/* ==========================================================
   SIGNAL — design tokens
   Palette: near-black studio background, tally-light red for
   the primary accent, on-air teal for "good" states, amber for
   caution. Display type is a squared-off grotesk (console
   nameplates); numbers run in a monospace built for readouts.
   ========================================================== */

.ytk-wrap {
  --bg: #101218;
  --panel: #171A21;
  --panel-2: #1D2129;
  --border: #262B35;
  --border-soft: #1F232C;
  --text: #ECEEF2;
  --text-muted: #8B92A3;
  --text-dim: #5B6272;

  --accent: #FF4B3E;      /* tally red */
  --accent-dim: #7A2822;
  --good: #2FE6B8;        /* on-air teal */
  --good-dim: #14453C;
  --warn: #F5B942;
  --warn-dim: #4A3A17;
  --bad: #FF6767;
  --bad-dim: #4A2020;

  --font-display: 'Space Grotesk', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;

  --radius: 10px;
  --radius-sm: 6px;
}

.ytk-wrap * { box-sizing: border-box; }
.ytk-wrap { margin: 0; padding: 0; }

.ytk-wrap {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.ytk-wrap button, .ytk-wrap input, .ytk-wrap select, .ytk-wrap textarea { font-family: inherit; font-size: inherit; color: inherit; }
.ytk-wrap button { cursor: pointer; }
.ytk-wrap :focus-visible { outline: 2px solid var(--good); outline-offset: 2px; }

/* ---------------- Layout ---------------- */

.ytk-wrap .app {
  display: grid;
  grid-template-columns: 272px 1fr;
  height: 760px;
  max-height: 85vh;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}

.ytk-wrap .sidebar {
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
}

.ytk-wrap .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 22px 20px;
  border-bottom: 1px solid var(--border-soft);
}

.ytk-wrap .brand-mark {
  display: flex;
  gap: 3px;
  align-items: flex-end;
  height: 22px;
}
.ytk-wrap .brand-mark i {
  display: block;
  width: 5px;
  background: var(--accent);
  border-radius: 1px;
}
.ytk-wrap .brand-mark i:nth-child(1) { height: 10px; }
.ytk-wrap .brand-mark i:nth-child(2) { height: 22px; background: var(--good); }
.ytk-wrap .brand-mark i:nth-child(3) { height: 15px; background: var(--warn); }

.ytk-wrap .brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.ytk-wrap .brand-name { font-family: var(--font-display); font-weight: 700; font-size: 19px; letter-spacing: 0.3px; }
.ytk-wrap .brand-sub { font-size: 11px; color: var(--text-muted); letter-spacing: 0.4px; text-transform: uppercase; }

.ytk-wrap #ytk-nav { padding: 14px 12px; flex: 1; }

.ytk-wrap .nav-home {
  width: 100%;
  text-align: left;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 13.5px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.ytk-wrap .nav-home .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 6px var(--accent); }
.ytk-wrap .nav-home:hover { border-color: var(--good); }

.ytk-wrap .nav-group { margin-bottom: 18px; }
.ytk-wrap .nav-heading {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-dim);
  padding: 0 10px 6px;
  font-weight: 600;
}
.ytk-wrap .nav-link {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  border-left: 2px solid transparent;
  color: var(--text-muted);
  padding: 7px 10px;
  border-radius: 4px;
  font-size: 13px;
}
.ytk-wrap .nav-link:hover { color: var(--text); background: var(--panel-2); }
.ytk-wrap .nav-link.active { color: var(--good); border-left-color: var(--good); background: var(--panel-2); font-weight: 500; }

.ytk-wrap .sidebar-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border-soft);
  font-size: 11px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 7px;
}
.ytk-wrap .rec-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--good); box-shadow: 0 0 6px var(--good); flex-shrink: 0; }

.ytk-wrap .main { min-width: 0; height: 100%; display: flex; flex-direction: column; }

.ytk-wrap .topbar {
  flex-shrink: 0;
  z-index: 5;
  background: rgba(16,18,24,0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-soft);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.ytk-wrap .topbar h2 { font-family: var(--font-display); font-size: 16px; margin: 0; font-weight: 600; color: var(--text-muted); }
.ytk-wrap #ytk-searchInput {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 16px;
  width: 260px;
  color: var(--text);
}
.ytk-wrap #ytk-searchInput::placeholder { color: var(--text-dim); }
.ytk-wrap #ytk-searchInput:focus { border-color: var(--good); }

.ytk-wrap .content { padding: 32px; max-width: 1100px; overflow-y: auto; flex: 1; }

