/* ============ TOKENS ============ */
  :root{
    /* color */
    --graphite:#17191C;
    --panel:#1F2226;
    --panel-2:#25282D;
    --paper:#F3F1EC;
    --ink:#1A1B1E;
    --ink-soft:#4B4D51;
    --amber:#E8912B;
    --amber-ink:#9C5712;
    --line-dark:rgba(243,241,236,0.12);
    --line-light:rgba(26,27,30,0.14);
    --ok:#7FA88C;

    /* type */
    --display:'Big Shoulders Display', sans-serif;
    --body:'IBM Plex Sans', sans-serif;
    --mono:'IBM Plex Mono', monospace;

    /* space scale (8px base) */
    --sp-1:8px;
    --sp-2:16px;
    --sp-3:24px;
    --sp-4:32px;
    --sp-5:48px;
    --sp-6:64px;
    --sp-7:96px;
  }

  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:var(--body);
    font-size:16px;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  img,svg{display:block;max-width:100%;}
  a{color:inherit;}
  h1,h2,h3{font-family:var(--display);margin:0;line-height:0.95;letter-spacing:-0.01em;}
  p{margin:0;}
  .wrap{max-width:1180px;margin:0 auto;padding:0 var(--sp-3);}
  .eyebrow{
    font-family:var(--mono);
    font-size:12px;
    letter-spacing:0.14em;
    text-transform:uppercase;
    display:inline-flex;
    align-items:center;
    gap:var(--sp-1);
  }
  .eyebrow::before{
    content:"";
    width:6px;height:6px;border-radius:50%;
    background:var(--amber);
    flex:none;
  }
  .on-dark .eyebrow{color:var(--amber);}
  .on-light .eyebrow{color:var(--amber-ink);}

  button{font-family:inherit;cursor:pointer;}

  .btn{
    display:inline-flex;
    align-items:center;
    gap:var(--sp-1);
    font-family:var(--mono);
    font-size:14px;
    letter-spacing:0.03em;
    text-decoration:none;
    padding:14px 24px;
    border-radius:3px;
    border:1px solid transparent;
    transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
  }
  .btn-primary{
    background:var(--amber);
    color:var(--graphite);
    font-weight:600;
    box-shadow:0 0 0 rgba(232,145,43,0);
  }
  .btn-primary:hover{
    transform:translateY(-2px);
    box-shadow:0 10px 24px rgba(232,145,43,0.28);
    background:#f3a13c;
  }
  .btn-ghost{
    border-color:var(--line-dark);
    color:var(--paper);
  }
  .btn-ghost:hover{border-color:var(--amber); color:var(--amber);}

  /* ============ NAV ============ */
  .nav{
    position:sticky;top:0;z-index:50;
    background:rgba(23,25,28,0.92);
    backdrop-filter:blur(6px);
    border-bottom:1px solid var(--line-dark);
  }
  .nav .wrap{
    display:flex;align-items:center;justify-content:space-between;
    height:76px;
  }
  .logo{
    display:flex;align-items:center;gap:10px;
    font-family:var(--mono);
    font-weight:500;
    font-size:15px;
    letter-spacing:0.08em;
    color:var(--paper);
    text-decoration:none;
  }
  .logo .dot{width:9px;height:9px;border-radius:2px;background:var(--amber);}
  .logo img{height:120px;width:auto;border-radius:3px;display:block;}
  .nav-links{
    display:none;
    gap:var(--sp-4);
    list-style:none;
    margin:0;padding:0;
    font-family:var(--mono);
    font-size:13px;
    letter-spacing:0.04em;
  }
  .nav-links a{
    color:rgba(243,241,236,0.7);
    text-decoration:none;
    transition:color .15s ease;
  }
  .nav-links a:hover{color:var(--amber);}
  .nav-cta{display:none;}
  .nav-toggle{
    background:none;border:1px solid var(--line-dark);border-radius:3px;
    width:40px;height:40px;
    display:flex;align-items:center;justify-content:center;
  }
  .nav-toggle svg{stroke:var(--paper);}
  .mobile-menu{
    display:none;
    flex-direction:column;
    gap:var(--sp-2);
    padding:var(--sp-3);
    background:var(--graphite);
    border-bottom:1px solid var(--line-dark);
  }
  .mobile-menu.open{display:flex;}
  .mobile-menu a{
    color:var(--paper);text-decoration:none;
    font-family:var(--mono);font-size:14px;letter-spacing:0.04em;
    padding:var(--sp-1) 0;
  }

