/* OChem Board Tools — Molecule Studio + Calculators (static) */
.studio-grid { display: grid; gap: 1.25rem; grid-template-columns: 1.5fr 1fr; }
@media (max-width: 880px) { .studio-grid { grid-template-columns: 1fr; } }

.search-bar { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.search-bar input { flex: 1; min-width: 220px; padding: 0.7rem 0.85rem; border: 1px solid var(--border); border-radius: 8px; font: inherit; }
.search-bar input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(26,60,94,0.12); }

.viewer-tile { width: 100%; height: 400px; border: 1px solid var(--border); border-radius: 12px; background: #fff; position: relative; overflow: hidden; }
.viewer-2d { display: flex; align-items: center; justify-content: center; min-height: 400px; border: 1px solid var(--border); border-radius: 12px; background: #fff; padding: 1rem; }
.viewer-2d svg { max-width: 100%; height: auto; }
.viewer-empty { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 400px; border: 1px dashed var(--border); border-radius: 12px; color: var(--text-muted); text-align: center; gap: 0.5rem; }

.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 0.75rem; }
.tabs { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; padding: 2px; }
.tabs button { border: 0; background: transparent; padding: 0.35rem 0.9rem; border-radius: 6px; font: inherit; font-weight: 600; color: var(--text-muted); cursor: pointer; }
.tabs button.active { background: var(--blue); color: #fff; }

.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip { border: 1px solid var(--border); background: #fff; color: var(--text-muted); border-radius: 999px; padding: 0.25rem 0.7rem; font-size: 0.8rem; font-weight: 600; cursor: pointer; }
.chip.active { border-color: var(--blue); background: #eaf0f8; color: var(--blue); }

.lib-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 0.5rem; }
.lib-item { border: 1px solid var(--border); background: var(--bg-light); border-radius: 8px; padding: 0.5rem 0.7rem; text-align: left; font: inherit; font-size: 0.88rem; font-weight: 500; color: var(--text-dark); cursor: pointer; }
.lib-item:hover { border-color: var(--yellow-dark); box-shadow: var(--shadow); }

.prop-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0.6rem 1rem; margin: 1rem 0; }
.prop-list .k { font-size: 0.72rem; color: var(--text-muted); }
.prop-list .v { font-weight: 700; color: var(--text-dark); }

.rule { display: inline-flex; align-items: center; gap: 0.3rem; border-radius: 999px; padding: 0.25rem 0.7rem; font-size: 0.78rem; font-weight: 700; }
.rule.pass { background: #e8f7ee; color: #2f855a; }
.rule.fail { background: #fdf6dc; color: #b48d1e; }

.calc-table { width: 100%; font-size: 0.9rem; border-collapse: collapse; margin-top: 0.75rem; }
.calc-table th { text-align: left; font-size: 0.72rem; color: var(--text-muted); font-weight: 600; padding-bottom: 0.3rem; }
.calc-table td { border-top: 1px solid var(--border); padding: 0.3rem 0; }
.calc-grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.solved input { border-color: var(--yellow-dark) !important; background: #fffbe9 !important; font-weight: 700; }
.smiles { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 0.75rem; color: var(--text-muted); word-break: break-all; }
.err { color: #c53030; font-size: 0.9rem; margin-top: 0.5rem; }
.fg-row { margin-top: 0.75rem; display: flex; align-items: center; flex-wrap: wrap; gap: 0.4rem; }

/* Draw modal */
.draw-modal { position: fixed; inset: 0; background: rgba(18,44,70,0.55); z-index: 100; display: flex; align-items: center; justify-content: center; padding: 1rem; }
.draw-modal[hidden] { display: none; }
.draw-panel { background: #fff; border-radius: 14px; box-shadow: var(--shadow-lg); width: 100%; max-width: 820px; padding: 1rem 1.1rem 1.1rem; }
.draw-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.6rem; }
.draw-foot { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; margin-top: 0.75rem; }
#composerHost { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }