/* ══════════════════════════════════════════════
   SINOIL MACHINERY — B2B LEAD GEN HOMEPAGE
   Art direction: Industrial steel + amber gold
   Fonts: Cabinet Grotesk (display) + Satoshi (body)
══════════════════════════════════════════════ */

/* ── DESIGN TOKENS ── */
:root,
[data-theme='light'] {
  /* Surfaces — deep steel industrial */
  --color-bg: #f5f4f1;
  --color-surface: #faf9f7;
  --color-surface-2: #ffffff;
  --color-surface-offset: #eeece8;
  --color-surface-offset-2: #e6e4de;
  --color-divider: #dddbd5;
  --color-border: #d0cec7;

  /* Text */
  --color-text: #1a1814;
  --color-text-muted: #6b6860;
  --color-text-faint: #b0ae a8;
  --color-text-inverse: #f9f8f5;

  /* Primary — Industrial Steel Blue */
  --color-primary: #1d4e89;
  --color-primary-hover: #163d6e;
  --color-primary-active: #0f2d54;
  --color-primary-light: #dde6f3;

  /* Accent — Amber Gold (machinery, warmth) */
  --color-accent: #d97706;
  --color-accent-hover: #b45309;
  --color-accent-light: #fef3c7;

  /* Success */
  --color-success: #16a34a;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26, 24, 20, 0.08);
  --shadow-md: 0 4px 16px rgba(26, 24, 20, 0.1);
  --shadow-lg: 0 12px 40px rgba(26, 24, 20, 0.14);
  --shadow-xl: 0 24px 64px rgba(26, 24, 20, 0.18);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Type */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-hero: clamp(2.8rem, 1rem + 5.5vw, 5.5rem);

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;

  /* Layout */
  --content-default: 1200px;
  --content-narrow: 760px;
}

[data-theme='dark'] {
  --color-bg: #141210;
  --color-surface: #1a1916;
  --color-surface-2: #1e1d1a;
  --color-surface-offset: #232119;
  --color-surface-offset-2: #2a2822;
  --color-divider: #2e2c26;
  --color-border: #3a3830;
  --color-text: #e8e6e1;
  --color-text-muted: #8a887f;
  --color-text-faint: #55534c;
  --color-text-inverse: #1a1814;
  --color-primary: #5b8ec9;
  --color-primary-hover: #4278b8;
  --color-primary-active: #2e62a5;
  --color-primary-light: #1e2d42;
  --color-accent: #f59e0b;
  --color-accent-hover: #d97706;
  --color-accent-light: #2d2010;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #141210;
    --color-surface: #1a1916;
    --color-surface-2: #1e1d1a;
    --color-surface-offset: #232119;
    --color-surface-offset-2: #2a2822;
    --color-divider: #2e2c26;
    --color-border: #3a3830;
    --color-text: #e8e6e1;
    --color-text-muted: #8a887f;
    --color-text-faint: #55534c;
    --color-text-inverse: #1a1814;
    --color-primary: #5b8ec9;
    --color-primary-hover: #4278b8;
    --color-primary-light: #1e2d42;
    --color-accent: #f59e0b;
    --color-accent-hover: #d97706;
    --color-accent-light: #2d2010;
  }
}

/* ── BASE RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}
body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
ul[role='list'], ol[role='list'] { list-style: none; }
h1,h2,h3,h4,h5,h6 { text-wrap: balance; line-height: 1.2; font-family: var(--font-display); }
p, li { text-wrap: pretty; }
a, button, [role='button'], input, textarea, select {
  transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
button { cursor: pointer; background: none; border: none; }
input, button, textarea, select { font: inherit; color: inherit; }
::selection { background: color-mix(in srgb, var(--color-primary) 20%, transparent); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ── UTILITIES ── */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 5vw, var(--space-12));
}
.desktop-only { display: inline; }
@media (max-width: 640px) { .desktop-only { display: none; } }

/* ── SCROLL REVEAL ANIMATIONS ── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1);
}
.fade-in.visible { opacity: 1; transform: none; }

.reveal-card {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16,1,0.3,1), transform 0.6s cubic-bezier(0.16,1,0.3,1);
}
.reveal-card.visible { opacity: 1; transform: none; }

/* ══════════════════════════════
   HEADER
══════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: var(--shadow-md); }