  @media(min-width:800px){
    .nav-links{display:flex;}
    .nav-cta{display:inline-flex;}
    .nav-toggle{display:none;}
    .mobile-menu{display:none !important;}
  }

  /* ============ HERO ============ */
  .hero{
    background:var(--graphite);
    color:var(--paper);
    padding:var(--sp-6) 0 var(--sp-7);
    border-bottom:1px solid var(--line-dark);
  }
  .hero .wrap{
    display:grid;
    grid-template-columns:1fr;
    gap:var(--sp-6);
  }
  .hero-copy .eyebrow{margin-bottom:var(--sp-3);}
  .hero h1{
    font-size:clamp(34px,7vw,64px);
    font-weight:800;
    text-transform:uppercase;
    max-width:15ch;
  }
  .hero-sub{
    margin-top:var(--sp-3);
    max-width:46ch;
    font-size:17px;
    color:rgba(243,241,236,0.78);
  }
  .hero-actions{
    margin-top:var(--sp-4);
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:var(--sp-3);
  }
  .hero-actions .link-scroll{
    font-family:var(--mono);
    font-size:14px;
    color:rgba(243,241,236,0.65);
    text-decoration:none;
    border-bottom:1px solid var(--line-dark);
    padding-bottom:2px;
  }
  .hero-actions .link-scroll:hover{color:var(--amber);border-color:var(--amber);}

  /* control-panel signature */
  .panel{
    background:var(--panel);
    border:1px solid var(--line-dark);
    border-radius:6px;
    padding:var(--sp-4);
    box-shadow:0 24px 60px rgba(0,0,0,0.35);
  }
  .panel-head{
    display:flex;justify-content:space-between;align-items:center;
    font-family:var(--mono);font-size:11px;letter-spacing:0.1em;
    color:rgba(243,241,236,0.45);
    text-transform:uppercase;
    margin-bottom:var(--sp-3);
    padding-bottom:var(--sp-2);
    border-bottom:1px solid var(--line-dark);
  }
  .panel-row{
    display:flex;align-items:center;justify-content:space-between;
    padding:var(--sp-2) 0;
    border-bottom:1px solid var(--line-dark);
    font-family:var(--mono);
    font-size:13px;
  }
  .panel-row:last-child{border-bottom:none;}
  .panel-row .label{
    display:flex;align-items:center;gap:10px;
    color:var(--paper);
    letter-spacing:0.02em;
  }
  .panel-row .led{
    width:8px;height:8px;border-radius:50%;
    background:var(--amber);
    opacity:0.25;
    transition:opacity .5s ease, box-shadow .5s ease;
    flex:none;
  }
  .panel.lit .panel-row .led{
    opacity:1;
    box-shadow:0 0 8px rgba(232,145,43,0.75);
  }
  .panel-row .status{color:var(--ok);font-size:12px;}
  .panel-caption{
    margin-top:var(--sp-3);
    font-size:12.5px;
    color:rgba(243,241,236,0.45);
    font-family:var(--mono);
  }

  @media(min-width:900px){
    .hero .wrap{grid-template-columns:1.35fr 1fr;align-items:center;}
  }

  /* ============ TRUST STRIP ============ */
  .trust{
    background:var(--paper);
    padding:var(--sp-4) 0;
    border-bottom:1px solid var(--line-light);
  }
  .trust .wrap{
    display:flex;flex-direction:column;gap:var(--sp-2);
  }
  .trust-label{
    font-family:var(--mono);font-size:12px;letter-spacing:0.1em;
    text-transform:uppercase;color:var(--ink-soft);
  }
  .trust-logos{
    display:flex;flex-wrap:wrap;gap:var(--sp-5);
    font-family:var(--display);
    font-weight:800;
    font-size:22px;
    text-transform:uppercase;
    color:var(--ink);
  }
  @media(min-width:800px){
    .trust .wrap{flex-direction:row;align-items:center;justify-content:space-between;}
  }

