:root{
  --bg:#f4f6f8; --ink:#1a2230; --mut:#6b7482; --card:#ffffff;
  --line:#e3e7ec; --accent:#2563eb; --accent-ink:#ffffff;
  --danger:#dc2626; --ok:#16a34a;
}
*{box-sizing:border-box}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:"Noto Sans JP","Hiragino Sans",system-ui,sans-serif;
  font-size:14px; line-height:1.6;
}
a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}

/* layout */
.topbar{
  display:flex; align-items:center; gap:20px;
  background:var(--card); border-bottom:1px solid var(--line);
  padding:12px 24px;
}
.topbar__brand{font-weight:900; letter-spacing:.04em}
.topbar__nav{display:flex; gap:16px; flex:1}
.topbar__user{color:var(--mut); font-size:12px}
.wrap{max-width:960px; margin:0 auto; padding:28px 24px}
h1{font-size:20px; margin:0 0 20px}
h2{font-size:16px; margin:28px 0 12px}

/* card */
.card{
  background:var(--card); border:1px solid var(--line); border-radius:10px;
  padding:20px; margin-bottom:20px;
}
.stats{display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); gap:16px}
.stat{background:var(--card); border:1px solid var(--line); border-radius:10px; padding:18px}
.stat__label{font-size:12px; color:var(--mut)}
.stat__value{font-size:30px; font-weight:900}

/* table */
table{width:100%; border-collapse:collapse}
th,td{text-align:left; padding:10px 12px; border-bottom:1px solid var(--line); vertical-align:middle}
th{font-size:12px; color:var(--mut); font-weight:700}
tr:hover td{background:#f8fafc}

/* form */
label{display:block; font-size:12px; color:var(--mut); margin-bottom:4px}
input,select,textarea{
  width:100%; padding:8px 10px; border:1px solid var(--line); border-radius:8px;
  font:inherit; background:#fff;
}
.form-grid{display:grid; grid-template-columns:1fr 1fr; gap:14px}
.form-grid .full{grid-column:1/-1}

/* buttons */
.btn{
  display:inline-block; padding:8px 16px; border-radius:8px; border:1px solid var(--line);
  background:#fff; color:var(--ink); font:inherit; font-weight:700; cursor:pointer;
}
.btn:hover{background:#f1f5f9}
.btn--primary{background:var(--accent); border-color:var(--accent); color:var(--accent-ink)}
.btn--primary:hover{background:#1d4ed8}
.btn--danger{color:var(--danger); border-color:#f3c6c6}
.btn--sm{padding:4px 10px; font-size:12px}

/* badge */
.badge{display:inline-block; padding:2px 10px; border-radius:99px; font-size:12px; font-weight:700}
.badge--active{background:#dcfce7; color:var(--ok)}
.badge--suspended{background:#fef9c3; color:#a16207}
.badge--ended{background:#f1f5f9; color:var(--mut)}

/* login */
.login{
  min-height:100vh; display:flex; align-items:center; justify-content:center; padding:24px;
}
.login__card{
  background:var(--card); border:1px solid var(--line); border-radius:14px;
  padding:40px 36px; width:100%; max-width:380px; text-align:center;
}
.login__title{font-size:18px; font-weight:900; margin:0 0 6px}
.login__note{font-size:12px; color:var(--mut); margin:16px 0 0}
.btn--google{width:100%; padding:11px; display:flex; align-items:center; justify-content:center; gap:10px; margin-top:24px}

/* modal */
.modal-back{
  position:fixed; inset:0; background:rgba(20,25,35,.45);
  display:none; align-items:center; justify-content:center; padding:24px; z-index:10;
}
.modal-back.open{display:flex}
.modal{background:#fff; border-radius:12px; padding:24px; width:100%; max-width:560px}
.modal h2{margin-top:0}
.modal__actions{display:flex; justify-content:flex-end; gap:10px; margin-top:20px}

.muted{color:var(--mut); font-size:12px}
.row-actions{display:flex; gap:8px; justify-content:flex-end}
.mock-note{
  background:#fff7ed; border:1px solid #fed7aa; color:#9a3412;
  border-radius:8px; padding:8px 14px; font-size:12px; margin-bottom:20px;
}