/**
 * Duolingo Dogs — Caso de estudio UX · Design system propio.
 * Fuentes: Nunito, JetBrains Mono (encoladas por functions.php).
 *
 * @package Viruca
 */

/* ── Variables — tema claro por defecto (blanco roto + verde Duolingo) ── */
:root {
  --bg:          #f6f9f1;
  --bg-elev:     #ffffff;
  --bg-elev-2:   #eaf5dc;
  --nav-bg:      rgba(246,249,241,.90);
  --line:        rgba(20,40,10,.10);
  --line-soft:   rgba(20,40,10,.06);
  --text:        #1c2317;
  --text-dim:    #54604a;
  --text-faint:  #8b9682;
  --duo-green:       #58cc02;
  --duo-green-soft:  #3f9900;
  --duo-green-glow:  rgba(88,204,2,.20);
  --duo-blue:        #1899d6;
  --duo-yellow:      #c79f00;
  --duo-red:         #e0383d;
  --radius:      14px;
}

/* ── Tema oscuro (toggle) ────────────────────────────────────── */
:root[data-theme="dark"] {
  --bg:          #0a0c0f;
  --bg-elev:     #13161b;
  --bg-elev-2:   #181c22;
  --nav-bg:      rgba(10,12,15,.88);
  --line:        rgba(255,255,255,.09);
  --line-soft:   rgba(255,255,255,.05);
  --text:        #f3f4f6;
  --text-dim:    #9aa1ab;
  --text-faint:  #5d636d;
  --duo-green-soft:  #7dd63c;
  --duo-green-glow:  rgba(88,204,2,.22);
  --duo-blue:        #1cb0f6;
  --duo-yellow:      #ffd900;
  --duo-red:         #ff4b4b;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; }
body  {
  background: var(--bg);
  color: var(--text);
  font-family: 'Nunito', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.mono { font-family: 'JetBrains Mono', monospace; }
img   { max-width: 100%; display: block; }
a     { color: inherit; text-decoration: none; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 32px; }
::selection { background: var(--duo-green); color: #fff; }

/* ── Nav ────────────────────────────────────────────────────── */
header.duo-nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
  transition: background .25s ease;
}
.duo-navbar { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.duo-brand  {
  display: flex; align-items: center;
  color: var(--duo-green);
}
:root[data-theme="dark"] .duo-brand { color: #ffffff; }
.duo-logo-svg {
  height: 24px;
  width: auto;
  display: block;
  transition: opacity .2s ease;
}
.duo-brand:hover .duo-logo-svg { opacity: .8; }
@media (max-width: 480px) {
  .duo-logo-svg { height: 20px; }
}
.duo-brand-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--duo-green);
  box-shadow: 0 0 0 4px var(--duo-green-glow);
}
.duo-navlinks { display: flex; align-items: center; gap: 28px; font-size: 14px; color: var(--text-dim); }
.duo-navlinks a:hover { color: var(--text); }
.duo-navlinks .btn {
  color: var(--text); border: 1px solid var(--line); padding: 9px 18px; border-radius: 99px;
  margin-left: 8px; white-space: nowrap;
}
.duo-navlinks .btn:hover { border-color: var(--duo-green-soft); }
@media (max-width: 720px) { .duo-navlinks a:not(.btn) { display: none; } }

/* ── Controles: idioma ────────────────────────────────────────── */
.duo-controls { display: flex; align-items: center; gap: 12px; margin-left: 12px; }
.duo-lang-switcher {
  display: flex; align-items: center; gap: 6px;
  font-family: 'JetBrains Mono'; font-size: 12px;
}
.duo-lang-btn {
  background: none; border: none; cursor: pointer; padding: 4px 2px;
  color: var(--text-faint); font-family: 'JetBrains Mono'; font-size: 12px;
  font-weight: 700; letter-spacing: .03em; transition: color .15s ease;
}
.duo-lang-btn:hover { color: var(--text); }
.duo-lang-btn.is-active { color: var(--duo-green-soft); }
.duo-lang-sep { color: var(--line); font-size: 12px; }
@media (max-width: 720px) { .duo-controls { margin-left: 0; } }

