/* =============================================================
   ResuelveMate — hoja de estilos única
   1 Tokens · 2 Reset · 3 Utilidades · 4 Botones · 5 Cabecera
   6 Anuncios · 7 Hero · 8 Herramienta (tabs, paneles, teclado)
   9 Resultado y pasos · 10 Matrices · 11 Renderer matemático
   12 Historial · 13 Contenido · 14 FAQ · 15 Más herramientas
   16 Footer · 17 Responsive · 18 Reduced-motion · 19 Claro
   ============================================================= */

/* ===================== 1. TOKENS (oscuro por defecto) ===================== */
:root {
  --bg: #0a0c11;
  --surface: #12151d;
  --surface-2: #191d28;
  --surface-3: #1f2431;
  --ink: #f4f6fb;
  --ink-2: #c7cddb;
  --muted: #8a93a8;
  --line: #262c3a;
  --line-2: #1c2129;
  --accent: #8b5cf6;
  --accent-2: #22d3ee;
  --accent-3: #fbbf24;
  --accent-ink: #ffffff;
  --accent-soft: rgba(139, 92, 246, .16);
  --accent2-soft: rgba(34, 211, 238, .14);
  --ok: #34d399;
  --ok-soft: rgba(52, 211, 153, .14);
  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, .12);
  --bad: #f87171;
  --bad-soft: rgba(248, 113, 113, .14);

  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow: 0 4px 18px -4px rgba(0, 0, 0, .45), 0 1px 3px rgba(0, 0, 0, .3);
  --shadow-lg: 0 28px 64px -20px rgba(0, 0, 0, .6), 0 6px 20px -8px rgba(0, 0, 0, .4);
  --ease-out: cubic-bezier(.16, 1, .3, 1);

  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --gutter: clamp(1rem, 4vw, 2rem);
  --maxw: 1180px;
}

/* ===================== 2. RESET ===================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 5rem; tab-size: 2; }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  background-image:
    radial-gradient(720px 460px at 92% -10%, color-mix(in srgb, var(--accent) 20%, transparent), transparent 60%),
    radial-gradient(600px 420px at -8% 12%, color-mix(in srgb, var(--accent-2) 14%, transparent), transparent 60%),
    radial-gradient(560px 460px at 100% 65%, color-mix(in srgb, var(--accent-3) 8%, transparent), transparent 60%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}
img, svg, canvas, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3 { text-wrap: balance; line-height: 1.12; letter-spacing: -.01em; font-weight: 700; font-family: var(--display); }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; border-radius: 6px; }
details > summary { cursor: pointer; list-style: none; }
details > summary::-webkit-details-marker { display: none; }

/* ===================== 3. UTILIDADES ===================== */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.container + .container, .container + .section-tint { margin-top: clamp(2rem, 5vw, 3.5rem); }
.skip-link {
  position: fixed; top: -100px; left: 1rem; z-index: 999;
  padding: .6rem 1rem; background: var(--accent); color: #fff;
  border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }
.noscript-note {
  margin-bottom: 1rem; padding: 1rem 1.15rem; border-radius: var(--radius);
  background: var(--warn-soft); border: 1px solid var(--warn); color: var(--warn);
}

/* ===================== 4. BOTONES ===================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .75rem 1.2rem; border-radius: var(--radius-sm);
  font-weight: 700; font-size: .93rem;
  transition: background .2s var(--ease-out), color .2s var(--ease-out), border-color .2s var(--ease-out), transform .15s var(--ease-out);
}
.btn-solve {
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, var(--accent-2)));
  color: #fff; box-shadow: 0 8px 20px -8px color-mix(in srgb, var(--accent) 70%, transparent);
  white-space: nowrap;
}
.btn-solve:hover { transform: translateY(-1px); }
.btn-solve--wide { width: 100%; margin-top: 1rem; padding-block: .85rem; }
.btn-clear-history { font-size: .78rem; color: var(--muted); font-weight: 600; }
.btn-clear-history:hover { color: var(--bad); }

