/* Polybox — corporate homepage (inspired by Z-ONE Consulting layout) */

body.polybox-page {
  --pb-navy: #0c1a2e;
  --pb-navy-light: #132a45;
  --pb-accent: #1e5a8a;
  --pb-accent-hover: #2569a0;
  --pb-gold: #c9a227;
  --pb-surface: #ffffff;
  --pb-surface-alt: #f4f6f9;
  --pb-text: #1a2332;
  --pb-muted: #5c6b7f;
  --pb-line: rgba(26, 35, 50, 0.12);
  --pb-header-h: 72px;
  --pb-max: 1200px;
  --pb-section-pad: clamp(48px, 8vw, 88px);
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--pb-surface) !important;
  color: var(--pb-text);
  overscroll-behavior: none;
}

body.polybox-page::before {
  display: none !important;
}

/* Dark theme overrides */
:root[data-theme="dark"] body.polybox-page {
  --pb-navy: #060d18;
  --pb-navy-light: #0f1c2e;
  --pb-accent: #3d8fd4;
  --pb-accent-hover: #5aa3e0;
  --pb-surface: #0a1220;
  --pb-surface-alt: #0f1a2c;
  --pb-text: #e8eef7;
  --pb-muted: #8fa3be;
  --pb-line: rgba(255, 255, 255, 0.1);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--pb-header-h);
  background: var(--pb-navy);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  max-width: var(--pb-max);
  margin: 0 auto;
  height: 100%;
  padding: 0 clamp(20px, 4vw, 40px);
  display: flex;
  align-items: center;
  gap: 32px;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #fff;
  text-decoration: none;
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
}

.main-nav a {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  transition: color 0.2s ease;
}

.main-nav a:hover,
.main-nav a.is-active {
  color: #fff;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 16px;
}

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  color: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.35);
}

.icon-btn:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

.icon-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.icon-btn .icon-sun {
  display: none;
}

:root[data-theme="dark"] body.polybox-page .icon-btn .icon-moon {
  display: none;
}

:root[data-theme="dark"] body.polybox-page .icon-btn .icon-sun {
  display: block;
}

.icon-btn img {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  object-fit: cover;
  display: none;
}

.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;
}

/* Hero carousel */
.hero.carousel {
  position: relative;
  margin-top: var(--pb-header-h);
  background: var(--pb-navy);
  overflow: hidden;
}

.carousel-viewport {
  min-height: clamp(320px, 52vh, 480px);
  overflow: hidden;
}

.carousel-track {
  display: flex;
  transition: transform 0.55s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.carousel-slide {
  position: relative;
  flex: 0 0 100%;
  min-height: clamp(320px, 52vh, 480px);
  display: flex;
  align-items: center;
}

.slide-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-color: var(--pb-navy-light);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center center;
}

.slide-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(
      90deg,
      rgba(12, 26, 46, 0.92) 0%,
      rgba(12, 26, 46, 0.72) 38%,
      rgba(12, 26, 46, 0.28) 62%,
      rgba(12, 26, 46, 0.12) 100%
    ),
    linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.45) 100%);
}

.slide-bg--brand {
  background-image: url("/assets/polybox/banner-brand.png");
  background-position: center right;
}

.slide-bg--edu {
  background-image: url("/assets/polybox/banner-edu.png");
  background-position: center right;
}

.slide-bg--services {
  background-image: url("/assets/polybox/banner-services.png");
  background-position: center right;
}

.slide-bg--products {
  background-image: url("/assets/polybox/banner-products.png");
  background-position: center center;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--pb-max);
  margin: 0 auto;
  padding: clamp(48px, 10vw, 96px) clamp(56px, 8vw, 72px) clamp(72px, 12vw, 100px);
  width: 100%;
}

.hero-eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--pb-gold);
}

.hero-title {
  margin: 0 0 20px;
  font-size: clamp(40px, 8vw, 64px);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.05;
  color: #fff;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 4px;
  background: rgba(12, 26, 46, 0.45);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.carousel-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.5);
}

.carousel-btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.carousel-btn svg {
  width: 22px;
  height: 22px;
}

.carousel-btn--prev {
  left: clamp(12px, 3vw, 24px);
}

.carousel-btn--next {
  right: clamp(12px, 3vw, 24px);
}

.carousel-dots {
  position: absolute;
  bottom: clamp(20px, 4vw, 32px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 10px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.carousel-dot:hover {
  background: rgba(255, 255, 255, 0.35);
}

.carousel-dot.is-active {
  background: #fff;
  border-color: #fff;
  transform: scale(1.15);
}

.carousel-dot:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.hero-lead {
  margin: 0 0 32px;
  max-width: 32em;
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
}

.btn-outline {
  display: inline-block;
  padding: 12px 28px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.6);
  transition: background 0.2s ease, border-color 0.2s ease;
}

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

.btn-outline:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

/* Main sections */
.site-main {
  background: var(--pb-surface);
}

.block-section {
  max-width: var(--pb-max);
  margin: 0 auto;
  padding: var(--pb-section-pad) clamp(20px, 4vw, 40px);
  scroll-margin-top: var(--pb-header-h);
}

