/* ==========================================================================
   Düş'ün Kurumsal — dusunkurumsal.com
   Marka renkleri logodan: lacivert #122D48 / turkuaz #12AEBE
   ========================================================================== */

:root{
  --navy-950:#081B2C;
  --navy-900:#0B2338;
  --navy:#122D48;
  --navy-700:#1B3E5C;
  --teal:#12AEBE;
  --teal-600:#0E8E9C;
  --slate:#4F7386;
  --ink:#20415C;
  --pale:#E9F0F3;
  --wash:#D5E7E8;
  --line:rgba(18,45,72,.13);
  --line-light:rgba(233,240,243,.16);

  --display:"Outfit","Poppins","Segoe UI",system-ui,sans-serif;
  --body:"Inter","Segoe UI",system-ui,-apple-system,sans-serif;

  --wrap:1180px;
  --pad:clamp(20px,5vw,48px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}

body{
  margin:0;
  font-family:var(--body);
  font-size:16px;
  line-height:1.72;
  color:var(--ink);
  background:var(--pale);
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;height:auto}
a{color:inherit}
::selection{background:var(--teal);color:#fff}
:focus-visible{outline:2px solid var(--teal);outline-offset:4px;border-radius:2px}

.skip{position:absolute;left:-9999px;top:0;z-index:99;background:var(--teal);color:#fff;
  padding:10px 18px;font-family:var(--display);font-size:.85rem;letter-spacing:.06em}
.skip:focus{left:12px;top:12px}

.wrap{max-width:var(--wrap);margin:0 auto}

/* ---------------------------------------------------------------- tipografi */

h1,h2,h3,h4{font-family:var(--display);color:var(--navy);margin:0}
h1{font-weight:300;font-size:clamp(2.15rem,6vw,3.9rem);line-height:1.06;letter-spacing:-.015em}
h2{font-weight:300;font-size:clamp(1.7rem,4.2vw,2.7rem);line-height:1.14;letter-spacing:-.01em}
h3{font-weight:600;font-size:1.04rem;line-height:1.4}
p{margin:0 0 20px}
p:last-child{margin-bottom:0}

.kicker{
  display:flex;align-items:center;gap:14px;
  font-family:var(--display);font-size:.68rem;font-weight:500;
  letter-spacing:.32em;text-transform:uppercase;color:var(--teal-600);margin:0 0 20px;
}
.kicker::before{content:"";width:34px;height:1px;background:var(--teal);flex:none}
.kicker--light{color:var(--teal)}

.lede{max-width:60ch;font-size:clamp(1.02rem,2vw,1.18rem);line-height:1.72;color:var(--slate)}

/* ------------------------------------------------------------------ üst bar */

.topbar{position:sticky;top:0;z-index:40;background:rgba(233,240,243,.88);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.topbar__inner{max-width:var(--wrap);margin:0 auto;padding:12px var(--pad);
  display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none;flex:none}
.brand img{width:92px}
.brand__tag{display:none;font-family:var(--display);font-size:.62rem;font-weight:500;
  letter-spacing:.28em;text-transform:uppercase;color:var(--slate);
  padding-left:14px;border-left:1px solid var(--line)}

.nav{display:flex;align-items:center;gap:clamp(14px,3vw,34px);flex-wrap:wrap;justify-content:flex-end}
.nav a{font-family:var(--display);font-size:.75rem;font-weight:500;letter-spacing:.13em;
  text-transform:uppercase;text-decoration:none;color:var(--slate);padding-bottom:3px;
  border-bottom:1px solid transparent;transition:color .3s var(--ease),border-color .3s var(--ease)}
.nav a:hover{color:var(--navy)}
.nav a[aria-current="page"]{color:var(--navy);border-color:var(--teal)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--display);font-size:.76rem;font-weight:500;
  letter-spacing:.14em;text-indent:.14em;      /* harf aralığının sağda bıraktığı boşluğu dengeler */
  line-height:1;text-transform:uppercase;text-decoration:none;
  color:#fff;background:var(--navy);border:1px solid var(--navy);border-radius:2px;
  padding:15px 26px;cursor:pointer;
  transition:background .3s var(--ease),border-color .3s var(--ease),color .3s var(--ease);
}
.btn:hover{background:var(--teal-600);border-color:var(--teal-600)}

