/* =====================================================================
   PikoSystem — main stylesheet
   Palette: arootinshahbazi.ir light theme. Logical properties throughout
   so the same rules serve RTL (fa) and LTR (en).
   ===================================================================== */

@font-face {
  font-family: "Vazirmatn";
  src: url("../fonts/Vazirmatn-wght.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: "JB Mono";
  src: url("../fonts/JetBrainsMono-wght.woff2") format("woff2");
  font-weight: 100 800;
  font-display: swap;
}

:root {
  --accent: #0e7c72;
  --accent-ink: #ffffff;
  --accent-2: #e27d5f;
  --coral-deep: #b2593f;           /* accent-2 darkened for text/buttons (AA on white) */
  --blue: #6a7fc6;
  --blue-deep: #5a6fb5;
  --led: #22a55b;

  --paper: #f1f8f6;
  --paper-2: #ffffff;
  --tint: color-mix(in srgb, #0e7c72 12%, #fff);
  --tint-2: color-mix(in srgb, #e27d5f 12%, #fff);
  --tint-3: #eef1f8;
  --tint-led: color-mix(in srgb, #22a55b 11%, #fff);
  --sel: color-mix(in srgb, #0e7c72 22%, #fff);

  --ink: #1b2a2e;
  --ink-2: #4c5b60;
  --ink-3: #8a979b;
  --rule: #dfe7e6;
  --rule-2: #e9efee;

  --shadow: 0 1px 2px rgba(27, 42, 46, .04), 0 10px 30px -14px rgba(27, 42, 46, .16);
  --shadow-lg: 0 2px 4px rgba(27, 42, 46, .04), 0 24px 50px -24px rgba(14, 124, 114, .28);
  --blob-1: color-mix(in srgb, #0e7c72 14%, transparent);
  --blob-2: color-mix(in srgb, #e27d5f 14%, transparent);
  --bg:
    radial-gradient(1100px 680px at 100% -10%, #d9efea 0%, transparent 62%),
    radial-gradient(900px 620px at -10% 105%, #e3e9fb 0%, transparent 60%),
    linear-gradient(170deg, #f1f8f6 0%, #ebf2f8 100%);

  --sans: "Vazirmatn", Tahoma, system-ui, sans-serif;
  --mono: "JB Mono", ui-monospace, Consolas, monospace;
  --r: 18px;
  --r-sm: 12px;
  --wrap: 1200px;
  --gut: clamp(18px, 4vw, 40px);
  --top-h: 72px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --dx: 1;                          /* horizontal direction multiplier */
  color-scheme: light;
}
[dir="rtl"] { --dx: -1; }

/* ---------- base ---------- */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--top-h) + 24px); }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
  background: var(--paper);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body.lang-en { font-size: 16px; line-height: 1.65; }
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--bg);
  pointer-events: none;
}
::selection { background: var(--sel); color: var(--ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
img, svg { max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent); }
h1, h2, h3, h4 { margin: 0; font-weight: 800; line-height: 1.35; letter-spacing: -.005em; text-wrap: balance; }
.lang-en h1, .lang-en h2, .lang-en h3 { letter-spacing: -.02em; line-height: 1.2; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }

.wrap { width: min(100% - 2 * var(--gut), var(--wrap)); margin-inline: auto; }
.mono { font-family: var(--mono); font-feature-settings: "zero"; letter-spacing: 0; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; inset-inline-start: 12px; top: -60px; z-index: 100; background: var(--ink); color: var(--paper); padding: 8px 14px; border-radius: 10px; }
.skip:focus { top: 12px; color: var(--paper); }

.ic { width: 20px; height: 20px; flex: none; }
[dir="rtl"] .flip { transform: scaleX(-1); }

/* ---------- tones ---------- */

.tone-led   { --t: var(--led);       --t-ink: #1c7f47;           --t-bg: var(--tint-led); }
.tone-coral { --t: var(--accent-2);  --t-ink: var(--coral-deep); --t-bg: var(--tint-2); }
.tone-teal  { --t: var(--accent);    --t-ink: var(--accent);     --t-bg: var(--tint); }
.tone-blue  { --t: var(--blue);      --t-ink: var(--blue-deep);  --t-bg: var(--tint-3); }
.tone-ink   { --t: #71858a;          --t-ink: var(--ink-2);      --t-bg: #edf1f0; }

.tile {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border-radius: 11px;
  background: var(--t-bg, var(--tint));
  color: var(--t-ink, var(--accent));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--t, var(--accent)) 14%, transparent);
}
.tile .ic { width: 20px; height: 20px; }

.led {
  display: inline-block;
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 50%;
  background: var(--t, var(--led));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--t, var(--led)) 18%, transparent);
}
.led-coral { --t: var(--accent-2); animation: pulse 2.2s var(--ease) infinite; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-2) 28%, transparent); }
  50%      { box-shadow: 0 0 0 7px color-mix(in srgb, var(--accent-2) 0%, transparent); }
}

.leds { display: inline-flex; gap: 6px; }
.leds i { width: 8px; height: 8px; border-radius: 50%; background: var(--rule); }
.leds i.g { background: var(--led); }
.leds i.a { background: var(--accent-2); }
.leds i.b { background: var(--accent); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: .82rem;
  font-weight: 700;
  color: var(--ink-2);
}
.eyebrow .ic { width: 16px; height: 16px; color: var(--accent); }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: var(--r-sm);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  font-size: .95rem;
  white-space: nowrap;
  box-shadow: 0 10px 24px -12px color-mix(in srgb, var(--accent) 80%, transparent);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .2s;
}
.btn:hover { color: var(--accent-ink); transform: translateY(-1px); box-shadow: 0 14px 28px -12px color-mix(in srgb, var(--accent) 90%, transparent); }
.btn:active { transform: translateY(0); }
.btn .ic { width: 18px; height: 18px; }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: .88rem; }
.btn-block { width: 100%; }
.btn-coral { background: var(--coral-deep); box-shadow: 0 10px 24px -12px color-mix(in srgb, var(--coral-deep) 80%, transparent); }
.btn-coral:hover { box-shadow: 0 14px 28px -12px color-mix(in srgb, var(--coral-deep) 90%, transparent); }

.link-btn, .btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 20px;
  border-radius: var(--r-sm);
  background: var(--paper-2);
  border: 1px solid var(--rule);
  color: var(--ink);
  font-weight: 700;
  font-size: .95rem;
  white-space: nowrap;
  transition: border-color .2s, color .2s, transform .25s var(--ease);
}
.link-btn:hover, .btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.link-btn .ic { width: 18px; height: 18px; }
.btn-ghost-coral:hover { border-color: var(--accent-2); color: var(--coral-deep); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: .9rem;
  color: var(--accent);
}
.link-arrow .ic { width: 17px; height: 17px; transition: translate .25s var(--ease); }
.link-arrow:hover .ic { translate: calc(var(--dx) * 3px) 0; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 4px 12px;
  border-radius: 999px;
  background: var(--t-bg);
  color: var(--t-ink);
  font-size: .82rem;
  font-weight: 700;
}
.chip .ic { width: 16px; height: 16px; }
.chip:hover { color: var(--t-ink); box-shadow: inset 0 0 0 1px var(--t); }

/* ---------- header ---------- */

.top {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
}
.top.is-open { background: var(--paper-2); }
.top-row { display: flex; align-items: center; gap: 28px; height: var(--top-h); }

.brand { display: inline-flex; align-items: center; gap: 12px; flex: none; }
.brand:hover { color: var(--ink); }
.brand .mark { width: 38px; height: 38px; filter: drop-shadow(0 6px 10px color-mix(in srgb, var(--accent) 35%, transparent)); }
.brand-text { display: grid; line-height: 1.15; }
.brand-text b { font-size: 1.12rem; font-weight: 850; letter-spacing: -.01em; }
.brand-text small { font-size: .72rem; color: var(--ink-3); font-weight: 600; margin-top: 2px; }

