:root {
  --ayli-ink: #12233f;
  --ayli-muted: #63718a;
  --ayli-blue: #183f8c;
  --ayli-blue-2: #2457b8;
  --ayli-pink: #d51f5d;
  --ayli-soft: #f5f8fc;
  --ayli-line: #dfe6f0;
  --ayli-good: #147a50;
  --ayli-warn: #9c6710;
  --ayli-shadow: 0 20px 55px rgba(18, 35, 63, .09);
}

.ayli-wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 18px 70px;
  color: var(--ayli-ink);
  font-family: inherit;
}

.ayli-wrap * { box-sizing: border-box; }
.ayli-wrap button, .ayli-wrap input, .ayli-wrap select { font: inherit; }

.ayli-hero {
  position: relative;
  overflow: hidden;
  border-radius: 26px;
  padding: 42px 44px;
  margin-bottom: 22px;
  background: linear-gradient(135deg, #102a61 0%, #183f8c 62%, #2158b7 100%);
  color: #fff;
  box-shadow: var(--ayli-shadow);
}

.ayli-hero::after {
  content: '∫';
  position: absolute;
  right: 42px;
  top: -65px;
  font: 700 230px/1 Georgia, serif;
  color: rgba(255,255,255,.075);
  transform: rotate(5deg);
}

.ayli-eyebrow, .ayli-kicker {
  display: block;
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  font-weight: 800;
}

.ayli-eyebrow { color: #d8e5ff; margin-bottom: 7px; }
.ayli-kicker { color: var(--ayli-blue-2); margin-bottom: 4px; }
.ayli-hero h1 { margin: 0 0 8px; font-size: clamp(32px, 5vw, 52px); line-height: 1.04; color: #fff; }
.ayli-hero p { max-width: 760px; margin: 0; font-size: 17px; line-height: 1.65; color: #e7efff; }

.ayli-calculator, .ayli-history-section, .ayli-seo-content {
  background: #fff;
  border: 1px solid var(--ayli-line);
  border-radius: 24px;
  box-shadow: var(--ayli-shadow);
}

.ayli-calculator { padding: 24px; }
.ayli-tabs { display: inline-flex; gap: 5px; padding: 5px; margin-bottom: 26px; border-radius: 14px; background: #edf2f9; }
.ayli-tab { border: 0; border-radius: 10px; padding: 10px 17px; background: transparent; color: #506079; font-weight: 800; cursor: pointer; }
.ayli-tab.is-active { background: #fff; color: var(--ayli-blue); box-shadow: 0 3px 12px rgba(20,44,84,.1); }

.ayli-grid { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 28px; align-items: start; }
.ayli-label { display: block; margin: 0 0 7px; font-size: 13px; font-weight: 800; color: #374968; }
.ayli-expression-row { display: grid; grid-template-columns: auto minmax(0,1fr) auto; gap: 12px; align-items: center; }
.ayli-integral-symbol { font: 500 54px/1 Georgia, serif; color: var(--ayli-blue); }
.ayli-dx { font: 700 20px/1.1 Georgia, serif; color: #394a66; white-space: nowrap; }

.ayli-input {
  width: 100%;
  min-height: 50px;
  border: 1.5px solid #cad5e5;
  border-radius: 12px;
  padding: 11px 14px;
  color: #172944;
  background: #fff;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.ayli-input:focus { border-color: var(--ayli-blue-2); box-shadow: 0 0 0 4px rgba(36,87,184,.11); }
.ayli-function { min-height: 58px; font: 600 20px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; }
.ayli-small { max-width: 150px; }
.ayli-help { margin: 8px 0 18px 62px; color: var(--ayli-muted); font-size: 13px; }
.ayli-help code { padding: 1px 5px; border-radius: 5px; background: #eef3f8; color: #2c4774; }

.ayli-options-row { display: flex; gap: 22px; align-items: end; flex-wrap: wrap; }
.ayli-bounds { display: flex; gap: 14px; }
.ayli-bounds[hidden] { display: none !important; }

.ayli-keypad { display: flex; gap: 7px; flex-wrap: wrap; margin: 22px 0 15px; }
.ayli-keypad button, .ayli-examples button {
  border: 1px solid #d7e0ec;
  background: #f7f9fc;
  color: #304665;
  border-radius: 9px;
  padding: 7px 10px;
  cursor: pointer;
  font-weight: 700;
}
.ayli-keypad button:hover, .ayli-examples button:hover { border-color: #aac0e5; background: #edf4ff; color: var(--ayli-blue); }

