:root {
  --bg: #eef1f6;
  --bg-soft: #e4e8f0;
  --panel: #ffffff;
  --panel-2: #f8f9fc;
  --text: #171a21;
  --muted: #6b7280;
  --border: #e2e5ec;
  --accent: #4f46e5;
  --accent-2: #6366f1;
  --accent-soft: #eef0fe;
  --danger: #dc2626;
  --danger-soft: #fdecec;
  --ok: #16a34a;
  --ok-soft: #e8f8ee;
  --warn: #b45309;
  --warn-soft: #fef3c7;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(20, 24, 38, 0.05);
  --shadow: 0 4px 16px rgba(20, 24, 38, 0.06);
  --shadow-lg: 0 12px 32px rgba(20, 24, 38, 0.14);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --bg-soft: #14171d;
    --panel: #1a1d24;
    --panel-2: #20242c;
    --text: #eceef2;
    --muted: #949aa6;
    --border: #2b303a;
    --accent: #818cf8;
    --accent-2: #a5b4fc;
    --accent-soft: #232544;
    --danger: #f87171;
    --danger-soft: #3a1c1c;
    --ok: #4ade80;
    --ok-soft: #17301f;
    --warn: #fbbf24;
    --warn-soft: #3a2f10;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-tap-highlight-color: transparent; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  background:
    radial-gradient(1200px 500px at 100% -10%, var(--accent-soft) 0%, transparent 60%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  padding: 20px;
  padding-bottom: max(20px, env(safe-area-inset-bottom));
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1180px; margin: 0 auto; }

/* ---------- Header ---------- */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding: 4px 2px;
}
.header-left { display: flex; align-items: center; gap: 6px; }
.menu-btn {
  width: 40px; height: 40px; padding: 0; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px; background: var(--panel); border: 1px solid var(--border);
}
.menu-btn svg { width: 20px; height: 20px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-icon {
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex; align-items: center; justify-content: center;
  color: #fff; flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}
.brand-icon svg { width: 22px; height: 22px; }
.brand-titles h1 { font-size: 1.25rem; font-weight: 700; margin: 0; letter-spacing: -0.01em; }
.brand-titles .tagline { font-size: 0.78rem; color: var(--muted); margin-top: 1px; }

.header-actions { display: flex; align-items: center; gap: 10px; }

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 999px; font-size: 0.78rem; font-weight: 600;
  border: 1px solid transparent;
}
.badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; flex-shrink: 0; }
.badge.demo { background: var(--warn-soft); color: var(--warn); }
.badge.live { background: var(--ok-soft); color: var(--ok); }

/* ---------- Alert banners ---------- */
.alert-banner {
  display: flex; align-items: center; gap: 10px;
  background: var(--danger-soft); color: var(--danger);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 0.88rem; font-weight: 600;
  margin-bottom: 14px;
}
.alert-banner svg { width: 20px; height: 20px; flex-shrink: 0; }
.alert-banner.info { background: var(--accent-soft); color: var(--accent); }
.alert-banner .ack-btn {
  margin-left: auto; flex-shrink: 0;
  background: var(--panel); color: inherit;
  border: 1px solid currentColor;
  border-radius: var(--radius-sm);
  padding: 5px 10px; font-size: 0.78rem; font-weight: 700;
  cursor: pointer;
}

.icon-btn {
  display: inline-flex; align-items: center; gap: 6px;
}

/* ---------- Summary ---------- */
.summary-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
  margin-bottom: 22px;
}
.summary-stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.summary-stat:hover { box-shadow: var(--shadow); transform: translateY(-1px); }
.stat-icon {
  width: 38px; height: 38px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.stat-icon svg { width: 19px; height: 19px; }
.stat-icon.rx { background: var(--accent-soft); color: var(--accent); }
.stat-icon.tx { background: var(--ok-soft); color: var(--ok); }
.stat-icon.usage { background: var(--warn-soft); color: var(--warn); }
.stat-icon.devices { background: var(--danger-soft); color: var(--danger); }
.summary-label { font-size: 0.76rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; }
.summary-value { font-size: 1.35rem; font-weight: 700; margin-top: 3px; line-height: 1.2; }
.summary-sub { font-size: 0.76rem; color: var(--muted); margin-top: 1px; }

