:root {
    --bg: #0e0e10;
    --surface: #18181c;
    --surface2: #222228;
    --border: #2e2e38;
    --border2: #3a3a48;
    --text: #f0f0f5;
    --muted: #8888a0;
    --accent: #6c63ff;
    --accent2: #9d97ff;
    --green: #22c55e;
    --amber: #f59e0b;
    --red: #ef4444;
    --blue: #3b82f6;
    --radius: 14px;
    --radius-sm: 8px;
    font-family: 'DM Sans', sans-serif;
  }

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

  body {
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
  }

  /* Sidebar */
  .sidebar {
    width: 240px;
    min-height: 100vh;
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 28px 0;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
  }

  .logo {
    padding: 0 24px 32px;
    font-family: 'Syne', sans-serif;
    font-size: 20px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .logo-icon {
    width: 34px; height: 34px;
    background: var(--accent);
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px;
  }

  .nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 11px 24px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--muted);
    border-left: 2px solid transparent;
    transition: all .2s;
  }

  .nav-item:hover { color: var(--text); background: var(--surface2); }

  .nav-item.active {
    color: var(--accent2);
    border-left-color: var(--accent);
    background: rgba(108,99,255,.08);
  }

  .nav-icon { font-size: 18px; width: 20px; text-align: center; }

  .nav-section {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--border2);
    padding: 20px 24px 8px;
  }

  /* Main content */
  .main {
    margin-left: 240px;
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }

  .topbar {
    height: 64px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 32px;
    gap: 16px;
    position: sticky; top: 0; z-index: 50;
  }

  .page-title {
    font-family: 'Syne', sans-serif;
    font-size: 18px;
    font-weight: 700;
    flex: 1;
  }

  .api-url-input {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--muted);
    font-size: 12px;
    padding: 6px 12px;
    width: 280px;
    font-family: monospace;
    outline: none;
    transition: border-color .2s;
  }

  .api-url-input:focus { border-color: var(--accent); color: var(--text); }

  .content {
    padding: 32px;
    flex: 1;
  }

  /* Tab pages */
  .tab-page { display: none; }
  .tab-page.active { display: block; }

  /* Cards grid for dashboard */
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 28px;
  }

  .stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    position: relative;
    overflow: hidden;
  }

  .stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--accent-color, var(--accent));
  }

  .stat-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--muted);
    margin-bottom: 10px;
    font-weight: 600;
  }

  .stat-value {
    font-family: 'Syne', sans-serif;
    font-size: 28px;
    font-weight: 700;
    line-height: 1;
    color: var(--text);
  }

  .stat-sub {
    font-size: 12px;
    color: var(--muted);
    margin-top: 6px;
  }

  .charts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 28px;
  }

  .chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  min-width: 0;        /* ← esto */
  overflow: visible;    /* ← y esto */
}


  .chart-card canvas {
    max-height: 300px;
  }

  .chart-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
  }

  /* Upload zone */
  .upload-zone {
    border: 2px dashed var(--border2);
    border-radius: var(--radius);
    padding: 60px;
    text-align: center;
    cursor: pointer;
    transition: all .25s;
    background: var(--surface);
    position: relative;
    overflow: hidden;
  }

  .upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--accent);
    background: rgba(108,99,255,.05);
  }

  .upload-icon { font-size: 48px; margin-bottom: 16px; display: block; }

  .upload-title {
    font-family: 'Syne', sans-serif;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .upload-sub { color: var(--muted); font-size: 14px; margin-bottom: 24px; }

  #file-input { display: none; }

  .btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all .2s;
    font-family: 'DM Sans', sans-serif;
  }

  .btn-primary {
    background: var(--accent);
    color: #fff;
  }
  .btn-primary:hover { background: #7c74ff; transform: translateY(-1px); }

  .btn-ghost {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--border);
  }
  .btn-ghost:hover { color: var(--text); border-color: var(--border2); }

  .btn-danger {
    background: rgba(239,68,68,.12);
    color: var(--red);
    border: 1px solid rgba(239,68,68,.25);
  }
  .btn-danger:hover { background: rgba(239,68,68,.2); }

