/* MARZEM MÜHENDİSLİK - Premium Design System */
/* Renk paleti — MARZEM logo renkleriyle uyumlu
   Logo: Koyu Gri (#595959) + Lime Yeşil (#7DC420) */
:root {
    --primary: hsl(215, 14%, 20%);       /* Koyu gri-lacivert — logo griyle uyumlu */
    --primary-light: hsl(215, 12%, 32%);
    --primary-dark: hsl(215, 18%, 10%);
    --accent: hsl(86, 58%, 44%);         /* Logo yeşili — #7DC420 */
    --accent-hover: hsl(86, 62%, 36%);   /* Koyu yeşil hover */
    --gold: hsl(80, 55%, 52%);           /* Açık yeşil vurgu */
    --text-main: hsl(215, 10%, 18%);
    --text-light: hsl(215, 8%, 44%);
    --white: #ffffff;
    --bg-light: #f5f7fa;
    --border: #e2e8f0;
    --container: 1400px;
    --header-h: 80px;
    --shadow-sm: 0 4px 15px rgba(0,0,0,0.03);
    --shadow-md: 0 10px 30px rgba(0,0,0,0.06);
    --shadow-lg: 0 20px 50px rgba(0,0,0,0.1);
    --font-h: 'Syne', 'Inter', sans-serif;
    --font-b: 'Inter', sans-serif;
    --radius: 14px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:var(--font-b);color:var(--text-main);line-height:1.65;background:var(--white);overflow-x:hidden;}
h1,h2,h3,h4,h5,h6{font-family:var(--font-h);color:var(--primary);font-weight:700;line-height:1.2;margin-bottom:0.8rem;}
a{text-decoration:none;color:inherit;transition:all .3s;}
ul{list-style:none;}
img{max-width:100%;height:auto;display:block;}
.container{max-width:var(--container);margin:0 auto;padding:0 1.5rem;}
.section-pad{padding:90px 0;}
.text-center{text-align:center;}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:6px;font-weight:700;font-size:.9rem;text-transform:uppercase;letter-spacing:.5px;transition:all .3s;cursor:pointer;border:none;}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 14px rgba(0,150,180,.3);}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-3px);box-shadow:0 8px 22px rgba(0,150,180,.4);}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary);}
.btn-outline:hover{background:var(--primary);color:#fff;}
.btn-white{background:#fff;color:var(--primary);}
.btn-white:hover{background:var(--gold);color:var(--primary-dark);transform:translateY(-3px);}
.btn-gold{background:var(--gold);color:var(--primary-dark);}
.btn-gold:hover{background:hsl(42,90%,44%);transform:translateY(-3px);}

/* SECTION TITLES */
.sec-label{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--accent);background:rgba(0,150,180,.1);padding:5px 14px;border-radius:20px;margin-bottom:14px;}
.sec-title{font-size:2.6rem;font-weight:800;color:var(--primary);margin-bottom:.6rem;letter-spacing:-.5px;}
.sec-sub{font-size:1.05rem;color:var(--text-light);max-width:580px;margin:0 auto;}

/* HEADER */
.main-header{height:var(--header-h);background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 2px 16px rgba(0,0,0,.06);position:fixed;width:100%;top:0;z-index:1000;transition:all .3s;}
.main-header.scrolled{background:rgba(255,255,255,.98);box-shadow:0 3px 20px rgba(0,0,0,.1);}
.nav-wrap{display:flex;justify-content:space-between;align-items:center;height:var(--header-h);max-width:var(--container);margin:0 auto;padding:0 1.5rem;gap:20px;}
.logo{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.logo img{height:54px;width:auto;}
.logo-text{font-family:var(--font-h);font-size:1.8rem;font-weight:900;color:var(--primary);letter-spacing:1.5px;line-height:0.95;display:flex;flex-direction:column;}
.logo-text .logo-sub{display:flex;justify-content:space-between;width:100%;color:var(--accent);font-size:0.76rem;font-weight:700;margin-top:4px;text-transform:uppercase;letter-spacing:0;}
.logo-text .logo-sub span{letter-spacing:0;padding:0;margin:0;font-size:inherit;font-weight:inherit;color:inherit;}
.nav-links{display:flex;gap:2px;align-items:center;}
.nav-links a{padding:8px 14px;border-radius:6px;font-weight:600;font-size:.88rem;color:var(--text-main);transition:all .25s;white-space:nowrap;}
.nav-links a:hover,.nav-links a.active{color:var(--accent);background:rgba(0,150,180,.08);}
.nav-cta{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.header-phone{display:flex;align-items:center;gap:7px;color:var(--primary);font-weight:700;font-size:.9rem;white-space:nowrap;}
.header-phone i{color:var(--accent);}
.mobile-toggle{display:none;background:none;border:2px solid var(--border);color:var(--primary);padding:7px 10px;border-radius:6px;font-size:1.2rem;cursor:pointer;}