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: 68px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}
.logo-text {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-text);
  white-space: nowrap;
}
.logo-sub { color: var(--color-text-muted); font-weight: 600; letter-spacing: 0; }

/* Nav */
.main-nav { margin-inline-start: auto; }
.main-nav ul {
  display: flex;
  list-style: none;
  gap: var(--space-1);
}
.main-nav a {
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
}
.main-nav a:hover { color: var(--color-text); background: var(--color-surface-offset); }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* WhatsApp header button */
.btn-whatsapp {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 600;
  color: #25d366;
  padding: var(--space-2) var(--space-4);
  border: 1.5px solid #25d366;
  border-radius: var(--radius-full);
}
.btn-whatsapp:hover { background: #25d366; color: white; }

/* Primary CTA */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 700;
  color: white;
  background: var(--color-primary);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
}
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-primary:active { transform: none; }

/* Mobile menu btn */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.mobile-menu-btn.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn.open span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile overlay */
.mobile-nav-overlay {
  position: fixed;
  inset: 68px 0 0;
  background: var(--color-surface);
  z-index: 90;
  padding: var(--space-8) var(--space-6);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16,1,0.3,1);
  border-top: 1px solid var(--color-divider);
}
.mobile-nav-overlay.open { transform: none; }
.mobile-nav-overlay ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); }
.mobile-nav-overlay a {
  display: block;
  text-decoration: none;
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
}
.mobile-nav-overlay a:hover { background: var(--color-surface-offset); }

@media (max-width: 900px) {
  .main-nav { display: none; }
  .btn-whatsapp { display: none; }
  .mobile-menu-btn { display: flex; }
}

/* ══════════════════════════════
   HERO
══════════════════════════════ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0d2137 0%, #1d3d6b 40%, #0f2a4a 70%, #1a1208 100%);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
/* Subtle industrial texture overlay */
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(217,119,6,0.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(29,78,137,0.3) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(0,0,0,0.2) 0%, transparent 70%);
}
.hero-gear-bg {
  position: absolute;
  right: -80px;
  top: -80px;
  width: 600px;
  height: 500px;
  opacity: 0.6;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-block: clamp(var(--space-16), 10vw, var(--space-24));
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: rgba(255,255,255,0.8);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
  backdrop-filter: blur(8px);
}
.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #25d366;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-title {
  font-size: var(--text-hero);
  font-weight: 800;
  color: white;
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin-bottom: var(--space-6);
  max-width: 14ch;
}
.hero-accent {
  background: linear-gradient(90deg, #f59e0b, #fbbf24, #f97316);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.72);
  max-width: 52ch;
  margin-bottom: var(--space-10);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-16);
}
.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  font-size: var(--text-base);
  font-weight: 700;
  color: #0d2137;
  background: linear-gradient(90deg, #f59e0b, #fbbf24);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  box-shadow: 0 4px 20px rgba(245,158,11,0.4);
}
.btn-hero-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(245,158,11,0.5); }
.btn-hero-primary:active { transform: none; }

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  font-size: var(--text-base);
  font-weight: 600;
  color: white;
  border: 1.5px solid rgba(255,255,255,0.3);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
}
.btn-hero-secondary:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.5); }

/* Stats bar */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
  padding: var(--space-5) var(--space-6);
  max-width: fit-content;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-inline: var(--space-6);
  gap: var(--space-1);
}
.stat-num {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  color: #fbbf24;
  line-height: 1;
  letter-spacing: -0.04em;
}
.stat-plus { font-size: 1.4rem; font-weight: 800; color: #fbbf24; line-height: 1; align-self: flex-start; }
.stat-icon { color: #fbbf24; }
.stat-label {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.65);
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
}
.stat-divider { width: 1px; height: 40px; background: rgba(255,255,255,0.15); flex-shrink: 0; }

.hero-scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255,255,255,0.4);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
  animation: scrollDown 2s ease-in-out infinite;
}
@keyframes scrollDown {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ══════════════════════════════
   SECTION COMMONS
══════════════════════════════ */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
}
.section-header {
  text-align: center;
  margin-bottom: clamp(var(--space-10), 4vw, var(--space-16));
}
.section-header--light .section-title,
.section-header--light .section-desc { color: white; }
.section-header--light .section-label { color: rgba(255,255,255,0.7); border-color: rgba(255,255,255,0.25); background: rgba(255,255,255,0.08); }

