/* ============ RESET ============ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  background: var(--kx-bg);
  color: var(--kx-text);
  font-family: var(--kx-font-body);
  font-size: 1rem;
  line-height: 1.7;
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}

button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
}

table {
  border-collapse: collapse;
  width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: inherit;
  line-height: 1.2;
}

::selection {
  background: var(--kx-accent);
  color: var(--kx-bg);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--kx-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--kx-surface-2);
  border: 2px solid var(--kx-bg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--kx-accent);
}

/* ============ TOKENS ============ */
:root {
  color-scheme: dark;

  --kx-bg: #0A0A0A;
  --kx-surface: #1A1A1A;
  --kx-surface-2: #232323;
  --kx-surface-3: #121212;
  --kx-text: #FFFFFF;
  --kx-text-dim: #B0B0B0;
  --kx-text-faint: #707070;
  --kx-accent: #39FF14;
  --kx-accent-2: #00FFFF;
  --kx-purple: #6A0DAD;
  --kx-warning: #FF6B35;

  --kx-font-display: Impact, 'Arial Black', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --kx-font-body: Inter, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;

  --kx-header-h: 72px;
  --kx-container: 1280px;
  --kx-container-wide: 1440px;
  --kx-gutter: 1.5rem;

  --kx-space-1: 0.25rem;
  --kx-space-2: 0.5rem;
  --kx-space-3: 1rem;
  --kx-space-4: 1.5rem;
  --kx-space-5: 2.5rem;
  --kx-space-6: 4rem;
  --kx-space-7: 6rem;

  --kx-border: 3px solid var(--kx-text);
  --kx-border-thin: 1px solid rgba(255, 255, 255, 0.14);
  --kx-border-accent: 3px solid var(--kx-accent);
  --kx-shadow-hard: 8px 8px 0 rgba(0, 0, 0, 0.7);
  --kx-shadow-accent: 0 0 28px rgba(57, 255, 20, 0.22);
  --kx-shadow-cyan: 0 0 28px rgba(0, 255, 255, 0.18);

  --kx-ease-1: 200ms ease;
  --kx-ease-2: 300ms ease;
  --kx-ease-3: 500ms ease;
}

/* ============ UTILITIES ============ */
.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;
}

.kx-container {
  width: 100%;
  max-width: var(--kx-container);
  margin: 0 auto;
  padding-inline: var(--kx-gutter);
}

.kx-container--wide {
  max-width: var(--kx-container-wide);
}

.kx-container--narrow {
  max-width: 780px;
}

.kx-section {
  padding-block: var(--kx-space-6);
}

.kx-section--tight {
  padding-block: var(--kx-space-5);
}

/* ============ TYPOGRAPHY ============ */
.kx-title {
  font-family: var(--kx-font-display);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--kx-text);
}

.kx-title--display {
  font-size: clamp(3rem, 7vw, 5.75rem);
  line-height: 0.92;
}

.kx-title--h1 {
  font-size: clamp(2.25rem, 4.5vw, 3.75rem);
}

.kx-title--h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

.kx-title--h3 {
  font-size: clamp(1.375rem, 2vw, 1.75rem);
  line-height: 1.1;
}

.kx-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--kx-accent);
  margin-bottom: 0.75rem;
}

.kx-kicker::before {
  content: '';
  display: inline-block;
  width: 2rem;
  height: 2px;
  background: var(--kx-accent);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.6);
}

.kx-lede {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--kx-text-dim);
  max-width: 62ch;
}

.kx-prose {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--kx-text-dim);
}

.kx-prose p + p {
  margin-top: 1rem;
}

.kx-prose strong {
  color: var(--kx-text);
}

.kx-prose a {
  color: var(--kx-accent-2);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--kx-ease-1);
}

.kx-prose a:hover {
  color: var(--kx-accent);
}

.kx-prose h2,
.kx-prose h3 {
  margin-top: 2rem;
  color: var(--kx-text);
}

/* ============ BUTTONS ============ */
.kx-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 44px;
  padding: 0.7rem 1.4rem;
  background: var(--kx-surface);
  color: var(--kx-text);
  border: 2px solid var(--kx-text);
  font-family: var(--kx-font-body);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  line-height: 1;
  transition: background var(--kx-ease-1), color var(--kx-ease-1), border-color var(--kx-ease-1), box-shadow var(--kx-ease-1);
}

