/* OST Bilişim — v2 Design System (uppoint.com.tr'den ilham alındı, OST marka renkleriyle) */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&display=swap');

:root{
  --accent:#F57C00;
  --accent-dark:#E65100;
  --accent-tint:#FBDFBC;
  --dark:#263238;
  --dark-2:#37474F;
  --dark-3:#1B242B;
  --bg:#FAF5EE;
  --surface:#FFFFFF;
  --surface-2:#F8E4CB;
  --text:#20272B;
  --text-muted:#66707A;
  --border:rgba(38,50,56,.14);
  --good:#1F9D6C;
  --good-tint:#E4F5EC;
  --blue:#2E6FF2;
  --blue-tint:#DCE7FE;
  --teal:#0D9488;
  --teal-tint:#D6F0EC;
  --purple:#7C5CFC;
  --purple-tint:#E7E1FE;
  --radius-s:10px;
  --radius-m:16px;
  --radius-l:24px;
  --shadow:0 1px 2px rgba(20,24,28,.04), 0 12px 32px -16px rgba(20,24,28,.18);
  --shadow-lg:0 24px 60px -20px rgba(20,24,28,.28);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Outfit', "Segoe UI", Arial, sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{
  font-family:'Outfit', sans-serif;
  font-weight:700;
  line-height:1.16;
  text-wrap:balance;
  margin:0;
  color:var(--dark);
}
p{ margin:0; color:var(--text-muted); line-height:1.7; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
img{ max-width:100%; display:block; }
.wrap{ max-width:1200px; margin:0 auto; padding:0 24px; }

.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:.78rem; font-weight:600; letter-spacing:.08em; text-transform:uppercase;
  color:var(--accent-dark);
  background:var(--accent-tint);
  padding:7px 16px 7px 12px;
  border-radius:999px;
}
.eyebrow::before{ content:""; width:6px; height:6px; border-radius:50%; background:var(--accent); }
.eyebrow.c-blue{ background:var(--blue-tint); color:var(--blue); }
.eyebrow.c-blue::before{ background:var(--blue); }
.eyebrow.c-teal{ background:var(--teal-tint); color:var(--teal); }
.eyebrow.c-teal::before{ background:var(--teal); }
.eyebrow.c-purple{ background:var(--purple-tint); color:var(--purple); }
.eyebrow.c-purple::before{ background:var(--purple); }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:14px 26px;
  border-radius:999px;
  font-weight:600; font-size:.96rem;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
  white-space:nowrap;
}
.btn:focus-visible{ outline:2px solid var(--accent); outline-offset:2px; }
.btn-dark{ background:var(--dark); color:#fff; box-shadow:var(--shadow); }
.btn-dark:hover{ background:var(--dark-3); transform:translateY(-1px); }
.btn-accent{ background:var(--accent); color:#fff; box-shadow:0 10px 24px -10px rgba(245,124,0,.55); }
.btn-accent:hover{ background:var(--accent-dark); transform:translateY(-1px); }
.btn-outline{ background:transparent; color:var(--dark); border-color:var(--border); }
.btn-outline:hover{ background:var(--surface-2); }
.btn-outline-light{ background:transparent; color:#fff; border-color:rgba(255,255,255,.35); }
.btn-outline-light:hover{ background:rgba(255,255,255,.1); }

/* ---------- header ---------- */
header{
  position:sticky; top:0; z-index:50;
  background:rgba(250,245,238,.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.nav{ display:flex; align-items:center; justify-content:space-between; padding:14px 24px; gap:24px; }
.brand img{ height:42px; width:auto; }
.navlinks{ display:flex; align-items:center; gap:6px; }
.navlinks > a, .nav-item > a{
  font-size:.95rem; font-weight:500; color:var(--dark);
  padding:9px 16px; border-radius:999px;
  transition:background .15s;
}
.navlinks > a:hover, .navlinks > a.active,
.nav-item > a:hover{ background:var(--surface-2); }
.nav-item{ position:static; }
.nav-item > a{ display:inline-flex; align-items:center; gap:5px; }
.nav-item svg{ transition:transform .15s; }
.nav-item:hover svg{ transform:rotate(180deg); }

