/* Mobile-first: base rules are for phones, @media (min-width) layers on tablet and desktop. */

/* Tokens ----------------------------------------------------------------- */
:root {
  color-scheme: light dark;

  --bg: light-dark(oklch(0.985 0.004 90), oklch(0.165 0.014 268));
  --surface: light-dark(oklch(1 0 0), oklch(0.205 0.016 268));
  --surface-2: light-dark(oklch(0.962 0.006 90), oklch(0.24 0.018 268));
  --text: light-dark(oklch(0.22 0.02 268), oklch(0.955 0.008 268));
  --muted: light-dark(oklch(0.47 0.02 268), oklch(0.74 0.02 268));
  --line: light-dark(oklch(0.9 0.008 268), oklch(0.31 0.018 268));
  --accent: light-dark(oklch(0.5 0.2 268), oklch(0.79 0.14 268));
  --accent-ink: light-dark(oklch(1 0 0), oklch(0.18 0.03 268));
  --accent-soft: light-dark(oklch(0.955 0.035 268), oklch(0.27 0.07 268));

  --radius: 16px;
  --maxw: 70rem;
  --gutter: 1.1rem;
  --header-h: 3.5rem;

  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-fa: "Vazirmatn", "Vazir", "IRANSansX", "Segoe UI", Tahoma, "Noto Sans Arabic", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Consolas, "Liberation Mono", monospace;
}
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }

/* Base ------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-block-start: calc(var(--header-h) + 0.5rem); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1.0625rem/1.65 var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overflow-x: clip;
  padding-block-end: calc(4.75rem + env(safe-area-inset-bottom));
}
html[lang="fa"] body { font-family: var(--font-fa); line-height: 1.95; }
h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: var(--accent); text-underline-offset: 0.2em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
main:focus { outline: none; }
button { font: inherit; color: inherit; cursor: pointer; touch-action: manipulation; }
a, button { -webkit-touch-callout: none; }
::selection { background: var(--accent-soft); }
bdi { unicode-bidi: isolate; }

body::before {
  content: "";
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(40rem 22rem at 90% -6%, color-mix(in oklch, var(--accent) 16%, transparent), transparent 65%),
    radial-gradient(30rem 20rem at 0% 35%, color-mix(in oklch, var(--accent) 8%, transparent), transparent 70%);
}
[dir="rtl"] body::before { transform: scaleX(-1); }

.tech { direction: ltr; unicode-bidi: isolate; display: inline-block; }
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }

.skip {
  position: fixed; inset-block-start: 0.5rem; inset-inline-start: 0.5rem; z-index: 100;
  padding: 0.6rem 1rem; background: var(--accent); color: var(--accent-ink); border-radius: 8px;
  transform: translateY(-200%); text-decoration: none;
}
.skip:focus { transform: none; }

/* Header: one compact row on phones ------------------------------------- */
.bar {
  position: sticky; inset-block-start: 0; z-index: 50;
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-block-end: 1px solid var(--line);
  transition: transform 0.25s ease;
}
.bar.is-hidden { transform: translateY(-100%); }
@media (prefers-reduced-motion: reduce) { .bar { transition: none; } }
.bar-in { max-width: var(--maxw); margin-inline: auto; padding: 0 var(--gutter); min-block-size: var(--header-h); display: flex; align-items: center; gap: 0.75rem; }
.brand { display: inline-flex; flex-shrink: 0; align-items: center; gap: 0.6rem; font-weight: 700; color: var(--text); text-decoration: none; white-space: nowrap; margin-inline-end: auto; }
.mark {
  display: grid; place-items: center; inline-size: 2.1rem; block-size: 2.1rem; border-radius: 0.65rem;
  background: var(--accent); color: var(--accent-ink); font: 700 0.8rem/1 var(--font-sans); letter-spacing: 0.02em;
}
.nav { display: none; flex-shrink: 0; gap: 0.1rem; }
.nav a { display: inline-block; padding: 0.4rem 0.6rem; border-radius: 999px; color: var(--muted); text-decoration: none; font-size: 0.92rem; white-space: nowrap; }
.nav a:hover, .nav a[aria-current="true"] { color: var(--text); background: var(--surface-2); }
.ctl { display: flex; flex-shrink: 0; align-items: center; gap: 0.5rem; }
.bar .seg-view { display: none; }

