/* ============================================================
   SAGITAL BİLİŞİM TEKNOLOJİLERİ — style.css
   ============================================================ */
:root{
  --ink:        #0F2440;
  --ink-soft:   #4A6285;
  --bg:         #FFFFFF;
  --bg-tint:    #E3F2FD;
  --sky:        #90CAF9;
  --accent:     #1E88E5;
  --accent-deep:#1565C0;
  --line:       #D6E7F7;
  --radius:     14px;
  --font-display:'Space Grotesk',system-ui,sans-serif;
  --font-body:  'Inter',system-ui,sans-serif;
  --maxw:       1160px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{padding:96px 0}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.15;letter-spacing:-0.02em}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
.section-title{font-size:clamp(1.8rem,3.5vw,2.5rem);font-weight:600;margin-bottom:18px}
.section-lead{color:var(--ink-soft);max-width:660px;font-size:1.05rem}

/* ---------- Header ---------- */
header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--font-display);font-weight:700;font-size:1.05rem;letter-spacing:-.01em}
.brand svg{width:40px;height:40px;border-radius:10px;box-shadow:0 4px 12px rgba(30,136,229,.28)}
.brand small{display:block;font-family:var(--font-body);font-weight:500;font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft)}
.nav-links{display:flex;gap:24px;list-style:none}
.nav-links a{font-size:.9rem;font-weight:500;color:var(--ink-soft);transition:color .2s;white-space:nowrap}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--accent)}
.nav-right{display:flex;align-items:center;gap:14px}

/* Dil değiştirici */
.lang-switch{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:var(--bg-tint)}
.lang-switch button{border:0;background:transparent;font:inherit;font-size:.8rem;font-weight:600;padding:7px 14px;cursor:pointer;color:var(--ink-soft);transition:.2s}
.lang-switch button.active{background:var(--accent);color:#fff}
.lang-switch button:focus-visible{outline:2px solid var(--accent-deep);outline-offset:-2px}

/* Mobil menü */
.hamburger{display:none;border:0;background:none;cursor:pointer;padding:8px}
.hamburger span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;transition:.25s}
@media(max-width:1000px){
  .nav-links{position:fixed;inset:72px 0 auto 0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--line);max-height:0;overflow:hidden;transition:max-height .3s ease}
  .nav-links.open{max-height:440px}
  .nav-links li{border-top:1px solid var(--line)}
  .nav-links a{display:block;padding:16px 24px}
  .hamburger{display:block}
}

/* ---------- Hero ---------- */
#hero{padding:160px 0 80px;background:linear-gradient(180deg,var(--bg-tint) 0%,#fff 90%)}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.hero-title{font-size:clamp(2.1rem,4.6vw,3.3rem);font-weight:700;margin-bottom:20px}
.hero-title em{font-style:normal;color:var(--accent)}
.hero-sub{color:var(--ink-soft);font-size:1.1rem;max-width:540px;margin-bottom:32px}
.btn{display:inline-block;font-weight:600;font-size:.95rem;padding:14px 28px;border-radius:999px;transition:.2s;cursor:pointer;border:0;font-family:var(--font-body)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 24px rgba(30,136,229,.25)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-2px)}
.btn-ghost{color:var(--accent);border:1px solid var(--sky);margin-left:12px;background:#fff}
.btn-ghost:hover{background:var(--bg-tint)}

/* İmza öğe: canlı "görüntü analizi" çerçevesi */
.vision-frame{position:relative;aspect-ratio:4/3;border-radius:var(--radius);overflow:hidden;background:#0F2440;box-shadow:0 24px 60px rgba(15,36,64,.25)}
.vision-frame>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.vision-grid{position:absolute;inset:0;background-image:
  linear-gradient(rgba(144,202,249,.1) 1px,transparent 1px),
  linear-gradient(90deg,rgba(144,202,249,.1) 1px,transparent 1px);
  background-size:36px 36px}
.scanline{position:absolute;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,#90CAF9,transparent);box-shadow:0 0 18px 4px rgba(144,202,249,.5);animation:scan 4.5s ease-in-out infinite}
@keyframes scan{0%,100%{top:8%}50%{top:88%}}
@media(prefers-reduced-motion:reduce){
  .scanline{animation:none;top:40%}
  html{scroll-behavior:auto}
}