.ayli-actions { display: flex; gap: 10px; margin-top: 17px; }
.ayli-primary, .ayli-secondary { border-radius: 11px; padding: 12px 18px; font-weight: 850; cursor: pointer; }
.ayli-primary { border: 1px solid var(--ayli-blue); background: var(--ayli-blue); color: #fff; box-shadow: 0 9px 20px rgba(24,63,140,.18); }
.ayli-primary:hover { background: #123574; }
.ayli-secondary { border: 1px solid #ccd7e5; background: #fff; color: #455b78; }

.ayli-examples { display: flex; gap: 7px; flex-wrap: wrap; align-items: center; margin-top: 18px; color: var(--ayli-muted); font-size: 13px; }
.ayli-examples span { font-weight: 800; }

.ayli-side-card { padding: 18px; border: 1px solid #dfe7f2; background: var(--ayli-soft); border-radius: 16px; }
.ayli-side-title { font-weight: 900; margin-bottom: 11px; color: #263c60; }
.ayli-side-card dl { margin: 0; }
.ayli-side-card dl > div { display: flex; justify-content: space-between; gap: 10px; padding: 8px 0; border-bottom: 1px solid #e1e8f1; }
.ayli-side-card dl > div:last-child { border-bottom: 0; }
.ayli-side-card dt { color: var(--ayli-muted); }
.ayli-side-card dd { margin: 0; font: 700 13px ui-monospace, SFMono-Regular, Menlo, monospace; color: #263c60; }

.ayli-message { margin-top: 20px; border-radius: 12px; padding: 12px 14px; font-weight: 700; }
.ayli-message.is-error { background: #fff1f2; color: #a12636; border: 1px solid #f4c4ca; }
.ayli-message.is-success { background: #ecf9f2; color: #16663f; border: 1px solid #bde6ce; }

.ayli-result { border-top: 1px solid var(--ayli-line); margin-top: 27px; padding-top: 27px; }
.ayli-result-head { display: flex; justify-content: space-between; gap: 18px; align-items: start; margin-bottom: 14px; }
.ayli-result-head h2 { margin: 0; font-size: 25px; }
.ayli-status { padding: 6px 10px; border-radius: 999px; background: #e9f7f0; color: var(--ayli-good); font-size: 12px; font-weight: 900; }
.ayli-status.is-warning { background: #fff5df; color: var(--ayli-warn); }

.ayli-result-box { position: relative; display: flex; align-items: center; min-height: 88px; padding: 17px 90px 17px 20px; border-radius: 16px; border: 1px solid #cfdced; background: linear-gradient(180deg,#f9fbfe,#f2f7fc); }
.ayli-result-expression { overflow-wrap: anywhere; font: 700 clamp(20px,3vw,30px)/1.4 Georgia, 'Times New Roman', serif; color: #152e58; }
.ayli-copy { position: absolute; top: 14px; right: 14px; border: 1px solid #cad8e9; background: #fff; color: var(--ayli-blue); padding: 7px 10px; border-radius: 8px; font-weight: 800; cursor: pointer; }

.ayli-result-meta { display: flex; justify-content: space-between; gap: 15px; align-items: center; margin: 10px 0 0; padding: 11px 14px; background: #f7f9fc; border-radius: 10px; color: var(--ayli-muted); }
.ayli-result-meta strong { color: #203b67; font-size: 18px; }

.ayli-result-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-top: 16px; }
.ayli-panel { padding: 18px; border: 1px solid #e0e7f0; border-radius: 15px; background: #fff; }
.ayli-panel h3 { margin: 0 0 10px; color: #203b67; font-size: 17px; }
.ayli-panel p { margin: 0; color: #55657c; line-height: 1.6; }
.ayli-panel ol { margin: 0; padding-left: 20px; color: #4d5e77; }
.ayli-panel li { margin: 7px 0; line-height: 1.5; }
.ayli-check-expression { margin-top: 12px; padding: 10px; border-radius: 9px; background: #f2f6fa; color: #2c4670; overflow-wrap: anywhere; font: 600 13px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; }

