/* ============================================================
   Development.ir — AI Development
   Design: Iran Designer  |  irandesigner.com
   ============================================================ */

@font-face{
  font-family:"Vazirmatn";
  src:url("Vazirmatn.woff2") format("woff2");
  font-weight:100 900;
  font-style:normal;
  font-display:swap;
}

/* ---------- Tokens ---------- */
:root{
  --bg:#05070f;
  --bg-alt:#080b16;
  --surface:rgba(255,255,255,.035);
  --surface-2:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.09);
  --line-str:rgba(255,255,255,.16);

  --txt:#eef1f8;
  --txt-2:#a4adc4;
  --txt-3:#6f7a93;

  --c1:#4f7dff;   /* blue   */
  --c2:#8b5cf6;   /* violet */
  --c3:#22d3ee;   /* cyan   */
  --ok:#34d399;

  --grad:linear-gradient(120deg,var(--c3),var(--c1) 45%,var(--c2));
  --r-s:10px; --r-m:16px; --r-l:22px; --r-xl:30px;
  --shadow:0 24px 60px -20px rgba(0,0,0,.85);
  --ease:cubic-bezier(.22,1,.36,1);
  --max:1200px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html{overflow-x:hidden}
body{
  font-family:Vazirmatn,-apple-system,BlinkMacSystemFont,"Segoe UI",Tahoma,sans-serif;
  background:var(--bg);color:var(--txt);
  line-height:1.9;font-size:16px;font-weight:400;
  overflow-x:hidden;position:relative;
  overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
::selection{background:var(--c1);color:#fff}

/* Scrollbar */
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:#05070f}
::-webkit-scrollbar-thumb{background:#1d2440;border-radius:20px;border:2px solid #05070f}
::-webkit-scrollbar-thumb:hover{background:#2b3560}

/* ---------- Layout ---------- */
.container{width:min(100% - 3rem,var(--max));margin-inline:auto}
.container--narrow{width:min(100% - 3rem,860px)}
.section{padding:clamp(4.5rem,9vw,8rem) 0;position:relative;z-index:2}
.section--alt{background:linear-gradient(180deg,transparent,rgba(255,255,255,.022),transparent)}

/* ---------- Background FX ---------- */
#neural-bg{position:fixed;inset:0;width:100%;height:100%;z-index:0;opacity:.55;pointer-events:none}
.grid-overlay{
  position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.4;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 10%,transparent 75%);
  mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 10%,transparent 75%);
}
.glow{position:fixed;border-radius:50%;filter:blur(120px);z-index:0;pointer-events:none;opacity:.28}
.glow--1{width:620px;height:620px;background:var(--c1);top:-240px;inset-inline-end:-180px}
.glow--2{width:520px;height:520px;background:var(--c2);top:52%;inset-inline-start:-240px;opacity:.2}

/* ---------- Preloader ---------- */
.preloader{
  position:fixed;inset:0;z-index:9999;background:var(--bg);
  display:grid;place-content:center;gap:1.4rem;justify-items:center;
  transition:opacity .6s var(--ease),visibility .6s;
}
.preloader.done{opacity:0;visibility:hidden}
.preloader__core{
  width:56px;height:56px;border-radius:50%;
  border:2px solid rgba(255,255,255,.08);border-top-color:var(--c3);border-right-color:var(--c1);
  animation:spin .9s linear infinite;
}
.preloader__txt{font-size:.8rem;color:var(--txt-3);letter-spacing:.05em}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Scroll progress ---------- */
.scroll-progress{
  position:fixed;top:0;inset-inline-start:0;height:2px;width:0;
  background:var(--grad);z-index:1000;box-shadow:0 0 14px rgba(79,125,255,.7);
}

/* ---------- Header ---------- */
.header{
  position:fixed;top:0;inset-inline:0;z-index:900;
  padding:1.15rem 0;transition:all .4s var(--ease);
  border-bottom:1px solid transparent;
}
.header.stuck{
  padding:.6rem 0;background:rgba(5,7,15,.82);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom-color:var(--line);
}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:1rem}

