/* ============================================
   components.css - nav, buttons, cards, inputs,
   footer, pricing, FAQ, testimonials, FAB
   CUADRA Design System - dark-first, editorial
   ============================================ */

/* ---- Navigation (DS section 15: minimalist, generous space) ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background: var(--color-black);
  border-bottom: 1px solid var(--color-border);
  height: 72px;
  transition: background var(--transition-fast);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-page);
}

/* Logo: full horizontal lockup (white on dark) with clear space around it */
.nav__logo {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
  text-decoration: none;
  transition: color var(--transition-fast);
  /* clear space: padding >= stroke height of the isotipo */
  padding: 9px 8px;
  margin: -9px -8px;
}

.nav__logo:hover {
  color: var(--color-accent-ink);
}

.nav__logo-img {
  width: 132px;
  height: auto;
  flex-shrink: 0;
  display: block;
}

/* Desktop nav links */
.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-6);
}

.nav__link {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-primary);
  transition: width var(--transition-normal) var(--ease-out);
}

.nav__link:hover,
.nav__link[aria-current="page"] {
  color: var(--color-text);
}

.nav__link[aria-current="page"]::after {
  width: 100%;
}

@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }
}

/* Hamburger button (3 lines, keeps existing JS classes) */
.nav__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
}

@media (min-width: 768px) {
  .nav__hamburger {
    display: none;
  }
}

.nav__hamburger-line {
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 0;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  transform-origin: center;
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu overlay */
.nav__mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: var(--color-black);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.nav__mobile-menu[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
}

.nav__mobile-link {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav__mobile-link:hover,
.nav__mobile-link[aria-current="page"] {
  color: var(--color-accent-ink);
}

@media (min-width: 768px) {
  .nav__mobile-menu {
    display: none;
  }
}

/* ---- Buttons (DS section 13) ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 26px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  border-radius: var(--radius-md);
  transition: transform var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.97);
}

/* Primary: sage bg, black text, uppercase + arrow */
.btn--primary {
  background: var(--color-primary);
  color: var(--color-accent-on-primary);
  border: 1px solid transparent;
}

.btn--primary::after {
  content: '\2192';
  margin-left: var(--space-1);
  font-size: 1rem;
  line-height: 1;
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  color: var(--color-accent-on-primary); /* keep #0F1111 (black) text on sage hover: ~12.7:1 AA (note 6) */
  transform: translateY(-1px);
}

/* Secondary: transparent, thin border, white text */
.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(242, 241, 237, 0.25);
}

.btn--secondary:hover {
  border-color: var(--color-accent-ink);
  color: var(--color-accent-ink);
  transform: translateY(-1px);
}

/* On light sections, secondary border should adapt to dark text */
.section--light .btn--secondary,
.section--mist .btn--secondary {
  border-color: rgba(15, 17, 17, 0.25);
  color: var(--color-text);
}

.btn--full {
  width: 100%;
}

@media (min-width: 768px) {
  .btn--full {
    width: auto;
  }
}

/* ---- Editorial cards (DS section 16: no dashboard boxes) ---- */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: border-color var(--duration-fast) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
  position: relative;
}

.card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

.card__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--color-bg-raised);
  border-radius: var(--radius-xl); /* images use radius-xl per DS section 9 */
  margin-bottom: var(--space-5);
  display: block;
  overflow: hidden;
  /* Photo treatment: integrate the screenshots into CUADRA's cool,
     architectural palette. A slight desaturation + mild contrast bump
     pulls the screenshots toward the cool grey-green family without
     destroying legibility (DS section 10). */
  filter: saturate(0.85) contrast(1.05);
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.card__desc {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__link {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent-ink);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.card__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 1px;
  width: 0;
  background: currentColor;
  transition: width var(--transition-normal) var(--ease-out);
}

.card__link:hover {
  color: var(--color-accent-ink-hover);
}

.card__link:hover::after {
  width: 100%;
}

.card__link-arrow {
  transition: transform var(--transition-fast);
  display: inline-block;
}

.card__link:hover .card__link-arrow {
  transform: translateX(4px);
}

.card__link--demo {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent-ink);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  transition: color var(--transition-fast);
}

.card__link--demo:hover {
  color: var(--color-accent-ink-hover);
}

/* Project card - larger editorial variant */
.card--project {
  padding: 0;
  overflow: hidden;
}

.card--project .card__image {
  border-radius: 0;               /* image bleeds to card edge on project variant */
  margin-bottom: 0;
  aspect-ratio: 16 / 10;
  transition: transform 400ms var(--ease-out);
}