.kx-btn:hover,
.kx-btn:focus-visible {
  background: var(--kx-accent);
  color: var(--kx-bg);
  border-color: var(--kx-accent);
  box-shadow: var(--kx-shadow-accent);
}

.kx-btn--accent {
  background: var(--kx-accent);
  color: var(--kx-bg);
  border-color: var(--kx-accent);
}

.kx-btn--accent:hover,
.kx-btn--accent:focus-visible {
  background: transparent;
  color: var(--kx-accent);
  box-shadow: var(--kx-shadow-accent);
}

.kx-btn--ghost {
  background: transparent;
  color: var(--kx-text);
  border-color: rgba(255, 255, 255, 0.4);
}

.kx-btn--ghost:hover,
.kx-btn--ghost:focus-visible {
  background: var(--kx-surface);
  border-color: var(--kx-accent-2);
  color: var(--kx-accent-2);
  box-shadow: var(--kx-shadow-cyan);
}

/* ============ SITE HEADER ============ */
.kx-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--kx-header-h);
  background: transparent;
  border-bottom: none;
  transition: background var(--kx-ease-3), box-shadow var(--kx-ease-3), -webkit-backdrop-filter var(--kx-ease-3), backdrop-filter var(--kx-ease-3);
}

.kx-header.is-scrolled {
  background: rgba(10, 10, 10, 0.92);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.65);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.kx-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--kx-accent) 0%, var(--kx-accent-2) 35%, rgba(0, 0, 0, 0) 80%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--kx-ease-3);
}

.kx-header.is-scrolled::after {
  transform: scaleX(1);
}

.kx-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--kx-accent), var(--kx-accent-2));
  transform: scaleX(0);
  transform-origin: 0 50%;
  opacity: 0;
  pointer-events: none;
  will-change: transform;
}

.kx-header__inner {
  position: relative;
  height: 100%;
  max-width: var(--kx-container-wide);
  margin: 0 auto;
  padding-inline: var(--kx-gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.kx-brand {
  position: relative;
  z-index: 1001;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--kx-text);
}

.kx-brand__mark {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--kx-accent), var(--kx-accent-2));
  clip-path: polygon(0 0, 100% 0, 100% 62%, 62% 100%, 0 100%);
  box-shadow: 0 0 14px rgba(57, 255, 20, 0.45);
  flex-shrink: 0;
}

.kx-brand__text {
  font-family: var(--kx-font-display);
  font-size: 1.375rem;
  line-height: 1;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--kx-text);
}

.kx-brand__badge {
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--kx-accent);
  border: 1px solid var(--kx-accent);
  padding: 0.25em 0.6em;
  line-height: 1.2;
  white-space: nowrap;
}

/* ============ NAVIGATION ============ */
.kx-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.2vw, 2rem);
}

.kx-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.35rem 0.1rem;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
  transition: color var(--kx-ease-1);
}

.kx-nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--kx-accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--kx-ease-1);
}

.kx-nav__link:hover,
.kx-nav__link:focus-visible {
  color: var(--kx-accent);
}

.kx-nav__link:hover::after,
.kx-nav__link:focus-visible::after {
  transform: scaleX(1);
}

.kx-nav__link[aria-current="page"] {
  color: var(--kx-accent);
}

.kx-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.kx-nav-toggle {
  display: none;
  position: relative;
  z-index: 1001;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(10, 10, 10, 0.5);
  transition: border-color var(--kx-ease-1), background var(--kx-ease-1), box-shadow var(--kx-ease-1);
}

.kx-nav-toggle:hover,
.kx-nav-toggle:focus-visible {
  border-color: var(--kx-accent);
  background: rgba(10, 10, 10, 0.85);
  box-shadow: 0 0 14px rgba(57, 255, 20, 0.25);
}

.kx-nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--kx-text);
  margin-inline: auto;
  transition: transform var(--kx-ease-1), opacity var(--kx-ease-1);
}

