:root {
  --bg: #f4f6f3;
  --surface: #ffffff;
  --ink: #1b241f;
  --muted: #66706a;
  --primary: #3f8f52;
  --primary-dark: #2f6f3f;
  --sky: #2f7db5;
  --warn: #c9861a;
  --danger: #c0453b;
  --danger-dark: #9c352d;
  --border: #e3e7e1;
  --sidebar: #232b28;
  --sidebar-ink: #c8d2cb;
  --sidebar-active: #3f8f52;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(20,30,25,.06), 0 4px 16px rgba(20,30,25,.05);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 15px;
}
a { color: var(--sky); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Layout ---- */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 236px; flex-shrink: 0; background: var(--sidebar);
  color: var(--sidebar-ink); display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.sidebar .brand {
  padding: 20px 20px 14px; font-weight: 700; font-size: 16px; color: #fff;
  letter-spacing: .01em; border-bottom: 1px solid rgba(255,255,255,.08);
}
.sidebar .brand small { display: block; font-weight: 400; font-size: 11px; color: #8fa093; margin-top: 3px; }
.nav { list-style: none; margin: 8px 0; padding: 0; flex: 1; }
.nav a {
  display: flex; align-items: center; gap: 10px; padding: 10px 20px;
  color: var(--sidebar-ink); font-size: 14px; border-left: 3px solid transparent;
}
.nav a:hover { background: rgba(255,255,255,.05); text-decoration: none; color: #fff; }
.nav a.active { background: rgba(63,143,82,.18); border-left-color: var(--sidebar-active); color: #fff; font-weight: 600; }
.nav .ico { width: 20px; text-align: center; }
.sidebar .foot { padding: 14px 20px; border-top: 1px solid rgba(255,255,255,.08); font-size: 12px; }
.sidebar .foot a { color: #9fb0a4; }

.main { flex: 1; min-width: 0; }
.topbar {
  background: var(--surface); border-bottom: 1px solid var(--border);
  padding: 14px 28px; display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 5;
}
.topbar h1 { font-size: 18px; margin: 0; }
.content { padding: 28px; max-width: 1000px; }

/* ---- Cards ---- */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px 22px; margin-bottom: 20px;
}
.card h2 { font-size: 16px; margin: 0 0 14px; display: flex; align-items: center; gap: 8px; }
.card h2 .sub { font-size: 12px; color: var(--muted); font-weight: 400; }
.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: 1fr 1fr; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ---- Stat tiles ---- */
.stat { background: #f8faf8; border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.stat .label { font-size: 12px; color: var(--muted); }
.stat .value { font-size: 22px; font-weight: 700; margin-top: 2px; }

/* ---- Status pill ---- */
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 3px 12px; border-radius: 999px; font-size: 13px; font-weight: 600; }
.pill.on  { background: #e4f3e7; color: #276e39; }
.pill.off { background: #fbe6e4; color: #9c352d; }
.pill.dot::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; display: inline-block; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 18px; border-radius: 8px; border: 1px solid transparent;
  font-size: 14px; font-weight: 600; cursor: pointer; background: #eef1ee; color: var(--ink);
  transition: background .12s, transform .04s; text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.sky { background: var(--sky); color: #fff; }
.btn.warn { background: var(--warn); color: #fff; }
.btn.danger { background: var(--danger); color: #fff; }
.btn.danger:hover { background: var(--danger-dark); }
.btn.ghost { background: transparent; border-color: var(--border); }
.btn.sm { padding: 6px 12px; font-size: 13px; }
.btn.big { padding: 14px 22px; font-size: 15px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }

/* ---- Forms ---- */
label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 5px; color: #3a443e; }
input[type=text], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; font-family: inherit; background: #fff; color: var(--ink);
}
input:focus, select:focus, textarea:focus { outline: 2px solid rgba(63,143,82,.35); border-color: var(--primary); }
textarea { resize: vertical; min-height: 120px; font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 13px; }
.field { margin-bottom: 14px; }
.field .hint { font-size: 12px; color: var(--muted); font-weight: 400; margin-top: 4px; }
.checkbox { display: flex; align-items: center; gap: 8px; }
.checkbox input { width: auto; }
.checkbox label { margin: 0; }

/* ---- Tables ---- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 12px; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: none; }
.mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 12px; color: var(--muted); }

/* ---- Flash ---- */
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; border: 1px solid; }
.flash.success { background: #e9f5ec; border-color: #b9e0c3; color: #226e37; }
.flash.error   { background: #fbe8e6; border-color: #f0c4bf; color: #9c352d; }
.flash.warning { background: #fdf3e3; border-color: #f2ddb4; color: #92661a; }

/* ---- Log / code ---- */
pre.log {
  background: #1b241f; color: #cfe0d4; padding: 16px; border-radius: 8px;
  overflow: auto; max-height: 480px; font-size: 12.5px; line-height: 1.5;
  font-family: ui-monospace, Menlo, Consolas, monospace; white-space: pre-wrap; word-break: break-word;
}

/* ---- Login ---- */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--sidebar); }
.auth-card { background: var(--surface); border-radius: 14px; padding: 32px; width: 360px; box-shadow: 0 12px 40px rgba(0,0,0,.3); }
.auth-card h1 { font-size: 20px; margin: 0 0 4px; }
.auth-card p.sub { color: var(--muted); font-size: 13px; margin: 0 0 20px; }

.tabs { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.tabs a { padding: 7px 14px; border-radius: 8px; font-size: 13px; color: var(--ink); background: #eef1ee; }
.tabs a.active { background: var(--primary); color: #fff; }
.tabs a:hover { text-decoration: none; }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.spacer { height: 8px; }
.warnbox { background: #fdf3e3; border: 1px solid #f2ddb4; color: #7a5514; padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 14px; }

@media (max-width: 820px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; }
  .nav { display: flex; flex-wrap: wrap; }
  .nav a { border-left: none; border-bottom: 3px solid transparent; padding: 8px 12px; }
  .nav a.active { border-left: none; border-bottom-color: var(--sidebar-active); }
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr 1fr; }
  .content { padding: 18px; }
}