/* --- DEĞİŞKENLER --- */
:root {
    --steel: #1e3a5f;
    --gold: #d4a853;
    --ink: #0f1117;
    --paper: #f5f2ec;
    --white: #ffffff;
    --slate: #4a5568;
    --border: #e2e8f0;
}

/* --- GENEL --- */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Manrope', sans-serif; background: var(--white); color: var(--ink); line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* --- NAVIGATION --- */
nav { background: var(--white); padding: 25px 0; position: sticky; top: 0; z-index: 1000; box-shadow: 0 10px 30px rgba(0,0,0,0.05); }
nav .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-family: 'Playfair Display', serif; font-size: 28px; font-weight: 900; color: var(--steel); text-decoration: none; }
.logo span { color: var(--gold); }
.nav-links { display: flex; gap: 35px; list-style: none; }
.nav-links a { text-decoration: none; color: var(--steel); font-weight: 700; font-size: 13px; text-transform: uppercase; letter-spacing: 1px; }
.nav-links a:hover { color: var(--gold); }

/* --- HERO --- */
.hero { 
    height: 85vh; 
    background: linear-gradient(to right, rgba(15, 17, 23, 0.8) 30%, rgba(15, 17, 23, 0.2)), url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?q=80&w=2070'); 
    background-size: cover; background-position: center; display: flex; align-items: center; color: var(--white);
}
.hero h1 { font-family: 'Playfair Display', serif; font-size: clamp(40px, 6vw, 75px); line-height: 1.1; margin-bottom: 30px; }
.hero h1 span { color: var(--gold); }
.hero p { font-size: 18px; color: rgba(255,255,255,0.8); margin-bottom: 40px; max-width: 550px; }

/* --- BUTONLAR --- */
.btn { display: inline-block; padding: 18px 40px; font-weight: 800; text-decoration: none; text-transform: uppercase; font-size: 12px; transition: 0.4s; cursor: pointer; border-radius: 4px; border:none; }
.btn-gold { background: var(--gold); color: var(--steel); border: 2px solid var(--gold); }
.btn-outline { background: rgba(255,255,255,0.1); color: white; border: 1px solid white; margin-left: 10px; }

/* --- STATS HUB --- */
.op-hub { background: var(--white); margin-top: -60px; position: relative; z-index: 10; box-shadow: 0 20px 50px rgba(0,0,0,0.1); border-bottom: 5px solid var(--gold); }
.op-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.op-item { padding: 30px; border-right: 1px solid #eee; }
.op-label { font-size: 10px; font-weight: 800; text-transform: uppercase; color: var(--slate); display: block; margin-bottom: 10px; letter-spacing: 1px; }
.op-value { font-size: 18px; font-weight: 700; color: var(--steel); }

/* --- ÇÖZÜMLER --- */
.section { padding: 100px 0; }
.solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.solution-card { background: var(--white); transition: 0.4s; border-bottom: 4px solid transparent; overflow: hidden; text-decoration: none; display: block; }
.solution-img { height: 350px; overflow: hidden; background: #eee; }
.solution-img img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(100%); transition: 0.8s; }
.solution-card:hover .solution-img img { filter: grayscale(0); transform: scale(1.05); }
.solution-content { padding: 25px; text-align: center; }
.solution-content h3 { font-family: 'Playfair Display', serif; font-size: 24px; color: var(--steel); }

/* --- HESAP MAKİNESİ MODAL --- */
#calcModal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(15, 23, 42, 0.9); z-index: 9999; align-items: center; justify-content: center; padding: 20px; }
.modal-content { background: white; width: 100%; max-width: 800px; padding: 40px; border-radius: 20px; position: relative; max-height: 90vh; overflow-y: auto; color: var(--steel); }
.close-modal { position: absolute; right: 25px; top: 20px; cursor: pointer; font-size: 30px; color: #94a3b8; }
.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.full-width { grid-column: span 2; }
.calc-label { display: block; font-size: 11px; font-weight: 800; color: #1e3a5f; margin-bottom: 8px; text-transform: uppercase; }
.calc-input { width: 100%; padding: 12px; border: 2px solid var(--border); border-radius: 8px; font-weight: bold; font-family: inherit; }
.product-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; background: #f8fafc; padding: 20px; border-radius: 12px; border: 1px solid var(--border); }
.product-item { display: flex; align-items: center; justify-content: space-between; background: white; padding: 10px; border-radius: 8px; border: 1px solid #edf2f7; }

/* --- FOOTER --- */
footer { background: var(--ink); color: rgba(255,255,255,0.4); padding: 60px 0; text-align: center; margin-top: 50px; }