  /* ============ SECTION HEADS ============ */
  .section{padding:var(--sp-7) 0;}
  .section-head{
    max-width:56ch;
    margin-bottom:var(--sp-6);
    opacity:0;
    transform:translateY(14px);
    transition:opacity .6s ease, transform .6s ease;
  }
  .section-head.in-view{opacity:1;transform:translateY(0);}
  .section-head .eyebrow{margin-bottom:var(--sp-2);}
  .section-head h2{
    font-size:clamp(28px,4.4vw,42px);
    font-weight:800;
    text-transform:uppercase;
  }

  /* ============ SERVICES ============ */
  .services-list{display:flex;flex-direction:column;gap:var(--sp-3);}
  .service-row{
    display:grid;
    grid-template-columns:1fr;
    gap:var(--sp-3);
    padding:var(--sp-4);
    border:1px solid var(--line-light);
    border-radius:6px;
    background:#fff;
  }
  .service-row:nth-child(2){
    background:var(--ink);
    color:var(--paper);
    border-color:var(--ink);
  }
  .service-row:nth-child(2) .service-desc{color:rgba(243,241,236,0.75);}
  .service-row:nth-child(2) .example{border-color:var(--line-dark);color:rgba(243,241,236,0.6);}
  .service-icon{
    width:44px;height:44px;
    flex:none;
    color:var(--amber-ink);
  }
  .service-row:nth-child(2) .service-icon{color:var(--amber);}
  .service-title{
    font-family:var(--display);
    font-weight:800;
    font-size:26px;
    text-transform:uppercase;
    margin-top:var(--sp-2);
  }
  .service-desc{
    margin-top:var(--sp-1);
    max-width:52ch;
    color:var(--ink-soft);
    font-size:15.5px;
  }
  .example{
    margin-top:var(--sp-3);
    display:inline-block;
    font-family:var(--mono);
    font-size:12.5px;
    padding:8px 12px;
    border:1px solid var(--line-light);
    border-radius:3px;
    color:var(--ink-soft);
  }
  @media(min-width:760px){
    .service-row{grid-template-columns:44px 1fr;align-items:start;padding:var(--sp-5);}
    .service-row .service-icon{grid-row:1/3;}
  }

  /* ============ WORK ============ */
  .work-item{
    display:grid;
    grid-template-columns:1fr;
    gap:var(--sp-4);
    padding:var(--sp-5) 0;
    border-top:1px solid var(--line-light);
  }
  .work-item:last-child{border-bottom:1px solid var(--line-light);}
  .work-text .eyebrow{margin-bottom:var(--sp-2);}
  .work-title{
    font-family:var(--display);
    font-weight:800;
    font-size:clamp(24px,3.4vw,32px);
    text-transform:uppercase;
  }
  .work-desc{margin-top:var(--sp-2);max-width:50ch;color:var(--ink-soft);font-size:15.5px;}

  /* schematic UI mockups */
  .mock{
    background:var(--graphite);
    border-radius:6px;
    padding:var(--sp-3);
    border:1px solid var(--line-dark);
  }
  .mock-bar{height:8px;border-radius:2px;background:var(--panel-2);margin-bottom:8px;}
  .mock-row{display:flex;gap:8px;margin-bottom:8px;}
  .mock-row .cell{height:14px;border-radius:2px;background:var(--panel-2);flex:1;}
  .mock-row .cell.amber{background:rgba(232,145,43,0.55);flex:0 0 18%;}
  .mock-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;}
  .mock-grid .tile{aspect-ratio:1;border-radius:4px;background:var(--panel-2);}
  .mock-grid .tile:nth-child(2){background:rgba(232,145,43,0.35);}

