:root{
  --ink:#0b1d3a;
  --muted:#5b6b82;
  --bg:#f7fafc;
  --card:#ffffff;
  --pri:#1f4aa8;
  --pri-ink:#fff;
  --footer:#0c1220;
  --header:#0c1220;
  --border:#e5e7eb;
}

*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,Segoe UI,Roboto,Helvetica,Arial}
.container{max-width:1100px;margin:0 auto;padding:0 16px}

.site-header{background:var(--header);color:#fff;position:sticky;top:0;z-index:10}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 0}
.brand{display:flex;align-items:center;gap:8px;color:#fff;text-decoration:none}
.brand img{width:200px;height:50px;border-radius:8px;object-fit:cover}
.burger{display:none;background:none;border:1px solid #2a3555;color:#fff;border-radius:8px;padding:8px 12px}
.nav{display:flex;gap:16px;align-items:center}
.nav a{color:#fff;text-decoration:none;opacity:.9}
.nav a:hover{opacity:1}
.nav .btn{background:var(--pri);color:var(--pri-ink);padding:8px 12px;border-radius:10px}
.nav .lang a{opacity:.8;padding:0 4px}

.hero{padding:56px 0;background:linear-gradient(180deg,#ffffff, #eef3ff)}
.hero h1{font-size:32px;margin:0 0 8px}
.hero p{max-width:760px;color:var(--muted)}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px}
.card h3{margin:0 0 8px}

.section{padding:48px 0}
.section h2{margin:0 0 16px}

.form{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.form .full{grid-column:1 / -1}
input,select,textarea{width:100%;padding:10px;border:1px solid var(--border);border-radius:10px;background:#fff}
button.btn{background:var(--pri);color:#fff;border:0;border-radius:10px;padding:12px 16px;cursor:pointer}
button.btn:hover{filter:brightness(.95)}

.site-footer{background:var(--footer);color:#c9d3f5;padding:20px 0;margin-top:40px}

@media (max-width:900px){
  .grid{grid-template-columns:1fr}
  .form{grid-template-columns:1fr}
  .burger{display:block}
  .nav{display:none;flex-direction:column;align-items:flex-start;background:#121a33;position:absolute;right:16px;top:64px;padding:12px;border:1px solid #243055;border-radius:12px}
  .nav.show{display:flex}
}
/* Buton sırası */
.btn-row{display:flex;gap:10px;flex-wrap:wrap}

/* Temel buton */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 16px;border-radius:12px;border:1px solid transparent;
  text-decoration:none;font-weight:600;transition:transform .06s ease, box-shadow .2s ease, filter .2s ease
}
.btn:active{transform:translateY(1px)}

/* Birincil */
.btn-primary{background:var(--pri);color:#fff;box-shadow:0 6px 18px rgba(31,74,168,.18)}
.btn-primary:hover{filter:brightness(.95)}

/* İkincil (outline) */
.btn-outline{
  background:#fff;color:var(--pri);border-color:var(--pri);
  box-shadow:0 4px 14px rgba(31,74,168,.10)
}
.btn-outline:hover{background:#f3f6ff}