/* ==========================================================
   Bopai Export Theme — Main Stylesheet
   Premium responsive design for industrial water quality sensors
   ========================================================== */

:root {
  --bopai-color-primary: #0f4c81;
  --bopai-color-primary-dark: #08365c;
  --bopai-color-primary-light: #1e6ba8;
  --bopai-color-accent: #00a9b5;
  --bopai-color-accent-light: #4dd4df;
  --bopai-color-secondary: #f59e0b;
  --bopai-color-text: #1e293b;
  --bopai-color-text-light: #64748b;
  --bopai-color-text-lighter: #94a3b8;
  --bopai-color-bg: #ffffff;
  --bopai-color-bg-alt: #f8fafc;
  --bopai-color-bg-soft: #f1f5f9;
  --bopai-color-border: #e2e8f0;
  --bopai-color-white: #ffffff;
  --bopai-radius-sm: 6px;
  --bopai-radius: 12px;
  --bopai-radius-lg: 20px;
  --bopai-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --bopai-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
  --bopai-shadow-hover: 0 12px 40px rgba(15, 23, 42, 0.14);
  --bopai-shadow-glow: 0 0 30px rgba(0, 169, 181, 0.15);
  --bopai-max-width: 1240px;
  --bopai-header-height: 76px;
  --bopai-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--bopai-color-text);
  background-color: var(--bopai-color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--bopai-color-primary);
  text-decoration: none;
  transition: var(--bopai-transition);
}

a:hover,
a:focus {
  color: var(--bopai-color-accent);
}

h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  line-height: 1.25;
  color: #0f172a;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.625rem, 4vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }

p {
  margin-top: 0;
  margin-bottom: 1.25rem;
  color: var(--bopai-color-text-light);
}

p strong {
  color: var(--bopai-color-text);
}

/* Screen reader / accessibility */
.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  padding: 0.5rem 1rem;
  background: var(--bopai-color-primary);
  color: var(--bopai-color-white);
}

/* Container */
.bopai-container {
  width: 100%;
  max-width: var(--bopai-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.bopai-content {
  padding-top: 4rem;
  padding-bottom: 5rem;
}

/* Header */
.bopai-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.bopai-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--bopai-header-height);
}

.bopai-logo {
  display: inline-flex;
  flex-direction: column;
  color: var(--bopai-color-text);
  font-weight: 800;
}

.bopai-logo:hover {
  text-decoration: none;
  color: var(--bopai-color-primary);
}

.bopai-logo__name {
  font-size: 1.35rem;
  line-height: 1.1;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--bopai-color-primary) 0%, var(--bopai-color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bopai-logo__tagline {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--bopai-color-text-light);
  letter-spacing: 0.03em;
  margin-top: 0.15rem;
}

/* Navigation */
.bopai-header__nav {
  display: flex;
  align-items: center;
}

.bopai-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.25rem;
}

.bopai-menu .menu-item {
  position: relative;
}

.bopai-menu a {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--bopai-color-text);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  transition: var(--bopai-transition);
}

.bopai-menu a:hover,
.bopai-menu a:focus,
.bopai-menu .current-menu-item a {
  color: var(--bopai-color-primary);
  background: rgba(15, 76, 129, 0.06);
  text-decoration: none;
}

.bopai-menu .current-menu-item a {
  background: rgba(15, 76, 129, 0.1);
}

.bopai-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--bopai-color-border);
  border-radius: var(--bopai-radius-sm);
  cursor: pointer;
  transition: var(--bopai-transition);
}

.bopai-nav-toggle:hover {
  border-color: var(--bopai-color-primary);
  background: rgba(15, 76, 129, 0.04);
}

.bopai-nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  margin: 3px auto;
  background: var(--bopai-color-text);
  transition: transform 0.25s ease, opacity 0.2s ease;
  border-radius: 2px;
}

