/* =============================================================
   SOLUTIONS IN INDUSTRIALS STATISTICS — styles.css
   Institutional B2B statistical consulting. Midnight + Champagne.
   ============================================================= */

/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --color-primary:    #233561;
  --color-primary-90: #1a2847;
  --color-primary-70: #2e457e;
  --color-accent:     #b8a278;
  --color-accent-dk:  #9c875e;
  --color-accent-60:  rgba(184, 162, 120, 0.6);
  --color-black:      #11151f;
  --color-ink:        #1a1f2b;
  --color-white:      #ffffff;
  --color-cream:      #f8f7f4;
  --color-cream-2:    #f1eee8;
  --color-line:       rgba(35, 53, 97, 0.14);
  --color-muted:      #5b6378;

  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --serif: "Fraunces", "Georgia", "Times New Roman", serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --container: 1180px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --radius: 14px;
  --radius-sm: 8px;

  --shadow-sm: 0 1px 2px rgba(26, 31, 43, 0.05), 0 4px 16px rgba(26, 31, 43, 0.05);
  --shadow-md: 0 10px 40px rgba(35, 53, 97, 0.10);
  --shadow-lg: 0 24px 70px rgba(35, 53, 97, 0.16);
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
  overflow-x: clip;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, canvas { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; }
p { text-wrap: pretty; }
::selection { background: var(--color-accent); color: var(--color-white); }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* =============================================================
   3. Utilities
   ============================================================= */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.container.narrow { max-width: 880px; }

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--color-primary); color: var(--color-white);
  z-index: 9999; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

/* Bilingual visibility */
html[data-lang="es"] .lang-en { display: none; }
html[data-lang="en"] .lang-es { display: none; }

.is-hidden { display: none !important; }

/* Reveal-on-scroll */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-split] { opacity: 1; transform: none; } /* defensive */

/* =============================================================
   4. Typography
   ============================================================= */
.kicker {
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--color-accent-dk);
  margin-bottom: 1.4rem;
}
.kicker-light { color: var(--color-accent); }

.display {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.9rem, 1.1rem + 3vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  text-wrap: balance;
  color: var(--color-primary);
  max-width: 20ch;
}
.lead {
  font-size: clamp(1.05rem, 1rem + .35vw, 1.3rem);
  line-height: 1.6;
  color: var(--color-muted);
  max-width: 60ch;
}

/* =============================================================
   5. Buttons
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  padding: .8rem 1.5rem;
  border-radius: 100px;
  font-weight: 600; font-size: .94rem;
  letter-spacing: .01em;
  transition: transform .35s var(--ease-out), background .35s var(--ease-out),
              color .35s var(--ease-out), box-shadow .35s var(--ease-out);
  will-change: transform;
}
.btn-sm { padding: .6rem 1.15rem; font-size: .85rem; }
.btn-lg { padding: .95rem 1.9rem; font-size: 1rem; }
.btn-block { width: 100%; }

.btn-primary { background: var(--color-primary); color: var(--color-white); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--color-primary-90); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.btn-ghost { background: transparent; color: var(--color-white); border: 1px solid rgba(255,255,255,.4); }
.btn-ghost:hover { background: rgba(255,255,255,.1); border-color: var(--color-accent); transform: translateY(-2px); }

.section-value .btn-ghost,
.btn-ghost.on-light { color: var(--color-primary); border-color: var(--color-line); }

/* =============================================================
   6. Header / Nav
   ============================================================= */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 1000;
  transition: background .4s var(--ease-out), box-shadow .4s var(--ease-out), border-color .4s var(--ease-out);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.86);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--color-line);
  box-shadow: 0 1px 24px rgba(35,53,97,.05);
}
.nav-inner { display: flex; align-items: center; gap: 1.5rem; min-height: 76px; }

