(--blnc-accent);
}

.blnc-nav__link--cta {
  background-color: var(--blnc-accent);
  color: var(--blnc-text-light) !important;
  border-radius: var(--blnc-radius);
  padding: 10px 20px;
  border: none;
}

.blnc-nav__link--cta:hover {
  background-color: var(--blnc-accent-hover);
  transform: translateY(-1px);
}

/* Hero Section (Form-Right Layout) */
.blnc-hero {
  background-color: var(--blnc-primary);
  color: var(--blnc-text-light);
  padding: 80px 0;
  overflow: hidden;
  position: relative;
}

.blnc-hero__inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.blnc-hero__content {
  max-width: 650px;
}

.blnc-hero h1 {
  color: var(--blnc-text-light);
  font-size: 3rem;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.blnc-hero__lead {
  font-size: 1.2rem;
  line-height: 1.6;
  color: #cbd5e1;
  margin-bottom: 2rem;
}

.blnc-hero__stats {
  display: flex;
  gap: 40px;
  margin-top: 3rem;
  padding: 0;
  list-style: none;
}

.blnc-hero__stats li {
  display: flex;
  flex-direction: column;
}

.blnc-hero__stats strong {
  font-size: 2.2rem;
  color: var(--blnc-accent);
  font-weight: 800;
  line-height: 1;
}

.blnc-hero__stats span {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #94a3b8;
  margin-top: 4px;
}

.blnc-hero__form-container {
  background-color: var(--blnc-bg-card);
  padding: 32px;
  border-radius: 12px;
  color: var(--blnc-text-dark);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
}

.blnc-hero__form-container h3 {
  margin-bottom: 1.5rem;
  font-size: 1.35rem;
  border-bottom: 2px solid var(--blnc-accent);
  padding-bottom: 8px;
}

/* Sections & Layout Blocks */
.blnc-section {
  padding: 100px 0;
}

.blnc-section--alt {
  background-color: var(--blnc-bg-alt);
}

.blnc-section__head {
  max-width: 800px;
  margin-bottom: 4rem;
}

.blnc-section__head h2 {
  font-size: 2.25rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.blnc-section__head p {
  font-size: 1.1rem;
  color: var(--blnc-text-muted);
}

/* Interactive Cards Grid */
.blnc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.blnc-card {
  background-color: var(--blnc-bg-card);
  border-radius: var(--blnc-radius);
  border: 1px solid var(--blnc-border);
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  display: flex;
  flex-direction: column;
}

.blnc-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--blnc-shadow-hover);
  border-color: var(--blnc-accent);
}

.blnc-card__media {
  margin: 0;
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: #cbd5e1;
}

.blnc-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.blnc-card:hover .blnc-card__media img {
  transform: scale(1.05);
}

.blnc-card__badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background-color: var(--blnc-primary);
  color: var(--blnc-text-light);
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blnc-card__body {
  padding: 28px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.blnc-card__body h3 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.blnc-card__body p {
  color: var(--blnc-text-muted);
  font-size: 0.95rem;
  flex-grow: 1;
  margin-bottom: 1.5rem;
}

.blnc-card__link {
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  color: var(--blnc-accent);
}

.blnc-card__link::after {
  content: " →";
  transition: transform 0.2s ease;
}

.blnc-card:hover .blnc-card__link::after {
  transform: translateX(4px);
}

/* Two Column Layout (Text + Sidebar Callout) */
.blnc-twocol {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: start;
}

.blnc-twocol__text p {
  font-size: 1.05rem;
  color: #334155;
  margin-bottom: 1.5rem;
}

.blnc-bullets {
  list-style: none;
  padding: 0;
  margin: 2rem 0;
}

.blnc-bullets li {
  position: relative;
  padding-left: 32px;
  margin-bottom: 1rem;
  font-size: 1rem;
  font-weight: 500;
}

.blnc-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  background-color: var(--blnc-accent);
  border-radius: 50%;
  opacity: 0.85;
}

.blnc-callout {
  background-color: var(--blnc-bg-card);
  border: 2px solid var(--blnc-primary);
  border-top: 6px solid var(--blnc-accent);
  padding: 40px;
  border-radius: var(--blnc-radius);
  box-shadow: var(--blnc-shadow);
}

.blnc-callout h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.blnc-callout p {
  font-size: 0.95rem;
  color: var(--blnc-text-muted);
  margin-bottom: 1.5rem;
}

/* Standard Forms */
.blnc-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.blnc-form__group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.blnc-form__label {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--blnc-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blnc-form__input, .blnc-form__select, .blnc-form__textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--blnc-border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.95rem;
  background-color: #ffffff;
  transition: all 0.25s ease;
}

.blnc-form__input:focus, .blnc-form__select:focus, .blnc-form__textarea:focus {
  outline: none;
  border-color: var(--blnc-accent);
  box-shadow: 0 0 0 3px rgba(230, 92, 0, 0.15);
}