.block-section--alt {
  background: var(--pb-surface-alt);
  max-width: none;
  padding-left: clamp(20px, 4vw, 40px);
  padding-right: clamp(20px, 4vw, 40px);
}

.block-section--alt .block-head,
.block-section--alt .card-grid {
  max-width: var(--pb-max);
  margin-left: auto;
  margin-right: auto;
}

.block-head {
  margin-bottom: clamp(28px, 5vw, 48px);
}

.block-label {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--pb-accent);
}

.block-head h2 {
  margin: 0;
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--pb-text);
}

/* Card grids */
.card-grid {
  display: grid;
  gap: clamp(20px, 3vw, 28px);
}

.card-grid--2 {
  grid-template-columns: 1fr;
}

.card-grid--products {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .card-grid--products {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .card-grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* Info cards (services) */
.info-card {
  background: var(--pb-surface);
  border: 1px solid var(--pb-line);
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.block-section--alt .info-card {
  background: var(--pb-surface);
}

.info-card:hover {
  border-color: var(--pb-accent);
  box-shadow: 0 12px 40px rgba(12, 26, 46, 0.08);
}

.info-card-visual {
  height: 160px;
  background-color: var(--pb-navy-light);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center center;
}

.info-card-visual--dev {
  background-image: url("/assets/polybox/card-dev.png");
}

.info-card-visual--commerce {
  background-image: url("/assets/polybox/card-commerce.png");
}

.info-card-tag {
  margin: 20px 24px 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pb-muted);
}

.info-card h3 {
  margin: 8px 24px 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--pb-text);
}

.info-card > p {
  margin: 12px 24px 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--pb-muted);
  flex: 1;
}

.card-link {
  display: inline-block;
  margin: 20px 24px 24px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pb-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

.card-link:hover {
  color: var(--pb-accent-hover);
}

a.card-link::after,
.product-card .card-link::after {
  content: " →";
}

/* Product cards */
.product-card {
  display: flex;
  flex-direction: column;
  background: var(--pb-surface);
  border: 1px solid var(--pb-line);
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.product-card:hover {
  border-color: var(--pb-accent);
  box-shadow: 0 16px 48px rgba(12, 26, 46, 0.1);
  transform: translateY(-2px);
}

.product-card:focus-visible {
  outline: 2px solid var(--pb-accent);
  outline-offset: 2px;
}

.product-card-visual {
  height: 140px;
  background-color: var(--pb-surface-alt);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center center;
  border-bottom: 1px solid var(--pb-line);
}

.product-card-visual--minimaths {
  background-image: url("/assets/polybox/card-product-minimaths.png");
}

.product-card-visual--square-cube {
  background-image: url("/assets/polybox/card-product-square-cube.png");
}

.product-card-visual--mini-eng {
  background-image: url("/assets/polybox/card-product-mini-eng.png");
}

.product-card-visual--xiaoguwen {
  background-image: url("/assets/polybox/card-product-xiaoguwen.png");
}

.product-card-visual--novel {
  background-image: url("/assets/polybox/card-product-novel.png");
}

.product-card-visual--processing-speed {
  background-image: url("/assets/polybox/card-product-processing-speed.png");
}

.product-card-visual--dungeon {
  background-image: url("/assets/polybox/card-product-dungeon.png");
}

.product-card-tag {
  margin: 18px 22px 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pb-muted);
}

.product-card h3 {
  margin: 8px 22px 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--pb-text);
}

.product-card > p {
  margin: 10px 22px 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--pb-muted);
  flex: 1;
}

.product-card .card-link {
  margin: 18px 22px 22px;
  color: var(--pb-accent);
}

/* Footer */
.site-footer {
  background: var(--pb-navy);
  color: rgba(255, 255, 255, 0.75);
  padding: clamp(32px, 5vw, 48px) clamp(20px, 4vw, 40px);
}

.footer-inner {
  max-width: var(--pb-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}

.footer-nav a {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-nav a:hover {
  color: #fff;
}

.footer-copy {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.45);
}

/* Mobile header */
@media (max-width: 720px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
    padding-top: 12px;
    padding-bottom: 12px;
    height: auto;
    min-height: var(--pb-header-h);
  }

  .main-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    gap: 20px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .main-nav::-webkit-scrollbar {
    display: none;
  }

  .header-actions {
    margin-left: auto;
  }

  .site-header {
    height: auto;
  }

  .hero.carousel {
    margin-top: 0;
    padding-top: calc(var(--pb-header-h) + 8px);
  }

  .hero-inner {
    padding-left: clamp(48px, 12vw, 56px);
    padding-right: clamp(48px, 12vw, 56px);
  }

  .carousel-btn {
    width: 36px;
    height: 36px;
  }

  .carousel-btn svg {
    width: 18px;
    height: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .carousel-track {
    transition: none;
  }

  .carousel-dot {
    transition: none;
  }

  .product-card,
  .info-card,
  .main-nav a,
  .icon-btn,
  .btn-outline,
  .card-link,
  .carousel-btn {
    transition: none;
  }

  .product-card:hover {
    transform: none;
  }
}