.bopai-nav-toggle.is-active .bopai-nav-toggle__bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.bopai-nav-toggle.is-active .bopai-nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.bopai-nav-toggle.is-active .bopai-nav-toggle__bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Buttons */
.bopai-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--bopai-transition);
  text-decoration: none;
  box-shadow: var(--bopai-shadow-sm);
}

.bopai-button:hover,
.bopai-button:focus {
  transform: translateY(-2px);
  box-shadow: var(--bopai-shadow-hover);
  text-decoration: none;
}

.bopai-button--primary {
  background: linear-gradient(135deg, var(--bopai-color-primary) 0%, var(--bopai-color-primary-light) 100%);
  color: var(--bopai-color-white);
}

.bopai-button--primary:hover,
.bopai-button--primary:focus {
  background: linear-gradient(135deg, var(--bopai-color-primary-dark) 0%, var(--bopai-color-primary) 100%);
  color: var(--bopai-color-white);
}

.bopai-button--secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--bopai-color-white);
  border-color: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(4px);
}

.bopai-button--secondary:hover,
.bopai-button--secondary:focus {
  background: var(--bopai-color-white);
  color: var(--bopai-color-primary);
  border-color: var(--bopai-color-white);
}

.bopai-button--white {
  background: var(--bopai-color-white);
  color: var(--bopai-color-primary);
}

.bopai-button--white:hover,
.bopai-button--white:focus {
  background: var(--bopai-color-bg-soft);
  color: var(--bopai-color-primary-dark);
}

.bopai-button--accent {
  background: linear-gradient(135deg, var(--bopai-color-accent) 0%, var(--bopai-color-accent-light) 100%);
  color: var(--bopai-color-white);
}

.bopai-button--accent:hover,
.bopai-button--accent:focus {
  background: linear-gradient(135deg, #008a94 0%, var(--bopai-color-accent) 100%);
  color: var(--bopai-color-white);
}

.bopai-button--large {
  padding: 1.125rem 2.25rem;
  font-size: 1.0625rem;
}

/* Hero */
.bopai-hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 620px;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.bopai-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(5, 35, 60, 0.95) 0%, rgba(12, 58, 100, 0.85) 50%, rgba(0, 130, 140, 0.5) 100%);
}

.bopai-hero__pattern {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image: radial-gradient(circle at 2px 2px, rgba(255,255,255,0.95) 1px, transparent 0);
  background-size: 32px 32px;
}

.bopai-hero__content {
  position: relative;
  z-index: 2;
  color: var(--bopai-color-white);
  max-width: 720px;
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.bopai-hero__title {
  font-size: clamp(2.25rem, 5.5vw, 3.5rem);
  color: var(--bopai-color-white);
  margin-bottom: 1.25rem;
  line-height: 1.1;
  letter-spacing: -0.03em;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.25);
}

.bopai-hero__text {
  font-size: 1.1875rem;
  margin-bottom: 2.25rem;
  max-width: 600px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.2);
}

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

.bopai-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(0, 169, 181, 0.18);
  border: 1px solid rgba(0, 169, 181, 0.35);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #a5f3fc;
  margin-bottom: 1.25rem;
  backdrop-filter: blur(8px);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Sections */
.bopai-section {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.bopai-section:nth-child(even) {
  background: var(--bopai-color-bg-alt);
}

.bopai-section__header {
  text-align: center;
  margin-bottom: 3rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.bopai-section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 0.75rem;
  color: #0f172a;
}

.bopai-section__subtitle {
  color: var(--bopai-color-text-light);
  font-size: 1.125rem;
  margin-bottom: 0;
}

.bopai-section__eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--bopai-color-accent);
  margin-bottom: 0.75rem;
}

/* Grid */
.bopai-grid {
  display: grid;
  gap: 1.75rem;
}

.bopai-grid--categories {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.bopai-grid--products {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

/* Cards */
.bopai-card {
  display: flex;
  flex-direction: column;
  background: var(--bopai-color-white);
  border: 1px solid var(--bopai-color-border);
  border-radius: var(--bopai-radius);
  overflow: hidden;
  box-shadow: var(--bopai-shadow);
  transition: var(--bopai-transition);
}

