:root {
  --bg: #0b0e14;
  --panel: #12161e;
  --line: #1e2633;
  --text: #eef2f8;
  --muted: #8b96a8;
  --accent: #3b82f6;
  --accent-soft: rgba(59, 130, 246, 0.15);
  --good: #34d399;
  --good-soft: rgba(52, 211, 153, 0.18);
  --bad: #f87171;
  --bad-soft: rgba(248, 113, 113, 0.18);
  --btn: #1a2230;
  --btn-hover: #243044;
  --program: #16a34a;
  --program-soft: rgba(22, 163, 74, 0.22);
  --preview: #ea580c;
  --preview-soft: rgba(234, 88, 12, 0.22);
  --cell: #182233;
  --fx: #2a1f45;
  --lt: #0f766e;
  --warn: #9a3412;
  --radius: 12px;
  --touch: 44px;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background:
    radial-gradient(ellipse 80% 45% at 50% -8%, #152033 0%, transparent 55%),
    var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  padding-bottom: var(--safe-b);
}

.app {
  max-width: 560px;
  margin: 0 auto;
  padding: calc(1.25rem + var(--safe-t)) 0.9rem calc(1.75rem + var(--safe-b));
}

.top {
  text-align: center;
  margin-bottom: 1.25rem;
}
.eyebrow {
  margin: 0 0 0.35rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}
.top h1 {
  margin: 0;
  font-size: clamp(1.4rem, 5vw, 1.85rem);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 2px);
  padding: 1.25rem 1.1rem;
}

.control {
  padding: 0.85rem 0.75rem 1rem;
}

.auth h2,
.auth-title {
  margin: 0 0 0.35rem;
  font-size: 1.08rem;
  font-weight: 650;
}

.lead {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}
.lead.compact { margin-bottom: 0.55rem; font-size: 0.82rem; }
.lead.tip {
  padding: 0.7rem 0.85rem;
  background: rgba(15, 118, 110, 0.12);
  border: 1px solid rgba(15, 118, 110, 0.28);
  border-radius: 10px;
  color: #99f6e4;
  font-size: 0.84rem;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.auth-row {
  display: flex;
  gap: 0.6rem;
  align-items: stretch;
}
#pairing-code {
  flex: 1;
  min-height: var(--touch);
  padding: 0.9rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #0a0e14;
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-align: center;
}
#pairing-code:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
#btn-connect {
  min-height: var(--touch);
  padding: 0 1.35rem;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 650;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}
#btn-connect:hover { filter: brightness(1.08); }

.msg {
  min-height: 1.25em;
  margin: 0.75rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}
.msg.err { color: var(--bad); }
.msg.ok { color: var(--good); }

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch);
  padding: 0.85rem 1.2rem;
  border-radius: 12px;
  background: #fff;
  color: #0a0c10;
  font-weight: 650;
  font-size: 0.95rem;
  text-decoration: none;
  text-align: center;
  border: none;
  cursor: pointer;
}
.btn-primary:hover { opacity: 0.92; }

.hidden { display: none !important; }

/* —— status —— */
.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 0.65rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(10, 14, 20, 0.92);
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(10px);
}
.status-left { min-width: 0; }
.device-name {
  font-size: 1rem;
  font-weight: 650;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.78rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.15rem 0.5rem 0.15rem 0.4rem;
  background: rgba(255,255,255,0.02);
}
.dot {
  width: 0.45rem; height: 0.45rem;
  border-radius: 50%;
  display: inline-block;
  background: var(--bad);
  box-shadow: 0 0 0 3px var(--bad-soft);
}
.dot.on { background: var(--good); box-shadow: 0 0 0 3px var(--good-soft); }

button.ghost {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  border-radius: 10px;
  padding: 0.5rem 0.8rem;
  min-height: var(--touch);
  cursor: pointer;
  font-size: 0.86rem;
}
button.ghost:hover { color: var(--text); border-color: #334155; background: var(--btn); }

