:root{--acc:#7C3AED;--acc2:#EC4899;--acc3:#06B6D4;--acc4:#10B981;--glow:rgba(124,58,237,.35);}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
.dark body{background:#030308;color:#E8E8F8;}
html:not(.dark) body{background:#F0F4FF;color:#0F0F1A;}
body{font-family:'Vazirmatn','Inter',sans-serif;overflow-x:hidden;transition:background .5s,color .5s;}

/* پس‌زمینه سبک */
#bg-canvas{position:fixed;inset:0;width:100vw;height:100vh;z-index:-1;pointer-events:none; opacity: 0.6;}

/* GLASS */
.glass{backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);transition:all .3s;}
.dark .glass{background:rgba(15,10,40,.55);border:1px solid rgba(124,58,237,.12);}
html:not(.dark) .glass{background:rgba(255,255,255,.75);border:1px solid rgba(124,58,237,.18);box-shadow:0 4px 24px rgba(124,58,237,.07);}

/* SCROLLBAR */
::-webkit-scrollbar{width:4px;}::-webkit-scrollbar-track{background:transparent;}::-webkit-scrollbar-thumb{background:var(--acc);border-radius:2px;}

/* LOADER */
#loader{position:fixed;inset:0;z-index:9999;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.5rem;transition:opacity .6s;}
.dark #loader{background:#030308;}html:not(.dark) #loader{background:#F0F4FF;}
.loader-ring{width:52px;height:52px;border:3px solid rgba(124,58,237,.2);border-radius:50%;border-top-color:var(--acc);animation:spin 1s linear infinite;}
.loader-text{font-size:.8rem;font-weight:700;background:linear-gradient(135deg,var(--acc),var(--acc2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:3px;}
@keyframes spin{to{transform:rotate(360deg);}}

/* NAV */
nav{position:fixed;width:100%;z-index:500;padding:1rem 0;transition:all .4s;}

/* GRAD TEXT */
.grad-text{background:linear-gradient(135deg,var(--acc) 0%,var(--acc2) 50%,var(--acc3) 100%);background-size:200%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:gShift 4s ease infinite;}
@keyframes gShift{0%,100%{background-position:0%;}50%{background-position:100%;}}

/* BUTTONS */
.btn-primary{background:linear-gradient(135deg,var(--acc),#9333EA);color:#fff;border:none;cursor:pointer;font-family:inherit;font-weight:700;transition:transform .25s,box-shadow .25s;box-shadow:0 0 25px var(--glow);text-decoration:none;display:inline-block;}
.btn-primary:hover{transform:translateY(-3px) scale(1.04);box-shadow:0 0 45px var(--glow);}
.btn-outline{background:transparent;cursor:pointer;font-family:inherit;font-weight:700;transition:all .3s;text-decoration:none;display:inline-block;}
.dark .btn-outline{border:1px solid rgba(255,255,255,.12);color:#E8E8F8;}
html:not(.dark) .btn-outline{border:1px solid rgba(0,0,0,.15);color:#0F0F1A;}
.btn-outline:hover{border-color:var(--acc);color:var(--acc);transform:translateY(-3px);}

/* SEC LABEL */
.sec-label{display:inline-block;font-size:.75rem;letter-spacing:3px;text-transform:uppercase;color:var(--acc);margin-bottom:.7rem;}
.sec-label::before,.sec-label::after{content:'—';margin:0 .4rem;opacity:.4;}

/* AVATAR */
.avatar-ring{border-radius:50%;background:linear-gradient(135deg,var(--acc),var(--acc2));padding:3px;box-shadow:0 0 50px var(--glow);}
.avatar-inner{width:100%;height:100%;border-radius:50%;overflow:hidden;display:flex;align-items:center;justify-content:center;}
.dark .avatar-inner{background:#0D0818;}html:not(.dark) .avatar-inner{background:#EDE9FE;}

/* SKILL BARS */
.bar-track{height:4px;border-radius:2px;overflow:hidden;}
.dark .bar-track{background:rgba(255,255,255,.06);}html:not(.dark) .bar-track{background:rgba(0,0,0,.08);}
.bar-fill{height:100%;border-radius:2px;transform:scaleX(0);transform-origin:right;transition:transform 1.3s cubic-bezier(.4,0,.2,1);}
.bar-fill.go{transform:scaleX(1);}

/* STAT */
.stat-num{font-size:2.8rem;font-weight:900;background:linear-gradient(135deg,var(--acc),var(--acc2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}