.kx-nav-toggle[aria-expanded="true"] .kx-nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.kx-nav-toggle[aria-expanded="true"] .kx-nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.kx-nav-toggle[aria-expanded="true"] .kx-nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============ SITE FOOTER ============ */
.kx-footer {
  position: relative;
  background: var(--kx-bg);
  border-top: 3px solid var(--kx-text);
  margin-top: auto;
}

.kx-footer__accent {
  height: 4px;
  background: linear-gradient(90deg, var(--kx-accent), var(--kx-accent-2), var(--kx-purple));
}

.kx-footer__top {
  padding-block: var(--kx-space-6) var(--kx-space-5);
}

.kx-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 0.8fr 1.4fr;
  gap: 2.5rem;
}

.kx-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.25rem;
}

.kx-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.kx-footer__logo-mark {
  width: 30px;
  height: 30px;
  background: linear-gradient(135deg, var(--kx-accent), var(--kx-accent-2));
  clip-path: polygon(0 0, 100% 0, 100% 62%, 62% 100%, 0 100%);
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.35);
  flex-shrink: 0;
}

.kx-footer__logo-text {
  font-family: var(--kx-font-display);
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--kx-text);
}

.kx-footer__statement {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--kx-text-dim);
  max-width: 34ch;
}

.kx-footer__note {
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--kx-text-faint);
  max-width: 42ch;
  border-left: 2px solid var(--kx-accent);
  padding-left: 0.75rem;
}

.kx-footer__heading {
  font-family: var(--kx-font-display);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--kx-accent);
  margin-bottom: 1.25rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.kx-footer__list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.kx-footer__list a {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--kx-text-dim);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color var(--kx-ease-1), transform var(--kx-ease-1);
}

.kx-footer__list a::before {
  content: '';
  width: 6px;
  height: 6px;
  background: transparent;
  border: 1px solid var(--kx-accent);
  transform: rotate(45deg);
  transition: background var(--kx-ease-1), box-shadow var(--kx-ease-1);
  flex-shrink: 0;
}

.kx-footer__list a:hover,
.kx-footer__list a:focus-visible {
  color: var(--kx-accent);
  transform: translateX(4px);
}

.kx-footer__list a:hover::before,
.kx-footer__list a:focus-visible::before {
  background: var(--kx-accent);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.6);
}

.kx-footer__contact {
  display: grid;
  gap: 0;
}

.kx-footer__contact li {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  gap: 0.75rem;
  padding-block: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.kx-footer__contact .kx-footer__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--kx-text-faint);
  padding-top: 2px;
}

.kx-footer__contact .kx-footer__value {
  font-size: 0.8125rem;
  color: var(--kx-text-dim);
  line-height: 1.5;
  word-break: break-word;
}

.kx-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-block: 1.25rem;
}

.kx-footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--kx-text-faint);
  letter-spacing: 0.06em;
}

.kx-footer__icp {
  color: var(--kx-text-dim);
}

/* ============ PAGE TOP & HERO ============ */
.kx-page-top {
  position: relative;
  padding-top: calc(var(--kx-header-h) + 2.5rem);
  padding-bottom: 2rem;
  border-bottom: 3px solid var(--kx-text);
  background: linear-gradient(180deg, rgba(106, 13, 173, 0.18) 0%, transparent 60%);
}

.kx-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--kx-header-h) + 2rem);
  padding-bottom: 3rem;
  overflow: hidden;
}

.kx-hero--page {
  min-height: auto;
  padding-block: calc(var(--kx-header-h) + 3rem) 3rem;
  border-bottom: 3px solid var(--kx-text);
}

/* ============ FRAME ============ */
.kx-frame {
  position: relative;
  background: var(--kx-surface);
  border: var(--kx-border);
  box-shadow: var(--kx-shadow-hard);
  padding: 1.5rem;
}

.kx-frame::before {
  content: '';
  position: absolute;
  top: -3px;
  left: -3px;
  width: 56px;
  height: 56px;
  border-top: 4px solid var(--kx-accent);
  border-left: 4px solid var(--kx-accent);
  pointer-events: none;
}

