/* Ersa Grup - Kurumsal Kimlik Stil Dosyası
   Renkler: Zümrüt Yeşil #0f766e · Derin Orman #0b4f4a · Amber #f59e0b · Krem #f7faf9 */
:root{
  --primary:#0f766e;
  --primary-dark:#0b4f4a;
  --primary-soft:#d9efec;
  --accent:#f59e0b;
  --accent-dark:#d97706;
  --ink:#0f2e2b;
  --muted:#52706d;
  --bg:#f7faf9;
  --card:#ffffff;
  --line:#dbe6e4;
  --radius:18px;
  --shadow:0 10px 30px rgba(11,79,74,.10);
  --font-head:'Fraunces',Georgia,'Times New Roman',serif;
  --font-body:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-body);color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%}
a{color:var(--primary);text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.2;margin:0 0 .5em;color:var(--primary-dark)}
h1{font-size:clamp(2rem,4.6vw,3.4rem);font-weight:700}
h2{font-size:clamp(1.6rem,3vw,2.3rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
.container{width:min(1160px,92vw);margin-inline:auto}
.section{padding:84px 0}
.section.alt{background:#fff}
.section.dark{background:var(--primary-dark);color:#d7ebe8}
.section.dark h2,.section.dark h3{color:#fff}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-dark);margin-bottom:12px}
.section.dark .eyebrow{color:var(--accent)}
.lead{font-size:1.1rem;color:var(--muted);max-width:640px}
.center{text-align:center}.center .lead{margin-inline:auto}
.head{margin-bottom:46px}

/* Butonlar */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:700;font-size:.95rem;border:2px solid transparent;cursor:pointer;transition:.2s;font-family:inherit}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px)}
.btn-accent{background:var(--accent);color:#2b1a00}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:#fff;color:var(--primary-dark)}
.btn-outline{border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}

/* Üst bar + menü */
.topbar{background:var(--primary-dark);color:#cfe6e3;font-size:.84rem}
.topbar .container{display:flex;justify-content:space-between;gap:16px;padding:9px 0;flex-wrap:wrap}
.topbar a{color:#cfe6e3}.topbar a:hover{color:#fff}
.topbar span{display:inline-flex;align-items:center;gap:6px;margin-right:18px}
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:78px}
.nav .logo img{height:52px;display:block}
.menu{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0}
.menu a{display:block;padding:10px 15px;border-radius:999px;color:var(--ink);font-weight:600;font-size:.95rem}
.menu a:hover,.menu a.active{background:var(--primary-soft);color:var(--primary-dark)}
.menu .cta a{background:var(--accent);color:#2b1a00;margin-left:8px}
.menu .cta a:hover{background:var(--accent-dark);color:#fff}
.burger{display:none;background:none;border:0;padding:8px;cursor:pointer}
.burger span{display:block;width:26px;height:3px;background:var(--primary-dark);margin:5px 0;border-radius:3px;transition:.2s}

/* Hero */
.hero{position:relative;color:#fff;background:linear-gradient(120deg,var(--primary-dark) 0%,var(--primary) 70%);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(circle at 85% 20%,rgba(245,158,11,.25),transparent 40%),
  radial-gradient(circle at 10% 90%,rgba(255,255,255,.08),transparent 45%)}
.hero .container{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center;padding:96px 0 110px}
.hero h1{color:#fff}
.hero p{font-size:1.15rem;color:#d7ebe8;max-width:560px}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.hero-card{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:28px;padding:34px;backdrop-filter:blur(6px)}
.hero-card ul{list-style:none;margin:0;padding:0;display:grid;gap:16px}
.hero-card li{display:flex;gap:14px;align-items:flex-start}
.hero-card li b{display:block;color:#fff}
.hero-card li small{color:#bfdcd8;font-size:.88rem}
.tick{flex:none;width:30px;height:30px;border-radius:50%;background:var(--accent);display:grid;place-items:center}
.tick svg{width:16px;height:16px;stroke:#2b1a00}

/* İstatistik şeridi */
.stats{margin-top:-56px;position:relative;z-index:5}
.stats .grid{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.stat{padding:30px 20px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border:0}
.stat b{display:block;font-family:var(--font-head);font-size:2.3rem;color:var(--primary)}
.stat span{color:var(--muted);font-weight:600;font-size:.92rem}

/* Kartlar */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:32px;transition:.25s;height:100%}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.ico{width:58px;height:58px;border-radius:16px;background:var(--primary-soft);display:grid;place-items:center;margin-bottom:20px}
.ico svg{width:28px;height:28px;stroke:var(--primary);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.card p{color:var(--muted);font-size:.96rem}
.more{font-weight:700;font-size:.92rem}
.about-visual{background:linear-gradient(145deg,var(--primary),var(--primary-dark));border-radius:30px;aspect-ratio:1/1;display:grid;place-items:center;position:relative;overflow:hidden}
.about-visual img{width:62%;filter:drop-shadow(0 10px 30px rgba(0,0,0,.25))}
.about-visual::after{content:"";position:absolute;right:-40px;bottom:-40px;width:200px;height:200px;border-radius:50%;background:var(--accent);opacity:.9}
.checks{list-style:none;padding:0;margin:20px 0 28px;display:grid;gap:12px}
.checks li{display:flex;gap:12px;align-items:flex-start;font-weight:500}
.mv{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.mv .card{border-top:5px solid var(--accent)}

