:root {
  /* Categorías de presión */
  --c-zero: #b91c1c;   /* cero / casi nula */
  --c-bad:  #d97706;   /* mala presión */
  --c-ok:   #16a34a;   /* óptima */
  --c-over: #7c3aed;   /* sobrepresión */

  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #334155;
  --accent: #38bdf8;
}

* { box-sizing: border-box; }

/* Login */
.login-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
/* El atributo `hidden` debe ganar al display:flex de arriba. */
.login-overlay[hidden] { display: none; }
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  width: min(360px, 92vw);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-align: center;
}
.login-card h1 { margin: 0; }
.login-card input {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  font-size: 1rem;
}
.login-card button { padding: 0.6rem; font-size: 1rem; }

.app-header { position: relative; }
.logout-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.app-header {
  padding: 0.9rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
}
.app-header h1 { margin: 0; font-size: 1.8rem; }
.subtitle { color: var(--muted); margin: 0.25rem 0 0; }
.brand { font-size: 1.25rem; font-weight: 700; }

.toolbar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.toolbar[hidden] { display: none; }
.toolbar button { font-size: 0.95rem; }

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}
.card h2 { margin-top: 0; font-size: 1.15rem; }

.muted { color: var(--muted); }
.muted.empty { text-align: center; padding: 2rem 0; }

.file-row {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

input[type="file"] {
  color: var(--text);
}

.inline-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.inline-label input[type="date"] {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
}

button {
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--accent);
  color: #06283d;
  font-weight: 600;
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
}
button.ghost {
  background: transparent;
  color: var(--text);
}
button:hover { filter: brightness(1.1); }

.status {
  margin: 0.75rem 0 0;
  min-height: 1.2em;
  font-size: 0.95rem;
}
.status.error { color: var(--c-zero); }
.status.ok { color: var(--c-ok); }

/* Umbrales */
.thresholds {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.thresholds label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
}
.thresholds input {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
  font-size: 1rem;
}

.dot {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  margin-right: 4px;
}
.dot-zero { background: var(--c-zero); }
.dot-bad { background: var(--c-bad); }
.dot-ok { background: var(--c-ok); }

/* Calibración */
.calib-rows {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.calib-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.calib-row input {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
  font-size: 1rem;
  width: 150px;
}
.calib-arrow { color: var(--muted); font-size: 1.1rem; }
.calib-del {
  padding: 0.35rem 0.6rem;
  line-height: 1;
}
.calib-del:disabled { opacity: 0.4; cursor: not-allowed; }

/* Leyenda */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.legend-item { display: flex; align-items: center; gap: 0.4rem; }
.swatch {
  width: 14px; height: 14px;
  border-radius: 3px;
  display: inline-block;
}
.sw-zero { background: var(--c-zero); }
.sw-bad { background: var(--c-bad); }
.sw-ok { background: var(--c-ok); }
.sw-over { background: var(--c-ok); box-shadow: inset 0 0 0 2px var(--c-over); }

/* Gráficas — una por línea (ancho completo) */
.charts {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.day-chart {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem;
}
.day-chart h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  text-transform: capitalize;
}
.chart-canvas-wrap {
  position: relative;
  height: 240px;
}

/* Barra de categorías por franja, bajo cada gráfica */
.cat-bar {
  display: flex;
  width: 100%;
  height: 16px;
  margin-top: 6px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.cat-seg { flex: 1 1 0; min-width: 0; }

/* Encabezado de grupo (barras / gráficas) */
.group-h {
  margin: 0.25rem 0 0.1rem;
  font-size: 1rem;
  color: var(--accent);
}

/* Fila de la sección "todas las barras": etiqueta + barra + regla horaria */
.band-row { display: flex; flex-direction: column; gap: 0; }
.band-label { font-size: 0.85rem; color: var(--muted); }

.cat-bar-wrap { position: relative; margin-top: 3px; }
.cat-bar-wrap .cat-bar { margin-top: 0; }

