:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --border: #e2e6ec;
  --text: #1f2933;
  --muted: #7b8794;
  --primary: #2563eb;
  --primary-d: #1d4ed8;
  --accent: #059669;
  --accent-d: #047857;
  --sat: #fff7ed;
  --sun: #fef2f2;
  --sat-text: #2563eb;
  --sun-text: #dc2626;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
.hidden { display: none !important; }

/* ---------- ボタン ---------- */
.btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: background .15s, border-color .15s, opacity .15s;
}
.btn:hover { background: #f0f2f5; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-d); }
.btn.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.accent:hover { background: var(--accent-d); }
.btn.ghost { background: transparent; }
.btn.small { padding: 5px 10px; font-size: 13px; }

/* ---------- 認証 ---------- */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.auth-card {
  background: var(--surface);
  width: 100%;
  max-width: 380px;
  padding: 32px;
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.auth-card h1 { font-size: 20px; margin: 0 0 20px; text-align: center; }
.tabs { display: flex; gap: 4px; background: var(--bg); padding: 4px; border-radius: 10px; margin-bottom: 20px; }
.tab { flex: 1; border: none; background: transparent; padding: 8px; border-radius: 7px; cursor: pointer; color: var(--muted); }
.tab.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-form label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--muted); }
.auth-form input {
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
}
.auth-form input:focus { outline: none; border-color: var(--primary); }
.error { color: var(--sun-text); font-size: 13px; min-height: 18px; margin: 12px 0 0; text-align: center; }

/* ---------- トップバー ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface);
  padding: 12px 22px;
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 16px; }
.user-box { display: flex; align-items: center; gap: 10px; }
#user-info { color: var(--muted); }

.container { max-width: 1020px; margin: 0 auto; padding: 22px; }

/* ---------- 月バー ---------- */
.month-bar { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.month-bar h2 { font-size: 18px; margin: 0; min-width: 150px; text-align: center; }
.spacer { flex: 1; }

/* ---------- サマリ ---------- */
.summary { display: flex; align-items: center; gap: 24px; margin-bottom: 14px; padding: 14px 18px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; }
.summary-item { display: flex; align-items: baseline; gap: 6px; color: var(--muted); }
.summary-item strong { font-size: 22px; color: var(--text); }
.save-status { margin-left: auto; color: var(--accent); font-size: 13px; }

/* ---------- テーブル ---------- */
.table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
table.kintai { width: 100%; border-collapse: collapse; }
table.kintai th, table.kintai td { padding: 6px 8px; border-bottom: 1px solid var(--border); text-align: center; }
table.kintai thead th { background: #f8fafc; color: var(--muted); font-weight: 600; font-size: 13px; position: sticky; top: 0; }
.col-date { width: 70px; }
.col-dow { width: 48px; }
.col-content { width: 36%; }
table.kintai td input[type="time"] { width: 100px; padding: 5px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; }
table.kintai td input.content { width: 100%; padding: 5px 8px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; text-align: left; }
table.kintai td input:focus { outline: none; border-color: var(--primary); }
tr.sat { background: var(--sat); }
tr.sat .dow { color: var(--sat-text); }
tr.sun { background: var(--sun); }
tr.sun .dow { color: var(--sun-text); }
.worktime { font-variant-numeric: tabular-nums; color: var(--text); }
.date-cell { font-variant-numeric: tabular-nums; }

/* ---------- モーダル ---------- */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.35); display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal-card { background: var(--surface); padding: 26px; border-radius: 14px; width: 100%; max-width: 360px; box-shadow: var(--shadow); }
.modal-card h3 { margin: 0 0 18px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

/* ---------- 管理者 ---------- */
.badge { display: inline-block; font-size: 11px; font-weight: 600; color: #fff; background: var(--accent); padding: 2px 8px; border-radius: 999px; vertical-align: middle; margin-left: 6px; }
#admin-info { color: var(--muted); }
table.admin-table th, table.admin-table td { text-align: center; padding: 10px 8px; }
table.admin-table td.name-cell { text-align: left; font-weight: 600; }
table.admin-table td.company-cell { text-align: left; color: var(--muted); }
.col-ops { width: 280px; }
.row-ops { display: flex; gap: 6px; justify-content: center; }
.admin-empty { text-align: center; color: var(--muted); padding: 30px; }
.btn.danger { background: #fff; border-color: #fca5a5; color: var(--sun-text); }
.btn.danger:hover { background: var(--sun); }

.modal-wide { max-width: 880px; }
.detail-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.detail-head h3 { margin: 0; }
.detail-scroll { max-height: 60vh; overflow-y: auto; }
table.kintai td.ro { font-variant-numeric: tabular-nums; }
td.ro-content { text-align: left; }

@media (max-width: 640px) {
  .col-content { width: auto; }
  table.kintai td input[type="time"] { width: 78px; }
}