:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --primary: #4f6ef2;
  --success: #22a06b;
  --danger: #e5484d;
  --text: #222;
  --muted: #6b7280;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo",
    "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  text-align: center;
  padding: 28px 16px 8px;
}
.topbar h1 { margin: 0; font-size: 28px; }
.topbar .sub { color: var(--muted); margin: 6px 0 0; }

.layout {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.card h2 { margin: 4px 0 12px; font-size: 18px; }
.hidden { display: none; }

.row { display: flex; flex-direction: column; margin-bottom: 14px; }
.row label { font-size: 13px; color: var(--muted); margin-bottom: 6px; }

input[type="text"], input[type="number"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  font-size: 15px;
}
input:focus { outline: none; border-color: var(--primary); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; font-size: 14px; }
thead th { color: var(--muted); font-weight: 600; border-bottom: 1px solid var(--border); }

.people-table td { border-bottom: 1px solid #f0f0f0; }
.people-table input { margin: 0; }

.btn-row { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.btn {
  border: none;
  border-radius: 9px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .15s;
}
.btn:hover { opacity: .88; }
.btn.primary { background: var(--primary); color: #fff; }
.btn.success { background: var(--success); color: #fff; }
.btn.ghost   { background: #eef1ff; color: var(--primary); }
.btn.mini    { padding: 6px 10px; font-size: 12px; }
.btn.del     { background: #fdecec; color: var(--danger); }

.hint { color: var(--muted); font-size: 12px; margin: 12px 0 0; }

.summary {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.summary .box {
  flex: 1;
  min-width: 130px;
  background: #f8faff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  text-align: center;
}
.summary .box .k { font-size: 12px; color: var(--muted); }
.summary .box .v { font-size: 20px; font-weight: 700; margin-top: 4px; }

.result-table td { border-bottom: 1px solid #f0f0f0; }
.pos { color: var(--success); font-weight: 700; }
.neg { color: var(--danger); font-weight: 700; }
.zero { color: var(--muted); }

.transfers { list-style: none; padding: 0; margin: 8px 0 0; }
.transfers li {
  background: #f8faff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 8px;
  font-size: 15px;
}
.transfers .from { color: var(--danger); font-weight: 700; }
.transfers .to   { color: var(--success); font-weight: 700; }
.transfers .amt  { font-weight: 700; }
.transfers .done { color: var(--muted); }

.list-table td { border-bottom: 1px solid #f0f0f0; }
.list-table .title-link { color: var(--primary); cursor: pointer; text-decoration: underline; }
.right { text-align: right; }