:root {
  --primary-color: #2563EB;
  --secondary-color: #3B82F6;
  --accent-color: #60A5FA;
  --success-color: #16A34A;
  --warning-color: #EA580C;
  --error-color: #DC2626;
  --info-color: #0284C7;
  --neutral-color: #F8FAFC;
  --text-color: #0F172A;
  --background-white: #ffffff;
  --border-color: #E2E8F0;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-600: #475569;
  --gray-800: #1E293B;
  --container-max-width: 1140px;
  --gutter: 1.5rem;
  --base-font-size: 16px;
  --line-height: 1.5;
}

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

html {
  font-size: var(--base-font-size);
  scroll-behavior: smooth;
}

body {
  font-family: 'Roboto', system-ui, -apple-system, sans-serif;
  line-height: var(--line-height);
  color: var(--text-color);
  background: var(--background-white);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.441rem;
}

h2 {
  font-size: 1.953rem;
}

h3 {
  font-size: 1.563rem;
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1rem;
}

h6 {
  font-size: 0.875rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

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

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

.container-fluid {
  width: 100%;
  padding: 0 var(--gutter);
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(var(--gutter) / -2);
}

.col-1 { width: 8.333%; }
.col-2 { width: 16.666%; }
.col-3 { width: 25%; }
.col-4 { width: 33.333%; }
.col-5 { width: 41.666%; }
.col-6 { width: 50%; }
.col-7 { width: 58.333%; }
.col-8 { width: 66.666%; }
.col-9 { width: 75%; }
.col-10 { width: 83.333%; }
.col-11 { width: 91.666%; }
.col-12 { width: 100%; }

[class*="col-"] {
  padding: 0 calc(var(--gutter) / 2);
}

.navbar {
  background: var(--background-white);
  padding: 1rem 0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.logo:hover {
  color: var(--secondary-color);
}

.main-nav {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin: 0 1rem;
}

.nav-link {
  color: var(--text-color);
  font-weight: 500;
  padding: 0.5rem;
  display: block;
  transition: color 0.3s ease;
}

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

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-color);
  cursor: pointer;
}

.header-main {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--background-white);
  padding: 4rem 0;
  text-align: center;
}

.header-main h1 {
  margin-bottom: 1.5rem;
  color: var(--background-white);
}

.header-main p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.primary-banner {
  background: var(--neutral-color);
  padding: 3rem 0;
}

.intro-section {
  padding: 4rem 0;
  background: var(--background-white);
}

.main-feature {
  display: flex;
  align-items: center;
  padding: 3rem 0;
}

.content-section {
  padding: 4rem 0;
}

.info-block {
  background: var(--background-white);
  padding: 3rem 0;
}

.data-area {
  padding: 2rem 0;
}

.content-zone {
  margin: 2rem 0;
}

.info-card {
  background: var(--background-white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 1.5rem;
  transition: box-shadow 0.3s ease;
}

.info-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.detail-box {
  background: var(--gray-100);
  padding: 1.5rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}

.content-panel {
  background: var(--background-white);
  border-left: 4px solid var(--primary-color);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.info-tile {
  background: var(--neutral-color);
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
}

.action-button {
  display: inline-block;
  background: var(--primary-color);
  color: var(--background-white);
  padding: 12px 24px;
  border-radius: 6px;
  border: none;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.3s ease;
}

.action-button:hover {
  background: var(--secondary-color);
  color: var(--background-white);
}

.primary-cta {
  background: var(--primary-color);
  color: var(--background-white);
  padding: 14px 32px;
  border-radius: 8px;
  border: none;
  font-size: 1.125rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.2s ease;
}

.primary-cta:hover {
  background: var(--secondary-color);
  color: var(--background-white);
  transform: translateY(-2px);
}

.submit-btn {
  background: var(--primary-color);
  color: var(--background-white);
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.3s ease;
}

.submit-btn:hover {
  background: var(--secondary-color);
  color: var(--background-white);
}

.main-action {
  display: inline-block;
  background: var(--accent-color);
  color: var(--text-color);
  padding: 12px 28px;
  border-radius: 6px;
  font-weight: 500;
  border: 2px solid var(--accent-color);
  transition: all 0.3s ease;
}

.main-action:hover {
  background: transparent;
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.layout-system {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.flex-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

.grid-layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gutter);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-color);
}

.form-control {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
}

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

.form-select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--background-white);
  cursor: pointer;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
}

.gallery-item img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.testimonial-card {
  background: var(--background-white);
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  margin-bottom: 1.5rem;
}

.testimonial-card p {
  font-style: italic;
  margin-bottom: 1rem;
  color: var(--gray-600);
}