/* İstatistik bandı */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.stats .container{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-top:36px;padding-bottom:36px}
.stat{text-align:center}
.stat b{display:block;font-family:var(--font-display);font-size:2rem;font-weight:700;color:var(--accent-deep)}
.stat span{font-size:.85rem;color:var(--ink-soft)}

/* ---------- Hakkımızda ---------- */
#about{background:#fff;padding-bottom:72px}
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start}
.about-points{display:grid;gap:20px;margin-top:8px}
.about-point{display:flex;gap:14px;align-items:flex-start}
.about-point .dot{flex:none;width:38px;height:38px;border-radius:10px;background:var(--bg-tint);display:grid;place-items:center;color:var(--accent)}
.about-point h3{font-size:1rem;margin-bottom:2px}
.about-point p{color:var(--ink-soft);font-size:.93rem}
.mv-cards{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:56px}
.mv-card{background:var(--bg-tint);border-radius:var(--radius);padding:32px 28px}
.mv-card h3{font-size:1.1rem;margin-bottom:10px;display:flex;align-items:center;gap:10px;color:var(--accent-deep)}
.mv-card p{color:var(--ink-soft);font-size:.95rem}

/* ---------- Hizmetler ---------- */
#services{background:linear-gradient(180deg,#fff 0%,var(--bg-tint) 100%)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:0;overflow:hidden;transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(30,136,229,.14)}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--line)}
.card .card-body{padding:26px 26px 28px;display:flex;flex-direction:column;gap:10px;flex:1}
.card h3{font-size:1.12rem}
.card p{color:var(--ink-soft);font-size:.93rem;flex:1}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{font-size:.72rem;font-weight:600;color:var(--accent-deep);background:var(--bg-tint);border-radius:999px;padding:4px 12px}
.cards.secondary{grid-template-columns:repeat(3,1fr);margin-top:24px}
.card.small{padding:28px 26px;flex-direction:row;gap:18px;align-items:flex-start}
.card.small .icon{flex:none;width:48px;height:48px;border-radius:12px;background:var(--bg-tint);display:grid;place-items:center;color:var(--accent)}
.card.small h3{font-size:1.02rem;margin-bottom:6px}
.card.small p{font-size:.88rem}

/* ---------- Görüntü Analizi Vitrini ---------- */
#vision{background:#0F2440;color:#DCEAF9}
#vision .eyebrow{color:#90CAF9}
#vision .section-title{color:#fff}
#vision .section-lead{color:#9FB6D4}
.vision-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-top:44px}
.vision-shot{border-radius:var(--radius);overflow:hidden;box-shadow:0 24px 60px rgba(0,0,0,.35)}
.usecases{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.usecase{background:#132E52;border:1px solid #1B3B66;border-radius:12px;padding:20px}
.usecase h4{font-size:.95rem;color:#fff;margin-bottom:6px;display:flex;align-items:center;gap:8px}
.usecase h4 svg{color:#90CAF9;flex:none}
.usecase p{font-size:.83rem;color:#9FB6D4}
.checklist{list-style:none;margin-top:26px;display:grid;gap:12px}
.checklist li{display:flex;gap:10px;align-items:flex-start;font-size:.92rem;color:#C6D9EF}
.checklist svg{flex:none;color:#64FFDA;margin-top:3px}

/* ---------- Süreç ---------- */
#process{background:#fff}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:44px}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px}
.step .num{font-family:var(--font-display);font-size:.85rem;font-weight:700;color:var(--accent);background:var(--bg-tint);width:36px;height:36px;border-radius:10px;display:grid;place-items:center;margin-bottom:16px}
.step h3{font-size:1.02rem;margin-bottom:8px}
.step p{color:var(--ink-soft);font-size:.88rem}
.step::after{content:"";position:absolute;top:44px;right:-24px;width:24px;border-top:2px dashed var(--sky)}
.step:last-child::after{display:none}