.seg { display: inline-flex; padding: 3px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); }
.seg button, .seg a {
  display: inline-flex; align-items: center; justify-content: center;
  min-block-size: 2.5rem; padding: 0.25rem 1rem; border: 0; border-radius: 999px; background: transparent;
  text-decoration: none; white-space: nowrap; font-size: 0.92rem; font-weight: 500; color: var(--muted); line-height: 1.3;
}
.seg button:hover, .seg a:hover { color: var(--text); }
.seg button[aria-pressed="true"], .seg a[aria-current="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 700; }
.icon {
  display: grid; place-items: center; inline-size: 2.75rem; block-size: 2.75rem; padding: 0;
  border: 1px solid var(--line); border-radius: 50%; background: var(--surface); color: var(--text);
}
.icon:hover { background: var(--surface-2); }
.i-moon { display: none; }
:root[data-theme="dark"] .i-sun { display: none; }
:root[data-theme="dark"] .i-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root[data-theme="auto"] .i-sun { display: none; }
  :root[data-theme="auto"] .i-moon { display: block; }
}

/* Layout ----------------------------------------------------------------- */
.sec { max-width: var(--maxw); margin-inline: auto; padding: 2.5rem var(--gutter); scroll-margin-block-start: calc(var(--header-h) + 0.5rem); }
.sec > h2 { font-size: clamp(1.5rem, 1.15rem + 1.6vw, 2.15rem); line-height: 1.25; letter-spacing: -0.015em; margin-block-end: 1.25rem; text-wrap: balance; }
html[lang="fa"] .sec > h2 { letter-spacing: 0; line-height: 1.5; }
.grid { display: grid; gap: 0.85rem; }
.cols-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); }
.cols-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); }
.services { grid-template-columns: repeat(auto-fit, minmax(min(100%, 14.5rem), 1fr)); }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.15rem; transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.card h3 { font-size: 1.1rem; line-height: 1.4; margin-block-end: 0.45rem; text-wrap: balance; }
.card p { color: var(--muted); text-wrap: pretty; }
@media (hover: hover) {
  .card:hover { transform: translateY(-3px); border-color: color-mix(in oklch, var(--accent) 45%, var(--line)); box-shadow: 0 12px 32px -18px color-mix(in oklch, var(--accent) 60%, transparent); }
}

/* Hero ------------------------------------------------------------------- */
.hero { max-width: var(--maxw); margin-inline: auto; padding: 1.25rem var(--gutter) 0.5rem; }
.hero-switch { margin-block-end: 1.5rem; }
.hero-switch .cap { display: block; margin-block-end: 0.4rem; color: var(--muted); font-size: 0.85rem; }
.seg-hero { display: flex; }
.seg-hero button { flex: 1; min-block-size: 2.75rem; }
.hero-switch .cap { text-align: center; }
.hero-grid { display: grid; gap: 1.1rem; justify-items: center; }
.hero-text { justify-self: stretch; }
.portrait { order: -1; inline-size: 9.5rem; aspect-ratio: 1; }
.portrait img {
  display: block; inline-size: 100%; block-size: 100%; object-fit: cover; object-position: 50% 30%; border-radius: 50%; background: var(--surface-2);
  box-shadow: 0 0 0 4px var(--bg), 0 0 0 6px color-mix(in oklch, var(--accent) 55%, transparent), 0 24px 44px -22px color-mix(in oklch, var(--accent) 60%, transparent);
}
.hero h1 { text-align: center; font-size: clamp(2.25rem, 1.2rem + 5vw, 4.2rem); line-height: 1.1; letter-spacing: -0.03em; font-weight: 780; text-wrap: balance; }
html[lang="fa"] .hero h1 { letter-spacing: 0; line-height: 1.35; }
.role { text-align: center; margin-block-start: 0.4rem; color: var(--accent); font-weight: 600; font-size: 1.1rem; line-height: 1.5; text-wrap: balance; }
.lead { margin-block-start: 1.1rem; max-inline-size: 40rem; font-size: 1.05rem; color: var(--muted); text-wrap: pretty; }
.cta { display: flex; flex-wrap: wrap; gap: 0.65rem; margin-block-start: 1.5rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem; min-block-size: 2.9rem; padding: 0.5rem 1.2rem;
  border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--text);
  text-decoration: none; font-weight: 600; font-size: 0.98rem; transition: transform 0.15s ease, background 0.15s ease;
}
.hero .cta .btn.primary, .contact .cta .btn.primary { flex: 1 1 100%; }
.hero .cta .btn:not(.primary) { flex: 1 1 auto; }
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn:active { transform: scale(0.98); }
.btn.primary { background: var(--accent); border-color: transparent; color: var(--accent-ink); }
.btn.primary:hover { background: color-mix(in oklch, var(--accent) 88%, var(--text)); }

@media (prefers-reduced-motion: no-preference) {
  .hero-grid > *, .hero-text > * { animation: rise 0.55s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .hero-text > :nth-child(2) { animation-delay: 0.05s; }
  .hero-text > :nth-child(3) { animation-delay: 0.1s; }
  .hero-text > :nth-child(4) { animation-delay: 0.15s; }
  @keyframes rise { from { opacity: 0; transform: translateY(12px); } }
}