/* ── Toggle tema — FAB fijo abajo-izquierda, igual que el resto de la web ── */
.duo-theme-toggle-fab {
  position: fixed;
  bottom: 28px;
  left: 28px;
  z-index: 60;
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1px solid var(--line); background: var(--bg-elev);
  color: var(--text-dim); display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: 15px;
  box-shadow: 0 4px 18px rgba(0,0,0,.2);
  transition: border-color .15s ease, color .15s ease, box-shadow .15s ease;
}
.duo-theme-toggle-fab:hover { border-color: var(--duo-green-soft); color: var(--duo-green-soft); }

/* ── Hero ───────────────────────────────────────────────────── */
.duo-hero { padding: 96px 0 60px; position: relative; overflow: hidden; border-top: none; background: var(--bg); }
.duo-hero::before {
  content: ""; position: absolute; top: -200px; right: -200px;
  width: 560px; height: 560px;
  background: radial-gradient(circle, rgba(88,204,2,.18), transparent 70%);
  pointer-events: none;
}
.duo-hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; position: relative; z-index: 1; }
@media (max-width: 900px) { .duo-hero-grid { grid-template-columns: 1fr; } }

.duo-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--duo-green-soft); font-family: 'JetBrains Mono'; margin-bottom: 22px;
}
.duo-eyebrow::before { content: ""; width: 6px; height: 6px; background: var(--duo-green-soft); border-radius: 50%; }

h1.duo-hero-title {
  font-size: clamp(36px, 5vw, 56px); line-height: 1.07;
  font-weight: 800; letter-spacing: -.02em; margin-bottom: 22px;
}
h1.duo-hero-title em { font-style: normal; color: var(--duo-green-soft); }

.duo-hero-sub { font-size: 18px; color: var(--text-dim); max-width: 480px; margin-bottom: 32px; }
.duo-hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }

.duo-btn-primary {
  background: var(--duo-green); color: #fff; padding: 14px 22px;
  border-radius: 12px; font-weight: 700; font-size: 15px;
  display: inline-flex; align-items: center; gap: 8px;
  transition: transform .15s ease, background .15s ease;
  font-family: 'Nunito';
}
.duo-btn-primary:hover { background: #4db800; transform: translateY(-2px); }

.duo-btn-ghost {
  border: 1px solid var(--line); color: var(--text); padding: 14px 22px;
  border-radius: 12px; font-weight: 600; font-size: 15px;
  display: inline-flex; align-items: center; gap: 8px;
  transition: border-color .15s ease;
}
.duo-btn-ghost:hover { border-color: var(--duo-green-soft); }

.duo-meta-row { display: flex; gap: 32px; flex-wrap: wrap; padding-top: 28px; border-top: 1px solid var(--line-soft); }
.duo-meta-item .k { font-size: 11px; text-transform: uppercase; letter-spacing: .07em; color: var(--text-faint); font-family: 'JetBrains Mono'; margin-bottom: 6px; }
.duo-meta-item .v { font-size: 14px; color: var(--text); font-weight: 700; }

/* ── Hero visual / phone ────────────────────────────────────── */
.duo-hero-visual { display: flex; flex-direction: column; align-items: center; gap: 18px; }

.duo-phone-frame {
  width: 182px;
  padding: 3px;
  background: #ffffff;
  border: 4px solid #000000;
  border-radius: 20px;
  box-shadow:
    0 20px 60px -10px rgba(88,204,2,.35),
    0 0 30px -10px rgba(88,204,2,.18);
  overflow: hidden;
}

.duo-phone-screen {
  display: flex;
  flex-direction: column;
  width: 100%;
  background: #ffffff;
  border-radius: 13px;
  overflow: hidden;
}