.btn--ghost{background:transparent;color:var(--navy)}
.btn--ghost:hover{background:var(--navy);color:#fff;border-color:var(--navy)}

/* turkuaz zeminde beyaz yazı okunmuyor; lacivert yazı hem kontrastlı hem net */
.btn--light{background:var(--teal);border-color:var(--teal);color:var(--navy-950)}
.btn--light:hover{background:#fff;border-color:#fff;color:var(--navy)}

.btn--outline-light{background:transparent;border-color:rgba(233,240,243,.4);color:var(--pale)}
.btn--outline-light:hover{background:var(--pale);border-color:var(--pale);color:var(--navy)}


@media (min-width:900px){
  .brand__tag{display:block}
}

/* -------------------------------------------- bölümler + kelebek filigranı */

.band{position:relative;padding:clamp(56px,9vw,110px) var(--pad);overflow:hidden}
.band--white{background:#fff}
.band--pale{background:var(--pale)}
.band--wash{background:linear-gradient(160deg,var(--wash),var(--pale) 62%)}
.band--navy{background:var(--navy-950);color:rgba(233,240,243,.78)}
.band--navy h2,.band--navy h3{color:#fff}
.band > .wrap{position:relative;z-index:2}

.band--mark::after{
  content:"";position:absolute;pointer-events:none;
  right:-13%;top:50%;width:min(60vw,660px);aspect-ratio:898/805;
  transform:translateY(-50%) rotate(-8deg);
  background:url("../img/dusun-mark.png") no-repeat center/contain;
  opacity:.055;
}
.band--navy.band--mark::after{background-image:url("../img/dusun-mark-light.png");opacity:.07}

/* --------------------------------------------------------------------- hero */

.hero{position:relative;background:var(--navy-950);color:var(--pale);
  padding:clamp(72px,13vh,132px) var(--pad) 0;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-20% -10% auto -10%;height:130%;
  background:
    radial-gradient(52% 46% at 74% 22%, rgba(18,174,190,.22), transparent 66%),
    radial-gradient(72% 60% at 30% 100%, rgba(18,45,72,.9), transparent 70%);
  pointer-events:none}
.hero::after{content:"";position:absolute;pointer-events:none;
  right:-8%;top:6%;width:min(52vw,560px);aspect-ratio:898/805;
  background:url("../img/dusun-mark-light.png") no-repeat center/contain;
  opacity:.09;transform:rotate(-6deg)}
.hero__inner{max-width:var(--wrap);margin:0 auto;position:relative;z-index:2}
.hero h1{color:#fff;max-width:16ch}
.hero .lede{color:rgba(233,240,243,.68);margin-top:26px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}

.arms-strip{position:relative;z-index:2;max-width:var(--wrap);margin:clamp(48px,7vw,86px) auto 0;
  border-top:1px solid var(--line-light);display:grid;grid-template-columns:1fr}
.arms-strip a{display:flex;align-items:baseline;gap:12px;padding:18px 0;text-decoration:none;
  border-bottom:1px solid var(--line-light);color:rgba(233,240,243,.72);
  font-family:var(--display);font-size:.82rem;font-weight:400;letter-spacing:.06em;
  transition:color .3s var(--ease),padding-left .3s var(--ease)}
.arms-strip a:hover{color:var(--teal);padding-left:8px}
.arms-strip span{font-size:.62rem;letter-spacing:.24em;text-transform:uppercase;
  color:rgba(18,174,190,.75);flex:none}

@media (min-width:860px){
  .arms-strip{grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line-light)}
  .arms-strip a{flex-direction:column;gap:10px;align-items:flex-start;
    padding:26px 22px 30px;border-bottom:0;border-left:1px solid var(--line-light)}
  .arms-strip a:first-child{border-left:0;padding-left:0}
  .arms-strip a:hover{padding-left:22px}
  .arms-strip a:first-child:hover{padding-left:8px}
}

