/* =============================================
   TrustKeys Network - Landing Page Styles
   Dark/Light Mode with CSS Custom Properties
   ============================================= */

/* --- CSS Custom Properties (Light Theme - Default) --- */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fc;
  --bg-tertiary: #eef1f6;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f4ff;
  --bg-nav: rgba(255, 255, 255, 0.92);
  --text-primary: #1a1d29;
  --text-secondary: #4a5068;
  --text-muted: #7a7f96;
  --border-color: #e2e6ef;
  --border-light: #f0f2f7;
  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-blue-light: rgba(37, 99, 235, 0.08);
  --accent-orange: #f97316;
  --accent-orange-hover: #ea580c;
  --accent-green: #10b981;
  --accent-purple: #8b5cf6;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
  --gradient-hero: linear-gradient(135deg, #f8f9fc 0%, #e8ecf8 100%);
  --gradient-cta: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* --- Dark Theme --- */
[data-theme="dark"] {
  --bg-primary: #0f1117;
  --bg-secondary: #161822;
  --bg-tertiary: #1e2130;
  --bg-card: #1a1d2b;
  --bg-card-hover: #232740;
  --bg-nav: rgba(15, 17, 23, 0.92);
  --text-primary: #f0f2f7;
  --text-secondary: #b0b5c9;
  --text-muted: #6b7194;
  --border-color: #2a2e3f;
  --border-light: #1e2130;
  --accent-blue: #3b82f6;
  --accent-blue-hover: #60a5fa;
  --accent-blue-light: rgba(59, 130, 246, 0.12);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.3);
  --gradient-hero: linear-gradient(135deg, #0f1117 0%, #161822 100%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-blue-hover);
  text-decoration: none;
}

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

/* --- Container --- */
.tk-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */
.tk-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.tk-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.tk-nav-logo img {
  height: 36px;
  width: auto;
}

.tk-nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tk-nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 8px;
  transition: color 0.2s, background-color 0.2s;
}

.tk-nav-links a:hover {
  color: var(--text-primary);
  background-color: var(--accent-blue-light);
}

.tk-nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Theme Toggle */
.tk-theme-toggle {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all 0.2s ease;
}

.tk-theme-toggle:hover {
  background: var(--bg-card-hover);
  color: var(--accent-blue);
}

.tk-theme-toggle .icon-sun,
.tk-theme-toggle .icon-moon {
  display: none;
}

[data-theme="light"] .tk-theme-toggle .icon-moon,
:root:not([data-theme]) .tk-theme-toggle .icon-moon {
  display: block;
}

[data-theme="dark"] .tk-theme-toggle .icon-sun {
  display: block;
}

/* Mobile Menu */
.tk-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-primary);
}

.tk-hamburger svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.tk-mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  z-index: 999;
  padding: 24px;
  overflow-y: auto;
}

.tk-mobile-menu.active {
  display: block;
}

.tk-mobile-menu a {
  display: block;
  padding: 14px 0;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 500;
  border-bottom: 1px solid var(--border-color);
}

/* --- Buttons --- */
.tk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  line-height: 1.4;
}

.tk-btn-primary {
  background: var(--gradient-cta);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.tk-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
  color: #ffffff;
}

.tk-btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.tk-btn-outline:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: var(--accent-blue-light);
}

.tk-btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
  border-radius: 8px;
}

.tk-btn-nav {
  padding: 8px 20px;
  font-size: 0.85rem;
  border-radius: 8px;
  background: var(--accent-blue);
  color: #fff;
}

.tk-btn-nav:hover {
  background: var(--accent-blue-hover);
  color: #fff;
}

/* --- Hero Section --- */
.tk-hero {
  padding: 140px 0 80px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.tk-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.tk-hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.tk-hero h1 .tk-gradient-text {
  background: var(--gradient-cta);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tk-hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 520px;
  line-height: 1.7;
}

.tk-hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.tk-hero-image {
  position: relative;
  text-align: center;
}

