:root {
  --primary-color: #1e3a8a;
  --secondary-color: #3b82f6;
  --accent-color: #ff7a00;
  --text-color: #1f2937;
  --light-bg: #f8f9fa;
  --white: #ffffff;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  color: var(--text-color);
  background: var(--light-bg);
}

.main-header {
  background: var(--primary-color);
  background-image: url('img/main-img.jpg');
  background-size: cover;
  background-position: center;
  color: var(--white);
  padding: 2rem;
  position: relative;
}

.main-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
}

.header-content {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 0;
}

.header-left h1 {
  font-size: 2.5rem;
  margin: 0;
  line-height: 1.2;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.header-left .subtitle {
  font-size: 2rem;
  display: block;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.5rem;
  background: linear-gradient(45deg, var(--accent-color), var(--white));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-left .title {
  font-size: 2.5rem;
  display: block;
  font-weight: 900;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.header-right {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link {
  color: var(--white);
  text-decoration: none;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.3s ease;
}

.contact-link:hover {
  transform: scale(1.05);
}

nav {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
  gap: 2rem;
  padding: 1rem 0;
}

.nav-button {
  background: var(--accent-color);
  color: var(--white);
  padding: 1rem 2rem;
  text-decoration: none;
  border-radius: 30px;
  font-weight: bold;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-button:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.nav-button[href="#form"] {
  animation: pulse 2s infinite;
}

.fractions-section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.fraction-items {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.fraction-item {
  background: var(--white);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
}

.fraction-item:hover {
  transform: translateY(-5px);
}

.fraction-content {
  display: flex;
  align-items: center;
  padding: 2rem;
  gap: 2rem;
}

.fraction-text {
  flex: 2;
}

.fraction-text h3 {
  color: var(--primary-color);
  margin-top: 0;
}

.fraction-image {
  flex: 1;
  position: relative;
}

.fraction-image img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 50%;
  border: 5px solid var(--accent-color);
}

.calculator {
  background: var(--white);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: var(--shadow);
  max-width: 800px;
  margin: 2rem auto;
}

.calc-group {
  margin-bottom: 2rem;
}

.calc-group h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.fraction-buttons,
.volume-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.fraction-btn,
.volume-btn {
  background: var(--light-bg);
  color: var(--text-color);
  padding: 1rem;
  border: 2px solid #e5e7eb;
  border-radius: 8px;
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.fraction-btn:hover,
.volume-btn:hover {
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.fraction-btn.active,
.volume-btn.active {
  background: var(--accent-color);
  color: var(--white);
  border-color: var(--accent-color);
}

.calc-result {
  margin-top: 2rem;
  padding: 1.5rem;
  border-radius: 8px;
  background-color: var(--light-bg);
  text-align: center;
  transition: all 0.3s ease;
}

.price-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.price-result h3 {
  color: var(--primary-color);
  margin: 0;
  font-size: 1.2rem;
}

.price-result .price {
  font-size: 2rem;
  font-weight: bold;
  color: var(--accent-color);
  margin: 0;
}

.price-result .details {
  color: var(--text-color);
  font-size: 1rem;
  margin: 0;
}

.contact-form {
  background: var(--white);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: var(--shadow);
  max-width: 600px;
  margin: 2rem auto;
}

.form-group {
  margin: 0 0 1.5rem;
}

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

.form-group .required {
  color: #dc2626;
  margin-left: 0.25rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 0.1rem;
  border: 2px solid #e5e7eb;
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.3s ease;
  background-color: var(--white);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%231e3a8a' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent-color);
  outline: none;
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #9ca3af;
}

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

.form-group input[type="number"] {
  -moz-appearance: textfield;
}

.form-group input[type="number"]::-webkit-outer-spin-button,
.form-group input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.contact-form button {
  width: 100%;
  padding: 1rem;
  background: var(--accent-color);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

.contact-form button:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

footer {
  background: var(--primary-color);
  color: var(--white);
  padding: 2rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.footer-contacts {
  display: flex;
  gap: 2rem;
}

.footer-contacts a {
  color: var(--white);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.3s ease;
}

.footer-contacts a:hover {
  color: var(--accent-color);
}

.footer-content p {
  margin: 0;
}

.footer-links {
  margin-top: 0.5rem;
}

.privacy-link {
  color: var(--white);
  text-decoration: none;
  transition: color 0.3s ease;
  font-size: 0.9rem;
}

.privacy-link:hover {
  color: var(--accent-color);
}

/* Location Section */
.location-section {
  padding: 4rem 2rem;
  background-color: var(--white);
}

.location-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 3rem;
  align-items: flex-start;
}

.location-info {
  flex: 1;
  padding: 2rem;
  background: var(--light-bg);
  border-radius: 15px;
  box-shadow: var(--shadow);
}

