:root {
  --bg: #f4f5f8;
  --panel: #ffffff;
  --panel-alt: #eef0f4;
  --border: #dde1e8;
  --text: #1a1f2b;
  --text-dim: #6b7280;
  --accent: #2563eb;
  --green: #15803d;
  --red: #dc2626;
  --amber: #b45309;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
}

/* --- login --- */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 320px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.login-card h1 { font-size: 18px; margin: 0 0 8px; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-dim); }
.login-card input {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  color: var(--text);
  font-size: 14px;
}
.login-card button {
  margin-top: 8px;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  padding: 10px;
  color: white;
  font-weight: 600;
  cursor: pointer;
}
.alert {
  background: rgba(220, 38, 38, 0.08);
  border: 1px solid var(--red);
  color: #991b1b;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
}

/* --- dashboard shell --- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.topbar h1 { font-size: 16px; margin: 0; }
.topbar .who { color: var(--text-dim); font-size: 13px; }
.topbar a { color: var(--text-dim); text-decoration: none; margin-left: 14px; }
.topbar a:hover { color: var(--text); }

.container { padding: 18px 20px 40px; max-width: 1400px; margin: 0 auto; }

/* --- filters --- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
  align-items: center;
}
.filters select, .filters input {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 10px;
  color: var(--text);
  font-size: 13px;
}
.filters input[type="search"] { min-width: 220px; }
.filters .live-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green);
  display: inline-block;
  margin-right: 6px;
  animation: pulse 1.6s infinite;
}
@keyframes pulse {
  0% { opacity: 1; } 50% { opacity: 0.3; } 100% { opacity: 1; }
}

/* --- stat cards --- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.card .label { color: var(--text-dim); font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
.card .value { font-size: 26px; font-weight: 700; margin-top: 4px; }
.card.green .value { color: var(--green); }
.card.red .value { color: var(--red); }
.card.amber .value { color: var(--amber); }

/* --- panels --- */
.grid-2 {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 18px;
}
@media (max-width: 900px) { .grid-2 { grid-template-columns: 1fr; } }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.panel h2 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.03em; color: var(--text-dim); margin: 0 0 12px; }

/* --- tables --- */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; color: var(--text-dim); font-weight: 600; padding: 6px 8px; border-bottom: 1px solid var(--border); font-size: 12px; }
td { padding: 6px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
tr:hover td { background: var(--panel-alt); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
.truncate { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}
.badge.d { background: rgba(21, 128, 61, 0.1); color: var(--green); }
.badge.b { background: rgba(220, 38, 38, 0.1); color: var(--red); }
.badge.t { background: rgba(180, 83, 9, 0.1); color: var(--amber); }

.dt-fast { color: var(--green); }
.dt-medium { color: var(--amber); }
.dt-slow { color: var(--red); font-weight: 600; }

.events-wrap { max-height: 560px; overflow-y: auto; }

.empty { color: var(--text-dim); padding: 20px; text-align: center; }

/* --- recipient history modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal-overlay.hidden { display: none; }
.modal-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 900px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}
.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-header h2 { margin: 0; font-size: 16px; word-break: break-all; }
.modal-subtitle { color: var(--text-dim); font-size: 13px; margin-top: 4px; }
.modal-close {
  background: none;
  border: none;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  color: var(--text-dim);
  padding: 0 4px;
}
.modal-close:hover { color: var(--text); }
.modal-body { padding: 12px 20px 20px; overflow-y: auto; }

.recipient-link { cursor: pointer; text-decoration: underline dotted; text-underline-offset: 2px; }
.recipient-link:hover { color: var(--accent); }

.page-intro { color: var(--text-dim); font-size: 13px; margin-bottom: 16px; max-width: 900px; }
.inline-label { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-dim); }
.inline-label input {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  color: var(--text);
}
.btn-refresh {
  background: var(--accent);
  border: none;
  border-radius: 6px;
  padding: 7px 14px;
  color: white;
  font-size: 13px;
  cursor: pointer;
}