/* IST Servisi - Premium Beyaz Eşya & Kombi Servisi */
/* Design System - Mobile First, PageSpeed 100 Optimized */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#0a1628;--primary-light:#1a3a5c;--primary-mid:#0f2847;
  --accent:#ff6b35;--accent-hover:#ff8c5a;--accent-dark:#e55a25;
  --success:#10b981;--success-light:#d1fae5;
  --surface:#f8fafc;--surface-alt:#f1f5f9;
  --text:#1e293b;--text-light:#64748b;--text-lighter:#94a3b8;
  --white:#ffffff;--border:#e2e8f0;
  --shadow-sm:0 1px 3px rgba(0,0,0,.08);--shadow-md:0 4px 20px rgba(0,0,0,.1);--shadow-lg:0 10px 40px rgba(0,0,0,.15);
  --glass:rgba(255,255,255,.06);--glass-border:rgba(255,255,255,.1);
  --radius:12px;--radius-sm:8px;--radius-lg:20px;
  --transition:all .3s cubic-bezier(.4,0,.2,1);
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;color:var(--text);line-height:1.7;background:var(--white);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit;transition:var(--transition)}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 40px}}

/* ===== TOP BAR ===== */
.top-bar{background:var(--primary);color:rgba(255,255,255,.85);padding:8px 0;font-size:13px}
.top-bar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.top-bar a{color:#fff;font-weight:600;transition:var(--transition)}
.top-bar a:hover{color:var(--accent)}
.top-bar-left{display:flex;align-items:center;gap:15px}
.top-bar-right{display:flex;align-items:center;gap:15px}
@media(max-width:600px){.top-bar .container{justify-content:center;text-align:center}.top-bar-left,.top-bar-right{width:100%;justify-content:center}}

/* ===== HEADER ===== */
.header{background:rgba(255,255,255,.95);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:1000;transition:var(--transition)}
.header.scrolled{box-shadow:var(--shadow-md)}
.header .container{display:flex;justify-content:space-between;align-items:center;padding-top:12px;padding-bottom:12px}
.logo{font-size:24px;font-weight:900;color:var(--primary);letter-spacing:-0.5px;display:flex;align-items:center;gap:8px}
.logo span{color:var(--accent)}
.header-nav{display:none;gap:24px;align-items:center}
.header-nav a{font-size:14px;font-weight:600;color:var(--text);position:relative;padding:4px 0}
.header-nav a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--accent);transition:var(--transition)}
.header-nav a:hover::after{width:100%}
@media(min-width:992px){.header-nav{display:flex}}
.btn-cta{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--accent),var(--accent-dark));color:#fff;padding:12px 24px;border-radius:var(--radius-sm);font-weight:700;font-size:14px;border:none;cursor:pointer;transition:var(--transition);box-shadow:0 4px 15px rgba(255,107,53,.3)}
.btn-cta:hover{transform:translateY(-2px);box-shadow:0 6px 25px rgba(255,107,53,.4);color:#fff}
.btn-cta-outline{background:transparent;border:2px solid var(--accent);color:var(--accent);box-shadow:none}
.btn-cta-outline:hover{background:var(--accent);color:#fff}
.hamburger{display:flex;flex-direction:column;gap:5px;cursor:pointer;padding:8px;background:none;border:none}
.hamburger span{width:24px;height:2px;background:var(--primary);transition:var(--transition);border-radius:2px}
@media(min-width:992px){.hamburger{display:none}}

/* ===== MOBILE MENU ===== */
.mobile-menu{position:fixed;top:0;right:-100%;width:300px;height:100vh;background:var(--primary);z-index:2000;padding:80px 30px 30px;transition:transform .4s cubic-bezier(.4,0,.2,1);transform:translateX(0)}
.mobile-menu.active{right:0}
.mobile-menu a{display:block;color:#fff;padding:14px 0;font-size:16px;font-weight:500;border-bottom:1px solid rgba(255,255,255,.08)}
.mobile-menu a:hover{color:var(--accent);padding-left:8px}
.mobile-menu-close{position:absolute;top:20px;right:20px;background:none;border:none;color:#fff;font-size:28px;cursor:pointer}
.mobile-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:1999}
.mobile-overlay.active{display:block}