.brand { display: inline-flex; align-items: center; gap: .7rem; color: var(--color-primary); flex-shrink: 0; }
.brand-mark { width: 40px; height: 40px; flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name {
  font-family: var(--sans); font-weight: 700; font-size: .72rem;
  letter-spacing: .12em; text-transform: uppercase; color: var(--color-primary);
  max-width: 13ch;
}
.brand-tagline {
  font-family: var(--mono); font-size: .52rem; letter-spacing: .3em;
  color: var(--color-accent-dk); margin-top: .3rem;
}
/* Header over dark hero: white brand until scrolled */
.site-header:not(.is-scrolled) .brand,
.site-header:not(.is-scrolled) .brand-name { color: var(--color-white); }
.site-header:not(.is-scrolled) .nav-links a { color: rgba(255,255,255,.85); }
.site-header:not(.is-scrolled) .lang-toggle button { color: rgba(255,255,255,.7); }
.site-header:not(.is-scrolled) .lang-toggle button.is-active { color: var(--color-white); }
.site-header:not(.is-scrolled) .lang-sep { color: rgba(255,255,255,.4); }

.nav-links { display: flex; gap: 1.7rem; margin-left: auto; }
.nav-links a {
  font-size: .9rem; font-weight: 500; color: var(--color-ink); position: relative; padding: .2rem 0;
  transition: color .3s var(--ease-out);
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 1.5px;
  background: var(--color-accent); transition: width .35s var(--ease-out);
}
.nav-links a:hover { color: var(--color-accent-dk); }
.nav-links a:hover::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 1rem; }
.lang-toggle { display: inline-flex; align-items: center; gap: .35rem; font-family: var(--mono); font-size: .78rem; }
.lang-toggle button { color: var(--color-muted); font-weight: 500; transition: color .25s; letter-spacing: .05em; }
.lang-toggle button.is-active { color: var(--color-primary); font-weight: 600; }
.lang-sep { color: var(--color-line); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 28px; padding: 4px; }
.nav-toggle span { display: block; height: 2px; width: 100%; background: var(--color-primary); border-radius: 2px; transition: transform .35s var(--ease-out), opacity .25s; }
.site-header:not(.is-scrolled) .nav-toggle span { background: var(--color-white); }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none; flex-direction: column; gap: .3rem;
  padding: 1rem var(--gutter) 2rem;
  background: var(--color-white); border-bottom: 1px solid var(--color-line);
}
.mobile-menu a { padding: .85rem .25rem; font-size: 1.05rem; font-weight: 500; color: var(--color-ink); border-bottom: 1px solid var(--color-cream-2); }
.mobile-menu a.btn { margin-top: 1rem; border-bottom: 0; color: var(--color-white); justify-content: center; }
.mobile-menu.is-open { display: flex; }

/* =============================================================
   7. Hero
   ============================================================= */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center;
  background: radial-gradient(120% 90% at 80% 10%, #2b407a 0%, var(--color-primary) 38%, var(--color-primary-90) 70%, #0e1730 100%);
  color: var(--color-white);
  overflow: hidden;
  padding-top: 76px;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg canvas { position: absolute; inset: 0; width: 100% !important; height: 100% !important; opacity: .5; }
.hero-bg-fade {
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(14,23,48,.92) 0%, rgba(26,40,71,.55) 45%, rgba(26,40,71,.1) 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(60% 50% at 18% 40%, rgba(184,162,120,.14), transparent 70%);
}
.hero-inner { position: relative; z-index: 2; padding-block: 6vh; max-width: 860px; }
.hero-title {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(2.6rem, 1.5rem + 5vw, 5.4rem);
  line-height: 1.02; letter-spacing: -0.02em;
  text-wrap: balance; max-width: 16ch;
  margin-bottom: 1.6rem;
}
.hero-sub {
  font-size: clamp(1.05rem, 1rem + .5vw, 1.35rem);
  line-height: 1.6; color: rgba(255,255,255,.82);
  max-width: 56ch; margin-bottom: 2.4rem;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 1rem; }
.hero-caption {
  margin-top: 3rem; font-family: var(--mono); font-size: .7rem; letter-spacing: .12em;
  text-transform: uppercase; color: rgba(184,162,120,.75);
}
.hero-caption::before { content: "— "; }

/* =============================================================
   8. Sections base
   ============================================================= */
.section { padding-block: clamp(4.5rem, 9vw, 8rem); position: relative; }
.section-head { margin-bottom: clamp(2.5rem, 5vw, 4rem); max-width: 720px; }
.section-value { background: var(--color-white); }
.section-value .display { max-width: 24ch; margin-bottom: 1.6rem; }
.section-services { background: var(--color-cream); }
.section-method { background: var(--color-white); }
.section-diff { background: var(--color-cream); }
.section-metrics { background: var(--color-primary); color: var(--color-white); }
.section-contact { background: var(--color-primary-90); color: var(--color-white); }

