/* =====================================================
   USEM Documentos — Sistema de Diseño v2.0
   Instituto Universitario USEM
   ===================================================== */

:root {
  --u-primary:       #1a3560;
  --u-primary-hover: #0f2040;
  --u-primary-rgb:   26, 53, 96;
  --u-gold:          #c9a227;
  --u-gold-dark:     #a0801c;
  --u-gold-bg:       #fdf6e0;
  --u-success:       #0a7c59;
  --u-success-bg:    #d1fae5;
  --u-danger:        #b91c1c;
  --u-danger-bg:     #fee2e2;
  --u-bg:            #eef2f7;
  --u-surface:       #ffffff;
  --u-border:        #cdd5e0;
  --u-border-light:  #e8ecf3;
  --u-text:          #1a2332;
  --u-muted:         #6b7a99;
  --u-radius:        10px;
  --u-radius-sm:     6px;
  --u-shadow:        0 1px 3px rgba(26,53,96,.07), 0 4px 14px rgba(26,53,96,.06);
  --u-shadow-lg:     0 8px 40px rgba(26,53,96,.15);
  --u-tr:            .18s ease;
}

/* ---- Reset & base ---- */
.usem-doc-body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: var(--u-bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--u-text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.usem-doc-body *,
.usem-doc-body *::before,
.usem-doc-body *::after {
  box-sizing: border-box;
}

/* ============================================================
   LOGIN PAGE
   ============================================================ */
.usem-login-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 24px;
  background: linear-gradient(150deg, #0b1d3a 0%, #1a3560 55%, #1e4880 100%);
}

.usem-login-brand {
  text-align: center;
  margin-bottom: 28px;
  color: #fff;
}

.usem-login-brand .brand-icon {
  font-size: 3.2rem;
  display: block;
  margin-bottom: 10px;
}

.usem-login-brand h1 {
  font-size: 1.3rem;
  font-weight: 800;
  margin: 0 0 4px;
  color: #fff;
  letter-spacing: -.02em;
}

.usem-login-brand p {
  font-size: 0.82rem;
  color: rgba(255,255,255,.6);
  margin: 0;
}

.usem-login-card {
  background: var(--u-surface);
  border-radius: 18px;
  box-shadow: var(--u-shadow-lg), 0 0 0 1px rgba(255,255,255,.05);
  padding: 36px 38px 40px;
  width: 100%;
  max-width: 400px;
}

.usem-login-card h2 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--u-primary);
  margin: 0 0 22px;
  padding-bottom: 14px;
  border-bottom: 3px solid var(--u-gold);
  display: flex;
  align-items: center;
  gap: 8px;
}

.usem-login-footer {
  margin-top: 14px;
  font-size: 0.78rem;
  color: rgba(255,255,255,.45);
  text-align: center;
}

/* ============================================================
   CAMPOS DE FORMULARIO
   ============================================================ */
.usem-field {
  margin-bottom: 16px;
}

.usem-field label {
  display: block;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--u-muted);
  margin-bottom: 6px;
}

.usem-field input[type="text"],
.usem-field input[type="password"],
.usem-field input[type="number"],
.usem-field input[type="email"],
.usem-field select,
.usem-field textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--u-border);
  border-radius: var(--u-radius-sm);
  font-size: 0.92rem;
  color: var(--u-text);
  background: #fff;
  transition: border-color var(--u-tr), box-shadow var(--u-tr);
  outline: none;
  appearance: none;
}

.usem-field input:focus,
.usem-field select:focus,
.usem-field textarea:focus {
  border-color: var(--u-primary);
  box-shadow: 0 0 0 3px rgba(var(--u-primary-rgb), .11);
}

.usem-field input[readonly],
.usem-field input:disabled {
  background: #f0f4f9;
  color: var(--u-muted);
}

/* ============================================================
   BOTONES
   ============================================================ */
.usem-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: var(--u-radius-sm);
  border: none;
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--u-tr);
  white-space: nowrap;
  line-height: 1;
}

.usem-btn-primary {
  background: var(--u-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(var(--u-primary-rgb), .28);
}
.usem-btn-primary:hover {
  background: var(--u-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(var(--u-primary-rgb), .32);
}

