/* ==========================================================================
   STEPH TATUA — Portfolio de tatuadora
   Design tokens
   ========================================================================== */
:root {
  --primary: #2ecc71;      /* verde — acento de trazo / brillo, estilo Cosmo */
  --accent: #e0218a;       /* rosa — llamadas a la acción, hover, estilo Wanda */
  --bg: #ffffff;
  --text: #333333;
  --secondary: #0f3d2e;    /* verde bosque oscuro — tinta, nav, footer */
  --secondary-soft: #17573f;
  --line: #e7e4e1;
  --bg-soft: #faf9f8;

  --font-display: "Bebas Neue", "Arial Narrow", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;

  --max-w: 1180px;
  --gap: clamp(1.5rem, 4vw, 3rem);
  --radius: 2px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

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

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

button { font-family: inherit; cursor: pointer; border: none; background: none; }

input, textarea, select { font-family: inherit; font-size: 1rem; }

ul { list-style: none; }

.container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1.05;
  color: var(--secondary);
  text-transform: uppercase;
}

h2 { font-size: clamp(2.2rem, 5vw, 3.4rem); margin-top: 0.4rem; }
h3 { font-size: clamp(1.3rem, 3vw, 1.7rem); }

p.lede {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: var(--text);
  max-width: 60ch;
}

.section {
  padding-block: clamp(4rem, 9vw, 7rem);
}

.section--soft { background: var(--bg-soft); }

.section-head {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.95rem 1.6rem;
  border-radius: var(--radius);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease), box-shadow 0.25s var(--ease);
  white-space: nowrap;
}

.btn--solid {
  background: var(--secondary);
  color: #fff;
}
.btn--solid:hover {
  background: var(--accent);
  color: var(--secondary);
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--secondary);
  box-shadow: inset 0 0 0 1.5px var(--secondary);
}
.btn--outline:hover {
  box-shadow: inset 0 0 0 1.5px var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn--ghost-light {
  background: transparent;
  color: #fff;
  box-shadow: inset 0 0 0 1.5px rgba(255,255,255,0.55);
}
.btn--ghost-light:hover {
  box-shadow: inset 0 0 0 1.5px var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  background: rgba(255,255,255,0.86);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s var(--ease);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.03em;
  color: var(--secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav__logo span { color: var(--accent); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 2.4rem;
}

.nav__links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  position: relative;
  padding-bottom: 4px;
}

.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0%;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s var(--ease);
}

.nav__links a:hover::after,
.nav__links a.is-active::after {
  width: 100%;
}

.nav__links a.is-active { color: var(--secondary); font-weight: 600; }

.nav__cta { margin-left: 0.5rem; }

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  z-index: 210;
}

.nav__toggle span {
  width: 100%;
  height: 2px;
  background: var(--secondary);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed;
    top: 76px;
    right: 0;
    height: calc(100vh - 76px);
    width: min(78vw, 320px);
    background: var(--secondary);
    flex-direction: column;
    align-items: flex-start;
    padding: 2.5rem 2rem;
    gap: 1.8rem;
    transform: translateX(100%);
    transition: transform 0.35s var(--ease);
  }
  .nav__links.is-open { transform: translateX(0); }
  .nav__links a { color: #fff; font-size: 1rem; }
  .nav__links a::after { background: var(--primary); }
  .nav__cta { margin-left: 0; margin-top: 0.5rem; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--secondary);
  overflow: hidden;
  padding-top: 76px;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15,61,46,0.35) 0%, rgba(15,61,46,0.65) 70%, rgba(15,61,46,0.92) 100%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin-inline: auto;
  padding: clamp(2rem, 6vw, 3rem) clamp(1.25rem, 4vw, 2.5rem);
  width: 100%;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

.hero__text { min-width: 0; }

.hero__frame {
  position: relative;
  justify-self: center;
  width: 100%;
  max-width: 360px;
  padding: 12px;
  background: rgba(255,255,255,0.04);
  border: 2px solid var(--primary);
  box-shadow: 12px 12px 0 var(--accent);
  transform: rotate(-2.5deg);
  transition: transform 0.4s var(--ease);
}

.hero__frame:hover { transform: rotate(0deg); }

.hero__frame img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
}

.hero__frame figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  text-align: center;
}
.hero__frame figcaption span { color: var(--primary); }

@media (max-width: 860px) {
  .hero__content {
    grid-template-columns: 1fr;
    text-align: left;
  }
  .hero__frame {
    max-width: 260px;
    transform: rotate(-2deg);
    margin-top: 0.5rem;
  }
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.2rem;
}

.hero__eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 12px 2px var(--primary);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.75); }
}

