/* ==========================================================================
   Fijate Tools - Calibración de pulverizador fitosanitario
   Diseño canónico: Inter, Outfit, JetBrains Mono, Midnight Slate y alto contraste.
   ========================================================================== */

:root {
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Tema claro */
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --bg-input: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #0284c7;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --brand-blue: #0284c7;
  --brand-blue-hover: #0369a1;
  --brand-blue-subtle: rgba(2, 132, 199, 0.12);

  /* Estados de contraste seguro (Lección 282) */
  --state-warn-bg: #fef3c7;
  --state-warn-border: #fde68a;
  --state-warn-text: #92400e;

  --state-danger-bg: #fee2e2;
  --state-danger-border: #fecaca;
  --state-danger-text: #991b1b;

  --state-success-bg: #dcfce7;
  --state-success-border: #bbf7d0;
  --state-success-text: #166534;

  --state-info-bg: #e0f2fe;
  --state-info-border: #bae6fd;
  --state-info-text: #075985;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

[data-theme="dark"] {
  --bg-page: #0b0f17;
  --bg-card: #111827;
  --bg-card-subtle: #1e293b;
  --bg-input: #1e293b;
  --border-color: #334155;
  --border-focus: #38bdf8;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  --brand-blue: #38bdf8;
  --brand-blue-hover: #0284c7;
  --brand-blue-subtle: rgba(56, 189, 248, 0.16);

  /* Modo oscuro accesible */
  --state-warn-bg: rgba(245, 158, 11, 0.16);
  --state-warn-border: rgba(245, 158, 11, 0.35);
  --state-warn-text: #fde68a;

  --state-danger-bg: rgba(239, 68, 68, 0.16);
  --state-danger-border: rgba(239, 68, 68, 0.35);
  --state-danger-text: #fca5a5;

  --state-success-bg: rgba(34, 197, 94, 0.16);
  --state-success-border: rgba(34, 197, 94, 0.35);
  --state-success-text: #86efac;

  --state-info-bg: rgba(14, 165, 233, 0.16);
  --state-info-border: rgba(14, 165, 233, 0.35);
  --state-info-text: #7dd3fc;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6,
.brand-title,
.section-title,
.hero-title,
.faq-section-title {
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
}

.mono, code, .metric-value, .boquilla-badge {
  font-family: var(--font-mono);
}

/* Barra de suite */
.suite-nav-strip {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 0.6rem 1rem;
}

.suite-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: thin;
}

.suite-nav-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.suite-links {
  display: flex;
  gap: 0.5rem;
}

.suite-link-item {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-secondary);
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  transition: all 0.15s ease;
}

.suite-link-item:hover {
  background: var(--border-color);
  color: var(--text-primary);
}

.suite-link-item.active {
  background: var(--brand-blue);
  color: #ffffff;
  border-color: var(--brand-blue);
}

/* Layout principal */
.tool-layout {
  max-width: 1200px;
  width: 100%;
  margin: 1.5rem auto 3rem;
  padding: 0 1rem;
}

.tool-with-sidebar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 1536px) {
  .tool-with-sidebar {
    grid-template-columns: 1fr 300px;
  }
}

.card-main {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

@media (min-width: 768px) {
  .card-main {
    padding: 2rem;
  }
}

/* Cabecera hero */
.hero-header {
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.65rem;
  background: var(--brand-blue-subtle);
  color: var(--brand-blue);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  margin-bottom: 0.6rem;
}

.hero-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 0.5rem;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 800px;
}

/* Modos de cálculo principales */
.tabs-mode-strip {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  scrollbar-width: thin;
}

.mode-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
  min-height: 42px;
}

.mode-tab-btn:hover {
  background: var(--border-color);
  color: var(--text-primary);
}

.mode-tab-btn.active {
  background: var(--brand-blue);
  color: #ffffff;
  border-color: var(--brand-blue);
  box-shadow: 0 2px 6px rgba(2, 132, 199, 0.25);
}

/* Grid de paneles */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 992px) {
  .calc-grid {
    grid-template-columns: 460px 1fr;
  }
}

/* Paneles de sección */
.section-box {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.section-box:last-child {
  margin-bottom: 0;
}

.box-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.box-title svg {
  color: var(--brand-blue);
}

/* Formularios responsivos */
.form-group {
  margin-bottom: 0.9rem;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.form-hint {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-muted);
}

