:root {
      --black: #0a0a0a;
      --ink: #131313;
      --graphite: #1d1d1f;
      --gray-700: #3a3a3d;
      --gray-500: #6b6b70;
      --gray-300: #c9c9ce;
      --gray-100: #f2f2f4;
      --paper: #fafafa;
      --white: #ffffff;
      --line: rgba(255, 255, 255, .14);
      --line-dark: rgba(10, 10, 10, .10);
      --accent: #0a0a0a;
      --safety: #ea580c;
      --safety-ink: #c2410c;
      --font-display: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
      --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
      --wa: #25d366;
      --ease: cubic-bezier(.22, 1, .36, 1);
      --pad: clamp(1.25rem, 5vw, 7rem);
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box
    }

    html {
      scroll-behavior: smooth
    }

    body {
      font-family: var(--font-body);
      color: var(--ink);
      background: var(--paper);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    h1,
    h2,
    h3,
    h4 {
      font-family: var(--font-display);
      font-weight: 600;
      line-height: 1.02;
      letter-spacing: -.02em
    }

    a {
      color: inherit;
      text-decoration: none
    }

    img {
      display: block;
      max-width: 100%
    }

    section {
      position: relative
    }

    .wrap {
      max-width: 1360px;
      margin: 0 auto;
      padding-left: var(--pad);
      padding-right: var(--pad)
    }

    .eyebrow {
      font-family: var(--font-body);
      font-size: .72rem;
      font-weight: 600;
      letter-spacing: .22em;
      text-transform: uppercase;
      color: var(--gray-500);
      display: inline-flex;
      align-items: center;
      gap: .7rem;
    }

    .eyebrow::before {
      content: "";
      width: 26px;
      height: 2px;
      background: var(--safety);
      display: inline-block
    }

    .eyebrow.light {
      color: var(--gray-300)
    }

    .eyebrow.light::before {
      background: var(--safety)
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      gap: .6rem;
      font-family: var(--font-body);
      font-weight: 500;
      font-size: .95rem;
      padding: 1rem 1.7rem;
      border-radius: 2px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all .4s var(--ease);
      white-space: nowrap;
    }

    .btn svg {
      width: 17px;
      height: 17px
    }

    .btn-primary {
      background: var(--safety);
      color: var(--white)
    }

    .btn-primary:hover {
      background: var(--safety-ink);
      transform: translateY(-2px)
    }

    .btn-wa {
      background: var(--wa);
      color: #04331a
    }

    .btn-wa:hover {
      filter: brightness(1.05);
      transform: translateY(-2px)
    }

    .btn-ghost {
      background: transparent;
      color: var(--ink);
      border-color: var(--line-dark)
    }

    .btn-ghost:hover {
      border-color: var(--ink);
      transform: translateY(-2px)
    }

    .btn-ghost.light {
      color: var(--white);
      border-color: var(--line)
    }

    .btn-ghost.light:hover {
      background: var(--white);
      color: var(--black);
      border-color: var(--white)
    }

    /* Header */
    header.site {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      transition: background .5s var(--ease), border-color .5s var(--ease), padding .5s var(--ease);
      border-bottom: 1px solid transparent;
    }

    header.site .bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 2rem;
      padding-top: 1.2rem;
      padding-bottom: 1.2rem;
      transition: padding .5s var(--ease);
    }

    header.site .logo {
      flex-shrink: 0;
      display: block
    }

    header.site .logo img {
      height: 46px;
      width: auto;
      max-width: none;
      flex-shrink: 0;
      transition: opacity .4s var(--ease)
    }

    header.site .logo .l-dark {
      display: none
    }

    header.site nav {
      display: flex;
      gap: 2.2rem;
      align-items: center
    }

    header.site nav a.navlink {
      font-size: .9rem;
      font-weight: 400;
      color: var(--white);
      opacity: .85;
      position: relative;
      padding: .3rem 0;
      transition: opacity .3s;
    }

    header.site nav a.navlink::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 0;
      height: 1px;
      width: 0;
      background: currentColor;
      transition: width .35s var(--ease);
    }

    header.site nav a.navlink:hover {
      opacity: 1
    }

    header.site nav a.navlink:hover::after {
      width: 100%
    }

    header.site .actions {
      display: flex;
      align-items: center;
      gap: 1rem
    }

    /* scrolled state */
    header.site.scrolled {
      background: rgba(250, 250, 250, .85);
      backdrop-filter: blur(16px);
      border-bottom-color: var(--line-dark)
    }

    header.site.scrolled .bar {
      padding-top: .75rem;
      padding-bottom: .75rem
    }

    header.site.scrolled .logo .l-light {
      display: none
    }

    header.site.scrolled .logo .l-dark {
      display: block
    }

    header.site.scrolled nav a.navlink {
      color: var(--ink)
    }

    header.site.scrolled .btn-ghost.light {
      color: var(--ink);
      border-color: var(--line-dark)
    }

    header.site.scrolled .btn-ghost.light:hover {
      background: var(--black);
      color: var(--white);
      border-color: var(--black)
    }

