/* --- DEĞİŞKENLER --- */
:root {
    --primary: #2E7D32;       /* Tarım Yeşili */
    --primary-dark: #1B5E20;
    --accent: #F57F17;        /* Turuncu */
    --dark: #0F172A;          /* Koyu Lacivert/Siyah */
    --text: #334155;          /* Gri Metin */
    --light: #F8FAFC;
    --white: #ffffff;
    --font: 'Poppins', sans-serif;
    --shadow: 0 10px 40px -10px rgba(0,0,0,0.1);
}

/* --- GENEL --- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; touch-action: manipulation; }
body { font-family: var(--font); color: var(--text); line-height: 1.6; overflow-x: hidden; background: var(--white); }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }

/* --- NAVBAR (ÜST MENÜ) --- */
.navbar {
    position: fixed; top: 0; left: 0; width: 100%;
    background-color: #ffffff; /* SÜREKLİ BEYAZ */
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    z-index: 9999; padding: 10px 0;
}

.nav-container {
    max-width: 1200px; margin: 0 auto; padding: 0 20px;
    display: flex; justify-content: space-between; align-items: center;
}

/* LOGO */
.logo-area { display: flex; align-items: center; gap: 10px; }
.nav-logo-img { height: 45px; width: auto; }
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-size: 20px; font-weight: 800; color: var(--dark); letter-spacing: -0.5px; }
.brand-sub { font-size: 10px; font-weight: 600; color: var(--primary); letter-spacing: 0.5px; text-transform: uppercase; }

/* MASAÜSTÜ MENÜ */
.nav-menu { display: flex; align-items: center; gap: 30px; }
.nav-link { color: var(--dark); font-weight: 500; font-size: 14px; transition: 0.3s; display: flex; align-items: center; gap: 6px; }
.nav-link i { font-size: 14px; color: var(--primary); opacity: 0.8; }
.nav-link:hover { color: var(--primary); }

.btn-login {
    background: var(--primary); color: #fff; padding: 10px 24px;
    border-radius: 8px; font-weight: 600; font-size: 13px; letter-spacing: 0.5px;
    transition: 0.3s; display: flex; align-items: center; gap: 8px; box-shadow: 0 4px 12px rgba(46, 125, 50, 0.3);
}
.btn-login:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* --- MOBİL MENÜ BUTONU (YENİLENMİŞ) --- */
.menu-toggle {
    display: none; /* Masaüstünde gizli */
    font-size: 28px; /* Büyük ikon */
    color: #000000; /* SİMSİYAH */
    cursor: pointer;
    z-index: 10002;
    padding: 5px; /* Tıklama alanı genişlesin */
}

/* --- HERO SECTION --- */
.hero {
    margin-top: 70px; position: relative;
    background: url('img/t4.png') center center/cover no-repeat;
    height: 85vh; display: flex; align-items: center; justify-content: center;
    color: var(--white); text-align: center;
}
.hero-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(to bottom, rgba(0,0,0,0.2), rgba(0,0,0,0.8)); }
.hero-content { position: relative; z-index: 2; padding: 0 20px; max-width: 800px; }
.hero-tag { background: var(--accent); padding: 5px 15px; border-radius: 20px; font-size: 11px; font-weight: 700; margin-bottom: 20px; display: inline-block; letter-spacing: 1px; color: #fff; }
.hero h1 { font-size: 3rem; font-weight: 800; line-height: 1.2; margin-bottom: 20px; text-shadow: 0 2px 10px rgba(0,0,0,0.5); }
.hero p { font-size: 1.1rem; margin-bottom: 30px; opacity: 0.95; }
.hero-btns { display: flex; gap: 15px; justify-content: center; }
.btn-primary { background: var(--primary); color: var(--white); padding: 15px 35px; border-radius: 50px; font-weight: 700; }
.btn-white-outline { background: transparent; color: var(--white); border: 2px solid var(--white); padding: 15px 35px; border-radius: 50px; font-weight: 700; }
.scroll-down { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); color: var(--white); font-size: 24px; animation: bounce 2s infinite; z-index: 2; }