/* Líneas verticales de referencia sobre la barra:
   tenues cada hora (24 divisiones) + marcadas cada 3 h (8 divisiones). */
.hour-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      to right,
      transparent 0,
      transparent calc(100% / 24 - 1px),
      rgba(226, 232, 240, 0.18) calc(100% / 24 - 1px),
      rgba(226, 232, 240, 0.18) calc(100% / 24)
    ),
    repeating-linear-gradient(
      to right,
      transparent 0,
      transparent calc(100% / 8 - 1px),
      rgba(226, 232, 240, 0.45) calc(100% / 8 - 1px),
      rgba(226, 232, 240, 0.45) calc(100% / 8)
    );
}

/* Regla de horas bajo la barra */
.hour-axis {
  position: relative;
  height: 14px;
  margin-bottom: 2px;
}
.hour-tick {
  position: absolute;
  transform: translateX(-50%);
  font-size: 0.62rem;
  color: var(--muted);
  white-space: nowrap;
}
.hour-tick:first-child { transform: translateX(0); }
.hour-tick:last-child { transform: translateX(-100%); }

/* Controles (navegación de semana + granularidad) */
.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.week-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.week-label {
  font-weight: 600;
  min-width: 220px;
  text-align: center;
}
.week-nav button:disabled { opacity: 0.35; cursor: not-allowed; }
#granSel {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  font-size: 0.95rem;
}

button.danger {
  border-color: var(--c-zero);
  color: var(--c-zero);
}

/* Resumen */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  margin: 0.75rem 0 1rem;
}
.stat {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
}
.stat-dot {
  width: 12px; height: 12px; border-radius: 50%;
  flex: 0 0 auto;
}
.stat-value { font-size: 1.35rem; font-weight: 700; }
.stat-label { color: var(--muted); font-size: 0.85rem; }

.summary-h { font-size: 1rem; margin: 1rem 0 0.4rem; }
.best-hours {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--c-ok);
  margin: 0.2rem 0 0.5rem;
}

.hour-strip {
  display: grid;
  grid-template-columns: repeat(24, 1fr);
  gap: 2px;
}
.hour-cell {
  height: 34px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  color: #fff;
  opacity: 0.9;
}
.hour-cell span { text-shadow: 0 1px 1px rgba(0,0,0,0.5); }

/* Sobrepresión: verde (suficiente) con borde morado de aviso, sin líneas
   verticales entre franjas contiguas (solo arriba y abajo). */
.cat-seg.seg-over {
  box-shadow: inset 0 2px 0 var(--c-over), inset 0 -2px 0 var(--c-over);
}
.hour-cell.seg-over {
  box-shadow: inset 0 0 0 2px var(--c-over);
}

/* ===== Modales ===== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.7);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 4vh 1rem;
  overflow-y: auto;
  z-index: 200;
}
.modal[hidden] { display: none; }
.modal-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  width: min(680px, 96vw);
  position: relative;
}
.modal-box h2 { margin-top: 0; }
.modal-close {
  position: absolute;
  top: 0.6rem; right: 0.6rem;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.25rem 0.55rem;
}
.modal-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

/* Info de días cargados */
.days-info { max-height: 320px; overflow-y: auto; }
.day-info-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  text-transform: capitalize;
}

/* Calibración (modal) */
.calib-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem;
  margin-bottom: 0.9rem;
  background: var(--bg);
}
.calib-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.calib-dates {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}
.calib-date-label {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.8rem;
  color: var(--muted);
}
.calib-date-label input,
.calib-row input {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  font-size: 0.95rem;
}
.calib-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}
.calib-row input { width: 140px; }
.calib-arrow { color: var(--muted); }
.calib-del { padding: 0.3rem 0.55rem; line-height: 1; }
.calib-del:disabled { opacity: 0.4; cursor: not-allowed; }
.calib-eq { margin: 0.5rem 0 0; }