.logo{display:flex;align-items:center;gap:.7rem}
.logo__mark{
  width:42px;height:42px;flex:none;display:grid;place-items:center;
  border-radius:12px;color:#fff;background:var(--grad);
  box-shadow:0 8px 24px -6px rgba(79,125,255,.6);
}
.logo__mark svg{width:24px;height:24px}
.logo__text{display:flex;flex-direction:column;line-height:1.25}
.logo__text b{font-size:1.06rem;letter-spacing:.02em;font-weight:800}
.logo__text i{font-style:normal;font-size:.68rem;color:var(--txt-3)}

.nav{display:flex;align-items:center;gap:.35rem}
.nav > a{
  padding:.55rem .85rem;border-radius:var(--r-s);font-size:.9rem;color:var(--txt-2);
  transition:color .25s,background .25s;position:relative;
}
.nav > a:not(.nav__cta):hover,.nav > a.active{color:var(--txt);background:var(--surface)}
.nav__cta{margin-inline-start:.5rem}

.burger{display:none;width:44px;height:44px;background:var(--surface);border:1px solid var(--line);
  border-radius:12px;cursor:pointer;padding:0;place-content:center;gap:5px}
.burger span{display:block;width:19px;height:2px;background:var(--txt);border-radius:2px;transition:.3s var(--ease);margin-inline:auto}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.85rem 1.6rem;border-radius:999px;border:1px solid transparent;
  font-size:.94rem;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .25s var(--ease),box-shadow .3s,background .3s,border-color .3s;
}
.btn svg{width:17px;height:17px}
.btn--sm{padding:.55rem 1.1rem;font-size:.86rem}
.btn--block{width:100%}
.btn--primary{background:var(--grad);color:#fff;box-shadow:0 14px 34px -12px rgba(79,125,255,.75)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 20px 44px -12px rgba(79,125,255,.9)}
.btn--ghost{border-color:var(--line-str);color:var(--txt);background:var(--surface)}
.btn--ghost:hover{background:var(--surface-2);border-color:rgba(255,255,255,.28);transform:translateY(-2px)}
.btn--wa{
  margin-top:1.8rem;background:rgba(37,211,102,.12);color:#4ade80;
  border-color:rgba(37,211,102,.32);
}
.btn--wa svg{width:19px;height:19px}
.btn--wa:hover{background:#25d366;color:#04220f;border-color:transparent;transform:translateY(-2px);
  box-shadow:0 16px 34px -14px rgba(37,211,102,.9)}
.btn:active{transform:translateY(0)}

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


.sec-head{text-align:center;max-width:680px;margin:0 auto clamp(2.5rem,5vw,4rem)}
.sec-head__tag{
  display:inline-block;font-size:.78rem;letter-spacing:.14em;color:var(--c3);
  text-transform:uppercase;margin-bottom:.9rem;font-weight:600;
}
.sec-head__title{font-size:clamp(1.3rem,2.95vw,2.03rem);font-weight:800;line-height:1.45;letter-spacing:-.01em}
.sec-head__sub{color:var(--txt-2);margin-top:1rem;font-size:1.02rem}

/* ---------- Hero ---------- */
.hero{padding:clamp(8rem,15vw,11rem) 0 0;position:relative;z-index:2}
.hero__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(2rem,5vw,4rem);align-items:center}
/* let grid children shrink below their content width (code block, long words) */
.hero__grid > *,.contact > *,.cards > *,.stack > *{min-width:0}
.hero__title{
  font-size:clamp(1.54rem,3.92vw,2.8rem);font-weight:800;line-height:1.35;
  margin:1.5rem 0 1.3rem;letter-spacing:-.02em;
}
.hero__title .grad{display:block}
.hero__lead{color:var(--txt-2);font-size:clamp(.98rem,1.6vw,1.1rem);max-width:56ch}
.hero__actions{display:flex;gap:.9rem;margin-top:2.2rem;flex-wrap:wrap}