.nav ul { display: flex; gap: 2px; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border-radius: 10px;
  color: var(--ink-2);
  font-weight: 600;
  font-size: .92rem;
  transition: background .2s, color .2s;
}
.nav-link:hover { background: color-mix(in srgb, var(--ink) 5%, transparent); color: var(--ink); }
.nav-link.on, .nav-link[aria-expanded="true"] { background: var(--tint); color: var(--accent); }
.nav-link .chev { width: 16px; height: 16px; transition: rotate .25s var(--ease); }
.nav-link[aria-expanded="true"] .chev { rotate: 180deg; }

.top-tools { display: flex; align-items: center; gap: 10px; margin-inline-start: auto; }
.lang {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  border: 1px solid var(--rule);
  background: var(--paper-2);
  font-size: .78rem;
  font-weight: 800;
  color: var(--ink-2);
}
.lang:hover { border-color: var(--accent); }
.sos {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 40px;
  padding: 0 14px;
  border-radius: 11px;
  border: 1px solid color-mix(in srgb, var(--accent-2) 35%, var(--rule));
  background: var(--paper-2);
  color: var(--coral-deep);
  font-size: .86rem;
  font-weight: 700;
  white-space: nowrap;
}
.sos:hover { color: var(--coral-deep); border-color: var(--accent-2); background: var(--tint-2); }
.burger { display: none; width: 42px; height: 42px; border-radius: 11px; border: 1px solid var(--rule); background: var(--paper-2); place-items: center; }

/* ---------- mega menu ---------- */

.mega {
  position: absolute;
  inset-inline: 0;
  top: 100%;
  background: var(--paper-2);
  border-bottom: 1px solid var(--rule);
  box-shadow: 0 30px 60px -30px rgba(27, 42, 46, .25);
  animation: drop .28s var(--ease);
}
@keyframes drop { from { opacity: 0; transform: translateY(-6px); } }
.mega-grid { display: grid; grid-template-columns: 290px 1fr; gap: 0; padding-block: 18px 22px; }
.mega-cats { padding-inline-end: 22px; border-inline-end: 1px solid var(--rule-2); display: grid; align-content: start; gap: 2px; }
.mega-intent { font-size: .7rem; font-weight: 700; color: var(--ink-3); margin: 12px 10px 4px; }
.mega-intent:first-child { margin-top: 0; }
.mega-cat {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 10px;
  border-radius: 12px;
  transition: background .18s;
}
.mega-cat .tile { width: 32px; height: 32px; border-radius: 9px; }
.mega-cat .tile .ic { width: 17px; height: 17px; }
.mega-cat-text { flex: 1; }
.mega-cat-text b { font-size: .92rem; font-weight: 700; }
.mega-cat .count { font-family: var(--mono); font-size: .75rem; color: var(--ink-3); }
.mega-cat:hover, .mega-cat.is-active { background: var(--t-bg); color: var(--ink); }
.mega-cat.is-active .count { color: var(--t-ink); }

.mega-panes { padding-inline-start: 30px; display: flex; flex-direction: column; min-height: 100%; }
.mega-pane-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; padding-bottom: 14px; border-bottom: 1px solid var(--rule-2); }
.mega-pane-head h2 { font-size: 1.15rem; }
.mega-pane-head p { color: var(--ink-2); font-size: .88rem; margin-top: 2px; max-width: 56ch; }
.mega-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2px 18px; padding-block: 12px; }
.mega-group { display: flex; align-items: center; gap: 10px; margin: 12px 12px -6px; font-size: .74rem; font-weight: 700; color: var(--ink-3); }
.mega-group::after { content: ""; flex: 1; height: 1px; background: var(--rule-2); }
.mega-group + .mega-list { padding-top: 8px; }
.mega-list a { display: grid; gap: 0; padding: 9px 12px; border-radius: 12px; transition: background .18s; }
.mega-list a b { font-size: .92rem; font-weight: 700; }
.mega-list a span { font-size: .8rem; color: var(--ink-2); line-height: 1.6; }
.mega-list a:hover { background: var(--paper); color: var(--ink); }
.mega-list a:hover b { color: var(--t-ink); }
.mega-foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--paper);
  font-size: .86rem;
  color: var(--ink-2);
}
.mega-foot a { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; color: var(--accent); }
.mega-foot .ic { width: 16px; height: 16px; }
.mega-foot .mega-all { margin-inline-start: auto; color: var(--ink); }

/* ---------- mobile sheet ---------- */

.sheet {
  position: fixed;
  inset: var(--top-h) 0 0;
  z-index: 49;
  background: var(--paper-2);
  overflow-y: auto;
  overscroll-behavior: contain;
  animation: drop .25s var(--ease);
}
.sheet-inner { padding: 16px var(--gut) 40px; display: grid; gap: 4px; }
.sheet-sos {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
  border-radius: 14px;
  background: var(--tint-2);
  color: var(--coral-deep);
  font-weight: 700;
}
.sheet-sos b { margin-inline-start: auto; font-family: var(--mono); }
.sheet-intent { font-size: .72rem; font-weight: 700; color: var(--ink-3); margin: 14px 4px 4px; }
.sheet-cat { border-radius: 14px; }
.sheet-cat summary { display: flex; align-items: center; gap: 12px; padding: 8px 6px; list-style: none; cursor: pointer; font-weight: 700; }
.sheet-cat summary::-webkit-details-marker { display: none; }
.sheet-cat summary .chev { margin-inline-start: auto; width: 18px; height: 18px; color: var(--ink-3); transition: rotate .2s; }
.sheet-cat[open] { background: var(--paper); }
.sheet-cat[open] summary .chev { rotate: 180deg; }
.sheet-cat ul { padding: 0 56px 10px 12px; display: grid; }
[dir="ltr"] .sheet-cat ul { padding: 0 12px 10px 56px; }
.sheet-cat li a { display: block; padding: 7px 0; color: var(--ink-2); font-size: .92rem; border-bottom: 1px solid var(--rule-2); }
.sheet-cat li:last-child a { border: 0; }
.sheet-all { color: var(--accent) !important; font-weight: 700; }
.sheet-links { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 12px; }
.sheet-links a { padding: 8px 14px; border-radius: 10px; border: 1px solid var(--rule); font-weight: 600; font-size: .9rem; }

/* ---------- sections ---------- */

.sec { padding-block: clamp(56px, 8vw, 104px); position: relative; }
.sec-tight { padding-block: clamp(32px, 5vw, 56px); }
.sec + .sec { border-top: 1px solid color-mix(in srgb, var(--rule) 60%, transparent); }
.sec-alt { background: color-mix(in srgb, var(--paper-2) 42%, transparent); }

.sec-head { display: grid; grid-template-columns: 64px 1fr; gap: 12px; margin-bottom: clamp(28px, 4vw, 44px); max-width: 820px; }
.sec-head h2, .split-h { font-size: clamp(1.6rem, 3vw, 2.25rem); }
.sec-no { color: var(--accent-2); font-size: .9rem; font-weight: 600; padding-top: .55em; }
.sec-note { color: var(--ink-3); margin-top: 8px; color: var(--ink-2); max-width: 62ch; }

.card { background: var(--paper-2); border: 1px solid var(--rule-2); border-radius: var(--r); box-shadow: var(--shadow); }

.split { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(28px, 5vw, 72px); align-items: start; }
.split .sec-no { padding-top: 0; margin-bottom: 10px; }
.split .sec-note { margin-block: 12px 20px; }