.kx-frame::after {
  content: '';
  position: absolute;
  right: -3px;
  bottom: -3px;
  width: 56px;
  height: 56px;
  border-right: 4px solid var(--kx-accent-2);
  border-bottom: 4px solid var(--kx-accent-2);
  pointer-events: none;
}

/* ============ EDITORIAL GRID ============ */
.kx-editorial {
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 3rem);
}

.kx-editorial--reverse {
  grid-template-columns: minmax(0, 1fr) minmax(0, 220px);
}

.kx-side-note {
  position: relative;
  font-size: 0.75rem;
  line-height: 1.8;
  letter-spacing: 0.1em;
  color: var(--kx-text-dim);
  border-left: 2px solid var(--kx-accent);
  padding-left: 1rem;
}

.kx-side-note--vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  border-left: 0;
  border-right: 2px solid var(--kx-accent);
  padding-left: 0;
  padding-right: 1rem;
  max-height: 40vh;
  min-height: 6rem;
}

/* ============ CARDS ============ */
.kx-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.kx-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--kx-surface);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--kx-text);
  transition: border-color var(--kx-ease-1), box-shadow var(--kx-ease-1), transform var(--kx-ease-1);
}

.kx-card:hover,
.kx-card:focus-visible {
  border-color: var(--kx-accent);
  box-shadow: var(--kx-shadow-accent);
}

/* ============ DATA ROW ============ */
.kx-data-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.kx-data-cell {
  background: var(--kx-surface);
  padding: 1.25rem;
}

.kx-data-cell__label {
  display: block;
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--kx-text-faint);
  margin-bottom: 0.5rem;
}

.kx-data-cell__value {
  font-family: var(--kx-font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1;
  color: var(--kx-accent);
}

/* ============ INDEX ============ */
.kx-index {
  counter-reset: kx-index;
  display: flex;
  flex-direction: column;
}

.kx-index__item {
  counter-increment: kx-index;
  display: grid;
  grid-template-columns: 3rem 1fr auto;
  gap: 1rem;
  align-items: baseline;
  padding-block: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  text-decoration: none;
  color: var(--kx-text);
  transition: background var(--kx-ease-1), padding-left var(--kx-ease-1);
}

.kx-index__item::before {
  content: counter(kx-index, decimal-leading-zero);
  font-family: var(--kx-font-display);
  font-size: 1.5rem;
  color: var(--kx-accent);
  line-height: 1;
}

.kx-index__item:hover,
.kx-index__item:focus-visible {
  background: rgba(57, 255, 20, 0.05);
  padding-left: 0.5rem;
}

.kx-index__arrow {
  color: var(--kx-accent-2);
  font-size: 1.25rem;
  line-height: 1;
}

/* ============ TABLE ============ */
.kx-table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.kx-table {
  width: 100%;
  font-size: 0.875rem;
  border-collapse: separate;
  border-spacing: 0;
}

.kx-table th,
.kx-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.kx-table th {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--kx-text-dim);
  background: var(--kx-surface-2);
}

.kx-table tbody tr {
  background: var(--kx-surface);
  transition: background var(--kx-ease-1);
}

.kx-table tbody tr:hover {
  background: rgba(57, 255, 20, 0.07);
}

.kx-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ============ BREADCRUMBS ============ */
.kx-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--kx-text-faint);
}

.kx-crumbs li {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.kx-crumbs li + li::before {
  content: '/';
  color: var(--kx-accent);
}

.kx-crumbs a {
  color: var(--kx-text-dim);
  text-decoration: none;
  transition: color var(--kx-ease-1);
}

.kx-crumbs a:hover,
.kx-crumbs a:focus-visible {
  color: var(--kx-accent);
}

.kx-crumbs [aria-current="page"] {
  color: var(--kx-text);
}

/* ============ TAGS ============ */
.kx-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.kx-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--kx-text-dim);
  transition: border-color var(--kx-ease-1), color var(--kx-ease-1), background var(--kx-ease-1);
}

.kx-tag:hover,
.kx-tag:focus-visible {
  border-color: var(--kx-accent);
  color: var(--kx-accent);
  background: rgba(57, 255, 20, 0.08);
}

