:root{
    --bg:#f4f6f9;
    --card:#ffffff;
    --ink:#1f2933;
    --muted:#6b7684;
    --line:#e2e8f0;
    --primary:#2563eb;
    --primary-dark:#1d4ed8;
    --danger:#dc2626;
    --ok:#16a34a;
    --warn:#d97706;
    --radius:12px;
    --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:"Hiragino Kaku Gothic ProN","Yu Gothic UI","Meiryo",system-ui,sans-serif;
    background:var(--bg);color:var(--ink);line-height:1.6;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* ---- topbar ---- */
.topbar{background:#111827;color:#fff}
.topbar-inner{max-width:1100px;margin:0 auto;display:flex;align-items:center;gap:20px;padding:0 20px;height:56px}
.brand{color:#fff;font-weight:700;font-size:18px}
.brand:hover{text-decoration:none}
.mainnav{display:flex;gap:4px;flex:1;flex-wrap:wrap}
.mainnav a{color:#cbd5e1;padding:6px 10px;border-radius:8px;font-size:14px}
.mainnav a:hover{background:#1f2937;color:#fff;text-decoration:none}
.mainnav a.active{color:#fcd34d;background:#1f2937}
.mainnav a.active:hover{color:#fcd34d}
.topbar-right{display:flex;align-items:center;gap:12px}
.whoami{font-size:13px;color:#cbd5e1}

/* ---- layout ---- */
.container{max-width:1100px;margin:24px auto;padding:0 20px}
.site-footer{max-width:1100px;margin:40px auto;padding:0 20px;color:var(--muted)}
h1{font-size:22px;margin:0 0 20px}
h2{font-size:17px;margin:0 0 14px}
.page-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px;flex-wrap:wrap}
.page-head h1{margin:0}

/* ---- cards ---- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:20px}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

/* ---- stat ---- */
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.stat .label{color:var(--muted);font-size:13px}
.stat .value{font-size:26px;font-weight:700;margin-top:4px}
.stat .sub{color:var(--muted);font-size:12px;margin-top:4px}
.stat.accent{background:linear-gradient(135deg,#2563eb,#1d4ed8);color:#fff;border:none}
.stat.accent .label,.stat.accent .sub{color:#dbeafe}

/* ---- forms ---- */
.form-row{margin-bottom:14px}
label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:#374151}
input[type=text],input[type=password],input[type=number],input[type=date],input[type=time],input[type=url],select,textarea{
    width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit;background:#fff;
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
textarea{min-height:80px;resize:vertical}
.form-inline{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;align-items:end}
.hint{color:var(--muted);font-size:12px;margin-top:4px}

/* ---- buttons ---- */
.btn{display:inline-block;padding:9px 16px;border-radius:8px;border:1px solid transparent;font-size:14px;font-weight:600;cursor:pointer;background:var(--primary);color:#fff}
.btn:hover{background:var(--primary-dark);text-decoration:none}
.btn-ghost{background:transparent;border-color:#4b5563;color:#e5e7eb}
.btn-ghost:hover{background:#1f2937}
.btn-sm{padding:5px 10px;font-size:12px}
.btn-danger{background:var(--danger)}
.btn-danger:hover{background:#b91c1c}
.btn-secondary{background:#e5e7eb;color:#374151}
.btn-secondary:hover{background:#d1d5db}

/* ---- tables ---- */
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:9px 10px;text-align:left;border-bottom:1px solid var(--line)}
th{background:#f8fafc;color:#475569;font-size:12px;font-weight:600;white-space:nowrap}
tbody tr:hover{background:#f8fafc}
.table-wrap{overflow-x:auto}

/* ---- badges ---- */
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600}
.badge-progress{background:#fef3c7;color:#92400e}
.badge-done{background:#dcfce7;color:#166534}
.badge-admin{background:#ede9fe;color:#5b21b6}
.badge-user{background:#e0f2fe;color:#075985}

/* ---- flash ---- */
.flash{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px}
.flash-success{background:#dcfce7;color:#166534;border:1px solid #bbf7d0}
.flash-error{background:#fee2e2;color:#991b1b;border:1px solid #fecaca}
.flash-info{background:#dbeafe;color:#1e40af;border:1px solid #bfdbfe}

/* ---- login ---- */
.login-wrap{max-width:380px;margin:8vh auto;padding:0 20px}
.login-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}
.login-card h1{text-align:center;font-size:20px}

.muted{color:var(--muted)}
.right{text-align:right}
.nowrap{white-space:nowrap}
.section-title{display:flex;align-items:center;gap:8px;margin:0 0 14px}
.chart-box{position:relative;height:300px}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.empty{color:var(--muted);text-align:center;padding:30px}