/* =============================================================
   9. Services grid
   ============================================================= */
.services-grid {
  display: grid; gap: 1.4rem;
  grid-template-columns: 1fr;
}
.service-card {
  position: relative; background: var(--color-white);
  border: 1px solid var(--color-line); border-radius: var(--radius);
  padding: 2rem 1.8rem;
  display: flex; flex-direction: column;
  transition: transform .45s var(--ease-out), box-shadow .45s var(--ease-out), border-color .45s var(--ease-out);
}
.service-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--color-accent-60); }
.service-num {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .15em;
  color: var(--color-accent-dk); margin-bottom: 1rem;
}
.service-card h3 {
  font-family: var(--serif); font-weight: 500; font-size: 1.3rem;
  color: var(--color-primary); line-height: 1.2; margin-bottom: .7rem; letter-spacing: -.01em;
}
.service-card p { font-size: .95rem; color: var(--color-muted); margin-bottom: 1.4rem; flex-grow: 1; }
.service-chart { position: relative; height: 150px; margin-top: auto; }
.service-chart canvas { width: 100% !important; }

/* DMAIC ring (Service 4) */
.service-visual { margin-top: auto; height: 170px; display: flex; align-items: center; justify-content: center; }
.dmaic-ring { position: relative; width: 150px; height: 150px; }
.dmaic-core {
  position: absolute; inset: 0; margin: auto; width: 70px; height: 70px;
  display: flex; align-items: center; justify-content: center; border-radius: 50%;
  background: var(--color-cream); color: var(--color-primary);
  font-family: var(--mono); font-size: .62rem; letter-spacing: .08em; font-weight: 500;
  box-shadow: inset 0 0 0 1px var(--color-line);
}
.dmaic-step {
  position: absolute; top: 50%; left: 50%; width: 34px; height: 34px; margin: -17px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%; background: var(--color-primary); color: var(--color-white);
  font-family: var(--serif); font-size: .95rem; font-weight: 600;
  transform: rotate(calc(var(--i) * 72deg)) translateY(-58px) rotate(calc(var(--i) * -72deg));
  transition: background .4s var(--ease-out), transform .4s var(--ease-out);
}
.dmaic-step:nth-child(odd) { background: var(--color-accent); }
.service-card:hover .dmaic-step { background: var(--color-primary-70); }
.service-card:hover .dmaic-step:nth-child(odd) { background: var(--color-accent-dk); }

/* KPIs (Service 6) */
.service-visual.kpis { flex-direction: column; align-items: flex-start; justify-content: center; gap: .55rem; height: auto; }
.kpi { display: flex; flex-direction: column; }
.kpi-val { font-family: var(--serif); font-size: 1.7rem; font-weight: 600; color: var(--color-primary); line-height: 1; }
.kpi-label { font-size: .8rem; color: var(--color-muted); }
.kpi-foot { font-family: var(--mono); font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; color: var(--color-accent-dk); margin-top: .4rem; }

/* =============================================================
   10. Methodology timeline
   ============================================================= */
.timeline {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem; position: relative; counter-reset: tl;
}
.timeline::before {
  content: ""; position: absolute; top: 11px; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-line) 100%);
}
.tl-step { position: relative; padding-top: 2.6rem; }
.tl-node {
  position: absolute; top: 3px; left: 0; width: 18px; height: 18px; border-radius: 50%;
  background: var(--color-white); border: 3px solid var(--color-accent);
  transition: transform .4s var(--ease-out), background .4s var(--ease-out);
}
.tl-step.is-visible .tl-node { background: var(--color-accent); transform: scale(1.05); }
.tl-index { font-family: var(--mono); font-size: .8rem; color: var(--color-accent-dk); letter-spacing: .1em; }
.tl-step h3 {
  font-family: var(--serif); font-weight: 500; font-size: 1.18rem; color: var(--color-primary);
  margin: .5rem 0 .6rem; line-height: 1.2;
}
.tl-step p { font-size: .92rem; color: var(--color-muted); }

