/* ============================================================
   Selçuklu WEB — Design System
   Navy + Cyan, AI / neural-network themed
   ============================================================ */

:root{
  --navy-950:#060e21;
  --navy-900:#0b1b3d;
  --navy-850:#0e2247;
  --navy-800:#122554;
  --navy-700:#1a3268;
  --navy-600:#28417f;
  --cyan-300:#7fe3f7;
  --cyan-400:#4dd6f0;
  --cyan-500:#22c1e6;
  --cyan-600:#17a6c4;
  --cyan-700:#0f849e;
  --ink:#0b1b3d;
  --text:#1c2536;
  --text-muted:#5b6478;
  --text-soft:#8891a3;
  --bg:#f6f8fc;
  --bg-alt:#eef2f9;
  --card:#ffffff;
  --border:#e5eaf3;
  --radius-sm:10px;
  --radius:18px;
  --radius-lg:28px;
  --shadow-sm:0 8px 20px -12px rgba(11,27,61,.18);
  --shadow:0 24px 48px -24px rgba(11,27,61,.28);
  --shadow-lg:0 36px 70px -28px rgba(11,27,61,.35);
  --grad-primary:linear-gradient(135deg,#0b1b3d 0%,#123a6b 48%,#17a6c4 100%);
  --grad-accent:linear-gradient(135deg,#22c1e6,#4dd6f0);
  --grad-text:linear-gradient(120deg,#123a6b,#17a6c4 60%,#4dd6f0);
  --container:1180px;
  --header-h:112px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea,select{font:inherit}
h1,h2,h3,h4{font-family:'Space Grotesk','Inter',sans-serif;line-height:1.15;letter-spacing:-.01em;color:var(--navy-900)}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
section{position:relative}
.icon{width:1em;height:1em}

/* ---------- Utility ---------- */
.text-gradient{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  padding:7px 16px;border-radius:999px;
  background:rgba(23,166,196,.1);color:var(--cyan-700);
  border:1px solid rgba(23,166,196,.25);
}
.badge.on-dark{background:rgba(77,214,240,.12);color:var(--cyan-300);border-color:rgba(127,227,247,.25)}
.section-head{max-width:680px;margin-bottom:52px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(1.7rem,3vw,2.4rem);margin:14px 0 14px}
.section-head p{color:var(--text-muted);font-size:1.05rem}
.section-pad{padding:100px 0}
.section-pad-sm{padding:64px 0}
.bg-alt{background:var(--bg-alt)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 28px;border-radius:999px;font-weight:600;font-size:.95rem;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,color .25s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--grad-accent);color:var(--navy-950);box-shadow:0 14px 30px -12px rgba(34,193,230,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px -12px rgba(34,193,230,.65)}
.btn-dark{background:var(--navy-900);color:#fff}
.btn-dark:hover{background:var(--navy-800);transform:translateY(-2px)}
.btn-outline{border:1.5px solid rgba(11,27,61,.18);color:var(--navy-900)}
.btn-outline:hover{border-color:var(--cyan-600);color:var(--cyan-700);transform:translateY(-2px)}
.btn-outline.on-dark{border-color:rgba(255,255,255,.3);color:#fff}
.btn-outline.on-dark:hover{border-color:var(--cyan-400);color:var(--cyan-300)}
.btn-sm{padding:10px 20px;font-size:.85rem}
.btn svg{width:18px;height:18px}

.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal-delay-1{transition-delay:.08s}
.reveal-delay-2{transition-delay:.16s}
.reveal-delay-3{transition-delay:.24s}
.reveal-delay-4{transition-delay:.32s}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  padding:26px 0;transition:padding .3s ease,background .3s ease,box-shadow .3s ease;
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:24px}
.site-header.scrolled{
  padding:16px 0;background:rgba(255,255,255,.85);backdrop-filter:blur(14px);
  box-shadow:0 10px 30px -18px rgba(11,27,61,.25);
}
.brand{display:flex;align-items:center;gap:10px;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1.05rem;color:var(--navy-900);flex-shrink:0}
.brand img{height:60px;width:auto;transition:filter .3s ease,height .3s ease}
.site-header.scrolled .brand img{height:48px}
.site-header.on-dark:not(.scrolled) .brand img{filter:brightness(0) invert(1)}
.site-header.on-dark:not(.scrolled) .nav-link,
.site-header.on-dark:not(.scrolled) .brand{color:#fff}
.site-header.on-dark:not(.scrolled) .lang-switch{color:#fff;border-color:rgba(255,255,255,.35)}

