/* ===== CSS Variables ===== */
:root {
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary-color: #10b981;
  --accent-color: #8b5cf6;
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
  --text-light: #9ca3af;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-dark: #111827;
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s ease;
  --border-radius: 8px;
  --container-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

ul {
  list-style: none;
}

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--primary-color);
  margin: 1rem auto 0;
  border-radius: 2px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: transparent;
  color: white;
}

/* ===== Header & Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
}

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

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-color);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.lang-switcher {
  display: flex;
  gap: 0.5rem;
}

.lang-btn {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

.lang-btn:hover,
.lang-btn.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
  padding: 10rem 0 6rem;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  text-align: center;
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Services Section ===== */
.services {
  padding: 6rem 0;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.service-card {
  padding: 2.5rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  text-align: center;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.service-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  border-radius: 50%;
  color: white;
}

.service-card h3 {
  margin-bottom: 1rem;
}

.service-card p {
  color: var(--text-secondary);
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 6rem 0;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  text-align: center;
  color: white;
}

.cta-section h2 {
  color: white;
  margin-bottom: 1rem;
}

.cta-section p {
  margin-bottom: 2rem;
  opacity: 0.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Page Hero ===== */
.page-hero {
  padding: 8rem 0 4rem;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  text-align: center;
}

.page-hero h1 {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== About Page ===== */
.about-intro {
  padding: 4rem 0;
}

.intro-text {
  font-size: 1.25rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.about-history {
  padding: 4rem 0;
  background-color: var(--bg-secondary);
}

.content-block {
  max-width: 800px;
  margin: 0 auto;
}

.content-block h2 {
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.content-block p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-values {
  padding: 6rem 0;
}

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

.value-card {
  padding: 2rem;
  text-align: center;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

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

.value-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
}

.value-card h3 {
  margin-bottom: 0.75rem;
}

.value-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.about-expertise {
  padding: 6rem 0;
  background-color: var(--bg-secondary);
}

.expertise-list {
  max-width: 700px;
  margin: 0 auto;
}

.expertise-list li {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  margin-bottom: 0.5rem;
  background-color: var(--bg-primary);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.expertise-list li:hover {
  transform: translateX(10px);
  box-shadow: var(--shadow-sm);
}

.expertise-list svg {
  color: var(--secondary-color);
  flex-shrink: 0;
}

/* ===== Mission Page ===== */
.mission-statement {
  padding: 4rem 0;
}

.statement-block {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.statement-text {
  font-size: 1.5rem;
  color: var(--text-secondary);
  line-height: 1.8;
  font-weight: 300;
}

.mission-details {
  padding: 4rem 0;
  background-color: var(--bg-secondary);
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.mission-card {
  padding: 2.5rem;
  background-color: var(--bg-primary);
  border-radius: var(--border-radius);
  text-align: center;
  box-shadow: var(--shadow-md);
}

.mission-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  border-radius: 50%;
  color: white;
}

.mission-card h2 {
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.mission-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.mission-commitment {
  padding: 6rem 0;
}

.commitment-list {
  max-width: 600px;
  margin: 0 auto;
}

.commitment-list li {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  margin-bottom: 1rem;
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  font-size: 1.1rem;
}

.commitment-list svg {
  color: var(--secondary-color);
  flex-shrink: 0;
}

/* ===== Contact Page ===== */
.contact-section {
  padding: 4rem 0 6rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
}

.contact-form-wrapper h2,
.contact-info-wrapper h2 {
  margin-bottom: 1rem;
}

.contact-form-wrapper > p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  padding: 0.875rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.contact-info-card {
  background-color: var(--bg-secondary);
  padding: 2rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.info-item:last-child {
  margin-bottom: 0;
}

.info-item svg {
  color: var(--primary-color);
  flex-shrink: 0;
  margin-top: 4px;
}

.info-item strong {
  display: block;
  margin-bottom: 0.25rem;
}

.info-item p {
  color: var(--text-secondary);
}

.company-info {
  padding: 1.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  border-radius: var(--border-radius);
  color: white;
  text-align: center;
}

/* ===== Error Pages ===== */
.error-page {
  padding: 10rem 0;
  text-align: center;
}

.error-content h1 {
  font-size: 8rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 1rem;
}

.error-content h2 {
  margin-bottom: 1rem;
}

.error-content p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* ===== Footer ===== */
.footer {
  background-color: var(--bg-dark);
  color: white;
  padding: 4rem 0 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo-text {
  color: white;
  margin-bottom: 0.5rem;
  display: block;
}

.footer-brand p {
  color: var(--text-light);
  font-size: 0.9rem;
}

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

.footer-nav a {
  color: var(--text-light);
}

.footer-nav a:hover {
  color: white;
}

.footer-bottom {
  padding: 1.5rem 0;
  text-align: center;
}

.footer-bottom p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .nav-links,
  .lang-switcher {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: white;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
  }

  .nav-links.active,
  .nav-links.active + .lang-switcher {
    display: flex;
  }

  .lang-switcher {
    top: auto;
    position: static;
    flex-direction: row;
    justify-content: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    margin-top: 1rem;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .hero {
    padding: 8rem 0 4rem;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

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

  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
  }

  .footer-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }

  .error-content h1 {
    font-size: 5rem;
  }

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

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

  .statement-text {
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .service-card,
  .value-card,
  .mission-card {
    padding: 1.5rem;
  }

  .btn {
    padding: 0.75rem 1.5rem;
  }
}