/* -------------------------------------------------- dört kol (satır düzeni) */

.arms{border-top:1px solid var(--line)}
.arm{display:grid;gap:10px 40px;grid-template-columns:1fr;
  padding:clamp(30px,4.5vw,46px) 0;border-bottom:1px solid var(--line);
  text-decoration:none;color:inherit;transition:background .4s var(--ease)}
.arm:hover{background:rgba(255,255,255,.55)}
.band--white .arm:hover{background:var(--pale)}
.arm__title{font-family:var(--display);font-weight:400;font-size:clamp(1.28rem,2.8vw,1.72rem);
  color:var(--navy);line-height:1.2;letter-spacing:-.005em}
.arm__quote{font-family:var(--display);font-weight:300;
  font-size:clamp(1rem,2vw,1.12rem);color:var(--teal-600);line-height:1.5}
.arm__text{color:var(--slate);font-size:.97rem;margin:0}
.arm__go{display:inline-flex;align-items:center;gap:9px;margin-top:6px;
  font-family:var(--display);font-size:.72rem;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--navy)}
.arm__go::after{content:"\2192";transition:transform .3s var(--ease)}
.arm:hover .arm__go::after{transform:translateX(6px)}

@media (min-width:880px){
  .arm{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:start;
    padding-inline:clamp(6px,1.6vw,22px)}
  .arm__quote{grid-column:1;margin-top:12px}
  .arm__text{grid-column:2;grid-row:1}
  .arm__go{grid-column:2}
}

/* ------------------------------------------------------------------ sayılar */

.stats{display:grid;gap:clamp(26px,4vw,48px);grid-template-columns:1fr}
@media (min-width:760px){.stats{grid-template-columns:repeat(3,1fr)}}
.stat__num{font-family:var(--display);font-weight:200;font-size:clamp(3rem,7vw,4.6rem);
  line-height:1;color:var(--teal);letter-spacing:-.02em}
.stat__label{display:block;margin-top:14px;font-family:var(--display);font-size:.7rem;
  font-weight:500;letter-spacing:.26em;text-transform:uppercase;color:rgba(233,240,243,.62)}
.stat p{margin:14px 0 0;font-size:.95rem;line-height:1.65;color:rgba(233,240,243,.72)}

/* ----------------------------------------------------------- hizmet listesi */

.service{scroll-margin-top:96px;padding-top:clamp(40px,6vw,72px)}
.service + .service{border-top:1px solid var(--line);margin-top:clamp(40px,6vw,72px)}
.service__head{max-width:66ch}
.service__lead{margin-top:20px;color:var(--ink)}

.tags{list-style:none;margin:34px 0 0;padding:0;display:grid;gap:0;grid-template-columns:1fr}
@media (min-width:640px){.tags{grid-template-columns:repeat(2,1fr);column-gap:34px}}
@media (min-width:1000px){.tags{grid-template-columns:repeat(3,1fr)}}
.tags li{position:relative;padding:13px 0 13px 22px;border-bottom:1px solid var(--line);
  font-size:.95rem;line-height:1.5;color:var(--ink)}
.tags li::before{content:"";position:absolute;left:0;top:21px;width:7px;height:7px;
  border-radius:50%;border:1px solid var(--teal)}

.quote-line{margin-top:34px;padding-left:22px;border-left:2px solid var(--teal);
  font-family:var(--display);font-weight:300;font-size:clamp(1.1rem,2.4vw,1.36rem);
  line-height:1.5;color:var(--navy)}

/* ---------------------------------------------------------- kartlar/değerler */

.grid{display:grid;gap:clamp(18px,2.6vw,26px);grid-template-columns:repeat(auto-fit,minmax(258px,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:3px;
  padding:clamp(24px,3.2vw,34px);transition:border-color .35s var(--ease),transform .35s var(--ease)}
.band--white .card{background:var(--pale)}
.card:hover{border-color:rgba(18,174,190,.5);transform:translateY(-3px)}
.card p{margin:10px 0 0;color:var(--slate);font-size:.95rem}

.values{list-style:none;margin:0;padding:0;display:grid;gap:28px;
  grid-template-columns:repeat(auto-fit,minmax(272px,1fr))}
.values li{border-top:1px solid var(--line);padding-top:18px}
.values strong{display:block;font-family:var(--display);font-weight:600;font-size:1rem;
  color:var(--navy);margin-bottom:6px}
.values span{color:var(--slate);font-size:.94rem;line-height:1.65}

.prose{max-width:74ch}
.prose p{color:var(--ink)}

.chips{list-style:none;margin:30px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:10px}
.chips li{font-family:var(--display);font-size:.76rem;font-weight:500;letter-spacing:.08em;
  color:var(--slate);border:1px solid var(--line);border-radius:999px;padding:8px 16px;
  background:rgba(255,255,255,.5)}

.refs{margin-top:clamp(30px,4vw,44px);border:1px solid var(--line);border-radius:3px;
  background:#fff;padding:clamp(14px,2.4vw,26px)}
.refs img{width:100%}
.refs__note{margin:18px 0 0;font-size:.84rem;color:var(--slate)}

/* ---------------------------------------------------------------- iletişim */

.contact-grid{display:grid;gap:clamp(28px,5vw,56px);grid-template-columns:1fr}
@media (min-width:920px){.contact-grid{grid-template-columns:.85fr 1.15fr;align-items:start}}
.contact-list{list-style:none;margin:0;padding:0;display:grid;gap:24px}
.contact-list li{border-top:1px solid var(--line);padding-top:16px}
.contact-list .label{display:block;font-family:var(--display);font-size:.66rem;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--teal-600);margin-bottom:8px}
.contact-list a,.contact-list .value{font-family:var(--display);font-size:1.05rem;color:var(--navy);
  text-decoration:none;line-height:1.5;border-bottom:1px solid transparent;
  transition:color .3s var(--ease),border-color .3s var(--ease)}
.contact-list a:hover{color:var(--teal-600);border-color:var(--teal)}

.form{display:grid;gap:18px;background:#fff;border:1px solid var(--line);border-radius:3px;
  padding:clamp(24px,3.4vw,38px)}
.field{display:grid;gap:8px}
.field label{font-family:var(--display);font-size:.68rem;font-weight:500;letter-spacing:.2em;
  text-transform:uppercase;color:var(--slate)}
.field input,.field textarea,.field select{font-family:var(--body);font-size:.98rem;color:var(--navy);
  background:transparent;border:1px solid rgba(18,45,72,.22);border-radius:2px;padding:13px 14px;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease)}
.field textarea{min-height:136px;resize:vertical}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--teal);
  box-shadow:0 0 0 3px rgba(18,174,190,.16)}
.form button{justify-self:start}
.form__note{margin:0;font-size:.84rem;color:var(--slate);line-height:1.6}

.map{margin-top:clamp(32px,5vw,56px);border:1px solid var(--line);border-radius:3px;
  overflow:hidden;line-height:0}
.map iframe{width:100%;height:380px;border:0;filter:grayscale(.35) contrast(1.02)}

/* ------------------------------------------------------- kapanış + altbilgi */

.cta h2{color:#fff;max-width:18ch}
.cta p{color:rgba(233,240,243,.72);max-width:56ch;margin-top:20px}
.cta__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

