:root{--c1:#155e75;--c2:#ecfeff;--ink:#0b1b21;--mute:#5c6b70;--rule:#d5dfe2}
*{box-sizing:border-box}
html{font-size:17px}
body{margin:0;background:#fff;color:var(--ink);font-family:'Archivo',system-ui,sans-serif;line-height:1.6}
h1,h2,h3{font-family:'Archivo Black','Archivo',sans-serif;font-weight:400;line-height:1.1;margin:0}
a{color:var(--c1)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,label:focus-visible{outline:2px solid var(--ink);outline-offset:3px}

/* kısa sınıflar */
.w{max-width:960px;margin:0 auto;padding:0 1.25rem}
.wn{max-width:680px}
.fx{display:flex}.fw{flex-wrap:wrap}.jb{justify-content:space-between}.ac{align-items:center}.ae{align-items:end}
.g1{gap:.5rem}.g2{gap:1rem}.g3{gap:2rem}
.gr2{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.pv2{padding-top:1rem;padding-bottom:1rem}.pv3{padding-top:2rem;padding-bottom:2rem}.pv5{padding-top:4.5rem;padding-bottom:4.5rem}
.mt1{margin-top:.5rem}.mt2{margin-top:1rem}.mt3{margin-top:2rem}.mt5{margin-top:4.5rem}
.mb1{margin-bottom:.5rem}.mb2{margin-bottom:1rem}.mb3{margin-bottom:2rem}
.bt{border-top:1px solid var(--rule)}.bb{border-bottom:1px solid var(--rule)}.bt2{border-top:2px solid var(--ink)}
.tc{text-align:center}
.up{text-transform:uppercase;letter-spacing:.14em;font-size:.72rem}
.sm{font-size:.88rem}.lg{font-size:1.25rem}
.xl{font-size:clamp(2.4rem,7vw,4.6rem);letter-spacing:-.03em}
.h2{font-size:1.7rem}.h3{font-size:1.15rem}
.c1{color:var(--c1)}.mute{color:var(--mute)}
.bg2{background:var(--c2)}
.nd{text-decoration:none}
.ib{display:inline-block}
.blk{display:block}
.rel{position:relative}
.ls{list-style:none;padding:0;margin:0}

/* menü */
.nav a{color:var(--ink);text-decoration:none;padding:.3rem 0;border-bottom:1px solid transparent}
.nav a:hover,.nav a[aria-current]{border-bottom-color:var(--c1);color:var(--c1)}
.logo{font-family:'Archivo Black',sans-serif;font-size:1.15rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.skip{position:absolute;left:0;top:-4rem;background:var(--ink);color:#fff;padding:.5rem 1rem}
.skip:focus{top:0}

/* düğme: yalnızca çizgi */
.btn{display:inline-block;padding:.75rem 1.4rem;border:1px solid var(--ink);color:var(--ink);text-decoration:none;font-weight:600;background:#fff;font:inherit;cursor:pointer}
.btn:hover{background:var(--ink);color:#fff}
.btn.f{background:var(--c1);border-color:var(--c1);color:#fff}
.btn.f:hover{background:var(--ink);border-color:var(--ink)}

/* hero */
.hero{border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.hero .line{width:64px;height:2px;background:var(--c1)}
.hero2{display:grid;grid-template-columns:1.15fr .85fr;gap:2.5rem;align-items:center}

/* görsel: ince çizgili çerçeve, köşe yok */
.im{margin:0;border:1px solid var(--rule);padding:.4rem;background:#fff;line-height:0}
.img{display:block;width:100%;max-width:100%;height:auto;object-fit:cover;aspect-ratio:16/9}
.fr{float:right;width:46%;margin:.35rem 0 1.2rem 2rem}
.cf::after{content:"";display:table;clear:both}
.mt0{margin-top:0}

/* bağlantı listesi */
.lnk{display:grid;grid-template-columns:auto 1fr auto;gap:1.5rem;align-items:baseline;padding:1.4rem 0;border-bottom:1px solid var(--rule);text-decoration:none;color:var(--ink)}
.lnk:first-child{border-top:1px solid var(--rule)}
.lnk .n{font-family:'Archivo Black',sans-serif;color:var(--c1)}
.lnk:hover .t{text-decoration:underline}

