:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #16a34a;
  --accent-dark: #15803d;
  --danger: #dc2626;
  --warn: #d97706;
  --radius: 10px;
}

* { box-sizing: border-box; }

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

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #111827;
  color: #fff;
  padding: 0 24px;
  height: 56px;
}
.brand { font-weight: 700; font-size: 18px; }
.brand span { color: #9ca3af; font-weight: 400; }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.bot-toggle { display: flex; align-items: center; gap: 8px; margin: 0; }
.bot-label { color: #d1d5db; font-size: 13px; }
.pill {
  border: 0; cursor: pointer; border-radius: 999px;
  padding: 4px 14px; font-weight: 700; font-size: 12px; letter-spacing: .5px;
}
.pill.on { background: var(--accent); color: #fff; }
.pill.off { background: #4b5563; color: #e5e7eb; }
.logout { color: #d1d5db; text-decoration: none; font-size: 14px; }
.logout:hover { color: #fff; }

/* Tabs */
.tabs {
  display: flex;
  gap: 4px;
  background: #1f2937;
  padding: 0 16px;
}
.tabs a {
  color: #9ca3af; text-decoration: none;
  padding: 12px 18px; font-size: 14px; font-weight: 500;
  border-bottom: 3px solid transparent;
}
.tabs a:hover { color: #e5e7eb; }
.tabs a.active { color: #fff; border-bottom-color: var(--accent); }

/* Content */
.content { max-width: 1000px; margin: 24px auto; padding: 0 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
}
.card h2 { margin: 0 0 4px; font-size: 16px; }
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.card-head h2 { margin: 0; }
.card-head form { margin: 0; }
.hint, .empty { color: var(--muted); font-size: 13px; margin: 4px 0 16px; }
.empty { padding: 20px 0; text-align: center; }

/* Forms */
label { display: block; margin-bottom: 14px; font-size: 13px; font-weight: 600; color: #374151; }
input, textarea, select {
  width: 100%;
  margin-top: 5px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  font-weight: 400;
  background: #fff;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: transparent; }
textarea { resize: vertical; }

.btn {
  border: 0; cursor: pointer; border-radius: 8px;
  padding: 9px 16px; font: inherit; font-weight: 600; font-size: 14px;
  background: #e5e7eb; color: #111827;
}
.btn:hover { filter: brightness(.97); }
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-dark); }
.btn.small { padding: 5px 10px; font-size: 13px; }
.btn.link { background: none; color: var(--accent); padding: 0; }
.btn.danger { background: none; color: var(--danger); }
.btn.ghost { background: none; border: 1px solid var(--line); }

/* Fila de alta rápida */
.row-form { display: flex; gap: 10px; align-items: flex-start; flex-wrap: wrap; }
.row-form input { flex: 1; min-width: 160px; margin-top: 0; }
.row-form .btn { white-space: nowrap; }

/* Tables */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); font-size: 14px; vertical-align: middle; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
tr.inactiva td, tr.nohay td { opacity: .5; }
td input { margin-top: 0; }
.acciones { white-space: nowrap; text-align: right; }
.acciones form { display: inline; }

/* Badges */
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.badge.hay { background: #dcfce7; color: var(--accent-dark); }
.badge.nohay { background: #fee2e2; color: var(--danger); }
.badge.estado { background: #e5e7eb; color: #374151; }

.precio { font-variant-numeric: tabular-nums; font-weight: 600; }

/* Flash */
.flash { padding: 11px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.flash.ok { background: #dcfce7; color: var(--accent-dark); }
.flash.error { background: #fee2e2; color: var(--danger); }

/* Import / preview */
.import-box { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.preview { border: 2px dashed var(--warn); background: #fffbeb; }
.preview .preview-meta { color: var(--warn); font-weight: 600; font-size: 13px; margin-bottom: 12px; }

/* Sub-nav Operación */
.subnav { display: flex; gap: 6px; margin-bottom: 16px; }
.subnav a {
  text-decoration: none; color: var(--muted); font-size: 14px; font-weight: 600;
  padding: 7px 14px; border-radius: 8px; background: #fff; border: 1px solid var(--line);
}
.subnav a.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Login */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: #111827; }
.login-card { background: #fff; padding: 32px; border-radius: 14px; width: 320px; }
.login-card h1 { font-size: 18px; margin: 0 0 20px; text-align: center; }
.login-card .btn { width: 100%; margin-top: 6px; }