/* Numbers ---------------------------------------------------------------- */
.sec-numbers { padding-block: 1.5rem 0.5rem; }
.sec-numbers > h2 { font-size: 1.05rem; margin-block-end: 0.2rem; }
.sub { margin-block-end: 0.9rem; color: var(--muted); font-size: 0.95rem; }
.metrics { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.65rem; }
.metrics li { padding: 0.95rem 1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.metrics strong { display: block; font: 700 clamp(1.4rem, 1rem + 1.5vw, 2.1rem)/1.1 var(--font-mono); color: var(--accent); font-variant-numeric: tabular-nums; }
html[lang="fa"] .metrics strong { font-family: var(--font-fa); font-weight: 800; }
.metrics .l { display: block; margin-block-start: 0.4rem; font-size: 0.92rem; font-weight: 600; line-height: 1.4; }
.metrics .src { display: block; margin-block-start: 0.4rem; padding-block-start: 0.4rem; border-block-start: 1px dashed var(--line); color: var(--muted); font-size: 0.8rem; line-height: 1.5; }

/* Services --------------------------------------------------------------- */
.ico {
  display: grid; place-items: center; inline-size: 2.6rem; block-size: 2.6rem;
  border-radius: 0.8rem; background: var(--accent-soft); color: var(--accent);
}
.card:not(.core) .ico { margin-block-end: 0.8rem; }

/* core card: icon in its own column, badge/heading/body stacked beside it — same structure at every width */
.card.core {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 1rem;
  row-gap: 0.3rem;
  align-items: start;
  background: linear-gradient(135deg, var(--accent-soft), var(--surface) 70%);
  border-color: color-mix(in oklch, var(--accent) 35%, var(--line));
}
.card.core .ico { grid-row: 1 / 4; background: var(--accent); color: var(--accent-ink); }
.card.core .tag { grid-row: 1; justify-self: start; }
.card.core h3 { grid-row: 2; font-size: 1.25rem; }
.card.core p { grid-row: 3; }
.tag {
  display: inline-block; padding: 0.15rem 0.6rem; border-radius: 999px; line-height: 1.5;
  background: var(--surface); border: 1px solid color-mix(in oklch, var(--accent) 40%, var(--line));
  color: var(--accent); font-size: 0.78rem; font-weight: 700;
}

/* Timeline --------------------------------------------------------------- */
.tl { display: grid; gap: 1.75rem; }
.tl-item { display: grid; gap: 0.3rem; }
.tl-when { color: var(--muted); font: 500 0.85rem/1.5 var(--font-mono); }
html[lang="fa"] .tl-when { font-family: var(--font-fa); font-size: 0.92rem; }
.tl-body { position: relative; padding-inline-start: 1.3rem; border-inline-start: 1px solid var(--line); }
.tl-body::before {
  content: ""; position: absolute; inset-inline-start: -5px; inset-block-start: 0.55rem;
  inline-size: 9px; block-size: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--bg);
}
.tl-body h3 { font-size: 1.12rem; line-height: 1.4; }
.org { margin-block: 0.1rem 0.65rem; color: var(--accent); font-weight: 600; }
.tl-text { color: var(--muted); text-wrap: pretty; }
.tl-body ul { display: grid; gap: 0.6rem; color: var(--muted); }
.tl-body li { position: relative; padding-inline-start: 1rem; text-wrap: pretty; }
.tl-body li::before { content: ""; position: absolute; inset-inline-start: 0; inset-block-start: 0.85em; inline-size: 5px; block-size: 5px; border-radius: 50%; background: var(--line); }

/* Chips & plain lists ---------------------------------------------------- */
.chips { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.chips li { padding: 0.3rem 0.75rem; border: 1px solid var(--line); border-radius: 999px; background: var(--surface-2); font-size: 0.88rem; }
.plain { display: grid; gap: 0.55rem; color: var(--muted); }
.plain strong { color: var(--text); font-weight: 600; }
.note { margin-block: -0.15rem 0.7rem; font-size: 0.85rem; }

/* Contact ---------------------------------------------------------------- */
.contact { padding: 1.4rem 1.15rem; border-radius: calc(var(--radius) + 6px); background: linear-gradient(135deg, var(--accent-soft), var(--surface) 70%); }
.contact:hover { transform: none; box-shadow: none; }
.contact h2 { font-size: clamp(1.6rem, 1.15rem + 2vw, 2.4rem); line-height: 1.25; margin-block-end: 0.6rem; }
.contact .lead { margin-block-start: 0; }
.reach { margin-block-start: 1.5rem; border-block-start: 1px solid var(--line); }
.reach li { display: grid; gap: 0.15rem; padding-block: 0.8rem; border-block-end: 1px solid var(--line); }
.reach .k { color: var(--muted); font-size: 0.85rem; }
.reach .v { display: flex; flex-wrap: wrap; align-items: center; gap: 0.35rem 1rem; font-weight: 500; }
.reach a { color: var(--text); text-underline-offset: 0.25em; display: inline-flex; align-items: center; gap: 0.3rem; min-block-size: 2.5rem; }
.reach a:hover { color: var(--accent); }
.reach .side { font-size: 0.92rem; font-weight: 400; color: var(--accent); }
.copy {
  display: none; min-block-size: 2.25rem; padding: 0.2rem 0.9rem; border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface); font-size: 0.85rem; color: var(--muted);
}
.js .copy { display: inline-block; }
.copy:hover { color: var(--text); background: var(--surface-2); }
.copy[data-state="done"] { color: var(--accent); border-color: var(--accent); }

