@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* ═══════════════════════════════════════════════
   PULSE PUMP — DESIGN SYSTEM
   Industrial Dark Premium Theme
   ═══════════════════════════════════════════════ */

:root {
  /* ─── Color Palette ─── */
  --color-primary:       #0B1426;
  --color-primary-light: #101E35;
  --color-surface:       #131D2F;
  --color-surface-light: #1A2744;
  --color-accent:        #00E5FF;
  --color-accent-dim:    rgba(0, 229, 255, 0.15);
  --color-accent-glow:   rgba(0, 229, 255, 0.4);
  --color-cta:           #FFB347;
  --color-cta-hover:     #FFC76B;
  --color-success:       #00C853;
  --color-danger:        #FF5252;
  --color-text:          #FFFFFF;
  --color-text-secondary:#8B9DC3;
  --color-text-muted:    #5A6E8F;
  --color-border:        rgba(0, 229, 255, 0.12);
  --color-border-hover:  rgba(0, 229, 255, 0.3);
  --color-glass:         rgba(19, 29, 47, 0.7);
  --color-glass-border:  rgba(0, 229, 255, 0.08);
  --color-overlay:       rgba(11, 20, 38, 0.85);

  /* ─── Typography ─── */
  --font-primary:   'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:      'JetBrains Mono', 'Fira Code', monospace;
  --fs-xs:    clamp(0.7rem, 0.65rem + 0.25vw, 0.8rem);
  --fs-sm:    clamp(0.8rem, 0.75rem + 0.25vw, 0.9rem);
  --fs-base:  clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
  --fs-md:    clamp(1rem, 0.9rem + 0.5vw, 1.15rem);
  --fs-lg:    clamp(1.15rem, 1rem + 0.75vw, 1.4rem);
  --fs-xl:    clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
  --fs-2xl:   clamp(2rem, 1.5rem + 2.5vw, 3rem);
  --fs-3xl:   clamp(2.5rem, 1.8rem + 3.5vw, 4rem);
  --fs-hero:  clamp(2.8rem, 2rem + 4vw, 5rem);

  /* ─── Spacing ─── */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* ─── Layout ─── */
  --max-width:    1280px;
  --header-height: 72px;
  --border-radius-sm: 6px;
  --border-radius:    12px;
  --border-radius-lg: 20px;
  --border-radius-xl: 28px;

  /* ─── Transitions ─── */
  --transition-fast:   0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:   0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ─── Shadows ─── */
  --shadow-sm:   0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md:   0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg:   0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.15);
  --shadow-cta:  0 4px 20px rgba(255, 179, 71, 0.3);
}

/* ═══════════════════════════════════════════════
   RESET & BASE
   ═══════════════════════════════════════════════ */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-primary);
  overflow-x: hidden;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-cta);
}

::selection {
  background: var(--color-accent);
  color: var(--color-primary);
}

::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--color-surface-light);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-dim);
}

/* ═══════════════════════════════════════════════
   LAYOUT UTILITIES
   ═══════════════════════════════════════════════ */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.section-title {
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.section-title .accent {
  color: var(--color-accent);
}

.section-subtitle {
  font-size: var(--fs-md);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ═══════════════════════════════════════════════
   HEADER & NAVIGATION
   ═══════════════════════════════════════════════ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
  background: var(--color-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-glass-border);
  box-shadow: var(--shadow-md);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-lg);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-cta));
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: var(--fs-sm);
  color: var(--color-primary);
}

.logo-text span {
  color: var(--color-accent);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  color: var(--color-text-secondary);
  font-size: var(--fs-sm);
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-accent);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 60%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.lang-switch {
  display: flex;
  align-items: center;
  background: var(--color-surface);
  border-radius: var(--border-radius-sm);
  padding: 2px;
  border: 1px solid var(--color-border);
}

.lang-btn {
  padding: 4px 10px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-primary);
}

.lang-btn.active {
  background: var(--color-accent);
  color: var(--color-primary);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition-base);
  border-radius: 2px;
}

/* ═══════════════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════════════ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
  background-size: cover;
  background-position: center;
}

