/* ===================================================================
   Teknobil Bilişim Hizmetleri · site.css
   Inspired by beyaz.net — white corporate, bordo accent (≤5%)
   =================================================================== */

/* RESET & TOKENS */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;padding:0;
  font-family:'Inter','Segoe UI',-apple-system,BlinkMacSystemFont,Arial,sans-serif;
  font-size:15px;line-height:1.65;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:transparent;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:600;letter-spacing:-0.015em;line-height:1.2}
p{margin:0}

:root{
  /* Palette */
  --bg:#ffffff;
  --bg-soft:#f8f8f8;
  --bg-tint:#f2f2f2;
  --ink:#0a0a0a;
  --ink-2:#1a1a1a;
  --text:#5a5a5a;
  --text-soft:#7b818c;
  --line:#e7e7e7;
  --line-soft:#f1f1f1;
  /* Single accent — bordo, used <5% of page */
  --acc:#8b1c2b;
  --acc-2:#6b1521;
  --acc-soft:#fbf4f5;
  --acc-glow:rgba(139,28,43,0.12);
  /* Layout */
  --container:1200px;
  --radius:6px;
}

/* CONTAINER */
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

/* ===== TOP UTILITY BAR ===== */
.utility{
  background:var(--bg-tint);
  border-bottom:1px solid var(--line);
  font-size:13px;color:var(--text-soft);
}
.utility .container{
  display:flex;justify-content:space-between;align-items:center;
  padding-top:9px;padding-bottom:9px;
  gap:16px;flex-wrap:wrap;
}
.utility a{color:var(--text-soft);transition:color .15s}
.utility a:hover{color:var(--acc)}
.utility .left{display:flex;gap:18px;align-items:center}
.utility .right{display:flex;gap:18px;align-items:center}
.utility .sep{color:var(--line);display:inline-block}

/* ===== HEADER / NAV ===== */
.header{
  background:var(--bg);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:50;
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:74px;gap:24px;
}
.brand{display:flex;align-items:center;flex-shrink:0}
.brand img{height:42px;width:auto}
.nav{display:flex;gap:4px}
.nav a{
  font-size:14.5px;color:var(--ink-2);font-weight:500;
  padding:10px 14px;border-radius:4px;transition:all .15s;
  letter-spacing:0.01em;
}
.nav a:hover{color:var(--acc);background:var(--acc-soft)}
.nav a.active,.nav a[aria-current="page"]{color:var(--acc)}
.header-cta{display:flex;align-items:center;gap:10px;flex-shrink:0}

/* ===== BUTTONS ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius);
  font-family:inherit;font-size:14px;font-weight:600;
  letter-spacing:0.01em;line-height:1.2;
  transition:all .18s;border:1px solid transparent;
  white-space:nowrap;cursor:pointer;text-decoration:none;
}
.btn-primary{background:var(--acc);color:#fff;border-color:var(--acc)}
.btn-primary:hover{background:var(--acc-2);border-color:var(--acc-2)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink)}
.btn-link{
  background:transparent;color:var(--ink);padding:11px 4px;
  border-bottom:1px solid transparent;border-radius:0;
}
.btn-link:hover{color:var(--acc);border-bottom-color:var(--acc)}
.btn-link::after{content:" →"}
.btn-lg{padding:13px 26px;font-size:15px}

/* ===== EYEBROW / SECTION TITLE ===== */
.eyebrow{
  display:inline-block;
  font-size:12px;font-weight:600;letter-spacing:0.18em;
  text-transform:uppercase;color:var(--acc);
  margin-bottom:12px;
}
.title-bar{
  border-left:4px solid var(--acc);
  padding-left:14px;
  margin-bottom:14px;
}
.title-bar h2{font-size:28px;font-weight:600;color:var(--ink);letter-spacing:-0.015em}

/* ===== MOBILE NAV TOGGLE ===== */
.nav-toggle{
  display:none;flex-direction:column;gap:5px;padding:9px;
  border:1px solid var(--line);border-radius:4px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);transition:.2s}

