/* ==========================================================================
   Kan3an / baranix — Product documentation theme
   Dark surface system, green accent, Syne + Tajawal + JetBrains Mono
   ========================================================================== */

:root {
  --k-bg: #0a0a0a;
  --k-surface: #111111;
  --k-surface-raised: #161b22;
  --k-surface-muted: #141414;
  --k-border: #1f2937;
  --k-text: #f5f5f5;
  --k-muted: #888888;
  --k-primary: #22c55e;
  --k-primary-hover: #16a34a;
  --k-glow: color-mix(in srgb, #22c55e 14%, transparent);
  --k-grid: color-mix(in srgb, #1f2937 40%, transparent);
  --k-info: #3b82f6;
  --font-sans: "Tajawal", system-ui, sans-serif;
  --font-display: "Syne", "Tajawal", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  --radius: 12px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header: 68px;
  --max: 1360px;
  --danger: #ef4444;
  --side: 248px;
  --ink: #052e16;
}

/* --------------------------------------------------------------------------
   Reset & base
   -------------------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header) + 16px);
  scrollbar-width: thin;
  scrollbar-color: var(--k-primary) var(--k-bg);
  -webkit-text-size-adjust: 100%;
}

html::-webkit-scrollbar {
  width: 8px;
}

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

html::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--k-primary) 70%, #14532d);
  border-radius: 999px;
}

html::-webkit-scrollbar-thumb:hover {
  background: var(--k-primary);
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--k-text);
  background:
    radial-gradient(1200px 520px at 12% -10%, var(--k-glow), transparent 58%),
    radial-gradient(900px 420px at 92% 0%, color-mix(in srgb, var(--k-info) 10%, transparent), transparent 55%),
    var(--k-bg);
  overflow-x: hidden;
}

body.is-side-open {
  overflow: hidden;
}

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

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

button,
input {
  font-family: inherit;
}

p,
h1,
h2,
h3,
figure,
pre,
blockquote {
  margin: 0;
}

::selection {
  background: color-mix(in srgb, var(--k-primary) 34%, transparent);
  color: var(--k-text);
}

:focus-visible {
  outline: 2px solid var(--k-primary);
  outline-offset: 3px;
}

.mono {
  font-family: var(--font-mono);
  font-variant-ligatures: none;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--k-primary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.k-wrap {
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
}

/* --------------------------------------------------------------------------
   Skip link
   -------------------------------------------------------------------------- */

.skip {
  position: absolute;
  inset-inline-start: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--k-primary);
  color: var(--ink);
  font-weight: 800;
  font-size: 0.85rem;
  transition: top 0.2s var(--ease);
}

.skip:focus {
  top: 12px;
}

/* --------------------------------------------------------------------------
   Topbar
   -------------------------------------------------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  height: var(--header);
  border-bottom: 1px solid var(--k-border);
  background: color-mix(in srgb, var(--k-bg) 82%, transparent);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  backdrop-filter: blur(18px) saturate(1.2);
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  height: var(--header);
}

.topbar__start {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.nav-toggle {
  display: none;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--k-border);
  border-radius: 10px;
  background: var(--k-surface);
  color: var(--k-text);
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-toggle:hover {
  border-color: color-mix(in srgb, var(--k-primary) 45%, var(--k-border));
  background: color-mix(in srgb, var(--k-primary) 10%, var(--k-surface));
  color: var(--k-primary);
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 16px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.28s var(--ease), top 0.28s var(--ease), opacity 0.2s var(--ease), background 0.2s var(--ease);
}

.nav-toggle__bars {
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
}

.nav-toggle__bars::before {
  top: -5px;
}

.nav-toggle__bars::after {
  top: 5px;
}

body.is-side-open .nav-toggle__bars {
  background: transparent;
}

body.is-side-open .nav-toggle__bars::before {
  top: 0;
  transform: rotate(45deg);
}

body.is-side-open .nav-toggle__bars::after {
  top: 0;
  transform: rotate(-45deg);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--k-text);
}