/* mega menu */
.mega-panel{
  position:absolute; top:calc(100% + 12px); left:50%;
  width:min(960px, 94vw);
  transform:translateX(-50%) translateY(6px);
  background:var(--surface); border:1px solid var(--border); border-radius:22px;
  box-shadow:var(--shadow-lg);
  padding:30px;
  opacity:0; visibility:hidden;
  transition:opacity .15s, transform .15s, visibility .15s;
  z-index:60;
}
.nav-item:hover .mega-panel{ opacity:1; visibility:visible; transform:translateX(-50%) translateY(0); }
.mega-head{ display:flex; justify-content:space-between; align-items:flex-end; margin-bottom:22px; gap:16px; }
.mega-head h4{ font-size:1.05rem; }
.mega-head p{ font-size:.88rem; margin-top:4px; }
.mega-head .see-all{ font-weight:600; font-size:.88rem; color:var(--accent-dark); white-space:nowrap; display:inline-flex; align-items:center; gap:6px; }
.mega-body{ display:grid; grid-template-columns:220px 1fr; gap:28px; }
.mega-promo{ background:var(--dark); color:#fff; border-radius:16px; padding:24px; display:flex; flex-direction:column; }
.mega-promo .tag{ font-family:inherit; font-size:.7rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase; color:var(--accent); margin-bottom:12px; }
.mega-promo h5{ color:#fff; font-size:1rem; margin-bottom:12px; }
.mega-promo ul{ display:flex; flex-direction:column; gap:9px; margin-bottom:20px; }
.mega-promo li{ font-size:.8rem; color:rgba(255,255,255,.78); display:flex; gap:7px; align-items:flex-start; }
.mega-promo li svg{ flex:none; color:#3DDC9A; margin-top:2px; }
.mega-promo .btn{ margin-top:auto; width:100%; }
.mega-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.mega-col h6{ font-size:.7rem; text-transform:uppercase; letter-spacing:.06em; color:var(--text-muted); margin-bottom:10px; font-weight:700; }
.mega-col a{ display:flex; gap:10px; padding:8px 6px; border-radius:10px; margin:0 -6px 2px; align-items:flex-start; }
.mega-col a:hover{ background:var(--surface-2); }
.mega-col a .ic{ width:30px; height:30px; border-radius:9px; background:var(--accent-tint); color:var(--accent-dark); display:flex; align-items:center; justify-content:center; flex:none; }
.mega-col a .ic.c-blue{ background:var(--blue-tint); color:var(--blue); }
.mega-col a .ic.c-teal{ background:var(--teal-tint); color:var(--teal); }
.mega-col a .ic.c-purple{ background:var(--purple-tint); color:var(--purple); }
.mega-col a strong{ display:block; font-size:.85rem; color:var(--dark); font-weight:600; }
.mega-col a span{ display:block; font-size:.72rem; color:var(--text-muted); margin-top:1px; }
@media (max-width:1200px){ .mega-grid{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:960px){ .mega-panel{ display:none; } }
.nav-cta{ display:flex; align-items:center; gap:10px; }
.burger{ display:none; background:none; border:none; cursor:pointer; padding:6px; color:var(--dark); }
.mobile-panel{ display:none; }

@media (max-width:960px){
  .navlinks{ display:none; }
  .nav-cta .btn-outline{ display:none; }
  .burger{ display:flex; }
  .mobile-panel.open{ display:flex; flex-direction:column; padding:6px 24px 20px; border-top:1px solid var(--border); }
  .mobile-panel > a{ padding:13px 4px; font-weight:500; border-bottom:1px solid var(--border); }
  .mobile-panel .btn{ margin-top:14px; }

  .mobile-services{ border-bottom:1px solid var(--border); }
  .mobile-services summary{
    padding:13px 4px; font-weight:500; color:var(--dark); cursor:pointer;
    display:flex; align-items:center; justify-content:space-between;
    list-style:none;
  }
  .mobile-services summary::-webkit-details-marker{ display:none; }
  .mobile-services summary::after{
    content:""; width:9px; height:9px; border-right:2px solid var(--text-muted); border-bottom:2px solid var(--text-muted);
    transform:rotate(45deg); transition:transform .15s; margin-right:4px;
  }
  .mobile-services[open] summary::after{ transform:rotate(-135deg); }
  .mobile-services-body{ padding:2px 0 14px; }
  .mobile-services-cat{ font-size:.7rem; text-transform:uppercase; letter-spacing:.06em; color:var(--text-muted); font-weight:700; margin:14px 0 6px 4px; }
  .mobile-services-cat:first-child{ margin-top:4px; }
  .mobile-services-body a{ display:flex; align-items:center; gap:10px; padding:9px 4px; font-size:.92rem; color:var(--text); }
  .mobile-services-body a .ic{ width:26px; height:26px; border-radius:8px; background:var(--accent-tint); color:var(--accent-dark); display:flex; align-items:center; justify-content:center; flex:none; }
  .mobile-services-body a .ic.c-blue{ background:var(--blue-tint); color:var(--blue); }
  .mobile-services-body a .ic.c-teal{ background:var(--teal-tint); color:var(--teal); }
  .mobile-services-body a .ic.c-purple{ background:var(--purple-tint); color:var(--purple); }
  .mobile-services-body a.see-all-mobile{ color:var(--accent-dark); font-weight:600; }
}

