/* demo.css — the product demonstration.
 *
 * Built on the brand tokens rather than a new palette: one accent, the warm
 * neutral surface, the existing type scale. No gradients, no glass, no orbs,
 * no shadow on everything. Borders and spacing carry the hierarchy.
 */

.dm {
    display: grid;
    grid-template-columns: minmax(230px, 300px) 1fr;
    gap: var(--bd-space-6, 32px);
    align-items: start;
    max-width: 1100px;
    margin: 0 auto;
}

/* ── The rail of tools ── */
.dm-rail { display: flex; flex-direction: column; border-left: 2px solid var(--sd-line); }
.dm-tab {
    appearance: none; background: none; border: 0;
    border-left: 2px solid transparent; margin-left: -2px;
    padding: 14px 18px; text-align: left; cursor: pointer;
    font: inherit; color: var(--sd-muted);
    display: block; width: 100%;
}
.dm-tab b {
    display: block; font-family: var(--bd-font-display, Georgia, serif);
    font-size: 1.0625rem; font-weight: 600; color: var(--sd-ink-2);
    letter-spacing: -0.01em; margin-bottom: 3px;
}
.dm-tab span { display: block; font-size: var(--bd-fs-sm, 0.875rem); line-height: 1.5; }
.dm-tab:hover b { color: var(--sd-ink); }
.dm-tab.on { border-left-color: var(--bd-accent, #0f9bbd); }
.dm-tab.on b { color: var(--sd-ink); }
.dm-tab.on span { color: var(--sd-ink-2); }
.dm-tab:focus-visible { outline: 2px solid var(--bd-accent, #0f9bbd); outline-offset: -2px; }

/* ── The stage ── */
.dm-stage { border: 1px solid var(--sd-line); border-radius: 6px; overflow: hidden; background: var(--tool-surface, #fff); }
.dm-stage-bar {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding: 10px 16px; border-bottom: 1px solid var(--sd-line);
    font-size: var(--bd-fs-xs, 0.75rem);
}
.dm-meta { color: var(--sd-muted); }
.dm-saved {
    color: var(--sd-dim); letter-spacing: 0.06em; text-transform: uppercase;
    font-weight: 700; font-size: 0.6875rem; white-space: nowrap;
}
.dm-panel { padding: var(--bd-space-5, 24px); }
.dm-panel:focus-visible { outline: 2px solid var(--bd-accent, #0f9bbd); outline-offset: -2px; }
.dm-in { animation: dmIn 140ms ease-out; }
@keyframes dmIn { from { opacity: 0; } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .dm-in { animation: none; } }

.dm-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.dm-kicker {
    font-size: 0.6875rem; letter-spacing: 0.08em; text-transform: uppercase;
    font-weight: 700; color: var(--bd-accent-text, #25b4d4);
}
.dm-chip-row { display: inline-flex; align-items: baseline; gap: 10px; }
.dm-label { font-size: var(--bd-fs-sm, 0.875rem); color: var(--sd-muted); }
.dm-chip {
    font-size: var(--bd-fs-sm, 0.875rem); font-weight: 700; color: var(--sd-ink);
    background: rgba(var(--sd-tint-rgb), 0.07); border: 1px solid var(--sd-line);
    border-radius: 4px; padding: 2px 9px;
}
.dm-q { font-size: var(--bd-fs-base, 1rem); line-height: 1.6; color: var(--sd-ink); margin: 0 0 14px; }
.dm-q.dm-quiet { color: var(--sd-muted); font-size: var(--bd-fs-sm, 0.875rem); }
.dm-list { margin: 12px 0 0; padding-left: 18px; }
.dm-list li { font-size: var(--bd-fs-sm, 0.875rem); line-height: 1.6; color: var(--sd-ink-2); margin-bottom: 6px; }

/* Answer lines, the way the real paper shows them. */
.dm-lines { margin-top: 4px; }
.dm-lines i { display: block; height: 26px; border-bottom: 1px solid var(--sd-line); }