/* ===================== 5. CABECERA ===================== */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.6) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: .55rem; font-weight: 700; letter-spacing: -.01em; }
.brand-mark {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff;
}
.brand-name { font-size: 1.08rem; font-family: var(--display); }
.site-nav { display: none; gap: 1.4rem; font-size: .9rem; font-weight: 500; color: var(--ink-2); }
.site-nav a { padding: .25rem 0; border-bottom: 2px solid transparent; transition: border-color .2s var(--ease-out), color .2s var(--ease-out); }
.site-nav a:hover { color: var(--accent-2); border-bottom-color: var(--accent-2); }
@media (min-width: 720px) { .site-nav { display: flex; } }

/* ===================== 6. ANUNCIOS ===================== */
.ad-slot {
  margin-block: clamp(1.5rem, 4vw, 2.5rem);
  display: flex; align-items: center; justify-content: center; flex-direction: column; gap: .3rem;
  border: 1px dashed var(--line); border-radius: var(--radius);
  color: var(--muted); font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  background: var(--surface-2); margin-inline: auto; overflow: hidden;
}
.ad-slot::after {
  content: "Espacio reservado · sin anuncios activos aún";
  font: 500 .66rem/1 var(--sans); text-transform: none; letter-spacing: 0; color: var(--muted); opacity: .75;
}
.ad-slot--banner { width: 100%; max-width: 970px; min-height: 90px; }
.ad-slot--infeed { width: 100%; min-height: 120px; }
.ad-slot--sidebar { width: 100%; min-height: 250px; margin-top: 1.25rem; }
[data-result-ad] { margin-block: 1.25rem; }

/* ===================== 7. HERO ===================== */
.hero { padding-block: clamp(1.75rem, 5vw, 3rem) 1.25rem; position: relative; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .35rem .75rem; border-radius: 99px;
  background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  color: var(--accent-2); font-size: .78rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .05em; margin-bottom: 1rem;
}
.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 10px color-mix(in srgb, var(--accent-2) 80%, transparent); }
.hero h1 { font-size: clamp(1.9rem, 4.6vw, 2.9rem); max-width: 22ch; }
.hero-sub { margin-top: .8rem; max-width: 64ch; font-size: clamp(1rem, 1.7vw, 1.08rem); color: var(--muted); }
.hero-sub strong { color: var(--ink); font-weight: 700; }

/* ===================== 8. HERRAMIENTA ===================== */
.tool-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: clamp(1.1rem, 3vw, 1.9rem);
  overflow: hidden;
}
.tool-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
}

.mode-tabs { display: flex; gap: .4rem; overflow-x: auto; padding-bottom: .3rem; margin-bottom: 1.1rem; }
.mode-tab {
  display: inline-flex; align-items: center; gap: .4rem; white-space: nowrap;
  padding: .55rem .9rem; border-radius: 99px; font-weight: 600; font-size: .87rem;
  background: var(--surface-2); border: 1px solid var(--line); color: var(--ink-2);
  transition: background .2s var(--ease-out), color .2s var(--ease-out), border-color .2s var(--ease-out);
}
.mode-tab:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); color: var(--ink); }
.mode-tab.is-active { background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, var(--accent-2))); border-color: transparent; color: #fff; }

.tool-grid { display: grid; gap: 1.75rem; }
@media (min-width: 900px) { .tool-grid { grid-template-columns: minmax(0, 1fr) minmax(240px, .78fr); align-items: start; } }

.mode-panel { display: none; }
.mode-panel.is-active { display: block; }

.sub-tabs { display: flex; gap: .35rem; flex-wrap: wrap; margin-bottom: .9rem; }
.sub-tab {
  padding: .45rem .8rem; border-radius: var(--radius-sm); font-size: .82rem; font-weight: 600;
  background: var(--surface-2); border: 1px solid var(--line); color: var(--muted);
  transition: color .2s var(--ease-out), border-color .2s var(--ease-out);
}
.sub-tab.is-active { color: var(--accent-2); border-color: var(--accent-2); background: var(--accent2-soft); }
.sub-panel { display: none; }
.sub-panel.is-active { display: block; }