/* Terminal */
.hero__visual{position:relative}
.terminal{
  min-width:0;max-width:100%;
  border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;
  background:linear-gradient(160deg,rgba(20,26,48,.92),rgba(8,11,22,.96));
  box-shadow:var(--shadow);direction:ltr;
}
.terminal__bar{
  display:flex;align-items:center;gap:.45rem;padding:.85rem 1.1rem;
  border-bottom:1px solid var(--line);background:rgba(255,255,255,.03);
}
.terminal__bar span{width:11px;height:11px;border-radius:50%;background:#39405c}
.terminal__bar span:nth-child(1){background:#ff5f57}
.terminal__bar span:nth-child(2){background:#febc2e}
.terminal__bar span:nth-child(3){background:#28c840}
.terminal__bar p{margin-inline-start:auto;font-size:.72rem;color:var(--txt-3);font-family:ui-monospace,Menlo,monospace}
.terminal__body{
  padding:1.4rem 1.3rem;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  font-size:.8rem;line-height:2;color:#c8d1e8;overflow-x:auto;
}
.c-key{color:#c084fc}.c-str{color:#7dd3a0}.c-cmt{color:#5b6584}.c-ok{color:var(--ok)}
.cursor{display:inline-block;width:8px;height:15px;background:var(--c3);vertical-align:-2px;margin-inline-start:4px;animation:blink 1.1s steps(2) infinite}
@keyframes blink{50%{opacity:0}}

/* Marquee */
.marquee{
  margin-top:clamp(3.5rem,7vw,6rem);padding:1.1rem 0;overflow:hidden;
  border-block:1px solid var(--line);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
}
.marquee__track{display:flex;gap:2rem;width:max-content;animation:slide 34s linear infinite;direction:ltr}
.marquee__track span{font-size:.92rem;color:var(--txt-3);letter-spacing:.06em;font-weight:600;white-space:nowrap}
.marquee:hover .marquee__track{animation-play-state:paused}
@keyframes slide{to{transform:translateX(-50%)}}

/* ---------- Cards ---------- */
/* flex, not grid: items on a short last row grow to fill the width */
.cards{display:flex;flex-wrap:wrap;gap:1.3rem}
.cards > *{flex:1 1 310px}
.card{
  position:relative;padding:2rem 1.7rem;border:1px solid var(--line);border-radius:var(--r-l);
  background:var(--surface);overflow:hidden;
  transition:transform .4s var(--ease),border-color .4s,background .4s;
}
.card::before{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .45s;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%),rgba(79,125,255,.14),transparent 62%);
}
.card:hover{transform:translateY(-6px);border-color:var(--line-str);background:var(--surface-2)}
.card:hover::before{opacity:1}
.card > *{position:relative;z-index:1}
.card__icon{
  display:grid;place-items:center;width:52px;height:52px;border-radius:15px;margin-bottom:1.3rem;
  background:linear-gradient(150deg,rgba(79,125,255,.2),rgba(139,92,246,.12));
  border:1px solid var(--line-str);color:var(--c3);
}
.card__icon svg{width:25px;height:25px}
.card h3{font-size:.8rem;font-weight:700;margin-bottom:.7rem;line-height:1.7}
.card p{color:var(--txt-2);font-size:.93rem}
.card__list{margin-top:1.2rem;padding-top:1.1rem;border-top:1px dashed var(--line);display:grid;gap:.5rem}
.card__list li{font-size:.85rem;color:var(--txt-3);padding-inline-start:1.35rem;position:relative}
.card__list li::before{
  content:"";position:absolute;inset-inline-start:0;top:.72em;width:6px;height:6px;
  border-radius:50%;background:var(--c3);box-shadow:0 0 9px var(--c3);
}

/* ---------- Stack ---------- */
.stack{display:flex;flex-wrap:wrap;gap:1.2rem}
.stack > *{flex:1 1 178px}
.stack__col{padding:1.7rem 1.5rem;border:1px solid var(--line);border-radius:var(--r-l);background:var(--surface);transition:.35s var(--ease)}
.stack__col:hover{border-color:var(--line-str);transform:translateY(-5px)}
.stack__col h3{font-size:.67rem;color:var(--c3);margin-bottom:1.1rem;padding-bottom:.8rem;border-bottom:1px solid var(--line)}
.stack__col li{font-size:.9rem;color:var(--txt-2);padding:.42rem 0;direction:ltr;text-align:end}
.stack__col li:hover{color:var(--txt)}

/* ---------- Contact ---------- */
.contact{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(2rem,5vw,3.5rem);
  padding:clamp(2rem,4vw,3.2rem);border:1px solid var(--line);border-radius:var(--r-xl);
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.012));
  box-shadow:var(--shadow);
}
.contact .sec-head__title{text-align:start;font-size:clamp(1.12rem,2.38vw,1.61rem)}
.contact__info > p{color:var(--txt-2);margin-top:1rem;font-size:.94rem}
.contact__list{margin-top:2rem;display:grid;gap:1rem}
.contact__list li{display:flex;align-items:center;gap:.85rem;font-size:.92rem;color:var(--txt-2)}
.contact__list svg{width:20px;height:20px;flex:none;color:var(--c3)}
.contact__list a:hover{color:var(--c3)}

