:root {
  --color1: #2C3E50; /* azul gris oscuro - header y botón principal */
  --color2: #1ABC9C; /* verde agua suave - hover y acentos */
  --color3: #34495E; /* gris profundo - textos principales */
  --color4: #ECF0F1; /* fondo claro elegante */
  --color5: #E74C3C; /* rojo coral - alertas */

  --bg-light: var(--color4);
  --text-main: var(--color3);
  --header-bg: var(--color1);
  --header-border: var(--color2);
  --brand-color: var(--color2);

  --button-bg: var(--color1);
  --button-hover: var(--color2);

  --calendar-bg: white;
  --calendar-border: var(--color2);
  --calendar-accent: var(--color2);
  --calendar-accent-hover: var(--color1);
  --event-alert: var(--color5);
  --day-highlight: var(--color3);

  --scroll-thumb: #c5c7cb;
}

/* Reset básico */
* {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-main);
  box-sizing: border-box;
}

body {
  margin-top: 20px;
  background-color: var(--bg-light);
  min-height: 100vh;
}

/* Contenido principal */
.main-content {
  margin-left: 220px; /* espacio para sidebar fijo */
  padding: 1rem;
}

/* Menú lateral fijo para escritorio */
nav.d-md-block {
  flex: 0 0 220px;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  background-color: var(--color1);
  padding: 1rem;
  box-sizing: border-box;
  border-right: 1px solid var(--header-border);
  box-shadow: 2px 0 8px rgba(0,0,0,0.1);
  overflow-y: auto;
  z-index: 1000;
}

nav.d-md-block h5,
.sidebar h5,
.offcanvas-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--brand-color);
  margin-bottom: 1rem;
}

/* Sidebar y offcanvas compartiendo estilo de links */
.nav.flex-column .nav-item {
  margin-bottom: 8px; /* espacio vertical entre ítems */
}

.nav.flex-column .nav-link {
  display: block;           /* ocupa todo el ancho del li */
  padding: 0.6rem 0.8rem;   /* más aire interno */
  border-radius: 0.5rem;    /* esquinas redondeadas */
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color4);
  transition: background-color 0.3s ease, color 0.3s ease;
  text-decoration: none;
}

.nav.flex-column .nav-link:hover {
  background-color: var(--color2);
  color: white;
  border-radius: 0.6rem;
}

.nav.flex-column .nav-link.active {
  background-color: var(--calendar-accent);
  color: white;
  box-shadow: inset 2px 0 0 var(--calendar-border);
  border-radius: 0.6rem;
}

/* Sidebar específico */
.sidebar {
  background-color: var(--color1);
  color: white;
  height: 100%;
  padding: 1rem;
  border-right: 1px solid var(--header-border);
  box-shadow: 2px 0 8px rgba(0,0,0,0.1);
}

/* Offcanvas móvil */
.offcanvas {
  background-color: var(--color1);
  color: white;
}

.offcanvas-header {
  border-bottom: 1px solid var(--header-border);
}

.offcanvas-body {
  padding: 1rem 0;
}

/* Botón hamburguesa móvil */
.btn-menu-hamburguesa {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 2000;
  background-color: var(--button-bg);
  border-radius: 6px;
  padding: 0.4rem 0.8rem;
  font-size: 1.3rem;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  border: none;
  color: white;
  transition: background-color 0.3s ease;
}

.btn-menu-hamburguesa:hover {
  background-color: var(--button-hover);
}

/* Responsive: ocultar sidebar fijo en móvil */
@media (max-width: 1023px) {
  nav.d-md-block {
    display: none;
  }
  .main-content {
    margin-left: 0;
    max-width: 100vw;
    padding: 1rem;
  }
}