/* ==========================================================================
   IndoSmartHub - Premium Multi-Page Design System & Stylesheet
   Modern, Ultra-Responsive (Mobile-First Polish), SEO-Optimized
   ========================================================================== */

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

:root {
  /* Brand Palette */
  --primary: #0284c7;
  --primary-light: #38bdf8;
  --primary-dark: #0369a1;
  --primary-glow: rgba(2, 132, 199, 0.25);
  
  --secondary: #6366f1;
  --secondary-light: #818cf8;
  --secondary-glow: rgba(99, 102, 241, 0.22);

  --accent: #10b981;
  --accent-light: #34d399;
  --accent-glow: rgba(16, 185, 129, 0.2);

  --warning: #f59e0b;
  --danger: #ef4444;

  /* Dark Theme Default */
  --bg-main: #0b0f19;
  --bg-surface: #111827;
  --bg-surface-elevated: #1f2937;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(31, 41, 55, 0.95);
  --bg-glass: rgba(11, 15, 25, 0.82);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(56, 189, 248, 0.35);

  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  --text-inverse: #0b0f19;

  /* Fonts */
  --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Radii */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 26px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 25px -8px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 35px var(--primary-glow);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.45s cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout Constants */
  --container-max: 1200px;
  --header-height: 76px;
}

/* Light Theme Overrides */
[data-theme="light"] {
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --border-color: rgba(0, 0, 0, 0.08);
  --border-highlight: rgba(2, 132, 199, 0.35);

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  --text-inverse: #ffffff;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 25px -8px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 40px -15px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 35px rgba(2, 132, 199, 0.12);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  max-width: 100%;
  width: 100%;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

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

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

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.1rem, 4.5vw, 3.4rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.6rem); }
h4 { font-size: 1.15rem; }

p {
  color: var(--text-muted);
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 45%, var(--secondary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-gradient-emerald {
  background: linear-gradient(135deg, #34d399 0%, #10b981 50%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.highlight-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary-light);
  margin-bottom: 1rem;
  backdrop-filter: blur(8px);
}

[data-theme="light"] .highlight-badge {
  background: rgba(2, 132, 199, 0.08);
  border-color: rgba(2, 132, 199, 0.2);
  color: var(--primary);
}

.highlight-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-ring 1.8s cubic-bezier(0.24, 0, 0.38, 1) infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-header p {
  font-size: 1.05rem;
  margin-top: 10px;
}

/* Ambient Glow Orbs */
.ambient-glow {
  position: absolute;
  width: 450px;
  height: 450px;
  border-radius: 50%;
  filter: blur(130px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.3;
}

.glow-top-right {
  top: -80px;
  right: -80px;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
}

.glow-mid-left {
  top: 35%;
  left: -120px;
  background: radial-gradient(circle, var(--secondary) 0%, transparent 70%);
}

/* Header & Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  height: 68px;
  background: rgba(11, 15, 25, 0.94);
  box-shadow: var(--shadow-sm);
}

[data-theme="light"] .site-header.scrolled {
  background: rgba(255, 255, 255, 0.96);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  flex-shrink: 0;
}

.brand-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.15rem;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.3vw, 18px);
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
  padding: 6px 4px;
  white-space: nowrap;
}

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

[data-theme="light"] .nav-link:hover, [data-theme="light"] .nav-link.active {
  color: var(--primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-actions .btn-sm {
  padding: 8px 16px;
  font-size: 0.82rem;
  letter-spacing: -0.01em;
}

/* Language Switcher Segmented Pill */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.lang-switcher-btn {
  padding: 4px 10px;
  font-size: 0.76rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  transition: var(--transition-fast);
  cursor: pointer;
  line-height: 1;
  letter-spacing: 0.04em;
}

.lang-switcher-btn:hover {
  color: var(--text-main);
}

.lang-switcher-btn.active {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--primary-glow);
}

.mobile-lang-wrapper {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  margin-top: 8px;
  border-top: 1px solid var(--border-color);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition-fast);
}

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

/* Mobile Toggle Hamburger */
.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}

.mobile-toggle span {
  width: 20px;
  height: 2px;
  background-color: var(--text-main);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}
.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav Drawer Overlay */
.mobile-drawer-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.mobile-drawer-overlay.active {
  display: block;
  opacity: 1;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: var(--transition-normal);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #ffffff;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-primary:hover {
  box-shadow: 0 8px 24px rgba(2, 132, 199, 0.45);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: var(--bg-surface);
  border-color: var(--primary-light);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  border-color: var(--primary-light);
  color: var(--primary-light);
}

