/* ==========================================================================
   KEYTOOLS DESIGN SYSTEM - MODERN GLASSMORPHISM THEME
   Supports Seamless Light & Dark Modes + Smooth Transitions
   ========================================================================== */

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

:root, [data-theme="light"] {
  /* Brand Colors */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-primary-glow: rgba(37, 99, 235, 0.25);
  --color-accent: #7c3aed;
  --color-accent-light: #f5f3ff;
  --color-cyan: #06b6d4;
  --color-emerald: #10b981;
  --color-orange: #f59e0b;
  --color-pink: #ec4899;

  /* Theme Neutrals - Light Mode */
  --bg-body: #ffffff;
  --bg-surface: #f8fafc;
  --bg-surface-elevated: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-glass-card: rgba(255, 255, 255, 0.92);
  --border-color: rgba(226, 232, 240, 0.85);
  --border-focus: #93c5fd;

  --text-main: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-dim: #94a3b8;

  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --white: #ffffff;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(37, 99, 235, 0.12);
  --orb-opacity: 0.35;
}

[data-theme="dark"] {
  /* Brand Colors in Dark */
  --color-primary: #3b82f6;
  --color-primary-hover: #60a5fa;
  --color-primary-light: rgba(59, 130, 246, 0.15);
  --color-primary-glow: rgba(59, 130, 246, 0.35);
  --color-accent: #a855f7;
  --color-accent-light: rgba(168, 85, 247, 0.15);
  --color-cyan: #22d3ee;
  --color-emerald: #34d399;
  --color-orange: #fbbf24;
  --color-pink: #f472b6;

  /* Theme Neutrals - Dark Mode */
  --bg-body: #0b0f19;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #1e293b;
  --bg-glass: rgba(11, 15, 25, 0.85);
  --bg-glass-card: rgba(17, 24, 39, 0.8);
  --border-color: rgba(51, 65, 85, 0.85);
  --border-focus: #3b82f6;

  --text-main: #f8fafc;
  --text-body: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --slate-50: #0f172a;
  --slate-100: #1e293b;
  --slate-200: #334155;
  --slate-300: #475569;
  --slate-400: #64748b;
  --slate-500: #94a3b8;
  --slate-600: #cbd5e1;
  --slate-700: #e2e8f0;
  --slate-800: #f1f5f9;
  --slate-900: #ffffff;
  --white: #1e293b;

  /* Shadows Dark */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
  --orb-opacity: 0.22;
}

:root {
  --font-main: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
  --container-max-w: 1240px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-body);
  color: var(--text-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

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

button, input, textarea, select {
  font: inherit;
}

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

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

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, #6366f1 50%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-text-blue {
  background: linear-gradient(135deg, #38bdf8 0%, #2563eb 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Glow Background Orbs */
.hero-orb {
  position: absolute;
  border-radius: 9999px;
  filter: blur(100px);
  opacity: var(--orb-opacity);
  pointer-events: none;
  z-index: 0;
  animation: pulse-slow 8s infinite alternate ease-in-out;
}

.hero-orb-blue {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, #3b82f6 0%, #60a5fa 100%);
  top: -150px;
  left: -200px;
}

.hero-orb-purple {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #8b5cf6 0%, #a78bfa 100%);
  bottom: -100px;
  right: -150px;
}

.hero-orb-cyan {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #06b6d4 0%, #67e8f9 100%);
  top: 35%;
  left: 45%;
}

@keyframes pulse-slow {
  0% { transform: scale(1) translate(0, 0); }
  50% { transform: scale(1.08) translate(15px, -15px); }
  100% { transform: scale(0.96) translate(-10px, 10px); }
}

/* Glassmorphism Elements */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.glass-card {
  background: var(--bg-glass-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 1.25rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-smooth);
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(96, 165, 250, 0.8);
  box-shadow: var(--shadow-xl);
}

/* Header & Navbar */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all var(--transition-base);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
}

.brand-logo img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  object-fit: cover;
  transition: transform var(--transition-fast);
}

.brand-logo:hover img {
  transform: scale(1.08);
}

.nav-links {
  display: none;
  align-items: center;
  gap: 1.85rem;
  list-style: none;
}

@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  position: relative;
  padding: 0.5rem 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-fast);
}

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

.nav-actions {
  display: none;
  align-items: center;
  gap: 0.75rem;
}

@media (min-width: 1024px) {
  .nav-actions {
    display: flex;
  }
}

/* Theme Toggle Button */
.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 0.65rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-body);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

/* Language Switcher */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.65rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-body);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-btn {
  border: none;
  background: none;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.15rem 0.4rem;
  border-radius: 9999px;
  transition: all var(--transition-fast);
}

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

/* Mobile Menu Toggle */
.mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  cursor: pointer;
  color: var(--text-main);
}

