@import url('fonts.css');
@import url('colors_and_type.css');

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; max-width: 100%; }
body {
  background: var(--bg);
  background-image: var(--bg-grid);
  background-attachment: fixed;
  color: var(--fg1);
  font-family: var(--font-display);
  line-height: 1.6;
  cursor: crosshair;
  overflow-x: hidden;
  max-width: 100%;
}
img, svg, video { max-width: 100%; }

::selection { background: var(--accent); color: var(--bg); }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: crosshair; }

/* ──────── PULSE BANNER ──────── */
.kat-pulse {
  position: fixed; top: 0; left: 0; right: 0; z-index: 110;
  height: 28px;
  background: var(--accent); color: var(--bg);
  font-family: var(--font-mono); font-size: 11px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  display: flex; align-items: center; overflow: hidden;
  border-bottom: 2px solid var(--bg);
}
.kat-pulse__track {
  display: flex; gap: 48px; padding-left: 48px;
  animation: pulseScroll 38s linear infinite;
  white-space: nowrap;
}
.kat-pulse__track span { display: inline-flex; align-items: center; gap: 12px; }
.kat-pulse__dot { width: 6px; height: 6px; background: var(--bg); display: inline-block; }
@keyframes pulseScroll { from { transform: translateX(0);} to { transform: translateX(-50%);} }

/* ──────── NAV ──────── */
.kat-nav {
  position: fixed; top: 28px; left: 0; right: 0; z-index: 100;
  background: var(--bg);
  border-bottom: 2px solid var(--accent);
  height: 56px;
  padding: 0 var(--gutter);
  display: flex; align-items: center; justify-content: space-between;
}
.kat-nav__logo { display: flex; align-items: center; gap: 12px; }
.kat-nav__k {
  font-family: var(--font-display); font-size: 24px; font-weight: 700;
  color: transparent; -webkit-text-stroke: 1.5px var(--accent);
  line-height: 1;
}
.kat-nav__name {
  font-family: var(--font-mono); font-size: 12px; font-weight: 700;
  letter-spacing: 0.08em; color: var(--fg1);
}
.kat-nav__status {
  font-family: var(--font-mono); font-size: 10px; color: var(--fg2);
  letter-spacing: 0.1em; text-transform: uppercase;
  display: flex; align-items: center; gap: 8px;
}
.kat-nav__status::before {
  content: ''; width: 8px; height: 8px; background: var(--accent);
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink { 0%, 100% { opacity: 1;} 50% { opacity: 0.3;} }

.kat-nav__links { display: flex; gap: 0; list-style: none; height: 100%; }
.kat-nav__links a {
  display: flex; align-items: center; padding: 0 18px; height: 56px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 400;
  color: var(--fg2); letter-spacing: 0.1em; text-transform: uppercase;
  border-left: 1px solid var(--border);
  transition: color .15s, background .15s;
}
.kat-nav__links a:hover { color: var(--accent); background: rgba(220,255,30,0.04); }
.kat-nav__cta {
  margin-left: 16px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--bg); background: var(--accent);
  padding: 0 16px; height: 36px; align-self: center;
  display: inline-flex; align-items: center; gap: 8px;
}
.kat-nav__cta:hover { background: var(--fg1); }

/* ──────── BUTTONS ──────── */
.kat-btn {
  font-family: var(--font-display); font-weight: 600;
  font-size: 14px; letter-spacing: 0.01em;
  padding: 16px 22px;
  border: 2px solid transparent;
  display: inline-flex; align-items: center; gap: 12px;
  cursor: crosshair;
  transition: background .15s, color .15s, border-color .15s;
}
.kat-btn--primary { background: var(--fg1); color: var(--bg); }
.kat-btn--primary:hover {
  background: var(--bg); color: var(--fg1); border-color: var(--accent);
}
.kat-btn--ghost {
  background: transparent; color: var(--fg1); border-color: var(--accent);
  font-family: var(--font-mono); font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em; font-size: 11px;
  padding: 16px 22px;
}
.kat-btn--ghost:hover { background: rgba(220,255,30,0.06); }
.kat-btn--volt {
  background: var(--accent); color: var(--bg);
  font-family: var(--font-mono); font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em; font-size: 11px;
}
.kat-btn--volt:hover { background: var(--fg1); }

.kat-arrow {
  display: inline-block; width: 14px; height: 14px;
  border-top: 2px solid currentColor; border-right: 2px solid currentColor;
  transform: rotate(45deg); margin-bottom: 2px;
}