.btn-whatsapp {
  background: #25d366;
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.35);
}

.btn-whatsapp:hover {
  background: #22bf5b;
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.5);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.84rem;
}

/* Cards & Glass Container */
.card-glass {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card-glass:hover {
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* Hero Section */
.hero-section {
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 70px;
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-content h1 {
  margin-bottom: 18px;
}

.hero-content .hero-desc {
  font-size: 1.12rem;
  line-height: 1.7;
  margin-bottom: 30px;
  max-width: 560px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-stats-bar {
  display: flex;
  align-items: center;
  gap: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.hero-stat-number {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
}

.hero-stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Hero Visual Showcase */
.hero-visual {
  position: relative;
  z-index: 2;
}

.hero-dashboard-mockup {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 18px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
}

.mockup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.mockup-dots {
  display: flex;
  gap: 6px;
}

.mockup-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.mockup-url {
  background: var(--bg-main);
  padding: 3px 12px;
  border-radius: var(--radius-full);
  font-size: 0.74rem;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.mockup-body {
  display: grid;
  gap: 12px;
}

.mockup-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.mockup-widget-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.mockup-widget-info h5 {
  font-size: 0.92rem;
  margin-bottom: 2px;
}

.mockup-widget-info p {
  font-size: 0.78rem;
}

.floating-badge-card {
  position: absolute;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-md);
  z-index: 3;
}

.floating-badge-1 {
  bottom: -16px;
  left: -20px;
}

.floating-badge-2 {
  top: -16px;
  right: -16px;
}

/* Trust Ticker Strip */
.trust-strip {
  padding: 24px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
}

.trust-title {
  text-align: center;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.marquee-container {
  overflow: hidden;
  position: relative;
  display: flex;
  user-select: none;
  mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
}

.marquee-content {
  display: flex;
  gap: 36px;
  animation: scroll-marquee 25s linear infinite;
  align-items: center;
}

.marquee-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.92rem;
  white-space: nowrap;
}

@keyframes scroll-marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Page Banner (For Inner Sub-pages) */
.page-banner {
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 40px;
  text-align: center;
  background: radial-gradient(circle at 50% 0%, rgba(2, 132, 199, 0.12) 0%, transparent 70%);
  border-bottom: 1px solid var(--border-color);
}

.page-banner h1 {
  margin-bottom: 12px;
}

.page-banner p {
  font-size: 1.1rem;
  max-width: 650px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.breadcrumb a {
  color: var(--text-muted);
}
.breadcrumb a:hover {
  color: var(--primary-light);
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: 24px;
}

.service-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-top: 3px solid transparent;
}

.service-card:hover {
  border-top-color: var(--primary);
}

.service-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.15), rgba(99, 102, 241, 0.15));
  border: 1px solid var(--border-highlight);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary-light);
  margin-bottom: 20px;
}

.service-features-list {
  margin: 18px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-features-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.service-features-list li svg {
  color: var(--accent);
  flex-shrink: 0;
}

/* Products Section */
.products-container {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.product-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 34px;
}

.product-card.reverse .product-visual {
  order: 1;
}

.product-card.reverse .product-info {
  order: 2;
}

.product-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.badge-live {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-light);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-coming-soon {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-ai {
  background: rgba(99, 102, 241, 0.15);
  color: var(--secondary-light);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.product-tag {
  padding: 5px 10px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.product-visual {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-md);
}

.feature-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.feature-box {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  transition: var(--transition-fast);
}

.feature-box:hover {
  border-color: var(--primary-light);
  transform: translateY(-2px);
}

.feature-box svg {
  color: var(--primary-light);
  margin-bottom: 6px;
}

.feature-box h6 {
  font-size: 0.88rem;
  margin-bottom: 3px;
}

.feature-box p {
  font-size: 0.74rem;
  line-height: 1.4;
}

/* Calculator Section */
.calculator-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 36px;
}

.calc-options-group {
  margin-bottom: 24px;
}

.calc-options-group h4 {
  font-size: 1rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.calc-grid-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.calc-option-btn {
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  padding: 12px 14px;
  border-radius: var(--radius-md);
  text-align: left;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.calc-option-btn:hover {
  border-color: var(--primary-light);
  background: var(--bg-surface-elevated);
}

.calc-option-btn.active {
  border-color: var(--primary);
  background: rgba(2, 132, 199, 0.12);
  box-shadow: 0 0 0 1px var(--primary);
}

.calc-option-btn .title {
  font-weight: 600;
  font-size: 0.86rem;
  margin-bottom: 3px;
  color: var(--text-main);
}