/* ---------- hero ---------- */

.hero { position: relative; padding-block: clamp(40px, 7vw, 88px) clamp(56px, 8vw, 104px); overflow: hidden; }
.hero::before, .hero::after {
  content: "";
  position: absolute;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
}
.hero::before { inset-inline-end: -140px; top: -180px; background: radial-gradient(circle, var(--blob-1), transparent 68%); }
.hero::after { inset-inline-start: -200px; bottom: -260px; background: radial-gradient(circle, var(--blob-2), transparent 68%); }
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: clamp(32px, 5vw, 72px); align-items: center; }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px 6px 14px;
  border-radius: 999px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  box-shadow: var(--shadow);
  color: var(--ink-2);
  font-size: .84rem;
  font-weight: 600;
}
.hero-title {
  display: grid;
  margin-block: 22px 18px;
  font-size: clamp(2.35rem, 5.4vw, 4.4rem);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.015em;
}
.lang-en .hero-title { letter-spacing: -.035em; line-height: 1.04; }
.hero-title .soft { color: var(--accent); }
.hero-title em { font-style: normal; color: var(--accent-2); }
.lede { font-size: clamp(1rem, 1.35vw, 1.12rem); color: var(--ink-2); max-width: 58ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-note { display: flex; align-items: center; gap: 8px; margin-top: 22px; font-size: .78rem; color: var(--ink-3); }
.lang-fa .hero-note { font-family: var(--sans); font-size: .84rem; }
.hero-note .ic { width: 16px; height: 16px; color: var(--led); }

/* the rack */
.rack {
  position: relative;
  background: var(--paper-2);
  border: 1px solid var(--rule-2);
  border-radius: 22px;
  box-shadow: var(--shadow-lg);
  padding: 10px;
}
.rack::before {
  /* rack rails */
  content: "";
  position: absolute;
  inset: 52px 10px 10px;
  border-inline: 14px solid color-mix(in srgb, var(--rule-2) 70%, transparent);
  border-radius: 14px;
  pointer-events: none;
}
.rack-head { display: flex; align-items: center; gap: 12px; padding: 8px 12px 14px; }
.rack-name { font-size: .74rem; font-weight: 700; color: var(--ink-2); }
.rack-meta { margin-inline-start: auto; font-size: .72rem; color: var(--ink-3); }
.lang-fa .rack-meta { font-family: var(--sans); }
.rack-units { display: grid; gap: 6px; position: relative; }
.unit {
  display: grid;
  grid-template-columns: 10px 34px 34px 1fr auto 10px 10px;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: 12px;
  background: linear-gradient(to bottom, #fff, #fbfdfc);
  border: 1px solid var(--rule-2);
  box-shadow: 0 1px 0 rgba(27, 42, 46, .03);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .25s;
}
.unit .screw { width: 8px; height: 8px; border-radius: 50%; background: radial-gradient(circle at 35% 35%, #fff, #cfd9d7); box-shadow: inset 0 0 0 1px #c9d4d2; }
.unit .u { font-size: .7rem; color: var(--ink-3); }
.unit .tile { width: 34px; height: 34px; border-radius: 10px; }
.unit .tile .ic { width: 18px; height: 18px; }
.unit-text { display: grid; line-height: 1.35; min-width: 0; }
.unit-text b { font-size: .95rem; font-weight: 750; }
.unit-text small { font-size: .74rem; color: var(--ink-3); }
.unit-count {
  min-width: 30px;
  padding: 2px 8px;
  border-radius: 8px;
  background: var(--paper);
  font-size: .74rem;
  text-align: center;
  color: var(--ink-2);
}
.unit .led { width: 7px; height: 7px; box-shadow: 0 0 0 3px color-mix(in srgb, var(--t) 20%, transparent); }
.unit:hover {
  color: var(--ink);
  transform: translateX(calc(var(--dx) * -10px));
  border-color: color-mix(in srgb, var(--t) 45%, var(--rule));
  box-shadow: calc(var(--dx) * 10px) 14px 28px -18px rgba(27, 42, 46, .35);
}
.unit:hover .led { animation: blink .9s steps(2) infinite; }
@keyframes blink { 50% { opacity: .25; } }

/* ---------- start paths ---------- */

.paths { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.path {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px;
  border-radius: var(--r);
  background: var(--paper-2);
  border: 1px solid var(--rule-2);
  box-shadow: var(--shadow);
  transition: transform .3s var(--ease), border-color .25s, box-shadow .3s;
  position: relative;
  overflow: hidden;
}
.path::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 3px;
  background: var(--t);
  transform: scaleX(0);
  transform-origin: var(--origin, right);
  transition: transform .4s var(--ease);
}
[dir="ltr"] .path::after { --origin: left; }
.path q { quotes: "«" "»"; font-size: 1.04rem; font-weight: 600; line-height: 1.75; color: var(--ink); flex: 1; }
.lang-en .path q { quotes: "\201C" "\201D"; line-height: 1.5; }
.path-to { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: .88rem; color: var(--t-ink); }
.path-to .ic { width: 16px; height: 16px; transition: translate .25s var(--ease); }
.path:hover { color: inherit; transform: translateY(-3px); border-color: color-mix(in srgb, var(--t) 35%, var(--rule)); box-shadow: var(--shadow-lg); }
.path:hover::after { transform: scaleX(1); }
.path:hover .path-to .ic { translate: calc(var(--dx) * 4px) 0; }

/* ---------- tabs ---------- */

.tabbar-wrap {
  position: sticky;
  top: var(--top-h);
  z-index: 5;
  margin-inline: calc(-1 * var(--gut));
  padding: 10px var(--gut);
  background: linear-gradient(to bottom, color-mix(in srgb, var(--paper) 96%, transparent) 70%, transparent);
}
.tabbar {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
  padding: 4px;
  border-radius: 16px;
  background: color-mix(in srgb, var(--ink) 4%, transparent);
}
.tabbar::-webkit-scrollbar { display: none; }
.tab {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px 7px 10px;
  border-radius: 12px;
  white-space: nowrap;
  scroll-snap-align: start;
  font-weight: 700;
  font-size: .9rem;
  color: var(--ink-2);
  transition: background .2s, color .2s, box-shadow .2s;
}
[dir="rtl"] .tab { padding: 7px 10px 7px 14px; }
.tab .tile { width: 28px; height: 28px; border-radius: 8px; }
.tab .tile .ic { width: 16px; height: 16px; }
.tab .count { font-size: .72rem; color: var(--ink-3); }
.tab:hover { color: var(--ink); background: color-mix(in srgb, var(--paper-2) 60%, transparent); }
.tab[aria-selected="true"] { background: var(--paper-2); color: var(--ink); box-shadow: 0 1px 2px rgba(27, 42, 46, .08), 0 6px 16px -10px rgba(27, 42, 46, .3); }
.tab[aria-selected="true"] .count { color: var(--t-ink); }

/* Wide screens: all eight tabs visible as a 4×2 grid, in the same order as the intents. */
@media (min-width: 1100px) {
  .tabbar-wrap { position: static; margin-inline: 0; padding: 0; background: none; }
  .tabbar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; overflow: visible; padding: 6px; }
  .tab { padding: 9px 12px; }
  [dir="rtl"] .tab { padding: 9px 12px; }
  .tab .count { margin-inline-start: auto; }
}

.pane {
  margin-top: 18px;
  padding: clamp(20px, 3vw, 32px);
  background: var(--paper-2);
  border: 1px solid var(--rule-2);
  border-radius: 22px;
  box-shadow: var(--shadow);
  animation: fade .35s var(--ease);
}
@keyframes fade { from { opacity: 0; transform: translateY(6px); } }
.pane-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; padding-bottom: 20px; margin-bottom: 8px; border-bottom: 1px solid var(--rule-2); }
.pane-intent { font-size: .72rem; color: var(--t-ink); font-weight: 600; }
.lang-fa .pane-intent { font-family: var(--sans); font-weight: 700; }
.pane-head h3 { font-size: clamp(1.3rem, 2.2vw, 1.6rem); margin-block: 2px 4px; }
.pane-head p { color: var(--ink-2); max-width: 60ch; }
.pane-actions { display: flex; gap: 10px; flex: none; }
.pane-actions .link-btn { min-height: 40px; font-size: .88rem; }
.pane-group { margin: 22px 4px 6px; font-size: .8rem; font-weight: 700; color: var(--ink-3); display: flex; align-items: center; gap: 12px; }
.pane-group::after { content: ""; flex: 1; height: 1px; background: var(--rule-2); }