.duo-phone-carousel { display: grid; width: 100%; }

.duo-phone-slide {
  grid-area: 1 / 1;
  width: 100%;
  display: block;
  opacity: 0;
  transition: opacity .6s ease;
  border-radius: 13px 13px 0 0;
  background: #ffffff;
}

.duo-phone-slide.is-active { opacity: 1; }

.duo-phone-pad {
  flex-shrink: 0;
  width: 100%;
  height: 3px;
  background: #ffffff;
}

.duo-xp-bar {
  width: 182px; background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px 14px; font-family: 'JetBrains Mono';
}
.duo-xp-row  { display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: var(--text-faint); margin-bottom: 8px; }
.duo-xp-line { font-size: 12px; color: var(--text); min-height: 16px; transition: opacity .25s ease; }
.duo-xp-line .dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; margin-right: 7px; background: var(--duo-green); }

.duo-carousel-dots { display: flex; gap: 8px; justify-content: center; }
.duo-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--line); border: none; cursor: pointer; padding: 0;
  transition: background .2s ease, transform .2s ease;
}
.duo-dot.is-active { background: var(--duo-green-soft); transform: scale(1.35); }

/* ── Secciones genéricas ────────────────────────────────────── */
section.duo-section { padding: 108px 0; border-top: 1px solid var(--line-soft); transition: background .25s ease; }
.duo-section-head { max-width: 640px; margin-bottom: 56px; }
.duo-phase-no { font-family: 'JetBrains Mono'; font-size: 13px; color: var(--duo-green-soft); letter-spacing: .05em; margin-bottom: 14px; display: block; }
h2.duo-section-title { font-size: clamp(26px, 3.2vw, 38px); font-weight: 800; letter-spacing: -.02em; margin-bottom: 18px; }
.duo-section-lede { font-size: 17px; color: var(--text-dim); line-height: 1.65; }

/* Alternancia de fondos verde / blanco, estilo Duolingo */
#research, #design-system, #mi-rol { background: var(--bg-elev-2); }
#ux, #tests { background: var(--bg); }

/* Cabecera de sección con ilustración a la derecha */
.duo-section-head--img { display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.duo-section-illustration { width: 150px; flex-shrink: 0; margin: 0 auto; }
@media (max-width: 760px) {
  .duo-section-head--img { flex-direction: column-reverse; }
  .duo-section-illustration { width: 110px; margin: 0 auto; }
}

/* Research — logo alineado con texto, centrado sobre columna Mimo */
.duo-research-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: center;
  margin-bottom: 20px;
}
.duo-research-top .duo-section-head { margin-bottom: 0; max-width: none; }
.duo-research-logo {
  display: flex;
  align-items: center;
  justify-content: center;
}
.duo-research-logo img {
  width: 150px;
  max-width: 100%;
  height: auto;
}
@media (max-width: 720px) {
  .duo-research-top { grid-template-columns: 1fr; gap: 32px; margin-bottom: 32px; }
  .duo-research-logo img { width: 110px; }
}

/* Cabecera de sección centrada */
.duo-section-head--center { max-width: 720px; margin-inline: auto; text-align: center; }

/* ── Bruno Munari quote ─────────────────────────────────────── */
.duo-munari {
  padding: 72px 0;
  border-top: 1px solid var(--line-soft);
  background: var(--bg-elev-2);
}
.duo-munari__inner { text-align: center; max-width: 720px; margin-inline: auto; }
.duo-munari__text {
  font-size: clamp(22px, 3.2vw, 36px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--text);
  margin-bottom: 20px;
}
.duo-munari__author {
  font-family: 'JetBrains Mono';
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--duo-green-soft);
}