button {
  border: none;
  border-radius: 8px;
  padding: 0.65rem 0.7rem;
  background: var(--btn);
  color: var(--text);
  font-size: 0.9rem;
  cursor: pointer;
  min-height: var(--touch);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transition: background 0.1s ease, transform 0.06s ease, box-shadow 0.1s ease;
}
button:hover { background: var(--btn-hover); }
button:active { transform: scale(0.97); }
button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-soft);
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  min-height: var(--touch);
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #0a0e14;
  color: var(--text);
  font-size: 0.98rem;
}
input:focus-visible, select:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
input.field-name,
input.lt-text {
  letter-spacing: normal;
  text-transform: none;
  text-align: left;
  font-weight: 400;
}
label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

/* —— Tabs（对标 Switcher / Titles） —— */
.main-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
  padding: 0.3rem;
  background: #0a0e14;
  border: 1px solid var(--line);
  border-radius: 12px;
}
.main-tab {
  min-height: 2.55rem;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  font-weight: 650;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}
.main-tab.active {
  background: #1e293b;
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.18);
}
.main-tab:hover:not(.active) { color: var(--text); background: rgba(255,255,255,0.04); }

.tab-view { display: block; }

/* —— Switcher buses —— */
.switcher-toolbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
}
.input-count-label {
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted);
}
#input-count {
  width: auto;
  min-width: 4.2rem;
  min-height: 2.2rem;
  padding: 0.35rem 0.55rem;
  font-size: 0.88rem;
}

.bus-row {
  margin-bottom: 0.7rem;
  padding: 0.55rem 0.5rem 0.6rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.22);
}
.bus-program { border-color: rgba(22, 163, 74, 0.28); }
.bus-preview { border-color: rgba(234, 88, 12, 0.28); }

.bus-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
  padding: 0 0.15rem;
}
.bus-tag {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.bus-tag.program { color: #4ade80; }
.bus-tag.preview { color: #fb923c; }
.bus-hint {
  font-size: 0.7rem;
  color: var(--muted);
  text-align: right;
}

.bus-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.35rem;
}
.bus-grid.cols-6 { grid-template-columns: repeat(3, 1fr); }
.bus-grid.cols-12 { grid-template-columns: repeat(4, 1fr); }

.bus-cell {
  min-height: 3rem;
  border-radius: 8px;
  background: var(--cell);
  border: 1px solid rgba(148, 163, 184, 0.12);
  color: #cbd5e1;
  font-size: 1.05rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  padding: 0.4rem 0.25rem;
}
.bus-cell:hover { background: #223047; color: #fff; }

.bus-program .bus-cell.is-active {
  background: var(--program);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 0 2px var(--program-soft), 0 4px 14px rgba(22, 163, 74, 0.35);
}
.bus-preview .bus-cell.is-active {
  background: var(--preview);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 0 2px var(--preview-soft), 0 4px 14px rgba(234, 88, 12, 0.35);
}

/* —— Overlay rows —— */
.overlay-section {
  margin: 0.35rem 0 0.75rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.35rem 0.55rem 0.55rem;
  background: rgba(0,0,0,0.15);
}
.overlay-section > summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 650;
  list-style: none;
  min-height: 2.2rem;
  display: flex;
  align-items: center;
  user-select: none;
}
.overlay-section > summary::-webkit-details-marker { display: none; }
.overlay-section > summary::before { content: "▸ "; color: var(--accent); }
.overlay-section[open] > summary::before { content: "▾ "; }
.overlay-lead {
  margin: 0 0 0.55rem;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.45;
}
.overlay-rows { display: flex; flex-direction: column; gap: 0.45rem; }
.overlay-row {
  display: grid;
  grid-template-columns: 2.4rem 1fr 2.6rem;
  gap: 0.35rem;
  align-items: center;
}
.overlay-row-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.02em;
}
.overlay-row .bus-grid {
  gap: 0.28rem;
}
.overlay-row .bus-cell {
  min-height: 2.35rem;
  font-size: 0.88rem;
  padding: 0.25rem;
}
.overlay-row .bus-cell.is-on {
  background: #2563eb;
  border-color: transparent;
  color: #fff;
}
.btn-ov-off {
  min-height: 2.35rem;
  padding: 0.25rem;
  font-size: 0.75rem;
  font-weight: 650;
  background: #3f1d1d;
  color: #fecaca;
}
.btn-all-off {
  width: 100%;
  margin-top: 0.55rem;
  background: #3f1d1d;
  color: #fecaca;
  font-weight: 650;
  font-size: 0.88rem;
}