.tk-hero-image img {
  max-width: 100%;
  border-radius: 16px;
  filter: drop-shadow(0 20px 60px rgba(0,0,0,0.15));
}

.tk-trust-badges {
  display: flex;
  gap: 16px;
  align-items: center;
}

.tk-trust-badges a img {
  height: 44px;
  width: auto;
  border-radius: 8px;
  transition: transform 0.2s;
}

.tk-trust-badges a:hover img {
  transform: scale(1.05);
}

/* --- Section Base --- */
.tk-section {
  padding: 100px 0;
}

.tk-section-alt {
  background: var(--bg-secondary);
}

.tk-section-header {
  text-align: center;
  margin-bottom: 64px;
}

.tk-section-header .tk-label {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--accent-blue-light);
  color: var(--accent-blue);
  margin-bottom: 16px;
}

.tk-section-header h2 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.tk-section-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* --- Products Section (Two Pillars) --- */
.tk-products-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.tk-pillar {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 40px;
  transition: all 0.3s ease;
}

.tk-pillar:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.tk-pillar-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.tk-pillar-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.tk-pillar-icon.blue {
  background: rgba(37, 99, 235, 0.1);
  color: var(--accent-blue);
}

.tk-pillar-icon.orange {
  background: rgba(249, 115, 22, 0.1);
  color: var(--accent-orange);
}

.tk-pillar-header h3 {
  font-size: 1.4rem;
  font-weight: 700;
}

.tk-pillar-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
}

.tk-pillar-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
}

.tk-pillar-list li:last-child {
  border-bottom: none;
}

.tk-pillar-list .tk-check {
  color: var(--accent-green);
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 2px;
}

/* --- Features Grid --- */
.tk-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tk-feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  transition: all 0.3s ease;
}

.tk-feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-blue);
}

.tk-feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.5rem;
  background: var(--accent-blue-light);
  color: var(--accent-blue);
}

.tk-feature-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.tk-feature-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* --- App Showcase --- */
.tk-showcase {
  position: relative;
}

.tk-showcase-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.tk-showcase-tab {
  padding: 10px 24px;
  border-radius: 10px;
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.tk-showcase-tab:hover,
.tk-showcase-tab.active {
  background: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-blue);
}

.tk-showcase-images {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.tk-showcase-phone {
  width: 240px;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: all 0.4s ease;
  display: none;
}

.tk-showcase-phone.active {
  display: block;
  animation: fadeInUp 0.4s ease;
}

.tk-showcase-phone img {
  width: 100%;
  display: block;
}

/* --- Press / Social Proof --- */
.tk-press-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.tk-press-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 28px;
  text-align: center;
  transition: all 0.2s ease;
}

.tk-press-card:hover {
  box-shadow: var(--shadow-md);
}

.tk-press-card .tk-press-name {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.tk-press-card p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* Testimonials */
.tk-testimonials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tk-testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  transition: all 0.3s ease;
}

.tk-testimonial-card:hover {
  box-shadow: var(--shadow-md);
}

.tk-testimonial-card blockquote {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.tk-testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tk-testimonial-author .tk-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-cta);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
}

.tk-testimonial-author h5 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.tk-testimonial-author span {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* --- Download CTA --- */
.tk-download {
  background: var(--gradient-cta);
  border-radius: 24px;
  padding: 64px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.tk-download h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: #ffffff;
}

.tk-download p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.tk-download-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.tk-download-buttons a img {
  height: 52px;
  border-radius: 10px;
  transition: transform 0.2s;
}

.tk-download-buttons a:hover img {
  transform: scale(1.05);
}

.tk-download-web {
  margin-top: 16px;
}

.tk-download-web a {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}

.tk-download-web a:hover {
  color: #fff;
  border-bottom-color: #fff;
}

/* --- Footer --- */
.tk-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 64px 0 32px;
}

.tk-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.tk-footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 16px 0 20px;
  max-width: 300px;
}

.tk-footer-socials {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tk-footer-socials a {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1rem;
  transition: all 0.2s ease;
}