    .menu-toggle {
      display: none;
      background: none;
      border: 0;
      cursor: pointer;
      flex-direction: column;
      gap: 5px;
      padding: .4rem
    }

    .menu-toggle span {
      width: 26px;
      height: 2px;
      background: var(--white);
      transition: .3s
    }

    header.site.scrolled .menu-toggle span {
      background: var(--ink)
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: flex-end;
      color: var(--white);
      overflow: hidden
    }

    .hero .bg {
      position: absolute;
      inset: 0;
      z-index: -2;
      background: var(--ink)
    }

    .hero .bg img,
    .hero .bg video {
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: grayscale(.35) contrast(1.05) brightness(.72)
    }

    .hero .bg::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(10, 10, 10, .55) 0%, rgba(10, 10, 10, .15) 35%, rgba(10, 10, 10, .55) 75%, rgba(10, 10, 10, .9) 100%)
    }

    .hero .inner {
      padding-bottom: clamp(3rem, 7vh, 6rem);
      padding-top: 9rem;
      width: 100%
    }

    .hero .eyebrow {
      margin-bottom: 1.6rem
    }

    .hero h1 {
      font-size: clamp(2.8rem, 7.5vw, 7rem);
      font-weight: 700;
      max-width: 16ch;
      margin-bottom: 1.6rem;
      text-wrap: balance;
    }

    .hero p.lede {
      font-size: clamp(1.05rem, 1.6vw, 1.35rem);
      max-width: 52ch;
      color: var(--gray-300);
      font-weight: 300;
      margin-bottom: 2.4rem
    }

    .hero .cta-row {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
      align-items: center
    }

    .hero .scroll-meta {
      position: absolute;
      right: var(--pad);
      bottom: clamp(3rem, 7vh, 6rem);
      writing-mode: vertical-rl;
      font-size: .72rem;
      letter-spacing: .2em;
      text-transform: uppercase;
      color: var(--gray-300);
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .hero .scroll-meta::after {
      content: "";
      width: 1px;
      height: 60px;
      background: linear-gradient(var(--gray-300), transparent)
    }

    /* Trust strip */
    .strip {
      background: var(--black);
      color: var(--white);
      border-top: 1px solid var(--line)
    }

    .strip .wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1px;
      background: var(--line)
    }

    .strip .cell {
      background: var(--black);
      padding: 2.4rem clamp(1rem, 2vw, 2.2rem)
    }

    .strip .num {
      font-family: var(--font-display);
      font-size: clamp(2.2rem, 4vw, 3.4rem);
      font-weight: 500;
      letter-spacing: -.03em;
      line-height: 1
    }

    .strip .lbl {
      font-size: .82rem;
      color: var(--gray-300);
      margin-top: .6rem;
      font-weight: 300
    }

    /* Section shell */
    .band {
      padding: clamp(4.5rem, 10vh, 9rem) 0
    }

    .band.tight {
      padding: clamp(3.5rem, 7vh, 6rem) 0
    }

    .sec-head {
      display: flex;
      justify-content: space-between;
      align-items: flex-end;
      gap: 2rem;
      margin-bottom: 3.5rem;
      flex-wrap: wrap
    }

    .sec-head h2 {
      font-size: clamp(2rem, 4.6vw, 4rem);
      max-width: 18ch
    }

    .sec-head .eyebrow {
      margin-bottom: 1.4rem
    }

    .sec-head p.intro {
      max-width: 42ch;
      color: var(--gray-500);
      font-size: 1.05rem
    }

    /* Services */
    .services {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem
    }

    .svc {
      position: relative;
      border: 1px solid var(--line-dark);
      background: var(--white);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      min-height: 520px;
      transition: transform .5s var(--ease), box-shadow .5s var(--ease);
    }

    .svc:hover {
      transform: translateY(-6px);
      box-shadow: 0 30px 60px -30px rgba(10, 10, 10, .35)
    }

    .svc .img {
      height: 250px;
      overflow: hidden
    }

    .svc .img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: grayscale(.5) contrast(1.03);
      transition: transform .8s var(--ease), filter .6s
    }

    .svc:hover .img img {
      transform: scale(1.06);
      filter: grayscale(0)
    }

    .svc .body {
      padding: 2rem;
      display: flex;
      flex-direction: column;
      flex: 1
    }

    .svc .idx {
      font-family: var(--font-display);
      font-size: .8rem;
      color: var(--gray-500);
      letter-spacing: .1em;
      margin-bottom: 1rem
    }

    .svc h3 {
      font-size: 1.55rem;
      margin-bottom: .9rem
    }

    .svc p {
      color: var(--gray-500);
      font-size: .98rem;
      margin-bottom: 1.4rem
    }

