/* The Tool Bakery - GPA Calculator & Planner (Educational Light Theme) */

:root{
  --bg:#f7f9fc;
  --card:#ffffff;
  --ink:#0f172a;          /* slate-900 */
  --muted:#475569;        /* slate-600 */
  --line:#e2e8f0;         /* slate-200 */
  --accent:#1f2937;       /* gray-800 for dark buttons */
  --accent-ink:#fff;
  --ghost:#334155;        /* slate-700 */
  --focus:#2563eb;        /* blue-600 */
}

.ttb-gpa-container{
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 16px;
  color: var(--ink);
}

.ttb-title{
  font-size: 28px;
  line-height: 1.2;
  margin: 6px 0 18px 0;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.ttb-card{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin: 16px 0;
  box-shadow: 0 2px 6px rgba(2,6,23,.03);
}

.ttb-subtitle{
  font-size: 20px;
  margin: 4px 0 12px;
  font-weight: 700;
}

.ttb-label{
  display:block;
  font-weight:600;
  margin-bottom:6px;
}

.ttb-input, .ttb-table input, .ttb-table select{
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  background: #fff;
  color: var(--ink);
  outline: none;
}
.ttb-input:focus, .ttb-table input:focus, .ttb-table select:focus{
  border-color: var(--focus);
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}

.ttb-row{
  display:flex; gap:16px; flex-wrap:wrap; align-items:flex-end;
  margin: 8px 0;
}
.ttb-row > div{ flex:1 1 240px; }

.ttb-row-split > div{ flex:1 1 320px; }
.ttb-row-3 > div{ flex:1 1 280px; }

.ttb-checkboxes label, .ttb-radio-group label{
  display:inline-flex; align-items:center; gap:8px; margin-right:16px; font-size:14px; color:var(--muted);
}
.ttb-checkboxes input, .ttb-radio-group input{ transform: translateY(1px); }

.ttb-details summary{
  cursor:pointer; font-weight:600; color:var(--muted);
}
.ttb-details .ttb-thresholds{ margin-top:10px; }
.ttb-thresholds .ttb-grid-7{
  display:grid; grid-template-columns: repeat(6, minmax(120px,1fr)); gap:10px;
}
@media (max-width: 720px){
  .ttb-thresholds .ttb-grid-7{ grid-template-columns: repeat(2, minmax(140px,1fr)); }
}

.ttb-overflow{ overflow:auto; border:1px solid var(--line); border-radius:10px; }

.ttb-table{
  width:100%;
  border-collapse: collapse;
  background:#fff;
}
.ttb-table th, .ttb-table td{
  border-bottom:1px solid var(--line);
  padding:10px 8px;
  text-align:left;
  font-size:14px;
}
.ttb-table thead th{
  font-size:12px; text-transform:uppercase; letter-spacing:.06em; color:var(--muted);
  background:#f8fafc;
}
.ttb-col-num{ width:44px; text-align:center; }
.ttb-col-qp{ width:90px; font-variant-numeric:tabular-nums; }

.ttb-actions{
  display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin-top:12px;
}
.ttb-actions-left{ display:flex; gap:10px; }
.ttb-spacer{ flex:1; }

.ttb-btn{
  background:#fff; color:var(--accent);
  border:1px solid var(--accent);
  border-radius:10px; padding:10px 14px;
  font-weight:700; cursor:pointer; font-size:14px;
}
.ttb-btn:hover{ background:#111827; color:#fff; border-color:#111827; }
.ttb-btn-dark{
  background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
}
.ttb-btn-dark:hover{ background:#111827; border-color:#111827; }
.ttb-btn-ghost{
  background: transparent; color: var(--ghost); border-color: var(--ghost);
}
.ttb-btn-ghost:hover{ background:#1f2937; color:#fff; border-color:#1f2937; }

.ttb-results{
  margin-top:14px;
  border:1px dashed var(--line);
  border-radius:12px;
  padding:12px;
  background: #f8fafc;
}
.ttb-results-grid{
  display:grid; grid-template-columns: repeat(2, minmax(180px,1fr)); gap:10px;
}
@media (max-width: 640px){
  .ttb-results-grid{ grid-template-columns: 1fr; }
}
.ttb-result{ background:#fff; border:1px solid var(--line); border-radius:10px; padding:10px; }
.ttb-result-label{ font-size:12px; color:var(--muted); text-transform:uppercase; letter-spacing:.06em; }
.ttb-result-value{ font-size:20px; font-weight:800; margin-top:2px; }

.ttb-mini{ margin-top:6px; font-size:12px; color:var(--muted); }

.ttb-help{ font-size:13px; color:var(--muted); }

/* Plan sections */
.ttb-plan-avg, .ttb-plan-list{ margin-top:8px; }

.ttb-cell-credits {
  max-width: 75px !important;
}

.ttb-cell-course { max-width: 120px !important; }