:root {
  color-scheme: light dark;
  --bg: #eef1f6;
  --bg-grad-1: #e9f7f4;
  --bg-grad-2: #eef1f6;
  --panel: #ffffff;
  --panel-2: #f7f9fb;
  --ink: #131b23;
  --muted: #687683;
  --faint: #93a0ac;
  --line: #e2e8ee;
  --line-strong: #d3dbe3;
  --accent: #0fb39a;
  --accent-strong: #0a8f7c;
  --accent-ink: #06564a;
  --accent-soft: #e3f7f2;
  --secondary: #3b6ea5;
  --danger: #e0483a;
  --danger-soft: #fdecea;
  --warning: #c87f12;
  --warning-soft: #fdf3df;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow: 0 10px 30px -12px rgba(16, 35, 50, 0.18);
  --shadow-lg: 0 24px 48px -20px rgba(16, 35, 50, 0.28);
  --radius: 16px;
  --radius-sm: 11px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1117;
    --bg-grad-1: #0c1a1c;
    --bg-grad-2: #0d1117;
    --panel: #161c24;
    --panel-2: #1b232d;
    --ink: #e7edf3;
    --muted: #93a2b1;
    --faint: #6a7889;
    --line: #252e39;
    --line-strong: #313c49;
    --accent: #2fd4b6;
    --accent-strong: #21b89c;
    --accent-ink: #9af0df;
    --accent-soft: #11302c;
    --secondary: #6aa6e6;
    --danger: #ff6b5e;
    --danger-soft: #2c1715;
    --warning: #e3a83a;
    --warning-soft: #2a2210;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow: 0 16px 40px -18px rgba(0, 0, 0, 0.7);
    --shadow-lg: 0 28px 60px -24px rgba(0, 0, 0, 0.8);
  }
}

/* Manual dark override (settings → テーマ → ダーク) */
:root[data-theme="dark"] {
  --bg: #0d1117;
  --bg-grad-1: #0c1a1c;
  --bg-grad-2: #0d1117;
  --panel: #161c24;
  --panel-2: #1b232d;
  --ink: #e7edf3;
  --muted: #93a2b1;
  --faint: #6a7889;
  --line: #252e39;
  --line-strong: #313c49;
  --accent: #2fd4b6;
  --accent-strong: #21b89c;
  --accent-ink: #9af0df;
  --accent-soft: #11302c;
  --secondary: #6aa6e6;
  --danger: #ff6b5e;
  --danger-soft: #2c1715;
  --warning: #e3a83a;
  --warning-soft: #2a2210;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow: 0 16px 40px -18px rgba(0, 0, 0, 0.7);
  --shadow-lg: 0 28px 60px -24px rgba(0, 0, 0, 0.8);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 85% -10%, var(--bg-grad-1), transparent 60%),
    var(--bg);
  color: var(--ink);
  font-family: Inter, "Hiragino Sans", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

button, input, select { font: inherit; color: inherit; }

.app-shell {
  width: min(940px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 48px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 13px; min-width: 0; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 13px;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.eyebrow {
  margin: 0;
  color: var(--accent-strong);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 { margin: 0; font-size: clamp(20px, 3.4vw, 26px); line-height: 1.1; letter-spacing: -0.01em; }
h2 { margin: 0; font-size: 16px; letter-spacing: -0.01em; }

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

/* ---------- Status pill ---------- */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-size: 13px;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}

.status-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--faint);
  box-shadow: 0 0 0 0 rgba(0,0,0,0);
}

.status-pill-online { color: var(--accent-strong); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); background: var(--accent-soft); }
.status-pill-online .status-dot { background: var(--accent); animation: pulse 1.8s infinite; }
.status-pill-busy { color: var(--secondary); border-color: color-mix(in srgb, var(--secondary) 35%, var(--line)); }
.status-pill-busy .status-dot { background: var(--secondary); animation: pulse 1s infinite; }
.status-pill-error { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--line)); background: var(--danger-soft); }
.status-pill-error .status-dot { background: var(--danger); }
.status-pill-idle { color: var(--muted); }

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, currentColor 55%, transparent); }
  70% { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* ---------- Buttons ---------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 38px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 800;
  font-size: 14px;
  white-space: nowrap;
  transition: transform .12s ease, background-color .12s ease, border-color .12s ease, color .12s ease, box-shadow .12s ease;
}
.button:hover { transform: translateY(-1px); }
.button:active { transform: translateY(0); }
.button:disabled { cursor: not-allowed; opacity: .5; transform: none; box-shadow: none; }