.brand img {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  border-radius: 10px;
}

.brand strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  white-space: nowrap;
}

.brand strong span {
  color: var(--k-primary);
}

.topbar__nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.topbar__nav a {
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--k-muted);
  font-size: 0.9rem;
  font-weight: 700;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.topbar__nav a:hover,
.topbar__nav a:focus-visible {
  color: var(--k-text);
  background: color-mix(in srgb, var(--k-surface-raised) 80%, transparent);
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Language pill
   -------------------------------------------------------------------------- */

.lang {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--k-border);
  border-radius: 999px;
  background: var(--k-surface-muted);
}

.lang form {
  display: inline;
  margin: 0;
}

.lang button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  padding: 7px 11px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--k-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.lang button:hover {
  color: var(--k-text);
}

.lang button.is-active {
  background: var(--k-primary);
  color: var(--ink);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 16px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease), color 0.22s var(--ease), transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--k-primary);
  color: var(--ink);
  box-shadow: 0 10px 28px color-mix(in srgb, var(--k-primary) 22%, transparent);
}

.btn-primary:hover {
  background: var(--k-primary-hover);
}

.btn-outline {
  border-color: var(--k-border);
  background: color-mix(in srgb, var(--k-surface) 70%, transparent);
  color: var(--k-text);
}

.btn-outline:hover {
  border-color: color-mix(in srgb, var(--k-primary) 50%, var(--k-border));
  background: color-mix(in srgb, var(--k-primary) 8%, var(--k-surface));
}

.btn-ghost {
  background: transparent;
  color: var(--k-muted);
  border-color: transparent;
}

.btn-ghost:hover {
  color: var(--k-text);
  background: var(--k-surface-muted);
}

.btn-sm {
  padding: 8px 12px;
  font-size: 0.78rem;
}

.btn-top {
  padding: 9px 14px;
}

/* --------------------------------------------------------------------------
   Shell + sidebar
   -------------------------------------------------------------------------- */

.shell {
  display: grid;
  grid-template-columns: var(--side) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
  padding: 28px 0 96px;
}

.side-backdrop {
  display: none;
  position: fixed;
  inset: var(--header) 0 0;
  z-index: 70;
  background: color-mix(in srgb, #000 58%, transparent);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s var(--ease);
}

body.is-side-open .side-backdrop {
  opacity: 1;
  pointer-events: auto;
}

.side {
  position: sticky;
  top: calc(var(--header) + 18px);
  max-height: calc(100dvh - var(--header) - 36px);
  overflow: auto;
  padding: 6px 4px 24px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--k-border) transparent;
}

.side__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.side__label {
  margin: 0;
  color: var(--k-muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.side__close {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--k-border);
  border-radius: 10px;
  background: var(--k-surface);
  color: var(--k-text);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
}

.side__close:hover {
  border-color: var(--danger);
  color: var(--danger);
}

.side nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.side nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--k-muted);
  font-size: 0.86rem;
  font-weight: 700;
  line-height: 1.3;
  transition: color 0.18s var(--ease), background 0.18s var(--ease);
}

.side nav a:hover {
  color: var(--k-text);
  background: var(--k-surface);
}

.side nav a.is-active {
  color: var(--k-text);
  background: color-mix(in srgb, var(--k-primary) 10%, var(--k-surface));
  box-shadow: inset 3px 0 0 var(--k-primary);
}

html[dir="rtl"] .side nav a.is-active {
  box-shadow: inset -3px 0 0 var(--k-primary);
}

.side__num {
  flex-shrink: 0;
  width: 26px;
  color: var(--k-primary);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.side__group {
  margin: 16px 10px 6px;
  color: var(--k-muted);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.side__group:first-child {
  margin-top: 0;
}

main {
  min-width: 0;
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin-bottom: 28px;
  padding: 36px 32px 32px;
  border: 1px solid var(--k-border);
  border-radius: calc(var(--radius) + 8px);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--k-surface) 88%, transparent), var(--k-surface-muted));
  box-shadow: 0 24px 80px color-mix(in srgb, #000 42%, transparent);
}

