:root {
  --bg: #0a0a0a;
  --panel: #161616;
  --panel-2: #1f1f1f;
  --text: #f2f2f2;
  --muted: #9a9a9a;
  --accent: #ff3b30;
  --ja: #3b82f6;
  --zh: #f59e0b;
  --ok: #22c55e;
  --border: #2a2a2a;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans",
    "Noto Sans JP", "Segoe UI", sans-serif;
  -webkit-text-size-adjust: 100%;
}

#app {
  max-width: 720px;
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) 16px
    max(24px, env(safe-area-inset-bottom)) 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 100vh;
}

header h1 {
  font-size: 20px;
  margin: 0 0 6px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.status {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  min-height: 20px;
}
.status.live {
  color: var(--ok);
  font-weight: 700;
}
.status.error {
  color: var(--accent);
  font-weight: 700;
}

.controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.dir-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 22px 12px;
  border: 2px solid var(--border);
  border-radius: 18px;
  background: var(--panel);
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
  transition: transform 0.08s ease, border-color 0.15s ease,
    background 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}
.dir-btn:active {
  transform: scale(0.97);
}
.dir-flag {
  font-size: 26px;
}
.dir-label {
  font-size: 19px;
  font-weight: 800;
}
.dir-sub {
  font-size: 12px;
  color: var(--muted);
}

#btn-ja.active {
  border-color: var(--ja);
  background: color-mix(in srgb, var(--ja) 18%, var(--panel));
  animation: pulse-ja 1.4s ease-in-out infinite;
}
#btn-zh.active {
  border-color: var(--zh);
  background: color-mix(in srgb, var(--zh) 18%, var(--panel));
  animation: pulse-zh 1.4s ease-in-out infinite;
}
@keyframes pulse-ja {
  0%,
  100% {
    box-shadow: 0 0 0 0 color-mix(in srgb, var(--ja) 45%, transparent);
  }
  50% {
    box-shadow: 0 0 0 10px transparent;
  }
}
@keyframes pulse-zh {
  0%,
  100% {
    box-shadow: 0 0 0 0 color-mix(in srgb, var(--zh) 45%, transparent);
  }
  50% {
    box-shadow: 0 0 0 10px transparent;
  }
}

.hint {
  margin: -4px 2px 0;
  font-size: 12px;
  color: var(--muted);
}

.enable-sound {
  padding: 14px;
  border-radius: 14px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

.panels {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 16px;
  min-height: 92px;
}
.panel h2 {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}
.log {
  font-size: 18px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}
.log p {
  margin: 0 0 6px;
}
.live {
  font-size: 18px;
  line-height: 1.6;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-word;
}

#source-panel.hidden {
  display: none;
}

.settings {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 6px 14px;
}
.settings summary {
  cursor: pointer;
  padding: 8px 0;
  font-size: 14px;
  color: var(--muted);
  user-select: none;
}
.settings-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 8px 0 12px;
}
.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 15px;
}
.row select,
.row input[type="range"] {
  flex: 0 0 auto;
}
.row select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 15px;
}
.row.switch input {
  width: 22px;
  height: 22px;
  accent-color: var(--ok);
}
input[type="range"] {
  width: 160px;
  accent-color: var(--accent);
}

.gate {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 50;
}
.gate-box {
  width: 100%;
  max-width: 320px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.gate-box h2 {
  margin: 0;
  font-size: 18px;
}
.gate-box input {
  padding: 14px;
  font-size: 17px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
}
.gate-box button {
  padding: 14px;
  font-size: 17px;
  font-weight: 700;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
.gate-msg {
  margin: 0;
  min-height: 18px;
  font-size: 13px;
  color: var(--accent);
}

.hidden {
  display: none !important;
}