.button-primary { color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-strong)); box-shadow: 0 8px 18px -8px color-mix(in srgb, var(--accent) 70%, transparent); }
.button-primary:hover { box-shadow: 0 12px 22px -8px color-mix(in srgb, var(--accent) 75%, transparent); }
.button-secondary { color: #fff; background: var(--secondary); }
.button-secondary:hover { filter: brightness(1.05); }
.button-quiet { color: var(--ink); background: var(--panel-2); border-color: var(--line); }
.button-quiet:hover { border-color: var(--line-strong); }
.button-ghost { color: var(--muted); background: transparent; border-color: var(--line); height: 34px; padding: 0 12px; }
.button-ghost:hover { color: var(--ink); border-color: var(--line-strong); background: var(--panel-2); }
.button-ghost-danger { color: var(--danger); background: transparent; border-color: color-mix(in srgb, var(--danger) 30%, var(--line)); height: 34px; padding: 0 12px; }
.button-ghost-danger:hover { background: var(--danger-soft); }
.button-danger { color: #fff; background: var(--danger); }

.icon-action {
  width: 34px;
  height: 34px;
  padding: 0;
  color: var(--muted);
  background: transparent;
  border-color: var(--line);
}
.icon-action:hover {
  color: var(--ink);
  border-color: var(--line-strong);
  background: var(--panel-2);
}
.icon-action.is-active {
  color: var(--accent-strong);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
  background: var(--accent-soft);
}
.icon-action-danger {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 30%, var(--line));
}
.icon-action-danger:hover { background: var(--danger-soft); }

.icon-button {
  display: grid; place-items: center;
  width: 38px; height: 38px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: color .12s ease, border-color .12s ease;
}
.icon-button:hover { color: var(--ink); border-color: var(--line-strong); }

/* ---------- Hero ---------- */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero-state { display: flex; align-items: center; gap: 14px; min-width: 0; }
.hero-dot {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--faint);
  flex-shrink: 0;
}
.hero-dot[data-state="online"] { background: var(--accent); box-shadow: 0 0 0 5px var(--accent-soft); animation: pulse 1.8s infinite; }
.hero-dot[data-state="busy"] { background: var(--secondary); box-shadow: 0 0 0 5px color-mix(in srgb, var(--secondary) 16%, transparent); animation: pulse 1s infinite; }
.hero-dot[data-state="error"] { background: var(--danger); box-shadow: 0 0 0 5px var(--danger-soft); }
.hero-state strong { display: block; font-size: 18px; letter-spacing: -0.01em; }
.hero-hint { display: block; color: var(--muted); font-size: 13px; font-weight: 600; }

.hero-stats { display: flex; gap: 26px; flex-wrap: wrap; }
.stat { display: grid; gap: 2px; }
.stat-label { color: var(--faint); font-size: 11px; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.stat strong { font-size: 16px; font-weight: 800; overflow-wrap: anywhere; }
.stat-active strong { color: var(--accent-strong); }
.stat-warning strong { color: var(--warning); }
.stat-muted strong { color: var(--muted); font-weight: 700; font-size: 13px; }

/* ---------- Panels ---------- */
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
}
.panel-tag {
  color: var(--muted); font-size: 12px; font-weight: 800;
  padding: 4px 10px; border-radius: 999px; background: var(--panel-2); border: 1px solid var(--line);
}
.panel-status { color: var(--muted); font-size: 13px; font-weight: 800; }
.panel-status-active { color: var(--accent-strong); }
.panel-status-pairing { color: var(--secondary); }
.scan-heading-actions { display: inline-flex; align-items: center; gap: 12px; }
.button-row { display: inline-flex; gap: 8px; }

/* ---------- Settings ---------- */
.settings-body { padding: 16px 18px; display: grid; gap: 14px; }
.setting-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 0.9fr);
  gap: 18px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
}
.setting-row-label strong { display: block; }
.setting-meta { display: block; margin-top: 3px; color: var(--muted); font-size: 13px; font-weight: 700; }
.settings-foot { margin: 0; color: var(--faint); font-size: 12px; font-weight: 700; }
.range { width: 100%; accent-color: var(--accent); height: 28px; }
.setting-row-stack { grid-template-columns: 1fr; gap: 12px; }
.setting-row-stack .button { justify-self: start; min-width: 96px; }

/* Segmented control (theme) */
.segmented {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel);
  gap: 3px;
  justify-self: end;
}
.segmented-option {
  border: none; background: transparent; cursor: pointer;
  height: 32px; padding: 0 14px; border-radius: 8px;
  color: var(--muted); font-weight: 800; font-size: 13px;
  transition: background .12s ease, color .12s ease;
}
.segmented-option:hover { color: var(--ink); }
.segmented-option.is-active { color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-strong)); }


/* ---------- Device list ---------- */
.device-list { display: grid; gap: 12px; padding: 16px; }

.device-card {
  display: grid;
  gap: 12px;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel);
  box-shadow: var(--shadow-sm);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.device-card[data-connection-state="connected"] {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 22%, transparent), var(--shadow-sm);
}

.device-top { display: flex; align-items: center; gap: 13px; min-width: 0; }
.device-icon {
  display: grid; place-items: center;
  width: 42px; height: 42px;
  border-radius: 12px;
  color: var(--accent-strong);
  background: var(--accent-soft);
  flex-shrink: 0;
}
.device-card[data-connection-state="idle"] .device-icon { color: var(--muted); background: var(--panel-2); }