/* Referans */
.ref{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;gap:18px;align-items:center}
.ref .badge{flex:none;width:62px;height:62px;border-radius:16px;background:var(--primary-soft);display:grid;place-items:center;overflow:hidden}
.ref .badge img{width:100%;height:100%;object-fit:cover}
.ref small{color:var(--muted)}
.ref h3{margin:0 0 2px;font-size:1.05rem}

/* CTA */
.cta-band{background:linear-gradient(110deg,var(--accent),#fbbf24);border-radius:30px;padding:54px;display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap}
.cta-band h2{color:#2b1a00;margin:0 0 6px}
.cta-band p{margin:0;color:#4a3000}

/* Sayfa başlığı */
.page-hero{background:linear-gradient(120deg,var(--primary-dark),var(--primary));color:#fff;padding:70px 0}
.page-hero h1{color:#fff;font-size:clamp(1.9rem,4vw,2.8rem);margin-bottom:6px}
.page-hero p{margin:0;color:#cfe6e3}
.crumbs{font-size:.85rem;color:#a9cfca;margin-bottom:10px}
.crumbs a{color:#fff}

/* İçerik */
.prose p{color:#35514e}
.prose{font-size:1.04rem}
.side-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;position:sticky;top:100px}
.layout{display:grid;grid-template-columns:1fr 340px;gap:40px;align-items:start}
.side-box ul{list-style:none;margin:0 0 18px;padding:0}
.side-box li a{display:block;padding:11px 14px;border-radius:12px;color:var(--ink);font-weight:600}
.side-box li a:hover,.side-box li a.active{background:var(--primary-soft)}

/* Form */
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label.f{display:block;font-weight:600;font-size:.88rem;margin:0 0 6px}
.fi{width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:12px;font:inherit;background:#fbfdfc;margin-bottom:16px;transition:.15s}
.fi:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-soft);background:#fff}
textarea.fi{min-height:140px;resize:vertical}
.alert{padding:14px 18px;border-radius:12px;margin-bottom:18px;font-weight:600}
.alert.ok{background:#dcfce7;color:#166534}.alert.err{background:#fee2e2;color:#991b1b}
.hp{position:absolute;left:-9999px;opacity:0}
.info-list{list-style:none;padding:0;margin:0;display:grid;gap:18px}
.info-list li{display:flex;gap:16px}
.info-list .ico{margin:0;flex:none}
.info-list b{display:block}
.map{border-radius:var(--radius);overflow:hidden;margin-top:26px;border:1px solid var(--line)}
.map iframe{width:100%;height:320px;border:0;display:block}

/* Footer */
footer.site{background:#082f2c;color:#a9cfca;padding:70px 0 0}
footer.site h4{color:#fff;font-family:var(--font-body);font-size:1rem;margin-bottom:18px}
footer.site a{color:#a9cfca}footer.site a:hover{color:var(--accent)}
.f-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:50px}
.f-grid img{height:50px;margin-bottom:16px}
.f-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.copy{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;font-size:.86rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.wa{position:fixed;right:20px;bottom:20px;z-index:60;width:58px;height:58px;border-radius:50%;background:#25d366;display:grid;place-items:center;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.wa svg{width:30px;height:30px;fill:#fff}

/* Kurumsal kimlik sayfası */
.swatches{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.sw{border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#fff}
.sw i{display:block;height:110px}
.sw div{padding:12px 14px;font-size:.85rem}
.sw b{display:block}
.logo-tiles{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.tile{border-radius:20px;padding:44px;display:grid;place-items:center;border:1px solid var(--line)}
.tile img{max-width:300px;width:100%}
.tile.dark{background:var(--primary-dark)}
.type-sample{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px}

/* Reveal */
.rv{opacity:0;transform:translateY(24px);transition:.7s}
.rv.in{opacity:1;transform:none}

/* Mobil */
@media(max-width:960px){
  .hero .container,.grid-2,.layout{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr 1fr}
  .stats .grid{grid-template-columns:1fr 1fr}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .f-grid{grid-template-columns:1fr 1fr}
  .swatches{grid-template-columns:repeat(3,1fr)}
  .side-box{position:static}
  .burger{display:block}
  .menu{position:absolute;left:0;right:0;top:78px;background:#fff;flex-direction:column;align-items:stretch;padding:14px 4vw 24px;border-bottom:1px solid var(--line);display:none}
  .menu.open{display:flex}
  .menu .cta a{margin:8px 0 0;text-align:center}
}
@media(max-width:620px){
  .section{padding:60px 0}
  .grid-3,.mv,.f-row,.f-grid,.logo-tiles{grid-template-columns:1fr}
  .swatches{grid-template-columns:1fr 1fr}
  .topbar .container{justify-content:center}
  .cta-band{padding:34px 26px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}.rv{opacity:1;transform:none}html{scroll-behavior:auto}}