.hero__ambient {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--k-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--k-grid) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 10%, transparent 75%);
  opacity: 0.7;
  animation: grid-shift 28s linear infinite;
}

.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(72px);
  pointer-events: none;
}

.hero__glow--a {
  width: 420px;
  height: 420px;
  top: -140px;
  inset-inline-start: 6%;
  background: var(--k-glow);
  animation: glow-drift 10s var(--ease) infinite alternate;
}

.hero__glow--b {
  width: 340px;
  height: 340px;
  right: 4%;
  bottom: -120px;
  background: color-mix(in srgb, var(--k-info) 16%, transparent);
  animation: glow-drift 12s var(--ease) infinite alternate-reverse;
}

html[dir="rtl"] .hero__glow--b {
  right: auto;
  left: 4%;
}

.hero__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: 36px;
  align-items: center;
}

.hero__copy {
  min-width: 0;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding: 6px 12px;
  border: 1px solid color-mix(in srgb, var(--k-primary) 28%, var(--k-border));
  border-radius: 999px;
  background: color-mix(in srgb, var(--k-primary) 8%, transparent);
  color: var(--k-primary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero__title {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 4.1rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.hero__accent {
  color: var(--k-primary);
}

.hero__lead {
  max-width: 46ch;
  margin-bottom: 22px;
  color: var(--k-muted);
  font-size: 1.05rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  color: var(--k-muted);
  font-size: 0.86rem;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--k-text);
  font-weight: 700;
}

.status__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--k-primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--k-primary) 18%, transparent);
  animation: pulse-dot 1.8s var(--ease) infinite;
}

.sep {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--k-border);
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border: 1px solid var(--k-border);
  border-radius: 999px;
  background: var(--k-surface);
  color: var(--k-text);
  font-size: 0.72rem;
  font-weight: 600;
}

.hero__panel {
  min-width: 0;
  transition: transform 0.45s var(--ease);
}

/* --------------------------------------------------------------------------
   Stage / windows / terminal
   -------------------------------------------------------------------------- */

.stage {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(170px, 0.78fr);
  gap: 16px;
  align-items: end;
}

.stage__figure,
.stage__stack {
  transition: transform 0.35s var(--ease);
  will-change: transform;
}

.stage__figure {
  position: relative;
  margin: 0;
}

.stage__glow {
  position: absolute;
  inset: 18% 10% 8%;
  z-index: 0;
  border-radius: 40%;
  background: var(--k-glow);
  filter: blur(34px);
  pointer-events: none;
}

.stage__portrait {
  position: relative;
  z-index: 1;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--k-primary) 28%, var(--k-border));
  border-radius: 22px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--k-primary) 8%, var(--k-surface-raised)), var(--k-surface));
  box-shadow: 0 22px 50px color-mix(in srgb, #000 45%, transparent);
}

.stage__portrait img {
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  object-position: top center;
  filter: saturate(1.05) contrast(1.04);
}

.stage__caption {
  position: absolute;
  z-index: 2;
  inset-inline-start: 12px;
  bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border: 1px solid var(--k-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--k-bg) 78%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  color: var(--k-text);
  font-size: 0.72rem;
  font-weight: 600;
}

.stage__stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-bottom: 18px;
}

.win,
.term {
  overflow: hidden;
  border: 1px solid var(--k-border);
  border-radius: var(--radius);
  background: var(--k-surface-raised);
  box-shadow: 0 16px 40px color-mix(in srgb, #000 38%, transparent);
}

.win__bar,
.term__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--k-border);
  background: color-mix(in srgb, #000 22%, var(--k-surface-raised));
  color: var(--k-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.win__dots,
.frame__dots {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.win__dots i,
.frame__dots i {
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.win__dots i:nth-child(1),
.frame__dots i:nth-child(1) {
  background: #ff5f57;
}