.card--project:hover .card__image {
  transform: scale(1.02);         /* very subtle zoom, no shadow/glow (DS 16) */
}

.card--project .card__body {
  padding: var(--space-6);
}

.card--project .card__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.card--project .card__desc {
  font-family: var(--font-body);
  font-size: 1rem;
  -webkit-line-clamp: 4;
}

/* Project metadata pills - sober, thin border (no saturated token) */
.project-card__pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.pill {
  display: inline-block;
  padding: 5px 12px;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

/* ---- Hero avatar (isotipo block, geometric - DS 2.1) ---- */
.avatar {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-lg);
  background: var(--color-graphite);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-ink);
  flex-shrink: 0;
  transition: transform var(--transition-normal) var(--ease-out);
}

.avatar svg {
  width: 76px;
  height: 76px;
  color: var(--color-accent-ink);
}

.avatar:hover {
  transform: translateY(-2px);
}

@media (min-width: 768px) {
  .avatar {
    width: 180px;
    height: 180px;
  }
  .avatar svg {
    width: 100px;
    height: 100px;
  }
}

/* ---- Inputs (dark theme, DS 9 fine borders) ---- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text-secondary);
  text-transform: uppercase;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-accent-ink);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-error {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-error);
}

.form-input--error,
.form-textarea--error {
  border-color: var(--color-error);
}

.form-success {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-success);
  padding: var(--space-4);
  background: var(--color-accent-subtle);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

/* ---- Footer (DS 15, black bg, vertical logo) ---- */
.footer {
  background: var(--color-black);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-8);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-page);
}

/* Brand block: horizontal lockup (white) + descriptor (DS 2.2) */
.footer__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}

.footer__logo-img {
  width: 132px;
  height: auto;
  display: block;
}

.footer__brand-desc {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.footer__copy {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.footer__location {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.footer__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.footer__link {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.footer__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 1px;
  width: 0;
  background: currentColor;
  transition: width var(--transition-normal) var(--ease-out);
}

.footer__link:hover {
  color: var(--color-text);
}

.footer__link:hover::after {
  width: 100%;
}

@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }
  .footer__brand {
    align-items: flex-start;
    text-align: left;
  }
}

/* ---- Contact links (thin borders, linear icons) ---- */
.contact-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .contact-links {
    grid-template-columns: repeat(3, 1fr);
  }
}

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-accent-ink);
  text-decoration: none;
  transition: border-color var(--duration-fast) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.contact-link:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-1px);
}

.contact-link__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.contact-link__icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--color-accent-ink);
  fill: none;              /* linear icons, no fills (DS 12) */
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-link__text {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  word-break: break-all;
}

@media (min-width: 768px) {
  .contact-link__text {
    font-size: 1rem;
  }
}

/* ---- Tech stack icons (kept for compatibility) ---- */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  align-items: center;
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.tech-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.tech-item:hover .tech-icon {
  border-color: var(--color-accent-ink);
  color: var(--color-accent-ink);
}

.tech-icon svg,
.tech-icon i {
  width: 28px;
  height: 28px;
  font-size: 28px;
  fill: currentColor;
  color: inherit;
}

.tech-name {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text-secondary);
}

/* ---- Principles ---- */
.principles {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.principle {
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.principle:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.principle__title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.principle__desc {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ---- WhatsApp FAB (reskinned: graphite/black, thin border, linear icon) ---- */
.whatsapp-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 90;
  width: 56px;
  height: 56px;
  background: var(--color-graphite);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: transform var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
  text-decoration: none;
}

.whatsapp-fab svg {
  width: 26px;
  height: 26px;
  stroke: var(--color-primary);     /* sage on graphite: AA pass, FAB always on dark */
  fill: none;               /* linear outline icon (DS 12) */
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.whatsapp-fab:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
  background: var(--color-black);
}

.whatsapp-fab:active {
  transform: scale(0.95);
}

@media (min-width: 768px) {
  .whatsapp-fab {
    bottom: 32px;
    right: 32px;
    width: 60px;
    height: 60px;
  }
}

/* ---- Pricing cards (DS 13: thin borders, no shadows/gradients) ---- */
.pricing-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: 420px;
  margin-inline: auto;
}

@media (min-width: 768px) {
  .pricing-cards {
    /* minmax(0,1fr) (not bare 1fr): equal columns without min-content
       inflation, which used to overflow the container at mid widths. */
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: 1100px;
    column-gap: var(--space-5);
  }
}

.pricing-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  position: relative;
  transition: border-color var(--duration-fast) var(--ease-out);
}

