:root {
  --main-color: #163253;
  --accent-color: #1e4e94;
  --text-color: #18283a;
  --white-color: #fff;
  --bg-gray: #f7f9fc;
  --border-color: #e0e4ef;
  --success: #219c62;
  --danger: #c12c2c;
  --warning: #f39c12;
  --shadow: 0 10px 42px rgba(22,50,83,0.08);
  --radius: 14px;
}

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

html, body {
  background: var(--bg-gray);
  color: var(--text-color);
  font-size: clamp(16px, 2.5vw, 18px);
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: 'Open Sans', Arial, sans-serif;
  line-height: 1.6;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 24px);
}

/* Header */
header {
  background: var(--white-color);
  border-bottom: 2px solid var(--border-color);
  padding: clamp(12px, 3vw, 22px) 0;
  position: sticky;
  top: 0;
  z-index: 1020;
  box-shadow: 0 2px 16px rgba(30,78,148,.04);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.1rem, 2.5vw, 1.32rem);
  font-weight: 700;
  color: var(--main-color);
  letter-spacing: 0.8px;
}

.logo-img {
  height: clamp(28px, 5vw, 32px);
  border-radius: 7px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: clamp(16px, 4vw, 28px);
  flex-wrap: wrap;
}

nav a {
  color: var(--main-color);
  font-weight: 600;
  font-family: 'Montserrat', sans-serif;
  text-decoration: none;
  transition: 0.21s;
  position: relative;
  font-size: clamp(0.9rem, 2vw, 1rem);
}

nav a::after {
  content: "";
  display: block;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: 0.23s;
  position: absolute;
  left: 0;
  bottom: -2px;
}

nav a:hover::after {
  width: 100%;
}

nav a:hover {
  color: var(--accent-color);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--main-color);
  cursor: pointer;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  nav {
    display: none;
    width: 100%;
    margin-top: 16px;
  }
  
  nav.active {
    display: block;
  }
  
  nav ul {
    flex-direction: column;
    gap: 12px;
  }
}

/* Hero Section */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(24px, 6vw, 44px);
  background: var(--white-color);
  margin-top: clamp(24px, 5vw, 37px);
  padding: clamp(32px, 6vw, 56px) clamp(20px, 4vw, 40px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-text {
  flex: 1;
  max-width: 100%;
}

.hero h1 {
  font-family: 'Montserrat', sans-serif;
  color: var(--main-color);
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 700;
  margin: 0 0 18px 0;
  line-height: 1.2;
}

.hero h2 {
  font-family: 'Montserrat', sans-serif;
  color: var(--accent-color);
  margin: 0 0 17px 0;
  font-size: clamp(1rem, 2.5vw, 1.13rem);
  font-weight: 600;
}

.hero p {
  font-size: clamp(0.95rem, 2.2vw, 1.03rem);
  margin-bottom: 25px;
  line-height: 1.62;
}

.hero-cta {
  display: flex;
  gap: clamp(12px, 3vw, 18px);
  flex-wrap: wrap;
  margin-top: 10px;
}

.btn {
  padding: clamp(10px, 2.5vw, 13px) clamp(18px, 4vw, 26px);
  border-radius: 9px;
  font-weight: 700;
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(0.9rem, 2vw, 1rem);
  color: var(--white-color);
  background: linear-gradient(90deg, var(--main-color), var(--accent-color));
  border: none;
  cursor: pointer;
  transition: 0.17s;
  border: 2px solid transparent;
  box-shadow: 0 3px 12px rgba(30,78,148,0.05);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  justify-content: center;
  min-width: 120px;
}

.btn:hover {
  background: linear-gradient(90deg, var(--accent-color), var(--main-color));
  box-shadow: 0 6px 18px rgba(30,78,148,0.13);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--white-color);
  color: var(--main-color);
  border: 2px solid var(--main-color);
}

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

.hero-photo {
  max-width: clamp(200px, 35vw, 300px);
  width: 100%;
  border-radius: 18px;
  box-shadow: 0 5px 22px rgba(22,50,83,0.10);
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    text-align: center;
    gap: 32px;
  }
  