    .svc ul {
      list-style: none;
      margin-top: auto;
      display: flex;
      flex-direction: column;
      gap: .55rem
    }

    .svc ul li {
      font-size: .9rem;
      color: var(--gray-700);
      display: flex;
      gap: .6rem;
      align-items: flex-start
    }

    .svc ul li::before {
      content: "";
      width: 6px;
      height: 6px;
      background: var(--black);
      margin-top: .5rem;
      flex: none
    }

    .svc .go {
      margin-top: 1.6rem;
      font-size: .85rem;
      font-weight: 600;
      letter-spacing: .05em;
      display: inline-flex;
      gap: .5rem;
      align-items: center;
      text-transform: uppercase
    }

    .svc .go svg {
      width: 15px;
      transition: transform .4s var(--ease)
    }

    .svc:hover .go svg {
      transform: translateX(5px)
    }

    /* Portfolio */
    .portfolio {
      background: var(--black);
      color: var(--white)
    }

    .portfolio .sec-head h2 {
      color: var(--white)
    }

    .portfolio .sec-head p.intro {
      color: var(--gray-300)
    }

    .grid-proj {
      display: grid;
      grid-template-columns: repeat(12, 1fr);
      gap: 1.2rem;
      grid-auto-flow: dense
    }

    .proj {
      position: relative;
      overflow: hidden;
      min-height: 300px;
      background: var(--graphite);
      cursor: pointer
    }

    .proj.big {
      grid-column: span 8;
      min-height: 520px
    }

    .proj.med {
      grid-column: span 4;
      min-height: 520px
    }

    .proj.sm {
      grid-column: span 4;
      min-height: 340px
    }

    .proj img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: grayscale(.7) brightness(.78);
      transition: transform 1s var(--ease), filter .6s
    }

    .proj:hover img {
      transform: scale(1.05);
      filter: grayscale(0) brightness(.85)
    }

    .proj .meta {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      padding: 1.8rem;
      z-index: 2;
      background: linear-gradient(transparent, rgba(10, 10, 10, .85));
      transform: translateY(8px);
      opacity: .92;
      transition: .5s var(--ease)
    }

    .proj:hover .meta {
      transform: translateY(0);
      opacity: 1
    }

    .proj .tag {
      font-size: .7rem;
      letter-spacing: .18em;
      text-transform: uppercase;
      color: var(--gray-300);
      margin-bottom: .5rem
    }

    .proj h3 {
      font-size: 1.4rem
    }

    .proj .loc {
      font-size: .85rem;
      color: var(--gray-300);
      margin-top: .3rem
    }

    /* Why DST split */
    .why {
      display: grid;
      grid-template-columns: 1.05fr 1fr;
      gap: clamp(2rem, 5vw, 5rem);
      align-items: center
    }

    .why .visual {
      position: relative;
      aspect-ratio: 4/5;
      overflow: hidden
    }

    .why .visual img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: grayscale(.4) contrast(1.05)
    }

    .why .visual .badge {
      position: absolute;
      left: 1.5rem;
      bottom: 1.5rem;
      background: var(--white);
      color: var(--black);
      padding: 1.3rem 1.6rem;
      max-width: 220px;
    }

    .why .visual .badge strong {
      font-family: var(--font-display);
      font-size: 2.2rem;
      display: block;
      line-height: 1
    }

    .why .visual .badge span {
      font-size: .82rem;
      color: var(--gray-500)
    }

    .why h2 {
      font-size: clamp(1.9rem, 3.6vw, 3.2rem);
      margin: 1.4rem 0 1.6rem
    }

    .why .points {
      display: flex;
      flex-direction: column;
      gap: 1.4rem;
      margin-top: 2rem
    }

    .why .pt {
      display: flex;
      gap: 1.2rem;
      padding-bottom: 1.4rem;
      border-bottom: 1px solid var(--line-dark)
    }

    .why .pt .ic {
      width: 40px;
      height: 40px;
      flex: none;
      border: 1px solid var(--line-dark);
      display: flex;
      align-items: center;
      justify-content: center
    }

    .why .pt .ic svg {
      width: 20px;
      height: 20px
    }

    .why .pt h4 {
      font-size: 1.1rem;
      margin-bottom: .35rem
    }

    .why .pt p {
      color: var(--gray-500);
      font-size: .94rem
    }

    /* Process */
    .process {
      background: var(--graphite);
      color: var(--white)
    }

    .process .sec-head h2 {
      color: var(--white)
    }

    .steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 0;
      counter-reset: step;
      border-top: 1px solid var(--line)
    }

    .step {
      padding: 2.4rem 1.6rem 2.4rem 1.6rem;
      border-right: 1px solid var(--line);
      position: relative
    }