.ayli-chart-panel { margin-top: 15px; padding: 16px 18px 18px; }
.ayli-chart-head { display: flex; justify-content: space-between; gap: 12px; align-items: start; }
.ayli-chart-head p { font-size: 13px; }
.ayli-range-control { display: flex; align-items: center; gap: 7px; color: var(--ayli-muted); font-size: 12px; }
.ayli-range-control select { border: 1px solid #cfd8e6; border-radius: 8px; padding: 6px 8px; background: #fff; color: #344a69; }
.ayli-chart { min-height: 330px; margin-top: 12px; border-radius: 12px; overflow: hidden; background: #fbfcfe; border: 1px solid #edf1f6; }
.ayli-chart svg { display: block; width: 100%; height: 330px; }
.ayli-grid-lines line { stroke: #e8edf4; stroke-width: 1; }
.ayli-axes line { stroke: #9aa9bd; stroke-width: 1.2; }
.ayli-function-line { fill: none; stroke: var(--ayli-blue-2); stroke-width: 2.6; stroke-linejoin: round; stroke-linecap: round; }
.ayli-area { fill: rgba(213,31,93,.15); stroke: none; }
.ayli-chart-error { display: grid; place-items: center; min-height: 300px; padding: 20px; color: var(--ayli-muted); text-align: center; }

.ayli-history-section { margin-top: 22px; padding: 24px; }
.ayli-section-heading { display: flex; justify-content: space-between; gap: 16px; align-items: end; }
.ayli-section-heading h2 { margin: 0; font-size: 24px; }
.ayli-text-button { border: 0; background: transparent; padding: 5px; color: var(--ayli-blue); font-weight: 800; cursor: pointer; }
.ayli-history { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; margin-top: 16px; }
.ayli-history-item { display: flex; flex-direction: column; gap: 6px; align-items: stretch; text-align: left; border: 1px solid #dfe7f0; background: #fafbfd; border-radius: 12px; padding: 13px 14px; cursor: pointer; color: #4d5e77; }
.ayli-history-item:hover { border-color: #aabfdf; background: #f5f9ff; }
.ayli-history-item span { font-size: 12px; }
.ayli-history-item strong { color: #233d66; overflow-wrap: anywhere; }
.ayli-empty { grid-column: 1/-1; margin: 6px 0 0; color: var(--ayli-muted); }

.ayli-seo-content { margin-top: 22px; padding: clamp(25px,4vw,44px); }
.ayli-seo-content h2 { margin: 32px 0 10px; font-size: clamp(24px,3vw,31px); color: #1b3764; }
.ayli-seo-content > h2:first-child { margin-top: 0; }
.ayli-seo-content p { color: #53647c; line-height: 1.75; }
.ayli-info-grid, .ayli-methods { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; margin: 18px 0 0; }
.ayli-info-grid article, .ayli-methods article { border: 1px solid #e0e8f1; border-radius: 14px; padding: 18px; background: #fbfcfe; }
.ayli-info-grid h3 { margin: 0 0 7px; color: #284b80; }
.ayli-info-grid p { margin: 0; }
.ayli-methods article { display: flex; flex-direction: column; gap: 5px; }
.ayli-methods strong { color: #244674; }
.ayli-methods span { color: var(--ayli-muted); line-height: 1.55; }
.ayli-example-table-wrap { overflow-x: auto; border: 1px solid #e0e7ef; border-radius: 13px; }
.ayli-example-table { width: 100%; border-collapse: collapse; min-width: 520px; }
.ayli-example-table th, .ayli-example-table td { padding: 12px 15px; text-align: left; border-bottom: 1px solid #e8edf3; }
.ayli-example-table th { background: #f4f7fb; color: #2c466e; }
.ayli-example-table tr:last-child td { border-bottom: 0; }
.ayli-faq { display: grid; gap: 9px; }
.ayli-faq details { border: 1px solid #dfe7f0; border-radius: 12px; padding: 14px 16px; background: #fbfcfe; }
.ayli-faq summary { cursor: pointer; color: #274671; font-weight: 850; }
.ayli-faq details p { margin-bottom: 0; }
.ayli-note { margin-top: 24px; padding: 14px 16px; border-left: 4px solid var(--ayli-blue-2); background: #f2f6fc; border-radius: 8px; }