/* ── Agenda cards ───────────────────────────────────────────── */
.duo-agenda {
  padding: 80px 0 96px;
  border-top: 1px solid var(--line-soft);
  background: var(--bg-elev);
}
.duo-agenda-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 12px;
}
@media (max-width: 1100px) { .duo-agenda-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 640px) {
  .duo-agenda-grid {
    grid-auto-flow: column;
    grid-template-columns: repeat(7, minmax(124px, 1fr));
    overflow-x: auto;
    padding-bottom: 10px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }
  .duo-agenda-card { scroll-snap-align: start; }
}
.duo-agenda-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.duo-agenda-card:hover {
  transform: translateY(-3px);
  border-color: rgba(88,204,2,.35);
  box-shadow: 0 8px 28px rgba(0,0,0,.12);
}
.duo-agenda-card__icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
}
.duo-agenda-card__icon i { font-size: 16px; }
.duo-agenda-card--green .duo-agenda-card__icon { background: rgba(88,204,2,.14); }
.duo-agenda-card--blue  .duo-agenda-card__icon { background: rgba(24,153,214,.14); }
.duo-agenda-card--yellow .duo-agenda-card__icon { background: rgba(199,159,0,.14); }
.duo-agenda-card--green .duo-agenda-card__icon i  { color: var(--duo-green-soft); }
.duo-agenda-card--blue  .duo-agenda-card__icon i  { color: var(--duo-blue); }
.duo-agenda-card--yellow .duo-agenda-card__icon i { color: var(--duo-yellow); }
.duo-agenda-card--green { border-color: rgba(88,204,2,.25); }
.duo-agenda-card--blue  { border-color: rgba(24,153,214,.25); }
.duo-agenda-card--yellow { border-color: rgba(199,159,0,.22); }
.duo-agenda-card__no {
  font-size: 10px;
  color: var(--text-faint);
  letter-spacing: .08em;
}
.duo-agenda-card h3 {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.2;
}
.duo-agenda-card p {
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.4;
}

/* ── User + big stats ───────────────────────────────────────── */
.duo-user {
  padding: 80px 0 96px;
  border-top: 1px solid var(--line-soft);
  background: var(--bg-elev-2);
}
.duo-user__head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.duo-user__head .duo-section-title em {
  font-style: normal;
  color: var(--duo-green-soft);
}
.duo-bigstat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 56px;
}
@media (max-width: 860px) { .duo-bigstat-grid { grid-template-columns: 1fr; } }
.duo-bigstat-cell {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
}
.duo-bigstat-cell--green { border-color: rgba(88,204,2,.3); background: linear-gradient(160deg, rgba(88,204,2,.08), var(--bg-elev)); }
.duo-bigstat-cell--blue  { border-color: rgba(28,176,246,.3); background: linear-gradient(160deg, rgba(28,176,246,.08), var(--bg-elev)); }
.duo-bigstat-cell--yellow { border-color: rgba(255,217,0,.25); background: linear-gradient(160deg, rgba(255,217,0,.07), var(--bg-elev)); }
.duo-bigstat-num {
  display: block;
  font-size: clamp(48px, 7vw, 72px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.03em;
  margin-bottom: 14px;
  font-family: 'JetBrains Mono';
}
.duo-bigstat-cell--green .duo-bigstat-num  { color: var(--duo-green-soft); }
.duo-bigstat-cell--blue .duo-bigstat-num   { color: var(--duo-blue); }
.duo-bigstat-cell--yellow .duo-bigstat-num { color: var(--duo-yellow); }
.duo-bigstat-cell p { font-size: 14px; color: var(--text-dim); line-height: 1.55; }

/* ── Perfil de usuario — sección propia, en horizontal ────────── */
.duo-user-profile-section {
  padding: 96px 0;
  border-top: 1px solid var(--line-soft);
}
.duo-user-profile-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 72px;
  width: 100%;
}
.duo-user-illustration {
  flex: 1 1 50%;
  width: 100%;
  max-width: none;
  transform: scale(0.8);
  transform-origin: center center;
}
.duo-user-profile {
  flex: 1 1 50%;
  max-width: none;
  text-align: left;
}
@media (max-width: 760px) {
  .duo-user-profile-row { flex-direction: column; gap: 40px; }
  .duo-user-profile { text-align: center; }
}

