/* ==========================================================================
   НСТ (Новые Строительные Технологии) — Строгий корпоративный бизнес-стиль
   ========================================================================== */

:root {
  --primary: #0284c7;         /* Индустриальный синий */
  --primary-hover: #0369a1;
  --primary-dark: #0f172a;    /* Глубокий графит для контрастных блоков */
  --primary-light: #f0f9ff;
  --accent: #f97316;          /* Яркий сигнал действия (оранжевый) */
  --accent-hover: #ea580c;
  --accent-light: #fff7ed;
  
  --text-main: #1e293b;       /* Четкий читаемый текст */
  --text-muted: #64748b;
  --text-light: #f8fafc;
  
  --bg-body: #ffffff;
  --bg-alt: #f8fafc;
  --bg-card: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #38bdf8;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --shadow-hover: 0 20px 30px -10px rgba(2,132,199,0.15);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  color: var(--text-main);
  background-color: var(--bg-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* Контейнеры и сетка */
.container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

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

.section-dark {
  background-color: var(--primary-dark);
  color: var(--text-light);
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 50px auto;
}

.section-badge {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background-color: var(--primary-light);
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-dark .section-title {
  color: #ffffff;
}

.section-subtitle {
  font-size: 1.12rem;
  color: var(--text-muted);
}

.section-dark .section-subtitle {
  color: #94a3b8;
}

/* Кнопки */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.98rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  gap: 8px;
  text-align: center;
}

.btn-primary {
  background-color: var(--accent);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(249, 115, 22, 0.35);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(249, 115, 22, 0.45);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--primary-hover);
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--bg-alt);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-outline-white {
  background-color: transparent;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.88rem;
}

/* Верхняя полоса контактов */
.top-bar {
  background-color: #0f172a;
  color: #94a3b8;
  font-size: 0.84rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.top-bar-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Главная навигация */
.navbar {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  padding: 8px 0;
}

.logo-block {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-block img {
  height: 56px;
  width: auto;
  object-fit: contain;
  display: block;
}

.logo-text-group {
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 290px;
}

.logo-brand {
  font-weight: 900;
  font-size: 1.28rem;
  color: var(--text-main);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 3px;
}

.logo-sub {
  font-size: 0.67rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.25;
}

.nav-links {
  display: flex;
  gap: 22px;
  align-items: center;
}

.nav-link {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-main);
  position: relative;
  padding: 8px 0;
  white-space: nowrap;
}

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

.nav-contacts {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-shrink: 0;
  margin-left: 36px;
}

.nav-phone-group {
  display: flex;
  flex-direction: column;
  text-align: right;
  white-space: nowrap;
  padding-left: 16px;
  border-left: 1px solid var(--border-color);
}

.nav-phone {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  white-space: nowrap;
  letter-spacing: -0.01em;
  display: block;
}

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

.nav-status {
  font-size: 0.74rem;
  color: #16a34a;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #16a34a;
  display: inline-block;
}

/* Мобильная кнопка меню */
.burger-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.burger-icon {
  width: 26px;
  height: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.burger-icon span {
  width: 100%;
  height: 3px;
  background-color: var(--text-main);
  border-radius: 3px;
  transition: var(--transition);
}

/* Первый экран (Hero) */
.hero {
  position: relative;
  padding: 90px 0 80px 0;
  background: linear-gradient(135deg, #f8fafc 0%, #edf7fd 100%);
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 40px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: #ffffff;
  border: 1px solid #bae6fd;
  color: var(--primary);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 22px;
}

.hero-title span {
  color: var(--primary);
  display: block;
}

.hero-desc {
  font-size: 1.18rem;
  color: #475569;
  line-height: 1.6;
  margin-bottom: 32px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  border-top: 1px solid #cbd5e1;
  padding-top: 24px;
}

.hero-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.feature-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: #e0f2fe;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: bold;
  flex-shrink: 0;
}

.feature-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.35;
}

/* Форма первого экрана */
.hero-card {
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  position: relative;
}

.card-ribbon {
  position: absolute;
  top: -12px;
  right: 24px;
  background-color: var(--accent);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 10px rgba(249, 115, 22, 0.3);
}

.hero-form-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}

.hero-form-subtitle {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

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

.form-label {
  display: block;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid #cbd5e1;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-main);
  background-color: #f8fafc;
  transition: var(--transition);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  background-color: #ffffff;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.form-privacy {
  font-size: 0.76rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-top: 14px;
  text-align: center;
}

/* Метрики (Цифры компании) */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: -40px;
  position: relative;
  z-index: 10;
}

.metric-card {
  background-color: #ffffff;
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition);
}

.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.metric-val {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}

.metric-title {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.metric-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Карточки услуг */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.service-card {
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: #7dd3fc;
}

.service-img-wrapper {
  position: relative;
  height: 220px;
  overflow: hidden;
  background-color: #e2e8f0;
}