.hero h1 {
  font-size: clamp(3rem, 10vw, 7rem);
  color: #fff;
  line-height: 0.95;
}

.hero h1 em {
  font-style: normal;
  color: var(--primary);
}

.hero p.lede {
  color: rgba(255,255,255,0.82);
  margin-top: 1.4rem;
  max-width: 46ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.4rem;
}

.hero__meta {
  position: absolute;
  bottom: clamp(1.5rem, 4vw, 2.5rem);
  right: clamp(1.25rem, 4vw, 2.5rem);
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.65);
  text-align: right;
  letter-spacing: 0.04em;
  display: none;
}

@media (min-width: 700px) {
  .hero__meta { display: block; }
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: clamp(1.5rem, 4vw, 2.2rem);
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255,255,255,0.6);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.scroll-cue__line {
  width: 1px;
  height: 32px;
  background: linear-gradient(180deg, var(--primary), transparent);
  animation: cue-move 1.8s ease-in-out infinite;
}

@keyframes cue-move {
  0% { transform: scaleY(0.3); opacity: 0.4; transform-origin: top; }
  50% { transform: scaleY(1); opacity: 1; transform-origin: top; }
  100% { transform: scaleY(0.3); opacity: 0.4; transform-origin: top; }
}

/* ==========================================================================
   Page header (galeria / contacto)
   ========================================================================== */
.page-header {
  padding: clamp(7.5rem, 14vw, 10rem) 0 clamp(3rem, 6vw, 4rem);
  background: var(--secondary);
  position: relative;
  overflow: hidden;
}

.page-header::after {
  content: "";
  position: absolute;
  right: -8%;
  top: -20%;
  width: 420px;
  height: 420px;
  border: 1px solid rgba(51,255,153,0.18);
  border-radius: 50%;
}

.page-header .eyebrow { color: var(--primary); }
.page-header .eyebrow::before { background: var(--primary); }
.page-header h1 {
  color: #fff;
  font-size: clamp(2.8rem, 8vw, 5.2rem);
  margin-top: 0.5rem;
}
.page-header p.lede { color: rgba(255,255,255,0.78); margin-top: 1rem; }

/* ==========================================================================
   Fade-in on scroll
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-stagger.is-visible > * {
  transition-delay: calc(var(--i, 0) * 90ms);
}

/* ==========================================================================
   About section
   ========================================================================== */
.about {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}

.about__figure {
  position: relative;
}

.about__figure img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  border-radius: var(--radius);
}

.about__tag {
  position: absolute;
  bottom: -18px;
  left: -18px;
  background: var(--secondary);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: 0.9rem 1.2rem;
  box-shadow: 0 10px 30px rgba(15,61,46,0.25);
}
.about__tag strong { color: var(--primary); display: block; font-family: var(--font-display); font-size: 1.4rem; letter-spacing: 0.02em;}

.about__body p.lede { margin-bottom: 1.4rem; }

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.8rem;
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid var(--secondary);
  color: var(--secondary);
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  transition: all 0.25s var(--ease);
}
.chip:hover {
  background: var(--secondary);
  color: #fff;
}

@media (max-width: 860px) {
  .about { grid-template-columns: 1fr; }
  .about__figure { max-width: 340px; margin-inline: auto; }
}

/* ==========================================================================
   Proceso (process steps — real sequence, numbering justified)
   ========================================================================== */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.process__step {
  background: var(--bg);
  padding: clamp(1.8rem, 3vw, 2.4rem);
  position: relative;
}

.process__num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.process__step h3 { margin-top: 0.9rem; }
.process__step p { margin-top: 0.6rem; font-size: 0.95rem; color: var(--text); }

@media (max-width: 860px) {
  .process { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .process { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Why / points
   ========================================================================== */
.points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.point {
  padding: clamp(1.6rem, 3vw, 2.2rem);
  background: var(--bg);
  border: 1px solid var(--line);
  border-top: 3px solid var(--primary);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.point:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(15,61,46,0.08);
}
.point__icon {
  width: 38px; height: 38px;
  color: var(--secondary);
  margin-bottom: 1rem;
}
.point h3 { font-size: 1.15rem; }
.point p { margin-top: 0.5rem; font-size: 0.95rem; }

@media (max-width: 760px) {
  .points { grid-template-columns: 1fr; }
}

/* ==========================================================================
   CTA banner
   ========================================================================== */
.cta-banner {
  background: var(--secondary);
  color: #fff;
  padding: clamp(3rem, 7vw, 5rem) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner h2 { color: #fff; }
.cta-banner p.lede { color: rgba(255,255,255,0.78); margin-inline: auto; margin-top: 0.8rem; }
.cta-banner__actions {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   Gallery
   ========================================================================== */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.6rem 1.1rem;
  border: 1px solid var(--secondary);
  color: var(--secondary);
  border-radius: 999px;
  transition: all 0.25s var(--ease);
}
.filter-btn:hover { color: var(--accent); border-color: var(--accent); }
.filter-btn.is-active {
  background: var(--secondary);
  color: #fff;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(0.8rem, 2vw, 1.4rem);
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  cursor: pointer;
  aspect-ratio: 1/1;
  background: var(--bg-soft);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.gallery-item:hover img { transform: scale(1.08); }

