/* ===== RoboNexis — kinematic fold stylesheet ===== */
:root {
  --ink:         #1c252c;
  --ink-2:       #222b34;
  --ink-3:       #2b3842;
  --mint:        #cdffda;
  --mint-deep:   #3dba86;
  --mint-mid:    #7ee0a8;
  --blue:        #94b9ff;
  --blue-deep:   #5a82d4;
  --cyan:        #b4daed;
  --paper:       #f3faf6;
  --paper-2:     #e7f4ee;
  --text:        #1c252c;
  --muted:       #4a5a62;
  --on-dark:     #f4fbf7;
  --on-dark-dim: #c5d9d0;
  --line:        #cfe6da;
  --line-dark:   #334149;

  --grad:        linear-gradient(120deg, #cdffda 0%, #b4daed 48%, #94b9ff 100%);
  --grad-deep:   linear-gradient(120deg, #3dba86 0%, #5a82d4 100%);
  --radius:      20px;
  --maxw:        1160px;
  --ease:        cubic-bezier(.22,.61,.36,1);
  --shadow:      0 18px 40px -22px rgba(28,37,44,.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-optical-sizing: auto;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, .brand-name, .kicker, .eyebrow, .fold-num, .fold-label, .tile-index, .btn, .nav, .fold-kicker {
  font-family: "Space Grotesk", system-ui, -apple-system, sans-serif;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin: 0;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.grad {
  background: var(--grad-deep);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--ink); color: var(--on-dark); padding: 10px 16px; border-radius: 0 0 8px 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

.kicker, .eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--blue-deep);
  margin: 0 0 16px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 24px; border-radius: 999px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; letter-spacing: 0;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.btn-primary {
  background: var(--ink); color: var(--on-dark);
  box-shadow: 0 10px 24px -12px rgba(28,37,44,.55);
}
.btn-ghost {
  background: transparent; color: var(--ink); border-color: rgba(28,37,44,.28);
}

/* ===== Header ===== */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(243,250,246,.88);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom-color: var(--line);
  box-shadow: 0 6px 24px -18px rgba(28,37,44,.4);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand img { border-radius: 9px; width: 40px; height: 40px; object-fit: cover; }
.brand-name { font-size: 19px; font-weight: 700; color: var(--ink); letter-spacing: -0.02em; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a { font-size: 15px; color: var(--muted); font-weight: 500; letter-spacing: 0; transition: color .2s var(--ease); }
.nav .nav-cta {
  color: var(--ink); border: 1px solid var(--line); padding: 9px 18px; border-radius: 999px;
}

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .3s var(--ease), opacity .3s var(--ease); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 128px 0 180px;
  overflow: hidden;
}
.hero-wash {
  position: absolute; inset: 0;
  background: var(--grad);
  opacity: .92;
  z-index: 0;
}
.hero-wash::after {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 18% 20%, rgba(255,255,255,.45), transparent 60%),
    radial-gradient(ellipse 50% 50% at 88% 10%, rgba(148,185,255,.35), transparent 55%);
}
.hero-scan {
  position: absolute; inset: 0; z-index: 1; pointer-events: none; overflow: hidden;
}
.hero-scan::before {
  content: "";
  position: absolute; top: -20%; left: -30%;
  width: 42%; height: 140%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.38), transparent);
  transform: skewX(-18deg);
  animation: scan 7.5s var(--ease) infinite;
}
@keyframes scan {
  0% { transform: translateX(-20%) skewX(-18deg); opacity: 0; }
  12% { opacity: 1; }
  55% { opacity: .7; }
  100% { transform: translateX(280%) skewX(-18deg); opacity: 0; }
}

.hero-inner {
  position: relative; z-index: 3;
  display: grid; grid-template-columns: 1.12fr .88fr; gap: 36px; align-items: center;
}
.hero-copy { max-width: 640px; }
.hero h1 {
  font-size: clamp(2.35rem, 5.6vw, 4.15rem);
  font-weight: 700;
  color: var(--ink);
  max-width: 16ch;
}
.hero h1 em {
  font-style: italic;
  font-family: "Source Serif 4", Georgia, serif;
  font-weight: 500;
  letter-spacing: -0.02em;
  background: var(--grad-deep);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: clamp(1.02rem, 1.7vw, 1.18rem);
  color: var(--ink-2);
  margin: 22px 0 0;
  max-width: 54ch;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }

/* Articulated arm */
.hero-arm { position: relative; display: grid; place-items: center; }
.arm-svg {
  width: min(420px, 100%);
  height: auto;
  filter: drop-shadow(0 12px 28px rgba(28,37,44,.12));
}
.arm-grid circle {
  stroke: rgba(28,37,44,.14);
  stroke-width: 1;
  stroke-dasharray: 3 7;
  animation: ringspin 28s linear infinite;
  transform-origin: 180px 180px;
}
.arm-grid circle:nth-child(2) { animation-duration: 40s; animation-direction: reverse; }
.arm-grid circle:nth-child(3) { animation-duration: 18s; }
@keyframes ringspin { to { transform: rotate(360deg); } }

.arm-base rect { fill: var(--ink); }
.arm-base line {
  stroke: url(#armStroke);
  stroke-width: 7;
  stroke-linecap: round;
}
.joint {
  fill: var(--ink);
  stroke: var(--mint);
  stroke-width: 2;
}
.j0 { animation: pulse 2.4s ease-in-out infinite; transform-origin: 180px 292px; }
.j1 { animation: pulse 2.4s ease-in-out infinite .3s; }
.j2 { animation: pulse 2.4s ease-in-out infinite .6s; }
.j3 { fill: var(--mint-deep); stroke: var(--ink); }
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.18); }
}
.gripper { stroke: var(--ink); stroke-width: 3; stroke-linecap: round; }

.seg-a {
  transform-origin: 180px 292px;
  animation: swingA 8s ease-in-out infinite;
}
.seg-b {
  transform-origin: 180px 188px;
  animation: swingB 8s ease-in-out infinite;
}
.seg-c {
  transform-origin: 262px 148px;
  animation: swingC 8s ease-in-out infinite;
}
@keyframes swingA {
  0%, 100% { transform: rotate(-8deg); }
  50% { transform: rotate(10deg); }
}
@keyframes swingB {
  0%, 100% { transform: rotate(6deg); }
  50% { transform: rotate(-16deg); }
}
@keyframes swingC {
  0%, 100% { transform: rotate(-12deg); }
  50% { transform: rotate(18deg); }
}

.arm-caption {
  margin: 8px 0 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 600;
}

/* ===== Fold-out accordion (hero-adjacent) ===== */
.fold-section {
  position: relative;
  z-index: 4;
  margin-top: -120px;
  padding: 0 0 72px;
}
.fold-head { max-width: 720px; margin: 0 0 28px; }
.fold-head h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  color: var(--ink);
  margin-bottom: 12px;
}
.lead { color: var(--muted); margin: 0; max-width: 62ch; font-size: 1.05rem; }

.fold {
  display: flex;
  min-height: 460px;
  background: var(--ink);
  border-radius: 24px;
  overflow: hidden;
  color: var(--on-dark);
  box-shadow: 0 28px 60px -28px rgba(28,37,44,.55);
}
.fold-item {
  display: flex;
  flex: 0 0 78px;
  min-width: 78px;
  border-right: 1px solid var(--line-dark);
  overflow: hidden;
  transition: flex .55s var(--ease), background .4s var(--ease);
  background: #182026;
}
.fold-item:last-child { border-right: 0; }
.fold-item.open {
  flex: 1 1 auto;
  background:
    radial-gradient(ellipse 80% 70% at 80% 10%, rgba(148,185,255,.16), transparent 55%),
    radial-gradient(ellipse 50% 60% at 10% 90%, rgba(61,186,134,.14), transparent 50%),
    var(--ink-2);
}

.fold-q {
  flex: 0 0 78px;
  width: 78px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  background: none;
  border: 0;
  color: var(--on-dark);
  cursor: pointer;
  text-align: center;
}
.fold-num {
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--mint-mid);
  font-weight: 600;
}
.fold-label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--on-dark);
}
.fold-joint {
  width: 10px; height: 10px; border-radius: 50%;
  border: 2px solid var(--mint-deep);
  background: transparent;
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}
.fold-item.open .fold-joint {
  background: var(--mint-deep);
  box-shadow: 0 0 0 6px rgba(61,186,134,.22);
}

.fold-panel {
  flex: 1 1 0;
  min-width: 0;
  opacity: 0;
  transform: translateX(-18px);
  pointer-events: none;
  transition: opacity .45s var(--ease), transform .55s var(--ease);
}
.fold-item.open .fold-panel {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.fold-panel-inner {
  padding: 36px 40px 36px 12px;
  max-width: 640px;
}
.fold-kicker {
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mint-mid);
  margin: 0 0 12px;
  font-weight: 600;
}
.fold-panel h3 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--on-dark);
  margin: 0 0 14px;
}
.fold-panel p {
  color: var(--on-dark-dim);
  margin: 0 0 18px;
  font-size: 1.05rem;
}
.fold-points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.fold-points li {
  position: relative;
  padding-left: 22px;
  color: var(--on-dark);
  font-size: .98rem;
}
.fold-points li::before {
  content: "";
  position: absolute; left: 0; top: .55em;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--grad);
}