/* ---------- Teknolojiler ---------- */
#tech{background:linear-gradient(180deg,#fff 0%,var(--bg-tint) 100%)}
.tech-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:44px}
.tech{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 16px;text-align:center;transition:.2s}
.tech:hover{border-color:var(--sky)}
.tech svg{margin:0 auto 12px;color:var(--accent)}
.tech span{font-size:.88rem;font-weight:600;color:var(--ink)}
.tech small{display:block;font-size:.72rem;color:var(--ink-soft);margin-top:2px}

/* ---------- İletişim ---------- */
#contact{background:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:56px;margin-top:44px}
.contact-info{display:grid;gap:22px;align-content:start}
.contact-item{display:flex;gap:14px;align-items:flex-start;color:var(--ink-soft);font-size:.95rem}
.contact-item svg{flex:none;color:var(--accent);margin-top:2px}
.contact-item b{display:block;color:var(--ink);font-size:.85rem;font-weight:600}
form{background:var(--bg-tint);border:1px solid var(--line);border-radius:var(--radius);padding:32px;display:grid;gap:18px}
label{font-size:.85rem;font-weight:600}
input,textarea{width:100%;font:inherit;font-size:.95rem;padding:12px 14px;border:1px solid var(--line);border-radius:10px;margin-top:6px;transition:border-color .2s;background:#fff;color:var(--ink)}
input:focus,textarea:focus{outline:none;border-color:var(--accent)}
textarea{resize:vertical;min-height:120px}
.field-error{color:#C62828;font-size:.78rem;margin-top:4px;display:none}
.field.invalid input,.field.invalid textarea{border-color:#C62828}
.field.invalid .field-error{display:block}
.form-success{display:none;background:#E8F5E9;color:#1B5E20;border:1px solid #A5D6A7;border-radius:10px;padding:14px;font-size:.9rem}
.form-error{display:none;background:#FDECEA;color:#B71C1C;border:1px solid #EF9A9A;border-radius:10px;padding:14px;font-size:.9rem}
.hp{position:absolute;left:-9999px;top:-9999px;height:0;overflow:hidden}
button[disabled]{opacity:.6;cursor:not-allowed;transform:none!important}
.contact-item a,.footer-contact a{color:inherit;transition:color .2s}
.contact-item a:hover{color:var(--accent)}
.footer-contact a:hover{color:#90CAF9}

/* ---------- Footer ---------- */
footer{background:var(--ink);color:#B7CBE4}
.footer-cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 48px}
.footer-cols h4{color:#fff;font-size:.95rem;margin-bottom:16px}
.footer-cols ul{list-style:none;display:grid;gap:10px}
.footer-cols a{font-size:.88rem;color:#9FB6D4;transition:color .2s}
.footer-cols a:hover{color:#90CAF9}
.footer-brand{display:flex;align-items:center;gap:12px;font-family:var(--font-display);font-weight:700;color:#fff;margin-bottom:16px}
.footer-brand svg{width:36px;height:36px;border-radius:9px}
.footer-blurb{font-size:.88rem;color:#9FB6D4;max-width:280px}
.footer-contact li{display:flex;gap:10px;font-size:.88rem;color:#9FB6D4;align-items:flex-start}
.footer-contact svg{flex:none;color:#90CAF9;margin-top:3px}
.footer-bottom{border-top:1px solid rgba(144,202,249,.15);padding:22px 0}
.footer-row{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.footer-row p{font-size:.85rem}

/* ---------- Responsive ---------- */
@media(max-width:1000px){
  .hero-grid,.about-grid,.contact-grid,.vision-grid-2{grid-template-columns:1fr}
  .cards,.cards.secondary{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .step::after{display:none}
  .tech-row{grid-template-columns:repeat(2,1fr)}
  .stats .container{grid-template-columns:repeat(2,1fr)}
  .mv-cards{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr 1fr}
  section{padding:72px 0}
  #hero{padding:140px 0 64px}
}
@media(max-width:560px){
  .usecases{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr}
}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent-deep);outline-offset:2px}