.main-nav{display:flex;align-items:center;gap:10px;flex-wrap:nowrap}
.nav-link{
  padding:13px 20px;border-radius:999px;font-size:.94rem;font-weight:500;color:var(--text);
  transition:background .2s ease,color .2s ease;white-space:nowrap;
}
.nav-link:hover,.nav-link.active{background:rgba(23,166,196,.1);color:var(--cyan-700)}
.site-header.on-dark:not(.scrolled) .nav-link:hover,
.site-header.on-dark:not(.scrolled) .nav-link.active{background:rgba(255,255,255,.12);color:var(--cyan-300)}

.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.lang-switch{
  width:38px;height:38px;border-radius:999px;border:1.5px solid var(--border);
  display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:700;
  color:var(--navy-900);transition:all .2s ease;
}
.lang-switch:hover{border-color:var(--cyan-600);color:var(--cyan-700)}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;align-items:center;justify-content:center;background:rgba(11,27,61,.06)}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:'';display:block;width:20px;height:2px;background:var(--navy-900);position:relative;transition:.25s;
}
.nav-toggle span::before{position:absolute;top:-6px}
.nav-toggle span::after{position:absolute;top:6px}
.site-header.on-dark:not(.scrolled) .nav-toggle span,
.site-header.on-dark:not(.scrolled) .nav-toggle span::before,
.site-header.on-dark:not(.scrolled) .nav-toggle span::after{background:#fff}

/* ---------- Hero ---------- */
.hero{
  position:relative;padding:calc(var(--header-h) + 90px) 0 120px;
  background:var(--grad-primary);color:#fff;overflow:hidden;isolation:isolate;
}
.hero-canvas{position:absolute;inset:0;z-index:-1;opacity:.55}
.hero::after{
  content:'';position:absolute;inset:0;z-index:-1;
  background:radial-gradient(circle at 85% 20%,rgba(77,214,240,.25),transparent 55%),
             radial-gradient(circle at 10% 90%,rgba(23,166,196,.2),transparent 50%);
}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.hero-copy h1{font-size:clamp(2.2rem,4.4vw,3.5rem);color:#fff;margin:20px 0 22px}
.hero-copy p{font-size:1.12rem;color:rgba(255,255,255,.78);max-width:540px;margin-bottom:34px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:52px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;max-width:640px}
.hero-stat b{display:block;font-family:'Space Grotesk',sans-serif;font-size:1.7rem;color:var(--cyan-300)}
.hero-stat span{font-size:.78rem;color:rgba(255,255,255,.65)}

.hero-visual{position:relative;height:420px;display:flex;align-items:center;justify-content:center}
.hero-orb{
  position:absolute;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,rgba(77,214,240,.5),rgba(11,27,61,0) 65%);
  filter:blur(4px);
}
.hero-card{
  position:relative;width:100%;max-width:360px;padding:28px;border-radius:24px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(18px);box-shadow:0 30px 60px -20px rgba(0,0,0,.4);
}
.hero-card .node-row{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.hero-card .node-row:last-child{border-bottom:none}
.hero-card .node-dot{width:38px;height:38px;border-radius:12px;background:var(--grad-accent);display:flex;align-items:center;justify-content:center;color:var(--navy-950);flex-shrink:0}
.hero-card .node-dot svg{width:19px;height:19px}
.hero-card .node-text b{display:block;font-size:.88rem;color:#fff}
.hero-card .node-text span{font-size:.76rem;color:rgba(255,255,255,.6)}
.hero-card-tag{
  position:absolute;top:-16px;right:24px;background:var(--navy-950);color:var(--cyan-300);
  font-size:.7rem;font-weight:700;letter-spacing:.06em;padding:8px 14px;border-radius:999px;
  border:1px solid rgba(127,227,247,.35);text-transform:uppercase;
}

/* ---------- Product / feature grids ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}

.product-card{
  position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:32px 28px;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  overflow:hidden;
}
.product-card::before{
  content:'';position:absolute;inset:0;opacity:0;transition:opacity .3s ease;
  background:linear-gradient(160deg,rgba(23,166,196,.08),transparent 60%);
}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(23,166,196,.35)}
.product-card:hover::before{opacity:1}
.soon-badge{
  position:absolute;top:20px;right:20px;z-index:2;
  background:#4F46E5;color:#fff;font-size:.68rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  padding:6px 13px;border-radius:999px;box-shadow:0 8px 18px -8px rgba(79,70,229,.55);
}
.product-icon{
  width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  margin-bottom:20px;color:#fff;position:relative;z-index:1;
}
.product-icon svg{width:26px;height:26px}
.product-card h3{font-size:1.18rem;margin-bottom:10px;position:relative;z-index:1}
.product-card p{color:var(--text-muted);font-size:.94rem;margin-bottom:18px;position:relative;z-index:1}
.product-card .card-link{position:relative;z-index:1;font-size:.86rem;font-weight:700;color:var(--cyan-700);display:inline-flex;align-items:center;gap:6px}
.product-card .card-link svg{width:15px;height:15px;transition:transform .25s ease}
.product-card:hover .card-link svg{transform:translateX(4px)}