.blnc-form__textarea {
  resize: vertical;
  min-height: 120px;
}

.blnc-form__consent {
  font-size: 0.8rem;
  color: var(--blnc-text-muted);
  display: flex;
  gap: 8px;
  align-items: flex-start;
  cursor: pointer;
}

.blnc-form__consent input {
  margin-top: 3px;
}

/* Tables (Pricing / Comparison) */
.blnc-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--blnc-border);
  border-radius: var(--blnc-radius);
  margin: 3rem 0;
  background-color: var(--blnc-bg-card);
}

.blnc-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.blnc-table th, .blnc-table td {
  padding: 16px 24px;
  border-bottom: 1px solid var(--blnc-border);
}

.blnc-table th {
  background-color: var(--blnc-bg-alt);
  color: var(--blnc-primary);
  font-weight: 700;
}

.blnc-table tr:last-child td {
  border-bottom: none;
}

.blnc-table tr:hover td {
  background-color: #faf8f5;
}

/* Accordion (FAQ Page) */
.blnc-accordion {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.blnc-accordion__item {
  background-color: var(--blnc-bg-card);
  border: 1px solid var(--blnc-border);
  border-radius: var(--blnc-radius);
  overflow: hidden;
}

.blnc-accordion__trigger {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--blnc-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease;
}

.blnc-accordion__trigger:hover {
  background-color: var(--blnc-bg-alt);
}

.blnc-accordion__trigger::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--blnc-accent);
  transition: transform 0.2s ease;
}

.blnc-accordion__item.is-open .blnc-accordion__trigger::after {
  transform: rotate(45deg);
}

.blnc-accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.blnc-accordion__item.is-open .blnc-accordion__content {
  max-height: 500px;
}

.blnc-accordion__body {
  padding: 0 24px 20px;
  color: var(--blnc-text-muted);
  font-size: 0.95rem;
}

/* Steps Block */
.blnc-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
}

.blnc-step {
  background-color: var(--blnc-bg-card);
  padding: 40px;
  border-radius: var(--blnc-radius);
  border: 1px solid var(--blnc-border);
  position: relative;
}

.blnc-step__num {
  font-family: var(--blnc-font-mono);
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(230, 92, 0, 0.15);
  position: absolute;
  top: 16px;
  right: 24px;
  line-height: 1;
}

.blnc-step h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

.blnc-step p {
  color: var(--blnc-text-muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Footer styling */
.blnc-footer {
  background-color: var(--blnc-primary);
  color: var(--blnc-text-light);
  padding: 80px 0 0;
  border-top: 4px solid var(--blnc-accent);
}

.blnc-footer__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1.2fr;
  gap: 48px;
  margin-bottom: 60px;
}

.blnc-footer__col h4 {
  color: var(--blnc-text-light);
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--blnc-font-mono);
}

.blnc-footer__col p {
  color: #94a3b8;
  font-size: 0.9rem;
}

.blnc-footer__col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.blnc-footer__col a {
  color: #cbd5e1;
  font-size: 0.9rem;
}

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

.blnc-footer__logo {
  display: flex;
  align-items: center;
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--blnc-text-light);
  margin-bottom: 1.2rem;
}

.blnc-footer__logo .blnc-logo__mark {
  background-color: var(--blnc-accent);
}

.blnc-footer__address {
  font-style: normal;
  color: #94a3b8;
  font-size: 0.9rem;
  line-height: 1.7;
}

.blnc-footer__address a {
  color: var(--blnc-text-light);
}

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

.blnc-footer__bottom {
  border-top: 1px solid #475569;
  padding: 30px 0;
  font-size: 0.85rem;
  color: #94a3b8;
}

.blnc-footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Responsive Breakpoints (1000px, 750px, 500px) */

@media (max-width: 1000px) {
  .blnc-hero__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .blnc-hero__content {
    max-width: 100%;
    text-align: center;
  }
  .blnc-hero__stats {
    justify-content: center;
  }
  .blnc-twocol {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .blnc-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 750px) {
  .blnc-header__inner {
    height: 70px;
  }
  .blnc-nav__toggle {
    display: flex;
  }
  .blnc-nav__list {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--blnc-bg-card);
    border-bottom: 1px solid var(--blnc-border);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  }
  .blnc-nav__list.is-open {
    display: flex;
  }
  .blnc-nav__link {
    width: 100%;
    text-align: center;
    padding: 10px 0;
  }
  .blnc-nav__link--cta {
    width: 100%;
    justify-content: center;
  }
  .blnc-section {
    padding: 60px 0;
  }
  .blnc-section__head {
    margin-bottom: 2.5rem;
  }
  .blnc-section__head h2 {
    font-size: 1.85rem;
  }
  .blnc-hero h1 {
    font-size: 2.25rem;
  }
}

@media (max-width: 500px) {
  .blnc-hero {
    padding: 40px 0;
  }
  .blnc-hero__form-container {
    padding: 20px;
  }
  .blnc-footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .blnc-footer__bottom-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
  .blnc-hero__stats {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }
}

/* Reduced Motion Override */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0s !important;
    scroll-behavior: auto !important;
  }
}