/* ──────── PAGE WRAPPER ──────── */
.kat-shell { padding-top: 84px; }

/* ──────── HERO ──────── */
.kat-hero {
  max-width: var(--max-w); margin: 0 auto;
  padding: 64px var(--gutter) 0;
  position: relative;
  border-bottom: 2px solid var(--accent);
}
.kat-hero__crumbs {
  display: flex; justify-content: space-between; align-items: flex-end;
  margin-bottom: 56px; font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg2);
}
.kat-hero__crumbs span.kat-volt { color: var(--accent); }
.kat-hero__crumbs .kat-coords { color: var(--fg4); }

.kat-hero__layout {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 64px;
  align-items: end; padding-bottom: 56px;
}
.kat-hero__title {
  font-size: clamp(72px, 11vw, 156px); font-weight: 700;
  letter-spacing: -0.05em; line-height: 0.88; color: var(--fg1);
  font-family: var(--font-display);
}
.kat-hero__title--outline {
  color: transparent; -webkit-text-stroke: 2px var(--accent);
}
.kat-hero__period { color: var(--accent); }

.kat-hero__right {
  display: flex; flex-direction: column; gap: 20px;
  padding-bottom: 8px;
}
.kat-hero__lede {
  font-size: 18px; line-height: 1.55; color: var(--fg1);
  font-weight: 500; letter-spacing: -0.01em;
}
.kat-hero__lede span { color: var(--fg2); }
.kat-hero__sig {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--fg2); letter-spacing: 0.1em; text-transform: uppercase;
  padding-top: 16px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between;
}
.kat-hero__sig span.kat-volt { color: var(--accent); }

.kat-hero__band {
  display: grid; grid-template-columns: auto 1fr auto; gap: 40px;
  align-items: center;
  border-top: 2px solid var(--border);
  padding: 28px 0;
}
.kat-hero__ctas { display: flex; gap: 12px; }
.kat-hero__counter {
  text-align: right;
  font-family: var(--font-mono);
}
.kat-hero__counter b {
  display: block; font-family: var(--font-display); font-weight: 700;
  font-size: 36px; color: var(--accent); letter-spacing: -0.03em; line-height: 1;
}
.kat-hero__counter span {
  font-size: 10px; color: var(--fg2); letter-spacing: 0.12em;
  text-transform: uppercase;
}
.kat-hero__sysbadge {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--fg2); letter-spacing: 0.1em; text-transform: uppercase;
  padding: 8px 12px; border: 1px solid var(--border);
  display: inline-flex; align-items: center; gap: 8px;
}
.kat-hero__sysbadge::before {
  content: ''; width: 6px; height: 6px; background: var(--accent);
  animation: blink 1.8s infinite;
}

/* ──────── BLUEPRINT ──────── */
.kat-blueprint {
  position: relative; max-width: var(--max-w); margin: 0 auto;
  padding: 32px var(--gutter); border-bottom: 2px solid var(--border);
  background: rgba(8,8,8,0.4);
}
.kat-blueprint__head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 24px;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg2);
}
.kat-blueprint__head b { color: var(--accent); }
.kat-blueprint__svg {
  width: 100%; height: 220px; display: block;
  border: 1px solid var(--border);
  background:
    repeating-linear-gradient(0deg, transparent 0, transparent 21px, rgba(31,31,31,0.5) 21px, rgba(31,31,31,0.5) 22px),
    repeating-linear-gradient(90deg, transparent 0, transparent 21px, rgba(31,31,31,0.5) 21px, rgba(31,31,31,0.5) 22px);
}

/* ──────── LOGO MARQUEE ──────── */
.kat-trust {
  border-bottom: 2px solid var(--border);
  padding: 28px 0; overflow: hidden;
  max-width: var(--max-w); margin: 0 auto;
  position: relative;
}
.kat-trust__inner {
  padding: 0 var(--gutter);
  display: grid; grid-template-columns: 200px 1fr; gap: 40px; align-items: center;
}
.kat-trust__label {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--fg2); letter-spacing: 0.12em; text-transform: uppercase;
  line-height: 1.5;
}
.kat-trust__label::before { content: '// '; color: var(--accent); }
.kat-trust__track {
  display: flex; gap: 64px; align-items: center;
  animation: marquee 28s linear infinite;
}
.kat-trust__logo {
  font-family: var(--font-display); font-size: 22px; font-weight: 600;
  color: var(--fg2); letter-spacing: -0.02em; white-space: nowrap;
  display: flex; align-items: center; gap: 12px;
  transition: color .2s;
  flex-shrink: 0;
}
.kat-trust__logo:hover { color: var(--accent); }
.kat-trust__logo i {
  display: inline-block; width: 8px; height: 8px;
  background: var(--accent); transform: rotate(45deg);
}
.kat-trust__logo--ghost { color: var(--fg4); font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; }
.kat-trust__logo-img { height: 56px; width: auto; display: block; filter: brightness(0) invert(1) opacity(0.75); transition: filter .2s; }
.kat-trust__logo:hover .kat-trust__logo-img { filter: none; }
@keyframes marquee { from { transform: translateX(0);} to { transform: translateX(-50%);} }
.kat-trust__mask {
  position: relative; overflow: hidden;
}

