:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --panel: #ffffff;
  --text: #1f2933;
  --muted: #657282;
  --border: #d8dee6;
  --blue: #1769aa;
  --blue-soft: #e7f1fb;
  --red: #b42318;
  --red-soft: #fff1ef;
  --green: #13795b;
  --green-soft: #e7f6ef;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 28px;
  background: #fff;
  border-bottom: 1px solid var(--border);
}
h1, h2 { margin: 0; font-weight: 600; letter-spacing: 0; }
h1 { font-size: 22px; }
h2 { font-size: 15px; }
p { margin: 6px 0 0; color: var(--muted); }
.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.status-pill {
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green);
  border: 1px solid #b7e2d0;
  white-space: nowrap;
}
.layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.85fr) minmax(420px, 1.15fr);
  gap: 16px;
  padding: 16px;
  max-width: 1500px;
  margin: 0 auto;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}
.stack { display: flex; flex-direction: column; gap: 12px; }
.wide { min-width: 0; }
.full { grid-column: 1 / -1; }
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.compact { margin-top: 4px; }
.grid { display: grid; gap: 10px; }
.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
label { display: flex; flex-direction: column; gap: 6px; color: #334155; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 9px 10px;
  font: inherit;
  color: var(--text);
  background: #fff;
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: #85b7eb;
  box-shadow: 0 0 0 2px #e6f1fb;
}
textarea { resize: vertical; min-height: 90px; }
.mono { font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace; font-size: 13px; }
.tall { min-height: 205px; }
.small { min-height: 80px; }
.editor { min-height: 250px; }
button {
  border: 1px solid #145c96;
  background: var(--blue);
  color: #fff;
  border-radius: 6px;
  padding: 9px 13px;
  font: inherit;
  cursor: pointer;
}
button:hover { filter: brightness(0.96); }
button:disabled { opacity: 0.55; cursor: not-allowed; }
button.ghost {
  background: #fff;
  color: var(--blue);
  border-color: #9ac3e8;
}
button.danger {
  background: var(--red);
  border-color: #9a1c13;
}
.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.upload-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
}
.file-picker {
  border: 1px dashed #9ac3e8;
  border-radius: 8px;
  padding: 10px;
  background: #f8fbff;
}
.file-picker input {
  margin-top: 6px;
  padding: 7px;
}
.checkline { flex-direction: row; align-items: center; gap: 8px; }
.checkline input, .segmented input { width: auto; }
.segmented {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 9px;
  background: #fbfcfd;
}
.segmented label { flex-direction: row; align-items: center; gap: 6px; }
.hint { font-size: 13px; }
.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}
.metrics div {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  background: #fbfcfd;
}
.metrics span { display: block; font-size: 24px; font-weight: 600; }
.metrics small { color: var(--muted); }
.progress {
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: #edf1f5;
  border: 1px solid var(--border);
}
#progressBar {
  width: 0%;
  height: 100%;
  background: var(--blue);
  transition: width 0.2s ease;
}
.messages {
  max-height: 180px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fbfcfd;
  padding: 8px;
  min-height: 74px;
}
.message { padding: 4px 0; color: #334155; }
.message.error { color: var(--red); }
.preview {
  display: grid;
  gap: 10px;
}
.preview-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  background: #fff;
}
.preview-item strong { display: block; margin-bottom: 4px; }
.preview-body {
  max-height: 160px;
  overflow: auto;
  border-top: 1px solid var(--border);
  margin-top: 8px;
  padding-top: 8px;
  white-space: pre-wrap;
  color: #334155;
}
.table-wrap { overflow: auto; border: 1px solid var(--border); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; min-width: 980px; }
th, td {
  border-bottom: 1px solid var(--border);
  padding: 9px 10px;
  text-align: left;
  vertical-align: top;
}
th { background: #f4f6f8; font-weight: 600; color: #334155; }
td { color: #334155; }
.badge {
  display: inline-flex;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.badge.sent { color: var(--green); background: var(--green-soft); border-color: #b7e2d0; }
.badge.failed { color: var(--red); background: var(--red-soft); border-color: #ffc9c2; }
.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login-shell { width: 100%; max-width: 420px; }
.login-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
}
.login-title { margin-bottom: 18px; }
.login-message {
  min-height: 20px;
  color: var(--red);
}
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .two { grid-template-columns: 1fr; }
  .upload-row { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .topbar { align-items: flex-start; flex-direction: column; }
}