.address-block {
  margin-bottom: 2rem;
}

.address-block:last-child {
  margin-bottom: 0;
}

.address-block h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.address-block p {
  line-height: 1.6;
  color: var(--text-color);
}

.location-map {
  flex: 2;
  height: 400px;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

/* Section Titles */
.section-title {
  text-align: center;
  color: var(--primary-color);
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 3rem;
  position: relative;
  padding-bottom: 1rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: var(--accent-color);
  border-radius: 2px;
}

/* Advantages Section */
.advantages-section {
  padding: 4rem 2rem;
  background-color: var(--white);
}

.advantages-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: nowrap;
}

.advantage-item {
  flex: 1;
  text-align: center;
  padding: 1.5rem;
  background: var(--light-bg);
  border-radius: 15px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
}

.advantage-item:hover {
  transform: translateY(-10px);
}

.advantage-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1rem;
  background: var(--white);
  border-radius: 50%;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.advantage-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.advantage-item h3 {
  color: var(--primary-color);
  margin: 1rem 0 0.5rem;
  font-size: 1.2rem;
  font-weight: bold;
}

.advantage-item p {
  color: var(--text-color);
  margin: 0;
  font-size: 1rem;
}

/* Certificates Section */
.certificates-section {
  padding: 4rem 2rem;
  background-color: var(--light-bg);
}

.certificates-section h2 {
  text-align: center;
  margin-bottom: 3rem;
  color: var(--primary-color);
}

.certificates-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 1rem;
  flex-wrap: nowrap;
}

.certificate {
  flex: 1;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.certificate img {
  width: 100%;
  height: 200px;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  z-index: 1000;
  cursor: pointer;
}

.modal-content {
  position: relative;
  max-width: 90%;
  max-height: 90vh;
  margin: 2rem auto;
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal-content img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
}

/* Contacts Modal Styles */
.contacts-modal .modal-content {
  background: var(--white);
  padding: 2rem;
  border-radius: 15px;
  width: 90%;
  max-width: 600px;
  margin: 2rem auto;
  position: relative;
}

.contacts-info {
  padding: 1rem;
}

.contacts-info h2 {
  color: var(--primary-color);
  text-align: center;
  margin-bottom: 2rem;
  font-size: 1.8rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
  color: var(--text-color);
}

.contact-item i {
  color: var(--accent-color);
  font-size: 1.5rem;
  margin-top: 0.2rem;
}

.contact-item p {
  margin: 0;
}

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

.contact-item a:hover {
  color: var(--accent-color);
}

.contact-item .address {
  flex: 1;
}

.contact-item .address h3 {
  color: var(--primary-color);
  margin: 1rem 0 0.5rem;
  font-size: 1.1rem;
}

.contact-item .address p {
  margin-bottom: 1rem;
  line-height: 1.6;
}

.close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 2rem;
  color: var(--text-color);
  cursor: pointer;
  transition: color 0.3s ease;
}

.close-btn:hover {
  color: var(--accent-color);
}

/* Responsive Styles */
@media (max-width: 1200px) {
  .advantages-container {
    flex-wrap: wrap;
    justify-content: center;
  }

  .advantage-item {
    flex: 0 1 calc(33.333% - 2rem);
    min-width: 250px;
  }
}

@media (max-width: 992px) {
  .certificates-container {
    flex-wrap: wrap;
    justify-content: center;
  }

  .certificate {
    flex: 0 1 calc(33.333% - 1rem);
  }
}

@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 2rem;
  }

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

  .header-left .subtitle {
    font-size: 1.5rem;
  }
  
  .header-left .title {
    font-size: 2rem;
  }

  .fraction-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .footer-contacts {
    flex-direction: column;
    gap: 1rem;
  }

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

  .location-map {
    height: 300px;
  }

  .section-title {
    font-size: 1.5rem;
    margin-bottom: 2rem;
  }

  .advantage-item {
    flex: 0 1 calc(50% - 2rem);
  }

  .certificate {
    flex: 0 1 calc(50% - 1rem);
  }

  .calculator {
    padding: 1.5rem;
  }

  .fraction-buttons,
  .volume-buttons {
    grid-template-columns: 1fr;
  }

  .fraction-btn,
  .volume-btn {
    padding: 0.8rem;
    font-size: 0.9rem;
  }

  .price-result .price {
    font-size: 1.5rem;
  }

  .modal .close-btn {
    top: 0.5rem;
    right: 0.5rem;
    width: 2rem;
    height: 2rem;
    font-size: 1.2rem;
  }

  .contact-form {
    padding: 1.5rem;
  }
  
  .form-group input,
  .form-group textarea,
  .form-group select {
    padding: 0.75rem;
  }

  nav {
    padding: 1rem;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
  }

  .burger-menu {
    order: 1;
  }

  .nav-button[href="#form"] {
    order: 2;
    margin: 0 auto;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary-color);
    padding: 1rem;
    box-shadow: var(--shadow);
    width: 100%;
    order: 3;
  }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
  }

