/* =========================================================
   Aether — Minimal Electronics Landing Page
   Design language: generous whitespace, restrained palette,
   a single warm accent, quiet type-driven hierarchy.
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
  --bg:            #faf9f7;
  --bg-alt:        #f2f0ec;
  --surface:       #ffffff;
  --ink:           #14120f;
  --ink-soft:      #55524c;
  --ink-faint:     #6b675f;
  --border:        #e4e1da;
  --border-strong: #d3cfc5;
  --accent:        #ff5a2b;
  --accent-hover:  #ff7550;
  --accent-text:   #c73f19;
  --accent-tint:   #fff0e8;

  --shadow-rgb: 20, 18, 15;
  --shadow-sm: 0 8px 30px -20px rgba(var(--shadow-rgb), 0.25);
  --shadow-md: 0 24px 45px -30px rgba(var(--shadow-rgb), 0.35);
  --shadow-lg: 0 30px 55px -30px rgba(var(--shadow-rgb), 0.4);
  --shadow-xl: 0 30px 60px -30px rgba(var(--shadow-rgb), 0.5);

  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, -apple-system, sans-serif;

  --container: 1220px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: .6s;
  --dur-fast: .3s;
  --dur-base: .4s;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}
body, h1, h2, h3, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input { font: inherit; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--ink);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; top: -100%; left: 1rem;
  background: var(--ink); color: var(--bg);
  padding: .75rem 1.25rem; border-radius: var(--radius-sm);
  z-index: 1000; transition: top .2s var(--ease);
}
.skip-link:focus { top: 1rem; }

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

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- Reveal-on-scroll ---------- */
[data-animate] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .9rem 1.7rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .95rem;
  white-space: nowrap;
  transition: transform .35s var(--ease), background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--ink);
  color: var(--bg);
}
.btn--primary:hover { background: var(--accent); color: var(--ink); }

.btn--outline {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--border-strong);
}
.btn--outline:hover { border-color: var(--ink); background: var(--surface); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid transparent;
}
.btn--ghost:hover { border-color: var(--border-strong); }

.btn--text {
  color: var(--ink);
  gap: .4rem;
  padding: .9rem .25rem;
}
.btn--text svg { transition: transform .35s var(--ease); }
.btn--text:hover svg { transform: scale(1.12); }

.btn--sm { padding: .55rem 1.1rem; font-size: .85rem; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(250, 249, 247, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.site-header.is-scrolled {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 82px;
}

.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}
.nav__logo-mark {
  width: 12px; height: 12px;
  border-radius: 3px;
  background: var(--accent);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.nav__links {
  display: none;
  align-items: center;
  gap: 2.4rem;
  font-size: .95rem;
  font-weight: 500;
}
.nav__links a {
  position: relative;
  color: var(--ink-soft);
  transition: color .25s var(--ease);
}
.nav__links a::after {
  content: '';
  position: absolute; left: 0; right: 0; bottom: -6px;
  height: 1.5px; background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-fast) var(--ease);
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { transform: scaleX(1); }

.nav__actions { display: flex; align-items: center; gap: 1rem; }
.nav__cta-desktop { display: none; }

.nav__toggle {
  display: flex; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px;
}
.nav__toggle span {
  display: block; width: 22px; height: 1.5px; background: var(--ink);
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
  margin-inline: auto;
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (min-width: 900px) {
  .nav__links { display: flex; }
  .nav__cta-desktop { display: inline-flex; }
  .nav__toggle { display: none; }
}

@media (max-width: 899px) {
  .nav__links {
    position: fixed;
    inset: 82px 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: .5rem var(--gutter) 1.5rem;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  }
  .nav__links.is-open {
    display: flex;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav__links li { width: 100%; border-top: 1px solid var(--border); }
  .nav__links a { display: block; padding: 1rem 0; }
}

/* ---------- Eyebrow / section heads ---------- */
.eyebrow {
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent-text);
  margin-bottom: .9rem;
}

.section-head {
  max-width: 640px;
  margin-bottom: clamp(2.5rem, 6vw, 4.5rem);
}
.section-head h2 { font-size: clamp(1.9rem, 3.4vw, 2.8rem); }
.section-lede {
  margin-top: 1.1rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 52ch;
}

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  padding-top: clamp(2.5rem, 6vw, 5rem);
  padding-bottom: clamp(3rem, 7vw, 6rem);
  align-items: center;
}

.hero__copy h1 {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
}
.hero__copy em {
  font-style: normal;
  color: var(--accent-text);
}
.hero__lede {
  margin-top: 1.5rem;
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 46ch;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 2rem;
  margin-top: 2.2rem;
}

.hero__proof {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 1.5rem 2.2rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  max-width: 46ch;
}
.hero__proof dt {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
}
.hero__proof dd {
  color: var(--ink-faint);
  font-size: .82rem;
  margin-top: .2rem;
}