    .step:first-child {
      padding-left: 0
    }

    .step:last-child {
      border-right: 0
    }

    .step .n {
      font-family: var(--font-display);
      font-size: .85rem;
      color: var(--gray-300);
      letter-spacing: .15em;
      margin-bottom: 2.5rem;
      display: block
    }

    .step h4 {
      font-size: 1.35rem;
      margin-bottom: .7rem
    }

    .step p {
      color: var(--gray-300);
      font-size: .9rem;
      font-weight: 300;
      padding-right: 1rem
    }

    .step .dot {
      position: absolute;
      top: -4px;
      left: 0;
      width: 7px;
      height: 7px;
      background: var(--white)
    }

    /* Infonavit */
    .infonavit {
      background: var(--white)
    }

    .info-card {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0;
      border: 1px solid var(--line-dark);
      overflow: hidden;
    }

    .info-card .txt {
      padding: clamp(2rem, 4vw, 3.5rem)
    }

    .info-card .txt h2 {
      font-size: clamp(1.8rem, 3.4vw, 2.8rem);
      margin: 1.2rem 0 1.2rem
    }

    .info-card .txt p {
      color: var(--gray-500);
      margin-bottom: 1.6rem;
      max-width: 46ch
    }

    .info-card .txt .creds {
      display: flex;
      gap: 1.5rem;
      flex-wrap: wrap;
      margin-bottom: 2rem
    }

    .info-card .txt .creds div {
      border-left: 2px solid var(--black);
      padding-left: 1rem
    }

    .info-card .txt .creds strong {
      font-family: var(--font-display);
      font-size: 1.2rem;
      display: block
    }

    .info-card .txt .creds span {
      font-size: .82rem;
      color: var(--gray-500)
    }

    .info-card .visual {
      position: relative;
      background: var(--black);
      min-height: 340px
    }

    .info-card .visual img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: grayscale(.4) brightness(.85)
    }

    /* FAQ */
    .faq {
      max-width: 820px;
      margin: 0 auto
    }

    .faq details {
      border-bottom: 1px solid var(--line-dark);
      padding: 1.5rem 0
    }

    .faq summary {
      list-style: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
      font-family: var(--font-display);
      font-size: 1.15rem;
      font-weight: 500
    }

    .faq summary::-webkit-details-marker {
      display: none
    }

    .faq summary .plus {
      width: 22px;
      height: 22px;
      position: relative;
      flex: none;
      transition: transform .4s var(--ease)
    }

    .faq summary .plus::before,
    .faq summary .plus::after {
      content: "";
      position: absolute;
      background: var(--black);
      transition: .3s
    }

    .faq summary .plus::before {
      top: 50%;
      left: 0;
      right: 0;
      height: 2px;
      transform: translateY(-50%)
    }

    .faq summary .plus::after {
      left: 50%;
      top: 0;
      bottom: 0;
      width: 2px;
      transform: translateX(-50%)
    }

    .faq details[open] summary .plus::after {
      transform: translateX(-50%) scaleY(0)
    }

    .faq details p {
      color: var(--gray-500);
      margin-top: 1rem;
      font-size: .98rem;
      max-width: 70ch
    }

    /* Testimonials */
    .testi {
      background: var(--paper)
    }

    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem
    }

    .quote {
      background: var(--white);
      border: 1px solid var(--line-dark);
      padding: 2.2rem;
      display: flex;
      flex-direction: column
    }

    .quote .stars {
      color: var(--black);
      letter-spacing: 2px;
      margin-bottom: 1.2rem;
      font-size: .9rem
    }

    .quote p {
      font-size: 1.05rem;
      color: var(--ink);
      margin-bottom: 1.8rem;
      flex: 1;
      line-height: 1.55
    }

    .quote .who {
      display: flex;
      align-items: center;
      gap: .9rem;
      border-top: 1px solid var(--line-dark);
      padding-top: 1.2rem
    }

    .quote .who .av {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--black);
      color: var(--white);
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--font-display);
      font-size: .95rem
    }

    .quote .who strong {
      font-size: .92rem;
      display: block
    }

    .quote .who span {
      font-size: .8rem;
      color: var(--gray-500)
    }

    .logos-row {
      display: flex;
      flex-wrap: wrap;
      gap: 2.5rem 3.5rem;
      align-items: center;
      justify-content: center;
      margin-top: 3.5rem;
      padding-top: 3rem;
      border-top: 1px solid var(--line-dark)
    }

    .logos-row span {
      font-family: var(--font-display);
      font-weight: 500;
      font-size: 1.15rem;
      color: var(--gray-300);
      letter-spacing: .02em
    }

    /* CTA / form */
    .contact {
      background: var(--black);
      color: var(--white)
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.05fr;
      gap: clamp(2rem, 5vw, 5rem)
    }