.svc-list { display: grid; grid-template-columns: repeat(2, 1fr); column-gap: 28px; }
.svc {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 12px;
  margin-inline: -12px;
  border-radius: 14px;
  border-bottom: 1px solid var(--rule-2);
  transition: background .2s;
}
.svc-list li:nth-last-child(-n+2) .svc { border-bottom-color: transparent; }
.svc-text { flex: 1; display: grid; }
.svc-text b { font-weight: 700; font-size: .98rem; }
.svc-text span { font-size: .85rem; color: var(--ink-2); line-height: 1.65; }
.svc-arrow { width: 18px; height: 18px; color: var(--ink-3); transition: translate .25s var(--ease), color .2s; }
.svc:hover { background: var(--t-bg); color: var(--ink); border-bottom-color: transparent; }
.svc:hover b { color: var(--t-ink); }
.svc:hover .svc-arrow { color: var(--t-ink); translate: calc(var(--dx) * 4px) 0; }

/* ---------- flow ---------- */

.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: flow; position: relative; }
.flow li { position: relative; padding-top: 34px; }
.flow li::before {
  content: "";
  position: absolute;
  top: 9px;
  inset-inline: 0 -20px;
  height: 1px;
  background: linear-gradient(to var(--flow-dir, left), var(--rule) 60%, transparent);
}
[dir="ltr"] .flow li::before { --flow-dir: right; }
.flow li:last-child::before { inset-inline-end: 40%; }
.flow li::after {
  content: "";
  position: absolute;
  top: 3px;
  inset-inline-start: 0;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--ink-3);
}
.flow li:first-child::after { border-color: var(--accent); box-shadow: 0 0 0 5px var(--tint); }
.flow-no { font-size: .8rem; color: var(--accent-2); }
.flow h3 { font-size: 1.08rem; margin-block: 4px 6px; }
.flow p { color: var(--ink-2); font-size: .92rem; }

/* ---------- plate / spec sheet ---------- */

.plate { background: var(--paper-2); border: 1px solid var(--rule-2); border-radius: var(--r); box-shadow: var(--shadow-lg); overflow: hidden; }
.plate-head { display: flex; align-items: center; gap: 12px; padding: 14px 20px; border-bottom: 1px solid var(--rule-2); }
.plate-head b { font-size: .95rem; }
.plate-head .mono { margin-inline-start: auto; font-size: .72rem; color: var(--ink-3); }
.spec .row { display: grid; grid-template-columns: 44px 1fr; gap: 10px; padding: 16px 20px; border-bottom: 1px solid var(--rule-2); }
.spec .row:last-child { border-bottom: 0; }
.spec dt { color: var(--ink-3); font-size: .78rem; padding-top: .3em; }
.spec dd { margin: 0; display: grid; }
.spec dd b { font-weight: 750; }
.spec dd span { color: var(--ink-2); font-size: .92rem; }

/* ---------- stack ---------- */

.stack { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.stack section { background: var(--paper-2); border: 1px solid var(--rule-2); border-radius: var(--r); box-shadow: var(--shadow); padding: 20px; transition: box-shadow .3s; }
.stack section:hover { box-shadow: var(--shadow-lg); }
.stack h3 { display: flex; align-items: center; gap: 10px; font-size: 1rem; margin-bottom: 14px; }
.stack h3::before { content: ""; width: 26px; height: 26px; border-radius: 8px; background: var(--tint) radial-gradient(circle, var(--accent) 0 4px, transparent 4.5px); }
.stack section:nth-child(3n+2) h3::before { background: var(--tint-2) radial-gradient(circle, var(--accent-2) 0 4px, transparent 4.5px); }
.stack section:nth-child(3n) h3::before { background: var(--tint-3) radial-gradient(circle, var(--blue) 0 4px, transparent 4.5px); }
.stack ul { display: flex; flex-wrap: wrap; gap: 6px; }
.stack li, .tech li {
  padding: 3px 10px;
  border-radius: 8px;
  background: var(--paper);
  border: 1px solid var(--rule-2);
  font-family: var(--mono);
  font-size: .76rem;
  color: var(--ink-2);
  direction: ltr;
}

/* ---------- faq ---------- */

.faq details { border-bottom: 1px solid var(--rule); }
.faq details:first-child { border-top: 1px solid var(--rule); }
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 2px;
  font-weight: 700;
  font-size: 1.02rem;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .ic { width: 18px; height: 18px; color: var(--accent); transition: rotate .3s var(--ease); flex: none; }
.faq details[open] summary .ic { rotate: 45deg; }
.faq summary:hover { color: var(--accent); }
.faq details p { color: var(--ink-2); padding: 0 2px 20px; max-width: 70ch; }

/* ---------- request form ---------- */

.req {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(24px, 4vw, 56px);
  padding: clamp(22px, 4vw, 44px);
  border-radius: 26px;
  background: linear-gradient(150deg, var(--tint), var(--paper-2) 62%);
  border: 1px solid var(--rule-2);
  box-shadow: var(--shadow);
}
.req-emergency { background: linear-gradient(150deg, var(--tint-2), var(--paper-2) 62%); }
.req-emergency .eyebrow .ic { color: var(--coral-deep); }
.req-side h2 { font-size: clamp(1.45rem, 2.6vw, 2rem); margin-block: 10px 10px; }
.req-lede { color: var(--ink-2); }
.req-phone {
  display: grid;
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 16px;
  background: var(--paper-2);
  border: 1px solid color-mix(in srgb, var(--accent-2) 30%, var(--rule));
}
.req-phone span { font-size: .82rem; color: var(--ink-2); }
.req-phone b { font-family: var(--mono); font-size: 1.5rem; color: var(--coral-deep); text-align: start; }
.req-next { margin-top: 26px; display: grid; gap: 10px; }
.req-next li { display: grid; grid-template-columns: 34px 1fr; font-size: .92rem; color: var(--ink-2); }
.req-next .mono { color: var(--accent-2); font-size: .8rem; padding-top: .25em; }

.form { background: var(--paper-2); border: 1px solid var(--rule-2); border-radius: 20px; padding: clamp(18px, 3vw, 28px); display: grid; gap: 14px; box-shadow: var(--shadow-lg); align-self: start; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field { display: grid; gap: 6px; }
.field > span { font-size: .84rem; font-weight: 600; color: var(--ink-2); }
.field em { font-style: normal; color: var(--accent-2); }
.field input, .field select, .field textarea {
  width: 100%;
  min-height: 48px;
  padding: 11px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  transition: border-color .2s, background .2s, box-shadow .2s;
  appearance: none;
}
.field textarea { resize: vertical; min-height: 110px; line-height: 1.8; }
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' fill='none' stroke='%234c5b60' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 7 4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: left 12px center;
  padding-inline-end: 38px;
}
[dir="ltr"] .field select { background-position: right 12px center; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background-color: var(--paper-2);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 15%, transparent);
}
.field input[aria-invalid="true"] { border-color: var(--accent-2); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent-2) 14%, transparent); }
.hp { position: absolute; inset-inline-start: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; margin-top: 4px; }
.form-note { display: inline-flex; align-items: center; gap: 6px; font-size: .78rem; color: var(--ink-3); }
.form-note .ic { width: 14px; height: 14px; }
.form-msg { font-size: .92rem; font-weight: 600; color: var(--ink-2); min-height: 0; }
.form-msg:empty { display: none; }
.form-msg.ok { color: #1c7f47; padding: 12px 14px; border-radius: 12px; background: var(--tint-led); }
.form-msg.err { color: var(--coral-deep); padding: 12px 14px; border-radius: 12px; background: var(--tint-2); }
.form.is-sending button[type="submit"] { opacity: .65; pointer-events: none; }

/* ---------- page heads ---------- */

.page-head { padding-block: clamp(28px, 5vw, 56px) clamp(28px, 4vw, 44px); position: relative; }
.page-head h1 { font-size: clamp(2rem, 4.2vw, 3.1rem); font-weight: 900; margin-block: 14px 12px; max-width: 22ch; }
.lang-en .page-head h1 { max-width: 26ch; }
.crumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; font-size: .8rem; color: var(--ink-3); }
.crumbs li { display: inline-flex; align-items: center; gap: 4px; }
.crumbs li + li::before { content: "/"; opacity: .6; margin-inline: 4px; }
.crumbs a { color: var(--ink-2); }
.crumbs a:hover { color: var(--accent); }
.crumbs [aria-current] { color: var(--ink-3); }