.win__dots i:nth-child(2),
.frame__dots i:nth-child(2) {
  background: #febc2e;
}

.win__dots i:nth-child(3),
.frame__dots i:nth-child(3) {
  background: #28c840;
}

.win pre {
  margin: 0;
  padding: 12px 12px 14px;
  overflow-x: auto;
  color: var(--k-text);
  font-size: 0.72rem;
  line-height: 1.7;
  white-space: pre;
}

.kw {
  color: var(--k-primary);
  font-weight: 600;
}

.cmt {
  color: var(--k-muted);
  font-style: italic;
}

.ok {
  color: var(--k-primary);
}

.term {
  padding: 0 0 10px;
}

.term p {
  margin: 0;
  padding: 4px 12px;
  font-size: 0.72rem;
  line-height: 1.7;
  color: var(--k-text);
}

.term p:first-of-type {
  padding-top: 10px;
}

/* --------------------------------------------------------------------------
   Land-in
   -------------------------------------------------------------------------- */

.land {
  opacity: 0;
  transform: translateY(18px);
}

.hero.is-land .land {
  animation: land-in 0.72s var(--ease) forwards;
  animation-delay: calc(var(--i, 0) * 90ms);
}

/* --------------------------------------------------------------------------
   Overview / panel
   -------------------------------------------------------------------------- */

.panel {
  margin-bottom: 36px;
}

.overview {
  padding: 0;
}

.overview__board {
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(0, 1.28fr);
  gap: 28px;
  align-items: stretch;
  padding: 22px;
  border: 1px solid var(--k-border);
  border-radius: calc(var(--radius) + 8px);
  background: var(--k-surface);
}

.overview__visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 320px;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--k-border);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 50% 20%, color-mix(in srgb, var(--k-primary) 16%, transparent), transparent 48%),
    var(--k-surface-muted);
}

.overview__glow {
  position: absolute;
  width: 70%;
  height: 55%;
  bottom: 8%;
  border-radius: 50%;
  background: var(--k-glow);
  filter: blur(40px);
  pointer-events: none;
}

.overview__portrait {
  position: relative;
  z-index: 1;
  width: min(78%, 260px);
}

.overview__portrait img {
  width: 100%;
  height: auto;
  max-height: 340px;
  object-fit: contain;
  filter: drop-shadow(0 18px 30px color-mix(in srgb, #000 50%, transparent));
}

.overview__floats {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.overview__float {
  position: absolute;
  padding: 6px 10px;
  border: 1px solid var(--k-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--k-bg) 72%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--k-text);
  font-size: 0.68rem;
  font-weight: 600;
  box-shadow: 0 10px 24px color-mix(in srgb, #000 28%, transparent);
  animation: float-chip 6.5s var(--ease) infinite;
}

.overview__float--a {
  top: 10%;
  inset-inline-start: 6%;
  animation-delay: 0s;
}

.overview__float--b {
  top: 18%;
  inset-inline-end: 6%;
  animation-delay: 0.4s;
}

.overview__float--c {
  top: 48%;
  inset-inline-start: 2%;
  animation-delay: 0.8s;
}

.overview__float--d {
  bottom: 22%;
  inset-inline-end: 4%;
  animation-delay: 1.1s;
}

.overview__float--e {
  bottom: 10%;
  inset-inline-start: 18%;
  animation-delay: 1.5s;
}

.overview__main {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.overview__intro h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.4vw, 2.05rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.overview__intro p:last-child {
  color: var(--k-muted);
  font-size: 0.98rem;
}

.facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 12px 14px;
  border: 1px solid var(--k-border);
  border-radius: var(--radius);
  background: var(--k-surface-muted);
}

.fact span {
  color: var(--k-muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.fact strong {
  color: var(--k-text);
  font-size: 0.92rem;
  font-weight: 800;
  word-break: break-word;
}

.tech-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 11px;
  border: 1px solid var(--k-border);
  border-radius: 999px;
  background: var(--k-surface-raised);
  color: var(--k-text);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
}