.testimonial-author {
  font-weight: 700;
  color: var(--text-color);
}

.pricing-card {
  background: var(--background-white);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  transition: border-color 0.3s ease;
}

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

.pricing-card.featured {
  border-color: var(--primary-color);
  background: var(--neutral-color);
}

.price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 1rem 0;
}

.price-list {
  list-style: none;
  margin: 1.5rem 0;
  padding: 0;
}

.price-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--gray-200);
}

.team-member {
  text-align: center;
  margin-bottom: 2rem;
}

.team-member img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 1rem;
}

.team-member h4 {
  margin-bottom: 0.5rem;
}

.team-member p {
  color: var(--gray-600);
  margin-bottom: 0.5rem;
}

.blog-card {
  background: var(--background-white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  margin-bottom: 2rem;
}

.blog-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.blog-content {
  padding: 1.5rem;
}

.blog-content h3 {
  margin-bottom: 0.75rem;
}

.blog-meta {
  color: var(--gray-600);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.faq-item {
  background: var(--background-white);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-question {
  padding: 1.25rem;
  font-weight: 700;
  cursor: pointer;
  background: var(--gray-100);
  transition: background 0.3s ease;
}

.faq-question:hover {
  background: var(--gray-200);
}

.faq-answer {
  padding: 1.25rem;
  display: none;
}

.faq-answer.active {
  display: block;
}

.footer {
  background: var(--gray-800);
  color: var(--background-white);
  padding: 3rem 0 1.5rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer h4 {
  color: var(--background-white);
  margin-bottom: 1rem;
}

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--gray-300);
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--gray-600);
  color: var(--gray-300);
}

.text-center {
  text-align: center;
}

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

.text-right {
  text-align: right;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.pt-1 { padding-top: 0.5rem; }
.pt-2 { padding-top: 1rem; }
.pt-3 { padding-top: 1.5rem; }
.pt-4 { padding-top: 2rem; }
.pt-5 { padding-top: 3rem; }

.pb-1 { padding-bottom: 0.5rem; }
.pb-2 { padding-bottom: 1rem; }
.pb-3 { padding-bottom: 1.5rem; }
.pb-4 { padding-bottom: 2rem; }
.pb-5 { padding-bottom: 3rem; }

.d-none {
  display: none;
}

.d-block {
  display: block;
}

.d-flex {
  display: flex;
}

.d-grid {
  display: grid;
}

@media screen and (max-width: 992px) {
  .col-md-1 { width: 8.333%; }
  .col-md-2 { width: 16.666%; }
  .col-md-3 { width: 25%; }
  .col-md-4 { width: 33.333%; }
  .col-md-5 { width: 41.666%; }
  .col-md-6 { width: 50%; }
  .col-md-7 { width: 58.333%; }
  .col-md-8 { width: 66.666%; }
  .col-md-9 { width: 75%; }
  .col-md-10 { width: 83.333%; }
  .col-md-11 { width: 91.666%; }
  .col-md-12 { width: 100%; }

  .content-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }

  .flex-container {
    flex-direction: column;
  }
}

@media screen and (max-width: 768px) {
  .col-sm-1 { width: 8.333%; }
  .col-sm-2 { width: 16.666%; }
  .col-sm-3 { width: 25%; }
  .col-sm-4 { width: 33.333%; }
  .col-sm-5 { width: 41.666%; }
  .col-sm-6 { width: 50%; }
  .col-sm-7 { width: 58.333%; }
  .col-sm-8 { width: 66.666%; }
  .col-sm-9 { width: 75%; }
  .col-sm-10 { width: 83.333%; }
  .col-sm-11 { width: 91.666%; }
  .col-sm-12 { width: 100%; }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.5rem;
  }

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

  .main-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    position: absolute;
    top: 60px;
    left: 0;
    background: var(--background-white);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
  }

  .main-nav.active {
    display: flex;
  }

  .nav-item {
    margin: 0;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-link {
    padding: 1rem 1.5rem;
  }

  .header-main {
    padding: 3rem 0;
  }

  .header-main h1 {
    font-size: 2rem;
  }

  .header-main p {
    font-size: 1rem;
  }

  .content-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media screen and (max-width: 576px) {
  [class*="col-"] {
    width: 100%;
  }

  .container {
    padding: 0 1rem;
  }

  .header-main {
    padding: 2rem 0;
  }

  .content-section {
    padding: 2rem 0;
  }

  .info-card {
    padding: 1.5rem;
  }

  .action-button,
  .primary-cta {
    width: 100%;
    text-align: center;
  }

  .team-member img {
    width: 150px;
    height: 150px;
  }
}