  .hero-cta {
    justify-content: center;
  }
}

/* Sections */
section {
  background: var(--white-color);
  margin: clamp(24px, 5vw, 36px) 0;
  padding: clamp(32px, 6vw, 44px) 0 clamp(28px, 5vw, 38px) 0;
  border-radius: var(--radius);
  box-shadow: 0 4px 16px rgba(22,50,83,.050);
}

section h3 {
  text-align: center;
  color: var(--main-color);
  font-size: clamp(1.1rem, 3vw, 1.25rem);
  margin: 0 0 clamp(1.5rem, 4vw, 2.1rem) 0;
  font-family: 'Montserrat', sans-serif;
}

/* EXIF Analyzer */
.exif-analyzer {
  background: linear-gradient(135deg, #f8fbff 0%, #e8f4fd 100%);
  border: 2px solid var(--accent-color);
}

.upload-area {
  border: 3px dashed var(--accent-color);
  border-radius: 12px;
  padding: clamp(20px, 5vw, 40px);
  text-align: center;
  background: var(--white-color);
  margin-bottom: 20px;
  transition: 0.3s;
  cursor: pointer;
}

.upload-area:hover {
  border-color: var(--main-color);
  background: #f0f7ff;
}

.upload-area.dragover {
  border-color: var(--success);
  background: #f0fff4;
}

.upload-icon {
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--accent-color);
  margin-bottom: 16px;
}

.file-input {
  display: none;
}

.upload-text {
  font-size: clamp(1rem, 2.5vw, 1.1rem);
  margin-bottom: 12px;
  color: var(--text-color);
}

.upload-hint {
  font-size: clamp(0.85rem, 2vw, 0.9rem);
  color: #666;
}

.exif-results {
  display: none;
  margin-top: 24px;
  padding: 20px;
  background: var(--white-color);
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.exif-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.exif-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid #eee;
}

.exif-label {
  font-weight: 600;
  color: var(--main-color);
}

.exif-value {
  color: var(--text-color);
  text-align: right;
  word-break: break-all;
}

.image-preview {
  max-width: 100%;
  max-height: 300px;
  border-radius: 8px;
  margin: 16px 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Services */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(16px, 4vw, 22px);
}

.service-card {
  background: var(--bg-gray);
  border-radius: 13px;
  padding: clamp(20px, 4vw, 30px) clamp(14px, 3vw, 18px) clamp(16px, 3vw, 22px);
  box-shadow: 0 2px 8px rgba(22,50,83,.04);
  text-align: center;
  transition: 0.19s;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  background: #e6eefd;
  transform: translateY(-3px);
  border: 1.2px solid var(--accent-color);
}

.service-card .icon {
  font-size: clamp(2rem, 5vw, 2.5rem);
  margin-bottom: 13px;
  color: var(--accent-color);
}

.service-card h4 {
  margin: 0 0 10px 0;
  color: var(--main-color);
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1rem, 2.5vw, 1.1rem);
}

.service-card p {
  font-size: clamp(0.9rem, 2vw, 0.98rem);
  color: #333;
  flex-grow: 1;
}

/* Benefits & Other Grid Layouts */
.benefits-grid, .audiences-grid, .reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: clamp(16px, 4vw, 19px);
}

.benefit-item, .audience-item, .review-card {
  background: var(--bg-gray);
  padding: clamp(16px, 4vw, 23px) clamp(12px, 3vw, 15px) clamp(12px, 3vw, 17px);
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 1px 6px rgba(30,78,148,0.07);
  font-size: clamp(0.9rem, 2.2vw, 1.01rem);
  transition: 0.15s;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.benefit-item {
  border-left: 5px solid var(--accent-color);
  text-align: left;
  align-items: flex-start;
}

.benefit-item .fa-solid,
.audience-item .fa-solid {
  margin-bottom: 8px;
  color: var(--accent-color);
  font-size: clamp(1.3rem, 3vw, 1.5rem);
}

/* Steps */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 3vw, 17px);
  align-items: center;
  max-width: 800px;
  margin: 0 auto;
}

.step-item {
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 3vw, 17px);
  background: var(--bg-gray);
  border-radius: 9px;
  padding: clamp(14px, 3vw, 17px) clamp(10px, 2.5vw, 12px) clamp(14px, 3vw, 17px) clamp(14px, 3vw, 18px);
  box-shadow: 0 1px 8px rgba(30,78,148,0.05);
  width: 100%;
}

.step-num {
  flex-shrink: 0;
  width: clamp(28px, 6vw, 32px);
  height: clamp(28px, 6vw, 32px);
  background: var(--main-color);
  color: var(--white-color);
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(0.9rem, 2vw, 1.03rem);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-weight: 600;
}

