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/* ================================================================
   EquationSolverStandalone — embed-ready
   precisecalcs.com: DM Serif Display · DM Sans · JetBrains Mono
   Accent: #c8522a
   ================================================================ */

.eqs-wrap *, .eqs-wrap *::before, .eqs-wrap *::after {
  box-sizing: border-box; margin: 0; padding: 0;
}

.eqs-wrap {
  --p:       #c8522a;
  --p-dk:    #a8431f;
  --p-soft:  #fdf1ea;
  --p-glow:  rgba(200,82,42,.11);
  --charcoal: #2A2A2E;
  --charcoal-l: #3B3B40;
  --charcoal-text: #E4E4E6;
  --charcoal-muted: #A0A0A4;
  --cream:   #faf8f4;
  --cream-dk:#f0e8dc;
  --white:   #ffffff;
  --ink:     #1e1510;
  --ink-s:   #2b2118;
  --muted:   #7a6a5d;
  --muted-l: #b0a090;
  --border:  #ecdfd2;
  --border-s:#f4ece2;
  --rad-sm:  7px;
  --rad-md:  11px;
  --rad-lg:  16px;

  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-s);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--rad-lg);
  box-shadow: 0 4px 24px rgba(150,100,60,.10);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── top bar ── */
.eqs-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--charcoal);
  gap: 12px;
}

.eqs-heading {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: -.02em;
  color: var(--white);
  white-space: nowrap;
}

.eqs-decimal {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: .75rem;
  font-weight: 500;
  color: var(--charcoal-muted);
  cursor: pointer;
  -webkit-user-select: none;
          user-select: none;
  flex-shrink: 0;
  white-space: nowrap;
}

.eqs-sw {
  width: 34px; height: 19px;
  border-radius: 10px;
  background: var(--charcoal-l);
  border: none;
  position: relative;
  cursor: pointer;
  transition: background .2s;
  padding: 0; flex-shrink: 0;
}
.eqs-sw.on { background: var(--p); }
.eqs-sw-thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--white);
  transition: transform .2s;
  pointer-events: none;
  box-shadow: 0 1px 3px rgba(0,0,0,.15);
}
.eqs-sw.on .eqs-sw-thumb { transform: translateX(15px); }

/* ── body ── */
.eqs-body { padding: 20px 20px 24px; }

/* ── field label ── */
.eqs-wrap .as-field-label {
  display: block;
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 6px;
}

/* ── input ── */
.eqs-wrap .as-input {
  width: 100%;
  padding: 11px 13px;
  border: 1.5px solid var(--border);
  border-radius: var(--rad-md);
  font-family: 'JetBrains Mono', Consolas, monospace;
  font-size: .9rem;
  color: var(--ink-s);
  background: var(--white);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.eqs-wrap .as-input:focus {
  border-color: var(--p);
  box-shadow: 0 0 0 3px var(--p-glow);
}
.eqs-wrap .as-input::placeholder { color: var(--muted-l); }

/* ── example chips ── */
.eqs-wrap .as-examples {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
  margin: 8px 0 0;
}
.eqs-wrap .as-examples-label {
  font-size: .71rem;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}
.eqs-wrap .as-example-chip {
  padding: 3px 9px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--cream);
  color: var(--ink-s);
  font-family: 'JetBrains Mono', Consolas, monospace;
  font-size: .68rem;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color .15s, background .15s, color .15s;
}
.eqs-wrap .as-example-chip:hover {
  border-color: var(--p);
  background: var(--p-soft);
  color: var(--p);
}

/* ── keyboard ── */
.eqs-wrap .as-keyboard {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: var(--rad-md);
  background: var(--cream);
  padding: 12px 13px 10px;
}
.eqs-wrap .as-kb-group { margin-bottom: 9px; }
.eqs-wrap .as-kb-label {
  font-size: .59rem;
  font-weight: 700;
  letter-spacing: .10em;
  text-transform: uppercase;
  color: var(--muted-l);
  margin-bottom: 5px;
}
.eqs-wrap .as-kb-row { display: flex; flex-wrap: wrap; gap: 4px; }
.eqs-wrap .as-kb-key {
  min-width: 33px;
  padding: 5px 8px;
  border: 1px solid var(--charcoal);
  border-radius: var(--rad-sm);
  background: var(--charcoal);
  color: var(--charcoal-text);
  font-family: 'JetBrains Mono', Consolas, monospace;
  font-size: .77rem;
  cursor: pointer;
  transition: border-color .12s, background .12s, transform .08s, color .12s;
  -webkit-user-select: none;
          user-select: none;
  line-height: 1;
}
.eqs-wrap .as-kb-key:hover {
  border-color: var(--p);
  background: var(--p);
  color: var(--white);
}
.eqs-wrap .as-kb-key:active { transform: scale(.91); }
.eqs-wrap .as-kb-actions {
  display: flex;
  gap: 6px;
  border-top: 1px solid var(--border-s);
  padding-top: 8px;
  margin-top: 5px;
}
.eqs-wrap .as-kb-action {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: .74rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: var(--rad-sm);
  transition: color .15s, background .15s;
}
.eqs-wrap .as-kb-action:hover { color: var(--ink-s); background: var(--cream-dk); }
.eqs-wrap .as-kb-clear { color: #b83030; }
.eqs-wrap .as-kb-clear:hover { color: #8c1f1f; background: #fdf0f0; }