.contact__form{display:grid;gap:1.05rem;align-content:start}
.field{display:grid;gap:.45rem}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:1.05rem}
.field label{font-size:.85rem;color:var(--txt-2)}
.field input,.field select,.field textarea{
  width:100%;padding:.85rem 1.05rem;border-radius:var(--r-s);
  background:rgba(255,255,255,.045);border:1px solid var(--line);
  color:var(--txt);font-size:.92rem;transition:border-color .25s,background .25s,box-shadow .25s;
  font-family:inherit;resize:vertical;
}
.field input::placeholder,.field textarea::placeholder{color:var(--txt-3);opacity:.75}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c1);background:rgba(255,255,255,.07);
  box-shadow:0 0 0 3px rgba(79,125,255,.16);
}
.field select{appearance:none;cursor:pointer;
  background-image:linear-gradient(45deg,transparent 50%,var(--txt-3) 50%),linear-gradient(135deg,var(--txt-3) 50%,transparent 50%);
  background-position:left 1.1rem top 55%,left .75rem top 55%;
  background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field select option{background:#0c1122;color:var(--txt)}
.field.invalid input,.field.invalid textarea{border-color:#f87171;box-shadow:0 0 0 3px rgba(248,113,113,.13)}
.err{font-size:.76rem;color:#f87171;min-height:0;display:none}
.field.invalid .err{display:block}
.form-note{font-size:.86rem;text-align:center;min-height:1.2em}
.form-note.ok{color:var(--ok)}
.form-note.bad{color:#f87171}
.captcha-box{display:flex;align-items:center;justify-content:space-between;gap:.75rem;padding:.7rem .9rem;border:1px solid var(--line);border-radius:var(--r-s);background:var(--surface)}
.captcha-box span{font-size:.88rem;color:var(--txt-2)}
.captcha-refresh{width:34px;height:34px;border:1px solid var(--line);border-radius:9px;background:var(--bg-alt);color:var(--c3);cursor:pointer;transition:.2s var(--ease)}
.captcha-refresh:hover{border-color:var(--c3);transform:rotate(35deg)}
.hp-field{position:absolute!important;inline-size:1px!important;block-size:1px!important;overflow:hidden!important;clip-path:inset(50%)!important;white-space:nowrap!important}
.btn[disabled]{opacity:.65;cursor:not-allowed;pointer-events:none}

/* ---------- Footer ---------- */
.footer{position:relative;z-index:2;border-top:1px solid var(--line);background:var(--bg-alt);padding-top:clamp(3rem,6vw,4.5rem)}
.footer__top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:2.5rem;padding-bottom:3rem}
.footer__brand p{color:var(--txt-3);font-size:.88rem;margin-top:1.1rem;max-width:42ch}
.footer__col h3{font-size:.67rem;margin-bottom:1.2rem;font-weight:700}
.footer__col a{display:block;font-size:.88rem;color:var(--txt-3);padding:.32rem 0;transition:color .25s,padding .25s}
.footer__col a:hover{color:var(--c3);padding-inline-start:5px}
.socials{display:flex;gap:.6rem;margin-top:1.1rem}
.socials a{
  width:38px;height:38px;display:grid;place-items:center;padding:0;
  border:1px solid var(--line);border-radius:11px;background:var(--surface);color:var(--txt-2);
  transition:.3s var(--ease);
}
.socials a:hover{color:#fff;border-color:transparent;background:var(--grad);transform:translateY(-3px);padding:0}
.socials svg{width:17px;height:17px}

.footer__bottom{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  padding:1.4rem 0;border-top:1px solid var(--line);
}
.footer__bottom p{font-size:.84rem;color:var(--txt-3)}
.footer__bottom b{color:var(--txt-2);font-weight:600}
.credit a{color:var(--c3);font-weight:600;border-bottom:1px dashed rgba(34,211,238,.4);transition:.25s}
.credit a:hover{color:var(--c1);border-bottom-color:var(--c1)}