    .contact .lead h2 {
      font-size: clamp(2rem, 4.4vw, 3.6rem);
      margin: 1.4rem 0 1.4rem;
      max-width: 14ch
    }

    .contact .lead p {
      color: var(--gray-300);
      max-width: 40ch;
      margin-bottom: 2.4rem;
      font-weight: 300
    }

    .contact .promise {
      display: inline-flex;
      align-items: center;
      gap: .7rem;
      border: 1px solid var(--line);
      padding: .8rem 1.2rem;
      font-size: .85rem;
      color: var(--white);
      margin-bottom: 2.4rem
    }

    .contact .promise b {
      color: var(--wa)
    }

    .contact .details {
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
      margin-top: 1rem
    }

    .contact .details a,
    .contact .details div {
      display: flex;
      gap: .9rem;
      align-items: center;
      color: var(--gray-300);
      font-size: .95rem
    }

    .contact .details svg {
      width: 19px;
      height: 19px;
      flex: none;
      color: var(--white)
    }

    form {
      background: var(--white);
      color: var(--ink);
      padding: clamp(1.8rem, 3vw, 2.8rem)
    }

    form h3 {
      font-size: 1.3rem;
      margin-bottom: .4rem
    }

    form .sub {
      color: var(--gray-500);
      font-size: .9rem;
      margin-bottom: 1.8rem
    }

    .fld {
      margin-bottom: 1.2rem
    }

    .fld label {
      display: block;
      font-size: .78rem;
      font-weight: 600;
      letter-spacing: .05em;
      text-transform: uppercase;
      color: var(--gray-700);
      margin-bottom: .5rem
    }

    .fld input,
    .fld select,
    .fld textarea {
      width: 100%;
      padding: .85rem 1rem;
      border: 1px solid var(--line-dark);
      background: var(--paper);
      font-family: var(--font-body);
      font-size: .95rem;
      color: var(--ink);
      border-radius: 2px;
      transition: border-color .3s
    }

    .fld input:focus,
    .fld select:focus,
    .fld textarea:focus {
      outline: none;
      border-color: var(--black)
    }

    .fld.row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1rem
    }

    .fld textarea {
      resize: vertical;
      min-height: 90px
    }

    form button {
      width: 100%;
      justify-content: center;
      margin-top: .5rem
    }

    form .fineprint {
      font-size: .75rem;
      color: var(--gray-500);
      margin-top: 1rem;
      text-align: center
    }

    /* Footer */
    footer.site {
      background: var(--ink);
      color: var(--gray-300);
      padding: clamp(3.5rem, 7vh, 6rem) 0 2rem
    }

    .foot-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 2.5rem;
      padding-bottom: 3rem;
      border-bottom: 1px solid var(--line)
    }

    .foot-top .brand img {
      height: 52px;
      width: auto;
      max-width: none;
      margin-bottom: 1.4rem
    }

    .foot-top .brand p {
      font-size: .9rem;
      max-width: 32ch;
      color: var(--gray-500)
    }

    .foot-col h5 {
      font-family: var(--font-display);
      color: var(--white);
      font-size: .82rem;
      letter-spacing: .12em;
      text-transform: uppercase;
      margin-bottom: 1.2rem;
      font-weight: 500
    }

    .foot-col a,
    .foot-col p {
      display: block;
      font-size: .9rem;
      margin-bottom: .7rem;
      color: var(--gray-300);
      transition: color .3s
    }

    .foot-col a:hover {
      color: var(--white)
    }

    .foot-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 1.8rem;
      gap: 1rem;
      flex-wrap: wrap;
      font-size: .8rem;
      color: var(--gray-500)
    }

    /* Floating WhatsApp */
    .wa-float {
      position: fixed;
      right: 1.5rem;
      bottom: 1.5rem;
      z-index: 200;
      display: flex;
      align-items: center;
      gap: .7rem;
      background: var(--wa);
      color: #04331a;
      padding: .9rem 1.2rem;
      border-radius: 100px;
      font-weight: 600;
      font-size: .92rem;
      box-shadow: 0 12px 30px -8px rgba(37, 211, 102, .6);
      transition: transform .4s var(--ease), box-shadow .4s;
    }

    .wa-float:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 16px 36px -8px rgba(37, 211, 102, .75)
    }

    .wa-float svg {
      width: 24px;
      height: 24px
    }

    .wa-float .txt {
      max-width: 0;
      overflow: hidden;
      white-space: nowrap;
      transition: max-width .5s var(--ease), margin .5s
    }

    .wa-float:hover .txt {
      max-width: 150px
    }

    /* Reveal animation */
    .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity .9s var(--ease), transform .9s var(--ease)
    }

