/* Neura design system — shared tokens + component classes (brief 28, batch 0).
   SCOPED by design: everything here is a --ds-* variable or a .ds-* class (rule S4 in the brief).
   The pre-existing .ds-grip / .ds-drag / .ds-before / .ds-after / body.ds-on (drag-to-reorder in
   styles.css) belong to a different feature and are NOT touched by this file.
   Sources: Docs/design-system/tokens.json + components/bundle.css + README.md.
   Site variables that already exist (--accent, --surface, --surface-2, --line, --line-strong, --ink,
   --muted, --accent-soft, --accent-ink, --ok, --warn, --err, --radius, --radius-sm, --shadow) are
   REUSED; only the tokens styles.css lacks are added below, light + dark. */

/* ---------- tokens: only what styles.css is missing ---------- */
:root {
  /* radius (site has --radius 16px / --radius-sm 12px already) */
  --ds-radius: 18px;            /* cards, chat panels (tokens.json "radius") */
  --ds-radius-lg: 22px;         /* the one hero card / prompt bar */
  --ds-radius-chip: 8px;        /* tags, small chips */
  --ds-radius-pill: 980px;      /* every button and pill */

  /* text/icons on a teal fill (the dark accent is light, so dark needs dark text) */
  --ds-on-accent: #ffffff;

  /* spacing scale — styles.css declares none; these are the paddings the screens share */
  --ds-space-1: 4px;  --ds-space-2: 8px;  --ds-space-3: 12px; --ds-space-4: 16px;
  --ds-space-5: 20px; --ds-space-6: 24px; --ds-space-8: 32px; --ds-space-12: 48px; --ds-space-16: 64px;
  --ds-measure: 680px;          /* reading width */

  /* motion */
  --ds-dur-fast: 150ms; --ds-dur: 220ms;
  --ds-ease-out: cubic-bezier(.2, .8, .2, 1);

  /* depth (site has --shadow already) */
  --ds-shadow-hover: 0 2px 4px rgba(0,0,0,.05), 0 12px 32px rgba(0,0,0,.09);

  /* focus halo: 4px of accent-soft (same as the site's input focus) */
  --ds-focus: 0 0 0 4px var(--accent-soft);

  /* status pairs alias the site's own theme-aware variables (same values, system names) */
  --ds-ok-soft: var(--good-bg);         --ds-ok-ink: var(--good-ink);
  --ds-warn-soft: var(--warnc-bg);      --ds-warn-ink: var(--warnc-ink);
  --ds-err-soft: var(--bad-bg);         --ds-err-ink: var(--bad-ink);
  --ds-neutral-soft: var(--neutral-bg); --ds-neutral-ink: var(--neutral-ink);
}
@media (prefers-color-scheme: dark) {
  :root { --ds-on-accent: #03201c; --ds-shadow-hover: 0 2px 4px rgba(0,0,0,.5), 0 12px 36px rgba(0,0,0,.55); }
}
/* Manual override wins over the media query (same pattern as styles.css). */
html[data-theme="light"] { --ds-on-accent: #ffffff; --ds-shadow-hover: 0 2px 4px rgba(0,0,0,.05), 0 12px 32px rgba(0,0,0,.09); }
html[data-theme="dark"]  { --ds-on-accent: #03201c; --ds-shadow-hover: 0 2px 4px rgba(0,0,0,.5), 0 12px 36px rgba(0,0,0,.55); }

/* ---------- Card: the white panel every step of a tool lives in ---------- */
.ds-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--ds-radius);
  padding: var(--ds-space-8); box-shadow: var(--shadow); }
.ds-card.ds-lg { border-radius: var(--ds-radius-lg); }
.ds-card h2 { margin: 0 0 var(--ds-space-1); font-size: 23px; line-height: 1.2; font-weight: 650; letter-spacing: -.02em; }
.ds-sub { margin: 0 0 22px; color: var(--muted); font-size: 16px; }
@media (max-width: 560px) { .ds-card { padding: var(--ds-space-6); } }

