/* Negahban landing page.
   One stylesheet, no framework, no build step: the page is static files on
   nginx, so anything that needs compiling is a liability at deploy time. */

@font-face{font-family:Vazirmatn;src:url(fonts/Vazirmatn-Light.woff2) format("woff2");font-weight:300;font-display:swap}
@font-face{font-family:Vazirmatn;src:url(fonts/Vazirmatn-Regular.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:Vazirmatn;src:url(fonts/Vazirmatn-Medium.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:Vazirmatn;src:url(fonts/Vazirmatn-Bold.woff2) format("woff2");font-weight:700;font-display:swap}

/* Dark is the default: it is the brand, and it is what the panel looks like.
   Light is offered because this page gets read in daylight, on a phone, by
   someone who was sent a link -- and because a projector in a bright meeting
   room turns the dark version to mud.

   The theme resolves in three steps, most specific last:
     1. :root            -- dark, the default
     2. prefers-color-scheme: light, guarded so an explicit dark choice wins
     3. [data-theme]     -- the visitor pressed the button; theme.js sets it
   Tokens only. Nothing below this block names a colour except the camera
   frame, which is dark in both themes on purpose. */
:root{
  --bg:#0A0910; --surface:#15131F; --surface-2:#1C1829;
  --line:#272133; --line-strong:#39314D;
  --ink:#F4F2F8; --muted:#A6A1B6; --faint:#726D83;
  --brand:#9D6CF7; --brand-soft:#BA9CFF; --brand-deep:#5B2FA8;
  --brand-edge:rgba(157,108,247,.5); --brand-tint:rgba(157,108,247,.14);
  --signal:#F5B83D; --signal-text:#F5B83D;
  --ok:#6FD898; --ok-halo:rgba(111,216,152,.14); --no:#E08A8A;
  --mark-shield:#9D6CF7;
  --maxw:1120px;
  --panel:linear-gradient(160deg,rgba(157,108,247,.10),rgba(21,19,31,.9));
  --header-bg:rgba(10,9,16,.78);
  --strip-bg:rgba(21,19,31,.5);
  --th-bg:rgba(28,24,41,.6);
  --card-shadow:0 30px 70px -40px #000;
  --hl-gradient:linear-gradient(120deg,var(--brand-soft),#fff 70%);
  --wash:
    radial-gradient(900px 540px at 88% -8%, rgba(157,108,247,.16), transparent 62%),
    radial-gradient(760px 460px at 2% 18%, rgba(91,47,168,.15), transparent 60%);
}

/* Light. The violet darkens to #6D28D9 -- the brand violet is ~2.3:1 on white
   and unreadable as text; this is ~5.9:1. Same for the gold, which is a fine
   pupil on a shield and illegible as a word on paper. */
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#FBF9FE; --surface:#FFFFFF; --surface-2:#F4F0FB;
    --line:#E6DEF3; --line-strong:#CDBFE5;
    --ink:#171226; --muted:#56496F; --faint:#7A7091;
    --brand:#6D28D9; --brand-soft:#5B21B6; --brand-deep:#4C1D95;
    --brand-edge:rgba(109,40,217,.28); --brand-tint:rgba(109,40,217,.10);
    --signal-text:#A15C07;
    --ok:#15803D; --ok-halo:rgba(21,128,61,.14); --no:#C2410C;
    --mark-shield:#1B1430;
    --panel:linear-gradient(160deg,rgba(109,40,217,.07),rgba(255,255,255,.95));
    --header-bg:rgba(251,249,254,.82);
    --strip-bg:rgba(244,240,251,.7);
    --th-bg:rgba(244,240,251,.9);
    --card-shadow:0 24px 60px -42px rgba(23,18,38,.45);
    --hl-gradient:linear-gradient(120deg,var(--brand),#2A1055 70%);
    --wash:
      radial-gradient(900px 540px at 88% -8%, rgba(109,40,217,.10), transparent 62%),
      radial-gradient(760px 460px at 2% 18%, rgba(91,47,168,.07), transparent 60%);
  }
}
:root[data-theme="light"]{
  --bg:#FBF9FE; --surface:#FFFFFF; --surface-2:#F4F0FB;
  --line:#E6DEF3; --line-strong:#CDBFE5;
  --ink:#171226; --muted:#56496F; --faint:#7A7091;
  --brand:#6D28D9; --brand-soft:#5B21B6; --brand-deep:#4C1D95;
  --brand-edge:rgba(109,40,217,.28); --brand-tint:rgba(109,40,217,.10);
  --signal-text:#A15C07;
  --ok:#15803D; --ok-halo:rgba(21,128,61,.14); --no:#C2410C;
  --mark-shield:#1B1430;
  --panel:linear-gradient(160deg,rgba(109,40,217,.07),rgba(255,255,255,.95));
  --header-bg:rgba(251,249,254,.82);
  --strip-bg:rgba(244,240,251,.7);
  --th-bg:rgba(244,240,251,.9);
  --card-shadow:0 24px 60px -42px rgba(23,18,38,.45);
  --hl-gradient:linear-gradient(120deg,var(--brand),#2A1055 70%);
  --wash:
    radial-gradient(900px 540px at 88% -8%, rgba(109,40,217,.10), transparent 62%),
    radial-gradient(760px 460px at 2% 18%, rgba(91,47,168,.07), transparent 60%);
}