/* ===== HERO ===== */
.hero{padding:64px 0 80px}
.hero-grid{
  display:grid;grid-template-columns:1.1fr 1fr;
  gap:60px;align-items:center;
}
.hero-text{max-width:560px}
.hero h1{
  font-size:clamp(32px,4vw,44px);
  font-weight:700;color:var(--ink);
  letter-spacing:-0.022em;line-height:1.15;
  margin-bottom:20px;
}
.hero p{
  font-size:17px;color:var(--text);line-height:1.65;
  margin-bottom:32px;
}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-photo{
  position:relative;
  border-radius:8px;overflow:hidden;
  box-shadow:0 14px 36px -16px rgba(10,10,10,0.16);
  aspect-ratio:4/3;
  background:var(--bg-soft);
}
.hero-photo img{width:100%;height:100%;object-fit:cover}

/* ===== SECTION ===== */
.section{padding:80px 0}
.section-alt{background:var(--bg-soft)}
.section-head{margin-bottom:48px;max-width:680px}
.section-head h2{
  font-size:clamp(24px,2.6vw,32px);font-weight:600;color:var(--ink);
  letter-spacing:-0.015em;margin-bottom:12px;line-height:1.2;
}
.section-head p{font-size:16px;color:var(--text);line-height:1.6}

/* ===== SERVICES GRID (6 cards) ===== */
.services{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.svc-card{
  background:#fff;border:1px solid var(--line);border-radius:8px;
  padding:32px 26px;transition:all .2s;display:block;color:inherit;
  position:relative;
}
.svc-card:hover{
  border-color:var(--acc);
  box-shadow:0 12px 30px -14px rgba(139,28,43,0.18);
  transform:translateY(-3px);
}
.svc-card .icon{
  width:52px;height:52px;
  background:var(--acc-soft);color:var(--acc);
  border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:20px;
}
.svc-card h3{
  font-size:18px;font-weight:600;color:var(--ink);
  margin-bottom:10px;letter-spacing:-0.01em;
}
.svc-card p{font-size:14.5px;color:var(--text);line-height:1.6;margin-bottom:18px}
.svc-card .more{
  font-size:13.5px;font-weight:600;color:var(--acc);
  display:inline-flex;align-items:center;gap:6px;
}
.svc-card .more::after{content:"→";transition:transform .15s}
.svc-card:hover .more::after{transform:translateX(3px)}

/* ===== WHY (3 differentiators) ===== */
.why-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:32px;
}
.why-item{padding:0 4px}
.why-item .icon{
  width:48px;height:48px;
  background:#fff;color:var(--acc);
  border:1px solid var(--line);border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;
}
.why-item h3{
  font-size:17px;font-weight:600;color:var(--ink);
  margin-bottom:8px;letter-spacing:-0.01em;
}
.why-item p{font-size:14.5px;color:var(--text);line-height:1.6}

/* ===== CTA STRIP ===== */
.cta{
  padding:48px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.cta .container{
  display:flex;justify-content:space-between;align-items:center;
  gap:24px;flex-wrap:wrap;
}
.cta h3{
  font-size:22px;font-weight:600;color:var(--ink);
  letter-spacing:-0.015em;margin:0;
}
.cta-actions{display:flex;gap:10px;flex-wrap:wrap}

/* ===== FOOTER ===== */
.footer{
  background:var(--bg-tint);
  padding-top:56px;color:var(--text);font-size:14px;
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;padding-bottom:48px;
}
.footer-brand img{height:38px;margin-bottom:16px}
.footer-brand p{font-size:13.5px;color:var(--text);line-height:1.65;margin-bottom:14px;max-width:280px}
.footer h4{
  font-size:13px;font-weight:600;color:var(--ink);
  text-transform:uppercase;letter-spacing:0.12em;margin-bottom:18px;
}
.footer ul li{margin-bottom:10px}
.footer ul li a{font-size:14px;color:var(--text);transition:color .15s}
.footer ul li a:hover{color:var(--acc)}
.footer address{font-style:normal;line-height:1.7;color:var(--text);margin-bottom:10px}
.footer .foot-link{display:block;color:var(--text);margin-bottom:6px;transition:color .15s}
.footer .foot-link:hover{color:var(--acc)}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0;
  display:flex;justify-content:space-between;align-items:center;
  gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-soft);
}
.footer-bottom .links{display:flex;gap:18px}
.footer-bottom a{color:var(--text-soft);transition:color .15s}
.footer-bottom a:hover{color:var(--acc)}