.finder {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 560px;
  margin-top: 26px;
  padding: 0 16px;
  min-height: 54px;
  border-radius: 16px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  box-shadow: var(--shadow);
  transition: border-color .2s, box-shadow .2s;
}
.finder:focus-within { border-color: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 15%, transparent), var(--shadow); }
.finder .ic { color: var(--ink-3); }
.finder input { flex: 1; border: 0; background: none; outline: none; min-height: 52px; }
.finder kbd { font-size: .72rem; padding: 2px 7px; border-radius: 6px; border: 1px solid var(--rule); color: var(--ink-3); }

/* services hub */
.hub { display: grid; gap: 34px; }
.hub-intent { display: grid; grid-template-columns: 150px 1fr; gap: 24px; }
.hub-intent-label { font-size: .8rem; color: var(--ink-3); padding-top: 22px; }
.lang-fa .hub-intent-label { font-family: var(--sans); font-weight: 700; }
.hub-cats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.hub-intent:not(:last-of-type) .hub-cats:has(> :only-child) { grid-template-columns: 1fr; }
.hub-cat { padding: 22px; }
.hub-cat > header { display: flex; gap: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--rule-2); margin-bottom: 6px; }
.hub-cat h2 { font-size: 1.15rem; }
.hub-cat h2 a:hover { color: var(--t-ink); }
.hub-cat header p { font-size: .86rem; color: var(--ink-2); line-height: 1.7; }
.hub-cat ul { display: grid; }
.hub-cats:has(> :only-child) .hub-cat ul { grid-template-columns: repeat(2, 1fr); column-gap: 24px; }
.hub-cat li a { display: grid; padding: 9px 10px; margin-inline: -10px; border-radius: 12px; }
.hub-cat li a b { font-size: .93rem; font-weight: 700; }
.hub-cat li a span { font-size: .8rem; color: var(--ink-2); line-height: 1.6; }
.hub-cat li a:hover { background: var(--t-bg); color: var(--ink); }
.hub-cat li a:hover b { color: var(--t-ink); }
.finder-empty { padding: 20px; border-radius: 16px; background: var(--paper-2); border: 1px dashed var(--rule); text-align: center; color: var(--ink-2); }
.finder-empty a { color: var(--accent); font-weight: 700; }

/* category page */
.cat-head-grid { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; }
.cat-eyebrow { display: flex; align-items: center; gap: 12px; margin-top: 18px; font-size: .78rem; color: var(--t-ink); }
.cat-eyebrow bdi + span { padding-inline-start: 12px; border-inline-start: 1px solid var(--rule); color: var(--ink-3); }
.lang-fa .cat-eyebrow bdi + span { font-family: var(--sans); font-weight: 600; }
.cat-mark { position: relative; width: 210px; height: 210px; display: grid; place-items: center; }
.cat-mark::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 40px;
  background:
    repeating-linear-gradient(to bottom, transparent 0 25px, color-mix(in srgb, var(--t) 12%, transparent) 25px 26px),
    radial-gradient(circle at 50% 50%, var(--t-bg), transparent 70%);
  -webkit-mask: radial-gradient(circle, #000 45%, transparent 72%);
          mask: radial-gradient(circle, #000 45%, transparent 72%);
}
.tile-xl { width: 96px; height: 96px; border-radius: 28px; position: relative; box-shadow: var(--shadow-lg), inset 0 0 0 1px color-mix(in srgb, var(--t) 18%, transparent); }
.tile-xl .ic { width: 44px; height: 44px; stroke-width: 1.3; }

.cat-layout { display: grid; grid-template-columns: 1fr 260px; gap: clamp(28px, 5vw, 64px); align-items: start; }
.group-h { font-size: .9rem; color: var(--ink-3); font-weight: 700; margin: 28px 0 6px; display: flex; gap: 12px; align-items: center; }
.group-h:first-child { margin-top: 0; }
.group-h::after { content: ""; flex: 1; height: 1px; background: var(--rule); }
.rows { counter-reset: none; }
.row-card { display: grid; grid-template-columns: 48px 1fr 48px; gap: 16px; padding: 24px 0; border-bottom: 1px solid var(--rule); }
.row-no { color: var(--accent-2); font-size: .82rem; padding-top: .45em; }
.row-body h3 { font-size: 1.25rem; }
.row-body h3 a:hover { color: var(--accent); }
.row-body > p { color: var(--ink-2); margin-top: 6px; max-width: 70ch; }
.row-signals { display: flex; flex-wrap: wrap; gap: 6px 8px; margin-top: 12px; }
.row-signals li { font-size: .8rem; color: var(--ink-2); padding: 3px 10px; border-radius: 8px; background: var(--paper-2); border: 1px solid var(--rule-2); }
.row-go { align-self: center; display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--rule); background: var(--paper-2); color: var(--ink-2); transition: all .25s var(--ease); }
.row-card:hover .row-go { background: var(--accent); border-color: var(--accent); color: #fff; }

.aside-sticky { position: sticky; top: calc(var(--top-h) + 24px); }
.aside-h { font-size: .74rem; color: var(--ink-3); margin-bottom: 10px; }
.lang-fa .aside-h { font-family: var(--sans); font-weight: 700; }
.mini-rack { display: grid; gap: 4px; padding: 8px; border-radius: 16px; background: var(--paper-2); border: 1px solid var(--rule-2); box-shadow: var(--shadow); }
.mini-rack a { display: grid; grid-template-columns: 30px 1fr 8px; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 10px; font-size: .88rem; font-weight: 600; color: var(--ink-2); }
.mini-rack .u { font-size: .7rem; color: var(--ink-3); }
.mini-rack .led { width: 6px; height: 6px; box-shadow: none; opacity: .5; }
.mini-rack a:hover { background: var(--paper); color: var(--ink); }
.mini-rack a.on { background: var(--t-bg); color: var(--ink); }
.mini-rack a.on .led { opacity: 1; box-shadow: 0 0 0 3px color-mix(in srgb, var(--t) 22%, transparent); }
.aside-sos { display: flex; align-items: center; gap: 10px; margin-top: 12px; padding: 12px 14px; border-radius: 14px; background: var(--tint-2); color: var(--coral-deep); font-weight: 700; font-size: .9rem; }
.aside-sos .ic { margin-inline-start: auto; width: 16px; height: 16px; }
.aside-sos:hover { color: var(--coral-deep); }

/* service page */
.svc-head-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: clamp(28px, 5vw, 64px); align-items: end; margin-top: 18px; }
.svc-head .chip { margin-top: 4px; }
.svc-head h1 { max-width: 20ch; }
.svc-plate .tech { display: flex; flex-wrap: wrap; gap: 6px; padding: 18px 20px; }
.plate-foot { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 0 12px 12px; }
.plate-foot div { display: grid; padding: 10px 12px; border-radius: 12px; background: var(--tint); }
.plate-foot div:nth-child(2) { background: var(--tint-2); }
.plate-foot div:nth-child(3) { background: var(--tint-3); }
.plate-foot b { font-size: 1.3rem; line-height: 1.2; color: var(--accent); }
.plate-foot div:nth-child(2) b { color: var(--coral-deep); }
.plate-foot div:nth-child(3) b { color: var(--blue-deep); }
.plate-foot small { font-size: .74rem; color: var(--ink-2); }

.svc-layout { display: grid; grid-template-columns: 220px minmax(0, 780px); gap: clamp(28px, 6vw, 88px); padding-block: 24px 72px; }
.svc-toc ol { display: grid; gap: 2px; border-inline-start: 1px solid var(--rule); }
.svc-toc a { display: block; padding: 6px 14px; margin-inline-start: -1px; border-inline-start: 2px solid transparent; font-size: .88rem; color: var(--ink-2); transition: color .2s, border-color .2s; }
.svc-toc a:hover { color: var(--ink); }
.svc-toc a.on { color: var(--accent); border-inline-start-color: var(--accent); font-weight: 700; }