/* ---------- hero ---------- */
.hero{ position:relative; padding:64px 0 84px; overflow:hidden; }
.hero::before{
  content:""; position:absolute; top:-200px; right:-220px; width:680px; height:680px; border-radius:50%;
  background:radial-gradient(circle, var(--accent-tint) 0%, transparent 68%);
  pointer-events:none;
}
.hero::after{
  content:""; position:absolute; bottom:-220px; left:-200px; width:560px; height:560px; border-radius:50%;
  background:radial-gradient(circle, var(--blue-tint) 0%, transparent 70%);
  opacity:.7;
  pointer-events:none;
}
.hero-grid{ position:relative; display:grid; grid-template-columns:1.15fr .85fr; gap:56px; align-items:center; }
.hero h1{ font-size:clamp(2.2rem,4vw,3.4rem); margin:18px 0 20px; }
.hero h1 em{ font-style:normal; color:var(--accent); }
.hero p.lead{ font-size:1.1rem; max-width:52ch; margin-bottom:30px; }
.hero-ctas{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom:28px; }
.tech-chips{ display:flex; flex-wrap:wrap; gap:10px; }
.tech-chips span{
  font-size:.82rem; font-weight:500; color:var(--dark);
  background:var(--surface); border:1px solid var(--border);
  padding:7px 14px; border-radius:999px;
}

.hero-card{
  background:var(--dark); color:#fff;
  border-radius:var(--radius-l);
  padding:34px 30px;
  box-shadow:var(--shadow-lg);
}
.hero-card .badge{
  width:46px; height:46px; border-radius:13px; background:rgba(245,124,0,.22); color:var(--accent);
  display:flex; align-items:center; justify-content:center; margin-bottom:18px;
}
.hero-card h3{ color:#fff; font-size:1.35rem; margin-bottom:10px; }
.hero-card p{ color:rgba(255,255,255,.72); font-size:.96rem; margin-bottom:22px; }
.hero-card ul{ display:flex; flex-direction:column; gap:12px; margin-bottom:24px; }
.hero-card li{ display:flex; gap:10px; font-size:.9rem; color:rgba(255,255,255,.88); align-items:flex-start; }
.hero-card li svg{ flex:none; color:#3DDC9A; margin-top:2px; }
.hero-card-stats{ display:flex; gap:22px; padding-top:20px; border-top:1px solid rgba(255,255,255,.14); flex-wrap:wrap; }
.hero-card-stats b{ display:block; font-size:1.4rem; font-weight:700; color:#fff; }
.hero-card-stats span{ font-size:.76rem; color:rgba(255,255,255,.6); }

@media (max-width:960px){
  .hero-grid{ grid-template-columns:1fr; }
}

/* ---------- page header banner (inner pages) ---------- */
.page-hero{ position:relative; padding:56px 0 60px; overflow:hidden; text-align:center; }
.page-hero::before{
  content:""; position:absolute; top:-140px; left:50%; transform:translateX(-50%); width:640px; height:400px; border-radius:50%;
  background:radial-gradient(circle, var(--accent-tint) 0%, transparent 70%);
  pointer-events:none;
}
.page-hero h1{ position:relative; font-size:clamp(2rem,3.4vw,2.7rem); margin-top:14px; }
.page-hero p{ position:relative; max-width:56ch; margin:14px auto 0; font-size:1.05rem; }

/* ---------- sections ---------- */
section{ padding:80px 0; }
.section-alt{ background:var(--surface-2); }
.section-head{ max-width:640px; margin-bottom:44px; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }
.section-head h2{ font-size:clamp(1.6rem,2.8vw,2.3rem); margin-top:14px; }
.section-head p{ margin-top:14px; font-size:1.02rem; }

/* stats band */
.stats-band{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--border); border:1px solid var(--border); border-radius:var(--radius-m); overflow:hidden; }
.stats-band div{ background:var(--surface); padding:30px 22px; }
.stats-band b{ display:block; font-size:2.1rem; font-weight:700; color:var(--accent); font-variant-numeric:tabular-nums; }
.stats-band span{ font-size:.86rem; color:var(--text-muted); }
@media (max-width:700px){ .stats-band{ grid-template-columns:repeat(2,1fr); } }