/* ===== Supporting grid ===== */
.section { padding: 88px 0; }
.section-head { max-width: 720px; margin: 0 0 36px; }
.section-head h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  margin-bottom: 12px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.tile {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px 28px;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.tile-index {
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--blue-deep);
  font-weight: 600;
}
.tile h3 { font-size: 1.35rem; }
.tile p { margin: 0; color: var(--muted); font-size: .98rem; }

/* ===== Quote band (dark, near-white text) ===== */
.quote-band {
  background: var(--ink);
  color: var(--on-dark);
  padding: 88px 0;
  position: relative;
  overflow: hidden;
}
.quote-band::before {
  content: "";
  position: absolute; inset: auto -10% -40% 40%;
  height: 80%;
  background: radial-gradient(circle, rgba(61,186,134,.22), transparent 60%);
  pointer-events: none;
}
.quote-inner { position: relative; max-width: 860px; }
.quote-mark {
  display: block;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 5.5rem;
  line-height: .5;
  color: var(--mint-mid);
  opacity: .7;
  margin-bottom: 8px;
}
.quote-inner blockquote {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: clamp(1.55rem, 3.6vw, 2.55rem);
  line-height: 1.28;
  letter-spacing: -0.03em;
  color: var(--on-dark);
}
.quote-attr {
  margin: 22px 0 0;
  color: var(--on-dark-dim);
  font-size: .98rem;
}

/* ===== FAQ ===== */
.faq-wrap { display: grid; grid-template-columns: .78fr 1.22fr; gap: 48px; align-items: start; }
.faq-head { margin: 0; position: sticky; top: 100px; }
.faq-list { display: grid; gap: 12px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.faq-item.open { border-color: var(--mint-deep); }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: none; border: 0; cursor: pointer; text-align: left; color: var(--ink);
  font-family: "Space Grotesk", sans-serif; font-size: 1.08rem; font-weight: 600; padding: 20px 22px;
  letter-spacing: -0.02em;
}
.faq-ico { position: relative; flex: 0 0 auto; width: 16px; height: 16px; }
.faq-ico::before, .faq-ico::after {
  content: ""; position: absolute; background: var(--mint-deep); border-radius: 2px;
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.faq-ico::before { top: 7px; left: 0; width: 16px; height: 2px; }
.faq-ico::after { top: 0; left: 7px; width: 2px; height: 16px; }
.faq-item.open .faq-ico::after { transform: scaleY(0); opacity: 0; }
.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .4s var(--ease);
}
.faq-item.open .faq-a { grid-template-rows: 1fr; }
.faq-a p {
  overflow: hidden;
  color: var(--muted);
  margin: 0;
  padding: 0 22px 20px;
  font-size: .98rem;
}

/* ===== Contact (dark band) ===== */
.contact-band {
  background: var(--ink-2);
  color: var(--on-dark);
  padding: 88px 0;
  border-top: 1px solid var(--line-dark);
}
.kicker-on-dark { color: var(--mint-mid); }
.contact-inner {
  display: grid;
  grid-template-columns: 1.3fr .7fr;
  gap: 48px;
  align-items: end;
}
.contact-copy h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  color: var(--on-dark);
  margin-bottom: 14px;
}
.contact-copy p { color: var(--on-dark-dim); margin: 0 0 22px; max-width: 48ch; }
.contact-email {
  display: inline-block;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.2rem, 2.4vw, 1.7rem);
  font-weight: 600;
  color: var(--on-dark);
  border-bottom: 2px solid var(--mint-deep);
  padding-bottom: 4px;
  letter-spacing: -0.02em;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.contact-meta { margin: 16px 0 0; color: var(--on-dark-dim); font-size: .95rem; }
.contact-aside {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 24px;
  background: rgba(255,255,255,.03);
}
.contact-aside-kicker {
  font-family: "Space Grotesk", sans-serif;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mint-mid);
  margin: 0 0 10px;
  font-weight: 600;
}
.contact-link {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--on-dark);
  border-bottom: 1px solid rgba(205,255,218,.4);
  display: inline-block;
}
.contact-aside-note { color: var(--on-dark-dim); margin: 14px 0 0; font-size: .95rem; }