.hero-slide.active {
  opacity: 1;
}

.hero-slide::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(11, 20, 38, 0.92) 0%,
    rgba(11, 20, 38, 0.7) 50%,
    rgba(11, 20, 38, 0.85) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-accent-dim);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-xl);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

.hero-title {
  font-size: var(--fs-hero);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-xl);
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--color-accent), var(--color-cta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: var(--fs-md);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-2xl);
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--space-3xl);
  margin-top: var(--space-4xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.hero-stat-value {
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--color-accent);
  font-family: var(--font-mono);
}

.hero-stat-label {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: var(--space-xs);
}

/* Hero decoration */
.hero-decoration {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 500px;
  height: 500px;
  z-index: 1;
  pointer-events: none;
}

.hero-decoration .circle {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  animation: rotate-slow 30s linear infinite;
}

.hero-decoration .circle:nth-child(1) {
  width: 100%;
  height: 100%;
  opacity: 0.3;
}
.hero-decoration .circle:nth-child(2) {
  width: 75%;
  height: 75%;
  top: 12.5%;
  left: 12.5%;
  opacity: 0.2;
  animation-direction: reverse;
  animation-duration: 25s;
}
.hero-decoration .circle:nth-child(3) {
  width: 50%;
  height: 50%;
  top: 25%;
  left: 25%;
  opacity: 0.15;
  animation-duration: 20s;
}

/* ═══════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  font-family: var(--font-primary);
  font-size: var(--fs-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), #00B8D4);
  color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 229, 255, 0.4);
  color: var(--color-primary);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-dim);
  transform: translateY(-2px);
}

.btn-cta {
  background: linear-gradient(135deg, var(--color-cta), #FF9500);
  color: var(--color-primary);
  box-shadow: var(--shadow-cta);
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 179, 71, 0.5);
  color: var(--color-primary);
}

.btn-sm {
  padding: 8px 20px;
  font-size: var(--fs-xs);
}

.btn-lg {
  padding: 18px 40px;
  font-size: var(--fs-base);
}

.btn-icon {
  font-size: 1.1em;
}

/* ═══════════════════════════════════════════════
   CARDS
   ═══════════════════════════════════════════════ */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.card:hover::before {
  opacity: 1;
}

.card-glass {
  background: var(--color-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-glass-border);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius);
  background: var(--color-accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  font-size: 1.5rem;
  color: var(--color-accent);
  transition: background var(--transition-base);
}

.card:hover .card-icon {
  background: var(--color-accent);
  color: var(--color-primary);
}

.card-title {
  font-size: var(--fs-lg);
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.card-text {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.card-footer {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

/* ═══════════════════════════════════════════════
   ABOUT SECTION
   ═══════════════════════════════════════════════ */

.about { background: var(--color-primary); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.about-content .about-text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  line-height: 1.9;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.about-feature-icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: var(--border-radius-sm);
  background: var(--color-accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.1rem;
}

.about-feature-text h4 {
  font-size: var(--fs-sm);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.about-feature-text p {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  transition: all var(--transition-base);
}

.stat-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.stat-number {
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--color-accent);
  font-family: var(--font-mono);
  margin-bottom: var(--space-sm);
}

.stat-label {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ═══════════════════════════════════════════════
   PRODUCTS SECTION
   ═══════════════════════════════════════════════ */

.products {
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-light) 50%, var(--color-primary) 100%);
}

.brand-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

.brand-tab {
  padding: 10px 24px;
  font-family: var(--font-primary);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition-base);
}

.brand-tab.active, .brand-tab:hover {
  color: var(--color-primary);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.product-card {
  position: relative;
  overflow: hidden;
}

.product-card-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-surface-light));
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card-image img {
  transform: scale(1.05);
}

.product-card-body {
  padding: var(--space-xl);
}

.product-badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border-radius: 100px;
  margin-bottom: var(--space-md);
}

.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.product-spec {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  background: var(--color-primary);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-mono);
}

.product-spec strong {
  color: var(--color-text-secondary);
}

/* Product Modal */
.product-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.product-modal.active {
  opacity: 1;
  visibility: visible;
}

.product-modal-overlay {
  position: absolute;
  inset: 0;
  background: var(--color-overlay);
  backdrop-filter: blur(8px);
}