.feature-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:28px;transition:transform .3s ease,box-shadow .3s ease;
}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-sm)}
.feature-card .f-icon{
  width:48px;height:48px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:rgba(23,166,196,.1);color:var(--cyan-700);margin-bottom:16px;
}
.feature-card .f-icon svg{width:22px;height:22px}
.feature-card h4{font-size:1.02rem;margin-bottom:8px}
.feature-card p{color:var(--text-muted);font-size:.88rem}

.feature-card.on-dark{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12)}
.feature-card.on-dark h4{color:#fff}
.feature-card.on-dark p{color:rgba(255,255,255,.65)}
.feature-card.on-dark .f-icon{background:rgba(77,214,240,.16);color:var(--cyan-300)}

/* ---------- AI section (home) ---------- */
.ai-panel{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  background:var(--grad-primary);color:#fff;padding:70px 60px;isolation:isolate;
}
.ai-panel::after{
  content:'';position:absolute;inset:0;z-index:-1;
  background:radial-gradient(circle at 90% 10%,rgba(77,214,240,.28),transparent 55%);
}
.ai-panel-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:56px;align-items:center}
.ai-panel h2{color:#fff;font-size:clamp(1.6rem,3vw,2.2rem);margin:14px 0 18px}
.ai-panel p{color:rgba(255,255,255,.75);margin-bottom:26px}

/* ---------- Stats bar ---------- */
.stats-bar{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:36px 20px;box-shadow:var(--shadow-sm);margin-top:-90px;position:relative;z-index:5;
}
.stats-bar .stat{text-align:center;border-right:1px solid var(--border)}
.stats-bar .stat:last-child{border-right:none}
.stats-bar .stat b{display:block;font-family:'Space Grotesk',sans-serif;font-size:2.1rem;color:var(--navy-900)}
.stats-bar .stat span{font-size:.82rem;color:var(--text-muted)}

/* ---------- Timeline (about) ---------- */
.timeline{position:relative;padding-left:32px;border-left:2px solid var(--border)}
.timeline-item{position:relative;padding-bottom:34px}
.timeline-item::before{
  content:'';position:absolute;left:-40px;top:2px;width:16px;height:16px;border-radius:50%;
  background:var(--grad-accent);box-shadow:0 0 0 4px rgba(23,166,196,.15);
}
.timeline-item h4{font-size:1rem;margin-bottom:6px}
.timeline-item p{color:var(--text-muted);font-size:.92rem}

/* ---------- Portfolio ---------- */
.filter-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:44px}
.filter-tab{
  padding:10px 20px;border-radius:999px;border:1.5px solid var(--border);font-size:.88rem;font-weight:600;
  color:var(--text-muted);transition:all .2s ease;
}
.filter-tab:hover{border-color:var(--cyan-500);color:var(--cyan-700)}
.filter-tab.active{background:var(--navy-900);border-color:var(--navy-900);color:#fff}

.portfolio-hero-icon{
  width:120px;height:120px;border-radius:32px;display:flex;align-items:center;justify-content:center;color:#fff;
  box-shadow:var(--shadow-lg);
}
.portfolio-hero-icon svg{width:56px;height:56px}
.portfolio-detail-body ul{margin:18px 0;display:grid;gap:12px}
.portfolio-detail-body li{
  position:relative;padding-left:30px;color:var(--text);font-size:.98rem;
}
.portfolio-detail-body li::before{
  content:'';position:absolute;left:0;top:7px;width:16px;height:16px;border-radius:6px;background:var(--grad-accent);
}
.portfolio-detail-body p{margin-bottom:16px;color:var(--text-muted)}

/* ---------- Blog ---------- */
.blog-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .3s ease,box-shadow .3s ease}
.blog-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.blog-cover{height:170px;background:var(--grad-primary);position:relative;overflow:hidden}
.blog-cover svg{position:absolute;opacity:.5}
.blog-body{padding:26px}
.blog-date{font-size:.76rem;color:var(--cyan-700);font-weight:700;letter-spacing:.05em;text-transform:uppercase;margin-bottom:10px;display:block}
.blog-body h3{font-size:1.08rem;margin-bottom:10px}
.blog-body p{color:var(--text-muted);font-size:.9rem;margin-bottom:16px}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:50px}
.contact-info-card{background:var(--navy-900);color:#fff;border-radius:var(--radius);padding:38px;position:relative;overflow:hidden}
.contact-info-card::after{content:'';position:absolute;inset:0;background:radial-gradient(circle at 90% 90%,rgba(77,214,240,.25),transparent 55%)}
.contact-info-row{display:flex;gap:16px;align-items:flex-start;margin-bottom:24px;position:relative;z-index:1}
.contact-info-row .ci-icon{width:42px;height:42px;border-radius:12px;background:rgba(77,214,240,.15);color:var(--cyan-300);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.contact-info-row .ci-icon svg{width:20px;height:20px}
.contact-info-row b{display:block;font-size:.78rem;color:rgba(255,255,255,.55);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px}
.contact-info-row span{font-size:.98rem}