.step-text {
  font-size: clamp(0.9rem, 2.2vw, 1rem);
  line-height: 1.5;
}

/* Reviews */
.review-card {
  position: relative;
  text-align: left;
  align-items: flex-start;
}

.review-author {
  margin: 13px 0 2px 0;
  font-weight: 700;
  color: var(--main-color);
  font-size: clamp(0.9rem, 2vw, 1rem);
}

.review-quote {
  font-style: italic;
  color: #38507b;
  line-height: 1.6;
  flex-grow: 1;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 11px;
  border-radius: 9px;
  border: 1.2px solid var(--border-color);
  overflow: hidden;
  background: var(--white-color);
}

.faq-q {
  background: var(--bg-gray);
  padding: clamp(14px, 3vw, 18px);
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: clamp(0.9rem, 2.2vw, 1rem);
  transition: 0.2s;
}

.faq-q:hover {
  background: #e0e8f7;
}

.faq-a {
  padding: clamp(14px, 3vw, 18px);
  display: none;
  color: #314151;
  line-height: 1.6;
  font-size: clamp(0.9rem, 2vw, 0.95rem);
}

.faq-a.show {
  display: block;
}

/* Contact */
.contact-flex {
  display: flex;
  gap: clamp(40px, 8vw, 60px);
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
}

.contact-info {
  flex: 1;
  min-width: 280px;
  font-size: clamp(0.95rem, 2.2vw, 1.04rem);
  line-height: 1.6;
}

.contact-info b {
  font-family: 'Montserrat', sans-serif;
  color: var(--main-color);
  font-weight: 700;
}

.contact-block a {
  color: var(--accent-color);
  text-decoration: none;
  transition: 0.15s;
}

.contact-block a:hover {
  color: var(--main-color);
  text-decoration: underline;
}

.feedback-form {
  flex: 1;
  min-width: 280px;
  max-width: 400px;
  background: var(--bg-gray);
  padding: clamp(14px, 3vw, 16px) clamp(12px, 2.5vw, 13px);
  border-radius: 16px;
  box-shadow: 0 1px 6px rgba(30,78,148,0.04);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feedback-form input,
.feedback-form textarea {
  width: 100%;
  padding: clamp(8px, 2vw, 9px) clamp(8px, 2vw, 10px);
  border: 1.3px solid var(--border-color);
  border-radius: 7px;
  font-size: clamp(0.9rem, 2vw, 1rem);
  font-family: inherit;
  transition: 0.2s;
}

.feedback-form input:focus,
.feedback-form textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(30,78,148,0.1);
}

.feedback-form textarea {
  resize: vertical;
  min-height: clamp(40px, 8vw, 48px);
}

.feedback-form label[for=consent] {
  font-size: clamp(0.85rem, 2vw, 0.96rem);
  display: flex;
  align-items: center;
  gap: 6px;
  line-height: 1.4;
}

.feedback-form button {
  margin-top: 9px;
}

.map {
  width: 100%;
  height: clamp(180px, 35vw, 210px);
  border-radius: 10px;
  margin: clamp(16px, 4vw, 19px) 0 7px 0;
  border: none;
}

/* Footer */
footer {
  background: var(--white-color);
  border-top: 2px solid var(--border-color);
  padding: clamp(20px, 4vw, 23px) 0;
  margin-top: clamp(24px, 5vw, 33px);
  text-align: center;
}

.footer-dev-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.footer-logo-link {
  display: inline-block;
  transition: transform 0.2s ease;
}

.footer-logo-link:hover {
  transform: scale(1.1);
}

.footer-logo-link img {
  height: clamp(32px, 6vw, 40px);
  border-radius: 8px;
}

.footer-dev {
  font-size: clamp(0.85rem, 2vw, 0.98rem);
  color: #747e91;
  opacity: 0.98;
  margin-top: 4px;
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 280px;
  }
  
  .contact-flex {
    flex-direction: column;
    gap: 30px;
  }
  
  .services-grid,
  .benefits-grid,
  .audiences-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}

/* Loading animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid #f3f3f3;
  border-top: 3px solid var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Success/Error messages */
.message {
  padding: 12px 16px;
  border-radius: 8px;
  margin: 12px 0;
  font-weight: 600;
}

.message.success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.message.error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.message.warning {
  background: #fff3cd;
  color: #856404;
  border: 1px solid #ffeaa7;
}