.product-modal-content {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-3xl);
  max-width: 900px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform var(--transition-base);
}

.product-modal.active .product-modal-content {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1.2rem;
}

.modal-close:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ═══════════════════════════════════════════════
   FLUID GUIDE SECTION
   ═══════════════════════════════════════════════ */

.fluid-guide {
  background: var(--color-primary);
  position: relative;
}

.fluid-guide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.search-container {
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
  position: relative;
}

.search-input {
  width: 100%;
  padding: 18px 24px 18px 56px;
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  color: var(--color-text);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  outline: none;
  transition: all var(--transition-base);
}

.search-input:focus {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.search-input::placeholder {
  color: var(--color-text-muted);
}

.search-icon {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: 1.2rem;
  pointer-events: none;
}

.search-results-count {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-xl);
}

.fluid-table-wrapper {
  overflow-x: auto;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
}

/* ═══════════════════════════════════════════════
   TABLES
   ═══════════════════════════════════════════════ */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}

.data-table thead {
  background: var(--color-surface-light);
  position: sticky;
  top: 0;
  z-index: 10;
}

.data-table th {
  padding: var(--space-lg) var(--space-xl);
  text-align: left;
  font-weight: 600;
  color: var(--color-accent);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

.data-table td {
  padding: var(--space-md) var(--space-xl);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: background var(--transition-fast);
}

.data-table tbody tr:hover {
  background: var(--color-accent-dim);
}

.data-table .fluid-name {
  color: var(--color-text);
  font-weight: 500;
}

.data-table .pump-code {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-weight: 500;
  font-size: var(--fs-xs);
}

/* ═══════════════════════════════════════════════
   SECTORS SECTION
   ═══════════════════════════════════════════════ */

.sectors {
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
}

.sector-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
}

.sector-card .card-icon {
  margin: 0 auto var(--space-lg);
  width: 64px;
  height: 64px;
  font-size: 1.8rem;
}

.sector-desc {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* ═══════════════════════════════════════════════
   SPARE PARTS SECTION
   ═══════════════════════════════════════════════ */

.spare-parts {
  background: var(--color-primary);
}

.spare-parts .search-container {
  margin-bottom: var(--space-2xl);
}

.price-tag {
  font-family: var(--font-mono);
  color: var(--color-cta);
  font-weight: 600;
}

/* ═══════════════════════════════════════════════
   CONTACT SECTION
   ═══════════════════════════════════════════════ */

.contact {
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-4xl);
}

.contact-info-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  margin-bottom: var(--space-lg);
  transition: all var(--transition-base);
}

.contact-info-card:hover {
  border-color: var(--color-accent);
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: var(--border-radius-sm);
  background: var(--color-accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.contact-info-label {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.contact-info-value {
  color: var(--color-text);
  font-weight: 500;
}

.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-3xl);
}

.form-group {
  margin-bottom: var(--space-xl);
}

.form-label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 14px 18px;
  font-family: var(--font-primary);
  font-size: var(--fs-sm);
  color: var(--color-text);
  background: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  outline: none;
  transition: all var(--transition-base);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-dim);
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238B9DC3' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-select option {
  background: var(--color-surface);
  color: var(--color-text);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  cursor: pointer;
}

.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  min-width: 18px;
  margin-top: 2px;
  accent-color: var(--color-accent);
  cursor: pointer;
}

.form-check-label {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.form-message {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--border-radius);
  font-size: var(--fs-sm);
  margin-top: var(--space-lg);
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(0, 200, 83, 0.1);
  border: 1px solid rgba(0, 200, 83, 0.3);
  color: var(--color-success);
}

.form-message.error {
  display: block;
  background: rgba(255, 82, 82, 0.1);
  border: 1px solid rgba(255, 82, 82, 0.3);
  color: var(--color-danger);
}

/* ═══════════════════════════════════════════════
   CHATBOT WIDGET
   ═══════════════════════════════════════════════ */

.chatbot-trigger {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), #00B8D4);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-primary);
  box-shadow: 0 4px 24px rgba(0, 229, 255, 0.4);
  z-index: 999;
  transition: all var(--transition-base);
}