/* =============================================================
   11. Differentiator
   ============================================================= */
.diff-grid { display: grid; grid-template-columns: 1fr; gap: clamp(2.5rem, 5vw, 4.5rem); align-items: start; }
.diff-col-text .display { margin: 1.4rem 0; }
.diff-col-text p + p { margin-top: 1.2rem; }
.diff-col-text .lead { color: var(--color-ink); }
.diff-points { display: grid; gap: 1.2rem; }
.diff-points li {
  background: var(--color-white); border: 1px solid var(--color-line); border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm); padding: 1.4rem 1.5rem;
  transition: transform .4s var(--ease-out), box-shadow .4s var(--ease-out);
}
.diff-points li:hover { transform: translateX(4px); box-shadow: var(--shadow-md); }
.diff-points h3 { font-family: var(--serif); font-weight: 600; font-size: 1.1rem; color: var(--color-primary); margin-bottom: .35rem; }
.diff-points p { font-size: .92rem; color: var(--color-muted); }

/* =============================================================
   12. Metrics / credentials
   ============================================================= */
.section-metrics .display, .section-contact .display { color: var(--color-white); }
.metrics-grid { display: grid; grid-template-columns: 1fr; gap: clamp(2.5rem, 5vw, 4rem); align-items: center; }
.metrics-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.4rem; }
.stat { border-top: 1px solid rgba(255,255,255,.18); padding-top: 1.2rem; }
.stat-val { display: block; font-family: var(--serif); font-size: clamp(2.6rem, 5vw, 3.6rem); font-weight: 600; line-height: 1; color: var(--color-accent); }
.stat-label { display: block; margin-top: .6rem; font-size: .9rem; color: rgba(255,255,255,.78); max-width: 24ch; }
.stat-wide { grid-column: span 2; }
.stat-badge-title { font-family: var(--mono); font-size: .7rem; letter-spacing: .18em; text-transform: uppercase; color: var(--color-accent); }
.stat-wide p { margin-top: .5rem; font-size: 1.05rem; color: var(--color-white); }
.badges { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .8rem; }
.badges li {
  font-size: .82rem; font-weight: 500; padding: .4rem .9rem; border-radius: 100px;
  background: rgba(255,255,255,.07); border: 1px solid rgba(184,162,120,.4); color: var(--color-white);
}
.metrics-donut { display: flex; flex-direction: column; align-items: center; }
.donut-wrap { position: relative; width: 100%; max-width: 320px; height: 320px; }
.metrics-donut figcaption { margin-top: 1.2rem; font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: rgba(184,162,120,.85); text-align: center; }

/* =============================================================
   13. Contact form
   ============================================================= */
.contact-grid { display: grid; grid-template-columns: 1fr; gap: clamp(2.5rem, 5vw, 4rem); align-items: start; }
.section-contact .lead { color: rgba(255,255,255,.82); }
.contact-form {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem;
  background: var(--color-white); border-radius: var(--radius);
  padding: clamp(1.5rem, 3vw, 2.4rem); box-shadow: var(--shadow-lg);
}
.field { display: flex; flex-direction: column; }
.field-full { grid-column: 1 / -1; }
.field label { font-size: .82rem; font-weight: 600; color: var(--color-primary); margin-bottom: .4rem; }
.field input, .field textarea {
  font: inherit; font-size: .95rem; color: var(--color-ink);
  padding: .75rem .9rem; border: 1px solid var(--color-line); border-radius: var(--radius-sm);
  background: var(--color-cream); transition: border-color .25s, background .25s, box-shadow .25s;
  width: 100%; resize: vertical;
}
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--color-accent); background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(184,162,120,.18);
}
.field.has-error input, .field.has-error textarea { border-color: #c0392b; background: #fdf3f2; }
.field-error { font-size: .76rem; color: #c0392b; margin-top: .3rem; min-height: 1em; }
.form-note { font-size: .8rem; color: var(--color-muted); margin-top: .8rem; text-align: center; }
.form-note a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }

/* =============================================================
   14. Testimonials (structure only; hidden by default)
   ============================================================= */
.section-testimonials { background: var(--color-cream); }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.testimonial-card { background: var(--color-white); border: 1px solid var(--color-line); border-radius: var(--radius); padding: 2rem; }
.testimonial-card cite { display: block; margin-top: 1.2rem; font-style: normal; font-weight: 600; color: var(--color-primary); }

