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

:root {
  --primary-blue: #1e3a5f;
  --primary-blue-light: #2d5a8a;
  --accent-blue: #3498db;
  --success-green: #27ae60;
  --warning-orange: #e67e22;
  --text-dark: #2c3e50;
  --text-medium: #5a6c7d;
  --text-light: #8b9cad;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --border-light: #e1e8ef;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg-light);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 50%, var(--accent-blue) 100%);
  color: white;
  padding: 80px 24px;
  text-align: center;
}

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

.hero h1 {
  font-size: 2.75rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  opacity: 0.95;
  max-width: 650px;
  margin: 0 auto;
}

.problem-section {
  padding: 80px 24px;
  background: var(--bg-white);
}

.problem-section h2 {
  text-align: center;
  font-size: 2rem;
  color: var(--primary-blue);
  margin-bottom: 48px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.problem-card {
  background: var(--bg-light);
  border-radius: 12px;
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border-light);
}

.problem-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.problem-card h3 {
  font-size: 1.125rem;
  color: var(--text-dark);
  margin-bottom: 12px;
}

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

.solution-section {
  padding: 80px 24px;
  background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
}

.solution-section h2 {
  text-align: center;
  font-size: 2rem;
  color: var(--primary-blue);
  margin-bottom: 16px;
}

.solution-intro {
  text-align: center;
  color: var(--text-medium);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 48px;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
}

.solution-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--bg-white);
  border-radius: 8px;
  border: 1px solid var(--border-light);
}

.feature-check {
  color: var(--success-green);
  font-size: 1.25rem;
  font-weight: 700;
}

.calculator-section {
  padding: 80px 24px;
  background: var(--bg-white);
}

.calculator-card {
  background: var(--bg-white);
  border-radius: 16px;
  padding: 48px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  max-width: 800px;
  margin: 0 auto;
}

.calculator-card h2 {
  text-align: center;
  font-size: 1.75rem;
  color: var(--primary-blue);
  margin-bottom: 12px;
}

.calculator-intro {
  text-align: center;
  color: var(--text-medium);
  margin-bottom: 36px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.form-row.single {
  grid-template-columns: 1fr;
  max-width: 50%;
}

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

.form-group label {
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.form-group input,
.form-group select {
  padding: 14px 16px;
  border: 2px solid var(--border-light);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
}

.btn-calculate {
  width: 100%;
  padding: 18px 32px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
  color: white;
  font-size: 1.125rem;
  font-weight: 700;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 16px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-calculate:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.results-section {
  padding: 80px 24px;
  background: var(--bg-light);
  display: none;
}

.results-section.visible {
  display: block;
}

.results-card {
  background: var(--bg-white);
  border-radius: 16px;
  padding: 48px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  max-width: 900px;
  margin: 0 auto;
}

.results-card h2 {
  text-align: center;
  font-size: 1.75rem;
  color: var(--primary-blue);
  margin-bottom: 8px;
}

.results-name {
  text-align: center;
  color: var(--text-medium);
  margin-bottom: 36px;
  font-size: 1.1rem;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 36px;
}

.result-block {
  background: var(--bg-light);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid var(--border-light);
}

.result-block h3 {
  font-size: 1rem;
  color: var(--text-medium);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
}

.result-label {
  color: var(--text-medium);
  font-size: 0.95rem;
}

.result-value {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-dark);
}

.result-item.highlight {
  background: rgba(52, 152, 219, 0.1);
  margin: 8px -16px;
  padding: 12px 16px;
  border-radius: 8px;
}

.result-item.highlight .result-value {
  color: var(--accent-blue);
}

.result-item.equity {
  background: rgba(39, 174, 96, 0.1);
  margin: 8px -16px;
  padding: 12px 16px;
  border-radius: 8px;
}

.result-item.equity .result-value {
  color: var(--success-green);
  font-size: 1.25rem;
}

.result-block.components {
  grid-column: span 2;
}

@media (max-width: 768px) {
  .result-block.components {
    grid-column: span 1;
  }
}

.result-block.total {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
  color: white;
}

.result-block.total h3 {
  color: rgba(255, 255, 255, 0.8);
  border-bottom-color: rgba(255, 255, 255, 0.2);
}

.result-item.grand-total {
  flex-direction: column;
  text-align: center;
  padding: 20px 0;
}

.result-item.grand-total .result-label {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 8px;
}

.result-item.grand-total .result-value {
  color: white;
  font-size: 2.5rem;
  font-weight: 800;
}

.financing-section {
  background: var(--bg-light);
  border-radius: 12px;
  padding: 32px;
  margin-bottom: 36px;
  border: 1px solid var(--border-light);
}

.financing-section h3 {
  text-align: center;
  font-size: 1.25rem;
  color: var(--primary-blue);
  margin-bottom: 24px;
}

.financing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.financing-item {
  text-align: center;
  padding: 20px;
  background: var(--bg-white);
  border-radius: 10px;
  border: 1px solid var(--border-light);
}

.financing-label {
  display: block;
  color: var(--text-medium);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.financing-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
}

.financing-value.negative {
  color: var(--warning-orange);
}

.financing-value.positive {
  color: var(--success-green);
}

.financing-item.net {
  background: var(--primary-blue);
  border-color: var(--primary-blue);
}

.financing-item.net .financing-label {
  color: rgba(255, 255, 255, 0.8);
}

.financing-item.net .financing-value {
  color: white;
}

.action-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.btn-print,
.btn-send {
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.btn-print:hover {
  background: var(--bg-light);
}

.btn-send {
  background: var(--success-green);
  color: white;
  border: none;
}

.btn-send:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

footer {
  padding: 48px 24px;
  background: var(--text-dark);
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
}

.disclaimer {
  font-size: 0.85rem;
  max-width: 800px;
  margin: 0 auto 16px;
  line-height: 1.7;
}

.disclaimer strong {
  color: rgba(255, 255, 255, 0.9);
}

.copyright {
  font-size: 0.85rem;
  opacity: 0.6;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .form-row.single {
    max-width: 100%;
  }

  .calculator-card,
  .results-card {
    padding: 32px 24px;
  }

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

  .action-buttons {
    flex-direction: column;
  }

  .btn-print,
  .btn-send {
    width: 100%;
  }

  .result-item.grand-total .result-value {
    font-size: 2rem;
  }
}

@media print {
  .hero {
    background: #1e3a5f !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .problem-section,
  .solution-section,
  .calculator-section {
    display: none;
  }

  .results-section {
    display: block !important;
    padding: 20px;
  }

  .action-buttons {
    display: none;
  }

  .result-block.total,
  .financing-item.net {
    background: #1e3a5f !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  footer {
    background: #2c3e50 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}