/* ---------- Button: one full-pill pair; primary ONCE per screen (R1) ---------- */
.ds-btn-primary, .ds-btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--ds-space-2);
  min-height: 44px; padding: 10px 22px; font: inherit; font-size: 16px; font-weight: 600; letter-spacing: -.01em;
  border: 1px solid transparent; border-radius: var(--ds-radius-pill); cursor: pointer;
  transition: transform var(--ds-dur-fast) var(--ds-ease-out), background-color var(--ds-dur-fast) var(--ds-ease-out),
    border-color var(--ds-dur-fast) var(--ds-ease-out), filter var(--ds-dur-fast) var(--ds-ease-out);
}
.ds-btn-primary { background: var(--accent); color: var(--ds-on-accent); }
.ds-btn-primary:hover { transform: scale(1.02); filter: brightness(1.08); }
.ds-btn-ghost { background: var(--surface); border-color: var(--line-strong); color: var(--ink); }
.ds-btn-ghost:hover { background: var(--accent-soft); transform: scale(1.02); }
.ds-btn-primary:active, .ds-btn-ghost:active { transform: scale(.97); }
.ds-btn-primary:disabled, .ds-btn-ghost:disabled { opacity: .45; cursor: not-allowed; transform: none; filter: none; }
.ds-btn-primary:focus-visible, .ds-btn-ghost:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.ds-btn-primary svg, .ds-btn-ghost svg { flex: none; }
.ds-btn-small { min-height: 36px; padding: 6px 16px; font-size: 14.5px; }
.ds-btn-large { min-height: 52px; padding: 14px 28px; font-size: 17px; }
.ds-btn-block { width: 100%; }

/* ds-two: the two-button row of a result (Download ghost + Next step primary) */
.ds-two { display: flex; gap: var(--ds-space-3); flex-wrap: wrap; justify-content: flex-end; margin-top: var(--ds-space-6); }
.ds-two .ds-btn-primary, .ds-two .ds-btn-ghost { flex: 1 1 180px; }
@media (min-width: 560px) { .ds-two .ds-btn-primary, .ds-two .ds-btn-ghost { flex: 0 1 auto; min-width: 160px; } }

/* ---------- TextField: label above every input, never placeholder-only ---------- */
.ds-field + .ds-field { margin-top: var(--ds-space-4); }
.ds-label { display: block; font-weight: 500; font-size: 14px; margin: 0 0 7px; }
.ds-field input, .ds-field textarea, .ds-field select {
  width: 100%; padding: 13px 14px; font: inherit; font-size: 16px;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  background: var(--surface-2); color: var(--ink);
  transition: border-color var(--ds-dur) var(--ds-ease-out), box-shadow var(--ds-dur) var(--ds-ease-out);
}
.ds-field input:focus, .ds-field textarea:focus, .ds-field select:focus { outline: none; border-color: var(--accent); box-shadow: var(--ds-focus); }
.ds-field input::placeholder, .ds-field textarea::placeholder { color: var(--muted); }
.ds-help { margin: 7px 0 0; font-size: 13px; color: var(--muted); }
.ds-field.ds-err input, .ds-field.ds-err textarea, .ds-field.ds-err select { border-color: var(--err); }
.ds-field.ds-err .ds-help { color: var(--err); }

/* ---------- Pill: always with a word; colour never alone ---------- */
.ds-pill { display: inline-flex; align-items: center; gap: var(--ds-space-1); padding: 4px 12px;
  border-radius: var(--ds-radius-pill); font-size: 12px; font-weight: 600; white-space: nowrap; }
.ds-pill svg { width: 14px; height: 14px; flex: none; }
.ds-pill-accent  { background: var(--accent-soft);      color: var(--accent-ink); }
.ds-pill-ok      { background: var(--ds-ok-soft);       color: var(--ds-ok-ink); }
.ds-pill-warn    { background: var(--ds-warn-soft);     color: var(--ds-warn-ink); }
.ds-pill-err     { background: var(--ds-err-soft);      color: var(--ds-err-ink); }
.ds-pill-neutral { background: var(--ds-neutral-soft);  color: var(--ds-neutral-ink); }