.contact-form-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:38px;box-shadow:var(--shadow-sm)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px}
.form-group{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.form-group label{font-size:.85rem;font-weight:600;color:var(--navy-900)}
.form-group input,.form-group textarea{
  padding:13px 16px;border-radius:12px;border:1.5px solid var(--border);background:var(--bg);
  transition:border-color .2s ease,background .2s ease;
}
.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--cyan-500);background:#fff}
.form-msg{margin-top:16px;font-size:.9rem;padding:12px 16px;border-radius:10px;display:none}
.form-msg.success{display:block;background:rgba(34,193,110,.1);color:#0e9f5f}
.form-msg.error{display:block;background:rgba(224,60,60,.1);color:#c0392b}

/* ---------- CTA ---------- */
.cta-panel{
  background:var(--navy-900);border-radius:var(--radius-lg);padding:60px;text-align:center;color:#fff;
  position:relative;overflow:hidden;isolation:isolate;
}
.cta-panel::after{content:'';position:absolute;inset:0;z-index:-1;background:radial-gradient(circle at 20% 20%,rgba(77,214,240,.22),transparent 55%)}
.cta-panel h2{color:#fff;font-size:clamp(1.5rem,3vw,2.1rem);margin-bottom:14px}
.cta-panel p{color:rgba(255,255,255,.72);max-width:520px;margin:0 auto 30px}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-950);color:rgba(255,255,255,.7);padding:70px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand img{height:34px;filter:brightness(0) invert(1)}
.footer-brand span{font-family:'Space Grotesk',sans-serif;font-weight:700;color:#fff;font-size:1.05rem}
.site-footer p{font-size:.9rem;line-height:1.7}
.site-footer h5{color:#fff;font-size:.85rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:18px}
.footer-links li{margin-bottom:12px}
.footer-links a{font-size:.9rem;transition:color .2s ease}
.footer-links a:hover{color:var(--cyan-400)}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{width:38px;height:38px;border-radius:999px;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;transition:background .2s ease}
.footer-social a:hover{background:var(--cyan-600)}
.footer-social svg{width:17px;height:17px}
.footer-bottom{padding-top:26px;display:flex;justify-content:space-between;align-items:center;font-size:.82rem;flex-wrap:wrap;gap:10px}

/* ---------- Page hero (inner pages) ---------- */
.page-hero{
  padding:calc(var(--header-h) + 70px) 0 80px;background:var(--grad-primary);color:#fff;position:relative;overflow:hidden;isolation:isolate;
}
.page-hero::after{content:'';position:absolute;inset:0;z-index:-1;background:radial-gradient(circle at 85% 15%,rgba(77,214,240,.25),transparent 55%)}
.page-hero h1{color:#fff;font-size:clamp(1.9rem,3.6vw,2.7rem);margin:16px 0 16px}
.page-hero p{color:rgba(255,255,255,.75);max-width:640px;font-size:1.05rem}
.breadcrumb{display:flex;gap:8px;align-items:center;font-size:.85rem;color:rgba(255,255,255,.6);margin-bottom:18px}
.breadcrumb a:hover{color:var(--cyan-300)}

/* ---------- Testimonial / quote-like blocks not used broadly, kept minimal ---------- */

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{height:320px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .ai-panel-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}

  .main-nav{
    position:fixed;top:var(--header-h);left:0;right:0;bottom:0;background:#fff;
    flex-direction:column;align-items:stretch;padding:20px;gap:4px;
    transform:translateY(-110%);opacity:0;transition:transform .3s ease,opacity .3s ease;overflow-y:auto;
  }
  .main-nav.open{transform:translateY(0);opacity:1}
  .nav-link{padding:14px 16px;font-size:1rem}
  .site-header.on-dark .main-nav.open .nav-link{color:var(--text)}
  .site-header.on-dark .main-nav.open .nav-link:hover,
  .site-header.on-dark .main-nav.open .nav-link.active{background:rgba(23,166,196,.1);color:var(--cyan-700)}
  .nav-toggle{display:flex}
}
@media (max-width:860px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .stats-bar{grid-template-columns:repeat(2,1fr);gap:24px}
  .stats-bar .stat:nth-child(2){border-right:none}
}
@media (max-width:760px){
  .header-actions .btn{display:none}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .grid-3,.grid-2,.grid-4{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .ai-panel{padding:44px 26px}
  .cta-panel{padding:44px 26px}
  .stats-bar{margin-top:-50px}
}