/* ---------- Side menu ---------- */
.menu-overlay {
  position: fixed; inset: 0; background: rgba(10, 12, 20, 0.5);
  opacity: 0; pointer-events: none; transition: opacity 0.18s ease;
  z-index: 40;
}
.menu-overlay.open { opacity: 1; pointer-events: auto; }

body.menu-open { overflow: hidden; }

.side-menu {
  position: fixed; top: 0; left: 0; bottom: 0; width: 260px; max-width: 82vw;
  background: var(--panel); border-right: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  padding: 16px 12px; display: flex; flex-direction: column; gap: 4px;
  transform: translateX(-100%);
  transition: transform 0.2s ease;
  z-index: 50;
}
.side-menu.open { transform: translateX(0); }
.side-menu-head {
  display: flex; align-items: center; gap: 12px;
  padding: 4px 8px 16px; margin-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.menu-link {
  display: flex; align-items: center; gap: 12px;
  background: none; border: none;
  padding: 12px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  text-align: left;
  width: 100%;
  transition: color 0.15s ease, background 0.15s ease;
}
.menu-link svg { width: 18px; height: 18px; flex-shrink: 0; }
.menu-link:hover { color: var(--text); background: var(--panel-2); transform: none; }
.menu-link.active { color: var(--accent); background: var(--accent-soft); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- Schedule list ---------- */
.schedule-list { display: flex; flex-direction: column; gap: 10px; }
.schedule-row {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap;
}
.schedule-info { display: flex; flex-direction: column; gap: 3px; }
.schedule-device { font-weight: 700; font-size: 0.95rem; }
.schedule-detail { font-size: 0.8rem; color: var(--muted); }
.schedule-row .chip { margin-top: 0; }

/* ---------- Section heading ---------- */
.section-title {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 10px;
  margin: 4px 2px 12px;
}
.section-title h2 { font-size: 1rem; font-weight: 700; margin: 0; }
.section-title .count { font-size: 0.8rem; color: var(--muted); }

/* ---------- Reports ---------- */
.report-controls { display: flex; align-items: center; gap: 8px; }
.report-controls select {
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
  border-radius: var(--radius-sm); padding: 7px 10px; font-size: 0.82rem; font-weight: 600;
}
.report-panel {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow-sm); margin-bottom: 16px;
}
.report-panel h3 { margin: 0 0 14px; font-size: 0.88rem; font-weight: 700; }
.ranking-list { display: flex; flex-direction: column; gap: 10px; }
.ranking-row { display: flex; align-items: center; gap: 12px; }
.ranking-rank {
  width: 22px; flex-shrink: 0; font-size: 0.78rem; font-weight: 700; color: var(--muted); text-align: center;
}
.ranking-info { flex: 1; min-width: 0; }
.ranking-label { font-size: 0.85rem; font-weight: 600; display: flex; justify-content: space-between; gap: 8px; }
.ranking-bar-track { height: 7px; border-radius: 999px; background: var(--panel-2); margin-top: 5px; overflow: hidden; }
.ranking-bar-fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }

/* ---------- Device grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }

.empty-state {
  background: var(--panel);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--ok);
  opacity: 0.7;
}
.card.is-blocked::before { background: var(--danger); }
.card.is-offline::before { background: var(--border); }
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }

.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.name { font-weight: 700; font-size: 1rem; display: flex; align-items: center; gap: 8px; }
.sub { color: var(--muted); font-size: 0.8rem; margin-top: 3px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; flex-shrink: 0; box-shadow: 0 0 0 3px transparent; }
.status-dot.online { background: var(--ok); box-shadow: 0 0 0 3px var(--ok-soft); }
.status-dot.blocked { background: var(--danger); box-shadow: 0 0 0 3px var(--danger-soft); }

.chip {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 0.72rem; font-weight: 600;
  padding: 2px 8px; border-radius: 999px;
  background: var(--panel-2); color: var(--muted);
  border: 1px solid var(--border);
  margin-top: 8px;
}
.chip.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.chip.new { background: var(--accent-soft); color: var(--accent); border-color: transparent; cursor: pointer; }
.chip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.chip-row .chip { margin-top: 8px; }