/* ──────── SECTION ──────── */
.kat-section {
  max-width: var(--max-w); margin: 0 auto;
  padding: 96px var(--gutter);
  border-bottom: 2px solid var(--border);
  position: relative;
}
.kat-section__head {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
  align-items: end; margin-bottom: 56px;
}
.kat-section__head--single { grid-template-columns: 1fr; }
.kat-section__title {
  font-size: clamp(48px, 6vw, 72px);
  font-weight: 700; letter-spacing: -0.04em; line-height: 0.92;
  color: var(--fg1);
}
.kat-section__title--outline {
  color: transparent; -webkit-text-stroke: 2px var(--accent);
}
.kat-section__intro {
  font-size: 17px; line-height: 1.6; color: var(--fg2);
  max-width: 460px; padding-bottom: 8px;
}
.kat-section__intro strong { color: var(--fg1); font-weight: 600; }
.kat-section__intro span.kat-volt { color: var(--accent); }

.kat-eyebrow {
  font-family: var(--font-mono); font-size: 11px; color: var(--accent);
  letter-spacing: 0.14em; text-transform: uppercase;
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 16px;
}
.kat-eyebrow::before { content: '//'; }
.kat-eyebrow::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

/* ──────── PAIN POINTS ──────── */
.kat-pain { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; }
.kat-pain__cell {
  background: var(--surface); border: 2px solid var(--border);
  padding: 32px; transition: border-color .2s, background .2s;
  display: flex; flex-direction: column; gap: 18px;
  min-height: 280px;
}
.kat-pain__cell:hover { border-color: var(--accent); background: #0d0d0d; }
.kat-pain__n {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--accent); letter-spacing: 0.14em;
}
.kat-pain__t {
  font-size: 22px; font-weight: 600; line-height: 1.2;
  letter-spacing: -0.02em; color: var(--fg1);
}
.kat-pain__d { font-size: 14px; color: var(--fg2); line-height: 1.55; }
.kat-pain__cost {
  margin-top: auto; padding-top: 16px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg2);
}
.kat-pain__cost b { color: var(--accent); font-size: 11px; }

/* ──────── USE CASES ──────── */
.kat-uses {
  display: grid; grid-template-columns: 280px 1fr; gap: 2px;
  border: 2px solid var(--border); background: var(--border);
}
.kat-uses__list { background: var(--bg); display: flex; flex-direction: column; }
.kat-uses__tab {
  text-align: left; padding: 22px 24px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-display); font-size: 16px; font-weight: 500;
  color: var(--fg2); letter-spacing: -0.01em;
  display: grid; grid-template-columns: 28px 1fr auto; gap: 12px;
  align-items: center;
  transition: background .15s, color .15s;
}
.kat-uses__tab:last-child { border-bottom: none; }
.kat-uses__tab span.kat-tab__n {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.1em; color: var(--fg4);
}
.kat-uses__tab span.kat-tab__chev {
  font-family: var(--font-mono); font-size: 14px; color: var(--fg4);
  opacity: 0; transition: opacity .15s, transform .15s;
}
.kat-uses__tab:hover { color: var(--fg1); background: rgba(220,255,30,0.03); }
.kat-uses__tab.is-active {
  background: var(--accent); color: var(--bg);
}
.kat-uses__tab.is-active .kat-tab__n,
.kat-uses__tab.is-active .kat-tab__chev { color: var(--bg); opacity: 1; }
.kat-uses__tab.is-active .kat-tab__chev { transform: translateX(2px); }

