:root {
  --bg: #f8f9fc;
  --fg: #0a1428;
  --muted: #6c757d;
  --border: #d9e0e6;
  --accent: #1f5a96;
  --accent-light: #2d7bc9;
  --accent-dark: #174089;
  --gold: #b8860b;
  --gold-light: #d4af37;
  --success: #198754;
  --error: #dc3545;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

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

a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

/* Layout helpers */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Navigation */
.nav {
  display: flex;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 2px solid var(--border);
  margin: 0;
  list-style: none;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
}

.nav-item {
  list-style: none;
}

.nav-link {
  color: var(--accent-dark);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.01em;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--gold-light);
  text-decoration: none;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, #0a1428 0%, #1a2b47 50%, #0d3b66 100%);
  color: #ffffff;
  padding: 8rem 1.5rem;
  text-align: center;
  margin-bottom: 5rem;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(45, 123, 201, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2.8rem, 8vw, 4.8rem);
  margin: 0;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
  font-size: 2.2rem;
  color: var(--gold-light);
  margin: 0;
  margin-bottom: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.08em;
}

.hero-description {
  font-size: 1.3rem;
  color: #d4e0eb;
  margin: 0;
  max-width: 650px;
  margin: 0 auto;
  font-weight: 300;
  line-height: 1.7;
}

/* Value Section */
.value-section {
  margin-bottom: 5rem;
}

.value-card {
  background: linear-gradient(135deg, #ffffff 0%, #f5f7fc 100%);
  border: 2px solid var(--border);
  padding: 3rem;
  border-radius: 0.75rem;
  margin-bottom: 2rem;
  box-shadow: 0 8px 24px rgba(10, 20, 40, 0.06);
  transition: all 0.3s ease;
}

.value-card:hover {
  border-color: var(--accent);
  box-shadow: 0 12px 32px rgba(31, 90, 150, 0.12);
}

.value-card h2 {
  font-size: 1.85rem;
  margin-top: 0;
  margin-bottom: 1.25rem;
  color: var(--accent-dark);
  font-weight: 700;
}

.stats-card {
  background: linear-gradient(135deg, #ffffff 0%, #f5f8ff 100%);
  border: 2px solid var(--accent-light);
  position: relative;
}

.stats-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--gold-light) 100%);
  border-radius: 0.75rem 0.75rem 0 0;
}

.stats-title {
  font-size: 1.4rem;
  margin-top: 0;
  margin-bottom: 2.5rem;
  color: var(--accent-dark);
  font-weight: 700;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
  background: rgba(31, 90, 150, 0.02);
  border-radius: 0.5rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: block;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0 0;
}

.feature-list li {
  padding: 0.9rem 0 0.9rem 2.25rem;
  position: relative;
  color: var(--fg);
  font-weight: 500;
  line-height: 1.6;
}

.feature-list li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--gold-light);
  font-weight: 800;
  font-size: 1.2rem;
}

/* Use Cases Section */
.use-cases-section {
  margin-bottom: 5rem;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 4rem;
  font-weight: 700;
  color: var(--accent-dark);
  position: relative;
  display: inline-block;
  width: 100%;
  text-align: center;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--gold-light) 100%);
  border-radius: 2px;
}

.use-case-card {
  background: linear-gradient(135deg, #ffffff 0%, #f5f7fc 100%);
  border: 2px solid var(--border);
  padding: 2.5rem 2rem;
  border-radius: 0.75rem;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  height: 100%;
  box-shadow: 0 4px 12px rgba(10, 20, 40, 0.04);
}

.use-case-card:hover {
  border-color: var(--accent);
  box-shadow: 0 16px 40px rgba(31, 90, 150, 0.15);
  transform: translateY(-6px);
  background: linear-gradient(135deg, #ffffff 0%, #f0f5ff 100%);
}

.use-case-icon {
  font-size: 3rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
  transition: transform 0.3s ease;
}

.use-case-card:hover .use-case-icon {
  transform: scale(1.15);
  color: var(--gold-light);
}

.use-case-card h3 {
  font-size: 1.2rem;
  margin-top: 0;
  margin-bottom: 1rem;
  font-weight: 700;
  color: var(--accent-dark);
  flex-grow: 0;
}

.use-case-card p {
  color: var(--muted);
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  flex-grow: 1;
  display: flex;
  align-items: center;
}

/* Inquiry Section */
.inquiry-section {
  margin-bottom: 4rem;
}

.form-container {
  background: linear-gradient(135deg, #ffffff 0%, #f5f7fc 100%);
  padding: 3.5rem;
  border-radius: 0.75rem;
  border: 2px solid var(--border);
  box-shadow: 0 12px 32px rgba(10, 20, 40, 0.08);
}

.form-container h2 {
  font-size: 1.9rem;
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--accent-dark);
  font-weight: 700;
}

.form-description {
  color: var(--muted);
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
}

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

.form-row-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .form-row-grid {
    grid-template-columns: 1fr;
  }
}

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

.form-label {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--fg);
  font-size: 0.95rem;
}

.form-input {
  padding: 0.9rem 1.2rem;
  border: 2px solid var(--border);
  border-radius: 0.5rem;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.2s ease;
  background: #ffffff;
  color: var(--fg);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(31, 90, 150, 0.1);
  background: #ffffff;
}

.form-textarea {
  resize: vertical;
  min-height: 160px;
}

.submit-btn {
  padding: 1rem 2.5rem;
  background: linear-gradient(135deg, var(--accent) 0%, #2d7bc9 100%);
  color: #ffffff;
  border: none;
  border-radius: 0.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  margin-top: 1rem;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 15px rgba(31, 90, 150, 0.2);
}

.submit-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(31, 90, 150, 0.35);
  background: linear-gradient(135deg, #174089 0%, #1f5a96 100%);
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.spinner {
  display: inline-block;
  width: 1em;
  height: 1em;
  border: 2px solid #ffffff;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: 0.5rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.form-status {
  padding: 1rem;
  border-radius: 0.5rem;
  display: none;
  font-size: 0.95rem;
}

.form-status.success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.form-status.error {
  background: #fee2e2;
  color: #7f1d1d;
  border: 1px solid #fca5a5;
}

/* Sidebar */
.info-sidebar {
  margin-top: 2rem;
}

.sidebar-card {
  background: linear-gradient(135deg, #ffffff 0%, #f5f7fc 100%);
  border: 2px solid var(--accent-light);
  padding: 2.5rem;
  border-radius: 0.75rem;
  box-shadow: 0 8px 24px rgba(31, 90, 150, 0.08);
  position: relative;
}

.sidebar-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-light) 0%, var(--accent) 100%);
  border-radius: 0.75rem 0.75rem 0 0;
}

.sidebar-card h3 {
  font-size: 1.35rem;
  margin-top: 0;
  margin-bottom: 1.75rem;
  color: var(--accent-dark);
  font-weight: 700;
}

.benefit-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.benefit-list li {
  padding: 0.9rem 0 0.9rem 2rem;
  position: relative;
  color: var(--fg);
  font-weight: 500;
  line-height: 1.6;
}

.benefit-list li:before {
  content: "⟶";
  position: absolute;
  left: 0;
  color: var(--gold-light);
  font-weight: 700;
  font-size: 1.1rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .form-container {
    padding: 2rem;
  }

  .info-sidebar {
    margin-top: 0;
    order: -1;
  }
}

/* Footer */
footer {
  border-top: 2px solid var(--border);
  padding: 3rem 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  background: rgba(245, 247, 252, 0.7);
  margin-top: 3rem;
  font-weight: 500;
}