.bopai-card:hover,
.bopai-card:focus {
  transform: translateY(-6px);
  box-shadow: var(--bopai-shadow-hover);
  border-color: rgba(0, 169, 181, 0.25);
  text-decoration: none;
}

.bopai-card__link {
  display: flex;
  flex-direction: column;
  flex: 1;
  color: inherit;
}

.bopai-card__link:hover {
  color: inherit;
}

.bopai-card__image {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bopai-color-bg-alt) 0%, var(--bopai-color-bg-soft) 100%);
  position: relative;
}

.bopai-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.bopai-card:hover .bopai-card__image img {
  transform: scale(1.08);
}

.bopai-card__body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.bopai-card__title {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: #0f172a;
}

.bopai-card__excerpt {
  color: var(--bopai-color-text-light);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.bopai-card__excerpt p {
  margin-bottom: 0;
}

.bopai-card__arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
  padding-top: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--bopai-color-primary);
  opacity: 0;
  transform: translateX(-8px);
  transition: var(--bopai-transition);
}

.bopai-card:hover .bopai-card__arrow {
  opacity: 1;
  transform: translateX(0);
}

/* Reveal on scroll */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* About section */
.bopai-row {
  display: flex;
  flex-wrap: wrap;
  margin-left: -1.25rem;
  margin-right: -1.25rem;
}

.bopai-row--valign-center {
  align-items: center;
}

.bopai-col {
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.bopai-col--half {
  width: 50%;
}

.bopai-col--wide {
  width: 68%;
}

.bopai-col--narrow {
  width: 32%;
}

.bopai-about img {
  border-radius: var(--bopai-radius);
  box-shadow: var(--bopai-shadow-hover);
}

.bopai-about__list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.bopai-about__list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--bopai-color-text-light);
}

.bopai-about__list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--bopai-color-accent);
  font-weight: 700;
}

/* CTA section */
.bopai-cta {
  position: relative;
  background: linear-gradient(135deg, var(--bopai-color-primary) 0%, var(--bopai-color-primary-dark) 100%);
  color: var(--bopai-color-white);
  overflow: hidden;
}

.bopai-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(0, 169, 181, 0.25) 0%, transparent 50%);
}

.bopai-cta__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.bopai-cta__text {
  max-width: 620px;
}

.bopai-cta__text h2 {
  color: var(--bopai-color-white);
  margin-bottom: 0.75rem;
  font-size: clamp(1.625rem, 4vw, 2.25rem);
}

.bopai-cta__text p {
  margin-bottom: 0;
  opacity: 0.92;
  color: rgba(255, 255, 255, 0.9);
}

/* Features / trust bar */
.bopai-trust {
  background: linear-gradient(180deg, #ffffff 0%, var(--bopai-color-bg-alt) 100%);
  border-bottom: 1px solid var(--bopai-color-border);
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.bopai-trust__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.bopai-trust__item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2rem 1.25rem;
  background: var(--bopai-color-white);
  border: 1px solid var(--bopai-color-border);
  border-radius: var(--bopai-radius);
  box-shadow: var(--bopai-shadow-sm);
  transition: var(--bopai-transition);
  overflow: hidden;
}

.bopai-trust__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--bopai-color-primary) 0%, var(--bopai-color-accent) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.bopai-trust__item:hover {
  transform: translateY(-5px);
  box-shadow: var(--bopai-shadow-hover);
  border-color: rgba(0, 169, 181, 0.25);
}

.bopai-trust__item:hover::before {
  opacity: 1;
}

.bopai-trust__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, rgba(15, 76, 129, 0.08) 0%, rgba(0, 169, 181, 0.08) 100%);
  color: var(--bopai-color-primary);
  border-radius: 16px;
  font-size: 1.75rem;
  line-height: 1;
  transition: var(--bopai-transition);
}