.field-label { display: block; font-size: .85rem; font-weight: 600; color: var(--ink-2); margin-bottom: .4rem; }
.expr-input-row { display: flex; gap: .6rem; flex-wrap: wrap; }
.expr-input {
  flex: 1 1 240px; min-width: 0;
  padding: .8rem .95rem; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--surface-2); color: var(--ink); font-family: var(--mono); font-size: 1rem;
  transition: border-color .2s var(--ease-out), box-shadow .2s var(--ease-out);
}
.expr-input:focus { border-color: var(--accent-2); box-shadow: 0 0 0 3px var(--accent2-soft); outline: none; }
.expr-preview {
  margin-top: .7rem; padding: .8rem 1rem; border-radius: var(--radius-sm);
  background: var(--surface-3); border: 1px solid var(--line-2); min-height: 2.6rem;
  font-size: 1.15rem; overflow-x: auto;
}
.expr-preview:empty::before { content: "…"; color: var(--muted); }

.check-row { display: flex; align-items: center; gap: .6rem; margin: 1rem 0 .4rem; font-weight: 600; font-size: .88rem; cursor: pointer; color: var(--ink-2); }
.check-row input { width: 17px; height: 17px; accent-color: var(--accent-2); }
.point-input {
  padding: .6rem .8rem; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--surface-2); font-variant-numeric: tabular-nums; width: 8rem;
}

.shape-select {
  width: 100%; padding: .75rem .9rem; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--surface-2); color: var(--ink); font-weight: 600; margin-bottom: .9rem;
}
.shape-inputs { display: grid; gap: .8rem; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.shape-field { display: flex; flex-direction: column; gap: .3rem; }
.shape-field label { font-size: .82rem; color: var(--muted); font-weight: 600; }
.shape-field input {
  padding: .65rem .8rem; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--surface-2); font-variant-numeric: tabular-nums;
}

/* teclado matemático visual */
.math-keyboard {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: .4rem; margin-top: 1.1rem;
}
.math-keyboard button {
  padding: .6rem .3rem; border-radius: var(--radius-sm); background: var(--surface-2);
  border: 1px solid var(--line); font-family: var(--mono); font-size: .95rem; font-weight: 600; color: var(--ink-2);
  transition: background .15s var(--ease-out), border-color .15s var(--ease-out), color .15s var(--ease-out), transform .1s var(--ease-out);
}
.math-keyboard button:hover { border-color: var(--accent-2); color: var(--accent-2); background: var(--accent2-soft); }
.math-keyboard button:active { transform: scale(.94); }
.math-keyboard .kb-wide { grid-column: span 3; background: var(--surface-3); color: var(--ink); }
.kb-frac { display: inline-flex; flex-direction: column; align-items: center; line-height: 1; font-size: .8rem; }
.kb-frac span { border-top: 1.5px solid currentColor; padding-top: 2px; margin-top: 2px; }

/* ===================== 9. RESULTADO Y PASOS ===================== */
.result-area { margin-top: 1.4rem; }
.result-summary {
  padding: 1.1rem 1.2rem; border-radius: var(--radius); background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent); font-size: 1.3rem; overflow-x: auto;
}
.result-summary .result-label { display: block; font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--accent-2); margin-bottom: .4rem; }
.result-summary .result-note { display: block; margin-top: .5rem; font-size: .82rem; color: var(--muted); font-weight: 500; }

.steps-area { margin-top: 1.5rem; }
.steps-title { font-size: 1.15rem; margin-bottom: .8rem; }
.steps-list { list-style: none; display: grid; gap: .6rem; counter-reset: step; }
.step-item { display: flex; gap: .8rem; padding: .9rem 1rem; border-radius: var(--radius); background: var(--surface-2); border: 1px solid var(--line-2); }
.step-num {
  flex-shrink: 0; width: 1.8rem; height: 1.8rem; border-radius: 50%; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent-2), var(--accent)); color: #06131a; font-weight: 800; font-size: .85rem;
}
.step-body { min-width: 0; flex: 1; }
.step-label {
  display: inline-block; font-size: .8rem; font-weight: 700; color: var(--accent-3);
  background: rgba(251, 191, 36, .1); padding: .15rem .55rem; border-radius: 99px; margin-bottom: .5rem;
}
.step-expr { font-size: 1.1rem; overflow-x: auto; padding-block: .1rem; }
.step-note { margin-top: .4rem; font-size: .84rem; color: var(--muted); }
.step-matrix-wrap { margin-top: .5rem; overflow-x: auto; }