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}
.section-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-inline: auto;
  line-height: 1.7;
}

/* ══════════════════════════════
   PRODUCTS GRID
══════════════════════════════ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-5);
}
.product-card {
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition);
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-primary); }
.product-card:hover::before { opacity: 1; }

.product-card--featured {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  color: white;
  border-color: var(--color-primary);
}
.product-card--featured h3,
.product-card--featured p,
.product-card--featured .card-link { color: rgba(255,255,255,0.9) !important; }
.product-card--featured .product-icon svg { color: rgba(255,255,255,0.8); }
.product-card--featured:hover { border-color: var(--color-accent); }

.featured-tag {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-accent-light);
  padding: 2px var(--space-3);
  border-radius: var(--radius-full);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.product-card--featured .featured-tag { background: rgba(255,255,255,0.2); color: white; }

.product-icon {
  width: 52px;
  height: 52px;
  background: var(--color-primary-light);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.product-icon svg { width: 28px; height: 28px; }

.product-card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}
.product-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  flex: 1;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  margin-top: auto;
}
.card-link span { transition: transform var(--transition); }
.card-link:hover span { transform: translateX(4px); }

/* ══════════════════════════════
   OIL FLOW DIAGRAM
══════════════════════════════ */
.flow-section {
  background: var(--color-surface);
}
.flow-diagram {
  overflow-x: auto;
  padding-bottom: var(--space-4);
}
.flow-track {
  display: flex;
  align-items: center;
  gap: 0;
  min-width: 900px;
  padding: var(--space-8) 0;
}
.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
}
.flow-node {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: var(--color-surface-2);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.flow-node svg { width: 32px; height: 32px; }
.flow-step:hover .flow-node { background: var(--color-primary); color: white; border-color: var(--color-primary); transform: scale(1.1); box-shadow: var(--shadow-md); }

.active-node {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}
.flow-node--gold {
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  border-color: #f59e0b;
  color: white;
  box-shadow: 0 4px 16px rgba(245,158,11,0.4);
}
.flow-step--output .flow-label strong { color: var(--color-accent); }

.flow-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-align: center;
}
.flow-label strong {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}
.flow-label span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.flow-arrow {
  flex: 0 0 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-border), var(--color-border));
  position: relative;
  top: -28px;
}
.flow-arrow::after {
  content: '';
  position: absolute;
  right: -1px; top: -4px;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 8px solid var(--color-border);
}
.flow-arrow--gold { background: linear-gradient(90deg, var(--color-border), #f59e0b); }
.flow-arrow--gold::after { border-left-color: #f59e0b; }

/* ══════════════════════════════
   MATERIALS SECTION
══════════════════════════════ */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-4);
}
.material-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-4);
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
}
.material-card:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.material-card:hover .material-name,
.material-card:hover .material-yield { color: white; }

.material-icon { font-size: 2.4rem; line-height: 1; }
.material-name {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  line-height: 1.3;
}
.material-yield {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
}

/* ══════════════════════════════
   CAPACITY SECTION
══════════════════════════════ */
.capacity-section {
  background: linear-gradient(135deg, #0d2137 0%, #1d3d6b 60%, #0f2a4a 100%);
}
.capacity-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-5);
}
.capacity-card {
  background: rgba(255,255,255,0.06);
  border: 1.5px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  backdrop-filter: blur(8px);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.capacity-card:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.25);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}
.capacity-card--featured {
  background: linear-gradient(135deg, rgba(245,158,11,0.15), rgba(251,191,36,0.1));
  border-color: rgba(245,158,11,0.5);
}
.capacity-card--featured:hover { border-color: #f59e0b; }

.capacity-badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px var(--space-3);
  border-radius: var(--radius-full);
}
.capacity-badge--sm { background: rgba(22,163,74,0.2); color: #4ade80; }
.capacity-badge--md { background: rgba(245,158,11,0.2); color: #fbbf24; }
.capacity-badge--lg { background: rgba(99,102,241,0.2); color: #a5b4fc; }
.capacity-badge--xl { background: rgba(239,68,68,0.15); color: #fca5a5; }