.usem-btn-gold {
  background: var(--u-gold);
  color: #fff;
  box-shadow: 0 2px 8px rgba(201,162,39,.3);
}
.usem-btn-gold:hover { background: var(--u-gold-dark); }

.usem-btn-ghost {
  background: transparent;
  color: var(--u-primary);
  border: 1.5px solid var(--u-border);
}
.usem-btn-ghost:hover { background: var(--u-bg); border-color: var(--u-primary); }

.usem-btn-danger {
  background: var(--u-danger);
  color: #fff;
}
.usem-btn-danger:hover { background: #991818; }

.usem-btn-salir {
  background: rgba(255,255,255,.12);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.28);
  padding: 8px 18px;
  font-size: 0.82rem;
  border-radius: 999px;
}
.usem-btn-salir:hover { background: rgba(255,255,255,.22); }

.usem-btn-sm {
  padding: 6px 14px;
  font-size: 0.78rem;
}

.usem-btn-block {
  width: 100%;
  margin-top: 8px;
}

.usem-link-btn {
  background: none;
  border: none;
  color: var(--u-primary);
  text-decoration: underline;
  cursor: pointer;
  font-size: 0.82rem;
  padding: 0;
}
.usem-link-btn-danger { color: var(--u-danger); }

/* ============================================================
   MENSAJES FLASH
   ============================================================ */
.usem-flash {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--u-radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  margin: 0 0 16px;
  line-height: 1.4;
}
.usem-flash-ok {
  background: var(--u-success-bg);
  color: var(--u-success);
  border-left: 4px solid var(--u-success);
}
.usem-flash-error {
  background: var(--u-danger-bg);
  color: var(--u-danger);
  border-left: 4px solid var(--u-danger);
}

/* ============================================================
   PANEL LAYOUT — Estructura principal (topbar + nav + content)
   ============================================================ */
.usem-panel-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--u-bg);
}

/* ---- Top bar ---- */
.usem-topbar {
  background: var(--u-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  height: 58px;
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 2px 10px rgba(0,0,0,.25);
  flex-shrink: 0;
}

.usem-topbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.usem-topbar-brand .tb-icon {
  font-size: 1.6rem;
  line-height: 1;
}

.usem-topbar-title {
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: -.01em;
  color: #fff;
}

.usem-topbar-subtitle {
  font-size: 0.78rem;
  font-weight: 400;
  color: rgba(255,255,255,.65);
  margin-left: 6px;
}

.usem-topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.usem-topbar-user {
  font-size: 0.78rem;
  color: rgba(255,255,255,.7);
  max-width: 200px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---- Nav tabs ---- */
.usem-nav {
  background: var(--u-primary);
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 0 28px;
  display: flex;
  align-items: flex-end;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  flex-shrink: 0;
}
.usem-nav::-webkit-scrollbar { display: none; }

.usem-nav a,
.usem-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px 11px;
  font-size: 0.82rem;
  font-weight: 600;
  color: rgba(255,255,255,.7);
  text-decoration: none;
  border-radius: var(--u-radius-sm) var(--u-radius-sm) 0 0;
  border: none;
  background: none;
  cursor: pointer;
  transition: color var(--u-tr), background var(--u-tr);
  white-space: nowrap;
  letter-spacing: .01em;
}

.usem-nav a:hover,
.usem-nav-btn:hover {
  color: #fff;
  background: rgba(255,255,255,.09);
}

.usem-nav a.activo {
  color: var(--u-primary);
  background: var(--u-bg);
  font-weight: 800;
  border-top: 3px solid var(--u-gold);
  padding-top: 7px;
}

/* ---- Barra de búsqueda inmersiva (solo en Folios Capturados) ---- */
.usem-searchbar {
  background: rgba(10, 28, 64, 0.92);
  padding: 12px 32px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.usem-searchbar-form {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 500px;
}

.usem-searchbar input[type="text"] {
  flex: 1;
  padding: 9px 18px;
  border-radius: 999px;
  border: none;
  font-size: 0.88rem;
  background: rgba(255,255,255,.16);
  color: #fff;
  outline: none;
  transition: background var(--u-tr);
  min-width: 0;
}
.usem-searchbar input[type="text"]::placeholder { color: rgba(255,255,255,.5); }
.usem-searchbar input[type="text"]:focus { background: rgba(255,255,255,.24); }