.block { padding-block: 26px 34px; border-bottom: 1px solid var(--rule); }
.block:last-child { border-bottom: 0; }
.block > h2 { font-size: clamp(1.3rem, 2.2vw, 1.6rem); margin-bottom: 18px; }

.signals { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.signals li { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border-radius: 14px; background: var(--paper-2); border: 1px solid var(--rule-2); font-size: .95rem; }
.signals .ic { width: 18px; height: 18px; margin-top: .3em; color: var(--led); flex: none; }

.scope { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.scope-item { padding: 20px; box-shadow: none; transition: box-shadow .3s, border-color .3s; }
.scope-item:hover { box-shadow: var(--shadow); border-color: var(--rule); }
.scope-no { font-size: .76rem; color: var(--accent-2); }
.scope-item h3 { font-size: 1.02rem; margin-block: 4px 6px; }
.scope-item p { color: var(--ink-2); font-size: .92rem; }

.deliver { display: grid; gap: 0; background: var(--paper-2); border: 1px solid var(--rule-2); border-radius: var(--r); overflow: hidden; }
.deliver li { display: flex; align-items: flex-start; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--rule-2); }
.deliver li:last-child { border-bottom: 0; }
.deliver .ic { width: 18px; height: 18px; color: var(--accent); margin-top: .3em; }

.log { position: relative; display: grid; gap: 14px; padding-inline-start: 36px; }
.log::before { content: ""; position: absolute; inset-inline-start: 7px; top: 10px; bottom: 10px; width: 2px; border-radius: 2px; background: linear-gradient(to bottom, var(--accent), var(--rule) 30%, var(--rule)); }
.log li { position: relative; display: grid; grid-template-columns: 34px 1fr; gap: 8px; padding: 16px 18px; background: var(--paper-2); border: 1px solid var(--rule-2); border-radius: var(--r); }
.log li::before { content: ""; position: absolute; inset-inline-start: -36px; top: 22px; width: 16px; height: 16px; border-radius: 50%; background: var(--paper); border: 3px solid var(--ink-3); box-sizing: border-box; }
.log li.current::before { border-color: var(--accent); box-shadow: 0 0 0 5px var(--tint); }
.log-no { color: var(--accent-2); font-size: .8rem; padding-top: .35em; }
.log h3 { font-size: 1rem; }
.log p { color: var(--ink-2); font-size: .92rem; }

.block-kw { padding-block: 20px; }
.kw { display: flex; flex-wrap: wrap; gap: 6px; }
.kw li { font-size: .78rem; color: var(--ink-2); padding: 2px 10px; border-radius: 999px; background: var(--tint-3); }

.rel-h { font-size: 1.3rem; margin-bottom: 16px; }
.related { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.rel { position: relative; display: grid; gap: 4px; padding: 20px 20px 20px; height: 100%; transition: transform .3s var(--ease), box-shadow .3s; }
.rel-cat { font-size: .72rem; color: var(--t-ink); }
.lang-fa .rel-cat { font-family: var(--sans); font-weight: 700; }
.rel b { font-size: 1.02rem; padding-inline-end: 28px; }
.rel > span:not(.rel-cat) { font-size: .86rem; color: var(--ink-2); }
.rel-arrow { position: absolute; inset-inline-end: 18px; top: 22px; width: 18px; height: 18px; color: var(--ink-3); }
.rel:hover { color: inherit; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.rel:hover .rel-arrow { color: var(--t-ink); }

/* contact */
.contact-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 16px; align-items: stretch; }
.contact-sos { display: grid; align-content: space-between; gap: 18px; padding: 26px; background: linear-gradient(150deg, var(--tint-2), var(--paper-2) 70%); }
.contact-sos b { font-family: var(--mono); font-size: clamp(1.6rem, 3vw, 2.3rem); color: var(--coral-deep); text-align: start; }
.contact-sos > span { color: var(--ink-2); font-size: .9rem; }
.contact-sos:hover { color: inherit; box-shadow: var(--shadow-lg); }
.channels { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.channels li > a, .channels li > div { display: flex; align-items: center; gap: 12px; padding: 14px 16px; height: 100%; border-radius: 16px; background: var(--paper-2); border: 1px solid var(--rule-2); }
.channels li > a:hover { border-color: var(--accent); color: inherit; }
.channels small { display: block; font-size: .76rem; color: var(--ink-3); line-height: 1.4; }
.channels b { font-size: .95rem; font-weight: 700; }
.channels span:not(.tile) { display: grid; text-align: start; }

/* prose (about, WP pages) */
.prose p { color: var(--ink-2); font-size: 1.04rem; margin-bottom: 1.1em; }
.prose p:first-child { color: var(--ink); font-size: 1.14rem; }
.prose-page { max-width: 760px; }
.prose-page h2, .prose-page h3 { margin: 1.6em 0 .6em; }
.prose-page a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.post-list { display: grid; gap: 12px; }
.post-list a { display: grid; padding: 18px 20px; }

/* 404 */
.nf { padding-block: clamp(64px, 12vw, 140px); text-align: center; }
.nf .lede { margin-inline: auto; }
.nf .hero-cta { justify-content: center; }
.nf-code { font-size: clamp(4rem, 12vw, 8rem); font-weight: 800; line-height: 1; color: var(--accent); }
.nf-code span { color: var(--accent-2); }
.nf h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-block: 18px 10px; }

/* ---------- footer ---------- */

.foot { padding-block: 56px 28px; border-top: 1px solid var(--rule-2); background: color-mix(in srgb, var(--paper-2) 55%, transparent); }
.foot-sos {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 26px;
  margin-bottom: 48px;
  border-radius: 20px;
  background: linear-gradient(120deg, var(--tint-2), var(--paper-2) 75%);
  border: 1px solid color-mix(in srgb, var(--accent-2) 22%, var(--rule-2));
}
.foot-sos .eyebrow { color: var(--coral-deep); }
.foot-sos-title { font-size: clamp(1.05rem, 2vw, 1.3rem); font-weight: 750; margin-top: 4px; }
.foot-sos-phone { display: inline-flex; align-items: center; gap: 12px; font-family: var(--mono); font-size: clamp(1.2rem, 2.4vw, 1.6rem); font-weight: 600; color: var(--coral-deep); white-space: nowrap; }
.foot-sos-phone:hover { color: var(--coral-deep); }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr .9fr; gap: 32px; }
.foot-brand > p { color: var(--ink-2); font-size: .9rem; margin-block: 14px 16px; max-width: 42ch; }
.foot-contact { display: grid; gap: 8px; font-size: .88rem; color: var(--ink-2); }
.foot-contact li { display: flex; align-items: center; gap: 10px; }
.foot-contact .ic { width: 16px; height: 16px; color: var(--ink-3); }
.foot-h { font-size: .92rem; font-weight: 700; margin-bottom: 10px; }
.foot-col .foot-h a:hover { color: var(--accent); }
.foot-col ul { display: grid; gap: 6px; }
.foot-col li a { font-size: .9rem; color: var(--ink-2); }
.foot-col li a:hover { color: var(--accent); }
.foot-bar { display: flex; justify-content: space-between; gap: 16px; margin-top: 44px; padding-top: 20px; border-top: 1px solid var(--rule-2); font-size: .8rem; color: var(--ink-3); }

/* ---------- reveal on scroll ---------- */

@media (prefers-reduced-motion: no-preference) {
  .js [data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
  .js [data-reveal].is-in { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ---------- responsive ---------- */

@media (max-width: 1160px) {
  .nav, .top-cta { display: none; }
  .burger { display: grid; }
  .paths { grid-template-columns: repeat(2, 1fr); }
  .stack { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr 1fr; }
  .foot-brand { grid-column: 1 / -1; }
}