.kat-uses__panel {
  background: var(--surface); padding: 40px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
}
.kat-uses__panel h3 {
  font-size: 32px; font-weight: 700; letter-spacing: -0.03em;
  line-height: 1.05; color: var(--fg1); margin-bottom: 16px;
}
.kat-uses__panel p {
  color: var(--fg2); font-size: 15px; line-height: 1.65;
}
.kat-uses__bullets {
  list-style: none; display: flex; flex-direction: column; gap: 0;
  margin-top: 24px;
}
.kat-uses__bullets li {
  padding: 12px 0; border-bottom: 1px solid var(--border);
  font-family: var(--font-mono); font-size: 12px;
  color: var(--fg1); letter-spacing: 0.04em;
  display: grid; grid-template-columns: 18px 1fr; gap: 8px;
}
.kat-uses__bullets li:last-child { border-bottom: none; }
.kat-uses__bullets li::before { content: '+'; color: var(--accent); font-weight: 700; }
.kat-uses__diagram {
  border: 1px solid var(--border); padding: 24px;
  background: var(--bg);
  display: flex; flex-direction: column; gap: 12px;
}
.kat-uses__diagram-label {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--accent); letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 8px;
}
.kat-uses__flow {
  display: grid; gap: 8px;
}
.kat-uses__node {
  padding: 12px 14px; border: 1px solid var(--border);
  font-family: var(--font-mono); font-size: 11px; color: var(--fg1);
  letter-spacing: 0.04em; background: var(--surface);
  display: flex; align-items: center; gap: 10px;
  position: relative;
}
.kat-uses__node--accent { border-color: var(--accent); color: var(--accent); }
.kat-uses__node b {
  font-family: var(--font-mono); font-size: 10px; color: var(--fg4);
  letter-spacing: 0.1em; min-width: 28px;
}
.kat-uses__arrow {
  text-align: center; font-family: var(--font-mono); color: var(--fg4);
  font-size: 14px;
}

/* ──────── PROCESS ──────── */
.kat-process { display: grid; grid-template-columns: 1fr; gap: 2px; }
.kat-process__row {
  display: grid; grid-template-columns: 80px 1fr 200px 180px;
  gap: 0; background: var(--surface); border: 2px solid var(--border);
  align-items: stretch;
  transition: border-color .2s;
}
.kat-process__row:hover { border-color: var(--accent); }
.kat-process__row > * {
  padding: 28px 24px;
  border-right: 1px solid var(--border);
}
.kat-process__row > *:last-child { border-right: none; }
.kat-process__n {
  font-family: var(--font-mono); font-size: 28px; font-weight: 700;
  color: transparent; -webkit-text-stroke: 1.5px var(--accent);
  letter-spacing: 0.02em; display: flex; align-items: center;
}
.kat-process__title {
  font-size: 22px; font-weight: 600; letter-spacing: -0.02em;
  color: var(--fg1); display: flex; align-items: center;
}
.kat-process__desc {
  font-size: 13px; color: var(--fg2); line-height: 1.55;
  display: flex; align-items: center;
}
.kat-process__meta {
  display: flex; flex-direction: column; gap: 4px;
  justify-content: center; align-items: flex-end; text-align: right;
}
.kat-process__meta b {
  font-family: var(--font-mono); font-size: 14px; color: var(--accent);
  letter-spacing: 0.02em;
}
.kat-process__meta span {
  font-family: var(--font-mono); font-size: 10px; color: var(--fg4);
  letter-spacing: 0.1em; text-transform: uppercase;
}