  .nav-links .nav-button {
    width: 100%;
    text-align: center;
    margin: 0;
    padding: 0.8rem;
    font-size: 0.9rem;
    white-space: nowrap;
    border-radius: 8px;
  }

  /* Скрываем все кнопки навигации кроме "Оставить заявку" */
  .nav-button:not([href="#form"]) {
    display: none;
  }

  /* Показываем эти кнопки только внутри открытого nav-links */
  .nav-links .nav-button:not([href="#form"]) {
    display: block;
  }
}

@media (max-width: 480px) {
  .advantage-item {
    flex: 0 1 100%;
  }

  .certificate {
    flex: 0 1 100%;
  }

  .calc-group select {
    font-size: 0.9rem;
  }

  .header-left .subtitle {
    font-size: 1.2rem;
  }
  
  .header-left .title {
    font-size: 1.6rem;
  }
  
  .contact-form {
    padding: 1rem;
  }
  
  .form-group input,
  .form-group textarea,
  .form-group select {
    padding: 0.75rem;
  }

  .nav-button[href="#form"] {
    font-size: 0.9rem;
    padding: 0.8rem 1.5rem;
  }
  
  .nav-links .nav-button {
    font-size: 0.85rem;
    padding: 0.7rem;
  }
}

/* Features Section */
.features-section {
  padding: 3rem 2rem;
  background: linear-gradient(135deg, #4a90e2, #6ba7e9);
  color: var(--white);
}

.features-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.feature-item {
  flex: 1;
  text-align: center;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  transition: transform 0.3s ease;
}

.feature-item:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.2);
}

.feature-item h3 {
  font-size: 1.5rem;
  margin: 0;
  color: #ff7a00;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.15);
}

.feature-item p {
  margin: 0.5rem 0 0;
  font-size: 1rem;
  opacity: 0.9;
}

/* Responsive Updates */
@media (max-width: 1200px) {
  .features-container {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
  }

  .feature-item {
    flex: 0 1 calc(33.333% - 1.5rem);
    min-width: 250px;
  }
}

@media (max-width: 768px) {
  .feature-item {
    flex: 0 1 calc(50% - 1.5rem);
  }

  .feature-item h3 {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .feature-item {
    flex: 0 1 100%;
  }
}

/* Pulsing animation for "Оставить заявку" button */
@keyframes pulse {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.7);
  }
  
  70% {
    transform: scale(1.05);
    box-shadow: 0 0 0 10px rgba(245, 158, 11, 0);
  }
  
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0);
  }
}

.modal .modal-content {
  position: relative;
  background: var(--white);
  padding: 1rem;
  border-radius: 15px;
  max-width: 90%;
  margin: 2rem auto;
}

.modal .close-btn {
  position: absolute;
  top: -1.5rem;
  right: -1.5rem;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--text-color);
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.modal .close-btn:hover {
  background: var(--accent-color);
  color: var(--white);
  transform: rotate(90deg);
}

/* Cookie Consent Styles */
.cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.9);
  color: var(--white);
  z-index: 1000;
  padding: 1rem;
  transform: translateY(100%);
  animation: slideUp 0.5s forwards;
}

@keyframes slideUp {
  to {
    transform: translateY(0);
  }
}

.cookie-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding: 0.5rem;
}

.cookie-content p {
  margin: 0;
  font-size: 0.95rem;
}

.cookie-form {
  flex-shrink: 0;
}

.cookie-accept {
  background: var(--accent-color);
  color: var(--white);
  border: none;
  padding: 0.75rem 2rem;
  border-radius: 30px;
  cursor: pointer;
  font-weight: bold;
  transition: all 0.3s ease;
}

.cookie-accept:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
}

/* Form Success Message */
.form-success {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #10B981;
  color: var(--white);
  padding: 1rem 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  animation: slideDown 0.5s ease-out, fadeOut 0.5s ease-in 3.5s forwards;
}

@keyframes slideDown {
  from {
    transform: translate(-50%, -100%);
    opacity: 0;
  }
  to {
    transform: translate(-50%, 0);
    opacity: 1;
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

.form-success p {
  margin: 0;
  font-weight: 500;
}

/* Responsive styles for cookie consent */
@media (max-width: 768px) {
  .cookie-content {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }
  
  .cookie-content p {
    font-size: 0.9rem;
  }
  
  .cookie-accept {
    width: 100%;
    padding: 0.75rem 1rem;
  }
}

.burger-menu {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  position: relative;
  z-index: 3;
}

.burger-menu span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--white);
  margin: 5px 0;
  transition: all 0.3s ease;
}

.form-group input:invalid,
.form-group textarea:invalid,
.form-group select:invalid {
  border-color: #dc2626;
}

.form-group input:focus:invalid,
.form-group textarea:focus:invalid,
.form-group select:focus:invalid {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}