/* ---------------- Home ---------------- */

.ytk-wrap .hero {
  padding: 34px 0 30px;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 30px;
}
.ytk-wrap .hero-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--accent);
  margin-bottom: 14px;
}
.ytk-wrap .hero h1 {
  font-family: var(--font-display);
  font-size: 36px;
  line-height: 1.15;
  margin: 0 0 12px;
  max-width: 640px;
}
.ytk-wrap .hero p { color: var(--text-muted); max-width: 560px; margin: 0; }

.ytk-wrap .cat-section { margin-bottom: 34px; }
.ytk-wrap .cat-section h2 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.ytk-wrap .cat-section .count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  background: var(--panel-2);
  border: 1px solid var(--border);
  padding: 1px 7px;
  border-radius: 10px;
}

.ytk-wrap .tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.ytk-wrap .tool-card {
  text-align: left;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: border-color .15s, transform .15s;
}
.ytk-wrap .tool-card:hover { border-color: var(--good); transform: translateY(-1px); }
.ytk-wrap .tool-card h3 { font-family: var(--font-display); font-size: 14.5px; margin: 0 0 6px; font-weight: 600; }
.ytk-wrap .tool-card p { font-size: 12.5px; color: var(--text-muted); margin: 0; line-height: 1.45; }

.ytk-wrap .empty-state { color: var(--text-dim); padding: 40px 0; text-align: center; }

/* ---------------- Tool page ---------------- */

.ytk-wrap .tool-page { padding-bottom: 40px; }
.ytk-wrap .tool-head { margin-bottom: 24px; }
.ytk-wrap .back-btn {
  background: none; border: none; color: var(--text-muted);
  font-size: 12.5px; padding: 0; margin-bottom: 14px;
}
.ytk-wrap .back-btn:hover { color: var(--good); }
.ytk-wrap .crumb {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
.ytk-wrap .tool-head h1 { font-family: var(--font-display); font-size: 26px; margin: 4px 0 8px; }
.ytk-wrap .tool-head p { color: var(--text-muted); max-width: 620px; margin: 0; }

.ytk-wrap .tool-grid-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }

.ytk-wrap .panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}

.ytk-wrap .result-placeholder { color: var(--text-dim); font-size: 13.5px; padding: 20px 0; }

/* ---------------- Forms ---------------- */

.ytk-wrap .field { margin-bottom: 16px; }
.ytk-wrap .field label { display: block; font-size: 12.5px; color: var(--text-muted); margin-bottom: 6px; font-weight: 500; }
.ytk-wrap .field input, .ytk-wrap .field select, .ytk-wrap .field textarea {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
  color: var(--text);
}
.ytk-wrap .field input:focus, .ytk-wrap .field select:focus, .ytk-wrap .field textarea:focus { border-color: var(--good); }
.ytk-wrap .field textarea { resize: vertical; }

.ytk-wrap .form-actions { display: flex; gap: 10px; margin-top: 4px; flex-wrap: wrap; }

.ytk-wrap .btn {
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid transparent;
}
.ytk-wrap .btn.primary { background: var(--accent); color: #1a0b09; border-color: var(--accent); }
.ytk-wrap .btn.primary:hover { filter: brightness(1.08); }
.ytk-wrap .btn.ghost { background: transparent; border-color: var(--border); color: var(--text-muted); }
.ytk-wrap .btn.ghost:hover { color: var(--text); border-color: var(--text-dim); }
.ytk-wrap .btn.tiny { padding: 4px 10px; font-size: 11.5px; }
.ytk-wrap .btn.copied { background: var(--good); border-color: var(--good); color: #05201b; }

.ytk-wrap .error-box {
  background: var(--bad-dim);
  border: 1px solid var(--bad);
  color: #ffd6d6;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

/* ---------------- Result sections ---------------- */

.ytk-wrap .result-section { margin-bottom: 20px; }
.ytk-wrap .result-section:last-child { margin-bottom: 0; }

.ytk-wrap .stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; }
.ytk-wrap .stat-cell {
  background: var(--panel-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}
.ytk-wrap .stat-value { font-family: var(--font-mono); font-size: 19px; font-weight: 600; color: var(--good); }
.ytk-wrap .stat-label { font-size: 11px; color: var(--text-muted); margin-top: 4px; }

.ytk-wrap .text-box h4 { margin: 0 0 6px; font-size: 12.5px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.4px; }
.ytk-wrap .text-box p { margin: 0; font-size: 14px; }

.ytk-wrap .notes-box { display: grid; gap: 14px; }
.ytk-wrap .notes-group h4 { margin: 0 0 8px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.4px; }
.ytk-wrap .notes-group.tone-good h4 { color: var(--good); }
.ytk-wrap .notes-group.tone-warn h4 { color: var(--warn); }
.ytk-wrap .notes-group.tone-bad h4 { color: var(--bad); }
.ytk-wrap .notes-group ul { margin: 0; padding-left: 18px; }
.ytk-wrap .notes-group li { font-size: 13.5px; margin-bottom: 4px; color: var(--text); }

