* { box-sizing: border-box; margin: 0; }
:root {
  --bg: #f6f7f5; --card: #fff; --border: #e2e4e0; --text: #1e211e;
  --muted: #6b7069; --accent: #14655a; --accent-bg: #e7f2ef;
  --green: #0d7a48; --green-bg: #e7f5ec; --red: #b3372e; --red-bg: #f9ebe9;
  --amber-bg: #fdf3e0; --amber: #8a5a10;
}
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.5; }
a { color: var(--accent); }
header { background: #fff; border-bottom: 1px solid var(--border); padding: 0 24px;
  display: flex; align-items: center; gap: 24px; height: 56px; position: sticky; top: 0; z-index: 20; }
header .logo { font-weight: 700; font-size: 17px; color: var(--accent); }
header nav { display: flex; gap: 4px; }
header nav a { text-decoration: none; color: var(--muted); padding: 6px 12px; border-radius: 8px; font-weight: 500; }
header nav a.on { background: var(--accent-bg); color: var(--accent); }
header .spacer { flex: 1; }
main { max-width: 1180px; margin: 24px auto; padding: 0 20px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px 20px; margin-bottom: 18px; }
h1 { font-size: 20px; margin-bottom: 12px; }
h2 { font-size: 16px; margin-bottom: 10px; }
h3 { font-size: 14px; }
button { font: inherit; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border);
  background: #fff; cursor: pointer; font-weight: 500; }
button:hover { background: #f2f3f1; }
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
button.primary:hover { background: #0f5148; }
button.small { padding: 3px 9px; font-size: 13px; }
button.danger { color: var(--red); }
input, select { font: inherit; padding: 8px 10px; border: 1px solid var(--border);
  border-radius: 8px; background: #fff; }
input:focus, select:focus { outline: 2px solid var(--accent-bg); border-color: var(--accent); }
input.qty { width: 64px; text-align: center; }
input.price-edit { width: 90px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; color: var(--muted); font-weight: 500; font-size: 12.5px;
  padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
tr:last-child td { border-bottom: none; }
td.num, th.num { text-align: right; }
.best { color: var(--green); font-weight: 600; }
.na { color: #b8bcb5; }
.chip { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12.5px;
  border: 1px solid var(--border); margin: 2px 3px 2px 0; white-space: nowrap; }
.chip.best { background: var(--green-bg); border-color: transparent; color: var(--green); }
.chip.na { text-decoration: line-through; color: #b8bcb5; }
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.green { background: var(--green-bg); color: var(--green); }
.badge.amber { background: var(--amber-bg); color: var(--amber); }
.badge.accent { background: var(--accent-bg); color: var(--accent); }
.muted { color: var(--muted); font-size: 13px; }
.search-wrap { position: relative; }
.search-wrap input { width: 100%; padding: 12px 14px; font-size: 16px; }
.dropdown { position: absolute; top: 100%; left: 0; right: 0; background: #fff;
  border: 1px solid var(--border); border-radius: 10px; margin-top: 4px; max-height: 420px;
  overflow-y: auto; box-shadow: 0 8px 24px rgba(0,0,0,.09); z-index: 10; }
.dd-item { padding: 10px 14px; border-bottom: 1px solid var(--border); cursor: pointer; }
.dd-item:hover, .dd-item.sel { background: #f6f8f6; }
.dd-item:last-child { border-bottom: none; }
.scenarios { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 14px; }
.scenario { border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; }
.scenario.best-s { border: 2px solid var(--accent); }
.scenario .total { font-size: 24px; font-weight: 700; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.tabs { display: flex; gap: 4px; margin-bottom: 16px; flex-wrap: wrap; }
.tabs button.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: #24312c; color: #fff; padding: 10px 20px; border-radius: 10px; font-size: 14px;
  opacity: 0; transition: opacity .25s; pointer-events: none; z-index: 50; }
.toast.show { opacity: 1; }
.login-box { max-width: 360px; margin: 12vh auto; }
.login-box input { width: 100%; margin-bottom: 12px; }
.login-box button { width: 100%; }
@media (max-width: 720px) { .grid2 { grid-template-columns: 1fr; } th, td { padding: 7px 6px; } }