.error-area {
  margin-top: 1.2rem; padding: 1rem 1.1rem; border-radius: var(--radius);
  background: var(--bad-soft); border: 1px solid var(--bad); color: var(--bad); font-weight: 500;
}

.privacy-badge { margin-top: 1.3rem; font-size: .86rem; color: var(--ok); }
.honest-limit { margin-top: .4rem; font-size: .8rem; color: var(--muted); line-height: 1.55; }

/* ===================== 10. MATRICES ===================== */
.matrix-editors { display: grid; gap: 1rem; margin-top: .8rem; }
.matrix-editor[hidden] { display: none; }
.matrix-dims { display: flex; align-items: center; gap: .8rem; font-size: .84rem; font-weight: 600; color: var(--ink-2); margin-bottom: .55rem; flex-wrap: wrap; }
.matrix-dims label { display: inline-flex; align-items: center; gap: .35rem; font-weight: 500; color: var(--muted); }
.matrix-dims input[type="number"] { width: 3.4rem; padding: .3rem .4rem; border: 1px solid var(--line); border-radius: 7px; background: var(--surface-2); }
.matrix-grid-edit { display: inline-grid; gap: .4rem; }
.matrix-grid-edit input {
  width: 3.6rem; padding: .5rem .3rem; text-align: center; border: 1px solid var(--line); border-radius: 8px;
  background: var(--surface-2); font-variant-numeric: tabular-nums;
}
.matrix-scalar[hidden] { display: none; }
.matrix-scalar input { width: 6rem; padding: .5rem .7rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface-2); margin-top: .3rem; }

/* ===================== 11. RENDERER MATEMÁTICO ===================== */
.m-var, .m-const { font-style: italic; font-family: var(--display); }
.m-num { font-variant-numeric: tabular-nums; }
.m-op { color: var(--accent-2); padding-inline: .1em; }
.m-neg { color: var(--accent-2); }
.m-paren { color: var(--muted); }
.m-func { font-style: normal; color: var(--accent-3); }
.m-frac { display: inline-flex; flex-direction: column; align-items: center; vertical-align: middle; margin: 0 .15em; line-height: 1.3; }
.m-frac-num, .m-frac-den { padding-inline: .2em; }
.m-frac-num { border-bottom: 1.5px solid currentColor; padding-bottom: .08em; }
.m-frac-den { padding-top: .08em; }
.m-sqrt { display: inline-flex; align-items: flex-start; }
.m-sqrt-rad { font-size: 1.1em; margin-right: -.05em; }
.m-sqrt-content { border-top: 1.5px solid currentColor; padding: 0 .15em; margin-top: .32em; }
.m-sup { font-size: .68em; vertical-align: super; }
.m-abs { padding-inline: .05em; }
.m-matrix { display: inline-flex; align-items: stretch; vertical-align: middle; margin-inline: .2em; }
.m-mbracket { width: 7px; border: 2px solid currentColor; }
.m-mbracket-l { border-right: 0; border-radius: 4px 0 0 4px; }
.m-mbracket-r { border-left: 0; border-radius: 0 4px 4px 0; }
.m-mgrid { display: grid; gap: .1em .6em; padding: .3em .4em; }
.m-mrow { display: contents; }
.m-mcell { text-align: center; font-variant-numeric: tabular-nums; }

