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

:root {
  --navy-900: #0b0f19;
  --navy-800: #121826;
  --navy-700: #1a1f2e;
  --navy-600: #252b3b;
  --navy-500: #3b4458;
  --navy-400: #5a6480;
  --navy-300: #7c86a3;
  --navy-200: #b0b8cc;
  --navy-100: #d6dbe8;
  --navy-50: #eef1f7;

  --blue-600: #1a56db;
  --blue-500: #2563eb;
  --blue-400: #3b82f6;
  --blue-50: #eff6ff;

  --green-600: #059669;
  --green-500: #10b981;
  --green-50: #ecfdf5;

  --red-600: #dc2626;
  --red-50: #fef2f2;

  --amber-500: #f59e0b;
  --amber-50: #fffbeb;

  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;

  --leading-tight: 1.25;
  --leading-normal: 1.6;

  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(11, 15, 25, 0.06);
  --shadow-md: 0 4px 12px rgba(11, 15, 25, 0.08);
  --shadow-lg: 0 8px 24px rgba(11, 15, 25, 0.10);
  --shadow-glow-blue: 0 0 0 3px rgba(37, 99, 235, 0.18);
  --shadow-glow-green: 0 0 0 3px rgba(16, 185, 129, 0.18);
  --shadow-glow-red: 0 0 0 3px rgba(220, 38, 38, 0.18);

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: linear-gradient(145deg, var(--gray-50) 0%, var(--navy-50) 100%);
  color: var(--navy-700);
  line-height: var(--leading-normal);
  min-height: 100vh;
  min-height: 100dvh;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-4);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
  min-height: 100vh;
  min-height: 100dvh;
}

.cabecalho {
  text-align: center;
  padding: var(--spacing-8) var(--spacing-4) var(--spacing-4);
}

.cabecalho-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-3);
}

.cabecalho-brand-icon {
  width: 32px;
  height: 32px;
  background: var(--navy-800);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.cabecalho-brand-name {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--navy-800);
  letter-spacing: -0.03em;
}

.cabecalho h1 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--navy-800);
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
}

.cabecalho-sub {
  font-size: var(--text-sm);
  color: var(--navy-400);
  margin-top: var(--spacing-2);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.card {
  background: var(--white);
  border: 1px solid var(--navy-100);
  border-radius: var(--radius-lg);
  padding: var(--spacing-5);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-highlight {
  border-color: var(--green-600);
  background: linear-gradient(135deg, var(--white) 0%, var(--green-50) 100%);
  box-shadow: 0 4px 16px rgba(5, 150, 105, 0.10);
  position: relative;
  overflow: hidden;
}

.card-highlight::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--green-500), var(--green-600));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.formulario {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.formulario .label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--navy-700);
  letter-spacing: 0.01em;
}

.select-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.select {
  width: 100%;
  padding: 0.75rem 2.75rem 0.75rem 1rem;
  border: 1.5px solid var(--navy-100);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-family: var(--font-sans);
  color: var(--navy-700);
  background: var(--white);
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.select:hover {
  border-color: var(--navy-300);
}

.select:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: var(--shadow-glow-blue);
}

.select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--gray-50);
}

.select-chevron {
  position: absolute;
  right: 1rem;
  pointer-events: none;
  color: var(--navy-400);
  transition: transform var(--transition-fast);
}

.select:focus + .select-chevron {
  color: var(--blue-500);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  background: var(--navy-800);
  color: var(--white);
  border: none;
  border-radius: var(--radius-md);
  padding: 0.8125rem 1.75rem;
  font-size: var(--text-base);
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
  width: 100%;
  letter-spacing: 0.01em;
}

.btn:hover {
  background: var(--navy-900);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
  background: var(--navy-700);
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-glow-blue);
}

.btn-icon {
  font-size: var(--text-lg);
  line-height: 1;
}

.erro {
  background: var(--red-50);
  border: 1px solid #fecaca;
  color: var(--red-600);
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.erro-icon {
  flex-shrink: 0;
  font-size: var(--text-lg);
}

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-8);
  gap: var(--spacing-3);
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--navy-100);
  border-top-color: var(--blue-500);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.resultado-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
}

.resultado-header-icon {
  font-size: var(--text-xl);
}

.resultado-titulo {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--navy-700);
}

.resultado-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--green-600);
  background: var(--green-50);
  padding: 0.1875rem 0.5625rem;
  border-radius: var(--radius-full);
  margin-left: auto;
  white-space: nowrap;
}

.resultado-conteudo {
  display: flex;
  flex-direction: column;
}

.resultado-linha {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-3) 0;
  border-bottom: 1px solid var(--navy-100);
}

.resultado-linha:first-child {
  padding-top: 0;
}

.resultado-linha:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.resultado-label {
  color: var(--navy-400);
  font-size: var(--text-sm);
}

.resultado-valor {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--navy-700);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.resultado-total {
  border-bottom: none;
  border-top: 2px solid var(--navy-200);
  margin-top: var(--spacing-2);
  padding-top: var(--spacing-4);
  padding-bottom: 0;
}

.resultado-total .resultado-label,
.resultado-total .resultado-valor {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--green-600);
}

.card-highlight .resultado-total .resultado-label,
.card-highlight .resultado-total .resultado-valor {
  font-size: var(--text-xl);
}

.parcelas-pendentes-lista {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.parcela-pendente-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-3) 0;
  border-bottom: 1px solid var(--navy-100);
}

.parcela-pendente-item:first-child {
  padding-top: 0;
}

.parcela-pendente-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.parcela-pendente-data {
  font-size: var(--text-sm);
  color: var(--navy-400);
}

.parcela-pendente-valor {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--navy-700);
  font-variant-numeric: tabular-nums;
}

.rodape {
  text-align: center;
  padding: var(--spacing-6) 0;
  margin-top: auto;
  font-size: var(--text-xs);
  color: var(--navy-300);
  border-top: 1px solid var(--navy-100);
}

[hidden] {
  display: none !important;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.resultado {
  animation: fadeInUp var(--transition-slow) ease-out;
}

@media (min-width: 480px) {
  .container {
    padding: var(--spacing-8) var(--spacing-6);
    gap: var(--spacing-6);
  }

  .cabecalho {
    padding: var(--spacing-12) var(--spacing-4) var(--spacing-6);
  }

  .cabecalho h1 {
    font-size: var(--text-2xl);
  }

  .cabecalho-sub {
    font-size: var(--text-base);
  }

  .card {
    padding: var(--spacing-6);
  }

  .formulario {
    flex-direction: row;
    align-items: flex-end;
    gap: var(--spacing-3);
  }

  .formulario .label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }

  .select-wrapper {
    flex: 1;
  }

  .btn {
    width: auto;
    white-space: nowrap;
    padding: 0.8125rem 2rem;
  }
}

@media (min-width: 768px) {
  .container {
    padding: var(--spacing-10);
    gap: var(--spacing-8);
  }

  .cabecalho {
    padding: var(--spacing-16) var(--spacing-4) var(--spacing-8);
  }

  .cabecalho h1 {
    font-size: var(--text-3xl);
  }

  .card {
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
  }

  .resultado-titulo {
    font-size: var(--text-lg);
  }

  .resultado-label {
    font-size: var(--text-base);
  }

  .resultado-valor {
    font-size: var(--text-base);
  }

  .resultado-total .resultado-label,
  .resultado-total .resultado-valor {
    font-size: var(--text-xl);
  }
}