* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #f0f2f5;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-soft: #eef2ff;
  --success-bg: #f0fdf4;
  --success-fg: #166534;
  --success-border: #bbf7d0;
  --error-bg: #fef2f2;
  --error-fg: #991b1b;
  --error-border: #fecaca;
}
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Login */
.login-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}
.card {
  background: var(--card);
  border-radius: 12px;
  padding: 32px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}
.card h1 { font-size: 18px; font-weight: 600; margin-bottom: 24px; }
label { display: block; font-size: 13px; font-weight: 500; color: #555; margin-bottom: 6px; }
input[type="text"], input[type="password"], input[type="number"], textarea, select {
  width: 100%; border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px; font-size: 14px; color: var(--text);
  outline: none; transition: border-color .15s; background: white;
}
input:focus, textarea:focus, select:focus { border-color: var(--primary); }
button.primary {
  background: var(--primary); color: white; border: none;
  border-radius: 8px; padding: 10px 16px; font-size: 14px; font-weight: 500;
  cursor: pointer; transition: background .15s;
}
button.primary:hover { background: var(--primary-hover); }
button.primary:disabled { background: #a5b4fc; cursor: not-allowed; }
button.ghost {
  background: transparent; color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 14px; font-size: 14px; cursor: pointer;
}
button.ghost:hover { background: #f3f4f6; }
button.danger-ghost {
  background: transparent; color: var(--error-fg); border: 1px solid var(--error-border);
  border-radius: 6px; padding: 4px 8px; font-size: 12px; cursor: pointer;
}
.alert { margin-top: 12px; padding: 10px 12px; border-radius: 8px; font-size: 13px; display: none; }
.alert.success { background: var(--success-bg); color: var(--success-fg); border: 1px solid var(--success-border); }
.alert.error   { background: var(--error-bg);   color: var(--error-fg);   border: 1px solid var(--error-border); }

/* App layout */
.app-shell { max-width: 1200px; margin: 0 auto; padding: 24px; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.topbar h1 { font-size: 20px; font-weight: 600; }
.toolbar {
  display: flex; gap: 12px; align-items: center;
  background: white; border: 1px solid var(--border);
  border-radius: 12px; padding: 12px; margin-bottom: 16px;
}
.toolbar input[type="search"] { flex: 1; }
.toolbar label.toggle { display: flex; align-items: center; gap: 6px; font-size: 13px; margin: 0; cursor: pointer; }

/* Table */
.table-wrap { background: white; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead th {
  background: #f9fafb; text-align: left; padding: 10px 12px;
  font-weight: 600; color: #374151; border-bottom: 1px solid var(--border);
  font-size: 12px; text-transform: uppercase; letter-spacing: .03em;
}
tbody td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #fafbff; }
.cust { font-weight: 500; }
.cust small { display: block; color: var(--muted); font-weight: 400; font-size: 12px; }
.split-cell .pill {
  display: inline-block; background: var(--primary-soft); color: var(--primary);
  padding: 2px 8px; border-radius: 999px; font-size: 12px; margin: 2px 4px 2px 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.split-cell .pill .wid { max-width: 110px; display: inline-block; overflow: hidden; text-overflow: ellipsis; vertical-align: bottom; white-space: nowrap; }
.split-empty { color: var(--muted); }
.empty-state { padding: 40px; text-align: center; color: var(--muted); }
.loading { padding: 40px; text-align: center; color: var(--muted); }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(17,24,39,0.5);
  display: none; align-items: flex-start; justify-content: center;
  padding: 40px 16px; z-index: 50; overflow-y: auto;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: white; border-radius: 12px; width: 100%; max-width: 600px;
  padding: 24px; box-shadow: 0 8px 32px rgba(0,0,0,0.18);
}
.modal h2 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.modal .sub { color: var(--muted); font-size: 13px; margin-bottom: 20px; }
.modal h3 { font-size: 13px; font-weight: 600; color: #374151; text-transform: uppercase; letter-spacing: .03em; margin: 16px 0 8px; }
.current-split { background: #f9fafb; border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; font-size: 13px; }
.warn {
  background: #fffbeb; border: 1px solid #fde68a; color: #92400e;
  padding: 8px 10px; border-radius: 8px; font-size: 12px; margin-top: 8px;
}
.recipient-row {
  display: grid; grid-template-columns: 1fr 130px 110px 32px;
  gap: 8px; align-items: center; margin-bottom: 8px;
}
.recipient-row .type-toggle { display: flex; gap: 6px; font-size: 12px; }
.recipient-row .type-toggle label { display: flex; align-items: center; gap: 3px; margin: 0; cursor: pointer; }
.recipient-row .remove-btn {
  background: transparent; color: var(--error-fg); border: none;
  cursor: pointer; font-size: 18px; padding: 0; line-height: 1;
}
.recipient-row .remove-btn:hover { color: #7f1d1d; }
.add-recipient {
  background: transparent; color: var(--primary); border: 1px dashed var(--primary);
  border-radius: 8px; padding: 6px 10px; font-size: 13px; cursor: pointer; margin-top: 4px;
}
.sum-line { font-size: 12px; color: var(--muted); margin-top: 8px; }
.sum-line.bad { color: var(--error-fg); }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: #111827; color: white; padding: 10px 16px; border-radius: 8px;
  font-size: 14px; box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  display: none; z-index: 100;
}
.toast.show { display: block; }
.toast.error { background: #991b1b; }