  @media(min-width:860px){
    .work-item{grid-template-columns:1fr 1fr;align-items:center;}
    .work-item:nth-child(even) .work-text{order:2;}
  }

  /* ============ ABOUT ============ */
  .about{background:var(--ink);color:var(--paper);}
  .about-quote{
    max-width:64ch;
    border-left:3px solid var(--amber);
    padding-left:var(--sp-4);
  }
  .about-quote p{
    font-size:clamp(19px,2.6vw,24px);
    line-height:1.5;
    color:rgba(243,241,236,0.9);
  }
  .about-role{
    margin-top:var(--sp-3);
    font-family:var(--mono);
    font-size:13px;
    color:rgba(243,241,236,0.5);
    letter-spacing:0.04em;
  }

  /* ============ CONTACT ============ */
  .contact{
    background:var(--amber);
    color:var(--graphite);
  }
  .contact h2{
    font-size:clamp(32px,6vw,58px);
    font-weight:800;
    text-transform:uppercase;
    max-width:14ch;
  }
  .contact-sub{
    margin-top:var(--sp-2);
    max-width:44ch;
    font-size:17px;
    color:rgba(23,25,28,0.75);
  }
  .contact-actions{margin-top:var(--sp-4);display:flex;flex-wrap:wrap;gap:var(--sp-2);}
  .btn-outline-dark{
    background:transparent;
    color:var(--graphite);
    border:1.5px solid var(--graphite);
  }
  .btn-outline-dark:hover{background:var(--graphite);color:var(--paper);}
  .btn-dark{
    background:var(--graphite);
    color:var(--paper);
    font-family:var(--mono);
    font-weight:500;
    padding:14px 24px;
    border-radius:3px;
    text-decoration:none;
    display:inline-flex;
    gap:8px;align-items:center;
    transition:transform .15s ease, box-shadow .15s ease;
  }
  .btn-dark:hover{
    transform:translateY(-2px);
    box-shadow:0 10px 24px rgba(23,25,28,0.35);
  }

  /* ============ FOOTER ============ */
  footer{background:var(--graphite);color:rgba(243,241,236,0.55);padding:var(--sp-5) 0;}
  .footer-wrap{
    display:flex;flex-direction:column;gap:var(--sp-3);
    font-family:var(--mono);font-size:13px;
  }
  .footer-links{display:flex;flex-wrap:wrap;gap:var(--sp-3);}
  .footer-links a{color:rgba(243,241,236,0.55);text-decoration:none;}
  .footer-links a:hover{color:var(--amber);}
  .footer-bottom{
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:var(--sp-2);
    padding-top:var(--sp-3);
    border-top:1px solid var(--line-dark);
  }

  @media(min-width:800px){
    .footer-wrap{flex-direction:row;justify-content:space-between;align-items:flex-start;}
  }

  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
    *{animation:none !important;transition:none !important;}
  }

  /* ============ CASE STUDY PAGES ============ */
  .case-hero{
    background:var(--graphite);
    color:var(--paper);
    padding:var(--sp-6) 0 var(--sp-5);
    border-bottom:1px solid var(--line-dark);
  }
  .case-back{
    display:inline-flex;align-items:center;gap:6px;
    font-family:var(--mono);font-size:13px;
    color:rgba(243,241,236,0.55);
    text-decoration:none;
    margin-bottom:var(--sp-4);
  }
  .case-back:hover{color:var(--amber);}
  .case-hero h1{
    font-size:clamp(30px,6vw,52px);
    font-weight:800;
    text-transform:uppercase;
    max-width:20ch;
    margin-top:var(--sp-2);
  }
  .case-hero .case-sub{
    margin-top:var(--sp-3);
    max-width:52ch;
    font-size:17px;
    color:rgba(243,241,236,0.78);
  }
  .case-meta{
    display:flex;flex-wrap:wrap;gap:var(--sp-2);
    margin-top:var(--sp-4);
  }
  .case-meta span{
    font-family:var(--mono);
    font-size:12px;
    padding:6px 12px;
    border:1px solid var(--line-dark);
    border-radius:3px;
    color:rgba(243,241,236,0.65);
  }