*{box-sizing:border-box;margin:0;padding:0}
html{overflow-x:clip;scroll-behavior:smooth;scroll-padding-top:86px;-webkit-text-size-adjust:100%}
body{
  font-family:Vazirmatn,system-ui,sans-serif;font-weight:300;font-size:16.5px;line-height:1.95;
  color:var(--ink);background:var(--bg);overflow-x:hidden;
  background-image:var(--wash);
  background-repeat:no-repeat;
  color-scheme:dark light;
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.ltr{direction:ltr;unicode-bidi:isolate}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-weight:700;line-height:1.4;text-wrap:balance}
section{padding:88px 0;position:relative}
.eyebrow{font-size:13px;font-weight:500;color:var(--brand-soft);letter-spacing:.02em}
h2{font-size:clamp(23px,3.4vw,33px);margin-top:10px}
.lede{color:var(--muted);font-size:17px;margin-top:16px;max-width:62ch}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:var(--header-bg);border-bottom:1px solid transparent;transition:border-color .2s
}
header.stuck{border-bottom-color:var(--line)}
.bar{display:flex;align-items:center;gap:14px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.01em}
.brand svg{width:30px;height:30px;flex:none}
nav{display:flex;gap:26px;margin-inline-start:auto;font-size:14.5px;font-weight:400;color:var(--muted)}
nav a:hover{color:var(--ink)}
.btn{
  display:inline-flex;align-items:center;gap:8px;border-radius:999px;padding:11px 22px;
  font-size:14.5px;font-weight:500;white-space:nowrap;transition:transform .15s,box-shadow .15s
}
.btn-primary{background:linear-gradient(135deg,var(--brand),#7B4FE0);color:#fff;
  box-shadow:0 8px 24px -10px rgba(157,108,247,.9)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 30px -10px rgba(157,108,247,1)}
.btn-ghost{border:1px solid var(--line-strong);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-soft)}
.bar .btn{margin-inline-start:4px}
.theme-btn{display:grid;place-items:center;width:38px;height:38px;flex:none;
  border:1px solid var(--line-strong);border-radius:11px;background:none;color:var(--muted);
  cursor:pointer;margin-inline-start:14px;transition:color .2s,border-color .2s}
.theme-btn:hover{color:var(--brand-soft);border-color:var(--brand)}
.theme-btn svg{width:17px;height:17px}
.theme-btn .moon{display:none}
:root[data-theme="light"] .theme-btn .moon{display:block}
:root[data-theme="light"] .theme-btn .sun{display:none}
@media (prefers-color-scheme:light){
  :root:not([data-theme="dark"]) .theme-btn .moon{display:block}
  :root:not([data-theme="dark"]) .theme-btn .sun{display:none}
}
nav+.theme-btn{margin-inline-start:14px}
.menu-btn{display:none;margin-inline-start:auto;background:none;border:1px solid var(--line-strong);
  border-radius:10px;color:var(--ink);padding:7px 10px;cursor:pointer;font:inherit;font-size:13px}

/* ---------- hero ---------- */
.hero{padding:76px 0 64px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:52px;align-items:center}
h1{font-size:clamp(31px,5.2vw,52px);line-height:1.32;letter-spacing:-.015em}
h1 .hl{background:var(--hl-gradient);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p{color:var(--muted);font-size:18px;margin-top:20px;max-width:54ch}
.cta-row{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.hero-note{margin-top:22px;font-size:13.5px;color:var(--faint)}

/* the event card: what the system actually produces, as the hero visual */
.event{
  background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:22px;
  box-shadow:var(--card-shadow);
}
.event-head{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--faint)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--ok);flex:none;
  box-shadow:0 0 0 4px var(--ok-halo)}
.frame{
  position:relative;margin-top:14px;border-radius:14px;height:200px;overflow:hidden;
  background:linear-gradient(170deg,#241E38,#15121F 60%);border:1px solid var(--line)
}
.frame .scan{position:absolute;inset-inline:0;height:2px;background:linear-gradient(90deg,transparent,#9D6CF7,transparent);
  top:0;animation:scan 3.4s ease-in-out infinite}
@keyframes scan{0%,100%{top:14%}50%{top:82%}}
.box{position:absolute;border:2px solid #9D6CF7;border-radius:7px}
.box::after{
  content:attr(data-name);position:absolute;top:calc(100% + 5px);inset-inline-start:0;
  font-size:10.5px;font-weight:500;color:#F4F2F8;background:rgba(157,108,247,.92);
  border-radius:5px;padding:1px 7px;white-space:nowrap
}
.box::before{content:"";position:absolute;inset:1px;border-radius:5px;
  background:radial-gradient(58% 42% at 50% 36%, rgba(255,255,255,.16), transparent 72%)}
.box.unknown{border-color:#8B849C}
.box.unknown::after{background:rgba(114,109,131,.92)}
.wire{position:absolute;inset-inline:8%;top:78%;height:2px;background:repeating-linear-gradient(
  90deg,#F5B83D 0 8px,transparent 8px 16px);opacity:.75}
.evrow{display:flex;justify-content:space-between;gap:10px;font-size:13px;
  padding:9px 2px;border-top:1px solid var(--line)}
.evrow:first-of-type{margin-top:12px}
.evrow b{font-weight:500}
.evrow .in{color:var(--ok)}
.evrow .out{color:var(--signal-text)}

/* ---------- strip ---------- */
.strip{border-block:1px solid var(--line);background:var(--strip-bg)}
.strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding-block:30px}
.stat .v{font-size:27px;font-weight:700;color:var(--brand-soft);line-height:1.3}
.stat .l{font-size:13.5px;color:var(--muted);line-height:1.75}

/* ---------- layers ---------- */
.layers{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:38px}
.layer{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px}
.layer.on{border-color:var(--brand-edge);background:var(--panel)}
.layer .k{font-size:12.5px;color:var(--faint);font-weight:500}
.layer h3{font-size:18px;margin-top:6px}
.layer p{color:var(--muted);font-size:14.5px;margin-top:10px}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:38px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px;
  transition:border-color .2s,transform .2s}
.card:hover{border-color:var(--line-strong);transform:translateY(-2px)}
.card .ic{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:var(--brand-tint);color:var(--brand-soft)}
.card .ic svg{width:19px;height:19px}
.card h3{font-size:16.5px;margin-top:14px}
.card p{color:var(--muted);font-size:14.5px;margin-top:8px}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start;margin-top:38px}
/* A grid item's automatic minimum size is its content's min-content width, so
   the table's min-width would otherwise push the whole column -- and its
   sibling -- wider than the viewport instead of scrolling inside its wrapper. */
.split>*,.hero-grid>*{min-width:0}
ul.bul{list-style:none;display:grid;gap:16px}
ul.bul li{color:var(--muted);font-size:15.5px;padding-inline-start:26px;position:relative}
ul.bul li::before{content:"";position:absolute;inset-inline-start:0;top:12px;width:9px;height:9px;
  border-radius:50%;background:var(--brand)}
ul.bul b{color:var(--ink);font-weight:500}