  .upload-progress {
    margin-top: 24px;
    background: var(--surface2);
    border-radius: var(--radius);
    padding: 20px;
    display: none;
  }

  .progress-bar-wrap {
    background: var(--border);
    border-radius: 99px;
    height: 6px;
    margin: 12px 0;
    overflow: hidden;
  }

  .progress-bar {
    height: 100%; border-radius: 99px;
    background: var(--accent);
    transition: width .4s;
  }

  /* Template hint */
  .template-hint {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-top: 20px;
  }

  .template-hint-title {
    font-size: 13px; font-weight: 600;
    color: var(--accent2);
    margin-bottom: 10px;
  }

  .template-cols {
    display: flex; flex-wrap: wrap; gap: 8px;
  }

  .col-badge {
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 6px;
    padding: 4px 10px;
    font-size: 12px;
    font-family: monospace;
    color: var(--text);
  }

  .col-badge.required { border-color: var(--accent); color: var(--accent2); }

  /* Table */
  .table-controls {
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
  }

  .search-input {
    flex: 1; min-width: 200px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 14px;
    padding: 9px 14px;
    outline: none;
    transition: border-color .2s;
    font-family: 'DM Sans', sans-serif;
  }
  .search-input:focus { border-color: var(--accent); }
  .search-input::placeholder { color: var(--muted); }

  select.filter-select {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 14px;
    padding: 9px 14px;
    outline: none;
    cursor: pointer;
    font-family: 'DM Sans', sans-serif;
  }

  input[type="date"].filter-select {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 14px;
    padding: 9px 12px;
    outline: none;
    font-family: 'DM Sans', sans-serif;
    color-scheme: dark;
  }

  .table-wrap {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
  }

  table {
    width: 100%; border-collapse: collapse;
    font-size: 14px;
  }

  thead tr {
    background: var(--surface2);
    border-bottom: 1px solid var(--border);
  }

  th {
    padding: 13px 16px;
    text-align: left;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--muted);
    font-weight: 600;
  }

  tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background .15s;
  }
  tbody tr:last-child { border-bottom: none; }
  tbody tr:hover { background: var(--surface2); }

  td { padding: 13px 16px; }

  .badge {
    display: inline-flex; align-items: center;
    padding: 3px 10px;
    border-radius: 99px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
  }

  .badge-pagado { background: rgba(34,197,94,.12); color: var(--green); }
  .badge-pendiente { background: rgba(245,158,11,.12); color: var(--amber); }
  .badge-vencido { background: rgba(239,68,68,.12); color: var(--red); }
  .badge-cancelado { background: rgba(136,136,160,.12); color: var(--muted); }

  .pagination {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 20px;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--muted);
  }

  .pagination-btns { display: flex; gap: 6px; }

  .pag-btn {
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    background: var(--surface2);
    border: 1px solid var(--border);
    color: var(--text);
    cursor: pointer;
    font-size: 13px;
    transition: all .2s;
  }
  .pag-btn:hover { border-color: var(--accent); color: var(--accent2); }
  .pag-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
  .pag-btn:disabled { opacity: .4; cursor: default; }

  /* Alert */
  .alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-bottom: 16px;
    display: none;
  }
  .alert-success { background: rgba(34,197,94,.1); border: 1px solid rgba(34,197,94,.25); color: var(--green); }
  .alert-error { background: rgba(239,68,68,.1); border: 1px solid rgba(239,68,68,.25); color: var(--red); }

  /* Empty state */
  .empty-state {
    text-align: center;
    padding: 60px;
    color: var(--muted);
  }
  .empty-state .big-icon { font-size: 40px; margin-bottom: 12px; }
  .empty-state p { font-size: 14px; }

  /* Loading */
  .spinner {
    display: inline-block;
    width: 16px; height: 16px;
    border: 2px solid rgba(255,255,255,.2);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .6s linear infinite;
  }
  @keyframes spin { to { transform: rotate(360deg); } }

  /* Export section */
  .export-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    max-width: 560px;
  }

  .export-card h3 {
    font-family: 'Syne', sans-serif;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
  }

  .export-card p {
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 24px;
  }

  .form-group { margin-bottom: 16px; }
  .form-label { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .8px; display: block; margin-bottom: 8px; }

