/* ==========================================================================
   Calculadora de Crecimiento del Capital - Estilos CSS (100% Estático y Autónomo)
   ========================================================================== */

:root {
  /* Paleta de colores profesional y accesible (WCAG AA) */
  --color-primary: #1e3a8a;       /* Azul marino financiero */
  --color-primary-hover: #172554;
  --color-primary-light: #eff6ff;
  --color-secondary: #0d9488;     /* Verde azulado para intereses */
  --color-secondary-light: #f0fdfa;
  --color-accent: #3b82f6;        /* Azul brillante para total */
  --color-deposit: #64748b;       /* Gris pizarra para capital aportado */
  
  --color-bg-body: #f8fafc;
  --color-bg-card: #ffffff;
  --color-bg-input: #ffffff;
  --color-border: #e2e8f0;
  --color-border-focus: #3b82f6;
  
  --color-text-main: #0f172a;
  --color-text-muted: #475569;
  --color-text-light: #64748b;
  
  --color-warning-bg: #fffbeb;
  --color-warning-border: #fde68a;
  --color-warning-text: #92400e;
  
  --color-error-text: #b91c1c;
  --color-error-bg: #fef2f2;
  --color-error-border: #fecaca;

  --color-success-badge: #dcfce7;
  --color-success-text: #166534;

  /* Tipografía y espaciado */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
}

/* Reset y caja base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg-body);
  color: var(--color-text-main);
  padding: 0.5rem;
  min-height: 100vh;
}

@media (min-width: 640px) {
  body {
    padding: 1.25rem 1rem;
  }
}

@media (min-width: 768px) {
  body {
    padding: 2rem 1.5rem;
  }
}

/* Contenedor principal */
.app-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

/* Encabezado */
.app-header {
  text-align: center;
  margin-bottom: 0.875rem;
}

.app-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

@media (min-width: 640px) {
  .app-header {
    margin-bottom: 1.5rem;
  }
  .app-title {
    font-size: 1.75rem;
    line-height: 1.25;
    margin-bottom: 0.5rem;
  }
}

@media (min-width: 768px) {
  .app-header {
    margin-bottom: 2rem;
  }
  .app-title {
    font-size: 2.25rem;
  }
}

.app-subtitle {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .app-subtitle {
    font-size: 1rem;
  }
}

/* Layout principal de dos columnas en escritorio */
.calculator-layout {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

@media (min-width: 640px) {
  .calculator-layout {
    gap: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .calculator-layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    align-items: start;
    gap: 1.75rem;
  }
}

/* Tarjetas y Contenedores */
.card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  box-shadow: var(--shadow-sm);
}

@media (min-width: 640px) {
  .card {
    border-radius: var(--radius-lg);
    padding: 1.25rem;
  }
}

@media (min-width: 768px) {
  .card {
    padding: 1.75rem;
  }
}

.card-header {
  margin-bottom: 0.625rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.4rem;
}

@media (min-width: 640px) {
  .card-header {
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
  }
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

@media (min-width: 640px) {
  .card-title {
    font-size: 1.25rem;
    gap: 0.5rem;
  }
}

/* Formulario */
.form-group {
  margin-bottom: 0.75rem;
}

@media (min-width: 640px) {
  .form-group {
    margin-bottom: 1.25rem;
  }
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--color-text-main);
  margin-bottom: 0.2rem;
}

@media (min-width: 640px) {
  .form-label {
    font-size: 0.9375rem;
    margin-bottom: 0.35rem;
  }
}

.required-badge {
  color: var(--color-error-text);
  margin-left: 2px;
}

.help-text {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

@media (min-width: 640px) {
  .help-text {
    font-size: 0.8125rem;
    margin-top: 0.25rem;
  }
}

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

.form-input, .form-select {
  width: 100%;
  min-height: 38px;
  padding: 0.4rem 0.75rem;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--color-text-main);
  background-color: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

@media (min-width: 640px) {
  .form-input, .form-select {
    min-height: 46px;
    padding: 0.625rem 0.875rem;
    font-size: 1rem;
  }
}

.has-suffix {
  padding-right: 2.75rem;
}

.input-suffix {
  position: absolute;
  right: 0.875rem;
  color: var(--color-text-light);
  font-weight: 600;
  font-size: 0.875rem;
  pointer-events: none;
}