.capacity-value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 800;
  color: white;
  line-height: 1;
  letter-spacing: -0.04em;
}
.capacity-value span {
  font-size: 1rem;
  color: rgba(255,255,255,0.6);
  font-weight: 600;
}
.capacity-card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  color: white;
}
.capacity-card ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.capacity-card li {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.65);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.capacity-card li::before { content: '✓'; color: #4ade80; font-weight: 700; font-size: 10px; }

.btn-capacity {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  font-size: var(--text-sm);
  font-weight: 700;
  color: white;
  background: rgba(255,255,255,0.12);
  border: 1.5px solid rgba(255,255,255,0.2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition);
}
.btn-capacity:hover { background: rgba(255,255,255,0.2); border-color: rgba(255,255,255,0.4); }
.btn-capacity--featured { background: linear-gradient(90deg, #f59e0b, #fbbf24); border-color: transparent; color: #0d2137; }
.btn-capacity--featured:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(245,158,11,0.4); }

/* ══════════════════════════════
   HOT PRODUCTS
══════════════════════════════ */
.hotproducts-section { background: var(--color-surface-offset); }
.hotproducts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}
.hp-card {
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition);
}
.hp-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-primary); }

.hp-img {
  height: 200px;
  background: linear-gradient(135deg, var(--color-primary-light), color-mix(in srgb, var(--color-accent-light) 50%, var(--color-primary-light)));
  display: flex;
  align-items: center;
  justify-content: center;
}
.hp-img-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-primary);
  opacity: 0.7;
}
.hp-img-placeholder svg { width: 80px; height: 80px; }
.hp-info { padding: var(--space-5) var(--space-6); display: flex; flex-direction: column; gap: var(--space-2); }
.hp-model {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hp-info h3 { font-size: var(--text-base); font-weight: 700; color: var(--color-text); }
.hp-capacity { font-size: var(--text-sm); color: var(--color-text-muted); }
.btn-inquiry {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: 1.5px solid color-mix(in srgb, var(--color-primary) 25%, transparent);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  text-decoration: none;
  margin-top: var(--space-2);
  transition: all var(--transition);
}
.btn-inquiry:hover { background: var(--color-primary); color: white; }

/* ══════════════════════════════
   WHY CHOOSE US
══════════════════════════════ */
.why-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 6vw, var(--space-16));
  align-items: start;
}
.why-text { display: flex; flex-direction: column; }
.why-text .section-title { text-align: left; }
.why-text .section-label { align-self: flex-start; }
.why-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  line-height: 1.7;
}
.why-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}
.why-feature {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}
.why-icon {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}
.why-icon svg { width: 20px; height: 20px; }
.why-feature strong { display: block; font-size: var(--text-sm); font-weight: 700; color: var(--color-text); margin-bottom: var(--space-1); }
.why-feature p { font-size: var(--text-xs); color: var(--color-text-muted); line-height: 1.5; }

/* Factory visual */
.factory-showcase { display: flex; flex-direction: column; gap: var(--space-4); }
.factory-img-main {
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-surface-offset);
  border: 1.5px solid var(--color-border);
}
.factory-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}
.factory-svg { width: 80%; max-width: 300px; }
.factory-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.factory-stat {
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.factory-stat strong { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 800; color: var(--color-primary); }
.factory-stat span { font-size: var(--text-xs); color: var(--color-text-muted); }

@media (max-width: 900px) {
  .why-inner { grid-template-columns: 1fr; }
  .why-features { grid-template-columns: 1fr; }
}

/* ══════════════════════════════
   PROJECTS
══════════════════════════════ */
.projects-section { background: var(--color-bg); }
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-5);
}
.project-card {
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  align-items: flex-start;
  transition: all var(--transition);
}
.project-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.project-flag { font-size: 2.4rem; flex-shrink: 0; }
.project-info { flex: 1; }
.project-info h3 { font-size: var(--text-base); font-weight: 700; color: var(--color-text); margin-bottom: var(--space-1); }
.project-scale { font-size: var(--text-sm); font-weight: 600; color: var(--color-accent); margin-bottom: var(--space-3); display: block; }
.project-details { list-style: none; display: flex; flex-direction: column; gap: var(--space-1); }
.project-details li { font-size: var(--text-xs); color: var(--color-text-muted); display: flex; align-items: center; gap: var(--space-2); }
.project-details li::before { content: '·'; color: var(--color-primary); font-weight: 700; font-size: 1.2em; }