    .reveal.in {
      opacity: 1;
      transform: none
    }

    .reveal.d1 {
      transition-delay: .08s
    }

    .reveal.d2 {
      transition-delay: .16s
    }

    .reveal.d3 {
      transition-delay: .24s
    }

    .reveal.d4 {
      transition-delay: .32s
    }

    /* Accessibility: visible keyboard focus (skill checklist: focus-states) */
    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible,
    summary:focus-visible {
      outline: 2px solid var(--safety);
      outline-offset: 3px;
      border-radius: 2px;
    }

    /* Faster, more reliable taps on touch devices (skill: tap-delay) */
    .btn,
    .navlink,
    .wa-float,
    .faq summary,
    .menu-toggle,
    .svc .go {
      touch-action: manipulation;
    }

    /* Respect the user's motion preference (skill checklist: reduced-motion) */
    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto
      }

      *,
      *::before,
      *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
      }

      .reveal {
        opacity: 1 !important;
        transform: none !important
      }
    }

    /* Responsive */
    @media(max-width:1024px) {

      .grid-proj .proj.big,
      .grid-proj .proj.med,
      .grid-proj .proj.sm {
        grid-column: span 6
      }

      .why {
        grid-template-columns: 1fr
      }

      .why .visual {
        aspect-ratio: 16/10;
        order: -1
      }

      .steps {
        grid-template-columns: repeat(2, 1fr);
        border-top: 0
      }

      .step {
        border-right: 0;
        border-top: 1px solid var(--line);
        padding-left: 0
      }

      .contact-grid {
        grid-template-columns: 1fr
      }

      .foot-top {
        grid-template-columns: 1fr 1fr
      }
    }

    @media(max-width:820px) {

      header.site nav,
      header.site .actions .btn-ghost {
        display: none
      }

      .menu-toggle {
        display: flex;
        flex-shrink: 0;
        padding: .4rem 0 .4rem .5rem;
        margin-left: -.1rem
      }

      header.site .bar {
        gap: .6rem
      }

      header.site .actions {
        gap: .5rem;
        flex-shrink: 0
      }

      header.site .btn-wa {
        padding: .62rem 1rem;
        font-size: .82rem;
        gap: .45rem
      }

      header.site .btn-wa svg {
        width: 15px;
        height: 15px
      }

      header.site nav.open {
        display: flex;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: var(--paper);
        padding: 1rem var(--pad) 1.5rem;
        border-bottom: 1px solid var(--line-dark)
      }

      header.site nav.open a.navlink {
        color: var(--ink);
        padding: .9rem 0;
        border-bottom: 1px solid var(--line-dark);
        width: 100%
      }

      .services,
      .testi-grid {
        grid-template-columns: 1fr
      }

      .strip .wrap {
        grid-template-columns: 1fr 1fr
      }

      .info-card {
        grid-template-columns: 1fr
      }

      .info-card .visual {
        min-height: 220px;
        order: -1
      }

      .fld.row {
        grid-template-columns: 1fr
      }

      .foot-top {
        grid-template-columns: 1fr
      }

      .grid-proj .proj.big,
      .grid-proj .proj.med,
      .grid-proj .proj.sm {
        grid-column: span 12;
        min-height: 320px
      }

      .wa-float .txt {
        max-width: 150px
      }
    }

    /* ============================================================
       AÑADIDO — tarjetas de obra enlazables, video corporativo
       y páginas de caso de obra (obras/*.html)
       ============================================================ */

    /* --- Tarjetas de obra ahora son enlaces reales --- */
    a.proj {
      display: block;
      text-decoration: none;
      color: inherit
    }

    a.proj:focus-visible {
      outline: 2px solid var(--white);
      outline-offset: -6px
    }

    .proj .go {
      margin-top: .9rem;
      font-size: .78rem;
      font-weight: 600;
      letter-spacing: .08em;
      text-transform: uppercase;
      display: inline-flex;
      gap: .5rem;
      align-items: center;
      color: var(--white);
      opacity: 0;
      transform: translateY(6px);
      transition: .45s var(--ease)
    }

    .proj .go svg {
      width: 15px;
      transition: transform .4s var(--ease)
    }

    .proj:hover .go,
    .proj:focus-visible .go {
      opacity: 1;
      transform: translateY(0)
    }

    .proj:hover .go svg {
      transform: translateX(5px)
    }

    /* En táctil no hay hover: la señal de "esto se puede tocar" siempre visible */
    @media (hover: none) {
      .proj .go {
        opacity: 1;
        transform: none
      }
    }

    /* --- Banda de video corporativo --- */
    .videoband {
      background: var(--black);
      color: var(--white);
      border-top: 1px solid rgba(255, 255, 255, .08)
    }

    .videoband .sec-head h2 {
      color: var(--white)
    }

    .vplayer {
      position: relative;
      margin-top: clamp(2rem, 4vw, 3rem);
      aspect-ratio: 16/9;
      overflow: hidden;
      background: var(--graphite);
      cursor: pointer
    }

    .vplayer img.poster,
    .vplayer video {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover
    }