.usem-searchbar-label {
  font-size: 0.78rem;
  color: rgba(255,255,255,.55);
  white-space: nowrap;
}

.usem-searchbar .usem-btn-sm {
  padding: 8px 18px;
  font-size: 0.8rem;
  background: var(--u-gold);
  color: #fff;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  font-weight: 700;
}
.usem-searchbar .usem-btn-sm:hover { background: var(--u-gold-dark); }

.usem-searchbar-result {
  font-size: 0.78rem;
  color: rgba(255,255,255,.5);
}

/* ---- Área de contenido ---- */
.usem-content {
  flex: 1;
  padding: 28px 32px;
}

/* ============================================================
   CARDS
   ============================================================ */
.usem-card {
  background: var(--u-surface);
  border-radius: var(--u-radius);
  box-shadow: var(--u-shadow);
  border: 1px solid var(--u-border-light);
  margin-bottom: 24px;
  overflow: hidden;
}

.usem-card-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--u-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: #fafbfd;
}

.usem-card-header h2 {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--u-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.usem-card-body {
  padding: 24px;
}

/* ============================================================
   GRILLA DE FORMULARIO
   ============================================================ */
.usem-form-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.usem-form-row-2 {
  grid-template-columns: repeat(2, 1fr);
}

.usem-form-row .usem-field,
.usem-form-row-2 .usem-field {
  margin-bottom: 0;
}

.usem-section-divider {
  border: none;
  border-top: 1px solid var(--u-border-light);
  margin: 20px 0;
}

.usem-section-label {
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--u-muted);
  margin: 0 0 14px;
}

.usem-form-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 20px;
  flex-wrap: wrap;
}

/* ============================================================
   FILAS DE ARCHIVOS (subida dinámica)
   ============================================================ */
.usem-archivos-lista {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.usem-archivo-fila {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 12px;
  align-items: end;
  padding: 14px;
  background: #f8fafe;
  border: 1.5px solid var(--u-border-light);
  border-radius: var(--u-radius-sm);
}

.usem-archivo-fila .usem-field {
  margin-bottom: 0;
}

.usem-nuevo-tipo-wrap {
  display: none;
  grid-column: 1 / 3;
  padding-top: 4px;
}

.usem-nuevo-tipo-wrap.visible {
  display: block;
}

.usem-btn-add-file {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 9px 18px;
  background: var(--u-bg);
  border: 2px dashed var(--u-border);
  border-radius: var(--u-radius-sm);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--u-primary);
  cursor: pointer;
  transition: all var(--u-tr);
  width: 100%;
  justify-content: center;
}
.usem-btn-add-file:hover {
  border-color: var(--u-primary);
  background: rgba(var(--u-primary-rgb), .04);
}

.usem-btn-remove-file {
  background: var(--u-danger-bg);
  color: var(--u-danger);
  border: none;
  border-radius: var(--u-radius-sm);
  padding: 10px 12px;
  font-size: 1rem;
  cursor: pointer;
  line-height: 1;
  transition: background var(--u-tr);
  align-self: end;
  font-weight: 700;
}
.usem-btn-remove-file:hover { background: #fcc; }

/* Archivos existentes en edición */
.usem-archivos-existentes {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.usem-archivo-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: #f4f7fd;
  border-radius: var(--u-radius-sm);
  border: 1px solid var(--u-border-light);
}

.usem-archivo-item-icon { font-size: 1.3rem; flex-shrink: 0; }
.usem-archivo-item-info { flex: 1; min-width: 0; }

.usem-archivo-item-nombre {
  font-weight: 700;
  font-size: 0.83rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--u-text);
}

.usem-archivo-item-meta {
  font-size: 0.73rem;
  color: var(--u-muted);
  margin-top: 2px;
}

/* ============================================================
   TABLA
   ============================================================ */
.usem-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}

.usem-table thead th {
  text-align: left;
  padding: 10px 16px;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--u-muted);
  border-bottom: 2px solid var(--u-border-light);
  background: #f7fafd;
  white-space: nowrap;
}

.usem-table tbody tr {
  border-bottom: 1px solid var(--u-border-light);
  transition: background var(--u-tr);
}

.usem-table tbody tr:hover { background: #f3f7fc; }
.usem-table tbody tr:last-child { border-bottom: none; }

