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

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
  scroll-padding-block-start: calc(var(--header-h) + 1rem);
}

body {
  min-height: 100dvh;
  background: var(--void);
  color: var(--fg);
  font-family: var(--font-text);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  font-weight: 400;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

/* Atmosphere: fixed gradient field + faint grain behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(1150px 760px at 88% -12%, rgba(47, 224, 208, 0.16), transparent 62%),
    radial-gradient(1000px 720px at -12% 18%, rgba(75, 99, 216, 0.24), transparent 60%),
    radial-gradient(900px 640px at 50% 118%, rgba(246, 181, 63, 0.09), transparent 62%),
    var(--void);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

img {
  height: auto;
}

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

a {
  color: var(--firouzeh-bright);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

a:hover {
  color: var(--saffron);
}

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

::selection {
  background: rgba(47, 224, 208, 0.32);
  color: #ffffff;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 112%;
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
  text-wrap: balance;
  overflow-wrap: break-word;
}

:lang(fa) h1,
:lang(fa) h2,
:lang(fa) h3,
:lang(fa) h4 {
  font-family: var(--font-fa-display);
  font-weight: 700;
  line-height: 1.5;
}

h1 {
  font-size: var(--text-4xl);
  line-height: var(--leading-tight);
}

h2 {
  font-size: var(--text-3xl);
}

h3 {
  font-size: var(--text-xl);
}

h4 {
  font-size: var(--text-lg);
  font-weight: 600;
}

p,
blockquote {
  max-width: var(--measure);
}

p {
  margin-block: 0 1.1em;
}

p:last-child {
  margin-block-end: 0;
}

ul,
ol {
  padding-inline-start: 1.25em;
}

strong,
b {
  font-weight: 700;
}

small {
  font-size: var(--text-sm);
}

hr {
  border: 0;
  border-block-start: 1px solid var(--line);
  margin-block: var(--space-6);
  max-width: none;
}

code,
kbd,
samp {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--plate-strong);
  border: 1px solid var(--line);
  padding: 0.1em 0.35em;
  border-radius: var(--r-xs);
}

blockquote {
  font-size: var(--text-md);
}

figcaption {
  font-size: var(--text-sm);
  color: var(--fg-soft);
  margin-block-start: var(--space-3);
}

::marker {
  color: var(--firouzeh);
}

[hidden] {
  display: none !important;
}

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

.skip-link {
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: var(--space-4);
  transform: translateY(-130%);
  background: var(--grad-primary);
  color: var(--on-accent);
  font-weight: 700;
  padding: var(--space-3) var(--space-5);
  border-radius: 0 0 var(--r-sm) var(--r-sm);
  z-index: 200;
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
  color: var(--on-accent);
}

/* Typography helpers */
.display {
  font-family: var(--font-display);
  font-stretch: 112%;
  font-weight: 700;
  letter-spacing: var(--tracking-display);
  line-height: var(--leading-display);
}

:lang(fa) .display {
  font-family: var(--font-fa-display);
  font-weight: 700;
  line-height: 1.5;
}

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

.lede {
  font-size: var(--text-md);
  color: var(--fg-soft);
  max-width: 36rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  color: var(--firouzeh-bright);
}

.eyebrow::before {
  content: "";
  inline-size: 1.75rem;
  block-size: 1px;
  background: linear-gradient(90deg, var(--firouzeh), transparent);
}

:where([dir="rtl"]) .eyebrow::before {
  background: linear-gradient(270deg, var(--firouzeh), transparent);
}

.muted {
  color: var(--fg-soft);
}

.faint {
  color: var(--fg-faint);
}

.measure {
  max-width: var(--measure);
}

.stack > * + * {
  margin-block-start: var(--flow, var(--space-4));
}

.pulse-dot {
  inline-size: 0.5rem;
  block-size: 0.5rem;
  border-radius: var(--r-full);
  background: var(--success);
  box-shadow: 0 0 0 0 rgba(56, 211, 159, 0.55);
  animation: pulse 2.4s var(--ease) infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(56, 211, 159, 0.5);
  }
  70% {
    box-shadow: 0 0 0 9px rgba(56, 211, 159, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(56, 211, 159, 0);
  }
}