/* —— Transition bar —— */
.transition-bar {
  position: sticky;
  bottom: calc(0.35rem + var(--safe-b));
  z-index: 25;
  margin-top: 0.35rem;
  padding: 0.55rem 0.5rem 0.6rem;
  border-radius: 12px;
  border: 1px solid rgba(124, 58, 237, 0.28);
  background: rgba(18, 16, 28, 0.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 -8px 28px rgba(0,0,0,0.35);
}
.transition-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
  padding: 0 0.1rem;
}
.transition-title {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #c4b5fd;
}
.dur-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.3rem;
}
.btn-dur {
  min-height: 2rem;
  padding: 0.25rem 0.55rem;
  font-size: 0.78rem;
  border: 1px solid var(--line);
  background: #1a1628;
  color: var(--muted);
}
.btn-dur.active {
  background: #6d28d9;
  border-color: transparent;
  color: #fff;
  font-weight: 650;
}

.transition-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.35rem;
}
.btn-fx {
  min-height: 2.55rem;
  background: var(--fx);
  border: 1px solid rgba(124, 58, 237, 0.22);
  font-size: 0.8rem;
  font-weight: 650;
  padding: 0.35rem 0.25rem;
}
.btn-fx:hover { background: #3b2760; }
.btn-fx.btn-cut {
  background: #1e3a5f;
  border-color: rgba(59, 130, 246, 0.35);
}
.btn-fx.btn-warn {
  background: var(--warn);
  border-color: transparent;
  font-weight: 700;
}

/* —— Titles —— */
.titles-panel { padding: 0.15rem 0.15rem 0.35rem; }
.lt-form { display: flex; flex-direction: column; gap: 0.7rem; }
.lt-form label { margin: 0; }
.lt-form input { margin-top: 0.3rem; }
.lt-actions {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 0.5rem;
  margin-top: 0.15rem;
}
.btn-lt-on { background: var(--lt); font-weight: 700; }
.btn-lt-on:hover { filter: brightness(1.1); }
.btn-lt-off { background: #243044; }

.subhead {
  margin: 1.15rem 0 0.45rem;
  font-size: 0.9rem;
  font-weight: 650;
  color: var(--muted);
}
.lt-presets { display: flex; flex-direction: column; gap: 0.4rem; }
.hint.empty {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  font-style: italic;
}
.lt-preset { display: flex; gap: 0.4rem; }
.btn-preset {
  flex: 1;
  text-align: left;
  background: #134e4a;
  font-size: 0.9rem;
}
.btn-preset:hover { background: var(--lt); }
.btn-preset-del {
  width: var(--touch);
  min-width: var(--touch);
  padding: 0;
  background: #3f1d1d;
  color: #fca5a5;
}

.advanced { margin-top: 1rem; }
.advanced > summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  list-style: none;
  margin-bottom: 0.65rem;
  min-height: 2.2rem;
  display: flex;
  align-items: center;
  user-select: none;
}
.advanced > summary::-webkit-details-marker { display: none; }
.advanced > summary::before { content: "▸ "; color: var(--accent); }
.advanced[open] > summary::before { content: "▾ "; }

.config-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem 0.85rem;
}
.config-grid label { margin: 0; }
.config-grid input,
.config-grid select { margin-top: 0.3rem; }