/* ──────── ABOUT ──────── */
.kat-about {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 2px;
  background: var(--border);
}
.kat-about__copy, .kat-about__photo {
  background: var(--surface); border: 2px solid var(--border);
  padding: 40px;
}
.kat-about__copy h3 {
  font-size: 32px; font-weight: 700; letter-spacing: -0.03em; line-height: 1.1;
  margin-bottom: 24px; color: var(--fg1);
}
.kat-about__copy h3 b { color: var(--accent); }
.kat-about__copy p {
  color: var(--fg2); font-size: 15px; line-height: 1.7;
  margin-bottom: 16px;
}
.kat-about__copy p:last-of-type { margin-bottom: 32px; }
.kat-about__facts { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 2px; background: var(--border); }
.kat-about__fact {
  background: var(--surface); padding: 20px 16px;
  display: flex; flex-direction: column; gap: 6px;
}
.kat-about__fact b {
  font-family: var(--font-display); font-size: 28px; font-weight: 700;
  color: var(--accent); letter-spacing: -0.02em; line-height: 1;
}
.kat-about__fact span {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--fg2); letter-spacing: 0.1em; text-transform: uppercase;
  line-height: 1.5;
}
.kat-about__photo {
  display: flex; flex-direction: column; gap: 16px;
  padding: 0; overflow: hidden;
  position: relative;
}
.kat-about__portrait {
  flex: 1; display: flex; align-items: center; justify-content: center;
  background:
    repeating-linear-gradient(0deg, transparent 0, transparent 11px, rgba(31,31,31,0.6) 11px, rgba(31,31,31,0.6) 12px),
    repeating-linear-gradient(90deg, transparent 0, transparent 11px, rgba(31,31,31,0.6) 11px, rgba(31,31,31,0.6) 12px),
    var(--bg);
  min-height: 360px;
  position: relative;
}
.kat-about__portrait-text {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--fg4); letter-spacing: 0.12em; text-transform: uppercase;
  text-align: center; line-height: 1.8;
}
.kat-about__portrait-text b { color: var(--accent); display: block; font-size: 11px; margin-bottom: 8px; }
.kat-about__photo-caption {
  padding: 16px 24px; border-top: 2px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em;
  color: var(--fg2); text-transform: uppercase;
}
.kat-about__photo-caption b { color: var(--fg1); }
.kat-about__portrait-mark {
  position: absolute; top: 16px; left: 16px;
  font-family: var(--font-mono); font-size: 10px; color: var(--accent);
  letter-spacing: 0.14em;
}
.kat-about__portrait-mark2 {
  position: absolute; bottom: 16px; right: 16px;
  font-family: var(--font-mono); font-size: 10px; color: var(--fg4);
  letter-spacing: 0.14em;
}

/* ──────── PRICING ──────── */
.kat-price {
  background: var(--surface); border: 2px solid var(--border);
}
.kat-price__head {
  padding: 32px 32px 24px;
  border-bottom: 2px solid var(--border);
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  align-items: end;
}
.kat-price__headline {
  font-size: 40px; font-weight: 700; letter-spacing: -0.03em;
  line-height: 1; color: var(--fg1);
}
.kat-price__sub {
  font-size: 14px; color: var(--fg2); line-height: 1.55;
}
.kat-price__rows {
  display: grid; grid-template-columns: 1fr 1fr; gap: 2px;
  background: var(--border);
}
.kat-price__row {
  background: var(--surface); padding: 32px;
  display: flex; flex-direction: column; gap: 12px;
}
.kat-price__row-label {
  font-family: var(--font-mono); font-size: 11px; color: var(--accent);
  letter-spacing: 0.14em; text-transform: uppercase;
}
.kat-price__row-label::before { content: '// '; }
.kat-price__amount {
  font-family: var(--font-display); font-size: 48px; font-weight: 700;
  color: var(--fg1); letter-spacing: -0.04em; line-height: 1;
}
.kat-price__amount b {
  font-family: var(--font-mono); font-size: 14px; color: var(--accent);
  font-weight: 700; letter-spacing: 0.05em;
  display: inline-block; margin-left: 8px; vertical-align: super;
}
.kat-price__amount-unit {
  font-family: var(--font-mono); font-size: 12px; color: var(--fg2);
  letter-spacing: 0.08em; margin-top: 4px;
}
.kat-price__row-desc {
  color: var(--fg2); font-size: 13px; line-height: 1.6;
  padding-top: 16px; border-top: 1px solid var(--border);
  margin-top: auto;
}
.kat-price__foot {
  padding: 28px 32px;
  border-top: 2px solid var(--border);
  display: grid; grid-template-columns: 1fr auto; gap: 24px;
  align-items: center;
}
.kat-price__foot-text {
  font-family: var(--font-mono); font-size: 11px; color: var(--fg2);
  letter-spacing: 0.06em; line-height: 1.7;
}
.kat-price__foot-text b { color: var(--fg1); }

/* ──────── FAQ ──────── */
.kat-faq { display: grid; grid-template-columns: 1fr; gap: 2px; }
.kat-faq__item {
  background: var(--surface); border: 2px solid var(--border);
  transition: border-color .2s;
}
.kat-faq__item.is-open { border-color: var(--accent); }
.kat-faq__q {
  width: 100%; text-align: left;
  padding: 24px 32px;
  display: grid; grid-template-columns: 60px 1fr 32px; gap: 24px;
  align-items: center;
  font-family: var(--font-display); font-size: 18px; font-weight: 500;
  color: var(--fg1); letter-spacing: -0.01em;
}
.kat-faq__q-n {
  font-family: var(--font-mono); font-size: 11px; color: var(--accent);
  letter-spacing: 0.1em;
}
.kat-faq__q-plus {
  font-family: var(--font-mono); font-size: 22px; color: var(--accent);
  text-align: right; transition: transform .25s;
}
.kat-faq__item.is-open .kat-faq__q-plus { transform: rotate(45deg); }
.kat-faq__a {
  overflow: hidden; max-height: 0;
  transition: max-height .35s ease;
}
.kat-faq__a-inner {
  padding: 0 32px 28px 116px;
  font-size: 15px; line-height: 1.7; color: var(--fg2);
}
.kat-faq__item.is-open .kat-faq__a { max-height: 400px; }

