:root {
  --bg-color: #f8f9fa;
  --bg-card: #ffffff;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --border-color: #e5e7eb;
  --border-hover: #d1d5db;
  --primary-color: #c465d3;
  --primary-hover: #a84eb8;
  --accent-color: rgba(196, 101, 211, 0.08);
  --header-bg: rgba(255, 255, 255, 0.85);
  --btn-text: #ffffff;
  --success-color: #10b981;
}

[data-theme="dark"] {
  --bg-color: #050505;
  --bg-card: #121212;
  --text-primary: #f9fafb;
  --text-secondary: #a1a1aa;
  --border-color: #27272a;
  --border-hover: #3f3f46;
  --primary-color: #c465d3;
  --primary-hover: #d17be0;
  --accent-color: rgba(196, 101, 211, 0.12);
  --header-bg: rgba(5, 5, 5, 0.85);
  --btn-text: #ffffff;
  --success-color: #10b981;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  transition: background-color 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.logo img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: cover;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

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

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.theme-toggle:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
  z-index: 101;
}

/* Hero Section */
.hero {
  max-width: 800px;
  margin: 4rem auto 3rem;
  text-align: center;
  padding: 0 1.5rem;
  animation: fadeIn 0.6s ease-out;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  line-height: 1.1;
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* Advantages */
.advantages {
  max-width: 1200px;
  margin: 0 auto 5rem;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.adv-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.adv-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary-color);
}

.adv-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background-color: var(--accent-color);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.adv-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.adv-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Filters */
.filters-section {
  max-width: 1200px;
  margin: 0 auto 2rem;
  padding: 0 1.5rem;
}

.filters-container {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  background-color: var(--bg-card);
  padding: 1.25rem;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  align-items: center;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.filter-group label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
}

.filter-controls {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover {
  border-color: var(--border-hover);
}

.filter-btn.active {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--btn-text);
}

.price-range {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.price-input {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.6rem 1rem;
  border-radius: 8px;
  width: 110px;
  font-size: 0.9rem;
  font-family: inherit;
}

.price-input:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Main Content */
.main-content {
  max-width: 1200px;
  margin: 0 auto 5rem;
  padding: 0 1.5rem;
}

.category-section {
  margin-bottom: 4rem;
  animation: fadeIn 0.4s ease-out;
}

.category-header {
  margin-bottom: 2rem;
}

.category-header h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.category-audience {
  display: inline-block;
  background: var(--accent-color);
  color: var(--primary-color);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.category-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 800px;
  margin-bottom: 0.5rem;
}

.category-panel {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.category-panel a {
  color: var(--text-primary);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--border-color);
}

.category-panel a:hover {
  color: var(--primary-color);
  text-decoration-color: var(--primary-color);
}

.tariffs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* Tariffs Card Tweaks for less visual load at top (cleaner header) */
.tariff-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.tariff-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-color);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .tariff-card:hover {
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.tariff-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tariff-price {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.tariff-price span.currency {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color);
}

.tariff-price span.month {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.tariff-old-price {
  font-size: 1.1rem;
  text-decoration: line-through;
  color: var(--text-secondary);
  font-weight: 500;
  margin-left: auto;
}

.specs-list {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.specs-list li {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
}

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

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

.spec-value {
  font-weight: 600;
  color: var(--text-primary);
  text-align: right;
}

.btn-order {
  display: flex;
  width: 100%;
  padding: 0.8rem;
  background-color: var(--primary-color);
  color: var(--btn-text);
  justify-content: center;
  align-items: center;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  transition: background-color 0.2s ease;
}

.btn-order:hover {
  background-color: var(--primary-hover);
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-card);
  padding: 4rem 1.5rem;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--text-secondary);
  transition: color 0.2s;
  font-weight: 500;
}

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

.footer-copy {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Mobile Fixes */
@media (max-width: 768px) {
  .header-container {
    flex-direction: row;
    padding: 1rem 1.5rem;
    gap: 0;
  }

  .logo {
    width: auto;
  }

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

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 1.5rem;
    align-items: flex-start;

    transform: translateY(-150%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links a {
    width: 100%;
    padding: 0.5rem 0;
    font-size: 1.1rem;
    border-bottom: 1px dashed var(--border-color);
  }

  .nav-links a:last-of-type {
    border-bottom: none;
  }

  .theme-toggle {
    width: 100%;
    justify-content: center;
    padding: 0.75rem;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .filters-container {
    flex-direction: column;
    align-items: stretch;
  }

  .price-range {
    justify-content: space-between;
  }

  .price-input {
    width: 48%;
  }

  /* Reset margins for mobile */
  .hero {
    margin-top: 2rem;
    margin-bottom: 2rem;
  }

  .advantages {
    margin-bottom: 3rem;
  }
}