/* ===== HERO ===== */
.hero{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-mid) 50%,var(--primary-light) 100%);color:#fff;padding:60px 0 70px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(255,107,53,.12) 0%,transparent 70%);border-radius:50%}
.hero::after{content:'';position:absolute;bottom:-30%;left:-10%;width:400px;height:400px;background:radial-gradient(circle,rgba(16,185,129,.08) 0%,transparent 70%);border-radius:50%}
.hero .container{position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:var(--glass);border:1px solid var(--glass-border);padding:8px 16px;border-radius:50px;font-size:13px;font-weight:500;margin-bottom:24px;color:rgba(255,255,255,.9)}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--success);animation:pulse-dot 2s infinite}
@keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{font-size:clamp(28px,5vw,48px);font-weight:900;line-height:1.15;margin-bottom:20px;letter-spacing:-1px}
.hero h1 .highlight{color:var(--accent);position:relative}
.hero p{font-size:clamp(15px,2vw,18px);color:rgba(255,255,255,.8);max-width:600px;margin-bottom:32px;line-height:1.8}
.hero-buttons{display:flex;flex-wrap:wrap;gap:12px}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:50px;padding-top:40px;border-top:1px solid rgba(255,255,255,.1)}
.hero-stat{text-align:center}
.hero-stat .number{font-size:clamp(28px,4vw,40px);font-weight:900;color:var(--accent)}
.hero-stat .label{font-size:13px;color:rgba(255,255,255,.6);margin-top:4px}

/* ===== BREADCRUMB ===== */
.breadcrumb{background:var(--surface);border-bottom:1px solid var(--border);padding:12px 0}
.breadcrumb-list{display:flex;align-items:center;flex-wrap:wrap;gap:8px;list-style:none;font-size:13px;color:var(--text-light)}
.breadcrumb-list a{color:var(--primary-light);font-weight:500}
.breadcrumb-list a:hover{color:var(--accent)}
.breadcrumb-list .sep{color:var(--text-lighter)}
.breadcrumb-list .current{color:var(--text);font-weight:600}

/* ===== TRUST BAR ===== */
.trust-bar{padding:40px 0;background:var(--white);border-bottom:1px solid var(--border)}
.trust-items{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px;text-align:center}
.trust-item{display:flex;flex-direction:column;align-items:center;gap:8px}
.trust-icon{font-size:32px}
.trust-title{font-size:14px;font-weight:700;color:var(--primary)}
.trust-desc{font-size:12px;color:var(--text-light)}

/* ===== SECTIONS ===== */
.section{padding:60px 0}
.section-alt{background:var(--surface)}
.section-dark{background:var(--primary);color:#fff}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:clamp(24px,4vw,36px);font-weight:800;color:var(--primary);margin-bottom:12px;letter-spacing:-0.5px}
.section-dark .section-title h2{color:#fff}
.section-title p{font-size:16px;color:var(--text-light);max-width:600px;margin:0 auto}
.section-dark .section-title p{color:rgba(255,255,255,.7)}

/* ===== SERVICE CARDS ===== */
.services-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.service-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:var(--transition);position:relative;overflow:hidden}
.service-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent-hover));transform:scaleX(0);transform-origin:left;transition:var(--transition)}
.service-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--accent)}
.service-card:hover::before{transform:scaleX(1)}
.service-card .icon{font-size:40px;margin-bottom:16px}
.service-card h3{font-size:18px;font-weight:700;color:var(--primary);margin-bottom:8px}
.service-card p{font-size:14px;color:var(--text-light);line-height:1.6}
.service-card .link{display:inline-flex;align-items:center;gap:4px;color:var(--accent);font-weight:600;font-size:14px;margin-top:12px}
.service-card .link:hover{gap:8px}

/* ===== BRAND GRID ===== */
.brands-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:16px}
.brand-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px 16px;text-align:center;transition:var(--transition);cursor:pointer}
.brand-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--accent)}
.brand-card .brand-name{font-size:15px;font-weight:700;margin-top:8px}
.brand-card .brand-type{font-size:11px;color:var(--text-lighter);margin-top:4px;text-transform:uppercase;letter-spacing:1px}

/* ===== DISTRICT GRID ===== */
.districts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.district-card{display:flex;align-items:center;gap:10px;background:var(--white);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;transition:var(--transition);font-weight:600;font-size:14px;color:var(--primary)}
.district-card:hover{border-color:var(--accent);background:linear-gradient(135deg,rgba(255,107,53,.03),rgba(255,107,53,.08));transform:translateX(4px);color:var(--accent)}
.district-card .arrow{margin-left:auto;opacity:0;transition:var(--transition)}
.district-card:hover .arrow{opacity:1}

/* ===== NEIGHBORHOOD LIST ===== */
.neighborhood-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.neighborhood-link{display:block;padding:10px 14px;background:var(--surface);border-radius:var(--radius-sm);font-size:13px;color:var(--text);transition:var(--transition);border:1px solid transparent}
.neighborhood-link:hover{background:var(--white);border-color:var(--accent);color:var(--accent);padding-left:18px}

/* ===== ARTICLE ===== */
.article{max-width:800px}
.article h1{font-size:clamp(24px,4vw,36px);font-weight:900;color:var(--primary);margin-bottom:20px;line-height:1.2;border-left:4px solid var(--accent);padding-left:16px}
.article h2{font-size:clamp(20px,3vw,26px);font-weight:700;color:var(--primary);margin:32px 0 16px;position:relative;padding-left:16px}
.article h2::before{content:'';position:absolute;left:0;top:4px;bottom:4px;width:3px;background:var(--accent);border-radius:2px}
.article h3{font-size:18px;font-weight:700;color:var(--primary-light);margin:24px 0 12px}
.article p{margin-bottom:16px;font-size:15px;line-height:1.8;color:var(--text)}
.article strong{color:var(--primary);font-weight:700}
.article ul,.article ol{margin:16px 0;padding-left:24px}
.article li{margin-bottom:8px;font-size:15px;line-height:1.7}

