/* ==========================================================================
   HERO AI — Base / Reset
   ========================================================================== */

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Yekan Bakh', Tahoma, sans-serif;
  font-weight: 400;
  font-size: var(--fs-base);
  line-height: 1.85;
  color: var(--text);
  background: var(--bg);
  direction: rtl;
  text-align: right;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 { margin: 0 0 var(--s-3); font-weight: 700; line-height: 1.45; letter-spacing: -.2px; }
h1 { font-size: var(--fs-3xl); line-height: 1.3; }
h2 { font-size: var(--fs-2xl); line-height: 1.35; }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }
h5 { font-size: var(--fs-md); }
p  { margin: 0 0 var(--s-4); color: var(--text-2); }

a { color: var(--blue-500); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--violet-500); }

img { max-width: 100%; display: block; }
ul, ol { padding-inline-start: 1.3em; margin: 0 0 var(--s-4); }
li { margin-bottom: var(--s-2); color: var(--text-2); }

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

:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

::selection { background: rgba(61,123,240,.18); }

/* ——— LTR islands inside an RTL document ——— */
.ltr, code, pre, .mono, .num, .endpoint, .api-key, time, .metric-value {
  direction: ltr;
  unicode-bidi: isolate;
  text-align: left;
}
td.num, th.num { text-align: left; }

/* ——— Utilities ——— */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--s-5); }
.container-narrow { max-width: 820px; }
.section { padding-block: var(--s-9); }
.section-sm { padding-block: var(--s-7); }
.text-center { text-align: center; }
.text-2 { color: var(--text-2); }
.muted { color: var(--text-3); font-size: var(--fs-sm); }
.hidden { display: none !important; }
.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;
}

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

.stack-1 > * + * { margin-top: var(--s-1); }
.stack-2 > * + * { margin-top: var(--s-2); }
.stack-3 > * + * { margin-top: var(--s-3); }
.stack-4 > * + * { margin-top: var(--s-4); }
.stack-5 > * + * { margin-top: var(--s-5); }

.row { display: flex; align-items: center; gap: var(--s-3); }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--s-3); }
.wrap { flex-wrap: wrap; }
.grow { flex: 1; }

.grid { display: grid; gap: var(--s-5); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1000px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  :root { --fs-3xl: 30px; --fs-2xl: 24px; --fs-xl: 20px; }
  .section { padding-block: var(--s-7); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}