.bopai-trust__item:hover .bopai-trust__icon {
  background: linear-gradient(135deg, var(--bopai-color-primary) 0%, var(--bopai-color-accent) 100%);
  color: var(--bopai-color-white);
  transform: scale(1.08);
  box-shadow: 0 8px 24px rgba(15, 76, 129, 0.2);
}

.bopai-trust__title {
  font-size: 1rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 0.5rem;
}

.bopai-trust__text {
  font-size: 0.875rem;
  color: var(--bopai-color-text-light);
  margin-bottom: 0;
  line-height: 1.6;
  max-width: 200px;
}

@media (max-width: 900px) {
  .bopai-trust__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .bopai-trust__item {
    padding: 1.5rem 1rem;
  }
}

@media (max-width: 480px) {
  .bopai-trust {
    padding-top: 2rem;
    padding-bottom: 2rem;
  }

  .bopai-trust__grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }

  .bopai-trust__item {
    padding: 1.25rem 0.75rem;
    border-radius: var(--bopai-radius-sm);
  }

  .bopai-trust__icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    font-size: 1.375rem;
    margin-bottom: 0.875rem;
  }

  .bopai-trust__title {
    font-size: 0.8125rem;
    margin-bottom: 0.35rem;
  }

  .bopai-trust__text {
    font-size: 0.75rem;
    line-height: 1.5;
  }
}

/* Page header */
.bopai-page-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.bopai-page-title {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  margin-bottom: 0.75rem;
}

.bopai-page-header__desc {
  color: var(--bopai-color-text-light);
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.0625rem;
}

/* Page content */
.bopai-page__header {
  margin-bottom: 2rem;
}

.bopai-page__title {
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  margin-bottom: 0.5rem;
}

.bopai-page__content {
  max-width: 820px;
}

.bopai-page__content h2,
.bopai-page__content h3 {
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.bopai-page__content ul,
.bopai-page__content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.bopai-page__content li {
  margin-bottom: 0.5rem;
  color: var(--bopai-color-text-light);
}

/* Filter */
.bopai-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.625rem;
  margin-bottom: 2.5rem;
}

.bopai-filter__item {
  display: inline-flex;
  padding: 0.625rem 1.25rem;
  border: 1px solid var(--bopai-color-border);
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--bopai-color-text);
  background: var(--bopai-color-white);
  transition: var(--bopai-transition);
}

.bopai-filter__item:hover,
.bopai-filter__item:focus,
.bopai-filter__item.is-active {
  background: var(--bopai-color-primary);
  border-color: var(--bopai-color-primary);
  color: var(--bopai-color-white);
  text-decoration: none;
  box-shadow: var(--bopai-shadow);
}

/* Pagination */
.nav-links,
.pagination {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 3rem;
}

.nav-links a,
.nav-links span,
.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
  padding: 0 0.75rem;
  border: 1px solid var(--bopai-color-border);
  border-radius: var(--bopai-radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--bopai-color-text);
  background: var(--bopai-color-white);
  transition: var(--bopai-transition);
}

.nav-links a:hover,
.pagination a:hover {
  border-color: var(--bopai-color-primary);
  color: var(--bopai-color-primary);
}

.nav-links .current,
.pagination .current {
  background: var(--bopai-color-primary);
  border-color: var(--bopai-color-primary);
  color: var(--bopai-color-white);
  box-shadow: var(--bopai-shadow);
}

/* Product single */
.bopai-product-single__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  margin-bottom: 3.5rem;
  align-items: start;
}

.bopai-product-single__image {
  border-radius: var(--bopai-radius);
  overflow: hidden;
  background: linear-gradient(135deg, var(--bopai-color-bg-alt) 0%, var(--bopai-color-bg-soft) 100%);
  box-shadow: var(--bopai-shadow);
}

.bopai-product-single__image img {
  width: 100%;
  height: auto;
  display: block;
}

.bopai-product-single__title {
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  margin-bottom: 0.75rem;
}