/* HERO */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 60%,hsl(210,60%,25%) 100%);padding-top:var(--header-h);overflow:hidden;}
.hero::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:60px 0;}
.hero-text{color:#fff;}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);padding:7px 16px;border-radius:30px;font-size:.82rem;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:rgba(255,255,255,.9);margin-bottom:22px;backdrop-filter:blur(4px);}
.hero-badge i{color:var(--gold);}
.hero h1{font-size:3.8rem;font-weight:800;color:#fff;line-height:1.05;margin-bottom:20px;letter-spacing:-1px;}
.hero h1 span{color:var(--gold);}
.hero-desc{font-size:1.1rem;opacity:.88;margin-bottom:32px;line-height:1.7;max-width:520px;}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;}
.hero-trust{display:flex;gap:20px;margin-top:40px;padding-top:32px;border-top:1px solid rgba(255,255,255,.12);}
.trust-item{display:flex;align-items:center;gap:8px;}
.trust-item i{color:var(--gold);font-size:1.1rem;}
.trust-item span{font-size:.85rem;opacity:.85;font-weight:500;}
.hero-visual{position:relative;}
.hero-card-stack{position:relative;height:480px;}
.hero-img-main{width:100%;height:380px;background:linear-gradient(135deg,rgba(255,255,255,.05),rgba(255,255,255,.12));border-radius:var(--radius);border:1px solid rgba(255,255,255,.15);display:flex;flex-direction:column;align-items:center;justify-content:center;color:rgba(255,255,255,.6);font-size:.85rem;gap:12px;backdrop-filter:blur(4px);}
.hero-img-main i{font-size:3.5rem;color:rgba(255,255,255,.25);}
.hero-stat-card{position:absolute;background:#fff;border-radius:10px;padding:16px 22px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:12px;}
.hero-stat-card.card1{bottom:60px;left:-30px;}
.hero-stat-card.card2{top:20px;right:-20px;}
.hero-stat-icon{width:44px;height:44px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent-hover));display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;}
.hero-stat-num{font-family:var(--font-h);font-size:1.5rem;font-weight:800;color:var(--primary);line-height:1;}
.hero-stat-label{font-size:.75rem;color:var(--text-light);font-weight:500;}

/* STATS BAR */
.stats-bar{background:linear-gradient(135deg,var(--primary-dark),hsl(215,14%,24%));padding:60px 0;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;}
.stat-card{padding:28px 20px;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);transition:.3s;}
.stat-card:hover{background:rgba(255,255,255,.05);transform:translateY(-4px);}
.stat-num{font-family:var(--font-h);font-size:3rem;font-weight:800;color:var(--gold);display:block;}
.stat-label{font-size:.9rem;color:rgba(255,255,255,.75);text-transform:uppercase;letter-spacing:1px;font-weight:500;}

/* MODERN INNER HEADER (Replaces old page-hero) */
.inner-header {
    background: linear-gradient(180deg, var(--white) 0%, var(--bg-light) 100%);
    padding: 100px 0 20px;
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}
.inner-header::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--gold));
}
.breadcrumb {
    display: flex;
    gap: 10px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.breadcrumb a {
    color: var(--primary);
    transition: 0.3s;
}
.breadcrumb a:hover {
    color: var(--accent);
}
.breadcrumb span {
    color: var(--border);
}
.inner-header h1 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}
.inner-header p {
    font-size: 1rem;
    color: var(--text-light);
    max-width: 650px;
    line-height: 1.6;
}