.gallery-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(15,61,46,0.85) 0%, rgba(15,61,46,0) 55%);
  display: flex;
  align-items: flex-end;
  padding: 1rem;
  opacity: 0;
  transition: opacity 0.35s var(--ease);
}
.gallery-item:hover .gallery-item__overlay { opacity: 1; }

.gallery-item__overlay span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
}

.gallery-item.is-hidden { display: none; }

@media (max-width: 860px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .gallery-grid { grid-template-columns: 1fr 1fr; gap: 0.6rem; }
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(20,4,4,0.94);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease);
  padding: 2rem;
}
.lightbox.is-open { opacity: 1; visibility: visible; }

.lightbox__figure {
  max-width: min(900px, 92vw);
  max-height: 86vh;
  position: relative;
  text-align: center;
}
.lightbox__figure img {
  max-width: 100%;
  max-height: 78vh;
  object-fit: contain;
  margin-inline: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.lightbox__caption {
  color: rgba(255,255,255,0.75);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-top: 1rem;
  letter-spacing: 0.04em;
}

.lightbox__close,
.lightbox__prev,
.lightbox__next {
  position: absolute;
  color: #fff;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  transition: all 0.25s var(--ease);
}
.lightbox__close:hover,
.lightbox__prev:hover,
.lightbox__next:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.lightbox__close { top: -60px; right: 0; }
.lightbox__prev { left: clamp(-60px, -8vw, -20px); top: 50%; transform: translateY(-50%); }
.lightbox__next { right: clamp(-60px, -8vw, -20px); top: 50%; transform: translateY(-50%); }

@media (max-width: 760px) {
  .lightbox__close { top: -50px; }
  .lightbox__prev { left: 0; }
  .lightbox__next { right: 0; }
}

/* ==========================================================================
   Contact page
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2.5rem, 6vw, 4.5rem);
  align-items: flex-start;
}

.form-field {
  margin-bottom: 1.4rem;
}

.form-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--secondary);
  margin-bottom: 0.5rem;
}

.form-field input,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  color: var(--text);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--secondary);
  background: #fff;
}

.form-field textarea { resize: vertical; min-height: 130px; }

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

.form-error {
  display: none;
  font-size: 0.8rem;
  color: var(--accent);
  margin-top: 0.4rem;
}
.form-field.has-error .form-error { display: block; }

.form-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #7a7a7a;
  margin-top: -0.4rem;
  margin-bottom: 1.4rem;
}

.form-status {
  display: none;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--primary);
  background: var(--bg-soft);
  font-size: 0.92rem;
  margin-top: 1.2rem;
}
.form-status.is-visible { display: block; }
.form-status.is-error { border-left-color: var(--accent); }

.info-card {
  background: var(--secondary);
  color: #fff;
  padding: clamp(1.8rem, 4vw, 2.6rem);
  border-radius: var(--radius);
}

.info-card h3 { color: #fff; margin-bottom: 1.2rem; }

.info-list li {
  display: flex;
  gap: 0.8rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.14);
  font-size: 0.94rem;
}
.info-list li:last-child { border-bottom: none; }
.info-list strong {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  min-width: 90px;
  display: inline-block;
}

.map-wrap {
  margin-top: 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16/10;
}
.map-wrap iframe {
  width: 100%; height: 100%; border: 0; display: block;
}

@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--secondary);
  color: rgba(255,255,255,0.7);
  padding: 1.8rem 0;
}
.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
}
.footer__social {
  display: flex;
  gap: 1.1rem;
}
.footer__social a {
  color: rgba(255,255,255,0.7);
  transition: color 0.25s var(--ease), transform 0.25s var(--ease);
  display: inline-flex;
}
.footer__social a:hover { color: var(--primary); transform: translateY(-2px); }
.footer__social svg { width: 18px; height: 18px; }

/* ==========================================================================
   Back to top
   ========================================================================== */
.to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--secondary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 150;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s var(--ease);
  box-shadow: 0 10px 24px rgba(15,61,46,0.25);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--accent); color: var(--secondary); }
.to-top svg { width: 20px; height: 20px; }

/* ==========================================================================
   Focus visibility (accessibility)
   ========================================================================== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Utility */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}