.hero__visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-alt);
  aspect-ratio: 9 / 10;
}
.hero__visual img {
  width: 100%; height: 100%; object-fit: cover;
}
.hero__badge {
  position: absolute;
  left: 1.2rem; bottom: 1.2rem;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(6px);
  padding: .6rem 1rem;
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  box-shadow: 0 10px 30px -12px rgba(var(--shadow-rgb), 0.35);
}
.hero__badge-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #2fa86a;
  box-shadow: 0 0 0 0 rgba(47,168,106,.6);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(47,168,106,.5); }
  70% { box-shadow: 0 0 0 8px rgba(47,168,106,0); }
  100% { box-shadow: 0 0 0 0 rgba(47,168,106,0); }
}

@media (min-width: 960px) {
  .hero {
    grid-template-columns: 1.05fr .95fr;
    gap: 4rem;
  }
}

/* ---------- Trust bar ---------- */
.trustbar {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.6rem 0;
}
.trustbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem 2.5rem;
}
.trustbar__inner > span {
  font-size: .8rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 600;
}
.trustbar__inner ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1.8rem 2.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink-soft);
}

/* ---------- Features ---------- */
.features { padding-block: clamp(4rem, 9vw, 7rem); }
.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 640px) {
  .features__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1000px) {
  .features__grid { grid-template-columns: repeat(3, 1fr); }
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}
.feature-card__icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--accent-tint);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.3rem;
}
.feature-card__icon i { width: 22px; height: 22px; }
.feature-card h3 { font-size: 1.15rem; margin-bottom: .6rem; }
.feature-card p { color: var(--ink-soft); font-size: .95rem; }

/* ---------- Showcase / Products ---------- */
.showcase { padding-block: clamp(4rem, 9vw, 7rem); }
.showcase__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 760px) {
  .showcase__grid { grid-template-columns: repeat(3, 1fr); }
}

.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease);
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.product-card__media {
  aspect-ratio: 1/1;
  background: var(--bg-alt);
  overflow: hidden;
}
.product-card__media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .6s var(--ease);
}
.product-card:hover .product-card__media img { transform: scale(1.05); }

.product-card__body { padding: 1.8rem; }
.product-card__tag {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--accent-text);
  margin-bottom: .6rem;
}
.product-card__body h3 { font-size: 1.3rem; margin-bottom: .5rem; }
.product-card__body p { color: var(--ink-soft); font-size: .92rem; margin-bottom: 1.4rem; }
.product-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
}
.product-card__meta .price {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
}

/* ---------- Benefits (alternating rows) ---------- */
.benefits { background: var(--bg-alt); padding-block: clamp(4rem, 9vw, 7rem); }
.benefit-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
  padding-block: clamp(2rem, 5vw, 3.5rem);
}
.benefit-row:not(:last-child) { border-bottom: 1px solid var(--border); }

.benefit-row__media {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--surface);
}
.benefit-row__media img { width: 100%; height: 100%; object-fit: cover; }
.benefit-row__copy h3 { font-size: clamp(1.5rem, 2.5vw, 2rem); margin-bottom: 1rem; }
.benefit-row__copy p { color: var(--ink-soft); font-size: 1.02rem; max-width: 48ch; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin-top: 1.4rem;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1.5px solid var(--accent);
  padding-bottom: 2px;
}
.link-arrow::after { content: '→'; transition: transform var(--dur-fast) var(--ease); }
.link-arrow:hover::after { transform: translateX(4px); }

@media (min-width: 860px) {
  .benefit-row { grid-template-columns: 1fr 1fr; gap: 4rem; }
  .benefit-row--reverse .benefit-row__media { order: 2; }
}

/* ---------- Stats ---------- */
.stats { padding-block: clamp(3.5rem, 8vw, 6rem); }
.stats__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
  text-align: center;
}
@media (min-width: 760px) {
  .stats__grid { grid-template-columns: repeat(4, 1fr); }
}
.stat__number {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  color: var(--accent-text);
}
.stat__label {
  margin-top: .6rem;
  color: var(--ink-soft);
  font-size: .9rem;
}

/* ---------- Testimonials ---------- */
.testimonials { padding-block: clamp(4rem, 9vw, 7rem); }
.testimonials__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 700px) {
  .testimonials__grid { grid-template-columns: repeat(2, 1fr); }
}

.testimonial-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}
.testimonial-card blockquote {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink);
}
.testimonial-card figcaption {
  display: flex;
  align-items: center;
  gap: .8rem;
}
.testimonial-card img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.testimonial-card .name { display: block; font-weight: 600; font-size: .92rem; }
.testimonial-card .role { display: block; color: var(--ink-faint); font-size: .82rem; }

/* ---------- Pricing ---------- */
.pricing { padding-block: clamp(4rem, 9vw, 7rem); }
.pricing__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (min-width: 860px) {
  .pricing__grid { grid-template-columns: repeat(3, 1fr); }
}