/* ---------- To top ---------- */
.to-top{
  position:fixed;bottom:1.6rem;inset-inline-start:max(1rem,calc((100vw - var(--max))/2));z-index:800;
  width:46px;height:46px;display:grid;place-items:center;border-radius:14px;
  background:var(--grad);color:#fff;box-shadow:0 12px 30px -10px rgba(79,125,255,.85);
  opacity:0;visibility:hidden;transform:translateY(14px);transition:.35s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{transform:translateY(-3px)}
.to-top svg{width:19px;height:19px}

/* ---------- Floating WhatsApp ---------- */
.wa-float{
  position:fixed;bottom:1.6rem;inset-inline-end:max(1rem,calc((100vw - var(--max))/2));z-index:800;
  display:flex;align-items:center;gap:.6rem;padding:.75rem 1.15rem;border-radius:999px;
  background:#25d366;color:#04220f;font-size:.88rem;font-weight:700;
  box-shadow:0 14px 34px -12px rgba(37,211,102,.85);transition:.3s var(--ease);
}
.wa-float svg{width:22px;height:22px;flex:none}
.wa-float:hover{transform:translateY(-3px);box-shadow:0 20px 42px -12px rgba(37,211,102,1)}
/* lift both floating buttons clear of the footer credit line */
.wa-float.lifted,.to-top.lifted{bottom:6.2rem}
.wa-float::after{
  content:"";position:absolute;inset:0;border-radius:999px;border:2px solid #25d366;
  animation:ring 2.6s ease-out infinite;
}
@keyframes ring{0%{transform:scale(1);opacity:.7}70%,100%{transform:scale(1.32);opacity:0}}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.1s}
.reveal[data-delay="2"]{transition-delay:.2s}
.reveal[data-delay="3"]{transition-delay:.3s}
.reveal[data-delay="4"]{transition-delay:.4s}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .hero__grid,.contact{grid-template-columns:1fr}
  .hero__visual{margin-top:1rem}
  .footer__top{grid-template-columns:1fr 1fr;gap:2rem}
}
@media (max-width:860px){
  .burger{display:grid}
  .nav{
    position:fixed;inset:0 0 auto;top:0;padding:6rem 1.6rem 2.2rem;
    flex-direction:column;align-items:stretch;gap:.3rem;
    background:rgba(5,7,15,.97);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);
    border-bottom:1px solid var(--line);
    transform:translateY(-102%);transition:transform .45s var(--ease);
  }
  .nav.open{transform:translateY(0)}
  .nav > a{padding:.85rem 1rem;font-size:1rem;border-bottom:1px solid var(--line)}
  .nav__cta{margin:.9rem 0 0;border-bottom:none !important;justify-content:center}
  .header{padding:.7rem 0}
}
@media (max-width:640px){
  .container,.container--narrow{width:min(100% - 2rem,var(--max))}
  body{font-size:15px}
  .field-row{grid-template-columns:1fr}
  .footer{padding-top:2.25rem}
  .footer__top{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1.75rem 1rem;padding-bottom:1.75rem}
  .footer__brand{grid-column:1/-1;padding-bottom:1.5rem;border-bottom:1px solid var(--line)}
  .footer__brand .logo{justify-content:flex-start}
  .footer__brand p{margin-top:.9rem;font-size:.84rem;line-height:1.9;max-width:none}
  .footer__col{min-width:0}
  .footer__col[aria-label="خدمات"]{grid-column:1/-1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:1rem}
  .footer__col[aria-label="خدمات"] h3{grid-column:1/-1}
  .footer__col h3{margin-bottom:.7rem;font-size:.72rem;color:var(--txt-2)}
  .footer__col a{font-size:.82rem;line-height:1.65;padding:.3rem 0;overflow-wrap:anywhere}
  .socials{margin-top:.75rem;gap:.5rem}
  .socials a{width:36px;height:36px}
  .footer__bottom{flex-direction:column;text-align:center;gap:.4rem;padding:1.15rem 0 5.5rem}
  .footer__bottom p{font-size:.77rem;line-height:1.7}
  .to-top{bottom:1rem;inset-inline-start:1rem;width:42px;height:42px}
  .wa-float{bottom:1rem;inset-inline-end:1rem;padding:.7rem;border-radius:50%}
  .wa-float span{display:none}
  .wa-float.lifted,.to-top.lifted{bottom:1rem}
  .contact{padding:1.5rem 1.2rem}
}

/* ---------- Motion / print ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}