/* Duru Bilgisayar Sistemleri — bespoke theme */
:root{
  --navy:#0b1b3b;--navy-2:#0f2552;--cyan:#16c8e6;--cyan-d:#0e9fba;
  --ink:#1a2236;--muted:#5b6783;--line:#e6eaf2;--bg:#f6f8fc;--white:#fff;
  --shadow:0 18px 50px -20px rgba(11,27,59,.28);--radius:16px;
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--white);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:'Poppins','Inter',sans-serif;line-height:1.2;color:var(--navy);font-weight:700}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.btn{display:inline-flex;align-items:center;gap:.5rem;font-weight:600;font-size:.97rem;padding:.85rem 1.6rem;border-radius:50px;transition:.25s;cursor:pointer;border:0}
.btn-primary{background:linear-gradient(135deg,var(--cyan),var(--cyan-d));color:#04141c;box-shadow:0 12px 28px -10px rgba(22,200,230,.7)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px -10px rgba(22,200,230,.85)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--navy-2);transform:translateY(-2px)}
.eyebrow{display:inline-block;font-weight:700;letter-spacing:.14em;text-transform:uppercase;font-size:.76rem;color:var(--cyan-d);margin-bottom:.7rem}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:.65rem;font-family:'Poppins',sans-serif;font-weight:800;font-size:1.22rem;color:var(--navy)}
.brand .logo{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,var(--navy),var(--navy-2));display:grid;place-items:center;color:var(--cyan);font-size:1.25rem;box-shadow:var(--shadow)}
.brand span{color:var(--cyan-d)}
.nav-links{display:flex;align-items:center;gap:2rem;list-style:none}
.nav-links a{font-weight:500;color:var(--ink);font-size:.97rem;position:relative;transition:.2s}
.nav-links a:hover,.nav-links a.active{color:var(--cyan-d)}
.nav-links a.active::after{content:"";position:absolute;left:0;bottom:-26px;width:100%;height:3px;background:var(--cyan);border-radius:3px}
.nav-cta{display:flex;align-items:center;gap:1rem}
.nav-phone{font-weight:700;color:var(--navy);font-size:.95rem}
.menu-toggle{display:none;background:none;border:0;font-size:1.6rem;color:var(--navy);cursor:pointer}

/* Hero */
.hero{position:relative;color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(8,18,42,.93),rgba(11,27,59,.72) 55%,rgba(14,159,186,.35));z-index:1}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero-inner{position:relative;z-index:2;padding:6.5rem 0 7rem;max-width:680px}
.hero h1{color:#fff;font-size:clamp(2.1rem,5vw,3.5rem);margin-bottom:1.2rem}
.hero h1 b{color:var(--cyan)}
.hero p{font-size:1.13rem;color:#d7e2f4;margin-bottom:2rem;max-width:560px}
.hero-actions{display:flex;gap:1rem;flex-wrap:wrap}
.hero-stats{position:relative;z-index:2;display:flex;gap:2.5rem;flex-wrap:wrap;padding:0 0 3rem}
.hero-stats .stat b{font-family:'Poppins';font-size:2rem;color:var(--cyan);display:block}
.hero-stats .stat span{color:#c4d2ea;font-size:.9rem}

/* Sections */
.section{padding:5.5rem 0}
.section.alt{background:var(--bg)}
.section-head{text-align:center;max-width:680px;margin:0 auto 3.2rem}
.section-head h2{font-size:clamp(1.7rem,3.5vw,2.5rem);margin-bottom:1rem}
.section-head p{color:var(--muted);font-size:1.05rem}

/* Service grid */
.grid{display:grid;gap:1.6rem}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:2rem 1.8rem;transition:.3s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.card .ic{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,rgba(22,200,230,.15),rgba(11,27,59,.08));display:grid;place-items:center;font-size:1.6rem;margin-bottom:1.2rem;color:var(--cyan-d)}
.card h3{font-size:1.22rem;margin-bottom:.6rem}
.card p{color:var(--muted);font-size:.97rem}
.card .more{display:inline-block;margin-top:1rem;color:var(--cyan-d);font-weight:600;font-size:.9rem}

/* Service detail cards w/ image */
.svc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s}
.svc-card:hover{box-shadow:var(--shadow);transform:translateY(-5px)}
.svc-card img{height:200px;width:100%;object-fit:cover}
.svc-card .body{padding:1.7rem}
.svc-card h3{font-size:1.2rem;margin-bottom:.55rem}
.svc-card p{color:var(--muted);font-size:.96rem}
.svc-card ul{list-style:none;margin-top:1rem;display:flex;flex-direction:column;gap:.45rem}
.svc-card li{font-size:.92rem;color:var(--ink);padding-left:1.5rem;position:relative}
.svc-card li::before{content:"\2713";position:absolute;left:0;color:var(--cyan-d);font-weight:800}