/* ===== PAGE HERO (inner pages) ===== */
.page-hero{
  padding:48px 0 32px;
  border-bottom:1px solid var(--line);
  background:var(--bg);
}
.breadcrumb{
  font-size:13px;color:var(--text-soft);margin-bottom:16px;
}
.breadcrumb a{color:var(--text-soft);transition:color .15s}
.breadcrumb a:hover{color:var(--acc)}
.breadcrumb .sep{margin:0 8px;color:var(--line)}
.page-hero h1{
  font-size:clamp(28px,3.4vw,38px);font-weight:600;color:var(--ink);
  letter-spacing:-0.018em;line-height:1.2;margin-bottom:12px;
}
.page-hero p.lead{
  font-size:16px;color:var(--text);line-height:1.65;max-width:720px;
}

/* ===== CONTENT (inner page body) ===== */
.content{padding:48px 0 64px}
.content-grid{
  display:grid;grid-template-columns:1fr 320px;gap:56px;align-items:start;
}
.content-body h2{
  font-size:22px;font-weight:600;color:var(--ink);
  margin:32px 0 14px;letter-spacing:-0.015em;
}
.content-body h2:first-child{margin-top:0}
.content-body h3{
  font-size:17px;font-weight:600;color:var(--ink);
  margin:24px 0 10px;
}
.content-body p{
  font-size:15.5px;color:var(--text);line-height:1.7;margin-bottom:14px;
}
.content-body ul{margin:14px 0 18px}
.content-body ul li{
  padding:8px 0 8px 20px;position:relative;
  color:var(--text);font-size:15px;line-height:1.6;
  border-bottom:1px solid var(--line-soft);
}
.content-body ul li:last-child{border-bottom:0}
.content-body ul li::before{
  content:"";position:absolute;left:4px;top:18px;
  width:6px;height:6px;background:var(--acc);border-radius:50%;
}
.content-body strong{color:var(--ink);font-weight:600}

.content-aside{
  position:sticky;top:90px;
  background:var(--bg-soft);border:1px solid var(--line);
  border-radius:8px;padding:26px 24px;
}
.aside-stat{padding:14px 0;border-bottom:1px solid var(--line)}
.aside-stat:last-of-type{border-bottom:0}
.aside-stat .num{
  display:block;font-size:24px;font-weight:700;color:var(--ink);
  letter-spacing:-0.02em;line-height:1;margin-bottom:5px;
}
.aside-stat .lbl{display:block;font-size:13px;color:var(--text);line-height:1.4}
.content-aside h4{
  font-size:12.5px;font-weight:600;color:var(--text-soft);
  text-transform:uppercase;letter-spacing:0.14em;margin-bottom:12px;
}
.content-aside .btn{width:100%;margin-top:18px}

/* ===== REFERENCES GRID ===== */
.ref-grid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:14px;
}
.ref-cell{
  background:#fff;border:1px solid var(--line);border-radius:6px;
  aspect-ratio:3/2;display:flex;align-items:center;justify-content:center;
  padding:18px;transition:all .2s;
}
.ref-cell:hover{border-color:var(--acc);box-shadow:0 6px 16px -8px rgba(10,10,10,0.1)}
.ref-cell img{
  max-width:100%;max-height:64px;
  filter:grayscale(100%);opacity:0.7;
  transition:all .25s;
}
.ref-cell:hover img{filter:none;opacity:1}