/* ──────── CONTACT ──────── */
.kat-contact { display: grid; grid-template-columns: 1fr 1.2fr; gap: 2px; }
.kat-contact__col {
  background: var(--surface); border: 2px solid var(--border);
  padding: 40px;
  display: flex; flex-direction: column;
}
.kat-contact__big {
  font-size: 40px; font-weight: 700; letter-spacing: -0.03em;
  line-height: 1.05; color: var(--fg1); margin-bottom: 16px;
}
.kat-contact__big b { color: var(--accent); }
.kat-contact__lede {
  font-size: 14px; color: var(--fg2); line-height: 1.65; margin-bottom: 40px;
}
.kat-contact__lines { display: flex; flex-direction: column; gap: 20px; }
.kat-contact__line {
  display: grid; grid-template-columns: 110px 1fr; gap: 16px;
  padding: 14px 0; border-bottom: 1px solid var(--border);
  align-items: center;
}
.kat-contact__line:last-child { border-bottom: none; }
.kat-contact__line-label {
  font-family: var(--font-mono); font-size: 10px; color: var(--fg4);
  letter-spacing: 0.12em; text-transform: uppercase;
}
.kat-contact__line-value {
  font-family: var(--font-mono); font-size: 13px; color: var(--fg1);
  letter-spacing: 0.02em;
}
.kat-contact__line-value:hover { color: var(--accent); }

.kat-field { display: flex; flex-direction: column; gap: 8px; }
.kat-field__label {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.12em; color: var(--accent); text-transform: uppercase;
}
.kat-field__input {
  background: var(--bg); border: 2px solid var(--border);
  padding: 14px 16px; font-family: var(--font-display);
  font-size: 14px; color: var(--fg1); outline: none;
  caret-color: var(--accent); transition: border-color .15s;
  width: 100%; resize: vertical;
}
.kat-field__input:focus { border-color: var(--accent); }
.kat-field__input--error { border-color: var(--kat-error); }
.kat-field__error {
  font-family: var(--font-mono); font-size: 10px; color: var(--kat-error);
  letter-spacing: 0.04em;
}
.kat-contact__form { display: flex; flex-direction: column; gap: 20px; flex: 1; }
.kat-contact__form-foot {
  margin-top: auto; padding-top: 16px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px;
}
.kat-contact__legal {
  font-family: var(--font-mono); font-size: 10px; color: var(--fg4);
  letter-spacing: 0.06em; max-width: 240px; line-height: 1.6;
}
.kat-contact__sent {
  display: flex; flex-direction: column; gap: 14px; justify-content: center;
  flex: 1;
}
.kat-contact__sent h3 {
  font-size: 32px; font-weight: 700; letter-spacing: -0.03em; color: var(--fg1);
}
.kat-contact__sent p { color: var(--fg2); font-size: 15px; }
.kat-contact__sent b { color: var(--accent); }

/* CHIPS */
.kat-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.kat-chip {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 10px; border: 1px solid var(--border);
  color: var(--fg2);
}
.kat-chip--volt { color: var(--accent); border-color: var(--accent); }

/* ──────── FOOTER ──────── */
.kat-footer {
  border-top: 2px solid var(--accent);
  max-width: var(--max-w); margin: 0 auto;
  padding: 56px var(--gutter) 28px;
}
.kat-footer__top {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}
.kat-footer__brand {
  display: flex; flex-direction: column; gap: 14px;
}
.kat-footer__big {
  font-size: 64px; font-weight: 700; line-height: 0.9;
  letter-spacing: -0.04em;
  color: transparent; -webkit-text-stroke: 2px var(--accent);
}
.kat-footer__brand p {
  font-family: var(--font-mono); font-size: 11px; color: var(--fg2);
  letter-spacing: 0.06em; line-height: 1.7; max-width: 280px;
}
.kat-footer__col h4 {
  font-family: var(--font-mono); font-size: 10px; color: var(--accent);
  letter-spacing: 0.14em; text-transform: uppercase;
  margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
.kat-footer__col h4::before { content: '// '; }
.kat-footer__col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.kat-footer__col a {
  font-family: var(--font-mono); font-size: 12px; color: var(--fg2);
  letter-spacing: 0.04em; transition: color .15s;
}
.kat-footer__col a:hover { color: var(--accent); }
.kat-footer__bot {
  padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono); font-size: 10px; color: var(--fg4);
  letter-spacing: 0.1em; text-transform: uppercase;
}

