:root {
  --bg: #0f172a;
  --panel: #111827;
  --panel-2: #1f2937;
  --line: rgba(255,255,255,0.08);
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #22c55e;
  --accent-2: #38bdf8;
  --danger: #fb7185;
  --input: #0b1220;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, Segoe UI, Arial, sans-serif;
}
body {
  overflow: hidden;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(340px, 460px) minmax(0, 1fr);
  height: 100vh;
  height: 100svh;
  overflow: hidden;
}
.sidebar {
  height: 100vh;
  height: 100svh;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 18px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0));
}
.brand-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.brand h1 { margin: 0 0 6px; font-size: 1.45rem; }
.brand p { margin: 0 0 18px; color: var(--muted); line-height: 1.5; font-size: 0.95rem; }
.device-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.24);
  background: rgba(56, 189, 248, 0.08);
  color: #bae6fd;
  font-size: 0.76rem;
  font-weight: 600;
  white-space: nowrap;
}
.panel {
  background: rgba(17,24,39,0.88);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  margin-bottom: 14px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.18);
  scroll-margin-top: 92px;
}
.panel h2, .panel h3 { margin: 0 0 12px; }
.panel.note p { margin: 0; color: var(--muted); line-height: 1.55; }
.subsection {
  margin-top: 14px;
  border-top: 1px dashed var(--line);
  padding-top: 14px;
}
.subsection-head, .panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.form-grid label, .switch-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--muted);
  min-width: 0;
}
input, select, button {
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--input);
  color: var(--text);
  padding: 10px 12px;
  font-size: 0.95rem;
  min-height: 44px;
}
input, select {
  width: 100%;
}
input[type="checkbox"] {
  width: 20px;
  height: 20px;
  min-height: 20px;
  accent-color: var(--accent);
}
.switch-row {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}
.btn, .view-btn {
  cursor: pointer;
  transition: 0.18s ease;
  touch-action: manipulation;
}
.btn:hover, .view-btn:hover {
  transform: translateY(-1px);
  border-color: rgba(255,255,255,0.18);
}
.btn.primary {
  background: linear-gradient(135deg, var(--accent), #16a34a);
  color: #04130a;
  font-weight: 700;
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.compact-actions button { width: 100%; }

.summary {
  display: grid;
  gap: 10px;
}
.summary-item {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255,255,255,0.02);
}
.summary-item span {
  color: var(--muted);
  min-width: 0;
}
.summary-item strong {
  text-align: right;
  word-break: break-word;
}

.viewer-wrap {
  position: relative;
  min-width: 0;
  height: 100vh;
  height: 100svh;
  min-height: 100vh;
  min-height: 100svh;
  overflow: hidden;
}
.viewer-toolbar {
  position: absolute;
  top: 16px;
  left: 16px;
  right: 16px;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(15, 23, 42, 0.68);
  backdrop-filter: blur(10px);
}
.viewer-heading {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  flex-wrap: wrap;
}
.viewer-toolbar strong { font-size: 1rem; }
.viewer-toolbar span { color: var(--muted); }
.toolbar-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.view-btn {
  border-radius: 10px;
  padding: 9px 12px;
  background: rgba(255,255,255,0.04);
  min-width: 68px;
}
#viewer {
  width: 100%;
  height: 100%;
  min-height: 420px;
  position: relative;
}
#viewer canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}
.hidden { display: none !important; }

.bom-preview .summary-item { font-size: 0.88rem; }
.panel h2 { font-size: 1.25rem; }
label input[readonly] { opacity: 0.85; }

@media (max-width: 1360px) {
  .app-shell {
    grid-template-columns: minmax(320px, 410px) minmax(0, 1fr);
  }
}

@media (max-width: 1100px) {
  .app-shell {
    grid-template-columns: minmax(300px, 380px) minmax(0, 1fr);
  }
  .viewer-toolbar span {
    display: none;
  }
}

@media (max-width: 980px) {
  body { overflow: auto; }

  .app-shell {
    grid-template-columns: 1fr;
    height: auto;
    min-height: auto;
    overflow: visible;
  }

  .viewer-wrap {
    order: -1;
    min-height: auto;
    height: min(62svh, 620px);
    border-bottom: 1px solid var(--line);
  }

  .sidebar {
    height: auto;
    border-right: none;
    padding: 14px;
    overflow: visible;
  }

  .viewer-toolbar {
    top: 12px;
    left: 12px;
    right: 12px;
  }

  #viewer {
    min-height: 360px;
  }
}

@media (max-width: 760px) {
  .form-grid,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .summary-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .summary-item strong {
    text-align: left;
  }

  .viewer-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .viewer-heading {
    justify-content: flex-start;
  }

  .toolbar-actions {
    width: 100%;
    justify-content: stretch;
  }

  .toolbar-actions .view-btn {
    flex: 1 1 0;
  }
}

@media (max-width: 560px) {
  .sidebar {
    padding: 12px;
  }

  .panel {
    padding: 12px;
    border-radius: 14px;
  }

  .brand h1 {
    font-size: 1.2rem;
  }

  .brand p {
    font-size: 0.9rem;
  }

  .device-badge {
    font-size: 0.72rem;
    width: 100%;
    justify-content: center;
  }

  input, select, button {
    font-size: 0.92rem;
    min-height: 46px;
  }

  .viewer-wrap {
    height: min(56svh, 520px);
  }

  #viewer {
    min-height: 300px;
  }
}

@media (max-width: 420px) {
  .viewer-toolbar {
    padding: 10px;
  }

  .view-btn {
    min-width: 0;
    padding: 9px 10px;
  }

  .panel h2 {
    font-size: 1.08rem;
  }
}

@media (pointer: coarse) {
  input, select, button {
    min-height: 46px;
  }

  .view-btn {
    min-height: 44px;
  }
}