.chatbot-trigger:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 32px rgba(0, 229, 255, 0.5);
}

.chatbot-trigger .close-icon { display: none; }
.chatbot-trigger.active .chat-icon { display: none; }
.chatbot-trigger.active .close-icon { display: block; }

.chatbot-window {
  position: fixed;
  bottom: 100px;
  right: 24px;
  width: 380px;
  height: 520px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 998;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.95);
  transition: all var(--transition-base);
}

.chatbot-window.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.chatbot-header {
  padding: var(--space-lg) var(--space-xl);
  background: var(--color-primary);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.chatbot-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1rem;
}

.chatbot-header-info h4 {
  font-size: var(--fs-sm);
  font-weight: 600;
}

.chatbot-status {
  font-size: var(--fs-xs);
  color: var(--color-success);
  display: flex;
  align-items: center;
  gap: 4px;
}

.chatbot-status .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse-dot 2s ease-in-out infinite;
}

.chatbot-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.chat-message {
  max-width: 85%;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--border-radius);
  font-size: var(--fs-sm);
  line-height: 1.6;
  animation: message-in 0.3s ease;
}

.chat-message.bot {
  align-self: flex-start;
  background: var(--color-primary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  border-bottom-left-radius: 4px;
}

.chat-message.user {
  align-self: flex-end;
  background: var(--color-accent);
  color: var(--color-primary);
  border-bottom-right-radius: 4px;
}

.chat-typing {
  align-self: flex-start;
  display: flex;
  gap: 4px;
  padding: var(--space-md) var(--space-lg);
}

.chat-typing .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-text-muted);
  animation: typing 1.4s infinite;
}

.chat-typing .dot:nth-child(2) { animation-delay: 0.2s; }
.chat-typing .dot:nth-child(3) { animation-delay: 0.4s; }

.chatbot-input {
  padding: var(--space-lg);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--space-sm);
}

.chatbot-input input {
  flex: 1;
  padding: 10px 16px;
  font-family: var(--font-primary);
  font-size: var(--fs-sm);
  color: var(--color-text);
  background: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  outline: none;
}

.chatbot-input input:focus {
  border-color: var(--color-accent);
}

.chatbot-input button {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius);
  background: var(--color-accent);
  border: none;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.chatbot-input button:hover {
  background: var(--color-cta);
}

/* ═══════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════ */

.footer {
  background: var(--color-primary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand .logo {
  margin-bottom: var(--space-lg);
}

.footer-brand-desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 300px;
}

.footer-title {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-xl);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-md);
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  transition: all var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copy {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.footer-copy a {
  color: var(--color-accent);
}

/* ═══════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════ */

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

@keyframes rotate-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes typing {
  0%, 100% { opacity: 0.3; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(-3px); }
}

@keyframes message-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes counter {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════════
   LIGHT THEME
   ═══════════════════════════════════════════════ */

[data-theme="light"] {
  --color-primary:       #F0F4F8;
  --color-primary-light: #E8EDF2;
  --color-surface:       #FFFFFF;
  --color-surface-light: #F5F7FA;
  --color-accent:        #0091EA;
  --color-accent-dim:    rgba(0, 145, 234, 0.1);
  --color-accent-glow:   rgba(0, 145, 234, 0.25);
  --color-cta:           #FF8F00;
  --color-cta-hover:     #FFA726;
  --color-text:          #1A2332;
  --color-text-secondary:#4A5568;
  --color-text-muted:    #718096;
  --color-border:        rgba(0, 0, 0, 0.1);
  --color-border-hover:  rgba(0, 145, 234, 0.3);
  --color-glass:         rgba(255, 255, 255, 0.85);
  --color-glass-border:  rgba(0, 0, 0, 0.06);
  --color-overlay:       rgba(255, 255, 255, 0.9);

  --shadow-sm:   0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md:   0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-lg:   0 8px 40px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 20px rgba(0, 145, 234, 0.1);
  --shadow-cta:  0 4px 20px rgba(255, 143, 0, 0.2);
}

[data-theme="light"] .hero-slide::after {
  background: linear-gradient(
    135deg,
    rgba(240, 244, 248, 0.92) 0%,
    rgba(240, 244, 248, 0.7) 50%,
    rgba(240, 244, 248, 0.85) 100%
  );
}