.calc-option-btn .sub {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.calc-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.calc-checkbox-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
}

.calc-checkbox-item:hover {
  border-color: var(--border-highlight);
}

.calc-checkbox-item input[type="checkbox"] {
  width: 17px;
  height: 17px;
  accent-color: var(--primary);
  cursor: pointer;
}

.calc-checkbox-item label {
  font-size: 0.82rem;
  cursor: pointer;
  flex-grow: 1;
}

.calc-summary-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.summary-price-box {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  margin: 16px 0;
}

.summary-price-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.summary-price-val {
  font-family: var(--font-heading);
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--primary-light);
  margin: 4px 0;
}

.summary-specs-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.summary-specs-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.summary-specs-list li svg {
  color: var(--accent);
  flex-shrink: 0;
}

/* Articles Grid */
.articles-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.filter-btn {
  padding: 7px 16px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  gap: 24px;
}

.article-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.article-img-wrapper {
  position: relative;
  height: 190px;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 18px;
  background: var(--bg-surface-elevated);
}

.article-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.article-card:hover .article-img-wrapper img {
  transform: scale(1.04);
}

.article-cat-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 3px 9px;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--primary-light);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.article-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-card p {
  font-size: 0.88rem;
  margin-bottom: 16px;
  flex-grow: 1;
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary-light);
  margin-top: auto;
}

.article-link:hover {
  gap: 9px;
  color: var(--primary);
}

/* Static Article Content Styling */
.article-single-body {
  max-width: 800px;
  margin: 0 auto 50px;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-main);
}

.article-single-body h2 {
  margin: 36px 0 14px;
  font-size: 1.6rem;
}

.article-single-body h3 {
  margin: 28px 0 10px;
  font-size: 1.3rem;
}

.article-single-body p {
  margin-bottom: 18px;
  color: var(--text-muted);
}

.article-single-body ul, .article-single-body ol {
  margin: 14px 0 22px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--text-muted);
}

.article-single-body li {
  list-style: disc;
}
.article-single-body ol li {
  list-style: decimal;
}

.article-author-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 40px;
}

.author-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #ffffff;
  font-size: 1.2rem;
  flex-shrink: 0;
}

/* FAQ Accordion */
.faq-accordion {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-fast);
}

.faq-item.active {
  border-color: var(--border-highlight);
}

.faq-question {
  width: 100%;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-weight: 600;
  font-size: 0.98rem;
  text-align: left;
  cursor: pointer;
}

.faq-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--bg-surface-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  background: var(--primary);
  color: #ffffff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 20px;
}

.faq-item.active .faq-answer {
  padding-bottom: 18px;
}

.faq-answer p {
  font-size: 0.92rem;
  line-height: 1.65;
}

/* Contact & Forms */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 36px;
}

.contact-info-card {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-channel {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.channel-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(2, 132, 199, 0.1);
  border: 1px solid rgba(2, 132, 199, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  color: var(--primary-light);
  flex-shrink: 0;
}

.channel-details h5 {
  font-size: 0.92rem;
  margin-bottom: 3px;
}

.channel-details p, .channel-details a {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.84rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 0.92rem;
  transition: var(--transition-fast);
}

.form-control:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

/* Footer */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 25px;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 45px;
}

.footer-about p {
  margin-top: 14px;
  font-size: 0.88rem;
  max-width: 300px;
}

.footer-col h5 {
  font-size: 0.98rem;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--primary-light);
  transform: translateX(3px);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* Floating WhatsApp Widget */
.floating-wa-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
}

.floating-wa-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: #25d366;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.floating-wa-btn:hover {
  transform: scale(1.08);
}

.floating-wa-btn svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

.floating-wa-popup {
  position: absolute;
  bottom: 64px;
  right: 0;
  width: 300px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: none;
  animation: popup-slide 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.floating-wa-popup.open {
  display: block;
}

@keyframes popup-slide {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.wa-popup-header {
  background: #075e54;
  color: #ffffff;
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.wa-popup-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #128c7e;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.wa-popup-header h6 {
  font-size: 0.9rem;
  color: #ffffff;
}

.wa-popup-header span {
  font-size: 0.72rem;
  color: #d1fae5;
}

.wa-popup-body {
  padding: 14px;
  background: var(--bg-main);
}

.wa-msg-bubble {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border-top-left-radius: 2px;
  font-size: 0.82rem;
  margin-bottom: 12px;
  color: var(--text-main);
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  max-width: 580px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 30px;
  position: relative;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-surface-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--text-muted);
}