.tech-chip.is-accent {
  border-color: color-mix(in srgb, var(--k-primary) 40%, var(--k-border));
  background: color-mix(in srgb, var(--k-primary) 12%, var(--k-surface-raised));
  color: var(--k-primary);
}

.pages {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--k-border);
  border-radius: 999px;
  background: var(--k-surface-muted);
  color: var(--k-text);
  font-size: 0.82rem;
  font-weight: 700;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-pill i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--k-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--k-primary) 16%, transparent);
}

.page-pill:hover {
  border-color: color-mix(in srgb, var(--k-primary) 45%, var(--k-border));
  background: color-mix(in srgb, var(--k-primary) 8%, var(--k-surface-muted));
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   Chapters / blocks / frames
   -------------------------------------------------------------------------- */

.chapter {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin: 42px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--k-border);
}

.chapter h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.chapter span {
  color: var(--k-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
}

.block {
  margin-bottom: 18px;
  padding: 16px;
  border: 1px solid var(--k-border);
  border-radius: calc(var(--radius) + 4px);
  background: var(--k-surface);
  scroll-margin-top: calc(var(--header) + 14px);
}

.block__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.block__actions {
  flex-shrink: 0;
}

.block__identity {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-width: 0;
}

.block__index {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--k-primary) 28%, var(--k-border));
  border-radius: 12px;
  background: color-mix(in srgb, var(--k-primary) 10%, var(--k-surface-muted));
  color: var(--k-primary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
}

.block__identity h3 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.block__identity p {
  color: var(--k-muted);
  font-size: 0.9rem;
}

.frame {
  overflow: hidden;
  border: 1px solid var(--k-border);
  border-radius: var(--radius);
  background: var(--k-surface-raised);
}

.frame__chrome {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--k-border);
  background: color-mix(in srgb, #000 18%, var(--k-surface-raised));
}

.frame__url {
  flex: 1;
  min-width: 0;
  padding: 5px 10px;
  border: 1px solid var(--k-border);
  border-radius: 8px;
  background: var(--k-bg);
  color: var(--k-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.frame__url strong {
  color: var(--k-text);
  font-weight: 600;
}

.frame__shot {
  margin: 0;
  background: #0c0c0c;
}

.frame__shot img {
  width: 100%;
  height: auto;
  display: block;
}

.shot-fallback {
  display: grid;
  place-items: center;
  min-height: 180px;
  padding: 28px 18px;
  color: var(--k-muted);
  background:
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 10px,
      color-mix(in srgb, var(--k-border) 35%, transparent) 10px,
      color-mix(in srgb, var(--k-border) 35%, transparent) 11px
    ),
    var(--k-surface-muted);
  font-size: 0.9rem;
  text-align: center;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.doc-footer {
  border-top: 1px solid var(--k-border);
  padding: 22px 20px 36px;
  text-align: center;
  color: var(--k-muted);
  font-size: 0.82rem;
}

.doc-footer p {
  margin: 0;
}

/* --------------------------------------------------------------------------
   Keyframes
   -------------------------------------------------------------------------- */

@keyframes land-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-dot {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(0.82);
  }
}

@keyframes glow-drift {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }
  to {
    transform: translate3d(18px, 12px, 0) scale(1.06);
  }
}

@keyframes grid-shift {
  from {
    background-position: 0 0, 0 0;
  }
  to {
    background-position: 44px 44px, 44px 44px;
  }
}

@keyframes float-chip {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-7px);
  }
}