/* ──────── STICKY CTA BAR ──────── */
.kat-stickycta {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 90;
  background: var(--bg); border-top: 2px solid var(--accent);
  padding: 14px var(--gutter);
  display: grid; grid-template-columns: auto 1fr auto; gap: 32px;
  align-items: center;
  transform: translateY(100%); transition: transform .35s ease;
}
.kat-stickycta.is-visible { transform: translateY(0); }
.kat-stickycta__k {
  font-family: var(--font-display); font-size: 22px; font-weight: 700;
  color: transparent; -webkit-text-stroke: 1.5px var(--accent);
}
.kat-stickycta__text {
  font-family: var(--font-mono); font-size: 12px; color: var(--fg1);
  letter-spacing: 0.04em;
}
.kat-stickycta__text b { color: var(--accent); }

/* ──────── 3D SCENE ──────── */
.kat-scene-section { background: #0d0d0d; }
.kat-scene {
  border: 2px solid var(--border);
  background: #0d0d0d;
  display: flex; flex-direction: column;
}
.kat-scene__stage {
  position: relative; height: 520px;
  border-bottom: 2px solid var(--border);
  overflow: hidden;
}
.kat-scene__canvas {
  position: absolute; inset: 0;
}
.kat-scene__status {
  position: absolute; top: 20px; right: 20px;
  font-family: 'Courier New', var(--font-mono);
  font-size: 11px; color: #c8f000; letter-spacing: 0.06em;
  z-index: 2;
}
.kat-scene__status span {
  animation: blink 1.4s ease-in-out infinite;
  margin-right: 4px;
}
.kat-scene__hint {
  position: absolute; bottom: 16px; left: 20px;
  font-family: var(--font-mono); font-size: 10px;
  color: #444; letter-spacing: 0.08em;
  text-transform: uppercase;
}
.kat-scene__tabs {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid #2a2a2a;
}
.kat-scene__tab {
  font-family: 'Courier New', var(--font-mono);
  font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #555; background: transparent;
  padding: 14px 20px;
  border-right: 1px solid #2a2a2a;
  text-align: center;
}
.kat-scene__tab:last-child { border-right: none; }
.kat-scene__tab:hover { color: #c8f000; }
.kat-scene__tab.is-active {
  background: #c8f000; color: #0d0d0d; font-weight: 700;
}

@media (max-width: 900px) {
  .kat-scene__stage { height: 360px; }
  .kat-scene__tabs { grid-template-columns: 1fr 1fr; }
  .kat-scene__tab { border-bottom: 1px solid #2a2a2a; }
}

/* ──────── ANIMATIONS ──────── */
html.anim-ready .anim-fade { opacity: 0; will-change: opacity, transform; }
html.anim-ready .anim-rise { opacity: 0; transform: translateY(28px); will-change: opacity, transform; }
html.no-anim .anim-fade, html.no-anim .anim-rise { opacity: 1 !important; transform: none !important; }
.no-anim .kat-split-word { transform: none !important; opacity: 1 !important; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .kat-pulse__track, .kat-trust__track { animation: none !important; }
}

/* ──────── HAMBURGER & MOBILE MENU ──────── */
.kat-nav__burger {
  display: none;
  padding: 8px;
  margin-left: 8px;
  cursor: pointer;
}
.kat-burger {
  display: flex; flex-direction: column; justify-content: space-between;
  width: 22px; height: 16px;
}
.kat-burger span {
  display: block; height: 2px; background: var(--fg1);
  transition: transform .25s, opacity .25s;
  transform-origin: center;
}
.kat-burger--open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.kat-burger--open span:nth-child(2) { opacity: 0; }
.kat-burger--open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.kat-mobile-menu {
  display: none;
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 99;
  background: var(--bg);
  border-top: 2px solid var(--accent);
  flex-direction: column;
  padding: 32px 24px 40px;
  overflow-y: auto;
}
.kat-mobile-menu__links {
  list-style: none;
  margin-bottom: 32px;
}
.kat-mobile-menu__links li {
  border-bottom: 1px solid var(--border);
}
.kat-mobile-menu__links a {
  display: block;
  padding: 18px 0;
  font-family: var(--font-display); font-size: 28px; font-weight: 700;
  color: var(--fg1);
  transition: color .15s;
}
.kat-mobile-menu__links a:hover { color: var(--accent); }
.kat-mobile-menu__cta {
  width: 100%; justify-content: center; text-align: center;
}