@media (min-width: 640px) {
  .input-suffix {
    font-size: 0.9375rem;
  }
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-input.is-invalid {
  border-color: var(--color-error-text);
  background-color: var(--color-error-bg);
}

.error-msg {
  display: none;
  color: var(--color-error-text);
  font-size: 0.75rem;
  font-weight: 500;
  margin-top: 0.25rem;
}

.error-msg.active {
  display: block;
}

/* Botones de acción */
.button-group {
  display: flex;
  flex-direction: row;
  gap: 0.5rem;
  margin-top: 0.875rem;
}

@media (min-width: 640px) {
  .button-group {
    gap: 0.75rem;
    margin-top: 1.5rem;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0.45rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  text-decoration: none;
  flex: 1;
}

@media (min-width: 640px) {
  .btn {
    min-height: 46px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
  }
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

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

.btn-primary:active {
  transform: translateY(1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: #f1f5f9;
  color: var(--color-text-main);
}

/* Alerta de interés negativo */
.alert {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  font-size: 0.8125rem;
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
}

@media (min-width: 640px) {
  .alert {
    padding: 0.875rem 1rem;
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
    gap: 0.5rem;
  }
}

.alert-warning {
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  color: var(--color-warning-text);
}

/* Sección de Resultados */
.results-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .results-section {
    gap: 1.5rem;
  }
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.4rem;
}

@media (min-width: 640px) {
  .results-grid {
    gap: 1rem;
  }
  
  .results-grid .result-card.highlight {
    grid-column: span 2;
  }
}

@media (min-width: 1024px) {
  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.result-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.6rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

@media (min-width: 640px) {
  .result-card {
    padding: 1.25rem;
  }
}

.result-card.highlight {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
  color: #ffffff;
  border: none;
  box-shadow: var(--shadow-md);
  padding: 0.625rem 0.75rem;
}

@media (min-width: 640px) {
  .result-card.highlight {
    padding: 1.25rem;
  }
}

.result-card.highlight .result-label {
  color: #bfdbfe;
  font-size: 0.75rem;
}

@media (min-width: 640px) {
  .result-card.highlight .result-label {
    font-size: 0.875rem;
  }
}

.result-card.highlight .result-value {
  color: #ffffff;
  font-size: 1.35rem;
  line-height: 1.2;
}

@media (min-width: 640px) {
  .result-card.highlight .result-value {
    font-size: 1.875rem;
  }
}

.result-card.highlight .result-sub {
  color: #93c5fd;
  font-size: 0.6875rem;
}

@media (min-width: 640px) {
  .result-card.highlight .result-sub {
    font-size: 0.8125rem;
  }
}

.result-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 0.15rem;
  line-height: 1.2;
}

@media (min-width: 640px) {
  .result-label {
    font-size: 0.875rem;
    margin-bottom: 0.35rem;
  }
}

.result-value {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--color-text-main);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (min-width: 400px) {
  .result-value {
    font-size: 1.05rem;
  }
}

@media (min-width: 640px) {
  .result-value {
    font-size: 1.5rem;
  }
}

.result-value.text-secondary {
  color: var(--color-secondary);
}

.result-value.text-deposit {
  color: var(--color-deposit);
}

.result-sub {
  font-size: 0.625rem;
  color: var(--color-text-light);
  margin-top: 0.1rem;
  line-height: 1.15;
}

@media (min-width: 640px) {
  .result-sub {
    font-size: 0.8125rem;
    margin-top: 0.25rem;
  }
}

/* Barra de desglose visual */
.breakdown-section {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.625rem;
}

@media (min-width: 640px) {
  .breakdown-section {
    padding: 1.25rem;
  }
}

.breakdown-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.35rem;
}

@media (min-width: 640px) {
  .breakdown-title {
    font-size: 0.9375rem;
    margin-bottom: 0.75rem;
  }
}

.breakdown-bar-container {
  height: 12px;
  width: 100%;
  background-color: #e2e8f0;
  border-radius: 999px;
  overflow: hidden;
  display: flex;
  margin-bottom: 0.35rem;
}

@media (min-width: 640px) {
  .breakdown-bar-container {
    height: 20px;
    margin-bottom: 0.75rem;
  }
}

.breakdown-segment {
  height: 100%;
  transition: width 0.4s ease;
}

.segment-deposit {
  background-color: var(--color-deposit);
}

.segment-interest {
  background-color: var(--color-secondary);
}

.breakdown-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.35rem;
  font-size: 0.6875rem;
}

