/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:      #1e5a9e;
  --primary-dark: #0f2942;
  --primary-light:#2c7abd;
  --accent:       #3d9cdb;
  --white:        #ffffff;
  --dark:         #1a202c;
  --text:         #4a5568;
  --text-light:   #718096;
  --bg-light:     #f7f9fc;
  --border:       #e2e8f0;
  --radius:       10px;
  --shadow:       0 4px 24px rgba(30,90,158,.10);
  --shadow-hover: 0 8px 32px rgba(30,90,158,.18);
  --transition:   0.3s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--white);
}

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

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

/* ===== LAYOUT ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }
.section   { padding: 88px 0; }

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--dark);
}
.section-subtitle {
  font-size: 1.125rem;
  text-align: center;
  color: var(--text-light);
  margin-bottom: 64px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-align: center;
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30,90,158,.3);
}
.btn-outline {
  background: transparent;
  border-color: var(--white);
  color: var(--white);
}
.btn-outline:hover {
  background: var(--white);
  color: var(--primary);
}

/* ===== HEADER ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: 0 2px 16px rgba(0,0,0,.09); }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.logo img { height: 44px; }

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
}
.nav-links a {
  font-weight: 500;
  color: var(--text);
  transition: color var(--transition);
  position: relative;
  padding-bottom: 4px;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--primary);
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--primary); }
.nav-links a:hover::after { width: 100%; }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: all var(--transition);
}
.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== HERO ===== */
.hero {
  min-height: 620px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0f2942 0%, #1e5a9e 50%, #2c7abd 100%);
  position: relative;
  overflow: hidden;
}
.hero-overlay {
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(61,156,219,.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(30,90,158,.12) 0%, transparent 50%);
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--white);
  padding: 80px 0;
}
.hero-title {
  font-size: 3.25rem;
  font-weight: 700;
  margin-bottom: 24px;
  line-height: 1.2;
  animation: fadeInUp .8s ease both;
}
.hero-description {
  font-size: 1.2rem;
  line-height: 1.8;
  margin: 0 auto 40px;
  max-width: 780px;
  opacity: .95;
  animation: fadeInUp .8s ease .2s both;
}
.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
  animation: fadeInUp .8s ease .4s both;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 48px;
  max-width: 800px;
  margin: 0 auto;
  animation: fadeInUp .8s ease .6s both;
}
.stat-number {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 8px;
  background: linear-gradient(135deg,#fff 0%,#e0f2ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: .95rem;
  opacity: .9;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
}
@keyframes fadeInUp {
  from { opacity:0; transform:translateY(28px); }
  to   { opacity:1; transform:translateY(0); }
}

/* ===== ABOUT ===== */
.about { background: var(--white); }
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.about-paragraph {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 20px;
  color: var(--text);
}
.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.feature-card {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 24px 20px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.feature-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg,var(--primary),var(--accent));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.feature-icon svg { width: 22px; height: 22px; stroke: var(--white); }
.feature-title   { font-size: 1rem; font-weight: 600; color: var(--dark); margin-bottom: 6px; }
.feature-description { font-size: .9rem; color: var(--text-light); }

/* ===== SERVICES ===== */
.services { background: var(--bg-light); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 28px;
}
.service-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 28px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-light);
}
.service-icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg,var(--primary-dark),var(--primary));
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.service-icon svg { width: 28px; height: 28px; stroke: var(--white); }
.service-title { font-size: 1.1rem; font-weight: 600; color: var(--dark); margin-bottom: 12px; }
.service-description { font-size: .95rem; color: var(--text-light); line-height: 1.7; }

/* ===== CLIENTS ===== */
.clients { background: var(--white); }
.clients-grid {
  display: grid;
  grid-template-columns: repeat(5,1fr);
  gap: 20px;
  margin-bottom: 48px;
}
.client-card {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.client-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.client-icon {
  width: 52px; height: 52px;
  background: linear-gradient(135deg,var(--primary),var(--accent));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px;
}
.client-icon svg { width: 24px; height: 24px; stroke: var(--white); }
.client-title { font-size: 1rem; font-weight: 600; color: var(--dark); margin-bottom: 6px; }
.client-description { font-size: .85rem; color: var(--text-light); }