/* Scroll reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.75s var(--ease-out), transform 0.75s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* Global htmx progress line */
.page-loader {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  block-size: 2px;
  z-index: 300;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease);
}

.page-loader::after {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  inline-size: 32%;
  background: linear-gradient(90deg, transparent, var(--firouzeh), var(--saffron));
  transform: translateX(-110%);
}

body.is-loading .page-loader {
  opacity: 1;
}

body.is-loading .page-loader::after {
  animation: loader-slide 1.2s var(--ease) infinite;
}

@keyframes loader-slide {
  0% {
    transform: translateX(-110%);
  }
  100% {
    transform: translateX(420%);
  }
}

/* -------------------------------- Boot loader -------------------------------- */

html.boot-skip .boot {
  display: none;
}

html.is-booting,
html.is-booting body {
  overflow: hidden;
}

.boot {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: grid;
  place-items: center;
  background:
    radial-gradient(900px 620px at 50% 38%, rgba(75, 99, 216, 0.2), transparent 62%),
    radial-gradient(720px 520px at 82% 8%, rgba(47, 224, 208, 0.14), transparent 60%),
    var(--void);
  transition: opacity 0.7s var(--ease), visibility 0.7s var(--ease);
}

.boot.is-done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.boot__inner {
  display: grid;
  justify-items: center;
  gap: 1.35rem;
  padding: 2rem;
  text-align: center;
}

.boot__mark {
  inline-size: clamp(6.25rem, 16vw, 9.25rem);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  animation: boot-spin 30s linear infinite;
}

.boot__girih {
  inline-size: 100%;
  block-size: auto;
  color: var(--firouzeh-bright);
  filter: drop-shadow(0 0 20px rgba(47, 224, 208, 0.45));
}

.boot__girih :is(path, circle) {
  stroke-dasharray: 460;
  stroke-dashoffset: 460;
  animation: boot-draw 2.4s var(--ease-out) forwards;
}

.boot__girih :is(path, circle):nth-child(odd) {
  animation-delay: 0.18s;
}

.boot__girih > g:last-child {
  opacity: 0;
  animation: boot-fade 1.5s var(--ease) 1.1s forwards;
}

.boot__brand {
  display: grid;
  gap: 0.5rem;
  margin: 0;
}

.boot__latin {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.42em;
  padding-inline-start: 0.42em;
  color: var(--fg);
}

.boot__fa {
  font-size: var(--text-xs);
  color: var(--fg-soft);
}

.boot__bar {
  inline-size: clamp(11rem, 34vw, 15rem);
  block-size: 3px;
  border-radius: var(--r-full);
  background: rgba(146, 172, 255, 0.16);
  overflow: hidden;
}

.boot__fill {
  display: block;
  block-size: 100%;
  inline-size: 0;
  border-radius: inherit;
  background: var(--grad-primary);
  box-shadow: 0 0 18px rgba(47, 224, 208, 0.7);
  transition: inline-size 0.35s var(--ease-out);
}

.boot__pct {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--fg-faint);
  font-variant-numeric: tabular-nums;
}

@keyframes boot-draw {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes boot-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes boot-fade {
  to {
    opacity: 1;
  }
}

/* Native scrollbars, tinted */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(146, 172, 255, 0.28) transparent;
}

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

::-webkit-scrollbar-thumb {
  background: rgba(146, 172, 255, 0.24);
  border-radius: var(--r-full);
  border: 2px solid var(--void);
}

::-webkit-scrollbar-track {
  background: transparent;
}

/* Cross-document view transitions */
@view-transition {
  navigation: auto;
}

::view-transition-old(root) {
  animation-duration: 0.28s;
}

::view-transition-new(root) {
  animation-duration: 0.42s;
}

.masthead {
  view-transition-name: site-header;
}

.footer {
  view-transition-name: site-footer;
}

@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;
  }

  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation: none !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}