/* PROJECT CARD */
.proj-card{border-radius:20px;overflow:hidden;transition:transform .4s,box-shadow .4s;cursor:pointer;}
.proj-card:hover{transform:translateY(-10px);}
.dark .proj-card:hover{box-shadow:0 25px 60px rgba(124,58,237,.25);}
html:not(.dark) .proj-card:hover{box-shadow:0 25px 60px rgba(124,58,237,.15);}

/* DEMO MODAL */
#demo-modal{display:none;opacity:0;position:fixed;inset:0;z-index:800;align-items:center;justify-content:center;background:rgba(0,0,0,.88);backdrop-filter:blur(14px);transition:opacity .3s;}
#demo-modal.active{display:flex;opacity:1;}
.iframe-wrap{width:96vw;height:92vh;border-radius:18px;overflow:hidden;position:relative;box-shadow:0 40px 120px rgba(0,0,0,.8);}
.dark .iframe-wrap{background:#0D0818;}html:not(.dark) .iframe-wrap{background:#fff;}
.mac-bar{height:42px;display:flex;align-items:center;padding:0 1rem;justify-content:space-between;flex-shrink:0;}
.dark .mac-bar{background:#0D0818;border-bottom:1px solid rgba(255,255,255,.06);}
html:not(.dark) .mac-bar{background:#f0f0f0;border-bottom:1px solid rgba(0,0,0,.08);}

/* PROCESS */
.step-num{font-size:3.5rem;font-weight:900;background:linear-gradient(135deg,var(--acc),var(--acc2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;opacity:.2;position:absolute;top:.6rem;left:1rem;}

/* TOAST */
.toast{position:fixed;bottom:2rem;left:2rem;padding:1rem 1.8rem;border-radius:12px;font-size:1rem;font-weight:700;z-index:9999;transform:translateY(100px);opacity:0;transition:all .4s; background:linear-gradient(135deg,var(--acc),var(--acc2)); color: white; box-shadow: 0 10px 30px rgba(124,58,237,0.4);}
.toast.show{transform:translateY(0);opacity:1;}

/* TAG */
.tag{font-size:.7rem;padding:.2rem .65rem;border-radius:50px;font-weight:600;}

/* TAB */
.tab-btn{padding:.4rem 1.2rem;border-radius:50px;font-family:inherit;font-size:.82rem;cursor:pointer;transition:all .3s;}
.dark .tab-btn{background:transparent;border:1px solid rgba(255,255,255,.1);color:rgba(255,255,255,.5);}
html:not(.dark) .tab-btn{background:transparent;border:1px solid rgba(0,0,0,.1);color:rgba(0,0,0,.5);}
.tab-btn.active,.tab-btn:hover{background:var(--acc);border-color:var(--acc);color:#fff;}

/* REVEAL */
.reveal{opacity:0;transform:translateY(35px);transition:opacity .8s,transform .8s;}
.reveal.on{opacity:1;transform:none;}

/* TYPEWRITER */
.tw-cursor{animation:blink 1s infinite;color:var(--acc3);}
@keyframes blink{0%,100%{opacity:1;}50%{opacity:0;}}

/* SCROLL HINT */
@keyframes scrollHint{0%,100%{opacity:1;transform:scaleY(1);}50%{opacity:.3;transform:scaleY(.4);}}

/* HERO BADGE */
.hero-badge{display:inline-flex;align-items:center;gap:.5rem;border-radius:50px;padding:.4rem 1.1rem;font-size:.85rem;font-weight:700;margin-bottom:1.5rem;}
.dark .hero-badge{background:rgba(124,58,237,.1);border:1px solid rgba(124,58,237,.3);color:#A78BFA;}
html:not(.dark) .hero-badge{background:rgba(124,58,237,.08);border:1px solid rgba(124,58,237,.2);color:var(--acc);}

/* AI CHAT CSS */
#ai-chat-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #7C3AED, #EC4899);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  color: white;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(124, 58, 237, 0.4);
  z-index: 1000;
  transition: transform 0.3s;
}
#ai-chat-btn:hover {
  transform: scale(1.1);
}
#ai-chat-window {
  position: fixed;
  bottom: 95px;
  right: 24px;
  width: 350px;
  height: 450px;
  background: #ffffff;
  border-radius: 20px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.2);
  z-index: 1000;
  display: none;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(124, 58, 237, 0.2);
}
.dark #ai-chat-window { background: #0D0818; border-color: rgba(124, 58, 237, 0.4); }
#ai-chat-window.show { display: flex; animation: slideUp 0.3s ease-out forwards; }

@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

#ai-chat-window .header {
  background: linear-gradient(135deg, #7C3AED, #EC4899);
  padding: 16px;
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
}