@media (max-width: 820px) {
  .ayli-hero { padding: 30px 24px; }
  .ayli-hero::after { right: -15px; font-size: 190px; }
  .ayli-calculator { padding: 18px; }
  .ayli-grid { grid-template-columns: 1fr; }
  .ayli-side { display: none; }
  .ayli-help { margin-left: 0; }
  .ayli-result-columns, .ayli-history, .ayli-info-grid, .ayli-methods { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .ayli-wrap { padding-left: 10px; padding-right: 10px; }
  .ayli-hero { border-radius: 18px; }
  .ayli-calculator, .ayli-history-section, .ayli-seo-content { border-radius: 18px; }
  .ayli-expression-row { grid-template-columns: 38px minmax(0,1fr) 27px; gap: 6px; }
  .ayli-integral-symbol { font-size: 46px; }
  .ayli-function { min-height: 52px; font-size: 16px; padding-left: 10px; padding-right: 10px; }
  .ayli-options-row, .ayli-bounds { width: 100%; }
  .ayli-options-row > div, .ayli-bounds > div { flex: 1; }
  .ayli-small { max-width: none; }
  .ayli-actions { flex-direction: column; }
  .ayli-primary, .ayli-secondary { width: 100%; }
  .ayli-result-box { padding-right: 18px; padding-top: 55px; }
  .ayli-copy { left: 14px; right: auto; }
  .ayli-chart-head { flex-direction: column; }
  .ayli-tabs { display: flex; width: 100%; }
  .ayli-tab { flex: 1; padding-left: 8px; padding-right: 8px; }
}

/* v0.3 · procedimiento didáctico */
.ayli-result-columns { grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); }
.ayli-panel-title-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.ayli-panel-title-row h3 { margin-bottom: 0; }
.ayli-v2-badge { display: inline-flex; align-items: center; min-height: 24px; padding: 3px 8px; border-radius: 999px; background: #eef4ff; color: var(--ayli-blue); border: 1px solid #cfddf3; font-size: 11px; font-weight: 900; }
.ayli-method-summary { padding: 14px; margin-bottom: 15px; border: 1px solid #dbe5f2; border-radius: 12px; background: linear-gradient(180deg,#f8fbff,#f4f8fd); }
.ayli-method-summary > span { display: block; margin-bottom: 3px; color: var(--ayli-muted); font-size: 11px; font-weight: 850; text-transform: uppercase; letter-spacing: .06em; }
.ayli-method-summary > strong { display: block; color: #1b3e75; font-size: 15px; line-height: 1.35; }
.ayli-rule-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.ayli-rule-chips span { display: inline-flex; align-items: center; min-height: 25px; padding: 3px 8px; border-radius: 999px; background: #fff; border: 1px solid #d8e2ef; color: #49617f; font-size: 11px; font-weight: 750; }
.ayli-step-list { display: grid; gap: 10px; }
.ayli-step { position: relative; display: grid; grid-template-columns: 31px minmax(0,1fr); gap: 11px; align-items: start; padding: 12px 13px 12px 11px; border: 1px solid #e1e8f1; border-radius: 12px; background: #fff; }
.ayli-step:not(:last-child)::after { content: ''; position: absolute; left: 26px; bottom: -11px; width: 1px; height: 11px; background: #dce5f0; }
.ayli-step-number { display: grid; place-items: center; width: 31px; height: 31px; border-radius: 50%; background: #edf3fc; color: var(--ayli-blue); font-size: 12px; font-weight: 950; }
.ayli-step-body { min-width: 0; }
.ayli-step-title { display: block; margin: 1px 0 3px; color: #253f68; font-size: 13px; }
.ayli-step-body p { margin: 0; color: #5b6b82; font-size: 12.5px; line-height: 1.55; }
.ayli-step-formula { margin-top: 8px; padding: 8px 10px; border-radius: 8px; background: #f5f8fc; border: 1px solid #e5ebf3; color: #183b70; overflow-x: auto; overflow-y: hidden; white-space: nowrap; font: 650 12.5px/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

@media (max-width: 820px) {
  .ayli-result-columns { grid-template-columns: 1fr; }
}

/* v0.3 · impropias, fracciones parciales y notación matemática */
.ayli-bound-help {
  flex-basis: 100%;
  margin: 4px 0 0;
  color: var(--ayli-muted);
  font-size: 12px;
  line-height: 1.45;
}
.ayli-bound-help code {
  padding: 1px 5px;
  border-radius: 5px;
  background: #eef3f8;
  color: #2c4774;
}
.ayli-result-expression .katex-display,
.ayli-step-formula .katex-display,
.ayli-check-expression .katex-display {
  margin: 0;
}
.ayli-result-expression .katex {
  font-size: clamp(1.2em, 2.5vw, 1.55em);
}
.ayli-step-formula .katex,
.ayli-check-expression .katex {
  font-size: 1.05em;
}
.ayli-result-box .katex-display {
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  text-align: left;
}
.ayli-result-box .katex-display > .katex {
  text-align: left;
}

@media (max-width: 560px) {
  .ayli-tabs { gap: 4px; }
  .ayli-tab { font-size: 12px; }
  .ayli-bounds { flex-wrap: wrap; }
  .ayli-bound-help { width: 100%; }
}