    .vplayer img.poster {
      filter: grayscale(.35) brightness(.72);
      transition: transform 1.2s var(--ease), filter .6s
    }

    .vplayer:hover img.poster {
      transform: scale(1.04);
      filter: grayscale(0) brightness(.8)
    }

    .vplayer video {
      opacity: 0;
      pointer-events: none;
      transition: opacity .5s
    }

    .vplayer.playing video {
      opacity: 1;
      pointer-events: auto
    }

    .vplayer.playing img.poster,
    .vplayer.playing .vui {
      opacity: 0;
      pointer-events: none
    }

    .vui {
      position: absolute;
      inset: 0;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 1.1rem;
      text-align: center;
      padding: 1.5rem;
      transition: opacity .4s
    }

    .vui .play {
      width: clamp(66px, 8vw, 92px);
      height: clamp(66px, 8vw, 92px);
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: rgba(255, 255, 255, .1);
      border: 1px solid rgba(255, 255, 255, .5);
      backdrop-filter: blur(6px);
      transition: .45s var(--ease)
    }

    .vplayer:hover .vui .play {
      background: var(--white);
      border-color: var(--white);
      transform: scale(1.06)
    }

    .vui .play svg {
      width: 26px;
      height: 26px;
      fill: var(--white);
      margin-left: 4px;
      transition: fill .45s
    }

    .vplayer:hover .vui .play svg {
      fill: var(--black)
    }

    .vui .label {
      font-size: .78rem;
      letter-spacing: .18em;
      text-transform: uppercase;
      color: var(--gray-300)
    }

    /* --- Páginas de caso de obra --- */
    .case-hero {
      position: relative;
      min-height: 64vh;
      display: flex;
      align-items: flex-end;
      background: var(--black);
      color: var(--white);
      overflow: hidden;
      padding-bottom: clamp(2.5rem, 6vw, 5rem);
      padding-top: 8rem
    }

    .case-hero img.bg {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: grayscale(.5) brightness(.5)
    }

    .case-hero .wrap {
      position: relative;
      z-index: 2
    }

    .case-hero h1 {
      font-size: clamp(2.2rem, 5.5vw, 4.2rem);
      line-height: 1.03;
      margin-top: .6rem;
      max-width: 18ch
    }

    .case-hero .lede {
      margin-top: 1.2rem;
      max-width: 62ch;
      color: var(--gray-300);
      font-size: clamp(1rem, 1.35vw, 1.15rem)
    }

    .crumb {
      font-size: .78rem;
      letter-spacing: .1em;
      text-transform: uppercase;
      color: var(--gray-300)
    }

    .crumb a {
      color: var(--gray-300);
      text-decoration: none;
      transition: color .3s
    }

    .crumb a:hover {
      color: var(--white)
    }

    .crumb span {
      opacity: .5;
      margin: 0 .5rem
    }

    /* Ficha técnica */
    .facts {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      border-top: 1px solid var(--line-dark);
      border-bottom: 1px solid var(--line-dark);
      padding: 2.2rem 0
    }

    .facts .f .k {
      font-size: .72rem;
      letter-spacing: .16em;
      text-transform: uppercase;
      color: var(--gray-500);
      margin-bottom: .5rem
    }

    .facts .f .v {
      font-family: var(--font-display);
      font-size: 1.15rem;
      font-weight: 600
    }

    /* Cuerpo del caso: texto + alcance */
    .case-body {
      display: grid;
      grid-template-columns: 1.15fr 1fr;
      gap: clamp(2rem, 5vw, 4.5rem);
      margin-top: clamp(2.5rem, 5vw, 4rem)
    }

    .case-body h2 {
      font-size: clamp(1.6rem, 2.6vw, 2.3rem);
      margin-bottom: 1.2rem
    }

    .case-body p {
      color: var(--gray-700);
      margin-bottom: 1.1rem;
      max-width: 66ch
    }

    .scope {
      background: var(--gray-100);
      padding: clamp(1.6rem, 3vw, 2.4rem);
      align-self: start
    }

    .scope h3 {
      font-size: 1.05rem;
      margin-bottom: 1.2rem;
      letter-spacing: .02em
    }

    .scope ul {
      list-style: none
    }

    .scope li {
      position: relative;
      padding-left: 1.6rem;
      margin-bottom: .85rem;
      font-size: .95rem;
      color: var(--gray-700);
      line-height: 1.5
    }

    .scope li::before {
      content: "";
      position: absolute;
      left: 0;
      top: .55em;
      width: 8px;
      height: 1px;
      background: var(--ink)
    }

    /* Galería — filas de altura fija + spans, para que las fotos
       verticales de obra no se recorten dentro de celdas horizontales */
    .gallery {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      grid-auto-rows: 175px;
      grid-auto-flow: dense;
      gap: 1rem;
      margin-top: clamp(2rem, 4vw, 3rem)
    }