/* ---------- Notice: what happened + what to do next, one small action ---------- */
.ds-notice { display: flex; gap: var(--ds-space-3); align-items: center; justify-content: space-between; flex-wrap: wrap;
  padding: 12px 16px; border-radius: var(--radius-sm); background: var(--surface-2); border: 1px solid var(--line); font-size: 14px; }
.ds-notice-ok   { background: var(--ds-ok-soft);   border-color: var(--ds-ok-soft);   color: var(--ds-ok-ink); }
.ds-notice-warn { background: var(--ds-warn-soft); border-color: var(--ds-warn-soft); color: var(--ds-warn-ink); }
.ds-notice-err  { background: var(--ds-err-soft);  border-color: var(--ds-err-soft);  color: var(--ds-err-ink); }
.ds-notice .ds-btn-small.ds-btn-ghost { min-height: 32px; }

/* ---------- Result: answer first (R2), proof behind one fold, est line (R7) ---------- */
.ds-result > .ds-pill { margin-bottom: 10px; }
.ds-answer { font-size: 26px; line-height: 1.3; font-weight: 650; letter-spacing: -.02em; margin: var(--ds-space-2) 0 0; }
.ds-est { display: inline-flex; align-items: center; gap: 6px; margin: 14px 0 0; font-size: 13.5px; color: var(--muted); }
.ds-est svg { width: 16px; height: 16px; flex: none; }
details.ds-proof { margin-top: 20px; border-top: 1px solid var(--line); padding-top: 16px; }
.ds-proof summary { cursor: pointer; font-weight: 600; font-size: 15.5px; list-style: none;
  display: flex; align-items: center; gap: var(--ds-space-2); color: var(--ink); }
.ds-proof summary::-webkit-details-marker { display: none; }
.ds-proof summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.ds-proof summary svg.ds-proof-arr { transition: transform var(--ds-dur) var(--ds-ease-out); }
.ds-proof[open] summary svg.ds-proof-arr { transform: rotate(90deg); }
.ds-proof-in { margin-top: 14px; display: grid; gap: var(--ds-space-3); font-size: 14.5px; color: var(--muted); }

/* ---------- Price box: shown BEFORE any button that leads to payment (R7) ---------- */
.ds-price { display: flex; justify-content: space-between; align-items: center; gap: var(--ds-space-3); flex-wrap: wrap;
  padding: 14px 16px; border-radius: var(--radius-sm); background: var(--surface-2); border: 1px solid var(--line); }
.ds-price b { font-size: 22px; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.ds-price .ds-price-cur { color: var(--muted); font-size: 14px; font-weight: 600; }
.ds-price .ds-price-m { color: var(--muted); font-size: 13.5px; display: block; }

/* ---------- Project strip: "Using your project: … · Change" (R5) ---------- */
.ds-proj { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding: 8px 14px; margin: 0 0 var(--ds-space-4);
  background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--ds-radius-pill);
  font-size: 13.5px; color: var(--muted); }
.ds-proj svg { flex: none; color: var(--accent); }
.ds-proj b { color: var(--ink); font-weight: 600; }
.ds-proj .ds-proj-change { background: none; border: 0; padding: 0; color: var(--accent); font: inherit; font-weight: 600;
  cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.ds-proj .ds-proj-change:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- Empty state (R8): dashed card + the first step ---------- */
.ds-empty { border: 1.5px dashed var(--line-strong); border-radius: var(--ds-radius); background: transparent; box-shadow: none;
  padding: var(--ds-space-8); text-align: center; display: flex; flex-direction: column; align-items: center; gap: 10px; }
.ds-empty svg { color: var(--muted); }
.ds-empty h3 { margin: 0; font-size: 18px; }
.ds-empty p { margin: 0; color: var(--muted); font-size: 14.5px; max-width: 46ch; }
.ds-empty .ds-btn-ghost { margin-top: 6px; }
@media (max-width: 560px) { .ds-empty { padding: var(--ds-space-6); } }

/* ---------- Error state (R8): what happened + nothing is lost + Retry ---------- */
.ds-error { border: 1px solid var(--ds-err-soft); background: var(--ds-err-soft); border-radius: var(--ds-radius);
  padding: var(--ds-space-8); }
.ds-error .ds-error-what { margin: 0 0 6px; font-size: 17px; font-weight: 600; color: var(--ds-err-ink); }
.ds-error .ds-error-safe { margin: 0; color: var(--ink); font-size: 14.5px; }
.ds-error .ds-two { justify-content: flex-start; }