/* expertise two column */
.expertise{ display:grid; grid-template-columns:1fr 1fr; gap:24px; }
.expertise-card{ background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-l); padding:36px; }
.expertise-card .icon{ width:56px; height:56px; border-radius:16px; background:var(--accent-tint); color:var(--accent); display:flex; align-items:center; justify-content:center; margin-bottom:20px; }
.expertise-card h3{ font-size:1.35rem; margin-bottom:12px; }
.expertise-card ul{ margin-top:18px; display:flex; flex-direction:column; gap:12px; }
.expertise-card li{ display:flex; gap:10px; font-size:.94rem; color:var(--text); align-items:flex-start; }
.expertise-card li svg{ flex:none; margin-top:2px; color:var(--good); }
@media (max-width:900px){ .expertise{ grid-template-columns:1fr; } }

/* service cards */
.services-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(270px,1fr)); gap:20px; }
.service-card{
  display:block;
  position:relative; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-m);
  padding:30px 26px 26px; overflow:hidden;
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.service-card .more{ display:inline-flex; align-items:center; gap:6px; margin-top:14px; font-size:.86rem; font-weight:600; color:var(--accent-dark); }
.service-card .more svg{ transition:transform .15s; }
.service-card:hover .more svg{ transform:translateX(3px); }
.service-card::before{ content:""; position:absolute; top:0; left:0; right:0; height:4px; background:linear-gradient(90deg, var(--accent), var(--accent-dark)); transform:scaleX(0); transform-origin:left; transition:transform .2s ease; }
.service-card:hover{ transform:translateY(-4px); box-shadow:var(--shadow); border-color:transparent; }
.service-card:hover::before{ transform:scaleX(1); }
.service-icon{ width:52px; height:52px; border-radius:15px; background:var(--accent-tint); color:var(--accent-dark); display:flex; align-items:center; justify-content:center; margin-bottom:18px; }
.service-icon.c-blue{ background:var(--blue-tint); color:var(--blue); }
.service-icon.c-teal{ background:var(--teal-tint); color:var(--teal); }
.service-icon.c-purple{ background:var(--purple-tint); color:var(--purple); }
.service-card:hover .service-icon.c-blue ~ .more, .service-card:has(.c-blue) .more{ color:var(--blue); }
.service-card:has(.c-teal) .more{ color:var(--teal); }
.service-card:has(.c-purple) .more{ color:var(--purple); }
.service-card:has(.c-blue)::before{ background:linear-gradient(90deg, var(--blue), #5C8DFF); }
.service-card:has(.c-teal)::before{ background:linear-gradient(90deg, var(--teal), #14B8A6); }
.service-card:has(.c-purple)::before{ background:linear-gradient(90deg, var(--purple), #9B82FF); }
.service-card h3{ font-size:1.08rem; margin-bottom:10px; }
.service-card p{ font-size:.9rem; }
.service-tag{
  position:absolute; top:24px; right:22px;
  font-size:.65rem; font-weight:700; letter-spacing:.05em; text-transform:uppercase;
  color:var(--good); background:var(--good-tint); padding:4px 10px; border-radius:999px;
}
.service-tag.new{ color:var(--accent-dark); background:var(--accent-tint); }

/* why us */
.why-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
.why-item{ display:flex; gap:16px; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-m); padding:24px; }
.why-item .service-icon{ margin-bottom:0; flex:none; }
.why-item h3{ font-size:1rem; margin-bottom:6px; }
.why-item p{ font-size:.88rem; }
@media (max-width:900px){ .why-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .why-grid{ grid-template-columns:1fr; } }

/* values grid (kurumsal) */
.values-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }
.value-card{ text-align:left; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-m); padding:26px; }
.value-card .service-icon{ margin-bottom:16px; }
.value-card h3{ font-size:1rem; margin-bottom:8px; }
.value-card p{ font-size:.88rem; }
@media (max-width:900px){ .values-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .values-grid{ grid-template-columns:1fr; } }

/* about two column */
.about-grid{ display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center; }
.about-grid ul{ display:flex; flex-direction:column; gap:14px; margin-top:22px; }
.about-grid li{ display:flex; gap:10px; align-items:flex-start; font-size:.96rem; color:var(--text); }
.about-grid li svg{ flex:none; color:var(--good); margin-top:3px; }
.about-panel{ background:var(--dark); border-radius:var(--radius-l); padding:36px; color:#fff; }
.about-panel h4{ color:#fff; }
@media (max-width:900px){ .about-grid{ grid-template-columns:1fr; gap:32px; } }

