:root {
  --bg1: #0B1026;
  --bg2: #1B2A5A;
  --yellow: #FFC93C;
  --green: #2ECC71;
  --coral: #FF6B6B;
  --text: #F3F5FF;
  --muted: rgba(226, 232, 255, .62);
  --card: rgba(255, 255, 255, .07);
  --card-border: rgba(255, 255, 255, .12);
  --radius: 20px;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { background: var(--bg1); }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", Roboto, sans-serif;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(255, 201, 60, .10), transparent 60%),
    radial-gradient(700px 500px at -10% 30%, rgba(90, 120, 255, .16), transparent 60%),
    linear-gradient(170deg, var(--bg1) 0%, var(--bg2) 100%) fixed;
  padding-bottom: env(safe-area-inset-bottom);
}
a { color: var(--yellow); text-decoration: none; }
h1 { font-size: 26px; margin: 0 0 4px; letter-spacing: .5px; }
h2 { font-size: 18px; margin: 0 0 14px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.hl { color: var(--yellow); }
.ok-text { color: var(--green); }

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: calc(12px + env(safe-area-inset-top)) 18px 12px;
  background: rgba(11, 16, 38, .72);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-size: 17px; font-weight: 600; }
.brand b { color: var(--yellow); }
.brand-logo {
  width: 32px; height: 32px; border-radius: 10px;
  display: grid; place-items: center;
  background: var(--yellow); color: var(--bg1); font-weight: 800; font-size: 17px;
  box-shadow: 0 0 18px rgba(255, 201, 60, .45);
}
.topnav { display: flex; gap: 6px; }
.topnav a { color: var(--muted); padding: 8px 12px; border-radius: 12px; font-size: 14px; }
.topnav a:active { background: rgba(255, 255, 255, .08); }

.wrap { max-width: 560px; margin: 0 auto; padding: 18px 16px 24px; }
.hero { padding: 10px 4px 16px; }
.foot { text-align: center; color: rgba(226, 232, 255, .3); font-size: 12px; padding: 8px 0 calc(20px + env(safe-area-inset-bottom)); }

.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 14px;
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .25), inset 0 1px 0 rgba(255, 255, 255, .06);
  color: var(--text);
}
a.card:active { transform: scale(.985); }
.back { display: inline-block; padding: 6px 2px 12px; color: var(--muted); }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 10px; }

.flash { border-radius: 14px; padding: 12px 14px; margin-bottom: 14px; font-size: 15px; }
.flash-ok { background: rgba(46, 204, 113, .14); border: 1px solid rgba(46, 204, 113, .4); color: #b9f5d2; }
.flash-error { background: rgba(255, 107, 107, .14); border: 1px solid rgba(255, 107, 107, .45); color: #ffd0d0; }

/* forms */
.form label { display: block; margin-bottom: 14px; color: var(--muted); font-size: 14px; }
.form input:not([type=radio]):not([type=checkbox]), .form textarea {
  display: block; width: 100%; margin-top: 6px;
  min-height: 50px; padding: 12px 14px;
  font: inherit; font-size: 17px; color: var(--text);
  background: rgba(0, 0, 0, .25);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 14px; outline: none;
}
.form input:focus, .form textarea:focus { border-color: var(--yellow); box-shadow: 0 0 0 3px rgba(255, 201, 60, .18); }
.form input[type=file] { font-size: 14px; }
.code-input { text-align: center; font-size: 34px !important; letter-spacing: 12px; font-weight: 700; font-variant-numeric: tabular-nums; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.check { display: flex !important; align-items: center; gap: 10px; color: var(--text) !important; }
.check input { width: 22px; height: 22px; accent-color: var(--yellow); }
.inline-form { display: flex; gap: 10px; margin-bottom: 12px; }
.inline-form input { margin-top: 0 !important; flex: 1; }
.field-label { color: var(--muted); font-size: 14px; margin: 4px 0 8px; }

.seg { display: grid; gap: 8px; margin-bottom: 16px; }
.seg-2 { grid-template-columns: repeat(2, 1fr); }
.seg-3 { grid-template-columns: repeat(3, 1fr); }
.seg-5 { grid-template-columns: repeat(5, 1fr); }
.seg-6 { grid-template-columns: repeat(6, 1fr); }
.seg label { margin: 0 !important; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span {
  display: grid; place-items: center; min-height: 48px; border-radius: 14px;
  background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .12);
  color: var(--text); font-size: 16px; font-weight: 600; cursor: pointer; transition: all .15s;
}
.seg input:checked + span { background: var(--yellow); border-color: var(--yellow); color: var(--bg1); box-shadow: 0 4px 16px rgba(255, 201, 60, .35); }
.seg input:focus-visible + span { outline: 2px solid var(--yellow); outline-offset: 2px; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 20px; border-radius: 16px; border: 1px solid transparent;
  font: inherit; font-size: 16px; font-weight: 700; cursor: pointer;
  transition: transform .1s, filter .15s;
}
.btn:active { transform: scale(.97); filter: brightness(.95); }
.btn-block { display: flex; width: 100%; margin-bottom: 10px; }
.btn-primary { background: linear-gradient(180deg, #FFD567, var(--yellow)); color: #1a1400; box-shadow: 0 6px 18px rgba(255, 201, 60, .3); }
.btn-green { background: var(--green); color: #052611; box-shadow: 0 6px 18px rgba(46, 204, 113, .3); }
.btn-coral { background: var(--coral); color: #2a0606; box-shadow: 0 6px 18px rgba(255, 107, 107, .3); }
.btn-ghost { background: rgba(255, 255, 255, .07); color: var(--text); border-color: rgba(255, 255, 255, .16); }
.btn-danger-ghost { background: transparent; color: var(--coral); border-color: rgba(255, 107, 107, .45); }
.btn-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.btn-grid .btn-block { margin: 0; }

