:root {
  --bg: #12151a; --panel: #1a202a; --edge: #2a3543; --text: #d8dee9;
  --dim: #7a869a; --accent: #4aa3ff; --warn: #e5a50a; --err: #ef5350;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
       font-family: system-ui, sans-serif; font-size: 14px; }
.mono { font-family: ui-monospace, monospace; }
.dim { color: var(--dim); }
.err { color: var(--err); min-height: 1.2em; }
.warn { color: var(--warn); }

.overlay { position: fixed; inset: 0; background: var(--bg);
           display: flex; align-items: center; justify-content: center; z-index: 10; }
[hidden] { display: none !important; }   /* hidden must beat .overlay's flex */
.card { background: var(--panel); border: 1px solid var(--edge);
        border-radius: 10px; padding: 1.5rem 2rem; width: 22rem;
        display: flex; flex-direction: column; gap: .7rem; }
.card h1 { color: var(--accent); letter-spacing: 3px; margin: 0; }
.card h2 { margin: 0; color: var(--accent); }

input, textarea, select {
  background: var(--bg); color: var(--text); border: 1px solid var(--edge);
  border-radius: 6px; padding: .45rem .6rem; font: inherit; }
button { background: var(--panel); color: var(--text);
  border: 1px solid var(--edge); border-radius: 6px;
  padding: .45rem .9rem; cursor: pointer; font: inherit; }
button:hover { border-color: var(--accent); color: var(--accent); }
button.primary { border-color: var(--accent); color: var(--accent); }

header { display: flex; align-items: center; gap: .6rem;
         padding: .5rem .9rem; border-bottom: 1px solid var(--edge); }
.brand { color: var(--accent); font-weight: 700; letter-spacing: 3px; }
.chip { background: var(--panel); border: 1px solid var(--edge);
        border-radius: 9px; padding: .15rem .7rem;
        font-family: ui-monospace, monospace; font-size: .8rem; }
.spacer { flex: 1; }

main { display: flex; height: calc(100vh - 5.4rem); }
aside#forms { width: 24rem; border-right: 1px solid var(--edge);
              display: flex; flex-direction: column; padding: .6rem; gap: .5rem; }
#formTabs { display: flex; flex-wrap: wrap; gap: .25rem; }
#formTabs button { padding: .25rem .6rem; font-size: .8rem; }
#formTabs button.active { border-color: var(--accent); color: var(--accent); }
#formBody { flex: 1; overflow-y: auto; }
.prow { display: grid; grid-template-columns: 1fr 9rem; gap: .4rem;
        align-items: center; padding: .15rem 0; }
.prow label { font-size: .85rem; }
.runbar { display: flex; gap: .5rem; }
.runbar select { flex: 1; }
progress { width: 100%; height: 10px; }

section#viewArea { flex: 1; display: flex; flex-direction: column;
                   padding: .6rem; gap: .4rem; }
#viewTabs { display: flex; flex-wrap: wrap; gap: .25rem; }
#viewTabs button { padding: .22rem .55rem; font-size: .78rem; }
#viewTabs button.active { border-color: var(--accent); color: var(--accent); }
#plot { flex: 1; min-height: 320px; }
.statusbar { padding: .3rem .9rem; border-top: 1px solid var(--edge);
             color: var(--dim); font-size: .85rem; }