  .top-clientes {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
  }

  .cliente-row {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
  }
  .cliente-row:last-child { border-bottom: none; }

  .cliente-rank {
    font-family: 'Syne', sans-serif;
    font-size: 16px;
    font-weight: 800;
    color: var(--accent2);
    min-width: 24px;
  }

  .cliente-name { flex: 1; font-weight: 500; }
  .cliente-total { color: var(--accent2); font-weight: 600; font-family: monospace; }

  /* ── Hamburger button ──────────────────────────────── */
  .hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px; height: 36px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 8px;
    flex-shrink: 0;
  }
  .hamburger span {
    display: block;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .25s, opacity .25s;
  }
  .hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .hamburger.open span:nth-child(2) { opacity: 0; }
  .hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* ── Overlay ───────────────────────────────────────── */
  .sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.55);
    z-index: 99;
    backdrop-filter: blur(2px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s;
  }
  .sidebar-overlay.visible {
    opacity: 1;
    pointer-events: all;
  }
.chart-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.chart-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.chart-dropdown {
  position: relative;
}

.chart-dd-btn {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.chart-dd-btn:hover {
  border-color: var(--accent);
}

.chart-dd-arrow {
  font-size: 10px;
  opacity: 0.6;
}

.chart-dd-list {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: #1e1e2a;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
  z-index: 100;
  min-width: 120px;
  max-height: 220px;
  overflow-y: auto;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
}

.chart-dropdown.open .chart-dd-list {
  display: block;
}

.chart-dd-item {
  padding: 7px 12px;
  border-radius: 5px;
  font-size: 13px;
  color: var(--text);
  cursor: pointer;
}

.chart-dd-item:hover {
  background: var(--accent);
  color: #fff;
}

.chart-dd-item.active {
  background: rgba(108,99,255,.2);
  color: var(--accent);
  font-weight: 500;
}

.chart-title-row {
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

  /* ── Mobile breakpoint ─────────────────────────────── */
  @media (max-width: 767px) {
  .hamburger { display: flex; }

  .sidebar {
    transform: translateX(-100%);
    transition: transform .3s cubic-bezier(.4,0,.2,1);
    z-index: 200;
    width: 260px;
    padding-bottom: 100px;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay { display: block; }
  .main { margin-left: 0; }

  .topbar { padding: 0 16px; gap: 12px; }
  .api-url-input { display: none; }
  .content { padding: 16px; }

  /* Cards */
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-value { font-size: 16px; }
  .stat-label { font-size: 10px; }
  .stat-card { padding: 14px; }

  /* Gráfico */
  .charts-grid { grid-template-columns: 1fr; display: grid; }
  .chart-title-row { flex-direction: column; align-items: flex-start; gap: 8px; }
  .chart-nav { width: 100%; justify-content: flex-start; }

  /* Top clientes */
  .cliente-name { font-size: 12px; }
  .cliente-total { font-size: 12px; }
  .cliente-row { gap: 8px; }

  /* Filtros */
  .table-controls { flex-direction: column; align-items: stretch; display: flex; margin-bottom: 16px; }
  .search-input { width: 100%; }
  .filter-select, input[type="date"].filter-select { width: 100%; }

  /* Tabla → cards en mobile */
  .table-wrap { background: transparent; border: none; border-radius: 0; }
  table, thead, tbody, th, td, tr { display: block; }
  thead { display: none; }

  tbody tr {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    padding: 16px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px 12px;
  }
  tbody tr:hover { background: var(--surface2); }

  tbody td { padding: 0; border: none; font-size: 13px; }

  tbody td::before {
    content: attr(data-label);
    display: block;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--muted);
    font-weight: 600;
    margin-bottom: 3px;
  }

  tbody td:nth-child(1),
  tbody td:nth-child(2) { grid-column: span 2; }

  tbody td:nth-child(7) { grid-column: span 1; }
  tbody td:nth-child(8) { grid-column: span 2; }
  tbody td:nth-child(8) > div { flex-wrap: wrap; }

  .upload-zone { padding: 36px 20px; }
  .upload-title { font-size: 18px; }
  .export-card { max-width: 100%; }

  .pagination { flex-direction: column; gap: 10px; align-items: flex-start; }
}