.tk-footer-socials a:hover {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
}

.tk-footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.tk-footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 6px 0;
  transition: color 0.2s;
}

.tk-footer-col a:hover {
  color: var(--accent-blue);
}

.tk-footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.tk-footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tk-fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.tk-fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays */
.tk-delay-1 { transition-delay: 0.1s; }
.tk-delay-2 { transition-delay: 0.2s; }
.tk-delay-3 { transition-delay: 0.3s; }
.tk-delay-4 { transition-delay: 0.4s; }
.tk-delay-5 { transition-delay: 0.5s; }

/* --- Responsive --- */
@media (max-width: 991px) {
  .tk-nav-links {
    display: none;
  }

  .tk-hamburger {
    display: flex;
  }

  .tk-hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .tk-hero h1 {
    font-size: 2.4rem;
  }

  .tk-hero p {
    margin: 0 auto 32px;
  }

  .tk-hero-buttons {
    justify-content: center;
  }

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

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

  .tk-press-grid {
    grid-template-columns: 1fr 1fr;
  }

  .tk-testimonials {
    grid-template-columns: 1fr;
  }

  .tk-footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .tk-trust-badges {
    justify-content: center;
  }
}

@media (max-width: 575px) {
  .tk-hero {
    padding: 120px 0 60px;
    min-height: auto;
  }

  .tk-hero h1 {
    font-size: 1.9rem;
  }

  .tk-section {
    padding: 64px 0;
  }

  .tk-section-header h2 {
    font-size: 1.8rem;
  }

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

  .tk-press-grid {
    grid-template-columns: 1fr;
  }

  .tk-pillar {
    padding: 28px;
  }

  .tk-download {
    padding: 40px 24px;
    border-radius: 16px;
  }

  .tk-download h2 {
    font-size: 1.6rem;
  }

  .tk-footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .tk-footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .tk-showcase-phone {
    width: 180px;
  }
}

/* --- Cookie Consent Banner --- */
.tk-cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.12);
  padding: 20px 0;
  transform: translateY(100%);
  transition: transform 0.4s ease;
}

.tk-cookie-banner.visible {
  transform: translateY(0);
}

.tk-cookie-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.tk-cookie-text strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.95rem;
}

.tk-cookie-text p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.5;
  margin: 0;
}

.tk-cookie-actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

@media (max-width: 575px) {
  .tk-cookie-inner {
    flex-direction: column;
    text-align: center;
  }

  .tk-cookie-actions {
    width: 100%;
    justify-content: center;
  }
}

/* --- Language Switcher --- */
.tk-lang-switcher {
  position: relative;
}

.tk-lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-sans);
  transition: all 0.2s ease;
}

.tk-lang-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.tk-lang-flag {
  font-size: 0.85rem;
}

.tk-lang-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  min-width: 170px;
  padding: 6px;
  z-index: 1001;
}

.tk-lang-dropdown.open {
  display: block;
  animation: fadeInUp 0.2s ease;
}

.tk-lang-option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  border: none;
  background: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.15s ease;
}

.tk-lang-option:hover {
  background: var(--accent-blue-light);
  color: var(--accent-blue);
}

.tk-lang-option.active {
  background: var(--accent-blue-light);
  color: var(--accent-blue);
  font-weight: 600;
}

/* --- Utility --- */
.tk-text-gradient {
  background: var(--gradient-cta);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Partners section */
.tk-partners {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
  opacity: 0.6;
  transition: opacity 0.3s;
}

.tk-partners:hover {
  opacity: 1;
}

.tk-partners img {
  height: 40px;
  width: auto;
  filter: grayscale(100%);
  transition: filter 0.3s;
}

.tk-partners img:hover {
  filter: grayscale(0%);
}

[data-theme="dark"] .tk-partners img {
  filter: grayscale(100%) brightness(1.5);
}

[data-theme="dark"] .tk-partners img:hover {
  filter: grayscale(0%) brightness(1.2);
}