.duo-user-profile__text {
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  margin-bottom: 32px;
}
.duo-user-profile__text em {
  font-style: normal;
  color: var(--duo-green-soft);
}
.duo-traits {
  display: flex;
  justify-content: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}
@media (max-width: 760px) { .duo-traits { justify-content: center; } }
.duo-trait {
  font-size: 15px;
  font-weight: 800;
  padding: 12px 22px;
  border-radius: 99px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
}
.duo-trait--green  { border-color: rgba(88,204,2,.35); color: var(--duo-green-soft); }
.duo-trait--blue   { border-color: rgba(28,176,246,.35); color: var(--duo-blue); }
.duo-trait--yellow { border-color: rgba(255,217,0,.35); color: var(--duo-yellow); }

/* ── Benchmark cards ────────────────────────────────────────── */
.duo-bench-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 720px) { .duo-bench-grid { grid-template-columns: 1fr; } }
.duo-bcard {
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 24px;
}
.duo-bcard .bcard-icon {
  font-size: 26px; margin-bottom: 18px; display: inline-block;
  filter: drop-shadow(0 0 8px rgba(88,204,2,.35));
}
.duo-bcard .bcard-label { font-family: 'JetBrains Mono'; font-size: 11px; color: var(--text-faint); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 10px; display: block; }
.duo-bcard h3 { font-size: 17px; font-weight: 800; margin-bottom: 12px; }
.duo-bcard .gains { margin-bottom: 10px; }
.duo-bcard .gains li, .duo-bcard .pains li { font-size: 13.5px; color: var(--text-dim); list-style: none; padding: 3px 0; padding-left: 18px; position: relative; }
.duo-bcard .gains li::before { content: "✓"; position: absolute; left: 0; color: var(--duo-green-soft); font-size: 12px; }
.duo-bcard .pains li::before { content: "✗"; position: absolute; left: 0; color: var(--duo-red); font-size: 12px; }

.duo-bench-finding {
  margin-top: 28px;
  background: linear-gradient(135deg, rgba(88,204,2,.10), rgba(88,204,2,.02));
  border: 1px solid rgba(88,204,2,.25); border-radius: var(--radius); padding: 24px 26px;
  display: flex; gap: 20px; align-items: flex-start;
}
.duo-bench-finding .find-icon { font-size: 24px; flex-shrink: 0; margin-top: 2px; }
.duo-bench-finding p { font-size: 14.5px; color: var(--text-dim); flex: 1; }
.duo-bench-finding strong { color: var(--text); }

/* ── Sprints — cards estilo Duolingo ──────────────────────────── */
.duo-sprint-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
@media (max-width: 980px) { .duo-sprint-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .duo-sprint-grid { grid-template-columns: 1fr; } }

.duo-sprint-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.duo-sprint-card:hover { transform: translateY(-3px); box-shadow: 0 8px 28px rgba(0,0,0,.12); }
.duo-sprint-card__icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; margin-bottom: 4px;
}
.duo-sprint-card--green  { border-color: rgba(88,204,2,.25); }
.duo-sprint-card--blue   { border-color: rgba(24,153,214,.25); }
.duo-sprint-card--yellow { border-color: rgba(199,159,0,.22); }
.duo-sprint-card--green  .duo-sprint-card__icon { background: rgba(88,204,2,.14); color: var(--duo-green-soft); }
.duo-sprint-card--blue   .duo-sprint-card__icon { background: rgba(24,153,214,.14); color: var(--duo-blue); }
.duo-sprint-card--yellow .duo-sprint-card__icon { background: rgba(199,159,0,.14); color: var(--duo-yellow); }
.duo-sprint-card__no {
  font-family: 'Nunito', sans-serif; font-weight: 800; font-size: 11px;
  text-transform: uppercase; letter-spacing: .06em; color: var(--text-faint);
}
.duo-sprint-card h3 { font-size: 16px; font-weight: 800; line-height: 1.25; }
.duo-sprint-card p  { font-size: 13.5px; color: var(--text-dim); line-height: 1.5; }