/* sss: onay kutusu ile aç/kapa */
.q{border-bottom:1px solid var(--rule)}
.q input{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}
.q label{display:flex;justify-content:space-between;gap:1rem;padding:1rem 0;cursor:pointer;font-weight:600}
.q label::after{content:"+";color:var(--c1);font-weight:400;font-size:1.3rem;line-height:1}
.q input:checked + label::after{content:"\2013"}
.q input:focus-visible + label{outline:2px solid var(--ink);outline-offset:2px}
.q .a{display:none;padding:0 0 1.1rem;color:var(--mute)}
.q input:checked ~ .a{display:block}

/* metin */
.tx h2{font-size:1.5rem;margin:2.4rem 0 .7rem}
.tx h3{font-size:1.15rem;margin:1.6rem 0 .5rem}
.tx p{margin:0 0 1rem}
.tx ul,.tx ol{padding-left:1.3rem}
.tx li{margin-bottom:.35rem}
.tx table{width:100%;border-collapse:collapse;margin:1.2rem 0}
.tx th,.tx td{text-align:left;padding:.55rem .5rem;border-bottom:1px solid var(--rule)}
.tx th{border-bottom:2px solid var(--ink)}
.tx strong{color:var(--c1)}

/* form */
.f label{display:block;margin-bottom:1.2rem}
.f label span{display:block;font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;margin-bottom:.35rem;color:var(--mute)}
.f input,.f textarea{width:100%;border:0;border-bottom:1px solid var(--ink);padding:.6rem 0;font:inherit;background:transparent}
.f input:focus,.f textarea:focus{outline:0;border-bottom:2px solid var(--c1)}
.hp{position:absolute;left:-5000px;top:0}
.msg{padding:.9rem 1rem;border-left:3px solid var(--c1);background:var(--c2);margin-bottom:1.5rem}
.msg.err{border-color:#b91c1c;background:#fff5f5}
.msg ul{margin:0;padding-left:1.1rem}
.kanal li{padding:.7rem 0;border-bottom:1px solid var(--rule)}
.kanal a{text-decoration:none}
.kanal a:hover{text-decoration:underline}

.crumb{font-size:.85rem;color:var(--mute)}
.crumb a{color:var(--mute)}
.crumb span{margin:0 .4rem}

footer{color:var(--mute);font-size:.88rem}
footer a{color:var(--mute)}

@media(max-width:700px){
  .gr2,.hero2{grid-template-columns:1fr}
  .fr{float:none;width:100%;margin:0 0 1.5rem}
  .pv5{padding-top:3rem;padding-bottom:3rem}
  .nav{width:100%}
  .lnk{grid-template-columns:auto 1fr}
  .lnk .go{display:none}
}

/* blog */
.tr{text-align:right}
.yzl{display:block}
.yz{display:grid;grid-template-columns:110px 1fr;gap:1.5rem;align-items:start;padding:1.8rem 0;border-bottom:1px solid var(--rule)}
.yz-g{grid-template-columns:110px 1fr 220px}
.yz h2 a{color:var(--ink)}
.yz h2 a:hover{color:var(--c1);text-decoration:underline}
.yzm{display:block;line-height:0;border:1px solid var(--rule);padding:.3rem}
.yzi{aspect-ratio:16/9}
.yz3{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;padding-bottom:1rem}
.yzk{border-top:1px solid var(--rule);padding-top:1rem}
.yzk h3 a{color:var(--ink)}
.yzk h3 a:hover{color:var(--c1);text-decoration:underline}
.kms{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.kms a{color:var(--ink);font-weight:600}
.kms a:hover{color:var(--c1)}
.kms .up{margin-bottom:.3rem}
.sck ol{counter-reset:sck}
.sck li{display:flex;justify-content:space-between;gap:1rem;padding:.7rem 0;border-bottom:1px solid var(--rule);counter-increment:sck}
.sck li::before{content:counter(sck,decimal-leading-zero);font-family:'Archivo Black',sans-serif;color:var(--c1);margin-right:.6rem}
.sck li a{flex:1;text-decoration:none;color:var(--ink)}
.sck li a:hover{text-decoration:underline;color:var(--c1)}
@media(max-width:700px){
  .yz,.yz-g{grid-template-columns:1fr;gap:.6rem}
  .yzm{max-width:320px}
  .yz3{grid-template-columns:1fr}
  .kms{grid-template-columns:1fr}
  .kms .tr{text-align:left}
}