.rename-btn {
  width: 30px; height: 30px; padding: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: 8px; flex-shrink: 0;
}
.rename-btn svg { width: 14px; height: 14px; }

.rates {
  display: flex; gap: 10px; margin: 12px 0 6px;
}
.rate-pill {
  flex: 1;
  display: flex; align-items: center; gap: 6px;
  background: var(--panel-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  font-size: 0.8rem;
}
.rate-pill svg { width: 13px; height: 13px; flex-shrink: 0; }
.rate-pill.rx svg { color: var(--accent); }
.rate-pill.tx svg { color: var(--ok); }
.rate-pill b { color: var(--text); font-weight: 700; margin-left: auto; }

.usage-line { display: flex; justify-content: space-between; font-size: 0.8rem; color: var(--muted); margin: 6px 0 2px; }
.usage-line b { color: var(--text); }

canvas { max-height: 56px; margin-top: 8px; }

.actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 12px; }
button {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.12s ease;
}
button svg { width: 13px; height: 13px; }
button:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
button:active { transform: translateY(0); }
button.danger { color: var(--danger); border-color: var(--danger-soft); background: var(--danger-soft); }
button.danger:hover { background: var(--danger); color: #fff; border-color: var(--danger); }
button.ok-action { color: var(--ok); border-color: var(--ok-soft); background: var(--ok-soft); }
button.ok-action:hover { background: var(--ok); color: #fff; border-color: var(--ok); }
button.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border-color: transparent; box-shadow: var(--shadow-sm); }
button.primary:hover { color: #fff; filter: brightness(1.06); }
button.ghost { background: transparent; border-color: var(--border); }
.actions button { flex: 1; min-width: 0; white-space: nowrap; }

/* ---------- Dialogs ---------- */
dialog {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 0;
  max-width: 380px;
  width: calc(100% - 32px);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
dialog::backdrop { background: rgba(10, 12, 20, 0.5); backdrop-filter: blur(2px); }
dialog[open] { animation: dialog-in 0.16s ease; }
@keyframes dialog-in { from { opacity: 0; transform: translateY(6px) scale(0.98); } to { opacity: 1; transform: none; } }

.dialog-body { padding: 20px 20px 4px; max-height: 72vh; overflow-y: auto; }
dialog h3 { font-size: 1.05rem; margin: 0; padding: 18px 20px 0; font-weight: 700; }
.dialog-help { font-size: 0.82rem; color: var(--muted); margin: 6px 0 14px; line-height: 1.4; }

label { display: block; font-size: 0.78rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.02em; margin: 14px 0 6px; }
label:first-of-type { margin-top: 0; }
input, select {
  width: 100%; padding: 9px 10px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  font-family: inherit; font-size: 0.9rem;
}
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.dialog-actions {
  display: flex; justify-content: flex-end; gap: 8px;
  padding: 14px 20px; margin-top: 4px;
  border-top: 1px solid var(--border);
  background: var(--panel-2);
}
.dialog-actions button { flex: 0 0 auto; }

.days { display: flex; gap: 6px; flex-wrap: wrap; }
.days label {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--panel-2);
  cursor: pointer; margin: 0; font-size: 0.78rem; font-weight: 700;
  color: var(--muted); text-transform: none; letter-spacing: 0;
  position: relative;
}
.days input { position: absolute; opacity: 0; }
.days label:has(input:checked) { background: var(--accent); border-color: var(--accent); color: #fff; }

.preset-list { display: flex; flex-direction: column; gap: 8px; }
.preset-option {
  display: flex; align-items: flex-start; gap: 10px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 12px; cursor: pointer; width: auto; margin: 0;
  transition: border-color 0.12s ease, background 0.12s ease;
}
.preset-option:hover { border-color: var(--accent-2); }
.preset-option input { width: auto; margin-top: 3px; accent-color: var(--accent); }
.preset-option.selected { border-color: var(--accent); background: var(--accent-soft); }
.preset-title { font-weight: 700; font-size: 0.88rem; color: var(--text); }
.preset-desc { font-size: 0.78rem; color: var(--muted); margin-top: 1px; line-height: 1.35; }

@media (max-width: 480px) {
  body { padding: 14px; }
  .actions button { flex: 1 1 45%; }
}