/* =============================================================
   15. Footer
   ============================================================= */
.site-footer { background: var(--color-black); color: rgba(255,255,255,.7); padding-block: 3.5rem; }
.footer-inner { display: grid; grid-template-columns: 1fr; gap: 2rem; align-items: start; }
.footer-brand { display: flex; flex-direction: column; gap: .2rem; color: var(--color-white); }
.footer-brand .brand-mark { width: 46px; height: 46px; margin-bottom: .6rem; }
.footer-name { font-weight: 700; font-size: .8rem; letter-spacing: .1em; text-transform: uppercase; }
.footer-tag { font-family: var(--mono); font-size: .58rem; letter-spacing: .28em; color: var(--color-accent); margin-top: .3rem; }
.footer-contact { display: flex; flex-direction: column; gap: .5rem; }
.footer-contact a { color: rgba(255,255,255,.85); font-size: .95rem; transition: color .25s; }
.footer-contact a:hover { color: var(--color-accent); }
.footer-meta p { font-size: .85rem; line-height: 1.7; }
.footer-legal { margin-top: .8rem; font-size: .78rem; color: rgba(255,255,255,.5); }
.footer-legal a { color: var(--color-accent); margin-left: .4rem; }
.footer-legal a:hover { text-decoration: underline; }

/* =============================================================
   15b. Legal / privacy page
   ============================================================= */
.legal-main { padding-top: clamp(7rem, 12vh, 9rem); padding-bottom: clamp(4rem, 8vw, 6rem); }
.legal-title { font-family: var(--serif); font-weight: 400; font-size: clamp(2rem, 1.3rem + 3vw, 3.2rem); color: var(--color-primary); line-height: 1.1; margin: .6rem 0 .4rem; letter-spacing: -.015em; }
.legal-updated { font-family: var(--mono); font-size: .8rem; color: var(--color-accent-dk); letter-spacing: .05em; margin-bottom: 2.5rem; }
.legal-main h2 { font-family: var(--serif); font-weight: 500; font-size: 1.25rem; color: var(--color-primary); margin: 2.2rem 0 .7rem; line-height: 1.25; }
.legal-main p { color: var(--color-ink); margin-bottom: .9rem; max-width: 70ch; }
.legal-list { margin: 0 0 1.1rem; padding-left: 0; }
.legal-list li { position: relative; padding-left: 1.4rem; margin-bottom: .45rem; color: var(--color-ink); max-width: 68ch; }
.legal-list li::before { content: ""; position: absolute; left: 0; top: .6em; width: 7px; height: 7px; border-radius: 50%; background: var(--color-accent); }
.legal-main a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }
.legal-back { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--color-line); }
.legal-back a { font-weight: 600; color: var(--color-primary); text-decoration: none; }
.legal-back a:hover { color: var(--color-accent-dk); }

/* =============================================================
   16. Toast
   ============================================================= */
.toast {
  position: fixed; bottom: 1.5rem; left: 50%;
  transform: translate(-50%, 160%);
  background: var(--color-primary); color: var(--color-white);
  padding: .9rem 1.4rem; border-radius: 100px; font-size: .9rem; font-weight: 500;
  box-shadow: var(--shadow-lg); z-index: 2000; max-width: 90vw; text-align: center;
  transition: transform .5s var(--ease-out); border: 1px solid rgba(184,162,120,.4);
}
.toast.is-visible { transform: translate(-50%, 0); }

/* =============================================================
   17. Responsive
   ============================================================= */
@media (min-width: 600px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 720px) {
  .footer-inner { grid-template-columns: 1.4fr 1fr 1.4fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 960px) {
  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .diff-grid { grid-template-columns: 1.05fr .95fr; }
  .metrics-grid { grid-template-columns: 1.3fr 1fr; }
}
@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-actions .btn-sm { display: none; }
  /* Timeline -> vertical */
  .timeline { grid-template-columns: 1fr; gap: 0; }
  .timeline::before { top: 0; bottom: 0; left: 8px; right: auto; width: 2px; height: auto; background: linear-gradient(180deg, var(--color-accent), var(--color-line)); }
  .tl-step { padding-top: 0; padding-left: 2.4rem; padding-bottom: 2.2rem; }
  .tl-node { top: 4px; left: 0; }
}
@media (max-width: 600px) {
  .metrics-stats { grid-template-columns: 1fr; }
  .stat-wide { grid-column: span 1; }
  .contact-form { grid-template-columns: 1fr; }
  .hero-cta .btn { width: 100%; }
}

/* =============================================================
   18. Reduced motion — only intrusive effects
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .dmaic-step { transition: none; }
}