@media (max-width: 960px) {
  .hero-grid, .split, .req, .svc-head-grid, .contact-grid { grid-template-columns: 1fr; }
  .cat-layout { grid-template-columns: 1fr; }
  .cat-aside { display: none; }
  .cat-mark { display: none; }
  .cat-head-grid { grid-template-columns: 1fr; }
  .svc-layout { grid-template-columns: minmax(0, 1fr); padding-top: 0; }
  .svc-toc { display: none; }
  .flow { grid-template-columns: repeat(2, 1fr); row-gap: 28px; }
  .flow li::before { display: none; }
  .hub-intent { grid-template-columns: 1fr; gap: 10px; }
  .hub-intent-label { padding-top: 0; }
  .related { grid-template-columns: 1fr 1fr; }
  .pane-head { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 680px) {
  :root { --top-h: 64px; }
  body { font-size: 15px; }
  .brand-text small, .sos span { display: none; }
  .sos { width: 40px; padding: 0; justify-content: center; }
  .paths, .stack, .svc-list, .signals, .scope, .form-row, .related, .channels, .hub-cats, .flow { grid-template-columns: 1fr; }
  .hub-cats:has(> :only-child) .hub-cat ul { grid-template-columns: 1fr; }
  .svc-list li:nth-last-child(2) .svc { border-bottom-color: var(--rule-2); }
  .sec-head { grid-template-columns: 1fr; gap: 4px; }
  .sec-no { padding-top: 0; }
  .unit { grid-template-columns: 30px 30px 1fr auto 8px; gap: 10px; padding: 8px 10px; }
  .unit .screw { display: none; }
  .rack::before { display: none; }
  .row-card { grid-template-columns: 34px 1fr; }
  .path { padding: 18px; gap: 12px; }
  .path q { font-size: .98rem; }
  .sec { padding-block: 48px; }
  .row-go { display: none; }
  .foot-sos { flex-direction: column; align-items: flex-start; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .foot-bar { flex-direction: column; }
  .hero-cta > * { flex: 1 1 auto; }
  .pane-actions { width: 100%; }
  .pane-actions > * { flex: 1; justify-content: center; }
  .mega { display: none !important; }
}

/* =====================================================================
   Blog
   ===================================================================== */

.blog-cats { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.blog-cats a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--rule);
  background: var(--paper-2);
  font-size: .88rem;
  font-weight: 700;
  color: var(--ink-2);
}
.blog-cats a .mono { font-size: .72rem; color: var(--ink-3); }
.blog-cats a:hover { border-color: var(--accent); color: var(--accent); }
.blog-cats a.on { background: var(--tint); border-color: transparent; color: var(--accent); }

.posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.post-lead { grid-column: 1 / -1; }
.post-card { height: 100%; transition: transform .3s var(--ease), box-shadow .3s; }
.post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.post-link { position: relative; display: flex; flex-direction: column; gap: 10px; height: 100%; padding: 24px; }
.post-link:hover { color: inherit; }
.post-cat { align-self: flex-start; font-size: .76rem; font-weight: 700; color: var(--accent); background: var(--tint); padding: 2px 10px; border-radius: 999px; }
.post-link h2 { font-size: 1.14rem; line-height: 1.6; padding-inline-end: 24px; }
.post-link:hover h2 { color: var(--accent); }
.post-link p { color: var(--ink-2); font-size: .92rem; flex: 1; }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; font-size: .8rem; color: var(--ink-3); }
.post-meta > * + *::before { content: "·"; margin-inline-end: 14px; opacity: .6; }
.post-meta .chip + *::before { content: none; }
.post-arrow { position: absolute; inset-inline-end: 20px; top: 26px; width: 18px; height: 18px; color: var(--ink-3); }
.post-lead .post-link { padding: clamp(24px, 4vw, 40px); background: linear-gradient(140deg, var(--tint), var(--paper-2) 60%); border-radius: var(--r); }
.post-lead h2 { font-size: clamp(1.35rem, 2.6vw, 1.9rem); max-width: 30ch; }
.post-lead p { font-size: 1rem; max-width: 70ch; }

.pager { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px; margin-top: 32px; }
.pager .page-numbers { display: grid; place-items: center; min-width: 42px; height: 42px; padding: 0 12px; border-radius: 12px; border: 1px solid var(--rule); background: var(--paper-2); font-weight: 700; color: var(--ink-2); }
.pager .page-numbers.current { background: var(--accent); border-color: var(--accent); color: #fff; }
.pager a.page-numbers:hover { border-color: var(--accent); color: var(--accent); }

.post-head h1 { max-width: 28ch; font-size: clamp(1.8rem, 3.8vw, 2.7rem); line-height: 1.45; }
.post-head .post-meta { margin-top: 18px; }
.post-layout { grid-template-columns: 240px minmax(0, 760px); }
.toc-cta { display: grid; gap: 4px; margin-top: 22px; padding: 16px; border-radius: 16px; background: var(--t-bg); }
.toc-cta .tile { background: var(--paper-2); margin-bottom: 6px; }
.toc-cta b { font-size: .95rem; }
.toc-cta small { font-size: .8rem; color: var(--ink-2); line-height: 1.6; }
.toc-cta:hover { color: inherit; box-shadow: inset 0 0 0 1px var(--t); }
.post-layout .svc-toc ol a { line-height: 1.7; }

/* long-form article typography */
.article { font-size: 1.04rem; line-height: 2.05; color: var(--ink); }
.lang-en .article { line-height: 1.75; }
.article > * + * { margin-top: 1.1em; }
.article h2 { font-size: clamp(1.35rem, 2.4vw, 1.65rem); margin-top: 2.2em; padding-top: .4em; line-height: 1.6; scroll-margin-top: calc(var(--top-h) + 20px); }
.article h3 { font-size: 1.15rem; margin-top: 1.8em; line-height: 1.7; }
.article p, .article li { color: #2f3f43; }
.article a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 5px; text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.article a:hover { text-decoration-color: var(--accent); }
.article ul, .article ol { display: grid; gap: .45em; padding-inline-start: 1.4em; }
.article ul { list-style: none; }
.article ul > li { position: relative; }
.article ul > li::before { content: ""; position: absolute; inset-inline-start: -1.05em; top: .95em; width: 6px; height: 6px; border-radius: 2px; background: var(--accent-2); }
.article ol { list-style: none; counter-reset: ol; }
.article ol > li { position: relative; counter-increment: ol; }
.article ol > li::before { content: counter(ol) "."; position: absolute; inset-inline-start: -1.4em; font-weight: 800; color: var(--accent); font-size: .92em; }
.lang-en .article ol > li::before { content: counter(ol) "."; }
.article strong { font-weight: 750; color: var(--ink); }
.article blockquote { margin-inline: 0; padding: 16px 20px; border-radius: 14px; background: var(--tint); border-inline-start: 3px solid var(--accent); color: var(--ink); }
.article code { font-family: var(--mono); font-size: .86em; padding: 1px 6px; border-radius: 6px; background: #eef2f1; direction: ltr; unicode-bidi: isolate; }
.article pre {
  direction: ltr;
  text-align: left;
  overflow-x: auto;
  padding: 18px 20px;
  border-radius: 14px;
  background: #16232a;
  color: #dbe7e5;
  font-size: .86rem;
  line-height: 1.7;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .04);
}
.article pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.table-wrap { overflow-x: auto; border-radius: 14px; border: 1px solid var(--rule-2); background: var(--paper-2); }
.article table { width: 100%; border-collapse: collapse; font-size: .92rem; line-height: 1.8; }
.article th, .article td { padding: 10px 14px; text-align: start; border-bottom: 1px solid var(--rule-2); vertical-align: top; }
.article thead th { background: var(--paper); font-weight: 750; color: var(--ink); white-space: nowrap; }
.article tbody tr:last-child td { border-bottom: 0; }

