:root{
  --bg:#f6f8fc; --card:#ffffff; --line:#e5eaf2;
  --text:#0f172a; --text-2:#334155; --muted:#64748b;
  --brand:#0ea5b7; --brand-2:#06b6d4; --brand-3:#22d3ee;
  --accent:#f59e0b;
  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow-lg:0 24px 60px -12px rgba(15,23,42,.15), 0 8px 24px -8px rgba(15,23,42,.08);
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{
  font:15px/1.65 'Plus Jakarta Sans',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  min-height:100dvh;
  display:flex;flex-direction:column;
  background:var(--bg);
}
.bg{position:fixed;inset:0;z-index:-1;overflow:hidden;
  background:
    radial-gradient(1000px 520px at 8% -10%, rgba(34,211,238,.20), transparent 60%),
    radial-gradient(820px 460px at 100% 0%, rgba(251,191,36,.16), transparent 60%),
    radial-gradient(900px 520px at 50% 120%, rgba(14,165,183,.14), transparent 60%),
    linear-gradient(180deg,#f9fbff 0%, #eef3f9 100%);
}
.bg::after{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(15,23,42,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15,23,42,.035) 1px, transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(ellipse at 50% 40%, #000 25%, transparent 75%);
          mask-image:radial-gradient(ellipse at 50% 40%, #000 25%, transparent 75%);
}
.container{max-width:960px;margin:0 auto;padding:22px 20px 12px;width:100%;display:flex;flex-direction:column;flex:1}

/* Nav */
.nav{display:flex;align-items:center;justify-content:space-between;padding:6px 0 22px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;font-size:18px;letter-spacing:-.01em}
.brand-logo{
  width:40px;height:40px;border-radius:13px;display:grid;place-items:center;font-size:20px;
  background:linear-gradient(135deg,#e0f7fa,#b2ebf2);
  box-shadow:inset 0 0 0 1px rgba(6,182,212,.28), 0 6px 14px -6px rgba(6,182,212,.5);
}
.brand-name span{color:var(--brand)}
.back{
  display:inline-flex;align-items:center;gap:7px;padding:8px 14px;border-radius:999px;
  background:#fff;border:1px solid var(--line);color:var(--text-2);
  font-size:13px;font-weight:600;text-decoration:none;box-shadow:var(--shadow-sm);
  transition:border-color .15s,color .15s,transform .12s;
}
.back:hover{border-color:var(--brand-3);color:var(--brand);transform:translateX(-2px)}

/* Hero */
.page-head{padding:8px 0 22px;animation:fadeUp .5s ease both}
.eyebrow{
  display:inline-block;padding:6px 13px;border-radius:999px;
  background:linear-gradient(135deg,#ecfeff,#e0f2fe);border:1px solid #cffafe;
  color:var(--brand);font-size:12px;font-weight:700;letter-spacing:.06em;
  text-transform:uppercase;margin-bottom:14px;
}
.page-head h1{
  font-size:clamp(26px,3.6vw,38px);line-height:1.15;letter-spacing:-.022em;
  margin:0 0 10px;font-weight:800;
}
.grad{
  background:linear-gradient(120deg,#0891b2 0%,#06b6d4 45%,#f59e0b 120%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.page-head p{color:var(--muted);font-size:15.5px;margin:0;max-width:62ch}
.meta{font-size:12.5px;color:var(--muted);margin-top:10px}

/* İçerik kartı */
.content{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:22px;padding:32px 34px;box-shadow:var(--shadow-lg);
  animation:fadeUp .55s ease both;animation-delay:.05s;
}
.content::before{
  content:'';position:absolute;inset:-1px;border-radius:22px;padding:1px;
  background:linear-gradient(135deg,rgba(6,182,212,.35),rgba(251,191,36,.28) 45%,transparent 70%);
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  pointer-events:none;
}
@media (max-width:640px){.content{padding:24px 20px}}

.content h2{
  font-size:19px;font-weight:800;letter-spacing:-.01em;margin:34px 0 12px;
  padding-bottom:10px;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:10px;
}
.content h2:first-child{margin-top:0}
.content h2 .n{
  display:inline-grid;place-items:center;width:26px;height:26px;border-radius:8px;
  background:linear-gradient(135deg,#e0f7fa,#b2ebf2);color:var(--brand);
  font-size:12px;font-weight:800;flex:0 0 auto;
  box-shadow:inset 0 0 0 1px rgba(6,182,212,.25);
}
.content h3{font-size:15.5px;font-weight:700;margin:20px 0 8px;color:var(--text)}
.content p{margin:0 0 14px;color:var(--text-2)}
.content ul,.content ol{margin:0 0 16px;padding-left:22px;color:var(--text-2)}
.content li{margin:7px 0}
.content li::marker{color:var(--brand)}
.content strong{color:var(--text);font-weight:700}
.content a{color:var(--brand);text-decoration:none;font-weight:600;border-bottom:1px solid rgba(14,165,183,.3);transition:border-color .15s}
.content a:hover{border-bottom-color:var(--brand)}

.callout{
  display:flex;gap:14px;padding:16px 18px;border-radius:14px;
  background:linear-gradient(135deg,#ecfeff,#f0fdfa);border:1px solid #cffafe;
  margin:18px 0;
}
.callout .ic{font-size:20px;flex:0 0 auto}
.callout b{display:block;margin-bottom:3px;color:var(--text);font-weight:700}
.callout p{margin:0;font-size:13.5px;color:var(--text-2)}

.callout.warn{background:linear-gradient(135deg,#fffbeb,#fef3c7);border-color:#fde68a}
.callout.warn b{color:#92400e}

/* İletişim kartları */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;margin:8px 0 22px}
.contact-card{
  display:flex;gap:14px;padding:18px;border-radius:16px;
  background:#f8fafc;border:1px solid var(--line);
  transition:border-color .15s,transform .12s,box-shadow .15s;
}
.contact-card:hover{border-color:var(--brand-3);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.contact-card .ic{
  width:44px;height:44px;flex:0 0 auto;border-radius:13px;display:grid;place-items:center;
  font-size:20px;background:linear-gradient(135deg,#f0fdfa,#ecfeff);border:1px solid #cffafe;
}
.contact-card b{display:block;font-size:14px;margin-bottom:3px}
.contact-card p{margin:0;font-size:13px;color:var(--muted);line-height:1.5}
.contact-card a{font-size:13.5px;font-weight:600;color:var(--brand);text-decoration:none;border-bottom:1px solid rgba(14,165,183,.3)}
.contact-card a:hover{border-bottom-color:var(--brand)}

/* Footer */
footer{
  margin-top:auto;padding:26px 0 10px;text-align:center;
  color:var(--muted);font-size:12px;border-top:1px solid var(--line);
}
footer .fnav{display:flex;gap:18px;justify-content:center;margin-bottom:10px;flex-wrap:wrap}
footer a{color:var(--text-2);text-decoration:none;font-weight:600;transition:color .15s}
footer a:hover{color:var(--brand)}

@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}