.usem-table td {
  padding: 12px 16px;
  vertical-align: middle;
}

.usem-table td.u-bold { font-weight: 700; color: var(--u-primary); }

/* ---- Badges ---- */
.usem-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: .02em;
}

.usem-badge-success { background: var(--u-success-bg); color: var(--u-success); }
.usem-badge-muted   { background: #eef0f6; color: var(--u-muted); }
.usem-badge-danger  { background: var(--u-danger-bg); color: var(--u-danger); }
.usem-badge-gold    { background: var(--u-gold-bg); color: var(--u-gold-dark); }

/* ---- Acciones en tabla ---- */
.usem-table-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

/* ---- Empty state ---- */
.usem-empty {
  text-align: center;
  padding: 52px 24px;
  color: var(--u-muted);
}
.usem-empty-icon  { font-size: 3rem; display: block; margin-bottom: 14px; opacity: .6; }
.usem-empty-title { font-size: 1rem; font-weight: 800; margin: 0 0 6px; color: var(--u-text); }
.usem-empty-desc  { font-size: 0.83rem; margin: 0; }

/* ============================================================
   MODAL DE CONFIRMACIÓN (PIN)
   ============================================================ */
.usem-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(8,18,38,.6);
  z-index: 9000;
  align-items: center;
  justify-content: center;
  padding: 24px;
  backdrop-filter: blur(2px);
}
.usem-modal-overlay.activo { display: flex; }

.usem-modal {
  background: var(--u-surface);
  border-radius: 14px;
  box-shadow: var(--u-shadow-lg);
  padding: 28px 32px 30px;
  max-width: 380px;
  width: 100%;
  animation: usem-modal-in .18s ease;
}

@keyframes usem-modal-in {
  from { transform: scale(.94); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

.usem-modal h3 {
  font-size: 1rem;
  font-weight: 800;
  margin: 0 0 8px;
  color: var(--u-primary);
}
.usem-modal h3.peligro { color: var(--u-danger); }

.usem-modal p {
  font-size: 0.85rem;
  color: var(--u-muted);
  margin: 0 0 20px;
  line-height: 1.5;
}

.usem-modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ============================================================
   CONSULTA PÚBLICA — Página completa
   ============================================================ */
.usem-consulta-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: linear-gradient(155deg, #0b1d3a 0%, #1a3560 55%, #1e4880 100%);
}

.usem-consulta-hero {
  padding: 36px 24px 0;
  text-align: center;
  flex-shrink: 0;
}

.usem-consulta-hero .hero-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 12px;
}

.usem-consulta-hero h1 {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  margin: 0 0 6px;
  letter-spacing: -.025em;
}

.usem-consulta-hero p {
  font-size: 0.85rem;
  color: rgba(255,255,255,.6);
  margin: 0;
}

.usem-consulta-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 20px 40px;
}

.usem-consulta-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
  padding: 36px 40px;
  width: 100%;
  max-width: 460px;
  transition: max-width .28s ease;
}

.usem-consulta-card.usem-resultado-expandido {
  max-width: 720px;
}

.usem-consulta-card h2 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--u-primary);
  margin: 0 0 4px;
}

.usem-consulta-card .u-subtitle {
  font-size: 0.83rem;
  color: var(--u-muted);
  margin: 0 0 24px;
}

.usem-folio-input-wrap {
  display: flex;
  gap: 10px;
  margin-bottom: 6px;
}

.usem-folio-input-wrap input {
  flex: 1;
  padding: 13px 18px;
  border: 2px solid var(--u-border);
  border-radius: var(--u-radius-sm);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  outline: none;
  transition: border-color var(--u-tr), box-shadow var(--u-tr);
}
.usem-folio-input-wrap input:focus {
  border-color: var(--u-primary);
  box-shadow: 0 0 0 3px rgba(var(--u-primary-rgb), .1);
}

.usem-consulta-msg {
  font-size: 0.83rem;
  min-height: 18px;
  color: var(--u-danger);
  margin: 0 0 6px;
  transition: opacity .15s;
}
.usem-consulta-msg.msg-ok { color: var(--u-success); }

.usem-confirmacion-alumno {
  background: #f4f7fd;
  border-radius: var(--u-radius-sm);
  padding: 16px 18px;
  margin-bottom: 18px;
  border-left: 4px solid var(--u-gold);
}

