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

  /* Modo Oscuro (Midnight Slate oficial) */
  --bg-body: #07090e;
  --bg-card: #0d121d;
  --bg-card-subtle: #121826;
  --bg-input: #151d2f;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #3b82f6;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: rgba(59, 130, 246, 0.15);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

[data-theme="light"] {
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --bg-input: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #2563eb;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: rgba(37, 99, 235, 0.1);
}

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

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

h1, h2, h3, h4, h5, h6,
.section-title,
.hero-title {
  font-family: var(--font-heading);
}

.mono,
.font-mono,
code {
  font-family: var(--font-mono);
}

.main-wrapper.tool-layout {
  max-width: 1200px;
  width: 100%;
  margin: 1.5rem auto 3rem;
  padding: 0 1rem;
  flex: 1 0 auto;
}

.tool-with-sidebar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

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

.tool-main-content {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Tarjeta principal */
.card-main {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.tool-header-intro {
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.tool-header-intro h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.tool-header-intro p {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Pestañas de operación */
.op-tabs-nav {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  background: var(--bg-card-subtle);
  padding: 0.35rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.op-tab-btn {
  flex: 1;
  min-height: 42px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.15s ease;
}

.op-tab-btn:hover {
  color: var(--text-main);
}

.op-tab-btn.is-active {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(59, 130, 246, 0.3);
}

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

@media (min-width: 900px) {
  .calc-workbench {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

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

@media (min-width: 600px) {
  .form-grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.form-select {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  height: 42px;
  padding: 0 40px 0 0.85rem;
  font-family: var(--font-main);
  font-size: 0.9rem;
  color: var(--text-main);
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  cursor: pointer;
  transition: border-color 0.15s ease;
}

.form-select:focus,
.form-input:focus {
  outline: none;
  border-color: var(--border-focus);
}

.input-unit-wrap {
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  height: 42px;
  overflow: hidden;
}

.input-unit-wrap:focus-within {
  border-color: var(--border-focus);
}

.form-input {
  flex: 1 1 0%;
  width: 0;
  min-width: 0;
  height: 100%;
  padding: 0 0.75rem;
  border: none;
  background: transparent;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.input-unit {
  padding: 0 0.75rem;
  color: var(--text-dim);
  font-size: 0.825rem;
  font-family: var(--font-mono);
  background: var(--bg-card-subtle);
  height: 100%;
  display: flex;
  align-items: center;
  border-left: 1px solid var(--border-color);
}

/* Columna lateral de telemetría */
.telemetry-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.svg-diagram-box {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.telemetry-kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.telemetry-card {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem;
}

.telemetry-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.25rem;
}

.telemetry-value {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
}

.telemetry-value-highlight {
  color: var(--accent);
}

/* Medidor de carga de máquina */
.machine-load-meter {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.meter-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
}

.meter-title {
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.meter-stat {
  font-family: var(--font-mono);
  color: var(--text-main);
  font-weight: 700;
}

.meter-bar-track {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 5px;
  overflow: hidden;
}

.meter-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.25s ease, background-color 0.25s ease;
}

/* Alertas técnicas */
.mach-alerts-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.mach-alert-box {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  line-height: 1.4;
}

.mach-alert-box svg {
  flex-shrink: 0;
  margin-top: 1px;
}

.mach-alert-danger {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.mach-alert-warning {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #fcd34d;
}

.mach-alert-info {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
}

/* Guía técnica y fórmulas */
.tech-guide-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.tech-guide-section h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-main);
}

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

@media (min-width: 768px) {
  .guide-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.guide-item {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.guide-item h4 {
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.guide-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}