.bopai-product-single__meta {
  color: var(--bopai-color-text-light);
  margin-bottom: 1.25rem;
  font-size: 0.9375rem;
}

.bopai-product-single__summary {
  font-size: 1.125rem;
  margin-bottom: 1.75rem;
  color: var(--bopai-color-text-light);
}

.bopai-product-single__content,
.bopai-product-single__specs,
.bopai-product-single__seo {
  margin-bottom: 3rem;
}

.bopai-product-single__content h2,
.bopai-product-single__specs h2,
.bopai-product-single__seo h2,
.bopai-product-single__content h3,
.bopai-product-single__specs h3,
.bopai-product-single__seo h3 {
  font-size: 1.375rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--bopai-color-border);
}

.bopai-product-single__seo {
  padding: 2rem;
  background: var(--bopai-color-bg-alt);
  border: 1px solid var(--bopai-color-border);
  border-radius: var(--bopai-radius);
}

.bopai-product-single__seo p:last-child {
  margin-bottom: 0;
}

.bopai-hint {
  color: var(--bopai-color-text-light);
  font-style: italic;
}

/* Inquiry form */
.bopai-inquiry-form {
  max-width: 760px;
  padding: 2rem;
  background: var(--bopai-color-bg-alt);
  border: 1px solid var(--bopai-color-border);
  border-radius: var(--bopai-radius);
  box-shadow: var(--bopai-shadow);
}

.bopai-inquiry-form__title {
  margin-bottom: 1.5rem;
}

.bopai-form-row {
  margin-bottom: 1.25rem;
}

.bopai-form-row--half {
  display: inline-block;
  width: calc(50% - 0.625rem);
  margin-right: 1.25rem;
}

.bopai-form-row--half:nth-child(even) {
  margin-right: 0;
}

.bopai-form-row label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--bopai-color-text);
}

.bopai-form-row .required {
  color: #dc2626;
}

.bopai-form-row input,
.bopai-form-row textarea,
.bopai-form-row select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--bopai-color-border);
  border-radius: var(--bopai-radius-sm);
  font-size: 1rem;
  background: var(--bopai-color-white);
  color: var(--bopai-color-text);
  transition: var(--bopai-transition);
}

.bopai-form-row input:focus,
.bopai-form-row textarea:focus,
.bopai-form-row select:focus {
  outline: none;
  border-color: var(--bopai-color-primary);
  box-shadow: 0 0 0 4px rgba(15, 76, 129, 0.1);
}

/* Notices */
.bopai-notice {
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  border-radius: var(--bopai-radius-sm);
  border-left: 4px solid;
}

.bopai-notice--success {
  background: #ecfdf5;
  border-color: #10b981;
  color: #065f46;
}

.bopai-notice--error {
  background: #fef2f2;
  border-color: #ef4444;
  color: #991b1b;
}

/* Footer */
.bopai-footer {
  background: linear-gradient(180deg, #0f172a 0%, #0a0f1d 100%);
  color: #94a3b8;
  padding-top: 4rem;
  padding-bottom: 2rem;
}

.bopai-footer h4 {
  color: var(--bopai-color-white);
  margin-bottom: 1.25rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.bopai-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.bopai-footer__brand p {
  color: #94a3b8;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.bopai-footer__brand .bopai-logo__name {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  display: inline-block;
}

.bopai-footer__brand .bopai-logo__tagline {
  color: #94a3b8;
}

.bopai-footer a {
  color: #cbd5e1;
}

.bopai-footer a:hover,
.bopai-footer a:focus {
  color: var(--bopai-color-accent-light);
}

.bopai-contact-list,
.bopai-footer-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.bopai-contact-list li,
.bopai-footer-menu li {
  margin-bottom: 0.75rem;
  font-size: 0.9375rem;
  line-height: 1.6;
}

.bopai-contact-list strong {
  color: #cbd5e1;
  font-weight: 600;
}

.bopai-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
  text-align: center;
  font-size: 0.875rem;
  color: #64748b;
}