.usem-confirmacion-nombre {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--u-primary);
  margin: 0 0 2px;
}

.usem-confirmacion-curso {
  font-size: 0.82rem;
  color: var(--u-muted);
  margin: 0;
}

/* ---- Encabezado resultado ---- */
.usem-resultado-encabezado {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--u-border-light);
  margin-bottom: 20px;
}

.usem-resultado-avatar {
  font-size: 2.8rem;
  margin-bottom: 10px;
  line-height: 1;
  background: var(--u-gold-bg);
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--u-gold);
}

.usem-resultado-encabezado h2 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--u-primary);
  margin: 0 0 4px;
  letter-spacing: -.02em;
}

.usem-resultado-encabezado .u-subtitle {
  margin: 0 0 10px;
}

/* ---- Lista de archivos ---- */
.usem-archivos-resultado {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.usem-archivos-resultado li a {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: #f4f7fd;
  border-radius: var(--u-radius);
  border: 1.5px solid var(--u-border-light);
  text-decoration: none;
  color: var(--u-text);
  transition: all var(--u-tr);
  border-left: 4px solid var(--u-gold);
}
.usem-archivos-resultado li a:hover {
  background: #e8eef9;
  border-left-color: var(--u-primary);
  color: var(--u-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(var(--u-primary-rgb), .1);
}

.usem-archivos-resultado .file-icon { font-size: 2rem; flex-shrink: 0; }
.usem-archivos-resultado .file-info { flex: 1; min-width: 0; }

.usem-archivos-resultado .file-tipo {
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--u-gold-dark);
  display: block;
  margin-bottom: 2px;
}

.usem-archivos-resultado .file-nombre {
  font-weight: 700;
  font-size: 0.87rem;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--u-text);
}

.usem-archivos-resultado .file-dl {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--u-primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--u-radius-sm);
  font-size: 0.78rem;
  font-weight: 700;
  margin-left: auto;
  flex-shrink: 0;
  white-space: nowrap;
  transition: background var(--u-tr);
}
.usem-archivos-resultado li a:hover .file-dl { background: var(--u-primary-hover); }

.usem-archivo-dl-icon { font-size: 0.95rem; }

.usem-resultado-vacio {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 32px 16px;
  color: var(--u-muted);
  font-size: 0.85rem;
  text-align: center;
}
.usem-resultado-vacio span { font-size: 2.4rem; opacity: .5; }

.usem-consulta-footer {
  text-align: center;
  padding: 14px;
  font-size: 0.72rem;
  color: rgba(255,255,255,.35);
  flex-shrink: 0;
}

/* ============================================================
   SPINNER
   ============================================================ */
.usem-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: u-spin .7s linear infinite;
  vertical-align: middle;
  flex-shrink: 0;
}

.usem-spinner-dark {
  border-color: rgba(26,53,96,.25);
  border-top-color: var(--u-primary);
}

@keyframes u-spin { to { transform: rotate(360deg); } }

/* ============================================================
   UTILITIES
   ============================================================ */
.usem-oculto { display: none !important; }

.u-mt-0 { margin-top: 0; }
.u-mt-12 { margin-top: 12px; }
.u-mt-20 { margin-top: 20px; }

.u-text-muted { color: var(--u-muted); font-size: 0.83rem; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 800px) {
  .usem-topbar { padding: 0 16px; }
  .usem-nav { padding: 0 12px; }
  .usem-content { padding: 16px; }
  .usem-searchbar { padding: 10px 16px; }
  .usem-card-body { padding: 16px; }
  .usem-card-header { padding: 14px 16px; }
  .usem-form-row,
  .usem-form-row-2 { grid-template-columns: 1fr; }
  .usem-archivo-fila { grid-template-columns: 1fr; }
  .usem-consulta-card,
  .usem-consulta-card.usem-resultado-expandido { padding: 28px 22px; max-width: 100%; }
  .usem-login-card { padding: 28px 24px 32px; }
  .usem-topbar-user { display: none; }
  .usem-archivos-resultado li a { flex-wrap: wrap; }
  .usem-archivos-resultado .file-dl { width: 100%; justify-content: center; margin: 8px 0 0 0; }
}

@media (max-width: 500px) {
  .usem-folio-input-wrap { flex-direction: column; }
  .usem-topbar-title .usem-topbar-subtitle { display: none; }
}