* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: #f4f5f7;
  color: #1c1c1c;
}

/* ---- Login ---- */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0f3a63 url('logo.jpg') center center / cover no-repeat;
}
.login-card {
  background: rgba(255,255,255,0.97);
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.35);
  width: 100%;
  max-width: 380px;
  text-align: center;
}
.login-card h1 {
  margin: 0 0 6px;
  font-size: 22px;
}
.subtitulo {
  margin: 0 0 24px;
  color: #666;
  font-size: 14px;
}
.boton-zoho {
  display: block;
  width: 100%;
  padding: 12px;
  background: #d6482f;
  color: #fff;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}
.boton-zoho:hover { background: #b83a24; }
.alerta {
  background: #fdecea;
  color: #a31414;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 14px;
  margin-bottom: 16px;
}

/* ---- Panel ---- */
.panel-body { min-height: 100vh; display: flex; flex-direction: column; }
.panel-header {
  background: #1a1a1a;
  color: #fff;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
}
.panel-header .salir {
  color: #fff;
  text-decoration: underline;
}
.panel-layout {
  position: relative;
  flex: 1;
  display: flex;
  min-height: 0;
}
.lista-pdfs {
  width: 260px;
  flex-shrink: 0;
  background: #fff;
  border-right: 1px solid #e0e0e0;
  padding: 20px;
  overflow-y: auto;
}
.lista-pdfs-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.lista-pdfs h2 {
  font-size: 15px;
  margin: 0;
  color: #444;
}
.btn-colapsar {
  background: #f0f0f0;
  border: none;
  border-radius: 4px;
  width: 26px;
  height: 26px;
  font-size: 14px;
  cursor: pointer;
  color: #444;
  flex-shrink: 0;
}
.btn-colapsar:hover { background: #e2e2e2; }

.resizer {
  width: 6px;
  flex-shrink: 0;
  cursor: col-resize;
  background: transparent;
}
.resizer:hover { background: #d0d0d0; }

.btn-expandir {
  display: none;
  position: absolute;
  top: 70px;
  left: 0;
  z-index: 5;
  background: #1a1a1a;
  color: #fff;
  border: none;
  border-radius: 0 4px 4px 0;
  width: 26px;
  height: 32px;
  font-size: 14px;
  cursor: pointer;
}

.panel-layout.colapsado .lista-pdfs,
.panel-layout.colapsado .resizer {
  display: none;
}
.panel-layout.colapsado .btn-expandir {
  display: block;
}
.lista-pdfs ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.item-pdf {
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  margin-bottom: 6px;
  border: none;
  background: #f0f0f0;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}
.item-pdf:hover { background: #e2e2e2; }
.visor { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.sin-archivos { margin: auto; color: #777; }

.visor-iframe {
  flex: 1;
  border: none;
  width: 100%;
  height: 100%;
  background: #fff;
}

@media (max-width: 700px) {
  .panel-layout { flex-direction: column; }
  .lista-pdfs { width: 100%; border-right: none; border-bottom: 1px solid #e0e0e0; }
  .visor-iframe { min-height: 70vh; }
}