@media (min-width: 640px) {
  .breakdown-legend {
    gap: 0.75rem;
    font-size: 0.8125rem;
  }
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

@media (min-width: 640px) {
  .legend-item {
    gap: 0.5rem;
  }
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

@media (min-width: 640px) {
  .legend-dot {
    width: 10px;
    height: 10px;
  }
}

.legend-dot.dot-deposit {
  background-color: var(--color-deposit);
}

.legend-dot.dot-interest {
  background-color: var(--color-secondary);
}

.legend-dot.dot-total {
  background-color: var(--color-accent);
}

/* Explicación narrativa */
.narrative-box {
  background-color: var(--color-primary-light);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-md);
  padding: 0.5rem 0.625rem;
  color: #1e3a8a;
  font-size: 0.75rem;
  line-height: 1.4;
}

@media (min-width: 640px) {
  .narrative-box {
    padding: 1.125rem;
    font-size: 0.9375rem;
    line-height: 1.6;
  }
}

.narrative-box strong {
  font-weight: 700;
  color: #172554;
}

/* Gráfico */
.chart-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  box-shadow: var(--shadow-sm);
}

@media (min-width: 640px) {
  .chart-card {
    border-radius: var(--radius-lg);
    padding: 1.25rem;
  }
}

.chart-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

@media (min-width: 640px) {
  .chart-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
  }
}

.chart-controls {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

@media (min-width: 640px) {
  .chart-controls {
    gap: 0.5rem;
  }
}

.btn-chart-mode {
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background-color: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  min-height: 32px;
}

@media (min-width: 640px) {
  .btn-chart-mode {
    padding: 0.35rem 0.75rem;
    font-size: 0.8125rem;
    min-height: 36px;
  }
}

.btn-chart-mode.active {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.chart-container {
  position: relative;
  width: 100%;
  height: 320px;
  margin: 1rem 0;
  user-select: none;
}

@media (min-width: 768px) {
  .chart-container {
    height: 380px;
  }
}

.chart-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.chart-tooltip {
  position: absolute;
  background: rgba(15, 23, 42, 0.95);
  color: #ffffff;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  pointer-events: none;
  box-shadow: var(--shadow-lg);
  z-index: 10;
  transition: opacity 0.15s ease, transform 0.15s ease;
  min-width: 160px;
  opacity: 0;
  transform: translate(-50%, -100%);
  margin-top: -10px;
}

.chart-tooltip.visible {
  opacity: 1;
}

.chart-tooltip-title {
  font-weight: 700;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  padding-bottom: 0.25rem;
  margin-bottom: 0.35rem;
}

.chart-tooltip-row {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.2rem;
}

/* Tabla anual */
.table-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  margin-top: 1.5rem;
}

.table-header-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

@media (min-width: 640px) {
  .table-header-container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.table-scroll-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.table-evolution {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  text-align: right;
  white-space: nowrap;
}

.table-evolution th {
  background-color: #f1f5f9;
  color: var(--color-text-main);
  font-weight: 700;
  padding: 0.75rem 0.875rem;
  border-bottom: 2px solid var(--color-border);
  border-left: 1px solid #e2e8f0;
}

.table-evolution th:first-child {
  border-left: none;
  text-align: center;
}

.table-evolution td {
  padding: 0.625rem 0.875rem;
  border-bottom: 1px solid var(--color-border);
  border-left: 1px solid #f1f5f9;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-main);
}

.table-evolution td:first-child {
  border-left: none;
  text-align: center;
  font-weight: 600;
  color: var(--color-text-muted);
}

.table-evolution tbody tr:nth-child(even) {
  background-color: #f8fafc;
}

.table-evolution tbody tr:hover {
  background-color: #f1f5f9;
}

.table-evolution tbody tr.highlight-final-row {
  background-color: #eff6ff;
  font-weight: 700;
}

.table-evolution tbody tr.highlight-final-row td {
  color: var(--color-primary);
  border-top: 2px solid #bfdbfe;
  border-bottom: 2px solid #bfdbfe;
}

/* Notas de pie y privacidad */
.app-footer {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-light);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-align: center;
}

.privacy-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  background-color: #f1f5f9;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  color: var(--color-text-muted);
  font-weight: 500;
  margin: 0 auto;
}

/* Clases de accesibilidad */
.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;
}