:root {
    --bg-base: #030303;
    --bg-surface: #0a0a0a;
    --bg-card: #111111;
    --gold-primary: #D4AF37;
    --gold-dim: rgba(212, 175, 55, 0.2);
    --text-main: #FFFFFF;
    --text-muted: #A0A0A0;
    --border-color: #1A1A1A;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body { 
    background: var(--bg-base); 
    color: var(--text-main); 
    font-family: 'Inter', sans-serif; 
    overflow-x: hidden; 
    line-height: 1.6; 
}

h1, h2, h3, h4 { 
    font-family: 'Oswald', sans-serif; 
    letter-spacing: 2px; 
    text-transform: uppercase;
}

a { text-decoration: none; color: inherit; }

/* BUTONLAR VE TİPOGRAFİ */
.btn-primary { 
    display: inline-block; 
    background: var(--gold-primary); 
    color: #000; 
    padding: 15px 35px; 
    font-weight: 700; 
    font-family: 'Oswald', sans-serif; 
    letter-spacing: 2px; 
    text-transform: uppercase; 
    cursor: pointer; 
    transition: 0.3s; 
    border: 1px solid var(--gold-primary); 
}
.btn-primary:hover { 
    background: transparent; 
    color: var(--gold-primary); 
    box-shadow: 0 0 20px var(--gold-dim); 
}

.btn-outline { 
    border: 1px solid var(--gold-primary); 
    color: var(--gold-primary); 
    padding: 8px 20px; 
    text-transform: uppercase; 
    font-size: 0.7rem; 
    letter-spacing: 2px; 
    transition: 0.3s; 
}
.btn-outline:hover { 
    background: var(--gold-primary); 
    color: #000; 
}

.division-tag { 
    font-family: 'Oswald', sans-serif; 
    color: var(--gold-primary); 
    font-size: 0.8rem; 
    font-weight: 700; 
    text-transform: uppercase; 
    border-left: 2px solid var(--gold-primary); 
    padding-left: 10px; 
    margin-bottom: 20px; 
    display: block; 
}

.card-id { 
    font-size: 0.7rem; 
    color: var(--gold-primary); 
    font-family: 'monospace'; 
    margin-bottom: 10px; 
    letter-spacing: 1px; 
}

/* DİL SEÇİCİ */
#langSwitch { 
    background: transparent; 
    color: var(--gold-primary); 
    border: 1px solid var(--gold-primary); 
    padding: 5px 10px; 
    font-family: 'Oswald', sans-serif; 
    font-weight: bold; 
    cursor: pointer; 
    outline: none; 
    transition: 0.3s; 
    text-transform: uppercase; 
    font-size: 0.8rem; 
}
#langSwitch option { 
    background: var(--bg-base); 
    color: var(--gold-primary); 
    font-family: 'Inter', sans-serif; 
}
#langSwitch:hover { 
    background: var(--gold-primary); 
    color: #000; 
}

/* ANİMASYONLAR VE NAVBAR */
.reveal { opacity: 0; transform: translateY(40px); transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
.reveal.active { opacity: 1; transform: translateY(0); }

nav { position: fixed; top: 0; width: 100%; padding: 25px 50px; display: flex; justify-content: space-between; align-items: center; z-index: 1000; transition: 0.4s; }
nav.scrolled { background: rgba(3,3,3,0.95); padding: 15px 50px; border-bottom: 1px solid var(--border-color); backdrop-filter: blur(10px); }
.logo { font-size: 1.5rem; font-weight: 800; color: #fff; letter-spacing: 3px; font-family: 'Oswald', sans-serif; }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 2px; position: relative; transition: 0.3s; font-weight: 600; font-family: 'Inter', sans-serif;}
.nav-links a:hover { color: var(--gold-primary); }

.menu-toggle { display: none; cursor: pointer; flex-direction: column; gap: 5px; }
.menu-toggle .bar { width: 25px; height: 3px; background-color: var(--gold-primary); transition: 0.3s; }

/* GİRİŞ EKRANI (KURUMSAL AĞIRLIK) */
#home { height: 100vh; display: flex; justify-content: center; align-items: center; position: relative; border-bottom: 1px solid var(--border-color); background: radial-gradient(circle at center, #111 0%, #000 100%); }
.hero-content { text-align: center; z-index: 2; padding: 0 20px; max-width: 900px; }
.hero-title { font-size: 5rem; line-height: 1.1; text-transform: uppercase; letter-spacing: -2px; margin-bottom: 20px; color: #fff; }
.hero-subtitle { color: var(--text-muted); font-size: 1.1rem; letter-spacing: 2px; margin-bottom: 40px; font-weight: 300; }
.hero-buttons { display: flex; gap: 20px; justify-content: center; }