.pricing-card:hover {
  border-color: var(--color-border-strong);
}

.pricing-card__label {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.pricing-card__price {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.pricing-card__price .highlight {
  color: var(--color-accent-ink);
}

.pricing-card__list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-align: left;
}

.pricing-card__item {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding-left: var(--space-6);
  position: relative;
}

.pricing-card__item::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--color-accent-ink);   /* monochrome check, correct accent (DS 13) */
  font-weight: 600;
}

/* Featured pricing card - thin sage border, no saturated glow.
   Uses a dark graphite backdrop so the featured plan reads as a
   deliberate editorial break inside the light pricing band. */
.pricing-card--featured {
  --color-text: var(--color-white);
  --color-text-secondary: var(--color-concrete);
  --color-text-muted: var(--color-concrete);
  --color-border: rgba(242, 241, 237, 0.12);
  --color-primary: var(--color-sage);
  --color-primary-hover: #C2D7D1;   /* light sage hover so primary button text (black) passes AA */
  --color-accent-ink: var(--color-sage);   /* sage accents pass on graphite */
  --color-accent-ink-hover: var(--color-sage);
  background: var(--color-graphite);
  border-color: var(--color-sage);
}

.pricing-card--featured:hover {
  border-color: var(--color-sage);
}

.pricing-card--featured .pricing-card__badge {
  color: var(--color-sage);
  border-color: rgba(175, 200, 194, 0.4);
}

/* Badge: sober text + thin border (no saturated block) */
.pricing-card__badge {
  display: inline-block;
  margin-bottom: var(--space-5);
  padding: 6px 14px;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-sage);
  background: transparent;
  border: 1px solid rgba(175, 200, 194, 0.4);
  border-radius: var(--radius-sm);
}

/* ---- FAQ (thin borders, rectilinear) ---- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 700px;
  margin-inline: auto;
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item[open] {
  border-color: var(--color-border-strong);
}

.faq-item__question {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-5) var(--space-5);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  transition: color var(--transition-fast);
}

.faq-item__question::-webkit-details-marker {
  display: none;
}

.faq-item__question::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color-accent-ink);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.faq-item[open] .faq-item__question::after {
  content: '\2212';
}

.faq-item__question:hover {
  color: var(--color-accent-ink);
}

.faq-item__answer {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding: 0 var(--space-5) var(--space-6);
  line-height: 1.7;
}

/* ---- Testimonial source badges (monochrome linear) ---- */
.testimonial-card__source {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-card__source-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px 10px;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.testimonial-card__source-badge svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Google badge: no red #ea4335; mono sage/concrete line per DS 12 */
.testimonial-card__source-badge--google {
  color: var(--color-accent-ink);
}

.testimonial-card__source-badge--google svg {
  stroke: var(--color-accent-ink);
}

.testimonial-card__source-date {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ---- Case Study (comparison, thin borders) ---- */
.case-study {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
}

@media (min-width: 768px) {
  .case-study {
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-6);
    align-items: stretch;
  }
}

.case-study__before,
.case-study__after {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.case-study__before {
  border-color: var(--color-border);   /* palette-neutral "Antes" border (Vega: no red) */
}

.case-study__after {
  border-color: rgba(175, 200, 194, 0.35);   /* sage-tinted "after" border */
}

.case-study__label {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.case-study__before .case-study__label {
  color: var(--color-before-strong);   /* dark concrete "Antes" label, AA on white (note 5) */
}

.case-study__after .case-study__label {
  color: var(--color-accent-ink);
}

.case-study__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-ink);
  transform: rotate(90deg);
}

@media (min-width: 768px) {
  .case-study__arrow {
    transform: rotate(0deg);
  }
}

/* Mockup visual - rectilinear, no gradient */
.case-study__visual {
  margin-bottom: var(--space-6);
}

.case-study__mockup {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-raised);
}

.case-study__mockup--live {
  border-color: rgba(175, 200, 194, 0.35);
}

.case-study__mockup-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.case-study__mockup-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border-strong);
}

.case-study__mockup-body {
  padding: var(--space-8) var(--space-6);
  text-align: center;
}

.case-study__mockup-text {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.case-study__mockup-subtext {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.case-study__visual--before .case-study__mockup-text {
  color: var(--color-text-muted);
}

.case-study__visual--after .case-study__mockup-text {
  color: var(--color-accent-ink);
}

/* Metrics */
.case-study__metrics {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.case-study__metric {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.case-study__metric-value {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-accent-ink);
}

.case-study__metric-value--error {
  color: var(--color-before-strong);   /* "Antes" metric, dark concrete (no red) */
}