.duo-hdu-pills { display: flex; gap: 8px; flex-wrap: wrap; margin-top: auto; padding-top: 6px; }
.duo-hdu-pill {
  font-family: 'Nunito', sans-serif; font-weight: 700; font-size: 11px;
  background: rgba(88,204,2,.10); border: 1px solid rgba(88,204,2,.25);
  color: var(--duo-green-soft); padding: 4px 10px; border-radius: 99px;
}

/* ── Flujos clave ───────────────────────────────────────────── */
.duo-flow-list { display: flex; flex-direction: column; }
.duo-flow-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 22px;
  padding: 32px 0;
  border-top: 1px solid var(--line-soft);
}
.duo-flow-item:first-child { border-top: none; }
.duo-flow-no { font-family: 'JetBrains Mono'; font-size: 26px; font-weight: 700; color: var(--duo-green-soft); line-height: 1; padding-top: 4px; }
.duo-flow-body { grid-column: 2; }
.duo-flow-item h3 { font-size: 18px; font-weight: 800; margin-bottom: 8px; }
.duo-flow-item p  { font-size: 14.5px; color: var(--text-dim); margin-bottom: 0; max-width: none; }
.duo-flow-exhibit {
  grid-column: 1 / -1;
  width: 100%;
  margin-top: 20px;
}
.duo-flow-exhibit img {
  width: 100%;
  height: 280px;
  object-fit: contain;
  object-position: center center;
}

.duo-exhibit { background: var(--bg-elev); border: 1px solid var(--line); border-radius: 0; padding: 14px; }
.duo-exhibit img { width: 100%; display: block; }
.duo-exhibit--transparent { background: transparent; border-color: transparent; padding: 0; }

.duo-ux-callout {
  margin-top: 48px; border: 1px dashed var(--line); border-radius: var(--radius);
  padding: 24px 26px; font-size: 14.5px; color: var(--text-dim);
}
.duo-ux-callout strong { color: var(--duo-green-soft); }

@media (max-width: 640px) {
  .duo-flow-item { grid-template-columns: 1fr; }
  .duo-flow-no { font-size: 20px; }
  .duo-flow-body { grid-column: 1; }
  .duo-flow-exhibit img { height: 220px; }
}

/* ── Design System ──────────────────────────────────────────── */
.duo-ds-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: stretch;
}
@media (max-width: 860px) { .duo-ds-grid { grid-template-columns: 1fr; } }

.duo-ds-col {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}
.duo-ds-type {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.55;
}
.duo-ds-type strong { color: var(--text); }
.duo-ds-components-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--text-faint);
  font-family: 'JetBrains Mono';
  margin-bottom: 18px;
}
.duo-ds-logos {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 28px;
  margin-top: auto;
  padding-top: 24px;
  width: 100%;
}
.duo-ds-logo--duolingo {
  width: 100%;
  max-width: 240px;
  height: auto;
}
.duo-ds-logo--dogs {
  width: 100%;
  max-width: 264px;
  color: var(--duo-green);
  display: flex;
  justify-content: center;
}
:root[data-theme="dark"] .duo-ds-logo--dogs { color: #ffffff; }
.duo-ds-logo--dogs .duo-logo-svg {
  width: 100%;
  height: auto;
  max-height: 48px;
}

.duo-color-group { margin-bottom: 32px; }
.duo-color-group:last-of-type { margin-bottom: 0; }
.duo-color-group h4 { font-size: 11px; text-transform: uppercase; letter-spacing: .07em; color: var(--text-faint); font-family: 'JetBrains Mono'; margin-bottom: 14px; }
.duo-swatches { display: flex; gap: 12px; flex-wrap: wrap; }
.duo-swatch { width: 64px; }
.duo-chip { width: 48px; height: 48px; border-radius: 10px; border: 1px solid var(--line); margin-bottom: 6px; }
.duo-swatch .name { font-size: 10.5px; color: var(--text); font-weight: 600; }
.duo-swatch .hex  { font-size: 9.5px; color: var(--text-faint); font-family: 'JetBrains Mono'; }

