/* =============================================================
   SMT Stencil Aperture Validator — IPC-7525B/C
   Custom styles (Tailwind CDN provides base utility classes)
   ============================================================= */

:root {
  --bg-primary: #f1f5f9;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e2e8f0;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --border-color: #cbd5e1;
  --accent: #2563eb;
  --pass-color: #16a34a;
  --warn-color: #d97706;
  --fail-color: #dc2626;
  --table-hover: #f8fafc;
}

.dark {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --border-color: #475569;
  --accent: #3b82f6;
  --pass-color: #22c55e;
  --warn-color: #f59e0b;
  --fail-color: #ef4444;
  --table-hover: #1e293b;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: background .2s, color .2s;
  min-height: 100vh;
  padding-bottom: 2rem;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }

/* Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: .75rem;
  padding: 1.25rem;
  transition: background .2s, border-color .2s;
}

/* Badges */
.badge-pass {
  background: rgba(22,163,74,.12); color: var(--pass-color);
  font-weight: 600; font-size: .75rem; padding: 2px 10px; border-radius: 999px;
  display: inline-block;
}
.badge-warn {
  background: rgba(217,119,6,.12); color: var(--warn-color);
  font-weight: 600; font-size: .75rem; padding: 2px 10px; border-radius: 999px;
  display: inline-block;
}
.badge-fail {
  background: rgba(220,38,38,.12); color: var(--fail-color);
  font-weight: 600; font-size: .75rem; padding: 2px 10px; border-radius: 999px;
  display: inline-block;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .45rem 1rem; border-radius: .5rem; font-size: .85rem;
  font-weight: 500; cursor: pointer; border: 1px solid var(--border-color);
  background: var(--bg-secondary); color: var(--text-primary);
  transition: all .15s;
}
.btn:hover { opacity: .85; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { filter: brightness(1.1); }
.btn-sm { padding: .3rem .7rem; font-size: .78rem; }

/* Form controls */
input, select, textarea {
  background: var(--bg-primary); color: var(--text-primary);
  border: 1px solid var(--border-color); border-radius: .375rem;
  padding: .45rem .65rem; padding-left: calc(.65rem + 10px);
  font-size: .85rem; transition: border-color .15s;
  width: 100%;
}
select { 
  font-size: .72rem; min-width: 160px;
  appearance: none; -webkit-appearance: none; -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%2394a3b8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right .4rem center; background-size: .55rem;
  padding: .45rem 0;
}
#techSelect, #displayUnitSelect { min-width: 260px; }
#thicknessUnit { min-width: auto; width: 100px; }
.expr-comp, .expr-w, .expr-l, .expr-d { text-align: center; }
.expr-shape { text-align: center; text-align-last: center; }

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none; margin: 0;
}
input[type="number"] { -moz-appearance: textfield; }
#settingsPanel input, #settingsPanel select { text-align: center; }
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 2px rgba(37,99,235,.2);
}

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: .82rem; }
th {
  background: var(--bg-tertiary); color: var(--text-secondary);
  text-align: left; padding: .55rem .6rem; font-weight: 600;
  border-bottom: 2px solid var(--border-color); white-space: nowrap;
}
td { padding: .5rem .6rem; border-bottom: 1px solid var(--border-color); }
tr:hover td { background: var(--table-hover); }
tr.selected td { background: rgba(37,99,235,.08); }

/* Tab buttons */
.tab-btn {
  padding: .55rem 1.2rem; font-size: .88rem; font-weight: 500;
  cursor: pointer; border: none; background: transparent;
  color: var(--text-secondary); border-bottom: 2px solid transparent;
  transition: all .15s;
}
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-btn:hover { color: var(--text-primary); }

/* Toggle switch */
.toggle-switch {
  position: relative; width: 44px; height: 24px; display: inline-block;
  cursor: pointer;
}
.toggle-switch input { display: none; }
.toggle-slider {
  position: absolute; inset: 0; background: var(--bg-tertiary);
  border-radius: 12px; transition: .2s;
}
.toggle-slider::before {
  content: ''; position: absolute; left: 3px; top: 3px;
  width: 18px; height: 18px; background: #fff; border-radius: 50%;
  transition: .2s;
}
.toggle-switch input:checked + .toggle-slider { background: var(--accent); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(20px); }

/* Preset buttons */
.preset-btn {
  padding: .25rem .65rem; font-size: .78rem; border-radius: .375rem;
  border: 1px solid var(--border-color); cursor: pointer;
  background: var(--bg-primary); color: var(--text-primary);
  transition: all .12s;
}
.preset-btn:hover, .preset-btn.active {
  border-color: var(--accent); color: var(--accent);
  background: rgba(37,99,235,.08);
}

/* Print */
@media print {
  .no-print { display: none !important; }
  body { background: #fff !important; color: #000 !important; }
  .card { border: 1px solid #ccc !important; break-inside: avoid; }
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn .2s ease-out; }

/* Tooltip */
.tooltip { position: relative; }
.tooltip:hover::after {
  content: attr(data-tip);
  position: absolute; bottom: calc(100% + 4px); left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary); color: var(--bg-primary);
  font-size: .7rem; padding: 3px 8px; border-radius: 4px;
  white-space: nowrap; z-index: 10;
}