/* Footer + quick-contact bar (phones) ------------------------------------ */
.foot { border-block-start: 1px solid var(--line); padding-block: 1.5rem 1.5rem; color: var(--muted); font-size: 0.9rem; }
.foot-in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem; }
.foot a { color: var(--muted); display: inline-flex; align-items: center; gap: 0.35rem; min-block-size: 2.5rem; }
.foot a:hover { color: var(--text); }

.dock {
  position: fixed; inset-inline: 0; inset-block-end: 0; z-index: 60;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.5rem;
  padding: 0.55rem 0.75rem calc(0.55rem + env(safe-area-inset-bottom));
  background: color-mix(in oklab, var(--bg) 92%, transparent); backdrop-filter: saturate(1.4) blur(10px);
  border-block-start: 1px solid var(--line); transition: transform 0.25s ease;
}
.dock.is-away { transform: translateY(110%); }
.dock a {
  display: flex; align-items: center; justify-content: center; gap: 0.45rem; min-block-size: 2.9rem;
  border: 1px solid var(--line); border-radius: 0.9rem; background: var(--surface);
  color: var(--text); text-decoration: none; font-size: 0.92rem; font-weight: 600;
}
.dock a.wa { background: var(--accent); border-color: transparent; color: var(--accent-ink); }
.dock a:active { transform: scale(0.97); }

/* Tablet and up ---------------------------------------------------------- */
@media (min-width: 40rem) {
  :root { --gutter: 1.5rem; }
  .hero { padding-block: 2.5rem 1rem; }
  .hero-grid { grid-template-columns: 1fr auto; align-items: center; justify-items: stretch; gap: 3rem; }
  .portrait { order: 0; inline-size: clamp(11rem, 26vw, 16rem); }
  .portrait img { border-radius: 2rem; object-position: 50% 50%; box-shadow: 0 0 0 1px var(--line), 0 24px 48px -24px color-mix(in oklch, var(--accent) 55%, transparent); }
  .hero h1, .role { text-align: start; }
  .hero-switch .cap { text-align: start; }
  .role { font-size: 1.3rem; }
  .lead { font-size: 1.15rem; }
  .hero .cta .btn.primary, .contact .cta .btn.primary { flex: 0 0 auto; }
  .hero .cta .btn:not(.primary) { flex: 0 0 auto; }
  .sec { padding-block: 3.5rem; }
  .card { padding: 1.5rem; }
  .card.core { column-gap: 1.25rem; }
  .card.core .ico { inline-size: 3.2rem; block-size: 3.2rem; }
  .card.core p { max-inline-size: 46rem; }
  .tl-item { grid-template-columns: 10.5rem 1fr; gap: 1.5rem; }
  .tl-when { padding-block-start: 0.2rem; }
  .tl-body { padding-inline-start: 1.6rem; }
  .reach li { display: flex; align-items: center; gap: 0.4rem 1.5rem; }
  .reach .k { flex: 0 0 9.5rem; font-size: 0.92rem; }
  .contact { padding: 2.5rem; }
}
@media (min-width: 48rem) {
  :root { --header-h: 4rem; }
  body { padding-block-end: 0; }
  .hero-switch { display: none; }
  .bar .seg-view { display: inline-flex; }
  .seg button, .seg a { min-block-size: 2rem; padding-inline: 0.8rem; font-size: 0.85rem; }
  .icon { inline-size: 2.4rem; block-size: 2.4rem; }
  .dock { display: none; }
  .metrics { grid-template-columns: repeat(4, 1fr); }
  .sec-numbers { padding-block: 2rem 0.5rem; }
}
@media (min-width: 40rem) and (max-width: 47.99rem) { .hero-switch { margin-block-end: 1.75rem; } }
@media (min-width: 72rem) { .nav { display: flex; } }

/* Print: the technical view doubles as a CV ------------------------------ */
@media print {
  :root { color-scheme: light; }
  .bar, .cta, .skip, .dock, .hero-switch, body::before { display: none !important; }
  body { background: #fff; color: #000; padding: 0; }
  .card, .metrics li { box-shadow: none; break-inside: avoid; }
  .sec { padding-block: 1rem; }
  a { color: inherit; }
}