/* ========== Temel ========== */
:root{
  --bg:#0f172a;        /* koyu lacivert arka plan */
  --ink:#0b1220;       /* daha koyu ton */
  --text:#0f172a;      /* içerik yazı rengi (açık alanlarda) */
  --muted:#475569;     /* ikincil metin */
  --brand:#0ea5e9;     /* mavi/cyan vurgu */
  --brand-ink:#0369a1; /* koyu vurgu */
  --paper:#ffffff;     /* kart/arka plan */
  --paper-2:#f8fafc;   /* alternatif arka plan */
  --ring: rgba(14,165,233,.35);
  --radius: 18px;
  --shadow: 0 10px 30px rgba(2,8,23,.15);
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'Apple Color Emoji', 'Segoe UI Emoji';
  line-height:1.6;
  color:var(--text);
  background:var(--paper-2);
}

/* ========== Yapı ========== */
.container{
  width:min(1100px, 92%);
  margin-inline:auto;
}

.section{
  padding: 72px 0;
}

.section-alt{
  background:var(--paper);
}

/* ========== Header/Nav ========== */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,.8);
  backdrop-filter:saturate(1.2) blur(8px);
  border-bottom:1px solid #e5e7eb;
}

.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
}

.brand{
  font-weight:800; letter-spacing:.2px; text-decoration:none; color:var(--text);
}

.nav{ display:flex; gap:18px; }
.nav a{
  text-decoration:none; color:var(--text); font-weight:600;
  padding:8px 12px; border-radius:12px;
}
.nav a:hover{ background:#f1f5f9; }

.nav-toggle{
  display:none; border:0; background:transparent; font-size:24px; line-height:1;
}

@media (max-width: 760px){
  .nav-toggle{ display:block; }
  .nav{
    position:absolute; top:60px; right:4%;
    flex-direction:column; gap:8px;
    background:var(--paper);
    padding:12px; border-radius:14px; box-shadow:var(--shadow);
    display:none;
  }
  .nav.show{ display:flex; }
}

/* ========== Hero ========== */
.hero{
  position:relative;
  min-height: 70vh;
  display:grid; place-items:center;
  background-image: url('assets/hero.jpg'); /* BURAYA kendi kahraman görselinizi koyun */
  background-size: cover;
  background-position: center;
  border-bottom:1px solid #e2e8f0;
}
.hero-overlay{
  position:absolute; inset:0;
  background:transparent;
}
.hero-content{
  position:relative; z-index:1; text-align:center; color:white;
  padding: 80px 0 60px;
}
.hero h1{ font-size: clamp(28px, 4.2vw, 52px); margin:0 0 8px; }
.hero p{ font-size: clamp(16px, 2.2vw, 20px); opacity:.95; margin:0 0 24px; }

.cta-group{ display:flex; gap:12px; justify-content:center; flex-wrap:wrap; }

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 18px; border-radius:14px; text-decoration:none; border:2px solid transparent;
  font-weight:700; cursor:pointer; transition:transform .05s ease, box-shadow .15s ease, background .15s ease;
  box-shadow: 0 6px 14px rgba(2,8,23,.12);
}
.btn:active{ transform:translateY(1px); }
.btn-primary{ background:var(--brand); color:white; }
.btn-primary:hover{ background:var(--brand-ink); }
.btn-outline{ background:transparent; color:white; border-color:rgba(255,255,255,.7); }
.btn-outline:hover{ background:rgba(255,255,255,.1); }

/* ========== Grid/Cards ========== */
.grid-2{
  display:grid; gap:28px;
  grid-template-columns: 1.3fr 1fr;
}
@media (max-width: 900px){
  .grid-2{ grid-template-columns:1fr; }
}

.card{
  background:var(--paper); border-radius:var(--radius); padding:22px;
  box-shadow: var(--shadow); border:1px solid #e5e7eb;
}

.checks{ padding:0; margin:16px 0 0; list-style:none; }
.checks li{ margin:8px 0; padding-left:26px; position:relative; }
.checks li::before{
  content:'✓'; position:absolute; left:0; top:0; color:#16a34a; font-weight:900;
}

.list{ padding-left:18px; margin:10px 0 0; }
.list li{ margin:6px 0; }

/* ========== Contact ========== */
.contact-cards{
  display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin-top:18px;
}
.contact-card{
  display:flex; flex-direction:column; gap:6px;
  background:var(--paper); border:1px solid #e5e7eb; border-radius:14px; padding:14px;
  text-decoration:none; color:inherit;
}
.contact-title{ font-size:12px; color:var(--muted); text-transform:uppercase; letter-spacing:.08em; }
.contact-value{ font-size:16px; font-weight:700; }

@media (max-width: 760px){
  .contact-cards{ grid-template-columns:1fr; }
}

/* ========== Footer ========== */
.site-footer{
  border-top:1px solid #e5e7eb; background:var(--paper);
}
.footer-inner{
  display:flex; align-items:center; justify-content:space-between; padding:18px 0;
}
.backtop{
  width:36px; height:36px; display:grid; place-items:center; border-radius:50%;
  background:#e2e8f0; text-decoration:none; color:#0f172a; font-weight:900;
}
.backtop:hover{ background:#cbd5e1; }