.duo-component-list { display: flex; flex-direction: column; gap: 12px; flex: 1; }
.duo-component-card {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px;
  display: flex; align-items: center; gap: 14px;
}
.duo-component-card i { font-size: 18px; color: var(--duo-green-soft); width: 24px; text-align: center; }
.duo-component-card .c-name { font-size: 14px; font-weight: 700; margin-bottom: 2px; }
.duo-component-card .c-desc { font-size: 12.5px; color: var(--text-dim); }

/* ── User Tests ─────────────────────────────────────────────── */
.duo-tests-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
@media (max-width: 720px) { .duo-tests-grid { grid-template-columns: 1fr; } }
.duo-test-card {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px;
}
.duo-test-card h4 { font-family: 'JetBrains Mono'; font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--text-faint); margin-bottom: 18px; }
.duo-test-card ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.duo-test-card li { font-size: 14px; color: var(--text-dim); padding-left: 22px; position: relative; }
.duo-test-card li::before { position: absolute; left: 0; font-size: 12px; }
.duo-test-pains li::before { content: "✗"; color: var(--duo-red); }
.duo-test-gains li::before { content: "✓"; color: var(--duo-green-soft); }

/* ── Animación flotante ─────────────────────────────────────── */
@keyframes duo-float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-7px); }
}

/* ── Role cards ─────────────────────────────────────────────── */
.duo-role-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 860px) { .duo-role-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .duo-role-grid { grid-template-columns: 1fr; } }

.duo-role-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 22px; background: var(--bg-elev); }
.duo-role-icon {
  font-size: 26px; color: var(--duo-green-soft); display: inline-block;
  margin-bottom: 18px; filter: drop-shadow(0 0 8px rgba(88,204,2,.4));
}
.duo-role-card .tag { font-family: 'JetBrains Mono'; font-size: 11px; color: var(--duo-green-soft); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 12px; display: block; }
.duo-role-card p { font-size: 14px; color: var(--text-dim); }
.df1 { animation: duo-float 3.2s ease-in-out infinite 0s; }
.df2 { animation: duo-float 3.2s ease-in-out infinite .6s; }
.df3 { animation: duo-float 3.2s ease-in-out infinite 1.2s; }
.df4 { animation: duo-float 3.2s ease-in-out infinite 1.8s; }
.df5 { animation: duo-float 3.2s ease-in-out infinite 2.4s; }

/* ── Next steps pills ───────────────────────────────────────── */
.duo-next-pills { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
.duo-next-pill {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 18px; font-size: 14px; color: var(--text-dim);
}
.duo-next-pill i { color: var(--duo-green-soft); font-size: 15px; }

/* ── CTA ────────────────────────────────────────────────────── */
.duo-cta {
  text-align: center; border-radius: 24px;
  background: var(--bg-elev-2);
  border: 1px solid var(--line-soft);
  padding: 72px 40px;
}
.duo-cta-illustration { width: 120px; margin: 0 auto 28px; }
.duo-cta h2 { font-size: clamp(24px, 3.2vw, 36px); font-weight: 800; letter-spacing: -.02em; margin-bottom: 16px; color: var(--text); }
.duo-cta p  { color: var(--text-dim); margin-bottom: 32px; font-size: 16px; }
:root[data-theme="dark"] .duo-cta {
  background: linear-gradient(135deg, #0a1a0a, #0a0c0f 60%);
  border-color: rgba(88,204,2,.15);
}
:root[data-theme="dark"] .duo-cta h2 { color: #f3f4f6; }
:root[data-theme="dark"] .duo-cta p  { color: #9aa1ab; }

/* ── Footer ─────────────────────────────────────────────────── */
footer.duo-footer { padding: 48px 0 60px; }
.duo-footer-row { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; color: var(--text-faint); font-size: 13px; }
.duo-footer-row a { color: var(--text-dim); }
.duo-footer-row a:hover { color: var(--text); }