/* --- ÜRÜN BÖLÜMÜ (SHOWCASE) --- */
.section-padding { padding: 100px 0; }
.bg-white { background: var(--white); }
.product-showcase { display: flex; align-items: center; gap: 50px; justify-content: space-between; }

/* Resim */
.showcase-image { width: 50%; position: relative; display: flex; justify-content: center; }
.main-product-img { width: 100%; max-width: 550px; position: relative; z-index: 2; filter: drop-shadow(0 30px 60px rgba(0,0,0,0.2)); }
.image-bg-circle { position: absolute; width: 450px; height: 450px; background: #e8f5e9; border-radius: 50%; top: 50%; left: 50%; transform: translate(-50%, -50%); z-index: 1; opacity: 0.6; }

/* Bilgi */
.showcase-info { width: 50%; text-align: left; }
.badge-pill { background: #e0f2f1; color: var(--primary); font-size: 11px; font-weight: 700; padding: 6px 12px; border-radius: 20px; letter-spacing: 1px; display: inline-block; margin-bottom: 15px; }
.showcase-title { font-size: 2.8rem; font-weight: 800; line-height: 1.1; margin-bottom: 20px; color: var(--dark); }
.showcase-desc { font-size: 1.05rem; color: #555; margin-bottom: 40px; line-height: 1.7; }

/* Özellik Gridleri (2x2 veya 1x1) */
.features-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.f-item { background: #f8fafc; padding: 20px; border-radius: 16px; display: flex; align-items: center; gap: 15px; border: 1px solid #f1f5f9; transition: 0.3s; }
.f-item:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.05); border-color: #e2e8f0; }
.f-item i { font-size: 22px; color: var(--primary); background: #fff; width: 45px; height: 45px; display: flex; align-items: center; justify-content: center; border-radius: 10px; box-shadow: 0 4px 10px rgba(0,0,0,0.05); flex-shrink: 0; }
.f-item h4 { font-size: 14px; font-weight: 700; color: var(--dark); margin-bottom: 2px; }
.f-item span { font-size: 12px; color: #64748b; line-height: 1.2; display: block; }
.full-width { grid-column: span 2; } /* Güneş enerjisi kartı geniş olsun */

/* --- SAHA & PARALLAX --- */
.parallax-section { position: relative; background: url('img/t5.png') center center/cover fixed no-repeat; padding: 120px 0; color: var(--white); background-attachment: scroll; }
@media (min-width: 992px) { .parallax-section { background-attachment: fixed; } }
.parallax-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.65); z-index: 1; }
.relative { position: relative; z-index: 10; }
.max-w-600 { max-width: 600px; margin: 0 auto; }

/* İstatistikler */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 50px; }
.stat-box { background: rgba(255,255,255,0.1); backdrop-filter: blur(5px); padding: 30px; border-radius: 15px; border: 1px solid rgba(255,255,255,0.2); }
.stat-box i { font-size: 32px; color: var(--accent); margin-bottom: 15px; }
.stat-box h3 { font-size: 2.5rem; font-weight: 800; margin-bottom: 5px; }

/* --- NEDEN BİZ --- */
.bg-light { background: #F8FAFC; }
.section-title { font-size: 2.5rem; font-weight: 700; margin-bottom: 10px; color: var(--dark); }
.section-desc { color: #64748b; max-width: 600px; margin: 0 auto 40px; font-size: 1.1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.feature-card { background: #fff; padding: 40px 30px; border-radius: 20px; text-align: center; box-shadow: var(--shadow); transition: 0.3s; border-bottom: 4px solid transparent; }
.feature-card:hover { transform: translateY(-10px); border-bottom-color: var(--primary); }
.icon-circle { width: 70px; height: 70px; margin: 0 auto 20px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 28px; }
.c-green { background: #e8f5e9; color: var(--primary); } .c-blue { background: #e3f2fd; color: #1565C0; } .c-orange { background: #fff3e0; color: #E65100; }