.clients-trust {
  background: linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 100%);
  border-radius: 16px;
  padding: 48px 56px;
  color: var(--white);
  text-align: center;
}
.trust-title { font-size: 1.75rem; font-weight: 700; margin-bottom: 16px; }
.trust-text  { font-size: 1.05rem; opacity: .9; max-width: 600px; margin: 0 auto 36px; line-height: 1.7; }
.trust-stats { display: flex; gap: 64px; justify-content: center; flex-wrap: wrap; }
.trust-stat-value { font-size: 2.5rem; font-weight: 700; }
.trust-stat-label { font-size: .9rem; opacity: .85; margin-top: 4px; }

/* ===== CONTACT ===== */
.contact { background: var(--bg-light); }
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 56px;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.info-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  border: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.info-card:hover { box-shadow: var(--shadow); }
.info-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: linear-gradient(135deg,var(--primary),var(--accent));
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
}
.info-icon svg { width: 20px; height: 20px; stroke: var(--white); }
.info-title  { font-size: .875rem; font-weight: 600; color: var(--text-light); margin-bottom: 4px; }
.info-detail { font-size: 1rem; font-weight: 500; color: var(--dark); }
.info-detail a { color: var(--primary); }
.info-detail a:hover { text-decoration: underline; }

.contact-form {
  background: var(--white);
  border-radius: 14px;
  padding: 40px 36px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: .9rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 6px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  color: var(--dark);
  background: var(--bg-light);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  font-family: inherit;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30,90,158,.12);
  background: var(--white);
}
.btn-submit { width: 100%; margin-top: 4px; }
.btn-submit:disabled { opacity: .6; cursor: not-allowed; transform: none !important; }

.form-success {
  background: #e6f4ea;
  color: #1e7e34;
  border: 1px solid #a8d5b5;
  border-radius: 6px;
  padding: 14px 18px;
  margin-bottom: 20px;
  font-weight: 500;
}

/* ===== FOOTER ===== */
.footer { background: var(--primary-dark); color: rgba(255,255,255,.85); padding: 64px 0 0; }
.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.footer-logo img { height: 40px; margin-bottom: 14px; }
.footer-description { font-size: .9rem; opacity: .75; line-height: 1.7; }
.footer-title { font-size: 1rem; font-weight: 700; color: var(--white); margin-bottom: 16px; }
.footer-links, .footer-contacts { list-style: none; }
.footer-links li, .footer-contacts li {
  font-size: .9rem;
  margin-bottom: 10px;
  opacity: .75;
}
.footer-links a { transition: opacity var(--transition); }
.footer-links a:hover { opacity: 1; color: var(--accent); }
.footer-contacts a { color: inherit; }
.footer-contacts a:hover { color: var(--accent); }
.footer-bottom {
  text-align: center;
  padding: 20px 0;
  font-size: .875rem;
  opacity: .55;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
  .clients-grid { grid-template-columns: repeat(3,1fr); }
  .footer-content { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .about-content { grid-template-columns: 1fr; gap: 40px; }
  .services-grid { grid-template-columns: 1fr 1fr; }
  .contact-content { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.5rem; }
}

@media (max-width: 640px) {
  .menu-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 70px; left: 0; right: 0;
    background: var(--white);
    flex-direction: column;
    gap: 0;
    border-top: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(0,0,0,.08);
  }
  .nav-links.active { display: flex; }
  .nav-links li { border-bottom: 1px solid var(--border); }
  .nav-links a { display: block; padding: 16px 24px; }
  .nav-links a::after { display: none; }

  .section { padding: 60px 0; }
  .section-title { font-size: 2rem; }
  .hero-title { font-size: 2rem; }
  .hero-description { font-size: 1rem; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .hero-stats { grid-template-columns: 1fr; gap: 28px; }

  .about-features { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .clients-grid { grid-template-columns: 1fr 1fr; }
  .footer-content { grid-template-columns: 1fr; }
  .clients-trust { padding: 32px 24px; }
  .trust-stats { gap: 32px; }
  .contact-form { padding: 24px 20px; }
}

@media (max-width: 440px) {
  .clients-grid { grid-template-columns: 1fr; }
}