/* PREMIUM ICON CARDS */
.icon-box-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}
.icon-box {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 30px;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    position: relative;
    overflow: hidden;
}
.icon-box::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; width: 100%; height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--gold));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s;
}
.icon-box:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.icon-box:hover::after {
    transform: scaleX(1);
}
.icon-box i {
    font-size: 2.5rem;
    background: -webkit-linear-gradient(45deg, var(--accent), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
    display: inline-block;
}
.icon-box h3 {
    font-size: 1.25rem;
    margin-bottom: 14px;
    color: var(--primary);
}
.icon-box p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* SERVICES GRID */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-top:48px;}
.svc-card{background:#fff;border:1px solid rgba(0,0,0,0.04);border-radius:var(--radius);padding:40px 32px;transition:all .4s;position:relative;overflow:hidden;box-shadow:var(--shadow-sm);}
.svc-card::before{content:'';position:absolute;top:0;left:0;width:4px;height:100%;background:linear-gradient(180deg, var(--accent), var(--gold));transform:scaleY(0);transition:.4s;transform-origin:bottom;}
.svc-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent;}
.svc-card:hover::before{transform:scaleY(1);}
.svc-icon{width:64px;height:64px;border-radius:14px;background:rgba(0,150,180,.05);display:flex;align-items:center;justify-content:center;font-size:1.8rem;color:var(--accent);margin-bottom:24px;transition:.4s;}
.svc-card:hover .svc-icon{background:var(--accent);color:#fff;transform:scale(1.1);}
.svc-card h3{font-family:var(--font-h);font-size:1.4rem;margin-bottom:12px;color:var(--primary);font-weight:700;}
.svc-card p{font-size:.9rem;color:var(--text-light);line-height:1.7;}
.svc-card .svc-link{display:inline-flex;align-items:center;gap:6px;font-size:.85rem;font-weight:700;color:var(--accent);margin-top:20px;opacity:0.8;transition:.3s;}
.svc-card:hover .svc-link{opacity:1;transform:translateX(6px);}

/* PROJECTS */
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px;}
.proj-card{border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:.35s;}
.proj-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);}
.proj-img{width:100%;height:220px;background:linear-gradient(135deg,var(--bg-light),var(--border));display:flex;align-items:center;justify-content:center;flex-direction:column;gap:8px;color:var(--text-light);font-size:.8rem;position:relative;overflow:hidden;}
.proj-img i{font-size:2.5rem;opacity:.3;}
.proj-badge{position:absolute;top:12px;right:12px;background:var(--accent);color:#fff;padding:4px 12px;border-radius:20px;font-size:.73rem;font-weight:700;text-transform:uppercase;}
.proj-body{padding:22px;}
.proj-body h3{font-size:1.05rem;margin-bottom:10px;color:var(--primary);}
.proj-meta{display:flex;flex-direction:column;gap:5px;padding-top:12px;border-top:1px solid var(--border);}
.proj-meta span{font-size:.82rem;color:var(--text-light);display:flex;align-items:center;gap:7px;}
.proj-meta i{color:var(--accent);width:14px;}

/* CTA BANNER */
.cta-banner{background:linear-gradient(135deg,var(--primary-dark),var(--primary));padding:80px 0;text-align:center;position:relative;overflow:hidden;}
.cta-banner::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 30% 50%,rgba(0,150,180,.2),transparent 60%);}
.cta-banner h2{color:#fff;font-size:2.4rem;margin-bottom:14px;}
.cta-banner p{color:rgba(255,255,255,.8);font-size:1.05rem;max-width:520px;margin:0 auto 32px;}
.cta-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}