.vm-grid{ display:grid; grid-template-columns:1fr 1fr; gap:24px; }
.vm-card{ background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-l); padding:34px; }
.vm-card .icon{ width:52px; height:52px; border-radius:14px; background:var(--accent-tint); color:var(--accent); display:flex; align-items:center; justify-content:center; margin-bottom:18px; }
.vm-card h3{ font-size:1.2rem; margin-bottom:10px; }
@media (max-width:800px){ .vm-grid{ grid-template-columns:1fr; } }

/* cta band */
.cta-band{
  background:linear-gradient(135deg, var(--dark) 0%, var(--dark-3) 100%);
  color:#fff; border-radius:var(--radius-l); padding:52px 48px;
  display:flex; align-items:center; justify-content:space-between; gap:32px; flex-wrap:wrap;
}
.cta-band h2{ color:#fff; font-size:clamp(1.4rem,2.4vw,1.9rem); max-width:26ch; }
.cta-band p{ color:rgba(255,255,255,.68); margin-top:10px; max-width:44ch; }

/* contact page */
.contact-grid{ display:grid; grid-template-columns:.9fr 1.1fr; gap:48px; align-items:flex-start; }
.contact-info-item{ display:flex; gap:16px; align-items:flex-start; margin-bottom:22px; }
.contact-form{ background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-l); padding:36px; box-shadow:var(--shadow); }
.form-row{ margin-bottom:18px; }
.form-row label{ display:block; margin-bottom:7px; font-weight:600; font-size:.9rem; color:var(--dark); }
.form-row input, .form-row textarea{
  width:100%; padding:12px 14px; border:1.5px solid var(--border); border-radius:10px;
  font-family:inherit; font-size:.95rem; color:var(--text); background:var(--bg);
  transition:border-color .15s;
}
.form-row input:focus, .form-row textarea:focus{ outline:none; border-color:var(--accent); }
.form-alert{ padding:14px 16px; border-radius:10px; margin-bottom:18px; font-size:.9rem; }
.form-alert.success{ background:var(--good-tint); color:#0F5132; }
.form-alert.error{ background:#FCE8E6; color:#8A2C21; }
@media (max-width:900px){ .contact-grid{ grid-template-columns:1fr; } }

/* service detail template */
.service-hero-icon{ width:64px; height:64px; border-radius:18px; background:var(--accent-tint); color:var(--accent); display:flex; align-items:center; justify-content:center; margin:0 auto 18px; }
.steps-row{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.step{ position:relative; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-m); padding:28px 24px; }
.step .num{ width:38px; height:38px; border-radius:50%; background:var(--dark); color:#fff; display:flex; align-items:center; justify-content:center; font-weight:700; font-size:.95rem; margin-bottom:18px; }
.step h3{ font-size:1.02rem; margin-bottom:8px; }
.step p{ font-size:.88rem; }
@media (max-width:900px){ .steps-row{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .steps-row{ grid-template-columns:1fr; } }

.benefits-list{ display:grid; grid-template-columns:1fr 1fr; gap:14px 32px; }
.benefits-list li{ display:flex; gap:10px; align-items:flex-start; font-size:.96rem; color:var(--text); }
.benefits-list li svg{ flex:none; color:var(--good); margin-top:3px; }
@media (max-width:700px){ .benefits-list{ grid-template-columns:1fr; } }

.related-note{ background:var(--accent-tint); border-radius:var(--radius-m); padding:20px 26px; display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; }
.related-note strong{ color:var(--dark); }
.related-note a{ font-weight:700; color:var(--accent-dark); white-space:nowrap; display:inline-flex; align-items:center; gap:6px; }

.breadcrumb{ font-size:.85rem; color:var(--text-muted); margin-bottom:12px; position:relative; }
.breadcrumb a{ color:var(--text-muted); }
.breadcrumb a:hover{ color:var(--accent-dark); }

/* footer */
footer{ background:var(--dark); color:rgba(255,255,255,.7); padding:60px 0 26px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:40px; padding-bottom:36px; }
.footer-grid h4{ color:#fff; font-size:.9rem; margin-bottom:16px; }
.footer-grid li{ margin-bottom:10px; font-size:.92rem; }
.footer-grid a:hover{ color:var(--accent); }
.footer-brand .logo-chip{ display:inline-flex; background:#fff; padding:8px 14px; border-radius:10px; margin-bottom:16px; }
.footer-brand img{ height:30px; }
.footer-bottom{ border-top:1px solid rgba(255,255,255,.12); padding-top:22px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; font-size:.85rem; }
@media (max-width:700px){ .footer-grid{ grid-template-columns:1fr 1fr; } }