[data-theme="light"] .hero-title .highlight {
  background: linear-gradient(135deg, var(--color-accent), var(--color-cta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="light"] ::selection {
  background: var(--color-accent);
  color: #FFFFFF;
}

[data-theme="light"] ::-webkit-scrollbar-track {
  background: var(--color-primary);
}
[data-theme="light"] ::-webkit-scrollbar-thumb {
  background: #CBD5E0;
}

[data-theme="light"] .btn-primary {
  box-shadow: 0 4px 20px rgba(0, 145, 234, 0.25);
}

[data-theme="light"] .btn-secondary {
  color: var(--color-text);
}

[data-theme="light"] .logo-icon {
  color: #FFFFFF;
}

/* ─── Theme Toggle Button ─── */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all var(--transition-base);
  color: var(--color-text-secondary);
}

.theme-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: rotate(15deg);
}

.theme-toggle .icon-light { display: none; }
.theme-toggle .icon-dark  { display: block; }
[data-theme="light"] .theme-toggle .icon-light { display: block; }
[data-theme="light"] .theme-toggle .icon-dark  { display: none; }

/* ═══════════════════════════════════════════════
   COLLAPSIBLE TABLE
   ═══════════════════════════════════════════════ */

.table-collapsible {
  position: relative;
  overflow: hidden;
  transition: max-height 0.5s ease;
}

.table-collapsible.collapsed {
  max-height: 520px;
}

.table-collapsible.collapsed::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(to bottom, transparent, var(--color-primary));
  pointer-events: none;
  z-index: 5;
}

[data-theme="light"] .table-collapsible.collapsed::after {
  background: linear-gradient(to bottom, transparent, var(--color-primary));
}

.table-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin: var(--space-xl) auto 0;
  padding: 10px 28px;
  font-family: var(--font-primary);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition-base);
}

.table-toggle-btn:hover {
  background: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

.table-toggle-btn .toggle-icon {
  transition: transform var(--transition-base);
}

.table-toggle-btn.expanded .toggle-icon {
  transform: rotate(180deg);
}

/* ═══════════════════════════════════════════════
   SECTOR CARD LINKS
   ═══════════════════════════════════════════════ */

.sector-card {
  cursor: pointer;
  text-decoration: none;
  display: block;
  color: inherit;
}

a.sector-card:hover {
  color: inherit;
}

.sector-card .sector-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--space-md);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-accent);
  opacity: 0;
  transform: translateY(4px);
  transition: all var(--transition-base);
}

.sector-card:hover .sector-link {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════════
   FLUID TABLE CLICKABLE ROWS
   ═══════════════════════════════════════════════ */

.data-table tbody tr.clickable-row {
  cursor: pointer;
}

.data-table tbody tr.clickable-row:hover .pump-code {
  text-decoration: underline;
}

/* ═══════════════════════════════════════════════
   RESPONSIVE DESIGN
   ═══════════════════════════════════════════════ */

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }

  .hero-decoration { display: none; }
  .hero-stats { gap: var(--space-xl); }
}

@media (max-width: 768px) {
  :root { --header-height: 64px; }

  .container { padding: 0 var(--space-lg); }
  .section { padding: var(--space-4xl) 0; }

  .nav { display: none; }
  .nav.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    top: var(--header-height);
    background: var(--color-primary);
    padding: var(--space-2xl);
    gap: var(--space-md);
    z-index: 999;
    border-top: 1px solid var(--color-border);
  }

  .mobile-menu-btn { display: flex; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

  .hero-title { font-size: var(--fs-3xl); }
  .hero-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }

  .form-row { grid-template-columns: 1fr; }

  .about-features { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .footer-bottom { flex-direction: column; gap: var(--space-md); text-align: center; }

  .chatbot-window {
    right: 8px;
    left: 8px;
    bottom: 90px;
    width: auto;
    height: 70vh;
  }

  .brand-tabs {
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: var(--space-sm);
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 480px) {
  .section-header { margin-bottom: var(--space-2xl); }
  .card { padding: var(--space-xl); }
  .contact-form { padding: var(--space-xl); }
}