/* device cards */
.device-name { font-size: 19px; font-weight: 700; }
.device-name.big { font-size: 22px; }
.pill { font-size: 12px; font-weight: 700; padding: 5px 10px; border-radius: 999px; white-space: nowrap; }
.pill-online { background: rgba(46, 204, 113, .16); color: var(--green); }
.pill-online::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--green); margin-right: 6px; vertical-align: 1px; box-shadow: 0 0 8px var(--green); }
.pill-offline, .pill-off { background: rgba(255, 255, 255, .08); color: var(--muted); }
.status-line { margin: 14px 0; padding: 10px 14px; border-radius: 14px; font-weight: 600; font-size: 15px; }
.status-guard { background: rgba(255, 201, 60, .1); color: var(--yellow); }
.status-allow { background: rgba(46, 204, 113, .12); color: var(--green); }
.status-paused { background: rgba(255, 107, 107, .12); color: var(--coral); }
.stats3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; text-align: center; }
.stats3 div { background: rgba(0, 0, 0, .18); border-radius: 14px; padding: 10px 4px; }
.stats3 b { display: block; font-size: 24px; color: var(--text); font-variant-numeric: tabular-nums; }
.stats3 span { font-size: 12px; color: var(--muted); }

/* empty state */
.empty { text-align: center; padding: 28px 20px; }
.empty-icon { margin: 4px auto 12px; filter: drop-shadow(0 0 14px rgba(255, 201, 60, .35)); }
.steps { text-align: left; margin: 0 auto 20px; padding-left: 22px; color: var(--muted); max-width: 360px; }
.steps li { margin-bottom: 8px; }
.steps b { color: var(--yellow); }

/* chart */
.chart { width: 100%; height: auto; display: block; }
.chart-val { fill: var(--text); font-size: 11px; font-weight: 700; }
.chart-lbl { fill: var(--muted); font-size: 10px; }

.ring-row { display: flex; align-items: center; gap: 18px; margin-bottom: 14px; }
.ring {
  --p: 0; width: 88px; height: 88px; border-radius: 50%; flex: none;
  background: conic-gradient(var(--green) calc(var(--p) * 1%), rgba(255, 255, 255, .1) 0);
  display: grid; place-items: center;
}
.ring span { width: 70px; height: 70px; border-radius: 50%; background: #131c40; display: grid; place-items: center; font-weight: 800; font-size: 19px; }
.subj { margin-bottom: 10px; }
.bar { height: 8px; border-radius: 99px; background: rgba(255, 255, 255, .08); overflow: hidden; margin-top: 4px; }
.bar i { display: block; height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--yellow), var(--green)); }

/* answers */
.answers, .releases { list-style: none; margin: 0; padding: 0; }
.answers li { padding: 12px 12px 12px 14px; border-radius: 14px; background: rgba(0, 0, 0, .16); margin-bottom: 8px; border-left: 4px solid var(--green); }
.answers li.is-wrong { border-left-color: var(--coral); }
.ans-head { display: flex; align-items: center; gap: 8px; }
.ans-head .muted { flex: 1; }
.tag { font-size: 12px; padding: 2px 8px; border-radius: 8px; background: rgba(255, 201, 60, .14); color: var(--yellow); }
.mark { font-weight: 800; color: var(--green); }
.is-wrong .mark { color: var(--coral); }
.ans-q { margin: 6px 0 2px; font-size: 16px; word-break: break-all; }
.ans-meta { color: var(--muted); }
.ans-meta b { color: var(--text); }
.releases li { padding: 12px 0; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.releases li:last-child { border-bottom: 0; }
.sha { display: block; font-size: 11px; color: var(--muted); word-break: break-all; margin-top: 4px; }

@media (min-width: 600px) { .wrap { padding-top: 28px; } }

/* device diagnostics */
.diag summary { list-style: none; cursor: pointer; }
.diag summary::-webkit-details-marker { display: none; }
.diag summary h2::after { content: " ▾"; color: var(--muted); font-size: 14px; }
.diag-list { list-style: none; margin: 12px 0; padding: 0; }
.diag-list li { display: flex; justify-content: space-between; padding: 9px 0; border-bottom: 1px solid rgba(255, 255, 255, .06); font-size: 14px; }
.diag-list b.ok { color: var(--green); }
.diag-list b.bad { color: var(--coral, #FF6B6B); }
.diag-list b.na { color: var(--muted); }
.diag-log { background: rgba(0, 0, 0, .3); border-radius: 12px; padding: 10px; font-size: 11px; line-height: 1.5; overflow-x: auto; white-space: pre; color: var(--muted); max-height: 260px; }

/* connection state */
.pill-lost { background: rgba(255, 107, 107, .18); color: var(--coral); }
.pill-lost::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--coral); margin-right: 6px; vertical-align: 1px; box-shadow: 0 0 8px var(--coral); animation: blink 1.2s infinite; }
@keyframes blink { 50% { opacity: .25; } }
.alert-lost { margin-top: 12px; padding: 10px 12px; border-radius: 12px; background: rgba(255, 107, 107, .14); border: 1px solid rgba(255, 107, 107, .35); color: #FFB3B3; font-size: 13px; line-height: 1.5; }
.conn-note { margin-top: 8px; }