/* ══════════════════════════════
   TESTIMONIALS
══════════════════════════════ */
.testimonials-section {
  background: linear-gradient(135deg, #0d2137, #1d3d6b);
}
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}
.testi-card {
  background: rgba(255,255,255,0.07);
  border: 1.5px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  backdrop-filter: blur(8px);
  transition: all var(--transition);
}
.testi-card:hover { background: rgba(255,255,255,0.1); transform: translateY(-4px); }
.testi-stars { color: #fbbf24; font-size: 1.2rem; letter-spacing: 2px; }
.testi-card blockquote {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.85);
  line-height: 1.75;
  font-style: italic;
  flex: 1;
  max-width: none;
}
.testi-author { display: flex; align-items: center; gap: var(--space-4); }
.testi-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 800;
  color: white;
  flex-shrink: 0;
}
.testi-author strong { display: block; font-size: var(--text-sm); font-weight: 700; color: white; }
.testi-author span { font-size: var(--text-xs); color: rgba(255,255,255,0.55); }

/* ══════════════════════════════
   CERTIFICATIONS
══════════════════════════════ */
.certs-section { background: var(--color-surface); }
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-5);
}
.cert-badge {
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-5);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
  transition: all var(--transition);
}
.cert-badge:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.cert-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 900;
  font-family: var(--font-display);
  letter-spacing: -0.03em;
}
.cert-icon--blue { background: #dde6f3; color: #1d4e89; }
.cert-icon--gold { background: #fef3c7; color: #d97706; }
.cert-icon--green { background: #dcfce7; color: #16a34a; }
.cert-icon--navy { background: #e0e7ff; color: #3730a3; }
.cert-icon--orange { background: #ffedd5; color: #ea580c; }
.cert-icon--purple { background: #f3e8ff; color: #9333ea; }
.cert-badge strong { font-size: var(--text-sm); font-weight: 700; color: var(--color-text); }
.cert-badge span { font-size: var(--text-xs); color: var(--color-text-muted); }

/* ══════════════════════════════
   BLOG
══════════════════════════════ */
.blog-section { background: var(--color-bg); }
.blog-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}
@media (max-width: 1024px) { .blog-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .blog-grid { grid-template-columns: 1fr; } }

.blog-card {
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}
.blog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-primary); }

.blog-img {
  height: 180px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 60%, #0a1e36 100%);
  display: flex;
  align-items: flex-start;
  padding: var(--space-4);
  position: relative;
  overflow: hidden;
}
.blog-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
}

                                                .blog-category {
  position: relative;
  z-index: 1;
  font-size: var(--text-xs);
  font-weight: 700;
  color: white;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 2px var(--space-3);
  border-radius: var(--radius-full);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  backdrop-filter: blur(4px);
}
.blog-content { padding: var(--space-5) var(--space-6); flex: 1; display: flex; flex-direction: column; gap: var(--space-2); }
.blog-content time { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 500; }
.blog-content h3 { font-size: var(--text-base); font-weight: 700; color: var(--color-text); line-height: 1.4; }
.blog-content p { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.6; flex: 1; }
.blog-link {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  margin-top: auto;
  display: inline-block;
}
.blog-link:hover { color: var(--color-accent); }

/* ══════════════════════════════
   FAQ
══════════════════════════════ */
.faq-section { background: linear-gradient(135deg, #0d2137, #1d3d6b); }
.faq-list {
  max-width: 800px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.faq-item {
  background: rgba(255,255,255,0.06);
  border: 1.5px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(8px);
  transition: border-color var(--transition);
}
.faq-item.open { border-color: rgba(245,158,11,0.4); }

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-base);
  font-weight: 600;
  color: white;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition);
}
.faq-question:hover { background: rgba(255,255,255,0.05); }
.faq-question svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: rgba(255,255,255,0.5);
  transition: transform var(--transition), color var(--transition);
}
.faq-item.open .faq-question svg { transform: rotate(180deg); color: #fbbf24; }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16,1,0.3,1);
}
.faq-item.open .faq-answer { max-height: 200px; }
.faq-answer p {
  padding: 0 var(--space-6) var(--space-5);
  font-size: var(--text-base);
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
  max-width: none;
}