.price-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.4rem;
  position: relative;
  transition: transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease);
}
.price-card:hover { transform: translateY(-4px); }
.price-card--featured {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
  box-shadow: var(--shadow-xl);
}
.price-card--featured .price-card__desc { color: #cfccc4; }
.price-card--featured li { color: #e8e6e0; }
.price-card--featured .btn--primary { background: var(--accent); color: var(--ink); }
.price-card--featured .btn--primary:hover { background: var(--accent-hover); color: var(--ink); }

.price-card__badge {
  position: absolute; top: -14px; left: 2rem;
  background: var(--accent);
  color: var(--ink);
  font-size: .75rem;
  font-weight: 700;
  padding: .35rem .9rem;
  border-radius: 999px;
}
.price-card h3 { font-size: 1.3rem; margin-bottom: .4rem; }
.price-card__desc { color: var(--ink-soft); font-size: .92rem; margin-bottom: 1.6rem; }
.price-card__price {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 1.8rem;
}
.price-card__price span {
  font-family: var(--font-body);
  font-size: .85rem;
  font-weight: 500;
  color: var(--ink-faint);
  margin-left: .4rem;
}
.price-card--featured .price-card__price span { color: #b9b6ae; }
.price-card ul { margin-bottom: 2rem; display: flex; flex-direction: column; gap: .8rem; }
.price-card li {
  display: flex; align-items: center; gap: .6rem;
  font-size: .92rem; color: var(--ink-soft);
}
.price-card li i { width: 17px; height: 17px; color: var(--accent); flex-shrink: 0; }
.price-card .btn { width: 100%; }

/* ---------- FAQ ---------- */
.faq { padding-block: clamp(4rem, 9vw, 7rem); }
.faq__head { max-width: 640px; margin-bottom: 2.5rem; }
.faq__list { max-width: 760px; }

.faq-item { border-bottom: 1px solid var(--border); }
.faq-item__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0;
  text-align: left;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
}
.faq-item__trigger i {
  width: 20px; height: 20px;
  flex-shrink: 0;
  color: var(--accent);
  transition: transform .35s var(--ease);
}
.faq-item__trigger[aria-expanded="true"] i { transform: rotate(45deg); }

.faq-item__panel {
  display: grid;
  grid-template-rows: 0fr;
  overflow: hidden;
  transition: grid-template-rows var(--dur-base) var(--ease);
}
.faq-item__panel > p {
  min-height: 0;
  overflow: hidden;
  color: var(--ink-soft);
  padding-bottom: 1.5rem;
  max-width: 62ch;
}
.faq-item.is-open .faq-item__panel { grid-template-rows: 1fr; }

/* ---------- CTA ---------- */
.cta {
  background: var(--ink);
  color: var(--bg);
  padding-block: clamp(4rem, 9vw, 7rem);
}
.cta__inner { max-width: 620px; text-align: left; }
.cta h2 { color: var(--bg); font-size: clamp(1.9rem, 3.6vw, 2.6rem); margin-bottom: 1rem; }
.cta > .container > p { color: #c9c6be; font-size: 1.05rem; margin-bottom: 2.2rem; }

.cta__field {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
}
.cta__field input {
  flex: 1 1 240px;
  padding: .95rem 1.3rem;
  border-radius: 999px;
  border: 1.5px solid #3a3833;
  background: #201e1a;
  color: var(--bg);
}
.cta__field input::placeholder { color: #9c988e; }
.cta__field input:focus { border-color: var(--accent); }
.cta__field .btn--primary { background: var(--accent); color: var(--ink); flex-shrink: 0; }
.cta__field .btn--primary:hover { background: var(--accent-hover); color: var(--ink); }

.cta__note { margin-top: 1rem; font-size: .82rem; color: #8f8c83; }
.cta__note.is-success { color: #6ee7a8; }
.cta__note.is-error { color: #ff9d80; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-alt);
  padding-top: clamp(3.5rem, 7vw, 5rem);
  border-top: 1px solid var(--border);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
}
@media (min-width: 760px) {
  .footer__grid { grid-template-columns: 1.6fr repeat(3, 1fr); }
}
.footer__brand p {
  margin-top: 1rem;
  color: var(--ink-soft);
  font-size: .92rem;
  max-width: 34ch;
}
.footer__social {
  display: flex;
  gap: .8rem;
  margin-top: 1.5rem;
}
.footer__social a {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.footer__social a:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.footer__social i { width: 17px; height: 17px; }

.footer__col h3 {
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 700;
  color: var(--ink-faint);
  margin-bottom: 1.2rem;
}
.footer__col ul { display: flex; flex-direction: column; gap: .8rem; }
.footer__col a { color: var(--ink-soft); font-size: .92rem; transition: color .25s var(--ease); }
.footer__col a:hover { color: var(--accent); }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.6rem;
  border-top: 1px solid var(--border);
  font-size: .82rem;
  color: var(--ink-faint);
}
.footer__bottom ul { display: flex; gap: 1.6rem; }
.footer__bottom a:hover { color: var(--ink); }

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 1.5rem; bottom: 1.5rem;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--bg);
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
  z-index: 400;
}
.back-to-top.is-visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { background: var(--accent); }
.back-to-top i { width: 20px; height: 20px; }