/* ── The figure ── */
.dm-fig { border: 1px solid var(--sd-line); border-radius: 4px; padding: 14px; margin: 0 0 14px; }
.dm-fig-cap { font-size: var(--bd-fs-sm, 0.875rem); font-weight: 700; color: var(--sd-ink); margin-bottom: 10px; }
.dm-fig-plot svg { display: block; width: 100%; height: auto; }
.dm-grid { stroke: var(--sd-line); stroke-width: 1; }
.dm-tick, .dm-axis { fill: var(--sd-muted); font-size: 9px; font-family: var(--bd-font-body, sans-serif); }
.dm-axis { font-weight: 700; font-size: 9.5px; }
.dm-slab { fill: var(--sd-ink-2); font-size: 10px; font-weight: 700; font-family: var(--bd-font-body, sans-serif); }
.dm-line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.dm-line-a { stroke: var(--sd-muted); }
.dm-line-b { stroke: var(--bd-accent, #0f9bbd); }

/* ── Marked-feedback blocks, same shapes the product uses ── */
.dm-block { border-left: 2px solid var(--dm-rail-c, var(--sd-line)); padding: 8px 0 8px 13px; margin-bottom: 12px; }
.dm-block-label {
    font-size: 0.6875rem; letter-spacing: 0.06em; text-transform: uppercase;
    font-weight: 700; color: var(--dm-rail-c, var(--sd-muted)); margin-bottom: 4px;
}
.dm-block-body { font-size: var(--bd-fs-sm, 0.875rem); line-height: 1.6; color: var(--sd-ink-2); }
.dm-block-body b { color: var(--sd-ink); }
.dm-earned  { --dm-rail-c: var(--sd-ok); }
.dm-missing { --dm-rail-c: var(--sd-warn); }
.dm-sharpen { --dm-rail-c: var(--bd-accent, #0f9bbd); }
.dm-next    { --dm-rail-c: var(--bd-accent-text, #25b4d4); }

.dm-swap { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.dm-was, .dm-now { border: 1px solid var(--sd-line); border-radius: 4px; padding: 8px 11px; font-size: var(--bd-fs-sm, 0.875rem); line-height: 1.5; }
.dm-was { color: var(--sd-muted); }
.dm-now { color: var(--sd-ink); border-color: rgba(var(--sd-tint-rgb), 0.28); background: rgba(var(--sd-tint-rgb), 0.04); }
.dm-was span, .dm-now span {
    display: block; font-size: 0.625rem; letter-spacing: 0.07em; text-transform: uppercase;
    font-weight: 700; margin-bottom: 4px; color: var(--sd-dim);
}
.dm-now span { color: var(--bd-accent-text, #25b4d4); }

/* ── Chat ── */
.dm-chat { display: flex; flex-direction: column; gap: 12px; }
.dm-msg { font-size: var(--bd-fs-sm, 0.875rem); line-height: 1.6; border-radius: 4px; padding: 11px 14px; }
.dm-msg p { margin: 0 0 9px; }
.dm-msg p:last-child { margin-bottom: 0; }
.dm-you { align-self: flex-end; max-width: 80%; background: rgba(var(--sd-tint-rgb), 0.06); color: var(--sd-ink-2); border: 1px solid var(--sd-line); }
.dm-ai { color: var(--sd-ink-2); border-left: 2px solid var(--bd-accent, #0f9bbd); padding-left: 14px; border-radius: 0; }
.dm-aside { color: var(--sd-muted); font-size: 0.8125rem; border-top: 1px solid var(--sd-line); padding-top: 9px; margin-top: 11px !important; }

@media (max-width: 860px) {
    .dm { grid-template-columns: 1fr; gap: var(--bd-space-4, 16px); }
    .dm-rail { flex-direction: row; overflow-x: auto; border-left: 0; border-bottom: 2px solid var(--sd-line); margin-bottom: 4px; }
    .dm-tab { border-left: 0; border-bottom: 2px solid transparent; margin: 0 0 -2px; padding: 10px 14px; white-space: nowrap; width: auto; flex: none; }
    .dm-tab span { display: none; }
    .dm-tab.on { border-left-color: transparent; border-bottom-color: var(--bd-accent, #0f9bbd); }
    .dm-panel { padding: var(--bd-space-4, 16px); }
    .dm-swap { grid-template-columns: 1fr; }
}