.ytk-wrap .lists-box { display: grid; gap: 18px; }
.ytk-wrap .list-block-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.ytk-wrap .list-block-header h4 { margin: 0; font-size: 13px; color: var(--text-muted); }
.ytk-wrap .copy-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.ytk-wrap .copy-list li {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  background: var(--panel-2); border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm); padding: 9px 10px 9px 12px;
}
.ytk-wrap .copy-list li span { font-size: 13.5px; word-break: break-word; white-space: pre-line; }

.ytk-wrap .table-wrap { overflow-x: auto; }
.ytk-wrap .table-wrap .btn { margin-bottom: 10px; }
.ytk-wrap table { width: 100%; border-collapse: collapse; font-size: 13px; }
.ytk-wrap th, .ytk-wrap td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border-soft); }
.ytk-wrap th { color: var(--text-muted); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.3px; }

/* ---------------- Gauge ---------------- */

.ytk-wrap .score-box { display: flex; flex-direction: column; align-items: center; padding: 6px 0 4px; }
.ytk-wrap .gauge { display: flex; flex-direction: column; align-items: center; width: 100%; max-width: 260px; }
.ytk-wrap .gauge-svg { width: 100%; }
.ytk-wrap .gauge-track { fill: none; stroke: var(--border); stroke-width: 10; stroke-linecap: round; }
.ytk-wrap .gauge-fill { fill: none; stroke-width: 10; stroke-linecap: round; }
.ytk-wrap .gauge.tone-good .gauge-fill { stroke: var(--good); }
.ytk-wrap .gauge.tone-warn .gauge-fill { stroke: var(--warn); }
.ytk-wrap .gauge.tone-bad .gauge-fill { stroke: var(--bad); }
.ytk-wrap .gauge-tick { stroke: var(--text-dim); stroke-width: 1.5; }
.ytk-wrap .gauge-readout { margin-top: -30px; font-family: var(--font-mono); }
.ytk-wrap .gauge-value { font-size: 30px; font-weight: 600; }
.ytk-wrap .gauge-max { font-size: 14px; color: var(--text-dim); }
.ytk-wrap .gauge-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.4px; }

/* ---------------- Image picker ---------------- */

.ytk-wrap .image-picker input[type="file"] {
  width: 100%; background: var(--panel-2); border: 1px dashed var(--border);
  border-radius: var(--radius-sm); padding: 20px 14px; color: var(--text-muted);
}
.ytk-wrap .picker-hint { font-size: 11.5px; color: var(--text-dim); margin: 10px 0 0; }
.ytk-wrap .picker-preview { margin-top: 14px; max-width: 100%; border-radius: var(--radius-sm); border: 1px solid var(--border); display: none; }

/* ---------------- Chapter builder ---------------- */

.ytk-wrap .chapter-rows { display: grid; gap: 8px; margin-bottom: 12px; }
.ytk-wrap .chapter-row { display: grid; grid-template-columns: 90px 1fr 32px; gap: 8px; align-items: center; }
.ytk-wrap .chapter-time, .ytk-wrap .chapter-title {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 8px 10px; color: var(--text); font-family: var(--font-mono); font-size: 13px;
}
.ytk-wrap .chapter-title { font-family: var(--font-body); }
.ytk-wrap .chapter-builder .btn.ghost { margin-bottom: 16px; }

/* ---------------- Checklist ---------------- */

.ytk-wrap .checklist { display: grid; gap: 4px; }
.ytk-wrap .checklist-row {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px; border-radius: var(--radius-sm);
  font-size: 13.5px;
}
.ytk-wrap .checklist-row:hover { background: var(--panel-2); }
.ytk-wrap .checklist-row input { width: 16px; height: 16px; accent-color: var(--good); }

/* ---------------- Responsive ---------------- */

@media (max-width: 880px) {
  .ytk-wrap .app { grid-template-columns: 1fr; height: auto; max-height: none; }
  .ytk-wrap .sidebar { position: static; height: auto; max-height: 240px; }
  .ytk-wrap .tool-grid-2col { grid-template-columns: 1fr; }
  .ytk-wrap .content { padding: 20px; }
  .ytk-wrap .topbar { padding: 14px 20px; flex-wrap: wrap; }
  .ytk-wrap #ytk-searchInput { width: 100%; order: 3; }
  .ytk-wrap .hero h1 { font-size: 27px; }
}