  .case-block{
    padding:var(--sp-6) 0;
    border-bottom:1px solid var(--line-light);
  }
  .case-block .eyebrow{margin-bottom:var(--sp-3);}
  .case-block h2{
    font-family:var(--display);
    font-weight:800;
    font-size:clamp(24px,3.6vw,34px);
    text-transform:uppercase;
    max-width:22ch;
  }
  .case-block p{
    margin-top:var(--sp-3);
    max-width:60ch;
    font-size:16px;
    color:var(--ink-soft);
  }
  .case-features{
    margin-top:var(--sp-4);
    display:grid;
    grid-template-columns:1fr;
    gap:var(--sp-2);
    max-width:70ch;
  }
  .case-features li{
    list-style:none;
    display:flex;
    gap:12px;
    align-items:flex-start;
    padding:var(--sp-2) 0;
    border-top:1px solid var(--line-light);
    font-size:15px;
    color:var(--ink);
  }
  .case-features li:first-child{border-top:none;}
  .case-features li::before{
    content:"";
    width:6px;height:6px;border-radius:1px;
    background:var(--amber-ink);
    margin-top:8px;
    flex:none;
  }
  .case-outcome{
    background:var(--ink);
    color:var(--paper);
  }
  .case-outcome p{color:rgba(243,241,236,0.8);}
  .case-outcome .eyebrow{color:var(--amber);}

  .case-nav-next{
    padding:var(--sp-5) 0;
    display:flex;
    justify-content:space-between;
    align-items:center;
    flex-wrap:wrap;
    gap:var(--sp-3);
  }
  .case-nav-next a{
    font-family:var(--mono);
    font-size:14px;
    text-decoration:none;
    color:var(--ink);
    border-bottom:1px solid var(--line-light);
    padding-bottom:2px;
  }
  .case-nav-next a:hover{color:var(--amber-ink);border-color:var(--amber-ink);}

  @media(min-width:760px){
    .case-features{grid-template-columns:1fr 1fr;}
  }

  /* ============ ÜRÜNLERİMİZ — inline demo penceresi ============ */
  .product-frame{
    background:var(--graphite);
    border:1px solid var(--line-dark);
    border-radius:8px;
    overflow:hidden;
    box-shadow:0 24px 60px rgba(0,0,0,0.25);
  }
  .product-frame-bar{
    display:flex;align-items:center;gap:var(--sp-2);
    padding:10px 14px;
    background:var(--panel);
    border-bottom:1px solid var(--line-dark);
  }
  .product-frame-dots{display:flex;gap:6px;flex:none;}
  .product-frame-dots span{width:9px;height:9px;border-radius:50%;background:rgba(243,241,236,0.18);}
  .product-frame-url{
    flex:1;
    font-family:var(--mono);
    font-size:12px;
    color:rgba(243,241,236,0.5);
    background:var(--graphite);
    border:1px solid var(--line-dark);
    border-radius:4px;
    padding:5px 10px;
    text-align:center;
    overflow:hidden;
    text-overflow:ellipsis;
    white-space:nowrap;
  }
  .product-frame-viewport {
    width: 100%;
    max-width: 1344px; /* Siyah pencerenin ekrandaki maksimum boyutunu büyüttük */
    height: 756px; /* 16:9 oranını bozmadan yeni yüksekliği ayarladık */
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    background: #0f1530;
    border-radius: 0 0 8px 8px;
}

.product-frame-viewport iframe {
    width: 1920px;
    height: 1080px;
    border: none;
    position: absolute;
    top: 0;
    left: 0;
    transform-origin: 0 0;
    
    /* 1344 / 1920 = 0.7 | Yazılar artık çok daha net ve büyük okunacak */
    transform: scale(0.7); 
}
  .product-note{
    margin-top:var(--sp-3);
    font-family:var(--mono);
    font-size:12.5px;
    color:var(--ink-soft);
  }
  @media(max-width:700px){
    .product-frame-viewport{width:100%;height:410px;}
    .product-frame-viewport iframe{transform:scale(0.39);}
  }