/* Desktop-first app shell (>=1024px) with single-column mobile flow below. */
.app{height:100vh;height:100dvh;display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr);grid-template-rows:var(--topbar-h) minmax(0,1fr) auto}

.topbar{grid-column:1/-1;display:flex;align-items:center;gap:16px;padding:0 20px;border-bottom:1px solid var(--line);background:var(--surface)}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand-mark{width:30px;height:30px;border-radius:9px;background:var(--brand);color:var(--brand-ink);display:grid;place-items:center;flex:none}
.brand b{font-size:16px;font-weight:650;letter-spacing:-.01em;white-space:nowrap}
.collection{color:var(--muted);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding-left:14px;border-left:1px solid var(--line)}
.topbar .spacer{flex:1}
.shortcut-hint{font-size:12px;color:var(--faint);white-space:nowrap}

.sidebar{grid-row:2;display:flex;flex-direction:column;min-height:0;border-right:1px solid var(--line);background:var(--ground)}
.side-head{padding:14px 14px 10px;display:flex;flex-direction:column;gap:10px;flex:none}
.side-scroll{flex:1;overflow-y:auto;overscroll-behavior:contain;padding:0 14px 14px}
.side-foot{flex:none;padding:10px 14px 14px;border-top:1px solid var(--line)}
.add-btn{width:100%;height:42px;border-radius:12px;border:1px dashed var(--line);color:var(--brand-text);font-weight:600;display:flex;align-items:center;justify-content:center;gap:6px;background:var(--surface)}
.add-btn:hover{border-color:var(--brand)}

.workspace{grid-row:2;overflow-y:auto;overscroll-behavior:contain;min-height:0}
.work-grid{display:grid;grid-template-columns:minmax(0,1fr) var(--right-w);gap:20px;padding:20px 24px 32px;max-width:1240px;margin:0 auto;align-items:start}
.main-col{display:flex;flex-direction:column;gap:14px;min-width:0}
.right-col{position:sticky;top:20px;display:flex;flex-direction:column;gap:12px}

.drug-head{padding:4px 2px 2px;display:flex;gap:16px;align-items:flex-start}
.drug-head .titles{flex:1;min-width:0}
.drug-head h1{margin:0;font-size:30px;letter-spacing:-.02em;font-weight:650;line-height:1.1;text-wrap:balance;overflow-wrap:anywhere}
.drug-head .trade{color:var(--muted);margin-top:4px}
.head-actions{display:flex;gap:4px;flex:none}
.back-btn{display:none}
.notes-card h2{margin:0}
.notes-card .pip{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--crit);margin-left:6px;vertical-align:middle}

.welcome{padding:64px 24px;text-align:center;color:var(--muted);display:flex;flex-direction:column;align-items:center;gap:10px}
.welcome h1{margin:0;color:var(--ink);font-size:22px;letter-spacing:-.01em}
.welcome p{margin:0;max-width:44ch}
.boot{grid-column:1/-1;grid-row:2;display:grid;place-items:center;color:var(--muted);padding:24px;text-align:center}

.app-footer{grid-column:1/-1;padding:8px 20px;border-top:1px solid var(--line);background:var(--surface);color:var(--muted);font-size:12px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* dialogs */
dialog{border:0;padding:0;background:var(--surface);color:var(--ink);box-shadow:var(--shadow);max-height:calc(100dvh - 48px)}
dialog::backdrop{background:var(--scrim)}
.dlg{width:min(440px,calc(100vw - 32px));border-radius:20px}
.dlg-inner{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px}
.dlg h2{margin:0;font-size:20px;letter-spacing:-.01em}
.dlg-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.dlg-actions{display:flex;flex-direction:column;gap:8px;margin-top:6px}
.dlg[open]{animation:dlg-in .22s cubic-bezier(.2,.8,.2,1)}
@keyframes dlg-in{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}
.ibw-preview{display:flex;justify-content:space-between;align-items:baseline;padding:12px 14px;border-radius:12px;background:var(--brand-soft)}
.ibw-preview .num{font-size:22px;font-weight:600;color:var(--brand-text)}
.err{color:var(--crit);font-size:12.5px;min-height:18px}

.dlg-xl{width:min(1080px,calc(100vw - 48px));height:min(760px,calc(100dvh - 48px));border-radius:24px;background:var(--ground)}
.drawer{margin:0 0 0 auto;height:100dvh;max-height:100dvh;width:min(560px,100vw);border-radius:20px 0 0 20px;background:var(--ground)}
.drawer[open]{animation:drawer-in .26s cubic-bezier(.2,.8,.2,1)}
@keyframes drawer-in{from{transform:translateX(40px);opacity:0}to{transform:none;opacity:1}}
.panel{display:flex;flex-direction:column;height:100%}
.panel-nav{flex:none;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line);background:var(--surface)}
.nav-title{display:flex;flex-direction:column;align-items:center;line-height:1.25;min-width:0}
.nav-title b{font-size:15px;font-weight:600}
.nav-title span{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:260px}
.panel-body{flex:1;overflow-y:auto;overscroll-behavior:contain;padding:16px;display:flex;flex-direction:column;gap:12px}

/* ---------- below 1024px: prototype's single-column flow ---------- */
@media (max-width:1023.98px){
  .app{display:flex;flex-direction:column;height:auto;min-height:100dvh}
  .topbar{position:sticky;top:0;z-index:5;height:56px;padding:0 16px;gap:10px}
  .collection,.shortcut-hint{display:none}
  .sidebar{border-right:0;flex:1}
  .side-head{padding:12px 16px 8px}
  .side-scroll{overflow:visible;padding:0 16px 16px}
  .side-foot{border-top:0;padding:0 16px 16px}
  .workspace{overflow:visible;flex:1}
  .work-grid{grid-template-columns:minmax(0,1fr);padding:12px 16px 24px;gap:12px}
  .right-col{position:static}
  .drug-head h1{font-size:26px}
  .back-btn{display:grid;margin-left:-8px}
  .app[data-screen="library"] .workspace{display:none}
  .app[data-screen="drug"] .sidebar{display:none}
  .welcome{display:none}
  .app-footer{padding:10px 16px 16px}
  .dlg-xl,.drawer{width:100vw;max-width:100vw;height:100dvh;max-height:100dvh;margin:0;border-radius:0}
  .dlg{margin:auto auto 0;width:100vw;max-width:100vw;border-radius:24px 24px 0 0}
}
@media (max-width:480px){
  .fields{grid-template-columns:1fr 1fr}
  .ro-main .v{font-size:46px}
  .big-input input{font-size:30px}
}