:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --ink: #1f2430;
  --ink-2: #5b6272;
  --ink-3: #8a90a0;
  --line: #e2e5eb;
  --line-2: #eef0f4;
  --side: #1d2433;
  --side-ink: #c9cfdc;
  --side-active: #2c3650;
  --accent: #0f7b6c;
  --accent-ink: #ffffff;
  --accent-soft: #e3f3f0;
  --warn: #b26b00;
  --warn-soft: #fff4e0;
  --danger: #c0392b;
  --danger-soft: #fdecea;
  --ok: #2e7d32;
  --ok-soft: #e8f5e9;
  --info: #2f5fb3;
  --info-soft: #e8effb;
  --radius: 8px;
  --font: "Meiryo UI", "Meiryo", "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
}
html[lang="zh-CN"] { --font: "Microsoft YaHei", "微软雅黑", "PingFang SC", "Noto Sans SC", "Meiryo UI", sans-serif; }
html[lang="en"] { --font: "Meiryo UI", "Segoe UI", "Helvetica Neue", Arial, sans-serif; }

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { font-family: var(--font); font-size: 14px; color: var(--ink); background: var(--bg); line-height: 1.55; }
button, input, select, textarea { font-family: var(--font); font-size: 14px; color: var(--ink); }
a { color: var(--accent); }
.boot { display: grid; place-items: center; height: 100vh; color: var(--ink-3); font-size: 18px; }

/* ── ログイン ── */
.auth { min-height: 100vh; display: grid; place-items: center; padding: 24px 16px; }
.auth-card { width: 100%; max-width: 400px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 32px 28px; }
.auth-card h1 { margin: 0 0 4px; font-size: 22px; }
.auth-card .sub { color: var(--ink-2); margin: 0 0 24px; }
.auth-card .switch { margin-top: 16px; text-align: center; color: var(--ink-2); }
.auth-lang { position: fixed; top: 16px; right: 16px; }

/* ── 全体の枠 ── */
.shell { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.side { background: var(--side); color: var(--side-ink); display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; }
.brand { padding: 20px 20px 16px; font-weight: 700; font-size: 17px; color: #fff; letter-spacing: .02em; }
.brand small { display: block; font-weight: 400; font-size: 12px; color: var(--side-ink); opacity: .7; margin-top: 2px; }
.nav { flex: 1; overflow-y: auto; padding: 4px 10px; }
.nav button { display: flex; align-items: center; gap: 10px; width: 100%; padding: 10px 12px; margin: 2px 0; background: none; border: 0; border-radius: 6px; color: var(--side-ink); text-align: left; cursor: pointer; }
.nav button:hover { background: var(--side-active); color: #fff; }
.nav button.on { background: var(--side-active); color: #fff; font-weight: 700; box-shadow: inset 3px 0 0 var(--accent); }
.nav button:disabled { opacity: .45; cursor: default; background: none; }
.nav button > span:first-of-type { flex: 1; }
.nav .soon { white-space: nowrap; font-size: 10.5px; margin-left: auto; font-size: 11px; padding: 1px 6px; border: 1px solid currentColor; border-radius: 10px; }
.nav svg { width: 18px; height: 18px; flex: none; }
.side-foot { padding: 12px 20px 16px; font-size: 12px; opacity: .6; }

.main { min-width: 0; display: flex; flex-direction: column; }
.top { display: flex; align-items: center; gap: 12px; padding: 12px 24px; background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.top .co { font-weight: 700; }
.top .grow { flex: 1; }
.top .who { color: var(--ink-2); }
.top .menu-btn { display: none; }
.top select { width: auto; }
.menu-btn svg { width: 18px; height: 18px; }
.top .co { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 40vw; }
a.btn { text-decoration: none; color: var(--ink); }
.content { padding: 24px; max-width: 1280px; width: 100%; }
.page-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.page-head h2 { margin: 0; font-size: 20px; flex: 1; min-width: 160px; }

/* ── 部品 ── */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 6px; border: 1px solid var(--line); background: var(--panel); cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--ink-3); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 700; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--danger); border-color: #efc2bd; }
.btn.small { padding: 4px 10px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: default; }
.btn.block { width: 100%; justify-content: center; padding: 10px; }

.field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 14px; }
.field label { font-size: 13px; color: var(--ink-2); font-weight: 700; }
.field .hint { font-size: 12px; color: var(--ink-3); }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=search], select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
textarea { min-height: 96px; resize: vertical; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 16px; }
.inline { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 12px; }
.filters input[type=search] { width: 240px; }
.filters select { width: auto; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 14px; flex-wrap: wrap; }
.tabs button { background: none; border: 0; padding: 8px 14px; cursor: pointer; color: var(--ink-2); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs button.on { color: var(--ink); font-weight: 700; border-bottom-color: var(--accent); }
.tabs .count { font-size: 12px; color: var(--ink-3); margin-left: 4px; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.card-pad { padding: 16px 18px; }
.card h3 { margin: 0 0 12px; font-size: 15px; }