@media (min-width: 1024px) {
  .mobile-toggle {
    display: none;
  }
}

.mobile-menu {
  position: fixed;
  top: 4.5rem;
  left: 0;
  right: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem;
  box-shadow: var(--shadow-xl);
  display: none;
  flex-direction: column;
  gap: 1.25rem;
  z-index: 999;
}

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

.mobile-nav-link {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.65rem 1.35rem;
  border-radius: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-smooth);
  border: 1px solid transparent;
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1d4ed8 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--color-primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-outline {
  background: var(--bg-surface);
  border-color: var(--border-color);
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
}

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

.btn-lg {
  padding: 0.875rem 1.85rem;
  font-size: 1.05rem;
  border-radius: 0.85rem;
}

.btn-icon {
  width: 1.25rem;
  height: 1.25rem;
}

/* Badge Pills */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border: 1px solid var(--border-color);
  margin-bottom: 1.25rem;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 9999px;
  background-color: var(--color-emerald);
  animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
  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); }
}

/* Sections Common */
section {
  position: relative;
  padding: 5.5rem 0;
}

.section-tag {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.85rem;
  }
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Hero Section */
.hero-section {
  padding-top: 8rem;
  padding-bottom: 5rem;
  overflow: hidden;
  background: radial-gradient(circle at 50% 10%, var(--bg-surface) 0%, var(--bg-body) 70%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.hero-content {
  position: relative;
  z-index: 10;
}

.hero-title {
  font-size: 2.65rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  color: var(--text-main);
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3.25rem;
  }
}

@media (min-width: 1200px) {
  .hero-title {
    font-size: 3.75rem;
  }
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.25rem;
  max-width: 600px;
}

.hero-cta-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 640px) {
  .hero-cta-group {
    flex-direction: row;
  }
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-color);
  max-width: 520px;
}

.stat-item {
  text-align: left;
}

.stat-number {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Software Preview Window Mockup */
.mockup-window {
  border-radius: 1.25rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  position: relative;
  transition: transform var(--transition-smooth);
}

.mockup-window:hover {
  transform: translateY(-4px);
}

.mockup-header {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
}

.mockup-dots {
  display: flex;
  gap: 0.4rem;
}

.mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 9999px;
}

.mockup-dot.red { background-color: #f87171; }
.mockup-dot.yellow { background-color: #fbbf24; }
.mockup-dot.green { background-color: #34d399; }

.mockup-title {
  flex: 1;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.mockup-body {
  padding: 1.25rem;
  background: var(--bg-surface-elevated);
}

/* Infinite Marquee */
.marquee-wrapper {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  overflow: hidden;
  white-space: nowrap;
}

.marquee-track {
  display: inline-flex;
  gap: 2.5rem;
  animation: marquee 25s linear infinite;
}

.marquee-item {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.marquee-dot {
  color: var(--color-primary);
}

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

/* Ecosystem / Tools Grid */
.ecosystem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .ecosystem-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 2.25rem;
  border-radius: 1.5rem;
  height: 100%;
}

.tool-card.featured {
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.badge-featured {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
}

.badge-soon {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
}

.tool-icon-box {
  width: 54px;
  height: 54px;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.tool-icon-box.blue { background: var(--color-primary-light); color: var(--color-primary); }
.tool-icon-box.purple { background: var(--color-accent-light); color: var(--color-accent); }
.tool-icon-box.emerald { background: rgba(16, 185, 129, 0.15); color: var(--color-emerald); }
.tool-icon-box.orange { background: rgba(245, 158, 11, 0.15); color: var(--color-orange); }

.tool-name {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.tool-tagline {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.tool-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex: 1;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 2rem;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.9rem;
  color: var(--text-body);
}

.feature-check {
  width: 18px;
  height: 18px;
  border-radius: 9999px;
  background: rgba(16, 185, 129, 0.18);
  color: var(--color-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-weight: 700;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-box {
  padding: 2rem;
}

.feature-box-icon {
  width: 48px;
  height: 48px;
  border-radius: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.feature-box-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.65rem;
}

.feature-box-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 4-Tier Pricing Grid */
.pricing-grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .pricing-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .pricing-grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.pricing-card {
  padding: 2.25rem 1.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
  border-radius: 1.25rem;
}

.pricing-card.popular {
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-xl);
}

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #ffffff;
  padding: 0.25rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

.pricing-plan-name {
  font-size: 1.1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  margin-bottom: 0.35rem;
}

.price-amount {
  font-size: 2.15rem;
  font-weight: 800;
  color: var(--text-main);
}

.price-period {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.pricing-note {
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  min-height: 2.5rem;
}

