:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --border: #dfe3ea;
  --text: #1c2430;
  --muted: #6b7384;
  --accent: #2f6fed;
  --danger: #d83a3a;
  --ok: #1f9d57;
  --input-bg: #ffffff;
}

* { box-sizing: border-box; }

/* El atributo hidden debe ocultar siempre, incluso sobre reglas con display. */
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.centered {
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1.5rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.topbar nav { display: flex; gap: 1rem; align-items: center; }
.topbar a { color: var(--accent); text-decoration: none; }

.layout {
  max-width: 1000px;
  margin: 1.5rem auto;
  padding: 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 1px 3px rgba(16, 24, 40, 0.06);
}
.card.login { width: 340px; }

h1, h2, h3 { margin-top: 0; }

.muted { color: var(--muted); font-size: 0.9rem; }
.error { color: var(--danger); }

label { display: block; margin: 0.5rem 0; font-size: 0.9rem; color: var(--muted); }
input, select, textarea {
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.55rem 0.65rem;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(47, 111, 237, 0.15);
}
textarea { resize: vertical; font-family: ui-monospace, monospace; }
label.check, label.check input { display: inline-flex; width: auto; }
label.check { align-items: center; gap: 0.5rem; }

button {
  padding: 0.55rem 1rem;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  font: inherit;
  cursor: pointer;
}
button.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
button svg { vertical-align: -2px; pointer-events: none; }

/* botones de acción con icono + texto */
.actions { gap: 0.4rem; flex-wrap: wrap; }
.actions button {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.7rem;
  font-size: 0.85rem;
}
.actions button:hover { background: var(--bg); border-color: var(--accent); color: var(--accent); }
.actions button.danger:hover { border-color: var(--danger); color: var(--danger); }
button.link { background: none; border: none; color: var(--muted); cursor: pointer; padding: 0; }
button:hover { filter: brightness(1.1); }

.row { display: flex; gap: 0.75rem; align-items: center; }
.row.between { justify-content: space-between; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 1rem; }
.grid .span2 { grid-column: 1 / -1; }

fieldset { border: 1px solid var(--border); border-radius: 8px; padding: 0.5rem 1rem 1rem; }
legend { color: var(--muted); padding: 0 0.4rem; }

table { width: 100%; border-collapse: collapse; margin-top: 0.75rem; }
th, td { text-align: left; padding: 0.55rem 0.5rem; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 0.85rem; }
td .row { gap: 0.4rem; }

/* panel de actividad */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.6rem;
  margin-top: 0.75rem;
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.7rem 0.9rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.stat.wide { grid-column: 1 / -1; }
.stat-num { font-size: 1.5rem; font-weight: 700; }
.stat-lbl { color: var(--muted); font-size: 0.8rem; }
.stat.ok .stat-num { color: var(--ok); }
.stat.bad .stat-num { color: var(--danger); }
.stat.warn .stat-num { color: #c77c1c; }

.badge {
  display: inline-block;
  padding: 0.12rem 0.5rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid transparent;
}
.badge.sent    { background: #e3f6ec; color: #1f7a45; border-color: #b6e3c8; }
.badge.failed  { background: #fde7e7; color: #b32626; border-color: #f3c2c2; }
.badge.retry   { background: #fff4e0; color: #b5751a; border-color: #f1d9ad; }
.badge.expired { background: #eef0f3; color: #5b6473; border-color: #d7dce3; }
.badge.queued  { background: #e7f0fe; color: #2f6fed; border-color: #c3d8fb; }

.modal {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
}
.modal .card { width: 460px; }
.token {
  display: block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem;
  margin: 0.75rem 0;
  word-break: break-all;
  font-family: ui-monospace, monospace;
}