/* ========== Form ========== */
.form label{ display:block; font-weight:600; margin:12px 0 6px; }
.form input, .form textarea{
  width:100%; padding:12px 14px; border-radius:12px; border:1px solid #cbd5e1; outline:0; font:inherit;
  box-shadow:inset 0 1px 0 rgba(2,8,23,.02);
}
.form input:focus, .form textarea:focus{ border-color:var(--brand); box-shadow:0 0 0 4px var(--ring); }
.form-note{ color:var(--muted); font-size:12px; margin-top:8px; }

/* ========== Alerts ========== */
.alert{
  margin: 10px 0 0;
  padding: 12px 14px;
  border-radius: 12px;
  border:1px solid #cbd5e1;
  background:#ecfeff;
  color:#0f172a;
  box-shadow: inset 0 1px 0 rgba(2,8,23,.02);
}
.alert.success{
  border-color:#86efac;
  background:#f0fdf4;
}
.hidden{ display:none; }

/* ===== Topbar ===== */
.topbar{ background:#0b0f17; color:#cbd5e1; font-size:14px; }
.topbar a{ color:#cbd5e1; text-decoration:none; }
.topbar-inner{ display:flex; align-items:center; justify-content:space-between; padding:8px 0; }
.topbar .dot{ opacity:.6; margin:0 8px; }
.topbar-link{ margin-left:16px; }

/* ===== Header/Nav tweaks ===== */
.site-header{ background:rgba(12,17,27,.85); color:white; border-bottom:0; }
.brand{ color:white; }
.nav a{ color:white; opacity:.9; }
.nav a:hover{ background:rgba(255,255,255,.08); }
.btn.btn-nav{ margin-left:12px; padding:10px 14px; border-radius:12px; background:#e11d48; color:#fff; font-weight:800; text-decoration:none; box-shadow:0 6px 14px rgba(225,29,72,.3); }
.btn.btn-nav:hover{ background:#be123c; }

/* ===== Hero like ersag style ===== */
.hero{
  background-image: url('assets/hero.jpg');
  background-size: cover;
  background-position: center;
  min-height: 78vh;
  position: relative;
}
.hero-overlay{
  position:absolute; inset:0;
  background: radial-gradient(1200px 600px at 15% 40%, rgba(239,68,68,.35), transparent 60%),
              linear-gradient(0deg, rgba(2,6,23,.55), rgba(2,6,23,.35));
}
.hero-content{ text-align:left; }
.hero-left{ display:flex; flex-direction:column; align-items:flex-start; gap:16px; }
.hero-left h1{ font-size: clamp(36px, 6vw, 64px); font-weight:900; margin:0; color:#fff; text-shadow: 0 2px 18px rgba(0,0,0,.45); }
.hero-left p{ color:#e2e8f0; max-width:620px; }
.cta-group .btn-primary{ background:#0ea5e9; }
.cta-group .btn-outline{ border-color:#ffffff; color:#fff; }

/* ===== FABs ===== */
.fabs{ position:fixed; right:18px; bottom:18px; display:flex; flex-direction:column; gap:12px; z-index:60; }
.fab{ width:48px; height:48px; display:grid; place-items:center; background:#ef4444; border-radius:50%; text-decoration:none; font-size:22px; color:#fff; box-shadow:0 12px 28px rgba(0,0,0,.25); }
.fab:nth-child(2){ background:#22c55e; }
.fab:hover{ transform:translateY(-1px); }

/* Nav responsive contrast */
@media (max-width: 760px){
  .site-header{ background:rgba(12,17,27,.92); }
}

/* ===== Right-side social buttons (ERSA style) ===== */
.rs-social{
  position:fixed;
  top:50%;
  right:18px;
  transform:translateY(-50%);
  display:flex;
  flex-direction:column;
  gap:18px;
  z-index:1000;
}
.rs-btn{
  width:54px;
  height:54px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:14px;
  color:#fff;
  text-decoration:none;
  box-shadow:
    0 10px 18px rgba(0,0,0,.25),
    0 2px 0 rgba(0,0,0,.08) inset;
  transition:transform .15s ease, box-shadow .15s ease, filter .15s ease;
}
.rs-btn:hover{
  transform:translateY(-2px);
  box-shadow:
    0 16px 28px rgba(0,0,0,.32),
    0 2px 0 rgba(255,255,255,.05) inset;
  filter:saturate(1.05);
}
.rs-phone{ background:#ef4444; }
.rs-whatsapp{ background:#25D366; }
.rs-instagram{
  background:
    radial-gradient(circle at 30% 30%, #feda75, #d62976 45%, #962fbf 70%, #4f5bd5 100%);
}
@media (max-width: 860px){
  .rs-social{ right:12px; gap:12px; }
  .rs-btn{ width:48px; height:48px; border-radius:12px; }
}