/* BÖLÜMLER */
.feature-row { display: flex; align-items: center; justify-content: space-between; gap: 60px; padding: 120px 10%; border-bottom: 1px solid var(--border-color); }
.feature-text { flex: 1; }
.feature-text h2 { color: #fff; font-size: 2.5rem; margin-bottom: 20px; }
.feature-text p { color: var(--text-muted); font-size: 1.1rem; }

.feature-visual { flex: 1; min-height: 350px; background: #050505; border: 1px solid var(--border-color); display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; box-shadow: inset 0 0 50px rgba(0,0,0,0.8); }
.code-stream { color: var(--gold-primary); font-family: 'monospace'; font-size: 0.9rem; opacity: 0.7; letter-spacing: 2px; text-shadow: 0 0 10px var(--gold-dim); }

/* EKOSİSTEM IZGARASI */
.features-grid { padding: 120px 10%; background: var(--bg-base); border-bottom: 1px solid var(--border-color); }
.grid-header { text-align: center; margin-bottom: 60px; }
.grid-header h2 { color: #fff; font-size: 2.5rem; margin-bottom: 10px; }
.grid-header p { color: var(--text-muted); text-transform: uppercase; letter-spacing: 2px; font-size: 0.85rem; font-family: 'Inter', sans-serif;}

.grid-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.grid-card { background: var(--bg-surface); padding: 40px 30px; border: 1px solid var(--border-color); transition: 0.4s; cursor: pointer; }
.grid-card:hover { background: var(--bg-card); border-color: var(--gold-dim); transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,0,0,0.5); }
.grid-card h3 { margin-bottom: 15px; font-size: 1.3rem; color: #fff; }
.grid-card p { color: var(--text-muted); font-size: 0.95rem; }

/* İLETİŞİM VE FOOTER */
.final-cta { text-align: center; padding: 120px 20px; background: #000; }
.final-cta h2 { font-size: 3rem; margin-bottom: 20px; color: #fff; }
.final-cta p { color: var(--text-muted); margin-bottom: 50px; font-size: 1rem; text-transform: uppercase; letter-spacing: 2px; }

.official-mail { 
    color: var(--gold-primary); 
    font-size: 1.8rem; 
    font-family: 'Oswald', sans-serif; 
    font-weight: bold; 
    letter-spacing: 2px; 
    transition: 0.3s; 
    display: inline-block;
}
.official-mail:hover { text-shadow: 0 0 15px var(--gold-dim); }

.social-proof { display: flex; gap: 20px; justify-content: center; margin-top: 20px; font-family: 'monospace'; font-size: 0.9rem; }
.social-proof a { color: #fff; border: 1px solid #333; padding: 8px 20px; text-transform: uppercase; transition: 0.3s; }
.social-proof a:hover { border-color: var(--gold-primary); color: var(--gold-primary); }

.contact-form { max-width: 500px; margin: 0 auto; display: flex; flex-direction: column; gap: 20px; }
.contact-form input, .contact-form textarea { 
    width: 100%; 
    padding: 18px 20px; 
    background: var(--bg-surface); 
    border: 1px solid var(--border-color); 
    color: var(--text-main); 
    font-family: 'Inter', sans-serif; 
    transition: 0.3s; 
}
.contact-form textarea { resize: vertical; min-height: 120px; }
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--gold-primary); background: var(--bg-card); }

footer { text-align: center; padding: 30px; background: #000; border-top: 1px solid var(--border-color); color: var(--text-muted); font-size: 0.75rem; letter-spacing: 3px; font-family: 'Inter', sans-serif; text-transform: uppercase;}

#custom-alert { position: fixed; bottom: -50px; right: 20px; background: var(--gold-primary); color: #000; padding: 15px 30px; font-weight: 700; font-family: 'monospace'; opacity: 0; transition: 0.4s ease; z-index: 9999; }
#custom-alert.show { bottom: 30px; opacity: 1; }

/* MOBİL TASARIM */
@media (max-width: 900px) {
    .hero-title { font-size: 3rem; }
    .feature-row { flex-direction: column; text-align: center; padding: 80px 5%; }
    .feature-visual { width: 100%; min-height: 250px; }
    nav { padding: 20px; }
    .menu-toggle { display: flex; }
    .nav-links { position: absolute; top: 70px; right: 0; width: 100%; background: #030303; flex-direction: column; padding: 20px 0; transform: translateY(-150%); opacity: 0; transition: 0.4s ease; border-bottom: 1px solid var(--border-color); }
    .nav-links.active { transform: translateY(0); opacity: 1; }
}