/* --- FOOTER --- */
.footer { background: var(--dark); color: #94a3b8; padding: 80px 0 40px; }
.footer-btns { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; margin-bottom: 40px; }
.btn-footer { display: inline-flex; align-items: center; gap: 10px; padding: 14px 30px; border-radius: 50px; font-weight: 600; font-size: 14px; transition: 0.3s; }
.btn-panel { background: #fff; color: var(--dark); } .btn-panel:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0,0,0,0.2); }
.btn-guide { border: 1px solid rgba(255,255,255,0.2); color: #fff; } .btn-guide:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.footer-logo { height: 40px; margin: 0 auto 15px; opacity: 0.8; filter: brightness(0) invert(1); }

/* --- MOBİL UYUMLULUK VE ÖZEL TASARIM --- */
@media (max-width: 992px) {
    /* Navbar ve Menü */
    .menu-toggle { display: block; }
    
    .nav-menu {
        position: absolute; top: 100%; left: 0; width: 100%;
        background: #fff; flex-direction: column; align-items: stretch;
        padding: 20px; gap: 10px; box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        border-bottom-left-radius: 20px; border-bottom-right-radius: 20px;
        opacity: 0; visibility: hidden; transform: translateY(-20px); transition: 0.3s;
    }
    .nav-menu.active { opacity: 1; visibility: visible; transform: translateY(0); }
    .nav-link { background: #F8FAFC; padding: 15px; border-radius: 12px; font-size: 16px; border: 1px solid #E2E8F0; }
    .nav-link:active { background: #E2E8F0; }
    .btn-login { width: 100%; justify-content: center; padding: 15px; border-radius: 12px; margin-top: 10px; font-size: 15px; }

    /* Hero */
    .hero { margin-top: 75px; height: auto; padding: 100px 0 60px; }
    .hero h1 { font-size: 2.2rem; }
    .desktop-only { display: none !important; } /* Giriş yap butonu gizlenir */
    .hero-btns { flex-direction: column; width: 100%; }
    .btn-primary { width: 100%; text-align: center; display: block; }

    /* Ürün Bölümü */
    .product-showcase { flex-direction: column; gap: 40px; text-align: center; }
    .showcase-image, .showcase-info { width: 100%; }
    .main-product-img { max-width: 120%; margin-left: -10%; /* Mobilde resmi taşırarak büyüt */ }
    .image-bg-circle { width: 280px; height: 280px; }
    
    .showcase-title { font-size: 2rem; }
    .showcase-desc { padding: 0 10px; }
    .features-grid { grid-template-columns: 1fr; text-align: left; }
    .full-width { grid-column: span 1; }

    /* İstatistikler */
    .stats-grid { grid-template-columns: 1fr; gap: 15px; }
    
    /* "Neden Biz" Kartları */
    .section-padding { padding: 60px 0; }
    .grid-3 { gap: 20px; }
    
    /* Footer */
    .footer-btns { flex-direction: column; }
    .btn-footer { width: 100%; justify-content: center; }
}

/* Animasyonlar */
.floating-anim { animation: float 4s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-15px); } }
.fade-in { opacity: 0; transform: translateY(20px); animation: fadeInUp 1s forwards; }
.reveal, .reveal-left, .reveal-right { opacity: 0; transition: 1s; }
.reveal { transform: translateY(30px); } .reveal-left { transform: translateX(-30px); } .reveal-right { transform: translateX(30px); }
.reveal.active, .reveal-left.active, .reveal-right.active { opacity: 1; transform: translate(0); }
.delay-1 { animation-delay: 0.2s; transition-delay: 0.2s; } .delay-2 { animation-delay: 0.4s; transition-delay: 0.4s; } .delay-3 { animation-delay: 0.6s; transition-delay: 0.6s; }
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }