/* ============================================================
   femtoAI EVK — Serial Console app styles
   Built on the femtoAI design system (colors_and_type.css).
   NOTE: Lucide is used for chrome glyphs (plug, chevrons, etc.) —
   a sanctioned substitution per the brand kit (no UI icon font ships).
   ============================================================ */

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg-subtle);
  color: var(--fg);
  font-family: var(--font-sans);
  overflow: hidden;
}
#root { height: 100%; }

.app {
  height: 100%;
  display: grid;
  grid-template-rows: auto auto auto 1fr;
  background:
    radial-gradient(120% 80% at 100% 0%, rgba(80,26,198,0.06), transparent 60%),
    var(--bg-subtle);
}

/* ---------------- Header ---------------- */
.app-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 14px var(--space-6);
  background: var(--color-white);
  border-bottom: 1px solid var(--border);
}
.app-header .logo { height: 26px; width: auto; display: block; }
.app-header .divider {
  width: 1px; height: 22px; background: var(--border-strong); margin: 0 2px;
}
.app-header .app-title {
  font-weight: var(--weight-medium);
  font-size: var(--text-md);
  letter-spacing: var(--tracking-tight);
}
.app-header .app-title .sub {
  color: var(--fg-subtle);
  font-weight: var(--weight-regular);
  font-size: var(--text-sm);
  margin-left: 8px;
}
.app-header .spacer { flex: 1; }

/* status pill */
.status {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: var(--text-sm); font-weight: var(--weight-medium);
  padding: 7px 14px 7px 12px; border-radius: var(--radius-pill);
  border: 1px solid var(--border); background: var(--bg-subtle);
  color: var(--fg-muted);
}
.status .dot {
  width: 9px; height: 9px; border-radius: 50%; background: var(--fg-subtle);
  box-shadow: 0 0 0 0 transparent;
}
.status[data-state="open"] { color: #157a4f; background: rgba(109,229,190,0.16); border-color: rgba(109,229,190,0.5); }
.status[data-state="open"] .dot { background: #1aa86a; box-shadow: 0 0 0 4px rgba(109,229,190,0.25); animation: pulse 2s var(--ease-in-out) infinite; }
.status[data-state="connecting"], .status[data-state="closing"] { color: var(--color-indigo); background: var(--color-lilac); border-color: var(--border-strong); }
.status[data-state="connecting"] .dot, .status[data-state="closing"] .dot { background: var(--color-indigo); animation: pulse 1s var(--ease-in-out) infinite; }
.status[data-state="error"] { color: #b23b2e; background: rgba(249,128,61,0.14); border-color: rgba(249,128,61,0.45); }
.status[data-state="error"] .dot { background: var(--color-spark); }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.45; } }

/* ---------------- Toolbar ---------------- */
.toolbar {
  display: flex; align-items: flex-end; flex-wrap: wrap; gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  background: var(--color-white);
  border-bottom: 1px solid var(--border);
}
.field { display: flex; flex-direction: column; gap: 6px; }
.field > label {
  font-size: 11px; letter-spacing: var(--tracking-wider); text-transform: uppercase;
  color: var(--fg-muted); font-weight: var(--weight-medium);
}
.field select, .field input[type="text"] {
  font-family: inherit; font-size: var(--text-sm); color: var(--fg);
  padding: 9px 12px; border: 1px solid var(--border-strong); border-radius: var(--radius-md);
  background: var(--color-white); transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
  min-width: 110px;
}
.field select:focus, .field input[type="text"]:focus {
  outline: none; border-color: var(--color-indigo); box-shadow: var(--focus-ring);
}
.field select:disabled, .field input:disabled { opacity: 0.5; cursor: not-allowed; }

.spu-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 9px 3px 7px; border-radius: var(--radius-full);
  font: var(--weight-medium) 11px/1 var(--font-mono); letter-spacing: 0.07em;
  white-space: nowrap; border: 1px solid transparent;
}
.spu-badge::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0;
}
.spu-badge--active  { background: rgba(34,197,94,0.1); color: #22c55e; border-color: rgba(34,197,94,0.28); }
.spu-badge--active::before  { background: #22c55e; box-shadow: 0 0 5px rgba(34,197,94,0.6); }
.spu-badge--loopback { background: rgba(148,163,184,0.08); color: #94a3b8; border-color: rgba(148,163,184,0.22); }
.spu-badge--loopback::before { background: #94a3b8; }

.toolbar .spacer { flex: 1; }
.toolbar .stat-strip { display: flex; gap: var(--space-5); align-items: flex-end; }
.stat { display: flex; flex-direction: column; gap: 2px; min-width: 70px; }
.stat .k { font-size: 11px; letter-spacing: var(--tracking-wider); text-transform: uppercase; color: var(--fg-subtle); font-weight: var(--weight-medium); }
.stat .v { font-family: var(--font-mono); font-size: var(--text-base); font-weight: var(--weight-medium); color: var(--fg); font-variant-numeric: tabular-nums; }
.stat .v.rx { color: var(--color-indigo); }
.stat .v.tx { color: var(--color-spark); }

/* ---------------- Buttons ---------------- */
.btn {
  font-family: inherit; font-weight: var(--weight-bold); font-size: var(--text-sm);
  padding: 10px 20px; border-radius: var(--radius-pill); border: 1.5px solid transparent;
  cursor: pointer; transition: all var(--duration-fast) var(--ease-out);
  display: inline-flex; align-items: center; gap: 8px; white-space: nowrap;
}
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn .ico { width: 17px; height: 17px; }
.btn-primary { background: var(--color-indigo); color: #fff; }
.btn-primary:not(:disabled):hover { background: var(--color-midnight-violet); }
.btn-danger { background: var(--color-white); color: #b23b2e; border-color: rgba(178,59,46,0.5); }
.btn-danger:not(:disabled):hover { background: rgba(249,128,61,0.12); }
.btn-ghost { background: transparent; color: var(--color-indigo); border-color: var(--border-strong); }
.btn-ghost:not(:disabled):hover { background: var(--color-lilac); }
.btn-sm { padding: 7px 14px; font-size: var(--text-xs); }
.btn-icon {
  padding: 8px; border-radius: var(--radius-md); border: 1px solid var(--border-strong);
  background: var(--color-white); color: var(--fg-muted); cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: all var(--duration-fast) var(--ease-out);
}
.btn-icon:hover { color: var(--color-indigo); border-color: var(--color-indigo); background: var(--color-lilac); }
.btn-icon .ico { width: 17px; height: 17px; }

/* ---------------- Console panel ---------------- */
.console-wrap {
  padding: var(--space-5) var(--space-6) var(--space-6);
  min-height: 0; display: flex; flex-direction: column;
}
.console {
  flex: 1; min-height: 0; display: flex; flex-direction: column;
  background: var(--color-midnight-violet);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}
/* giant outlined SPU mark bleeding off the corner (brand §20) */
.console .brand-mark {
  position: absolute; right: -90px; bottom: -120px; width: 420px; height: 420px;
  color: #fff; opacity: 0.04; pointer-events: none; z-index: 0;
}
.console .brand-mark svg { width: 100%; height: 100%; }

.console-bar {
  display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap;
  padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,0.1);
  position: relative; z-index: 1;
}
.console-bar .title {
  font-size: 11px; letter-spacing: var(--tracking-wider); text-transform: uppercase;
  color: var(--color-lilac); font-weight: var(--weight-medium);
  display: inline-flex; align-items: center; gap: 8px;
}
.console-bar .title .ico { width: 15px; height: 15px; }
.console-bar .spacer { flex: 1; }

/* toggles */
.toggle {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  font-size: var(--text-xs); color: var(--color-lilac); user-select: none;
  padding: 5px 10px; border-radius: var(--radius-pill); border: 1px solid transparent;
  transition: all var(--duration-fast) var(--ease-out);
}
.toggle:hover { background: rgba(255,255,255,0.06); }
.toggle input { display: none; }
.toggle .sw { width: 30px; height: 17px; border-radius: 999px; background: rgba(255,255,255,0.18); position: relative; transition: background var(--duration-base) var(--ease-out); flex: none; }
.toggle .sw::after { content: ""; position: absolute; top: 2px; left: 2px; width: 13px; height: 13px; border-radius: 50%; background: #fff; transition: transform var(--duration-base) var(--ease-out); }
.toggle input:checked + .sw { background: var(--color-violet); }
.toggle input:checked + .sw::after { transform: translateX(13px); }
.console-bar .btn-icon { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.14); color: var(--color-lilac); }
.console-bar .btn-icon:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.3); color: #fff; }

/* output */
.console-out {
  flex: 1; min-height: 0; overflow-y: auto; overflow-x: hidden;
  padding: 14px 16px; position: relative; z-index: 1;
  font-family: var(--font-mono); font-size: 13px; line-height: 1.55;
  scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.25) transparent;
}
.console-out::-webkit-scrollbar { width: 10px; }
.console-out::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.18); border-radius: 999px; border: 3px solid transparent; background-clip: padding-box; }

.line {
  display: flex; gap: 12px; padding: 1px 0;
  white-space: pre-wrap; word-break: break-word;
  animation: lineIn var(--duration-fast) var(--ease-out);
}
@keyframes lineIn { from { opacity: 0; } to { opacity: 1; } }
.line .ts { color: rgba(232,218,255,0.4); flex: none; font-variant-numeric: tabular-nums; }
.line .arrow { flex: none; width: 14px; text-align: center; font-weight: 700; }
.line .txt { flex: 1; min-width: 0; }
.line.rx .arrow { color: var(--color-flow); }
.line.rx .txt { color: #ECECF6; }
.line.tx .arrow { color: var(--color-spark); }
.line.tx .txt { color: #FFC9A8; }
.line.sys { color: var(--color-purple); font-style: italic; }
.line.sys .txt { color: var(--color-purple); }
.line.err .txt { color: #ff9b8a; }
.line .hexdump { color: #cdbff0; }

.console-empty {
  height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px; color: rgba(232,218,255,0.5); text-align: center; padding: 24px;
}
.console-empty .ico { width: 46px; height: 46px; color: var(--color-purple); opacity: 0.8; }
.console-empty .big { font-size: var(--text-md); color: var(--color-lilac); font-family: var(--font-sans); font-weight: var(--weight-medium); }
.console-empty .small { font-size: var(--text-sm); font-family: var(--font-sans); max-width: 380px; line-height: 1.5; }
.console-empty kbd { font-family: var(--font-mono); background: rgba(255,255,255,0.1); padding: 1px 7px; border-radius: 5px; font-size: 12px; }

/* ---------------- Send bar ---------------- */
.send-bar {
  display: flex; gap: var(--space-3); align-items: center;
  padding: 12px 16px; border-top: 1px solid rgba(255,255,255,0.1);
  position: relative; z-index: 1;
}
.send-bar .send-input {
  flex: 1; font-family: var(--font-mono); font-size: 13px;
  padding: 11px 14px; border-radius: var(--radius-md);
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.14);
  color: #fff; transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
}
.send-bar .send-input::placeholder { color: rgba(232,218,255,0.4); }
.send-bar .send-input:focus { outline: none; border-color: var(--color-violet); box-shadow: 0 0 0 3px rgba(120,66,238,0.3); }
.send-bar .send-input:disabled { opacity: 0.5; cursor: not-allowed; }
.send-bar .le-select {
  font-family: var(--font-mono); font-size: 12px; color: var(--color-lilac);
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius-md); padding: 11px 10px;
}
.send-bar .le-select:disabled { opacity: 0.5; }
.send-bar .btn-send {
  background: var(--color-violet); color: #fff; border: none;
}
.send-bar .btn-send:not(:disabled):hover { background: var(--color-purple); color: var(--color-midnight-violet); }
.send-bar .hexmode-tag {
  font-size: 10px; letter-spacing: var(--tracking-wide); text-transform: uppercase;
  color: var(--color-spark); font-weight: var(--weight-bold);
  border: 1px solid rgba(249,128,61,0.5); border-radius: var(--radius-sm); padding: 3px 7px;
}

/* ---------------- Banners ---------------- */
.banner {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px 18px; border-radius: var(--radius-lg); margin: 0;
  font-size: var(--text-sm); line-height: 1.5;
}
.banner .ico { width: 20px; height: 20px; flex: none; margin-top: 1px; }
.banner.warn { background: rgba(249,128,61,0.1); border: 1px solid rgba(249,128,61,0.4); color: #8a3d22; }
.banner.warn .ico { color: var(--color-spark); }
.banner b { font-weight: var(--weight-bold); }
.banner code { background: rgba(31,12,81,0.08); padding: 1px 6px; border-radius: 5px; }

.unsupported-screen {
  height: 100%; display: flex; align-items: center; justify-content: center; padding: 40px;
}
.unsupported-card {
  max-width: 540px; background: var(--color-white); border: 1px solid var(--border);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); padding: var(--space-7);
  text-align: center;
}
.unsupported-card .ico { width: 52px; height: 52px; color: var(--color-spark); margin-bottom: 12px; }
.unsupported-card h2 { margin: 0 0 10px; font-weight: var(--weight-medium); font-size: var(--text-2xl); letter-spacing: var(--tracking-tight); }
.unsupported-card p { margin: 0 0 8px; color: var(--fg-muted); }
.unsupported-card code { background: var(--bg-subtle); padding: 2px 8px; border-radius: 6px; font-family: var(--font-mono); }

/* ---------------- Tab bar ---------------- */
.tab-bar {
  display: flex; align-items: center; gap: var(--space-2);
  padding: 0 var(--space-6);
  background: var(--color-white);
  border-bottom: 1px solid var(--border);
}
.tab-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: inherit; font-size: var(--text-sm); font-weight: var(--weight-medium);
  color: var(--fg-muted); background: transparent; border: none;
  padding: 13px 16px; cursor: pointer;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: color var(--duration-fast) var(--ease-out), border-color var(--duration-fast);
}
.tab-btn .ico { width: 15px; height: 15px; }
.tab-btn:hover { color: var(--color-indigo); }
.tab-btn--active { color: var(--color-indigo); border-bottom-color: var(--color-indigo); }

/* tab content area fills the remaining height */
.tab-content { min-height: 0; display: flex; flex-direction: column; overflow: hidden; }
.console-wrap { flex: 1; min-height: 0; padding: var(--space-5) var(--space-6) var(--space-6); }
.fm-tab-wrap  { flex: 1; min-height: 0; overflow-y: auto; }

/* ---------------- File Manager ---------------- */
.fm-wrap {
  padding: var(--space-5) var(--space-6) var(--space-7);
  display: flex; flex-direction: column; gap: var(--space-5);
  max-width: 1200px;
}

/* Status card */
.fm-status-card {
  background: var(--color-white); border: 1px solid var(--border);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-sm);
  padding: var(--space-5) var(--space-6);
  display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-5);
}
.fm-status-fields { display: flex; gap: var(--space-6); flex-wrap: wrap; flex: 1; }
.fm-field { display: flex; flex-direction: column; gap: 4px; min-width: 120px; }
.fm-label {
  font-size: 11px; letter-spacing: var(--tracking-wider); text-transform: uppercase;
  color: var(--fg-muted); font-weight: var(--weight-medium);
}
.fm-value {
  font-size: var(--text-sm); font-weight: var(--weight-medium); color: var(--fg);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 200px;
}
.fm-value.mono { font-family: var(--font-mono); }
.fm-status-actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }

/* Two-column grid for upload + file list */
.fm-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); align-items: start;
}
@media (max-width: 820px) { .fm-grid { grid-template-columns: 1fr; } }

/* Panel card */
.fm-panel {
  background: var(--color-white); border: 1px solid var(--border);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-sm);
  padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-4);
}
.fm-panel-title {
  display: flex; align-items: center; gap: 8px;
  font-size: var(--text-sm); font-weight: var(--weight-bold);
  color: var(--fg); letter-spacing: var(--tracking-tight);
  padding-bottom: var(--space-3); border-bottom: 1px solid var(--border);
}

/* Drop zone */
.fm-dropzone {
  border: 2px dashed var(--border-strong); border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-5); text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  cursor: pointer; transition: all var(--duration-base) var(--ease-out);
  background: var(--bg-subtle);
}
.fm-dropzone:hover, .fm-dropzone--over {
  border-color: var(--color-indigo); background: var(--color-lilac);
}
.fm-dropzone--disabled { pointer-events: none; opacity: 0.5; }
.fm-dropzone-title { font-weight: var(--weight-medium); font-size: var(--text-sm); color: var(--fg); }
.fm-dropzone-hint  { font-size: var(--text-xs); color: var(--fg-subtle); }

/* Queued file preview */
.fm-queued-file {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 12px 14px; border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg); background: var(--bg-subtle);
}

/* Upload progress */
.fm-upload-progress {
  border: 1px solid rgba(249,128,61,0.35); border-radius: var(--radius-lg);
  background: rgba(249,128,61,0.06); padding: 14px 16px;
  display: flex; flex-direction: column; gap: 8px;
}
.fm-up-header { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.fm-up-name   { font-weight: var(--weight-medium); font-size: var(--text-sm); color: var(--fg); flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fm-up-stats  { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--fg-muted); white-space: nowrap; }
.fm-up-cancel { background: transparent; border: none; cursor: pointer; color: var(--fg-muted); padding: 4px; border-radius: var(--radius-sm); display: flex; }
.fm-up-cancel:hover { color: var(--color-spark); }
.fm-up-sub    { font-size: var(--text-xs); color: var(--fg-subtle); font-family: var(--font-mono); }

.fm-progress-track {
  height: 6px; border-radius: 999px; background: rgba(249,128,61,0.18); overflow: hidden;
}
.fm-progress-fill {
  height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, var(--color-indigo), var(--color-spark));
  transition: width 300ms var(--ease-out);
}

/* File list */
.fm-file-list { display: flex; flex-direction: column; gap: 0; }
.fm-file-row {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 4px; border-bottom: 1px solid var(--border);
}
.fm-file-row:last-child { border-bottom: none; }
.fm-file-name  { flex: 1; min-width: 0; font-size: var(--text-sm); font-family: var(--font-mono); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fm-file-badge {
  font-size: 10px; font-weight: var(--weight-bold); letter-spacing: var(--tracking-wide);
  text-transform: uppercase; padding: 2px 7px; border-radius: var(--radius-pill);
  white-space: nowrap; flex-shrink: 0;
}
.fm-file-size  { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--fg-muted); white-space: nowrap; flex-shrink: 0; min-width: 60px; text-align: right; }
.fm-list-empty { font-size: var(--text-sm); color: var(--fg-subtle); padding: var(--space-4) 0; text-align: center; }

/* Banners */
.fm-error-banner, .fm-success-banner {
  display: flex; align-items: center; gap: 10px;
  font-size: var(--text-sm); padding: 10px 14px; border-radius: var(--radius-md);
}
.fm-error-banner   { background: rgba(249,128,61,0.1); border: 1px solid rgba(249,128,61,0.35); color: #7a3322; }
.fm-success-banner { background: rgba(109,229,190,0.12); border: 1px solid rgba(109,229,190,0.4); color: #145c3e; }

/* FM buttons */
.fm-btn {
  font-family: inherit; font-weight: var(--weight-bold); font-size: var(--text-xs);
  padding: 8px 16px; border-radius: var(--radius-pill); border: 1.5px solid transparent;
  cursor: pointer; display: inline-flex; align-items: center; gap: 7px; white-space: nowrap;
  transition: all var(--duration-fast) var(--ease-out);
}
.fm-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.fm-btn-primary { background: var(--color-indigo); color: #fff; border-color: var(--color-indigo); }
.fm-btn-primary:not(:disabled):hover { background: var(--color-midnight-violet); border-color: var(--color-midnight-violet); }
.fm-btn-ghost   { background: transparent; color: var(--fg); border-color: var(--border-strong); }
.fm-btn-ghost:not(:disabled):hover { background: var(--bg-subtle); border-color: var(--border-brand); color: var(--color-indigo); }
.fm-btn-danger  { background: transparent; color: #b23b2e; border-color: rgba(178,59,46,0.45); }
.fm-btn-danger:not(:disabled):hover { background: rgba(249,128,61,0.1); }
.fm-btn-sm { padding: 5px 12px; font-size: 11px; }
.fm-btn-icon {
  background: transparent; border: 1px solid var(--border-strong); border-radius: var(--radius-md);
  color: var(--fg-muted); cursor: pointer; padding: 6px; display: inline-flex;
  transition: all var(--duration-fast) var(--ease-out);
}
.fm-btn-icon:hover { color: #b23b2e; border-color: rgba(178,59,46,0.45); background: rgba(249,128,61,0.06); }
.fm-btn-icon:disabled { opacity: 0.35; cursor: not-allowed; }
.fm-btn-icon--download:hover { color: var(--color-indigo); border-color: rgba(100,130,255,0.45); background: rgba(100,130,255,0.06); }

/* Empty state */
.fm-empty {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; color: var(--fg-subtle); text-align: center; padding: 48px;
}
.fm-empty .ico  { width: 44px; height: 44px; color: var(--color-indigo); opacity: 0.4; }
.fm-empty-title { font-size: var(--text-xl); font-weight: var(--weight-medium); color: var(--fg); font-family: var(--font-sans); }
.fm-empty-sub   { font-size: var(--text-sm); max-width: 380px; }

/* Config Editor */
.cf-wrap {
  padding: var(--space-5) var(--space-6) var(--space-7);
  display: flex; flex-direction: column; gap: var(--space-4);
  max-width: 900px; position: relative;
}

/* File load row */
.cf-dropzone {
  border: 2px dashed var(--border-strong); border-radius: var(--radius-lg);
  padding: var(--space-5); text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  cursor: pointer; transition: all var(--duration-base) var(--ease-out);
  background: var(--bg-subtle);
}
.cf-dropzone:hover, .cf-dropzone--over {
  border-color: var(--color-indigo); background: var(--color-lilac);
}
.cf-dropzone-title { font-weight: var(--weight-medium); font-size: var(--text-sm); color: var(--fg); }
.cf-dropzone-title code { font-family: var(--font-mono); font-size: 12px; background: rgba(80,26,198,0.08); padding: 1px 6px; border-radius: 5px; }
.cf-dropzone-hint  { font-size: var(--text-xs); color: var(--fg-subtle); }

.cf-loaded-file {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px; border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg); background: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.cf-loaded-name { font-family: var(--font-mono); font-size: var(--text-sm); font-weight: var(--weight-medium); color: var(--fg); }
.cf-loaded-hint { font-size: var(--text-xs); color: var(--fg-subtle); margin-top: 3px; }
.cf-icon-btn {
  background: transparent; border: 1px solid var(--border-strong); border-radius: var(--radius-md);
  color: var(--fg-muted); cursor: pointer; padding: 6px; display: inline-flex;
  transition: all var(--duration-fast) var(--ease-out); flex-shrink: 0;
}
.cf-icon-btn:hover { color: var(--color-indigo); border-color: var(--color-indigo); background: var(--color-lilac); }

/* Hint card */
.cf-hint-card {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 13px 16px; border-radius: var(--radius-lg);
  background: rgba(80,26,198,0.05); border: 1px solid rgba(80,26,198,0.18);
  font-size: var(--text-sm); color: var(--fg-muted); line-height: 1.6;
}
.cf-hint-card code { font-family: var(--font-mono); font-size: 12px; background: rgba(80,26,198,0.1); padding: 1px 6px; border-radius: 5px; color: var(--color-indigo); }

/* Banners */
.cf-banner {
  display: flex; align-items: center; gap: 10px;
  font-size: var(--text-sm); padding: 11px 15px; border-radius: var(--radius-md);
  line-height: 1.5;
}
.cf-banner-error   { background: rgba(249,128,61,0.1); border: 1px solid rgba(249,128,61,0.35); color: #7a3322; }
.cf-banner-success { background: rgba(109,229,190,0.12); border: 1px solid rgba(109,229,190,0.4); color: #145c3e; }

/* Upload progress */
.cf-progress-wrap {
  border: 1px solid rgba(80,26,198,0.3); border-radius: var(--radius-lg);
  background: rgba(80,26,198,0.05); padding: 13px 16px;
  display: flex; flex-direction: column; gap: 8px;
}
.cf-progress-header {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  font-size: var(--text-xs); color: var(--fg-muted); font-family: var(--font-mono);
}
.cf-progress-header span:first-child { flex: 1; }
.cf-progress-track { height: 5px; border-radius: 999px; background: rgba(80,26,198,0.15); overflow: hidden; }
.cf-progress-fill  { height: 100%; border-radius: 999px; background: var(--gradient-ultraviolet); transition: width 300ms var(--ease-out); }

/* Form */
.cf-form {
  background: var(--color-white); border: 1px solid var(--border);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-sm); overflow: hidden;
}
.cf-form-header {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 20px; border-bottom: 1px solid var(--border);
  background: var(--bg-subtle);
}
.cf-form-title { font-weight: var(--weight-bold); font-size: var(--text-sm); color: var(--fg); }
.cf-dirty-badge {
  font-size: 10px; font-weight: var(--weight-bold); letter-spacing: var(--tracking-wide);
  text-transform: uppercase; padding: 2px 8px; border-radius: var(--radius-pill);
  background: rgba(249,128,61,0.15); color: var(--color-spark);
  border: 1px solid rgba(249,128,61,0.4);
}

/* Fields grid — 2-col, wide fields span both */
.cf-fields-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  padding: 4px 0;
}
.cf-field {
  display: flex; flex-direction: column; gap: 7px;
  padding: 16px 20px; border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
}
.cf-field:nth-child(even) { border-right: none; }
.cf-field--wide { grid-column: 1 / -1; border-right: none; }

/* Nested object section */
.cf-section {
  grid-column: 1 / -1;
  border-bottom: 1px solid var(--border);
}
.cf-section-title {
  font-size: 11px; letter-spacing: var(--tracking-wider); text-transform: uppercase;
  font-weight: var(--weight-medium); color: var(--fg-muted);
  padding: 10px 20px 6px; background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
}
.cf-section-title-edit {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px; background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
}
.cf-key-input {
  flex: 1; max-width: 320px; font-family: var(--font-mono);
  font-size: var(--text-sm); padding: 6px 10px;
}
.cf-section .cf-fields-grid { padding: 0; }
.cf-section .cf-field:last-child { border-bottom: none; }

.cf-label {
  font-size: 11px; letter-spacing: var(--tracking-wider); text-transform: uppercase;
  font-weight: var(--weight-medium); color: var(--fg-muted);
  display: flex; align-items: center; gap: 7px;
}
.cf-type-hint {
  font-size: 9px; letter-spacing: var(--tracking-wide); text-transform: uppercase;
  color: var(--fg-subtle); font-weight: var(--weight-regular);
  background: var(--bg-subtle); border: 1px solid var(--border);
  padding: 1px 5px; border-radius: var(--radius-sm);
}

/* Inputs */
.cf-input {
  font-family: var(--font-mono); font-size: var(--text-sm); color: var(--fg);
  padding: 9px 12px; border: 1px solid var(--border-strong); border-radius: var(--radius-md);
  background: var(--color-white); width: 100%;
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
}
.cf-input:focus { outline: none; border-color: var(--color-indigo); box-shadow: var(--focus-ring); }
.cf-textarea { font-family: var(--font-mono); font-size: 12px; resize: vertical; line-height: 1.5; }
input[type="number"].cf-input { -moz-appearance: textfield; }
input[type="number"].cf-input::-webkit-inner-spin-button,
input[type="number"].cf-input::-webkit-outer-spin-button { opacity: 1; }

/* File badge */
.cf-file-badge {
  font-size: 10px; font-weight: var(--weight-bold); letter-spacing: var(--tracking-wide);
  text-transform: uppercase; padding: 2px 7px; border-radius: var(--radius-pill);
  white-space: nowrap; flex-shrink: 0;
}
.cf-badge-femto { background: rgba(249,128,61,0.14); color: var(--color-spark);  border: 1px solid rgba(249,128,61,0.4); }
.cf-badge-audio { background: rgba(48,209,255,0.15); color: var(--color-flow);   border: 1px solid rgba(48,209,255,0.35); }

/* Radio buttons */
.cf-radio-group { display: flex; gap: var(--space-4); align-items: center; }
.cf-radio {
  display: inline-flex; align-items: center; gap: 9px;
  cursor: pointer; font-size: var(--text-sm); color: var(--fg);
  font-family: var(--font-sans); user-select: none;
}
.cf-radio input[type="radio"] { display: none; }
.cf-radio-dot {
  width: 18px; height: 18px; border-radius: 50%; flex-shrink: 0;
  border: 2px solid var(--border-strong); background: var(--color-white);
  position: relative; transition: border-color var(--duration-fast), background var(--duration-fast);
}
.cf-radio-dot::after {
  content: ""; position: absolute; inset: 3px; border-radius: 50%;
  background: var(--color-indigo); opacity: 0; transition: opacity var(--duration-fast);
}
.cf-radio input[type="radio"]:checked + .cf-radio-dot {
  border-color: var(--color-indigo);
}
.cf-radio input[type="radio"]:checked + .cf-radio-dot::after { opacity: 1; }
.cf-radio:hover .cf-radio-dot { border-color: var(--color-violet); }

/* Spinner animation */
@keyframes spin { to { transform: rotate(360deg); } }

.cf-loading {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 16px; padding: 80px 40px; color: var(--fg-muted);
}
.cf-loading-text { font-size: var(--text-sm); color: var(--fg-subtle); }

/* Footer */
.cf-footer {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 10;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(12px);
  border-top: 1px solid var(--border); box-shadow: 0 -4px 16px rgba(31,12,81,0.06);
}
.cf-footer-inner {
  max-width: 900px; margin: 0; padding: 14px var(--space-6);
  display: flex; align-items: center; gap: var(--space-5); flex-wrap: wrap;
}
.cf-footer-note {
  display: flex; align-items: center; gap: 8px;
  font-size: var(--text-xs); color: var(--fg-subtle); flex: 1;
}
.cf-footer-actions { display: flex; gap: var(--space-3); margin-left: auto; }

/* ---------------- Audio Panel ---------------- */
.audio-wrap {
  padding: var(--space-5) var(--space-6) var(--space-7);
  display: flex; flex-direction: column; gap: var(--space-4);
  max-width: 1100px;
}

/* Header card */
.audio-header-card {
  background: var(--color-white); border: 1px solid var(--border);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-sm);
  padding: var(--space-4) var(--space-5);
  display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-4);
}
.audio-header-left {
  display: flex; flex-direction: column; gap: 4px; flex: 1;
}
.audio-header-title {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: var(--weight-bold); font-size: var(--text-md); color: var(--fg);
}
.audio-header-title .ico { width: 18px; height: 18px; color: var(--color-indigo); }
.audio-meta {
  font-size: var(--text-xs); color: var(--fg-subtle); font-family: var(--font-mono);
}
.audio-header-actions { display: flex; gap: var(--space-2); align-items: center; flex-wrap: wrap; }

/* Channel grid */
.audio-channels {
  display: flex; gap: var(--space-4); flex-wrap: wrap;
}

/* Individual channel strip */
.audio-channel {
  flex: 1; min-width: 200px; max-width: 360px;
  background: var(--color-white); border: 1px solid var(--border);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-sm);
  padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-3);
  transition: border-color var(--duration-base), box-shadow var(--duration-base);
}
.audio-channel--active {
  border-color: rgba(80,26,198,0.28);
  box-shadow: 0 0 0 1px rgba(80,26,198,0.08), var(--shadow-md);
}
.audio-ch-header { display: flex; flex-direction: column; gap: 3px; }
.audio-ch-name {
  font-weight: var(--weight-bold); font-size: var(--text-md);
  color: var(--fg); letter-spacing: var(--tracking-tight);
}
.audio-ch-desc {
  font-size: var(--text-xs); color: var(--fg-subtle); line-height: 1.4;
}

/* VU meter */
.vu-wrap {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: var(--space-3) 0;
}
.vu-track {
  width: 36px; height: 100px;
  background: var(--bg-subtle); border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); overflow: hidden;
  position: relative; /* bar uses absolute positioning to grow from bottom */
}
.vu-bar {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: var(--color-pulse);
  transition: height 80ms ease-out, background 200ms;
}
.vu-label {
  font-family: var(--font-mono); font-size: 11px; color: var(--fg-subtle);
  letter-spacing: 0; white-space: nowrap;
}

/* Section dividers within each channel */
.audio-section {
  display: flex; flex-direction: column; gap: var(--space-2);
  padding-top: var(--space-3); border-top: 1px solid var(--border);
}
.audio-section-label {
  font-size: 11px; letter-spacing: var(--tracking-wider); text-transform: uppercase;
  color: var(--fg-muted); font-weight: var(--weight-medium);
}
.audio-monitor-lbl { cursor: pointer; }

/* Record bar */
.audio-record-bar {
  background: var(--color-white); border: 1px solid var(--border);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-sm);
  padding: var(--space-4) var(--space-5);
  display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap;
}
.audio-record-routing { display: flex; gap: var(--space-2); flex-wrap: wrap; align-items: center; flex: 1; }
.audio-route-chip {
  display: inline-flex; align-items: center;
  font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--color-indigo); background: var(--color-lilac);
  border: 1px solid var(--border-strong); border-radius: var(--radius-pill);
  padding: 4px 10px;
}
.audio-route-hint { font-size: var(--text-xs); color: var(--fg-subtle); }

/* Record button indicator dot */
.rec-dot {
  display: inline-block; width: 9px; height: 9px; border-radius: 50%;
  background: #fff; margin-right: 4px;
  animation: rec-blink 1s ease-in-out infinite;
}
@keyframes rec-blink { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }

/* Input source + WAV playback control row */
.audio-controls-row {
  display: flex; gap: var(--space-4); flex-wrap: wrap;
}
.audio-ctrl-card {
  flex: 1; min-width: 260px;
  background: var(--color-white); border: 1px solid var(--border);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-sm);
  padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-3);
}
.audio-ctrl-title {
  font-weight: var(--weight-bold); font-size: var(--text-sm); color: var(--fg);
}
.audio-ctrl-title-row {
  display: flex; align-items: center; justify-content: space-between;
}
.audio-ctrl-hint {
  font-size: var(--text-xs); color: var(--fg-subtle); line-height: 1.4; margin-top: 2px;
}
.audio-ctrl-error {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  font-size: var(--text-xs); color: #b23b2e;
  background: rgba(249,128,61,0.08); border: 1px solid rgba(178,59,46,0.3);
  border-radius: var(--radius-md); padding: 6px 10px;
}
.audio-ctrl-dismiss {
  background: none; border: none; cursor: pointer; color: inherit;
  font-size: 12px; padding: 0 2px; flex-shrink: 0;
}
.audio-ctrl-playing {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: var(--text-xs); color: var(--color-indigo); font-weight: var(--weight-medium);
}

/* Input source button grid */
.audio-input-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.audio-input-btn {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-subtle); border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg); padding: 10px 12px;
  cursor: pointer; text-align: left;
  transition: all var(--duration-fast) var(--ease-out);
}
.audio-input-btn:hover:not(:disabled) { border-color: var(--color-indigo); background: var(--color-lilac); }
.audio-input-btn--active {
  border-color: var(--color-indigo); background: var(--color-lilac);
  box-shadow: 0 0 0 2px rgba(80,26,198,0.12);
}
.audio-input-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.audio-input-dot {
  width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0;
  border: 2px solid var(--border-strong);
  transition: border-color var(--duration-fast), background var(--duration-fast);
}
.audio-input-btn--active .audio-input-dot { border-color: var(--color-indigo); background: var(--color-indigo); }
.audio-input-label { font-size: var(--text-xs); font-weight: var(--weight-bold); color: var(--fg); line-height: 1.3; }
.audio-input-desc  { font-size: 11px; color: var(--fg-subtle); margin-top: 1px; line-height: 1.3; }

/* L/R channel toggle */
.audio-input-channel-row {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: var(--space-2); border-top: 1px solid var(--border);
}
.audio-channel-toggle {
  display: flex; border: 1px solid var(--border-strong); border-radius: var(--radius-md); overflow: hidden;
}
.audio-channel-btn {
  font-family: var(--font-mono); font-size: var(--text-xs); font-weight: var(--weight-bold);
  padding: 5px 16px; cursor: pointer; border: none; background: var(--bg-subtle); color: var(--fg-muted);
  transition: all var(--duration-fast) var(--ease-out);
}
.audio-channel-btn + .audio-channel-btn { border-left: 1px solid var(--border-strong); }
.audio-channel-btn:hover:not(:disabled) { background: var(--color-lilac); color: var(--color-indigo); }
.audio-channel-btn--active { background: var(--color-indigo); color: #fff; }
.audio-channel-btn--active:hover:not(:disabled) { background: var(--color-midnight-violet); }
.audio-channel-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* WAV file dropdown */
.audio-wav-select {
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--fg);
  background: var(--bg-subtle); border: 1px solid var(--border-strong);
  border-radius: var(--radius-md); padding: 8px 10px; width: 100%; cursor: pointer;
  transition: border-color var(--duration-fast);
}
.audio-wav-select:focus { outline: none; border-color: var(--color-indigo); }
.audio-wav-select:disabled { opacity: 0.4; cursor: not-allowed; }

/* Spectrogram */
.spectro-wrap {
  background: var(--color-white); border: 1px solid var(--border);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-sm);
  padding: var(--space-4) var(--space-5);
  display: flex; flex-direction: column; gap: var(--space-3);
}
.spectro-header {
  display: flex; align-items: baseline; justify-content: space-between; gap: 8px;
}
.spectro-title {
  font-weight: var(--weight-bold); font-size: var(--text-sm); color: var(--fg);
}
.spectro-freq-range {
  font-family: var(--font-mono); font-size: 11px; color: var(--fg-subtle); white-space: nowrap;
}
.spectro-canvas-wrap {
  position: relative;
  background: #0a0814; border-radius: var(--radius-md); overflow: hidden; line-height: 0;
}
.spectro-freq-axis {
  position: absolute; inset: 0; pointer-events: none; overflow: hidden;
}
.spectro-freq-label {
  position: absolute; left: 0; right: 0; height: 0;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.spectro-freq-label span {
  position: absolute; top: 2px; left: 5px;
  font: 9px/1 var(--font-mono); color: rgba(255,255,255,0.75);
  text-shadow: 0 0 4px #000, 0 0 2px #000;
  white-space: nowrap;
}
.spectro-canvas {
  width: 100%; height: 200px; display: block; image-rendering: pixelated;
}
.spectro-empty {
  height: 200px; display: flex; align-items: center; justify-content: center;
  background: #0a0814; border-radius: var(--radius-md);
  font-size: var(--text-xs); color: rgba(255,255,255,0.25); font-style: italic;
}
.spectro-controls {
  display: flex; gap: var(--space-4); flex-wrap: wrap; align-items: flex-end;
}
.spectro-ctrl-group {
  display: flex; flex-direction: column; gap: 5px;
}
.spectro-ctrl-group--wide { flex: 1; min-width: 160px; }
.spectro-ctrl-label {
  font-size: 11px; letter-spacing: var(--tracking-wider); text-transform: uppercase;
  color: var(--fg-muted); font-weight: var(--weight-medium);
}
.spectro-select {
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--fg);
  background: var(--bg-subtle); border: 1px solid var(--border-strong);
  border-radius: var(--radius-md); padding: 6px 8px; cursor: pointer;
}
.spectro-select:focus { outline: none; border-color: var(--color-indigo); }
.spectro-slider {
  width: 100%; cursor: pointer; accent-color: var(--color-indigo);
  margin: 2px 0;
}
.spectro-freq-input {
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--fg);
  background: var(--bg-subtle); border: 1px solid var(--border-strong);
  border-radius: var(--radius-md); padding: 6px 8px; width: 78px;
}
.spectro-freq-input:focus { outline: none; border-color: var(--color-indigo); }

/* known-ports quick reconnect chips */
.known-ports { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.chip {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-indigo);
  background: var(--color-lilac); border: 1px solid var(--border-strong); border-radius: var(--radius-pill);
  padding: 6px 12px; transition: all var(--duration-fast) var(--ease-out);
}
.chip:hover { background: #fff; border-color: var(--color-indigo); }
.chip .ico { width: 13px; height: 13px; }