.service-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.service-card:hover .service-img {
  transform: scale(1.06);
}

.service-price-badge {
  position: absolute;
  bottom: 14px;
  left: 14px;
  background-color: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(4px);
  color: #ffffff;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.92rem;
  border-left: 3px solid var(--accent);
}

.service-body {
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.service-title {
  font-size: 1.28rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-main);
  margin-bottom: 12px;
}

.service-desc {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 20px;
}

.service-features {
  margin-bottom: 24px;
  margin-top: auto;
}

.service-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: #334155;
  margin-bottom: 8px;
}

.service-feature svg {
  color: var(--primary);
  flex-shrink: 0;
}

.service-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Преимущества компании */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.advantage-card {
  background-color: #ffffff;
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.advantage-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.advantage-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.advantage-title {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}

.advantage-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Портфолио и Сравнение До/После */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.portfolio-card {
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.portfolio-media {
  position: relative;
  height: 300px;
  background-color: #0f172a;
}

.portfolio-single-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Сравнение До/После в карточке */
.compare-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: 100%;
  position: relative;
}

.compare-pane {
  position: relative;
  height: 100%;
  overflow: hidden;
}

.compare-pane img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.compare-tag {
  position: absolute;
  top: 14px;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #ffffff;
  z-index: 2;
}

.compare-tag.before {
  left: 14px;
  background-color: rgba(239, 68, 68, 0.85);
}

.compare-tag.after {
  right: 14px;
  background-color: rgba(34, 197, 94, 0.9);
}

.portfolio-details {
  padding: 24px;
}

.portfolio-cat {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.portfolio-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}

.portfolio-meta {
  display: flex;
  gap: 16px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.portfolio-desc {
  font-size: 0.92rem;
  color: #475569;
  line-height: 1.5;
}

/* Квиз / Интерактивный калькулятор */
.quiz-section {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  padding: 90px 0;
  border-radius: var(--radius-lg);
  margin: 40px 0;
}

.quiz-wrapper {
  max-width: 820px;
  margin: 0 auto;
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 44px;
  backdrop-filter: blur(10px);
}

.quiz-progress-bar {
  width: 100%;
  height: 8px;
  background-color: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  margin-bottom: 30px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  width: 25%;
  background-color: var(--accent);
  transition: width 0.35s ease;
}

.quiz-step {
  display: none;
}

.quiz-step.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

.quiz-q-title {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 24px;
  line-height: 1.35;
}

.quiz-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 32px;
}

.quiz-opt-btn {
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  color: #ffffff;
  text-align: left;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
}

.quiz-opt-btn:hover, .quiz-opt-btn.selected {
  background-color: var(--primary);
  border-color: #38bdf8;
  transform: translateY(-2px);
}

.quiz-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Футер */
.footer {
  background-color: #0b1120;
  color: #94a3b8;
  padding: 70px 0 30px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-title {
  color: #ffffff;
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.84rem;
}

/* Модальное окно */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  max-width: 480px;
  width: 100%;
  padding: 36px 32px;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
}

/* Стили панели управления (Админки) */
.admin-login-body {
  background-color: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.login-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
}

.admin-header {
  background-color: #0f172a;
  color: #ffffff;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.admin-main {
  padding: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.admin-tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
}

.admin-tab-btn {
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  background: #ffffff;
  border: 1px solid var(--border-color);
  font-weight: 600;
  cursor: pointer;
}

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

.json-editor {
  width: 100%;
  height: 520px;
  font-family: monospace;
  font-size: 0.95rem;
  padding: 18px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  line-height: 1.45;
}

.alert-success {
  background-color: #dcfce7;
  color: #15803d;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-weight: 600;
}

.alert-danger {
  background-color: #fee2e2;
  color: #b91c1c;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-weight: 600;
}

/* Анимации */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Медиа-запросы (Адаптив Mobile-First / Responsive)
   ========================================================================== */
@media (max-width: 1200px) {
  .nav-links {
    gap: 14px;
  }
  .nav-contacts {
    margin-left: 16px;
    gap: 16px;
  }
}

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .services-grid, .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .top-bar {
    display: none;
  }
  .nav-links, .nav-phone-group {
    display: none;
  }
  .burger-btn {
    display: block;
  }
  
  .nav-mobile-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    background-color: #ffffff;
    padding: 24px;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--border-color);
    gap: 16px;
  }

  .hero-title {
    font-size: 2.2rem;
  }
  .hero-features {
    grid-template-columns: 1fr;
  }
  .services-grid, .advantages-grid, .portfolio-grid {
    grid-template-columns: 1fr;
  }
  .metrics-grid {
    grid-template-columns: 1fr;
    margin-top: 20px;
  }
  .quiz-options {
    grid-template-columns: 1fr;
  }
  .quiz-wrapper {
    padding: 24px 18px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}