/* ── solve button ── */
.eqs-wrap .as-solve-btn {
  display: block;
  width: 100%;
  margin-top: 14px;
  padding: 12px 20px;
  border: none;
  border-radius: var(--rad-md);
  background: var(--p);
  color: var(--white);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: .92rem;
  font-weight: 700;
  letter-spacing: .01em;
  cursor: pointer;
  transition: background .15s, transform .10s, box-shadow .15s;
  box-shadow: 0 2px 10px rgba(200,82,42,.22);
}
.eqs-wrap .as-solve-btn:hover { background: var(--p-dk); box-shadow: 0 4px 16px rgba(200,82,42,.30); }
.eqs-wrap .as-solve-btn:active { transform: scale(.99); }

/* ── results ── */
.eqs-wrap .as-results { margin-top: 20px; }
.eqs-wrap .as-step {
  border: 1px solid var(--border-s);
  border-radius: var(--rad-md);
  padding: 12px 14px;
  margin-bottom: 8px;
  background: var(--white);
  animation: eqs-rise .2s ease both;
}
@keyframes eqs-rise {
  from { opacity:0; transform:translateY(5px); }
  to   { opacity:1; transform:translateY(0); }
}
.eqs-wrap .as-step-head { display: flex; align-items: center; gap: 9px; }
.eqs-wrap .as-step-num {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--p);
  color: var(--white);
  font-size: .68rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.eqs-wrap .as-step-title { font-size: .85rem; font-weight: 700; color: var(--ink); }
.eqs-wrap .as-method-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--cream-dk);
  color: var(--muted);
  font-size: .62rem; font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-left: auto; flex-shrink: 0;
}
.eqs-wrap .as-step-desc {
  margin: 6px 0 0 31px;
  font-size: .77rem; color: var(--muted); line-height: 1.5;
}
.eqs-wrap .as-step-math {
  margin: 8px 0 2px 31px;
  padding: 10px 13px;
  background: var(--cream);
  border-radius: var(--rad-sm);
  border: 1px solid var(--border-s);
  overflow-x: auto;
}
.eqs-wrap .as-answer {
  margin-top: 12px;
  border: 2px solid var(--p);
  border-radius: var(--rad-md);
  background: var(--p-soft);
  padding: 14px 17px;
  animation: eqs-rise .24s ease both;
}
.eqs-wrap .as-answer-label {
  font-size: .62rem; font-weight: 800;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--p); margin-bottom: 7px;
}
.eqs-wrap .as-answer-math { overflow-x: auto; }
.eqs-wrap .as-answer-math .katex-display { margin: 0; }
.eqs-wrap .as-answer-note {
  margin: 8px 0 0;
  font-size: .75rem; color: var(--muted); font-style: italic;
}
.eqs-wrap .as-error {
  margin-top: 14px;
  border: 1px solid #e8c4b4;
  border-radius: var(--rad-md);
  background: #fdf4f0;
  padding: 12px 14px; color: #8c2f17;
  animation: eqs-rise .2s ease both;
}
.eqs-wrap .as-error strong { display: block; font-size: .85rem; font-weight: 700; margin-bottom: 3px; }
.eqs-wrap .as-error p { font-size: .77rem; line-height: 1.5; }

/* ── mobile ── */
@media (max-width: 520px) {
  .eqs-topbar { padding: 12px 14px; }
  .eqs-body { padding: 16px 14px 20px; }
  .eqs-wrap .as-step-desc,
  .eqs-wrap .as-step-math { margin-left: 0; }
  .eqs-wrap .as-kb-key { min-width: 28px; padding: 5px 6px; font-size: .72rem; }
}
@media (prefers-reduced-motion: reduce) {
  .eqs-wrap .as-step, .eqs-wrap .as-answer { animation: none; }
}