/* ══════════════════════════════
   INQUIRY FORM
══════════════════════════════ */
.inquiry-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
}
.inquiry-inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(var(--space-12), 6vw, var(--space-20));
  align-items: start;
}
@media (max-width: 900px) { .inquiry-inner { grid-template-columns: 1fr; } }

.section-label--light { background: rgba(255,255,255,0.08); color: var(--color-accent); border-color: rgba(255,255,255,0); }

.inquiry-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  line-height: 1.15;
  margin-bottom: var(--space-4);
}
.inquiry-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  line-height: 1.7;
}
.inquiry-promises { display: flex; flex-direction: column; gap: var(--space-4); }
.promise-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}
.promise-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-success);
}

/* Form */
.inquiry-form {
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  box-shadow: var(--shadow-lg);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form-group label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--color-text-muted); opacity: 0.6; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 12%, transparent);
}
.form-group textarea { resize: vertical; min-height: 100px; }

.btn-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  font-size: var(--text-base);
  font-weight: 700;
  color: white;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-hover));
  border: none;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--color-primary) 30%, transparent);
}
.btn-submit svg { width: 18px; height: 18px; }
.btn-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 24px color-mix(in srgb, var(--color-primary) 40%, transparent); }
.btn-submit:active { transform: none; }

.form-note {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
  max-width: none;
}

/* ══════════════════════════════
   FOOTER
══════════════════════════════ */
.site-footer {
  background: #0d1a2d;
  color: rgba(255,255,255,0.65);
  padding-block: var(--space-16) var(--space-8);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 2.4fr;
  gap: var(--space-16);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: var(--space-8);
}
@media (max-width: 900px) { .footer-top { grid-template-columns: 1fr; } }

.footer-brand { display: flex; flex-direction: column; gap: var(--space-5); }
.footer-brand p { font-size: var(--text-sm); line-height: 1.7; }
.logo--footer .logo-text { color: white; }
.footer-social { display: flex; gap: var(--space-3); }
.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: all var(--transition);
}
.social-link:hover { background: var(--color-primary); color: white; }

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}
@media (max-width: 700px) { .footer-links { grid-template-columns: repeat(2, 1fr); } }

.footer-col h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-5);
  font-family: var(--font-display);
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-col a:hover { color: white; }
.footer-col--contact li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  line-height: 1.5;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.3);
}

/* ══════════════════════════════
   FLOATING ELEMENTS
══════════════════════════════ */
.float-wa {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: 200;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25d366;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(37,211,102,0.5);
  transition: all var(--transition);
}
.float-wa:hover { transform: scale(1.1); box-shadow: 0 8px 28px rgba(37,211,102,0.6); }
.float-wa-tooltip {
  position: absolute;
  right: calc(100% + 10px);
  background: #1a1814;
  color: white;
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  white-space: nowrap;
  opacity: 0;
  transform: translateX(8px);
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: none;
}
.float-wa:hover .float-wa-tooltip { opacity: 1; transform: none; }

.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: calc(var(--space-8) + 64px);
  z-index: 200;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  border: 1.5px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
  pointer-events: none;
}
.back-to-top.visible { opacity: 1; transform: none; pointer-events: auto; }
.back-to-top:hover { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.back-to-top svg { width: 18px; height: 18px; }

/* ══════════════════════════════
   RESPONSIVE ADJUSTMENTS
══════════════════════════════ */
@media (max-width: 640px) {
  .hero-stats { gap: var(--space-3); padding: var(--space-4); }
  .stat-item { padding-inline: var(--space-3); }
  .stat-divider { display: none; }
  .flow-track { min-width: 700px; }
  .capacity-grid { grid-template-columns: repeat(2, 1fr); }
  .materials-grid { grid-template-columns: repeat(3, 1fr); }
  .hotproducts-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: repeat(3, 1fr); }
  .back-to-top { display: none; }
}

/* ── Extra polish ── */
.main-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.flow-node.active-hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  transform: scale(1.12);
  box-shadow: var(--shadow-md);
}

/* Form success feedback */
.btn-submit:disabled { cursor: not-allowed; opacity: 0.9; }

/* Scrollbar styling */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

/* ====== Image replacements ====== */

.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  z-index: 0;
}

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

.product-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

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

.blog-img-actual {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.testi-avatar {
  border-radius: 50%;
  object-fit: cover;
}

.project-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}