/* ===== SIDEBAR ===== */
.content-layout{display:grid;grid-template-columns:1fr;gap:40px}
@media(min-width:992px){.content-layout{grid-template-columns:1fr 320px}}
.sidebar{display:flex;flex-direction:column;gap:24px}
.sidebar-box{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:var(--transition)}
.sidebar-box:hover{box-shadow:var(--shadow-sm)}
.sidebar-box h3{font-size:16px;font-weight:700;color:var(--primary);margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--accent)}
.sidebar-cta{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;border:none;text-align:center}
.sidebar-cta h3{color:#fff;border-bottom-color:rgba(255,255,255,.2)}
.sidebar-cta p{color:rgba(255,255,255,.8);font-size:14px;margin-bottom:16px}
.sidebar-cta .phone{font-size:24px;font-weight:900;color:var(--accent);display:block;margin:12px 0}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:12px;overflow:hidden;transition:var(--transition)}
.faq-item:hover{border-color:var(--accent)}
.faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;padding:18px 20px;background:var(--white);border:none;cursor:pointer;font-size:15px;font-weight:600;color:var(--primary);text-align:left;transition:var(--transition);font-family:inherit}
.faq-question:hover{background:var(--surface)}
.faq-question .icon{font-size:18px;color:var(--accent);transition:var(--transition);flex-shrink:0}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-answer-inner{padding:0 20px 18px;font-size:14px;line-height:1.7;color:var(--text-light)}
.faq-item.active .faq-question{background:var(--surface)}
.faq-item.active .faq-question .icon{transform:rotate(45deg)}
.faq-item.active .faq-answer{max-height:300px}

/* ===== CTA SECTION ===== */
.cta-section{background:linear-gradient(135deg,var(--accent),var(--accent-dark));color:#fff;padding:60px 0;text-align:center}
.cta-section h2{font-size:clamp(24px,4vw,36px);font-weight:900;margin-bottom:16px;color:#fff}
.cta-section p{font-size:16px;opacity:.9;margin-bottom:32px;max-width:500px;margin-left:auto;margin-right:auto}
.cta-section .btn-cta{background:var(--white);color:var(--accent);box-shadow:0 4px 20px rgba(0,0,0,.2)}
.cta-section .btn-cta:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(0,0,0,.3)}

/* ===== FOOTER ===== */
.footer{background:var(--primary);color:rgba(255,255,255,.7);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:40px;padding-bottom:40px}
.footer-col h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:var(--accent)}
.footer-col p{font-size:13px;line-height:1.8;margin-bottom:12px}
.footer-col a{display:block;font-size:13px;padding:4px 0;transition:var(--transition)}
.footer-col a:hover{color:var(--accent);padding-left:6px}
.footer-col .phone-big{font-size:22px;font-weight:800;color:var(--accent);display:block;margin:8px 0}
.footer-districts{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:12px}
.footer-bottom a{color:var(--accent)}

/* ===== STICKY MOBILE CTA ===== */
.sticky-cta{display:none;position:fixed;bottom:0;left:0;right:0;background:var(--white);border-top:1px solid var(--border);padding:10px 16px;z-index:999;box-shadow:0 -4px 20px rgba(0,0,0,.1)}
.sticky-cta .btn-cta{width:100%;justify-content:center;font-size:16px;padding:14px}
@media(max-width:991px){.sticky-cta{display:block}}

/* ===== WHATSAPP BUTTON ===== */
.whatsapp-btn{position:fixed;bottom:80px;right:20px;width:56px;height:56px;background:#25D366;border-radius:50%;display:flex;align-items:center;justify-content:center;z-index:998;box-shadow:0 4px 20px rgba(37,211,102,.4);transition:var(--transition);color:#fff;font-size:28px}
.whatsapp-btn:hover{transform:scale(1.1);box-shadow:0 6px 30px rgba(37,211,102,.5)}
@media(min-width:992px){.whatsapp-btn{bottom:30px;right:30px}}

/* ===== UTILITIES ===== */
.text-accent{color:var(--accent)}
.text-center{text-align:center}
.mt-20{margin-top:20px}.mt-40{margin-top:40px}.mb-20{margin-bottom:20px}
.grid-2{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:768px){.grid-2{grid-template-columns:1fr 1fr}}

/* ===== ANIMATIONS (CSS only, no JS) ===== */
@media(prefers-reduced-motion:no-preference){
  .service-card,.brand-card,.district-card,.faq-item{animation:fadeInUp .5s ease both}
  @keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
}