/* ===== CONTACT (iletisim page) ===== */
.contact-grid{
  display:grid;grid-template-columns:1fr 1.2fr;gap:48px;
}
.contact-info{
  background:var(--bg-soft);border:1px solid var(--line);
  border-radius:8px;padding:32px 28px;
}
.contact-row{padding:18px 0;border-bottom:1px solid var(--line)}
.contact-row:first-child{padding-top:0}
.contact-row:last-child{border-bottom:0;padding-bottom:0}
.contact-row .lbl{
  display:block;font-size:11.5px;font-weight:600;color:var(--text-soft);
  text-transform:uppercase;letter-spacing:0.14em;margin-bottom:7px;
}
.contact-row .val{
  display:block;font-size:15.5px;color:var(--ink);font-weight:500;
}
.contact-row .val a{color:var(--ink);transition:color .15s}
.contact-row .val a:hover{color:var(--acc)}
.contact-row .sml{display:block;font-size:13px;color:var(--text);margin-top:4px}
.contact-row .socials{display:flex;gap:14px;margin-top:6px;flex-wrap:wrap}
.contact-row .socials a{
  font-size:14px;color:var(--ink);font-weight:500;
  border-bottom:1px solid var(--line);padding-bottom:2px;transition:all .15s;
}
.contact-row .socials a:hover{color:var(--acc);border-color:var(--acc)}

.contact-form{
  background:#fff;border:1px solid var(--line);border-radius:8px;
  padding:32px 28px;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.form-row.single{grid-template-columns:1fr}
.form-field label{
  display:block;font-size:12px;font-weight:600;color:var(--text-soft);
  text-transform:uppercase;letter-spacing:0.1em;margin-bottom:7px;
}
.form-field input,.form-field textarea{
  width:100%;padding:11px 14px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  font-family:inherit;font-size:14.5px;color:var(--ink);
  transition:border-color .15s,box-shadow .15s;
}
.form-field input:focus,.form-field textarea:focus{
  outline:none;border-color:var(--acc);box-shadow:0 0 0 3px var(--acc-glow);
}
.form-field textarea{min-height:140px;resize:vertical}
.form-actions{margin-top:6px}
.form-actions .btn{width:100%}
.form-note{
  text-align:center;font-size:12.5px;color:var(--text-soft);
  margin-top:12px;line-height:1.55;
}
.form-note a{color:var(--acc)}

/* ===== 404 ===== */
.error-page{
  padding:100px 24px;text-align:center;background:var(--bg);
}
.error-code{
  font-size:clamp(80px,12vw,140px);font-weight:700;color:var(--acc);
  letter-spacing:-0.04em;line-height:1;margin-bottom:18px;
}
.error-page h1{
  font-size:24px;font-weight:600;color:var(--ink);
  letter-spacing:-0.015em;margin-bottom:12px;
}
.error-page p{
  font-size:15.5px;color:var(--text);max-width:480px;margin:0 auto 26px;
  line-height:1.6;
}
.error-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ===== RESPONSIVE ===== */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-photo{max-width:520px;margin:0 auto}
  .services,.why-grid{grid-template-columns:repeat(2,1fr)}
  .content-grid{grid-template-columns:1fr;gap:36px}
  .content-aside{position:static;max-width:520px}
  .ref-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .contact-grid{grid-template-columns:1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .nav{display:none}
  .nav-toggle{display:flex}
  .nav.open{
    display:flex;flex-direction:column;gap:0;
    position:absolute;top:74px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);
    padding:8px 18px 16px;
  }
  .nav.open a{padding:12px 4px;border-bottom:1px solid var(--line-soft);border-radius:0}
  .nav.open a:last-child{border-bottom:0}
  .header-cta .btn-primary{display:none}
  .utility{font-size:12px}
  .utility .left span:not(:first-child){display:none}
  .hero{padding:40px 0 56px}
  .hero h1{font-size:28px}
  .hero p{font-size:15px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .services,.why-grid{grid-template-columns:1fr;gap:16px}
  .ref-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
  .cta .container{flex-direction:column;align-items:flex-start}
  .form-row{grid-template-columns:1fr}
  .contact-info,.contact-form,.content-aside{padding:24px 20px}
  .error-page{padding:64px 18px}
}