/* REFERENCES SLIDER */
.ref-section{padding:60px 0;background:var(--bg-light);}
.ref-track-wrap{overflow:hidden;position:relative;}
.ref-track-wrap::before,.ref-track-wrap::after{content:'';position:absolute;top:0;bottom:0;width:80px;z-index:2;}
.ref-track-wrap::before{left:0;background:linear-gradient(to right,var(--bg-light),transparent);}
.ref-track-wrap::after{right:0;background:linear-gradient(to left,var(--bg-light),transparent);}
.ref-track{display:flex;gap:40px;animation:slide 30s linear infinite;width:max-content;}
.ref-track:hover{animation-play-state:paused;}
@keyframes slide{0%{transform:translateX(0);}100%{transform:translateX(-50%);}}
.ref-logo{height:50px;width:auto;filter:grayscale(100%);opacity:.5;transition:.3s;}
.ref-logo:hover{filter:none;opacity:1;}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px;margin-top:40px;max-width:860px;margin-left:auto;margin-right:auto;}
.faq-item{border:1px solid var(--border);border-radius:10px;overflow:hidden;background:#fff;transition:.3s;}
.faq-item.open{box-shadow:var(--shadow-md);border-color:var(--accent);}
.faq-q{width:100%;padding:20px 22px;background:none;border:none;text-align:left;font-family:var(--font-h);font-size:1rem;font-weight:700;color:var(--primary);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;}
.faq-q i{color:var(--accent);transition:.3s;flex-shrink:0;}
.faq-item.open .faq-q i{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;}
.faq-a p{padding:0 22px 20px;color:var(--text-light);line-height:1.75;font-size:.95rem;}

/* FOOTER */
footer{background:var(--primary-dark);color:#fff;padding:70px 0 30px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px;}
.footer-brand p{font-size:.88rem;opacity:.65;margin-top:12px;line-height:1.7;}
footer h4{font-size:1rem;font-weight:700;margin-bottom:18px;color:#fff;position:relative;padding-bottom:10px;}
footer h4::after{content:'';position:absolute;left:0;bottom:0;width:32px;height:2px;background:var(--accent);}
.footer-links li{margin-bottom:9px;}
.footer-links a{font-size:.88rem;opacity:.65;transition:.25s;}
.footer-links a:hover{opacity:1;color:var(--gold);}
.footer-contact p{font-size:.88rem;opacity:.7;display:flex;align-items:flex-start;gap:10px;margin-bottom:10px;line-height:1.6;}
.footer-contact i{color:var(--accent);margin-top:3px;flex-shrink:0;}
.footer-social{display:flex;gap:10px;margin-top:16px;}
.footer-social a{width:38px;height:38px;border-radius:8px;background:rgba(255,255,255,.07);display:flex;align-items:center;justify-content:center;font-size:1rem;transition:.3s;}
.footer-social a:hover{background:var(--accent);transform:translateY(-3px);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:.82rem;opacity:.5;}

/* MOBILE MENU */
.mobile-nav{display:none;flex-direction:column;background:#fff;border-top:1px solid var(--border);padding:16px;gap:4px;}
.mobile-nav.open{display:flex;}
.mobile-nav a{padding:12px 16px;border-radius:8px;font-weight:600;color:var(--text-main);}
.mobile-nav a:hover{background:var(--bg-light);color:var(--accent);}

/* RESPONSIVE */
@media(max-width:1100px){
  .hero-inner{grid-template-columns:1fr;}.hero-visual{display:none;}
  .services-grid{grid-template-columns:repeat(2,1fr);}
  .projects-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
}
@media(max-width:768px){
  .sec-title{font-size:2rem;}.hero h1{font-size:2.6rem;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .services-grid, .projects-grid, .footer-grid, .icon-box-grid, .doc-grid {grid-template-columns:1fr;}
  .nav-links,.nav-cta .btn,.header-phone{display:none;}
  .mobile-toggle{display:block;}
  .hero-trust{flex-direction:column;gap:12px;}
  .cta-btns{flex-direction:column;align-items:center;}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center;}
  .inner-header {padding: 80px 0 16px;}
  .inner-header h1 {font-size: 1.8rem;}
  .logo-text {font-size: 1.3rem;}
  .logo img {height: 32px;}
}

/* FLOATING CTA */
.float-cta{position:fixed;bottom:28px;right:28px;z-index:900;display:flex;flex-direction:column;gap:10px;align-items:flex-end;}
.float-btn{display:flex;align-items:center;gap:8px;padding:12px 20px;border-radius:50px;font-weight:700;font-size:.85rem;box-shadow:var(--shadow-lg);transition:.3s;cursor:pointer;border:none;}
.float-btn.phone{background:var(--accent);color:#fff;}
.float-btn.whatsapp{background:#25D366;color:#fff;}
.float-btn:hover{transform:scale(1.06);}