.table-wrap { overflow-x: auto; }
table.list { width: 100%; border-collapse: collapse; background: var(--panel); }
table.list th, table.list td { padding: 9px 12px; border-bottom: 1px solid var(--line-2); text-align: left; vertical-align: middle; }
table.list th { font-size: 12px; color: var(--ink-2); font-weight: 700; background: #fafbfc; white-space: nowrap; }
table.list tbody tr.click { cursor: pointer; }
table.list tbody tr.click:hover { background: #f7faf9; }
table.list td.num, table.list th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
table.list tr.low td { background: var(--warn-soft); }
.empty { padding: 40px 16px; text-align: center; color: var(--ink-3); }
.mono { white-space: nowrap; font-family: Consolas, "Courier New", monospace; font-size: 13px; }
.muted { color: var(--ink-3); }

.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; font-weight: 700; white-space: nowrap; background: var(--line-2); color: var(--ink-2); }
.badge.received { background: var(--info-soft); color: var(--info); }
.badge.paid { background: #efe8fb; color: #6a3fb3; }
.badge.preparing { background: var(--warn-soft); color: var(--warn); }
.badge.shipped { background: var(--accent-soft); color: var(--accent); }
.badge.completed { background: var(--ok-soft); color: var(--ok); }
.badge.cancelled { background: var(--line-2); color: var(--ink-3); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.trial { background: var(--warn-soft); color: var(--warn); }
.badge.suspended { background: var(--danger-soft); color: var(--danger); }
.lang-chip { display: inline-block; font-size: 11px; padding: 0 5px; border: 1px solid var(--line); border-radius: 4px; color: var(--ink-2); margin-right: 3px; }

/* ── ダッシュボード ── */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
.stat { padding: 16px 18px; }
.stat .label { color: var(--ink-2); font-size: 13px; }
.stat .value { font-size: 26px; font-weight: 700; margin-top: 4px; font-variant-numeric: tabular-nums; }
.stat .value.warn { color: var(--warn); }
.stat .sub { font-size: 12px; color: var(--ink-3); }
.dash-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; margin-bottom: 16px; }
.chart svg { width: 100%; height: auto; display: block; }
.bars-h .row { display: grid; grid-template-columns: 90px 1fr auto; gap: 8px; align-items: center; margin: 8px 0; font-size: 13px; }
.bars-h .bar { height: 10px; background: var(--accent); border-radius: 5px; min-width: 2px; }

/* ── モーダル ── */
.overlay { position: fixed; inset: 0; background: rgba(20, 24, 34, .45); display: flex; align-items: flex-start; justify-content: center; padding: 40px 16px; overflow-y: auto; z-index: 50; }
.modal { background: var(--panel); border-radius: 12px; width: 100%; max-width: 640px; box-shadow: 0 10px 40px rgba(0,0,0,.2); }
.modal.wide { max-width: 900px; }
.modal-head { display: flex; align-items: center; gap: 10px; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.modal-head h3 { margin: 0; font-size: 17px; flex: 1; }
.modal-body { padding: 18px 20px; }
.modal-foot { display: flex; gap: 8px; justify-content: flex-end; padding: 14px 20px; border-top: 1px solid var(--line); flex-wrap: wrap; }
.modal-foot .left { margin-right: auto; display: flex; gap: 8px; flex-wrap: wrap; }
.x { background: none; border: 0; font-size: 22px; line-height: 1; cursor: pointer; color: var(--ink-3); padding: 4px 8px; }
.kv { display: grid; grid-template-columns: 130px 1fr; gap: 6px 12px; margin-bottom: 14px; }
.kv dt { color: var(--ink-2); font-size: 13px; }
.kv dd { margin: 0; }
.items-edit td { padding: 6px 6px; }
.items-edit input, .items-edit select { padding: 6px 8px; }
.total-line { display: flex; justify-content: flex-end; gap: 24px; padding: 10px 6px; font-size: 15px; }
.total-line strong { font-size: 18px; }
.note-box { background: var(--line-2); border-radius: 6px; padding: 10px 12px; color: var(--ink-2); font-size: 13px; margin-bottom: 14px; }
.notice { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 13px; }
.notice.warn { background: var(--warn-soft); color: var(--warn); }
.notice.danger { background: var(--danger-soft); color: var(--danger); }

/* ── トースト ── */
#toast-root { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 100; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast { background: var(--ink); color: #fff; padding: 10px 18px; border-radius: 8px; box-shadow: 0 4px 16px rgba(0,0,0,.2); max-width: 90vw; }
.toast.error { background: var(--danger); }

/* ── スマホ ── */
@media (max-width: 900px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .dash-grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: fixed; left: 0; top: 0; width: 240px; z-index: 40; transform: translateX(-100%); transition: transform .2s; }
  .side.open { transform: none; }
  .top .menu-btn { display: inline-flex; }
  .top { padding: 10px 16px; }
  .top .who, .top .co { display: none; }
  .content { padding: 16px; }
  .grid2, .grid3 { grid-template-columns: 1fr; }
  .filters input[type=search] { width: 100%; }
  .kv { grid-template-columns: 1fr; }
}

@media print {
  .side, .top, .filters, .page-head .btn { display: none !important; }
  .shell { display: block; }
  body { background: #fff; }
}