/* ---------- Working (R3): step lines that tick ✓; never a bare spinner ---------- */
.ds-steps { display: grid; gap: var(--ds-space-3); }
.ds-step { display: flex; align-items: center; gap: var(--ds-space-3); font-size: 16px; color: var(--muted); }
.ds-ck { width: 26px; height: 26px; border-radius: 50%; border: 2px solid var(--line-strong);
  display: grid; place-items: center; flex: none; }
.ds-ck svg { width: 14px; height: 14px; opacity: 0; stroke-width: 3; }
.ds-step.ds-on { color: var(--ink); }
.ds-step.ds-on .ds-ck { border-color: var(--accent); border-top-color: transparent; animation: ds-spin .9s linear infinite; }
.ds-step.ds-done { color: var(--ink); }
.ds-step.ds-done .ds-ck { background: var(--accent); border-color: var(--accent); color: var(--ds-on-accent); }
.ds-step.ds-done .ds-ck svg { opacity: 1; }
.ds-working-note { margin: 22px 0 0; color: var(--muted); font-size: 14px; }
@keyframes ds-spin { to { transform: rotate(360deg); } }

/* ---------- Free uses left (R8): shown on the Input screen ---------- */
.ds-free { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 0 0 var(--ds-space-4);
  font-size: 13.5px; color: var(--muted); }
.ds-free .ds-pill { font-variant-numeric: tabular-nums; }

/* ---------- More menu (S2): the home of extra actions; one ghost button ---------- */
.ds-more { position: relative; display: inline-block; }
.ds-more-btn svg.ds-more-arr { transform: rotate(45deg); }   /* the arrow becomes a down chevron */
.ds-more-list { position: absolute; top: calc(100% + 6px); inset-inline-end: 0; min-width: 220px; margin: 0; padding: 6px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--ds-radius);
  box-shadow: var(--ds-shadow-hover); display: grid; gap: 2px; z-index: 40; }
.ds-more-list[hidden] { display: none; }
.ds-more-list button { display: flex; align-items: center; gap: 8px; width: 100%; text-align: start; padding: 10px 12px;
  background: none; border: 0; border-radius: var(--ds-radius-chip); color: var(--ink); font: inherit; font-size: 14.5px; cursor: pointer; }
.ds-more-list button:hover { background: var(--accent-soft); }
.ds-more-list button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- Bottom sheet (phones): panel slides from the bottom edge ---------- */
.ds-sheet { position: fixed; inset: 0; background: rgba(0,0,0,.28); z-index: 60; display: flex; align-items: flex-end; justify-content: center; }
.ds-sheet[hidden] { display: none; }
.ds-sheet-panel { width: min(680px, 100%); max-height: 86vh; overflow: auto; background: var(--surface);
  border-start-start-radius: var(--ds-radius-lg); border-start-end-radius: var(--ds-radius-lg);
  padding: 8px 20px calc(28px + env(safe-area-inset-bottom)); box-shadow: 0 -10px 50px rgba(0,0,0,.2); text-align: start; }

/* ---------- Arabic is first-class (R6) ---------- */
.ds-flip svg { transition: transform var(--ds-dur) var(--ds-ease-out); }
[dir="rtl"] .ds-flip svg { transform: scaleX(-1); }          /* directional icons only — never the logo, checks or numbers */
[dir="rtl"] .ds-answer, [dir="rtl"] .ds-card h2, [dir="rtl"] .ds-empty h3,
[dir="rtl"] .ds-sub, [dir="rtl"] .ds-proof-in, [dir="rtl"] .ds-error-safe { letter-spacing: 0; line-height: 1.7; }
[dir="rtl"] .ds-btn-primary, [dir="rtl"] .ds-btn-ghost, [dir="rtl"] .ds-more-list button { letter-spacing: 0; }

/* ---------- Reduced motion: all of it off ---------- */
@media (prefers-reduced-motion: reduce) {
  .ds-btn-primary, .ds-btn-ghost, .ds-proof summary svg.ds-proof-arr, .ds-flip svg { transition: none; }
  .ds-btn-primary:hover, .ds-btn-ghost:hover { transform: none; }
  .ds-step.ds-on .ds-ck { animation: none; }
}