.form-control,
.form-select {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  min-height: 42px;
  padding: 0.55rem 0.8rem;
  font-family: var(--font-main);
  font-size: 0.9rem;
  color: var(--text-primary);
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-select {
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  padding-right: 40px;
  cursor: pointer;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.18);
}

/* Input en flexbox con sufijo */
.input-with-suffix {
  display: flex;
  align-items: stretch;
  width: 100%;
}

.input-with-suffix .form-control {
  flex: 1 1 0%;
  width: 0;
  min-width: 0;
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.input-suffix {
  display: inline-flex;
  align-items: center;
  padding: 0 0.8rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: none;
  border-top-right-radius: var(--radius-sm);
  border-bottom-right-radius: var(--radius-sm);
  white-space: nowrap;
}

/* Grids compactos */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

/* Sliders interactivos con medidor */
.slider-group {
  margin-top: 0.4rem;
}

.slider-input {
  width: 100%;
  accent-color: var(--brand-blue);
  cursor: pointer;
  height: 6px;
}

/* Selector de boquillas visual (Muestra el color ISO real) */
.boquillas-iso-picker {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.boquilla-btn {
  border: 2px solid transparent;
  padding: 0.5rem 0.25rem;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  transition: transform 0.1s ease, box-shadow 0.15s ease;
  min-height: 48px;
}

.boquilla-btn:hover {
  transform: translateY(-2px);
}

.boquilla-btn.active {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 2px var(--border-focus);
}

.boquilla-btn-code {
  font-size: 0.85rem;
}

.boquilla-btn-sub {
  font-size: 0.65rem;
  opacity: 0.9;
}

/* Panel de resultados principales */
.results-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Gran tarjeta KPI de volumen l/ha */
.kpi-volumen-card {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.kpi-volumen-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, #0284c7, #38bdf8);
}

.kpi-volumen-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--brand-blue);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}

.kpi-volumen-value {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.kpi-volumen-unit {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* Sub-métricas */
.kpi-submetrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.submetric-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  text-align: center;
}

.submetric-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 0.15rem;
}

.submetric-val {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Visualizador gráfico de la barra pulverizadora */
.spray-visualizer {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.spray-svg-container {
  width: 100%;
  height: 110px;
  background: var(--bg-page);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--border-color);
  margin-top: 0.5rem;
}

/* Manómetro interactivo */
.manometro-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card-subtle);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  margin-top: 0.5rem;
}

.manometro-badge {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--brand-blue);
  min-width: 85px;
  text-align: right;
}

.manometro-scale {
  flex: 1;
}

/* Tarjeta de preparación de cuba */
.tank-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.tank-detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.88rem;
}

.tank-detail-row:last-child {
  border-bottom: none;
}

.tank-label {
  color: var(--text-secondary);
}

.tank-val {
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

/* Alertas de contraste accesible (Lección 282) */
.state-alert {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  line-height: 1.45;
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

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

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

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

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

/* Botón principal */
.btn-action-primary {
  width: 100%;
  min-height: 46px;
  padding: 0.75rem 1.25rem;
  background: var(--brand-blue);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.92rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
  box-shadow: 0 2px 4px rgba(2, 132, 199, 0.25);
}

.btn-action-primary:hover {
  background: var(--brand-blue-hover);
}

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

/* Modales canónicos sin alertas (Regla de oro) */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11, 15, 23, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 680px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: translateY(12px);
  transition: transform 0.2s ease;
}

.modal-overlay.open .modal-dialog {
  transform: translateY(0);
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close-btn:hover {
  background: var(--bg-card-subtle);
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  background: var(--bg-card-subtle);
}

.btn-secondary {
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
}

/* Guía SEO y FAQ */
.seo-guide-section {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.guide-block {
  margin-bottom: 1.75rem;
}

.guide-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
}

.guide-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card-subtle);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 1rem 1.25rem;
  text-align: left;
  border: none;
  background: transparent;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-answer {
  padding: 0 1.25rem 1rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Impresión */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }
  .app-header,
  .suite-nav-strip,
  .tools-ad-banner-section,
  .tool-ad-sidebar,
  .fijate-footer,
  .btn-action-primary,
  .header-actions,
  .tabs-mode-strip {
    display: none !important;
  }
  .tool-layout {
    max-width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  .card-main {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
  }
}