/* Feature split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:3.5rem;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;height:100%;object-fit:cover;max-height:440px}
.split h2{font-size:clamp(1.6rem,3vw,2.3rem);margin-bottom:1.2rem}
.feature-list{list-style:none;margin-top:1.5rem;display:flex;flex-direction:column;gap:1.1rem}
.feature-list li{display:flex;gap:1rem;align-items:flex-start}
.feature-list .fic{flex:0 0 auto;width:42px;height:42px;border-radius:11px;background:rgba(22,200,230,.13);color:var(--cyan-d);display:grid;place-items:center;font-size:1.2rem;font-weight:700}
.feature-list h4{font-size:1.05rem;margin-bottom:.2rem}
.feature-list p{color:var(--muted);font-size:.93rem}

/* Stats band */
.stats-band{background:var(--navy);color:#fff;padding:3.5rem 0}
.stats-band .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;text-align:center}
.stats-band b{font-family:'Poppins';font-size:2.6rem;color:var(--cyan);display:block}
.stats-band span{color:#aebfda;font-size:.95rem}

/* CTA band */
.cta-band{position:relative;color:#fff;text-align:center;overflow:hidden;padding:4.5rem 0}
.cta-band::before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(11,27,59,.92),rgba(14,159,186,.55));z-index:1}
.cta-band img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.cta-band .container{position:relative;z-index:2}
.cta-band h2{color:#fff;font-size:clamp(1.7rem,3.5vw,2.4rem);margin-bottom:1rem}
.cta-band p{color:#d7e2f4;max-width:560px;margin:0 auto 2rem;font-size:1.05rem}

/* Page hero (sub-pages) */
.page-hero{background:linear-gradient(120deg,var(--navy),var(--navy-2));color:#fff;padding:4rem 0 3.5rem;text-align:center}
.page-hero h1{color:#fff;font-size:clamp(2rem,4vw,2.9rem);margin-bottom:.7rem}
.page-hero p{color:#c4d2ea;max-width:620px;margin:0 auto}
.crumbs{font-size:.85rem;color:#9fb2d6;margin-bottom:1rem}
.crumbs a:hover{color:var(--cyan)}

/* About values */
.values{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.value{padding:1.8rem;border-radius:var(--radius);background:#fff;border:1px solid var(--line)}
.value .ic{font-size:1.8rem;color:var(--cyan-d);margin-bottom:.8rem}
.value h3{font-size:1.1rem;margin-bottom:.5rem}
.value p{color:var(--muted);font-size:.94rem}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:3rem;align-items:start}
.info-card{display:flex;gap:1rem;align-items:flex-start;margin-bottom:1.8rem}
.info-card .ic{flex:0 0 auto;width:48px;height:48px;border-radius:12px;background:rgba(22,200,230,.13);color:var(--cyan-d);display:grid;place-items:center;font-size:1.3rem}
.info-card h4{font-size:1.02rem;margin-bottom:.15rem}
.info-card p{color:var(--muted);font-size:.95rem}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:2.2rem;box-shadow:var(--shadow)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.field{margin-bottom:1.1rem}
.field label{display:block;font-weight:600;font-size:.88rem;margin-bottom:.4rem;color:var(--navy)}
.field input,.field textarea{width:100%;padding:.8rem 1rem;border:1px solid var(--line);border-radius:10px;font-family:inherit;font-size:.95rem;background:var(--bg);transition:.2s}
.field input:focus,.field textarea:focus{outline:0;border-color:var(--cyan);background:#fff;box-shadow:0 0 0 3px rgba(22,200,230,.15)}
.field textarea{resize:vertical;min-height:120px}
.form-note{font-size:.82rem;color:var(--muted);margin-top:.8rem;text-align:center}

/* Footer */
.site-footer{background:var(--navy);color:#c4d2ea;padding:3.5rem 0 1.5rem}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:2.5rem;margin-bottom:2.5rem}
.site-footer .brand{color:#fff;margin-bottom:1rem}
.site-footer p{font-size:.92rem;color:#9fb2d6;line-height:1.7}
.site-footer h4{color:#fff;font-size:1rem;margin-bottom:1.1rem}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:.6rem}
.footer-links a{font-size:.92rem;color:#9fb2d6;transition:.2s}
.footer-links a:hover{color:var(--cyan)}
.footer-contact li{font-size:.92rem;color:#9fb2d6;margin-bottom:.6rem;display:flex;gap:.6rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:1.5rem;text-align:center;font-size:.85rem;color:#7c8db0}

@media (max-width:900px){
  .nav-links{position:fixed;top:74px;left:0;right:0;background:#fff;flex-direction:column;padding:1.5rem;gap:1.2rem;border-bottom:1px solid var(--line);transform:translateY(-150%);transition:.3s;box-shadow:var(--shadow)}
  .nav-links.open{transform:translateY(0)}
  .nav-links a.active::after{display:none}
  .menu-toggle{display:block}
  .nav-phone{display:none}
  .grid-3,.grid-2,.values,.stats-band .grid-4{grid-template-columns:1fr}
  .split,.contact-grid{grid-template-columns:1fr;gap:2rem}
  .stats-band .grid-4{grid-template-columns:1fr 1fr;gap:2rem}
  .form .row{grid-template-columns:1fr}
}
@media (max-width:560px){.hero-stats{gap:1.5rem}.stats-band .grid-4{grid-template-columns:1fr}}