/* ──────── RESPONSIVE ──────── */
@media (max-width: 900px) {
  .kat-nav__links { display: none; }
  .kat-nav__cta--desktop { display: none; }
  .kat-nav__burger { display: flex; }
  .kat-mobile-menu { display: flex; }

  /* Hero */
  .kat-hero__layout { grid-template-columns: 1fr; gap: 24px; }
  .kat-hero__band { grid-template-columns: 1fr; gap: 20px; }
  .kat-hero__counter { text-align: left; }
  .kat-hero__title { font-size: clamp(48px, 14vw, 72px); }
  .kat-hero__crumbs { flex-wrap: wrap; gap: 8px; }

  /* Sections */
  .kat-section { padding: 64px 20px; }
  .kat-section__head { grid-template-columns: 1fr; gap: 16px; }
  .kat-section__title { font-size: clamp(36px, 10vw, 56px); }

  /* Grids → single column */
  .kat-pain, .kat-uses, .kat-about, .kat-price__rows, .kat-contact { grid-template-columns: 1fr; }

  /* Process */
  .kat-process__row { grid-template-columns: 60px 1fr; }
  .kat-process__row > *:nth-child(n+3) { display: none; }

  /* Uses */
  .kat-uses__panel { grid-template-columns: 1fr; padding: 24px; }
  .kat-uses__tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; flex-wrap: nowrap; }

  /* Blueprint */
  .kat-blueprint { padding: 24px 20px; }
  .kat-blueprint__grid { grid-template-columns: 1fr; }

  /* Pricing */
  .kat-price__row-head { flex-wrap: wrap; gap: 12px; }

  /* Contact */
  .kat-contact__big { font-size: clamp(32px, 9vw, 48px); }
  .kat-contact__form { gap: 16px; }
  .kat-contact__col { padding: 24px; align-items: center; text-align: center; }
  .kat-contact__lines { width: 100%; }
  .kat-contact__line { grid-template-columns: 90px 1fr; }
  .kat-contact__form-foot { flex-direction: column; align-items: stretch; gap: 12px; }
  .kat-contact__form-foot .kat-btn { width: 100%; justify-content: center; }

  /* Footer */
  .kat-footer__top { grid-template-columns: 1fr 1fr; }
  .kat-footer__brand { grid-column: 1 / -1; }

  /* Pulse — schneller auf Mobile */
  .kat-pulse__track { animation-duration: 18s; }

  /* Nav logo nicht abschneiden */
  .kat-nav { padding: 0 16px; overflow: visible; }
  .kat-nav__logo { padding-left: 4px; overflow: visible; }
  .kat-nav__k { overflow: visible; display: inline-block; padding: 2px; }

  /* Trust section — keine fixe 200px Spalte */
  .kat-trust__inner { grid-template-columns: 1fr; gap: 16px; }
  .kat-trust__label { display: none; }

  /* Pricing head & foot → 1 Spalte */
  .kat-price__head { grid-template-columns: 1fr; }
  .kat-price__foot { grid-template-columns: 1fr; }
  .kat-price__headline { font-size: 28px; }
  .kat-price__amount { font-size: 36px; }

  /* Blueprint head → 1 Spalte */
  .kat-blueprint__head { flex-direction: column; gap: 12px; }

  /* Misc */
  .kat-stickycta { display: none; }
  .kat-gutter { --gutter: 20px; }

  /* Buttons */
  .kat-btn { padding: 14px 20px; font-size: 13px; }
  .kat-hero__ctas { flex-direction: column; }
  .kat-hero__ctas .kat-btn { width: 100%; justify-content: center; text-align: center; }
}

@media (max-width: 480px) {
  .kat-hero__title { font-size: clamp(42px, 13vw, 60px); }
  .kat-footer__top { grid-template-columns: 1fr; }
  .kat-contact__lines { gap: 12px; }
  .kat-faq__q { font-size: 14px; }
  .kat-section { padding: 48px 16px; }
  .kat-blueprint { padding: 20px 16px; }
}