.site-foot{background:var(--navy-950);color:rgba(233,240,243,.7);padding:clamp(48px,7vw,76px) var(--pad) 32px}
.site-foot__inner{max-width:var(--wrap);margin:0 auto;display:grid;gap:32px;
  grid-template-columns:repeat(auto-fit,minmax(224px,1fr))}
.site-foot img{width:118px;margin-bottom:16px}
.site-foot p{margin:0 0 8px;font-size:.92rem;line-height:1.7}
.site-foot h4{font-family:var(--display);font-size:.68rem;font-weight:500;letter-spacing:.24em;
  text-transform:uppercase;color:var(--teal);margin:0 0 14px}
.site-foot a{color:rgba(233,240,243,.8);text-decoration:none;border-bottom:1px solid transparent;
  transition:color .3s var(--ease),border-color .3s var(--ease)}
.site-foot a:hover{color:var(--teal);border-color:var(--teal)}
.site-foot__bar{max-width:var(--wrap);margin:38px auto 0;padding-top:22px;
  border-top:1px solid var(--line-light);display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;font-size:.8rem;color:rgba(233,240,243,.48)}

/* ------------------------------------------------------- sayfa başlıkları */

.page-head{position:relative;padding:clamp(60px,10vw,116px) var(--pad) clamp(36px,6vw,64px);
  background:radial-gradient(78% 120% at 88% 0%, rgba(213,231,232,.85), transparent 60%), var(--pale);
  overflow:hidden}
.page-head__inner{max-width:var(--wrap);margin:0 auto;position:relative;z-index:2}
.page-head h1{max-width:18ch;margin-bottom:22px}

/* --------------------------------------------------- kaydırınca beliren içerik */

.reveal{opacity:0;transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.gorundu{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
}

/* ==========================================================================
   Okuma ritmi — metin duvarını kırmak için
   ========================================================================== */

/* başlık solda, metin sağda: göz iki sütun arasında dinleniyor */
.duo{display:grid;gap:clamp(20px,3vw,54px);grid-template-columns:1fr}
.duo__metin{max-width:62ch}
.duo__metin > p:first-child{font-size:clamp(1.04rem,1.9vw,1.16rem);color:var(--navy);line-height:1.7}

@media (min-width:900px){
  .duo{grid-template-columns:minmax(0,.78fr) minmax(0,1.22fr);align-items:start}
  .duo__yan{position:sticky;top:104px}
}

/* ==========================================================================
   Açılır hizmet panelleri
   ========================================================================== */

.akordiyon{margin-top:clamp(32px,5vw,52px);border-top:1px solid var(--line)}

.kol{border-bottom:1px solid var(--line);scroll-margin-top:92px}

.kol > summary{
  list-style:none;cursor:pointer;position:relative;
  display:grid;gap:8px;padding:clamp(24px,3.2vw,32px) 52px clamp(24px,3.2vw,32px) 0;
  transition:padding-left .35s var(--ease);
}
.kol > summary::-webkit-details-marker{display:none}
.kol > summary:hover{padding-left:10px}
.kol > summary:focus-visible{outline:2px solid var(--teal);outline-offset:3px}

.kol__ad{font-family:var(--display);font-weight:400;line-height:1.2;
  font-size:clamp(1.22rem,2.6vw,1.62rem);color:var(--navy);letter-spacing:-.005em}
.kol__alinti{font-family:var(--display);font-weight:300;line-height:1.5;
  font-size:clamp(.98rem,1.9vw,1.1rem);color:var(--teal-600)}
.kol__sayi{font-family:var(--display);font-size:.66rem;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--slate)}

/* artı işareti, açılınca çarpıya döner */
.kol > summary::after{
  content:"";position:absolute;right:8px;top:calc(clamp(24px,3.2vw,32px) + 8px);
  width:15px;height:15px;
  background:
    linear-gradient(var(--teal),var(--teal)) center/15px 1.5px no-repeat,
    linear-gradient(var(--teal),var(--teal)) center/1.5px 15px no-repeat;
  transition:transform .35s var(--ease);
}
.kol[open] > summary::after{transform:rotate(45deg)}

.kol__ic{padding:2px 0 clamp(26px,3.6vw,40px)}
.kol[open] .kol__ic{animation:panelAc .45s var(--ease) both}
@keyframes panelAc{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}

.kol__ic .tags{margin-top:26px}
.kol__giris{max-width:64ch;color:var(--ink)}

@media (prefers-reduced-motion:reduce){
  .kol[open] .kol__ic{animation:none}
}