    .gallery button {
      position: relative;
      grid-column: span 2;
      grid-row: span 2;
      overflow: hidden;
      border: 0;
      padding: 0;
      background: var(--graphite);
      cursor: zoom-in;
      display: block
    }

    .gallery button.wide {
      grid-column: span 4;
      grid-row: span 2
    }

    .gallery button.tall {
      grid-column: span 2;
      grid-row: span 3
    }

    /* Galería de una sola foto: que ocupe todo el ancho */
    .gallery.single button {
      grid-column: 1 / -1;
      grid-row: span 3
    }

    .gallery img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: grayscale(.25);
      transition: transform .9s var(--ease), filter .5s
    }

    .gallery button:hover img {
      transform: scale(1.05);
      filter: grayscale(0)
    }

    /* Lightbox */
    .lightbox {
      position: fixed;
      inset: 0;
      z-index: 200;
      background: rgba(10, 10, 10, .94);
      display: none;
      align-items: center;
      justify-content: center;
      padding: clamp(1rem, 4vw, 3rem)
    }

    .lightbox.open {
      display: flex
    }

    .lightbox img {
      max-width: 100%;
      max-height: 86vh;
      object-fit: contain
    }

    .lightbox .close,
    .lightbox .prev,
    .lightbox .next {
      position: absolute;
      background: rgba(255, 255, 255, .1);
      border: 1px solid rgba(255, 255, 255, .3);
      color: var(--white);
      width: 46px;
      height: 46px;
      display: grid;
      place-items: center;
      cursor: pointer;
      transition: background .3s
    }

    .lightbox .close:hover,
    .lightbox .prev:hover,
    .lightbox .next:hover {
      background: rgba(255, 255, 255, .25)
    }

    .lightbox .close {
      top: 1.4rem;
      right: 1.4rem;
      font-size: 1.3rem;
      line-height: 1
    }

    .lightbox .prev {
      left: 1.4rem;
      top: 50%;
      transform: translateY(-50%)
    }

    .lightbox .next {
      right: 1.4rem;
      top: 50%;
      transform: translateY(-50%)
    }

    .lightbox svg {
      width: 20px;
      stroke: currentColor;
      fill: none;
      stroke-width: 2
    }

    /* Otras obras */
    .related {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.2rem;
      margin-top: clamp(2rem, 4vw, 3rem)
    }

    .related a {
      position: relative;
      min-height: 240px;
      overflow: hidden;
      text-decoration: none;
      color: var(--white);
      background: var(--graphite);
      display: block
    }

    .related img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: grayscale(.7) brightness(.72);
      transition: transform .9s var(--ease), filter .5s
    }

    .related a:hover img {
      transform: scale(1.06);
      filter: grayscale(0) brightness(.8)
    }

    .related .m {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      z-index: 2;
      padding: 1.3rem;
      background: linear-gradient(transparent, rgba(10, 10, 10, .88))
    }

    .related .m .tag {
      font-size: .65rem;
      letter-spacing: .16em;
      text-transform: uppercase;
      color: var(--gray-300);
      margin-bottom: .35rem
    }

    .related .m h3 {
      font-size: 1.05rem;
      line-height: 1.2
    }

    /* CTA de cierre en páginas de caso */
    .case-cta {
      background: var(--black);
      color: var(--white);
      text-align: center
    }

    .case-cta h2 {
      color: var(--white);
      font-size: clamp(1.8rem, 4vw, 3rem);
      max-width: 20ch;
      margin: 0 auto
    }

    .case-cta p {
      color: var(--gray-300);
      max-width: 56ch;
      margin: 1.2rem auto 2rem
    }

    .case-cta .cta-row {
      display: flex;
      gap: 1rem;
      justify-content: center;
      flex-wrap: wrap
    }

    @media (max-width:980px) {

      .facts,
      .related {
        grid-template-columns: repeat(2, 1fr)
      }

      .case-body {
        grid-template-columns: 1fr
      }

      .gallery {
        grid-template-columns: repeat(4, 1fr)
      }

      .gallery button.wide {
        grid-column: span 4
      }
    }

    @media (max-width:640px) {
      .case-hero {
        min-height: 56vh;
        padding-top: 6.5rem
      }

      .facts {
        grid-template-columns: 1fr 1fr;
        gap: 1.2rem
      }

      .gallery {
        grid-template-columns: repeat(2, 1fr);
        grid-auto-rows: 130px
      }

      .gallery button,
      .gallery button.wide,
      .gallery button.tall {
        grid-column: span 2
      }

      .gallery button.tall {
        grid-row: span 3
      }

      .related {
        grid-template-columns: 1fr
      }

      .related a {
        min-height: 200px
      }
    }

    /* Banda alterna (galería de obra) */
    .band.alt {
      background: var(--gray-100)
    }