/* v0.4 · singularidades finitas, dominio y límites laterales */
.ayli-singularity-diagnostic {
  display: grid;
  grid-template-columns: minmax(150px,.32fr) minmax(0,1fr);
  gap: 15px;
  align-items: center;
  margin-top: 12px;
  padding: 14px 16px;
  border: 1px solid #f0d7b0;
  border-radius: 12px;
  background: #fffaf1;
}
.ayli-singularity-diagnostic[hidden] { display: none !important; }
.ayli-singularity-diagnostic > div:first-child > strong {
  display: block;
  margin-top: 2px;
  color: #6d4a17;
  font-size: 14px;
}
.ayli-singularity-list { display: flex; flex-wrap: wrap; gap: 8px; }
.ayli-singularity-chip {
  display: inline-flex;
  flex-direction: column;
  gap: 1px;
  min-width: 92px;
  padding: 7px 10px;
  border: 1px solid #ead2aa;
  border-radius: 9px;
  background: #fff;
}
.ayli-singularity-chip strong { color: #9a5a08; font: 850 13px/1.25 ui-monospace, SFMono-Regular, Menlo, monospace; }
.ayli-singularity-chip small { color: #7a6a53; font-size: 10.5px; line-height: 1.3; }
.ayli-singularity-chip.is-domain { border-color: #efc6cd; background: #fff7f8; }
.ayli-singularity-chip.is-domain strong { color: #a12636; }
.ayli-singularity-line { stroke: #c87813; stroke-width: 1.6; stroke-dasharray: 6 5; opacity: .9; }

@media (max-width: 650px) {
  .ayli-singularity-diagnostic { grid-template-columns: 1fr; }
}

/* v0.5 · integrales múltiples y motor avanzado */
.ayli-tabs { flex-wrap: wrap; }
.ayli-multiple-options {
  margin-top: 4px;
  padding: 18px;
  border: 1px solid #dbe5f2;
  border-radius: 15px;
  background: linear-gradient(180deg, #f9fbff, #f4f8fd);
}
.ayli-multiple-options[hidden], .ayli-multi-row[hidden], .ayli-range-control[hidden] { display: none !important; }
.ayli-multiple-head { display: flex; justify-content: space-between; gap: 14px; align-items: center; margin-bottom: 6px; }
.ayli-multiple-head strong { display: block; color: #173b73; font-size: 17px; }
.ayli-multi-note { display: inline-flex; align-items: center; padding: 5px 9px; border: 1px solid #cad9ee; border-radius: 999px; background: #fff; color: #49617f; font-size: 11px; font-weight: 850; }
.ayli-multiple-help { margin: 0 0 15px; color: var(--ayli-muted); font-size: 12.5px; line-height: 1.55; }
.ayli-multi-grid { display: grid; gap: 10px; }
.ayli-multi-row { display: grid; grid-template-columns: minmax(130px, .8fr) repeat(2, minmax(110px, .6fr)); gap: 10px; align-items: end; padding: 12px; border: 1px solid #e0e7f1; border-radius: 12px; background: #fff; }
.ayli-multi-row .ayli-small { max-width: none; }
.ayli-multi-order { margin-top: 12px; padding: 9px 11px; border-radius: 9px; background: #eaf2ff; color: #244b84; font: 800 12px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; }
.ayli-multi-visual { min-height: 310px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 9px; padding: 30px; text-align: center; color: #49617f; }
.ayli-multi-visual-symbol { font: 700 76px/1 Georgia, serif; color: var(--ayli-blue); opacity: .92; }
.ayli-multi-visual strong { color: #203d69; font-size: 20px; }
.ayli-multi-visual span { max-width: 720px; padding: 9px 13px; border: 1px solid #dce5f1; border-radius: 10px; background: #fff; color: #314d76; font: 750 13px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace; }
.ayli-multi-visual small { color: var(--ayli-muted); }

@media (max-width: 720px) {
  .ayli-tabs { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); }
  .ayli-tab { width: 100%; }
  .ayli-multi-row { grid-template-columns: 1fr 1fr; }
  .ayli-multi-row > div:first-child { grid-column: 1 / -1; }
}

@media (max-width: 480px) {
  .ayli-multiple-head { align-items: flex-start; flex-direction: column; }
  .ayli-multi-row { grid-template-columns: 1fr; }
  .ayli-multi-row > div:first-child { grid-column: auto; }
}