/* --------------------------------------------------------------------------
   RTL extras
   -------------------------------------------------------------------------- */

html[dir="rtl"] {
  font-family: var(--font-sans);
}

html[dir="rtl"] .hero__title,
html[dir="rtl"] .overview__intro h2,
html[dir="rtl"] .block__identity h3,
html[dir="rtl"] .chapter h2,
html[dir="rtl"] .brand strong {
  font-family: var(--font-sans);
  letter-spacing: 0;
}

html[dir="rtl"] .win pre,
html[dir="rtl"] .term,
html[dir="rtl"] .frame__url,
html[dir="rtl"] .chip.mono,
html[dir="rtl"] .overview__float,
html[dir="rtl"] .tech-chip,
html[dir="rtl"] .side__num,
html[dir="rtl"] .block__index {
  direction: ltr;
  text-align: left;
}

html[dir="rtl"] .hero__actions .btn span[aria-hidden="true"],
html[dir="rtl"] .btn-top span[aria-hidden="true"] {
  display: inline-block;
  transform: scaleX(-1);
}

/* --------------------------------------------------------------------------
   Mobile drawer — 900px
   -------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .k-wrap {
    width: min(100% - 28px, var(--max));
  }

  .nav-toggle {
    display: inline-flex;
  }

  .topbar__nav {
    display: none;
  }

  .shell {
    display: block;
    padding-top: 18px;
  }

  .side-backdrop {
    display: block;
  }

  .side {
    position: fixed;
    top: var(--header);
    bottom: 0;
    inset-inline-start: 0;
    z-index: 80;
    width: min(320px, 88vw);
    max-height: none;
    margin: 0;
    padding: 16px 16px 28px;
    overflow: auto;
    border-inline-end: 1px solid var(--k-border);
    background: color-mix(in srgb, var(--k-bg) 96%, transparent);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    box-shadow: 18px 0 50px color-mix(in srgb, #000 42%, transparent);
    transform: translateX(-110%);
    transition: transform 0.32s var(--ease);
  }

  html[dir="rtl"] .side {
    box-shadow: -18px 0 50px color-mix(in srgb, #000 42%, transparent);
    transform: translateX(110%);
  }

  body.is-side-open .side,
  html[dir="rtl"] body.is-side-open .side {
    transform: translateX(0);
  }

  .side__close {
    display: inline-flex;
  }

  .hero {
    padding: 24px 18px 20px;
  }

  .hero__layout,
  .stage,
  .overview__board {
    grid-template-columns: 1fr;
  }

  .hero__lead {
    max-width: none;
  }

  .facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stage__stack {
    padding-bottom: 0;
  }

  .overview__visual {
    min-height: 280px;
  }
}

/* --------------------------------------------------------------------------
   Compact — 640px
   -------------------------------------------------------------------------- */

@media (max-width: 640px) {
  .k-wrap {
    width: min(100% - 20px, var(--max));
  }

  .topbar__inner {
    gap: 8px;
  }

  .brand strong {
    font-size: 0.95rem;
  }

  .btn-top .btn-label {
    display: none;
  }

  .btn-top {
    min-width: 40px;
    padding: 9px 11px;
  }

  .hero {
    padding: 20px 14px 16px;
    border-radius: var(--radius);
  }

  .hero__title {
    font-size: clamp(1.9rem, 10vw, 2.5rem);
  }

  .hero__lead {
    font-size: 0.95rem;
  }

  .hero__actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .stage__stack {
    display: none;
  }

  .stage {
    max-width: 280px;
    margin-inline: auto;
  }

  .overview__board,
  .block {
    padding: 14px;
  }

  .block__top {
    flex-direction: column;
  }

  .facts {
    grid-template-columns: 1fr 1fr;
  }

  .overview__float--c,
  .overview__float--e {
    display: none;
  }

  .chapter {
    margin-top: 28px;
  }

  .frame__chrome {
    gap: 8px;
  }
}

/* --------------------------------------------------------------------------
   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;
    scroll-behavior: auto !important;
  }

  .land,
  .hero.is-land .land {
    opacity: 1;
    transform: none;
    animation: none;
  }

  .status__dot,
  .hero__grid,
  .hero__glow,
  .overview__float {
    animation: none;
  }

  .stage__figure,
  .stage__stack,
  .hero__panel {
    transform: none !important;
    transition: none;
  }

  .btn:hover,
  .page-pill:hover {
    transform: none;
  }
}