/* ===================== 12. HISTORIAL ===================== */
.tool-side { display: flex; flex-direction: column; }
.history-panel {
  background: var(--surface-2); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 1rem 1.1rem; max-height: 420px; display: flex; flex-direction: column;
}
.history-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: .7rem; }
.history-head h2 { font-size: .95rem; }
.history-list { list-style: none; display: grid; gap: .5rem; overflow-y: auto; }
.history-empty { font-size: .82rem; color: var(--muted); }
.history-item {
  padding: .6rem .7rem; border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--line-2);
  cursor: pointer; transition: border-color .15s var(--ease-out);
}
.history-item:hover { border-color: var(--accent-2); }
.history-item .h-mode { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--accent-2); }
.history-item .h-expr { display: block; font-family: var(--mono); font-size: .83rem; color: var(--ink-2); margin-top: .2rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ===================== 13. CONTENIDO ===================== */
.section-tint {
  background: var(--surface-2);
  border-block: 1px solid var(--line-2);
  padding-block: clamp(2rem, 5vw, 3.5rem);
  margin-top: clamp(2rem, 5vw, 3.5rem);
}
.section-tint + .container { margin-top: clamp(2rem, 5vw, 3.5rem); }
.prose-section h2, .container > h2 { font-size: clamp(1.4rem, 2.8vw, 1.9rem); margin-bottom: .9rem; }
.prose-section p { max-width: 74ch; color: var(--ink-2); margin-bottom: .9rem; }
.how-it-works { list-style: none; display: grid; gap: .9rem; margin-bottom: 1.25rem; counter-reset: step; }
.how-it-works li { position: relative; padding-left: 2.4rem; color: var(--ink-2); max-width: 70ch; }
.how-it-works li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: -.1rem;
  width: 1.7rem; height: 1.7rem; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 700; font-size: .85rem;
  display: grid; place-items: center;
}

/* ===================== 14. FAQ ===================== */
.faq-list { display: grid; gap: .6rem; }
.faq-item {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: .95rem 1.1rem; box-shadow: var(--shadow-sm);
  transition: border-color .2s var(--ease-out);
}
.faq-item:hover { border-color: color-mix(in srgb, var(--accent-2) 45%, var(--line)); }
.faq-item summary { font-weight: 600; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.faq-item summary::after { content: "+"; font-size: 1.3rem; color: var(--accent-2); transition: transform .2s var(--ease-out); flex-shrink: 0; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { margin-top: .7rem; color: var(--ink-2); }

/* ===================== 15. MÁS HERRAMIENTAS ===================== */
.more-tools-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.more-tool-card {
  display: block; padding: 1.1rem; border-radius: var(--radius); border: 1px solid var(--line);
  background: var(--surface); box-shadow: var(--shadow-sm);
  transition: border-color .2s var(--ease-out), transform .2s var(--ease-out), box-shadow .2s var(--ease-out);
}
.more-tool-card:hover { border-color: var(--accent-2); transform: translateY(-2px); box-shadow: var(--shadow); }
.more-tool-name { display: block; font-weight: 700; margin-bottom: .3rem; }
.more-tool-desc { display: block; font-size: .88rem; color: var(--muted); }

/* ===================== 16. FOOTER ===================== */
.site-footer { margin-top: clamp(2.5rem, 6vw, 4rem); padding-block: 1.75rem; border-top: 1px solid var(--line); }
.footer-inner { display: flex; flex-wrap: wrap; gap: .9rem; justify-content: space-between; align-items: center; font-size: .85rem; color: var(--muted); }
.footer-credits { margin-top: .2rem; font-size: .78rem; }
.footer-nav { display: flex; gap: 1.1rem; }
.footer-nav a:hover { color: var(--accent-2); }

/* ===================== 17. RESPONSIVE ===================== */
@media (max-width: 719px) {
  .math-keyboard { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 539px) {
  .expr-input-row { flex-direction: column; }
  .btn-solve { width: 100%; }
}

/* ===================== 18. REDUCED MOTION ===================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* ===================== 19. TEMA CLARO (si el sistema lo pide) ===================== */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6fb;
    --surface: #ffffff;
    --surface-2: #f0f1f8;
    --surface-3: #e7e9f4;
    --ink: #14161f;
    --ink-2: #3c4152;
    --muted: #676f85;
    --line: #dcdfec;
    --line-2: #e7e9f4;
    --accent-ink: #ffffff;
    --shadow: 0 4px 16px -4px rgba(20, 22, 40, .1), 0 1px 3px rgba(20, 22, 40, .06);
    --shadow-lg: 0 24px 56px -20px rgba(20, 22, 40, .18), 0 4px 16px -6px rgba(20, 22, 40, .08);
  }
  .step-num { color: #fff; }
}