/* ============ CALLOUT & DIVIDER ============ */
.kx-callout {
  background: var(--kx-surface);
  border-left: 4px solid var(--kx-accent);
  padding: 1.5rem;
  box-shadow: var(--kx-shadow-hard);
}

.kx-callout--warn {
  border-left-color: var(--kx-warning);
}

.kx-divider {
  height: 3px;
  background: linear-gradient(90deg, var(--kx-accent), var(--kx-accent-2) 40%, transparent);
  border: 0;
  margin: 2rem 0;
}

blockquote {
  margin: 2rem 0;
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--kx-accent);
  background: var(--kx-surface);
  font-size: 1.125rem;
  color: var(--kx-text);
}

/* ============ IMAGE PLACEHOLDER ============ */
.kx-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(106, 13, 173, 0.55) 0%, transparent 55%),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.03) 0 2px, transparent 2px 6px),
    var(--kx-surface-2);
  border: 1px solid rgba(255, 255, 255, 0.14);
  isolation: isolate;
}

.kx-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: filter var(--kx-ease-3);
}

.kx-thumb[data-caption]::after {
  content: attr(data-caption);
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 1;
  padding: 0.3rem 0.85rem;
  background: var(--kx-bg);
  color: var(--kx-text-dim);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  border-top: 1px solid rgba(255, 255, 255, 0.28);
  border-right: 1px solid rgba(255, 255, 255, 0.28);
}

.kx-thumb--16x10 {
  aspect-ratio: 16 / 10;
}

.kx-thumb--4x3 {
  aspect-ratio: 4 / 3;
}

.kx-thumb--1x1 {
  aspect-ratio: 1 / 1;
}

/* ============ SKIP LINK ============ */
.kx-skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 2000;
  background: var(--kx-accent);
  color: var(--kx-bg);
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  text-decoration: none;
  transition: top var(--kx-ease-1);
}

.kx-skip-link:focus {
  top: 1rem;
}

/* ============ FOCUS ============ */
:focus-visible {
  outline: 3px solid var(--kx-accent-2);
  outline-offset: 3px;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1200px) {
  .kx-card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .kx-data-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 960px) {
  .kx-nav-toggle {
    display: flex;
  }

  .kx-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(82vw, 360px);
    height: 100vh;
    height: 100dvh;
    background: var(--kx-surface);
    border-left: 3px solid var(--kx-accent);
    box-shadow: -20px 0 40px rgba(0, 0, 0, 0.5);
    padding: calc(var(--kx-header-h) + 2rem) 1.75rem 2rem;
    transform: translateX(102%);
    visibility: hidden;
    overflow-y: auto;
    z-index: 999;
    transition: transform var(--kx-ease-2), visibility 0s linear var(--kx-ease-2);
  }

  .kx-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition: transform var(--kx-ease-2), visibility 0s linear 0s;
  }

  .kx-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .kx-nav__link {
    display: block;
    padding: 1rem 0;
    font-size: 1.0625rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .kx-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .kx-editorial,
  .kx-editorial--reverse {
    grid-template-columns: 1fr;
  }

  .kx-side-note--vertical {
    writing-mode: horizontal-tb;
    border-right: 0;
    border-left: 2px solid var(--kx-accent);
    padding-left: 1rem;
    padding-right: 0;
    max-height: none;
    min-height: 0;
  }
}

@media (max-width: 640px) {
  :root {
    --kx-header-h: 64px;
    --kx-gutter: 1rem;
  }

  .kx-card-grid,
  .kx-data-row {
    grid-template-columns: 1fr;
  }

  .kx-footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .kx-section {
    padding-block: var(--kx-space-5);
  }

  .kx-index__item {
    grid-template-columns: 2.5rem 1fr auto;
    gap: 0.75rem;
  }

  .kx-brand__badge {
    display: none;
  }

  .kx-footer__contact li {
    grid-template-columns: 2.25rem 1fr;
  }
}

/* ============ REDUCED MOTION ============ */
@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;
    transition-delay: 0ms !important;
  }
}