/* ===== Footer (dark, near-white) ===== */
.site-footer {
  background: var(--ink);
  color: var(--on-dark);
  padding: 48px 0 26px;
  border-top: 1px solid var(--line-dark);
}
.site-footer .brand-name { color: var(--on-dark); }
.footer-inner {
  display: flex; justify-content: space-between; align-items: flex-start; gap: 28px; flex-wrap: wrap;
  padding-bottom: 28px; border-bottom: 1px solid var(--line-dark);
}
.footer-tag { color: var(--on-dark-dim); margin: 12px 0 0; font-size: .95rem; max-width: 36ch; }
.footer-nav { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-nav a { color: var(--on-dark-dim); font-family: "Space Grotesk", sans-serif; font-size: 15px; font-weight: 500; transition: color .2s; }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  color: var(--on-dark-dim); font-size: 14px; padding-top: 18px;
}

/* ===== Reveal (must sit before hover transforms) ===== */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .hero-scan::before,
  .seg-a, .seg-b, .seg-c, .arm-grid circle, .j0, .j1, .j2 { animation: none; }
  .fold-item, .fold-panel, .faq-a { transition: none; }
}

/* Hover AFTER .reveal.in so lift is not overwritten */
@media (hover: hover) and (pointer: fine) {
  .btn-primary:hover {
    transform: translateY(-2px);
    background: #12181c;
    box-shadow: 0 16px 32px -12px rgba(28,37,44,.6);
  }
  .btn-ghost:hover {
    transform: translateY(-2px);
    border-color: var(--ink);
    background: rgba(28,37,44,.06);
  }
  .nav a:hover { color: var(--ink); }
  .nav .nav-cta:hover { border-color: var(--mint-deep); color: var(--ink); }
  .fold-item:not(.open):hover { background: #1e2a32; }
  .fold-item:not(.open):hover .fold-label { color: var(--mint); }
  .tile:hover {
    transform: translateY(-6px);
    border-color: var(--blue-deep);
    box-shadow: var(--shadow);
  }
  .faq-q:hover { color: var(--mint-deep); }
  .faq-item:hover { box-shadow: var(--shadow); }
  .contact-email:hover { color: var(--mint); border-bottom-color: var(--mint); }
  .contact-link:hover { color: var(--mint); }
  .footer-nav a:hover { color: var(--on-dark); }
}

/* ===== Responsive ===== */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 20px; }
  .hero-arm { order: -1; }
  .arm-svg { width: min(280px, 70vw); }
  .hero { padding: 118px 0 150px; }
  .field-grid { grid-template-columns: 1fr 1fr; }
  .faq-wrap { grid-template-columns: 1fr; gap: 24px; }
  .faq-head { position: static; }
  .contact-inner { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed; inset: 74px 0 auto 0; flex-direction: column; gap: 4px; align-items: stretch;
    background: rgba(243,250,246,.98); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line);
    padding: 12px 24px 22px; transform: translateY(-120%); transition: transform .35s var(--ease); z-index: 90;
  }
  .nav.open { transform: translateY(0); }
  .nav a { padding: 12px 4px; font-size: 17px; border-bottom: 1px solid var(--line); color: var(--ink); }
  .nav .nav-cta { text-align: center; margin-top: 10px; border: 1px solid var(--ink); }

  .hero { padding: 112px 0 48px; }
  .hero h1 { max-width: none; }
  .fold-section { margin-top: 8px; padding: 28px 0 56px; }
  .fold-head { margin-bottom: 20px; }

  .fold {
    flex-direction: column;
    min-height: 0;
    border-radius: 18px;
  }
  .fold-item {
    flex: none;
    min-width: 0;
    flex-direction: column;
    border-right: 0;
    border-bottom: 1px solid var(--line-dark);
  }
  .fold-item:last-child { border-bottom: 0; }
  .fold-q {
    width: 100%;
    flex: none;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 14px;
    padding: 16px 18px;
    text-align: left;
  }
  .fold-label {
    writing-mode: horizontal-tb;
    transform: none;
    font-size: 16px;
  }
  .fold-joint { margin-left: auto; }

  .fold-panel {
    display: grid;
    grid-template-rows: 0fr;
    flex: none;
    opacity: 1;
    transform: none;
    pointer-events: none;
    transition: grid-template-rows .45s var(--ease);
  }
  .fold-item.open .fold-panel {
    grid-template-rows: 1fr;
    pointer-events: auto;
  }
  .fold-panel-inner {
    overflow: hidden;
    padding: 0 18px 20px 18px;
    max-width: none;
  }
  .fold-panel h3 { font-size: 1.35rem; }

  .section { padding: 64px 0; }
  .quote-band, .contact-band { padding: 64px 0; }
  .field-grid { grid-template-columns: 1fr; gap: 12px; }
  .tile { min-height: 0; padding: 22px 20px; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero { padding: 104px 0 40px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  .arm-caption { text-align: center; }
  .footer-inner { flex-direction: column; }
  .quote-mark { font-size: 4rem; }
}