/* A table is the one block here with a min-content width of its own; left
   alone it stretches the document past the viewport on a phone. */
.table-wrap{overflow-x:auto;overscroll-behavior-x:contain}
table{width:100%;min-width:520px;border-collapse:collapse;font-size:14.5px;background:var(--surface);
  border:1px solid var(--line);border-radius:16px;overflow:hidden}
th,td{text-align:start;padding:14px 16px;border-bottom:1px solid var(--line);color:var(--muted);font-weight:300}
th{color:var(--faint);font-weight:500;font-size:13px;background:var(--th-bg)}
td b{color:var(--ink);font-weight:500}
tr:last-child td{border-bottom:none}

/* The accent edge sits on the inline start, so the corners that must be square
   are the ones on that side -- which is the right in Persian and the left in a
   left-to-right locale. border-radius has no logical form, hence the two rules. */
.note{background:var(--panel);border:1px solid var(--line);border-inline-start:3px solid var(--brand);
  border-radius:14px 0 0 14px;padding:20px 24px;color:var(--muted);font-size:15px;margin-top:28px}
:dir(ltr) .note{border-radius:0 14px 14px 0}
.note b{color:var(--ink);font-weight:500}

/* ---------- privacy ---------- */
.never{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.never span{border:1px solid var(--line);background:var(--surface);border-radius:999px;
  padding:8px 16px;font-size:14px;color:var(--muted)}
.never span::before{content:"×";color:var(--no);font-weight:700;margin-inline-end:8px}

/* ---------- cta ---------- */
.cta{background:var(--panel);border:1px solid var(--brand-edge);border-radius:24px;
  padding:48px 40px;text-align:center}
.cta h2{margin-top:0}
.cta p{color:var(--muted);max-width:58ch;margin:14px auto 0}
.cta .cta-row{justify-content:center}
.contact{display:flex;gap:28px;justify-content:center;flex-wrap:wrap;margin-top:28px;
  font-size:14.5px;color:var(--muted)}
.contact a,.contact .where{display:inline-flex;align-items:center;gap:8px}
/* The address is prose, not a link: there is no map URL worth sending someone
   to, and a dead link is worse than plain text. */
.contact .where{cursor:default}
.contact a:hover{color:var(--brand-soft)}
.contact svg{width:16px;height:16px;flex:none;color:var(--brand-soft)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:34px 0;margin-top:28px}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  align-items:center;font-size:13.5px;color:var(--faint)}
footer .brand{font-size:15px}
footer .brand svg{width:22px;height:22px}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .hero-grid,.split{grid-template-columns:1fr;gap:34px}
  .layers,.cards{grid-template-columns:repeat(2,1fr)}
  .strip .wrap{grid-template-columns:repeat(2,1fr);gap:24px}
}
@media (max-width:640px){
  body{font-size:15.5px}
  section{padding:62px 0}
  nav{display:none}
  nav.open{display:flex;position:absolute;top:68px;inset-inline:16px;flex-direction:column;gap:2px;
    background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:10px 6px}
  nav.open a{padding:10px 14px;border-radius:9px}
  nav.open a:hover{background:var(--surface-2)}
  .menu-btn{display:block}
  .bar .btn{display:none}
  .layers,.cards{grid-template-columns:1fr}
  .cta{padding:34px 22px}
  table{font-size:13.5px}
  th,td{padding:11px 12px}
}