.bopai-footer__bottom p {
  margin-bottom: 0;
  color: #64748b;
}

/* Sidebar */
.bopai-sidebar .widget {
  margin-bottom: 1.5rem;
  padding: 1.5rem;
  background: var(--bopai-color-bg-alt);
  border: 1px solid var(--bopai-color-border);
  border-radius: var(--bopai-radius);
}

.widget-title {
  font-size: 1.125rem;
  margin-bottom: 1rem;
  color: #0f172a;
}

.bopai-sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.bopai-sidebar li {
  margin-bottom: 0.5rem;
}

.bopai-sidebar a {
  color: var(--bopai-color-text-light);
  font-size: 0.9375rem;
}

.bopai-sidebar a:hover {
  color: var(--bopai-color-primary);
}

/* Entry */
.bopai-entry {
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--bopai-color-border);
}

.bopai-entry__title {
  font-size: 1.625rem;
  margin-bottom: 0.5rem;
}

.bopai-entry__title a {
  color: #0f172a;
}

.bopai-entry__title a:hover {
  color: var(--bopai-color-primary);
}

.bopai-entry__meta {
  color: var(--bopai-color-text-lighter);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.bopai-entry__content {
  font-size: 1.0625rem;
  line-height: 1.8;
}

.bopai-entry__content h2,
.bopai-entry__content h3 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.bopai-entry__content ul,
.bopai-entry__content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.bopai-entry__content li {
  margin-bottom: 0.625rem;
  color: var(--bopai-color-text-light);
}

.bopai-entry__content a {
  color: var(--bopai-color-primary);
  font-weight: 500;
}

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

/* WordPress alignment */
.alignleft {
  float: left;
  margin-right: 1.5rem;
  margin-bottom: 1rem;
}

.alignright {
  float: right;
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.aligncenter {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

/* Responsive */
@media (max-width: 1024px) {
  .bopai-footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --bopai-header-height: 68px;
  }

  .bopai-header__nav {
    position: relative;
  }

  .bopai-nav-toggle {
    display: flex;
  }

  .bopai-menu {
    display: none;
    position: absolute;
    top: calc(var(--bopai-header-height) - 1px);
    right: -1.5rem;
    width: 100vw;
    flex-direction: column;
    gap: 0;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--bopai-color-border);
    box-shadow: var(--bopai-shadow);
    padding: 0.75rem 0;
  }

  .bopai-menu.is-open {
    display: flex;
  }

  .bopai-menu .menu-item {
    width: 100%;
  }

  .bopai-menu a {
    display: block;
    padding: 0.875rem 1.5rem;
    border-bottom: 1px solid var(--bopai-color-border);
    border-radius: 0;
  }

  .bopai-col--half,
  .bopai-col--wide,
  .bopai-col--narrow {
    width: 100%;
  }

  .bopai-col--half + .bopai-col--half {
    margin-top: 2rem;
  }

  .bopai-product-single__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .bopai-form-row--half {
    width: 100%;
    margin-right: 0;
  }

  .bopai-hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .bopai-hero__actions .bopai-button {
    width: 100%;
  }

  .bopai-cta__inner {
    flex-direction: column;
    text-align: center;
  }

  .bopai-section {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }

  .bopai-footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .bopai-content {
    padding-top: 2.5rem;
    padding-bottom: 3.5rem;
  }

  .bopai-page-header {
    margin-bottom: 2rem;
  }
}

@media (max-width: 480px) {
  .bopai-hero {
    min-height: 520px;
  }

  .bopai-hero__content {
    padding-top: 2rem;
    padding-bottom: 2rem;
  }

  .bopai-section {
    padding-top: 2.75rem;
    padding-bottom: 2.75rem;
  }

  .bopai-card__body {
    padding: 1.25rem;
  }

  .bopai-product-single__seo,
  .bopai-inquiry-form {
    padding: 1.25rem;
  }

  .bopai-filter__item {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }
}