:root {
  --bg: #10151c;
  --card: #1a2230;
  --line: #2c3a50;
  --text: #e8edf4;
  --muted: #8fa0b5;
  --accent: #4da3ff;
  --ok: #35c46f;
  --warn: #f0b429;
  --danger: #e5484d;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.topbar-title { min-width: 0; display: flex; flex-direction: column; line-height: 1.25; }
.topbar-title strong { font-size: 15px; white-space: nowrap; }
.topbar-title .sub { font-size: 11px; }
.topbar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  white-space: nowrap;
}
.topbar-user .user {
  max-width: 30vw;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar .logout { color: var(--accent); text-decoration: none; }

.container { max-width: 560px; margin: 0 auto; padding: 16px; display: grid; gap: 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}
.card h2 { font-size: 16px; margin-bottom: 14px; }

/* 折り畳みカード(details/summary) */
.card-collapsible { padding: 0; }
.card-collapsible > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  font-size: 16px;
  font-weight: 600;
}
.card-collapsible > summary::-webkit-details-marker { display: none; }
.summary-title { flex-shrink: 0; }
.summary-status {
  flex: 1;
  min-width: 0;
  text-align: right;
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chevron { flex-shrink: 0; color: var(--muted); transition: transform .15s; }
.card-collapsible[open] > summary .chevron { transform: rotate(180deg); }
.card-collapsible[open] > summary { border-bottom: 1px solid var(--line); }
.card-body { padding: 16px 18px; }

.status-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.status-item .label { display: block; font-size: 12px; color: var(--muted); }
.status-item .value { font-size: 18px; font-weight: 600; }

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.badge-online  { background: rgba(53,196,111,.15); color: var(--ok); }
.badge-offline { background: rgba(229,72,77,.15); color: var(--danger); }
.badge-unknown { background: rgba(143,160,181,.15); color: var(--muted); }
.badge-on      { background: rgba(77,163,255,.15); color: var(--accent); }

.field { margin-bottom: 16px; }
.field > .label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }

.segmented { display: flex; gap: 8px; }
.segmented button {
  flex: 1;
  min-width: 0;
  padding: 12px 4px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 15px;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
}
.segmented button.selected {
  border-color: var(--accent);
  background: rgba(77,163,255,.12);
  color: var(--accent);
  font-weight: 700;
}

.actions { display: flex; gap: 10px; margin: 6px 0 10px; }

.btn {
  flex: 1;
  padding: 14px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  color: #fff;
}
.btn-primary { background: var(--accent); }
.btn-danger  { background: var(--danger); }
.btn:disabled { opacity: .4; cursor: not-allowed; }

.light-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.light-row:last-of-type { border-bottom: none; }
.light-info .label { display: block; font-size: 12px; color: var(--muted); }
.light-info .value { font-size: 16px; font-weight: 600; }
.light-buttons { display: flex; gap: 8px; }

.btn-small { flex: none; padding: 10px 18px; font-size: 14px; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
}

.alert {
  background: rgba(229,72,77,.12);
  border: 1px solid rgba(229,72,77,.4);
  color: #ff9b9e;
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 13px;
  margin-top: 10px;
}
.feedback {
  margin-top: 8px;
  font-size: 14px;
  transition: opacity .4s;
}
.feedback.fade-out { opacity: 0; }
.feedback.ok { color: var(--ok); }
.feedback.error { color: var(--danger); }

.muted { color: var(--muted); }
.small { font-size: 12px; margin-top: 8px; }
.hidden { display: none; }

/* 狭い画面(小型スマホ) */
@media (max-width: 400px) {
  .container { padding: 12px; gap: 12px; }
  .card-body, .card-collapsible > summary { padding-left: 14px; padding-right: 14px; }
  .status-item .value { font-size: 16px; }
  .segmented button { font-size: 14px; padding: 12px 2px; }
  .light-row { flex-wrap: wrap; }
  .light-buttons { flex: 1; }
  .light-buttons .btn-small { flex: 1; }
}

/* ログイン画面 */
.login-body { display: grid; place-items: center; padding: 20px; }
.login-card { width: 100%; max-width: 380px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 26px; margin-top: 10vh; }
.login-card h1 { font-size: 20px; text-align: center; margin-bottom: 18px; line-height: 1.4; }
.login-card h1 span { font-size: 14px; color: var(--muted); font-weight: 400; }
.login-card label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.login-card input {
  width: 100%;
  margin-top: 5px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}
.login-card .btn { width: 100%; margin-top: 4px; }