.post-cta {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px 16px;
  margin-top: 2.6em !important;
  padding: 22px;
  border-radius: 20px;
  background: linear-gradient(140deg, var(--t-bg), var(--paper-2) 70%);
  border: 1px solid var(--rule-2);
}
.post-cta .tile { background: var(--paper-2); }
.post-cta-eyebrow { font-size: .78rem; font-weight: 700; color: var(--t-ink) !important; }
.post-cta-title { font-size: 1.12rem; font-weight: 800; line-height: 1.6; margin-top: 2px; color: var(--ink) !important; }
.post-cta-text { font-size: .9rem; color: var(--ink-2) !important; margin-top: 2px; }
.post-cta-actions { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 10px; }
.post-cta-actions a { text-decoration: none !important; }
.post-cta-actions .btn { color: #fff; }
.post-cta-actions .link-btn { color: var(--ink); min-height: 40px; font-size: .88rem; }

@media (max-width: 960px) {
  .posts { grid-template-columns: 1fr 1fr; }
  .post-layout { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 680px) {
  .posts { grid-template-columns: 1fr; }
  .article { font-size: 1rem; line-height: 1.95; }
}

.post-link h3 { font-size: 1.08rem; line-height: 1.65; padding-inline-end: 24px; }
.post-link:hover h3 { color: var(--accent); }
.sec-head-link { grid-template-columns: 64px 1fr auto; max-width: none; align-items: end; }
@media (max-width: 680px) { .sec-head-link { grid-template-columns: 1fr; } }

/* ---------- touch targets & readable base size on phones ---------- */
@media (max-width: 680px) {
  body { font-size: 16px; }
  .crumbs li a, .crumbs [aria-current] { display: inline-flex; align-items: center; min-height: 32px; }
  .crumbs ol { row-gap: 2px; }
  .foot-col li a, .foot-h a, .foot-contact a { display: inline-flex; align-items: center; min-height: 40px; }
  .foot-col ul { gap: 0; }
  .chip { min-height: 36px; padding-inline: 14px; }
  .brand { min-height: 44px; }
  .blog-cats a { min-height: 40px; }
  .kw li { padding-block: 5px; }
}

/* ---------- citable answer blocks ---------- */
.answer { padding-top: 34px; }
.answer-text {
  font-size: 1.06rem;
  line-height: 2;
  padding: 20px 22px;
  border-radius: var(--r);
  background: linear-gradient(140deg, var(--tint), var(--paper-2) 75%);
  border: 1px solid var(--rule-2);
  border-inline-start: 3px solid var(--accent);
}
.lang-en .answer-text { line-height: 1.75; }
.answer-meta { margin-top: 10px; font-size: .8rem; color: var(--ink-3); }
.post-summary { margin-bottom: 2em !important; padding: 18px 22px; border-radius: var(--r); background: linear-gradient(140deg, var(--tint), var(--paper-2) 75%); border: 1px solid var(--rule-2); border-inline-start: 3px solid var(--accent); }
.post-summary-h { font-size: .8rem; font-weight: 800; color: var(--accent) !important; margin-bottom: 4px; }
.post-summary p:last-child { font-size: 1rem; line-height: 2; color: var(--ink) !important; }
.post-head .post-meta a { color: var(--ink-2); text-decoration: underline; text-underline-offset: 4px; text-decoration-color: var(--rule); }

/* =====================================================================
   Blog v2: banners, topic hubs, guides
   ===================================================================== */
.post-card { overflow: hidden; }
.post-card .post-link { padding: 0; gap: 0; }
.post-media { display: block; aspect-ratio: 16 / 9; background: var(--paper); overflow: hidden; border-bottom: 1px solid var(--rule-2); }
.post-banner-img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.post-card:hover .post-banner-img { transform: scale(1.03); }
.post-banner-fallback { display: grid; place-items: center; width: 100%; height: 100%; background: linear-gradient(135deg, var(--t-bg), var(--paper-2)); }
.post-banner-fallback .tile { width: 72px; height: 72px; border-radius: 20px; background: var(--paper-2); }
.post-banner-fallback .tile .ic { width: 34px; height: 34px; }
.post-body { display: flex; flex-direction: column; gap: 8px; padding: 18px 20px 20px; flex: 1; }
.post-title { font-size: 1.06rem; line-height: 1.7; font-weight: 800; margin: 0; }
.post-link:hover .post-title { color: var(--accent); }
.post-excerpt { color: var(--ink-2); font-size: .9rem; line-height: 1.85; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.post-lead .post-link { display: grid; grid-template-columns: 1.15fr 1fr; background: none; padding: 0; }
.post-lead .post-media { aspect-ratio: auto; min-height: 100%; border-bottom: 0; border-inline-end: 1px solid var(--rule-2); }
.post-lead .post-body { padding: clamp(22px, 3vw, 36px); justify-content: center; }
.post-lead .post-title { font-size: clamp(1.3rem, 2.4vw, 1.75rem); }
.post-lead .post-excerpt { -webkit-line-clamp: 4; font-size: .98rem; }

.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.topic { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; padding: 20px; height: 100%; transition: transform .3s var(--ease), box-shadow .3s, border-color .25s; }
.topic:hover { color: inherit; transform: translateY(-2px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--t) 35%, var(--rule)); }
.topic-text { display: grid; gap: 4px; }
.topic-text b { font-size: 1.02rem; }
.topic-text span { font-size: .86rem; color: var(--ink-2); line-height: 1.8; }
.topic-count { grid-column: 2; font-size: .76rem; color: var(--t-ink); }

.post-hero { margin-top: -6px; }
.post-banner { margin: 0; border-radius: 22px; overflow: hidden; border: 1px solid var(--rule-2); box-shadow: var(--shadow-lg); aspect-ratio: 16 / 9; background: var(--paper); }
.post-banner img { display: block; width: 100%; height: 100%; object-fit: cover; }

.hub-intro p, .cat-intro p { color: var(--ink-2); font-size: 1.02rem; line-height: 2.05; margin-bottom: 1em; }
.hub-intro p:first-of-type, .cat-intro p:first-of-type { color: var(--ink); }
.hub-intro .split-h, .cat-intro .split-h { margin-bottom: 16px; }
.cat-intro { max-width: 860px; }
.hub-services ul { display: grid; padding: 8px 12px; }
.hub-services li a { display: grid; padding: 10px 8px; border-bottom: 1px solid var(--rule-2); }
.hub-services li:last-child a { border-bottom: 0; }
.hub-services li a b { font-size: .94rem; }
.hub-services li a span { font-size: .8rem; color: var(--ink-2); }
.hub-services li a:hover b { color: var(--t-ink); }
.hub-services .plate-head .tile { width: 32px; height: 32px; border-radius: 9px; }
.hub-all { margin: 4px 20px 18px; }

.guide h3 { font-size: 1.12rem; margin: 26px 0 8px; line-height: 1.7; }
.guide h3:first-of-type { margin-top: 6px; }
.guide p { color: var(--ink-2); line-height: 2.05; margin-bottom: .9em; max-width: 72ch; }
.lang-en .guide p { line-height: 1.75; }

@media (max-width: 960px) {
  .topic-grid { grid-template-columns: 1fr 1fr; }
  .post-lead .post-link { grid-template-columns: 1fr; }
  .post-lead .post-media { aspect-ratio: 16 / 9; border-inline-end: 0; border-bottom: 1px solid var(--rule-2); }
}
@media (max-width: 680px) {
  .topic-grid { grid-template-columns: 1fr; }
  .post-banner { border-radius: 14px; }
}

/* very narrow phones: keep the header on one line */
@media (max-width: 400px) {
  .top-row { gap: 10px; }
  .top-tools { gap: 6px; }
  .lang { display: none; }           /* language switch stays in the mobile menu */
  .sos, .burger { width: 38px; height: 38px; }
  .brand .mark { width: 34px; height: 34px; }
  .brand-text b { font-size: 1rem; }
  .wrap { width: min(100% - 2 * var(--gut), var(--wrap)); }
}

@media (max-width: 420px) {
  .finder kbd { display: none; }
  /* long English labels must wrap instead of pushing the layout wider */
  .btn, .link-btn, .btn-ghost { white-space: normal; text-align: center; padding-inline: 16px; }
  .pane-actions { flex-direction: column; align-items: stretch; }
}