.log-block {
  margin-top: 0.85rem;
  border-top: 1px solid var(--line);
  padding-top: 0.35rem;
}
.log-block > summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  list-style: none;
  min-height: 2rem;
  display: flex;
  align-items: center;
  user-select: none;
}
.log-block > summary::-webkit-details-marker { display: none; }
.log-block > summary::before { content: "▸ "; color: var(--accent); }
.log-block[open] > summary::before { content: "▾ "; }

.log {
  margin: 0.35rem 0 0;
  background: #0a0e14;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem;
  font-size: 0.72rem;
  max-height: 140px;
  overflow: auto;
  color: #9fb0c9;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.foot {
  text-align: center;
  margin-top: 1.35rem;
  color: #4b5568;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

/* —— 三步引导 —— */
.auth-intro { margin-bottom: 1.35rem; }
.setup-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.setup-step {
  display: grid;
  grid-template-columns: 2.25rem 1fr;
  gap: 0.85rem;
  position: relative;
  padding-bottom: 1.35rem;
}
.setup-step:last-child { padding-bottom: 0; }
.setup-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 1.05rem;
  top: 2.35rem;
  bottom: 0.15rem;
  width: 2px;
  background: linear-gradient(180deg, #2a3548, transparent);
}
.step-index {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  background: #1a2230;
  border: 1px solid var(--line);
  color: var(--muted);
  z-index: 1;
}
.setup-step.is-current .step-index {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.step-body h3 {
  margin: 0.15rem 0 0.35rem;
  font-size: 1.02rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.step-body > p {
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}
.step-actions {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}
.setup-step .auth-row { margin-top: 0.15rem; }
.setup-step .msg { margin-top: 0.55rem; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch);
  padding: 0.7rem 1.1rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}
.btn-secondary:hover { border-color: var(--accent); color: #93c5fd; }

/* QQ modal */
.modal-root {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background: rgba(4, 6, 10, 0.72);
  backdrop-filter: blur(6px);
}
.modal-root[hidden] { display: none !important; }
.modal {
  width: min(100%, 420px);
  background: #141a24;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.35rem 1.25rem 1.2rem;
  box-shadow: 0 24px 60px rgba(0,0,0,0.45);
}
.modal h3 {
  margin: 0 0 0.65rem;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.modal > p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}
.modal-hint { margin-top: 0.85rem !important; }
.qq-big {
  margin: 0.75rem 0 0.35rem !important;
  font-size: 1.7rem !important;
  font-weight: 750 !important;
  letter-spacing: 0.06em;
  color: var(--text) !important;
  text-align: center;
}
.modal-sub {
  text-align: center;
  font-size: 0.82rem !important;
  margin-bottom: 1rem !important;
}
.modal-actions {
  display: flex;
  gap: 0.55rem;
  justify-content: flex-end;
}
.btn-ghost {
  min-height: var(--touch);
  padding: 0.65rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
}
.btn-ghost:hover { color: var(--text); }
.qq-copied {
  margin: 0.85rem 0 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--good);
}

@media (max-width: 480px) {
  .app { padding: calc(1rem + var(--safe-t)) 0.65rem calc(1.5rem + var(--safe-b)); }
  .panel { padding: 1.1rem 0.9rem; }
  .control { padding: 0.7rem 0.55rem 0.85rem; }
  .auth-row { flex-direction: column; }
  #btn-connect { width: 100%; }
  #pairing-code { font-size: 1.1rem; letter-spacing: 0.14em; }
  .lt-actions { grid-template-columns: 1fr; }
  .config-grid { grid-template-columns: 1fr; }
  .transition-grid { grid-template-columns: repeat(3, 1fr); }
  .bus-hint { display: none; }
  .setup-step { grid-template-columns: 2rem 1fr; gap: 0.7rem; }
  .step-index { width: 2rem; height: 2rem; font-size: 0.88rem; }
  .setup-step:not(:last-child)::before { left: 0.92rem; }
}

@media (min-width: 420px) {
  .bus-grid.cols-6 { grid-template-columns: repeat(6, 1fr); }
}