.device-main { display: grid; gap: 3px; min-width: 0; flex: 1; }
.device-header { display: flex; align-items: center; gap: 9px; min-width: 0; flex-wrap: wrap; }
.device-name { font-size: 16px; font-weight: 800; overflow-wrap: anywhere; }
.device-meta { color: var(--muted); font-size: 12.5px; overflow-wrap: anywhere; }

.device-state {
  display: inline-flex; align-items: center; gap: 5px;
  height: 22px; padding: 0 9px;
  border-radius: 999px;
  font-size: 11.5px; font-weight: 800; white-space: nowrap;
}
.device-state::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.device-state-connected { color: var(--accent-strong); background: var(--accent-soft); }
.device-state-offline { color: var(--danger); background: var(--danger-soft); }

.device-battery {
  display: inline-flex; align-items: center; gap: 5px;
  height: 26px; padding: 0 10px;
  border-radius: 999px;
  color: var(--warning); background: var(--warning-soft);
  font-size: 12px; font-weight: 800; white-space: nowrap;
  flex-shrink: 0;
}
.device-battery-low { color: var(--danger); background: var(--danger-soft); }
.device-battery.is-hidden { display: none; }

.device-actions {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.device-actions-spacer { flex: 1; }
.device-toggle { min-width: 84px; }

.switch {
  display: inline-flex; align-items: center; gap: 8px;
  height: 34px; padding: 0 12px;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--panel-2);
  color: var(--muted); font-size: 13px; font-weight: 800;
  cursor: pointer;
}
.switch input { accent-color: var(--accent); width: 16px; height: 16px; }

.device-settings {
  display: grid; gap: 12px;
  padding-top: 13px;
  border-top: 1px dashed var(--line);
}
.device-settings:empty { display: none; padding: 0; border: none; }
.device-settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
.button-map-grid { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }

.setting-subhead { margin: 2px 0 -2px; color: var(--muted); font-size: 12px; font-weight: 800; }
.setting-field-wide { grid-column: 1 / -1; }
.side-toggle { justify-self: start; height: 32px; font-size: 13px; }

/* Press-to-detect */
.detect-bar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.detect-msg { color: var(--muted); font-size: 13px; font-weight: 700; }
.detect-msg.is-live { color: var(--accent-strong); }
.setting-field.is-detected select { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.setting-field.is-detected label { color: var(--accent-strong); }
.setting-field.is-detected label::after { content: " ●"; color: var(--accent); }
@keyframes detectflash {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 75%, transparent); }
  100% { box-shadow: 0 0 0 12px transparent; }
}
.setting-field.is-detected select { animation: detectflash .9s ease-out; }
.button-ghost.is-active { color: var(--accent-strong); border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); background: var(--accent-soft); }

.setting-field { display: grid; gap: 6px; }
.setting-field label { color: var(--muted); font-size: 12px; font-weight: 800; }
.setting-field select, .setting-field input {
  width: 100%; height: 38px;
  border: 1px solid var(--line); border-radius: 10px;
  padding: 0 11px; background: var(--panel); color: var(--ink);
}
.setting-field select:focus, .setting-field input:focus { outline: 2px solid color-mix(in srgb, var(--accent) 50%, transparent); outline-offset: 1px; border-color: var(--accent); }
.setting-field input[type="range"] { padding: 0; accent-color: var(--accent); }

.device-card-scan .device-top { gap: 13px; }
.device-card-scan .pair-device { flex-shrink: 0; }

/* ---------- Log ---------- */
.log-panel { overflow: visible; }
.log-summary { cursor: pointer; list-style: none; }
.log-summary::-webkit-details-marker { display: none; }
.log-summary h2::before {
  content: "▸"; display: inline-block; margin-right: 8px; color: var(--faint);
  transition: transform .15s ease;
}
details[open] .log-summary h2::before { transform: rotate(90deg); }
.log-output {
  min-height: 140px; max-height: 300px;
  margin: 0; padding: 14px 16px; overflow: auto;
  color: #b8f0e2; background: #0c1418;
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: 12px; line-height: 1.6; white-space: pre-wrap;
}

/* ---------- Empty / foot ---------- */
.empty-state {
  display: grid; place-items: center; gap: 6px;
  min-height: 130px;
  border: 1.5px dashed var(--line-strong); border-radius: var(--radius-sm);
  color: var(--muted); font-weight: 700; text-align: center; padding: 16px;
}
.appfoot { text-align: center; color: var(--faint); font-size: 12px; font-weight: 600; padding: 4px 0; }

.is-hidden { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .hero { flex-direction: column; align-items: flex-start; }
  .hero-stats { gap: 18px 24px; }
}
@media (max-width: 560px) {
  .topbar { gap: 12px; }
  .topbar-actions { width: 100%; justify-content: space-between; }
  .device-actions { gap: 8px; }
  .device-actions-spacer { display: none; flex-basis: 100%; }
  .switch { order: 2; }
  .device-toggle { flex: 1; }
  .setting-row { grid-template-columns: 1fr; }
}