/* Comparison Table */
.table-wrapper {
  overflow-x: auto;
  border-radius: 1.25rem;
  border: 1px solid var(--border-color);
  background: var(--bg-surface-elevated);
  box-shadow: var(--shadow-md);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th {
  padding: 1.25rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
}

.comparison-table td {
  padding: 1rem 1.5rem;
  font-size: 0.9rem;
  color: var(--text-body);
  border-bottom: 1px solid var(--border-color);
}

.comparison-table tr:hover td {
  background: var(--bg-surface);
}

.comparison-table td:nth-child(2),
.comparison-table th:nth-child(2) {
  background: var(--color-primary-light);
  font-weight: 600;
}

/* FAQ Accordion */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
  transition: transform var(--transition-smooth);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth);
}

.faq-answer-inner {
  padding: 0 1.5rem 1.5rem 1.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Contact Cards */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.channel-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
  border-radius: 1rem;
}

.channel-icon {
  width: 48px;
  height: 48px;
  border-radius: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.channel-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

.channel-info p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.channel-actions {
  margin-left: auto;
  display: flex;
  gap: 0.5rem;
}

/* Form Styles */
input, select, textarea {
  color: var(--text-main);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* Modal for QR Code */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11, 15, 25, 0.7);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.open {
  display: flex;
}

.modal-content {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 1.5rem;
  padding: 2.5rem;
  max-width: 400px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-2xl);
  position: relative;
  animation: modal-pop 0.25s ease-out;
}

@keyframes modal-pop {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

/* Footer */
footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 4.5rem 0 2rem 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

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

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }
}

.footer-col h5 {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-dim);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 46px;
  height: 46px;
  border-radius: 0.75rem;
  background: var(--color-primary);
  color: #ffffff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px var(--color-primary-glow);
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all var(--transition-base);
  z-index: 99;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--color-primary-hover);
  transform: translateY(-3px);
}

/* ==========================================================================
   Minimalist Language Switcher (Compact & Elegant Pill)
   ========================================================================== */
.lang-switch {
  display: inline-flex;
  align-items: center;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 2px 3px;
  gap: 2px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  user-select: none;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 3px 8px;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  line-height: 1;
  font-size: 0.72rem;
}

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

.lang-btn.active {
  background: var(--color-primary);
  color: #ffffff !important;
  font-weight: 800;
  box-shadow: 0 1px 4px rgba(37, 99, 235, 0.3);
}

/* ==========================================================================
   Navigation Dropdown Menu (Sản Phẩm / Products)
   ========================================================================== */
.nav-item-dropdown {
  position: relative;
}

.dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
}

.dropdown-toggle svg {
  transition: transform 0.2s ease;
}

.nav-item-dropdown:hover .dropdown-toggle svg {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 320px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.6rem;
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.nav-item-dropdown:hover .dropdown-menu,
.nav-item-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  color: var(--text-main);
  text-decoration: none;
  transition: all 0.15s ease;
  background: transparent;
}

.dropdown-item:hover {
  background: var(--bg-surface);
  color: var(--color-primary);
  transform: translateX(3px);
}

.dropdown-item-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.dropdown-item-info {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.dropdown-item-title {
  font-weight: 700;
  font-size: 0.875rem;
  line-height: 1.2;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.dropdown-item-badge {
  font-size: 0.65rem;
  padding: 1px 6px;
  border-radius: 999px;
  font-weight: 800;
}

.dropdown-item-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
  line-height: 1.3;
}

/* Mobile dropdown */
.mobile-dropdown-group {
  margin: 0.5rem 0;
  border-left: 2px solid var(--border-color);
  padding-left: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.mobile-dropdown-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 800;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

/* ==========================================================================
   Blog Layout & Post Cards
   ========================================================================== */
.blog-hero {
  padding: 8.5rem 0 3.5rem;
  text-align: center;
  position: relative;
}

.blog-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 2.5rem 0 3rem;
}

.blog-filter-btn {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.45rem 1rem;
  border-radius: 999px;
  font-size: 0.825rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.blog-filter-btn:hover {
  color: var(--text-main);
  border-color: var(--color-primary);
}

.blog-filter-btn.active {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
  font-weight: 700;
}

.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 5rem;
}

@media (min-width: 768px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.blog-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(59, 130, 246, 0.35);
}

.blog-card-header {
  height: 180px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.blog-card-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 999px;
  backdrop-filter: blur(8px);
}

.blog-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.blog-date {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.blog-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.blog-excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex: 1;
}

.blog-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
}

.blog-author {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-main);
  font-weight: 600;
}

.blog-author-avatar {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
}

.blog-read-more {
  color: var(--color-primary);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: transform 0.2s ease;
}

.blog-card:hover .blog-read-more {
  transform: translateX(4px);
}