@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

/* --- MODERN DEĞİŞKENLER (Renk Paleti) --- */
:root {
    /* Koyu Modern Arkaplan (Mavi Tonlu) */
    --bg-gradient: linear-gradient(135deg, #1e3a8a 0%, #0f172a 100%); 
    
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    
    --color-primary: #3b82f6; /* Parlak Mavi */
    --color-accent: #facc15;  /* Altın Sarısı */
    --color-success: #10b981; /* Yeşil */
    --color-danger: #ef4444;  /* Kırmızı */
    
    --text-main: #ffffff;
    --text-muted: #94a3b8;
    
    --nav-height: 80px;
    --radius-md: 16px;
    --radius-sm: 8px;
    
    --font-main: 'Poppins', sans-serif;
}

/* --- TEMEL AYARLAR --- */
* { box-sizing: border-box; outline: none; }

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-main);
    background: var(--bg-gradient);
    background-attachment: fixed; /* Arkaplan sabit kalır */
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-size: 15px;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; padding: 0; margin: 0; }
img { max-width: 100%; display: block; }

/* --- SABİT HEADER (NAVBAR) --- */
.main-header {
    position: sticky; /* Sayfa kaydırılsa bile üstte kalır */
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(30, 58, 138, 0.85); /* Koyu Mavi Yarı Saydam */
    backdrop-filter: blur(12px);
    border-bottom: var(--glass-border);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    height: var(--nav-height);
    display: flex;
    align-items: center;
}

.navbar-inner {
    width: 100%;
    max-width: 1250px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.logo-brand i { color: var(--text-main); font-size: 1.2em; }

/* Menü Linkleri (Desktop) */
.nav-menu { display: flex; align-items: center; gap: 5px; }

.nav-item { position: relative; }

.nav-link {
    padding: 10px 15px;
    font-weight: 500;
    font-size: 0.95em;
    color: rgba(255,255,255,0.8);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--color-accent);
    background: rgba(255,255,255,0.1);
}

/* "İlan Ver" Butonu Özel */
.btn-highlight {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255,255,255,0.2);
}
.btn-highlight:hover {
    background: var(--text-main);
    color: #1e3a8a; /* Mavi yazı */
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.4);
}

/* Mobil Menü Butonu */
.mobile-toggle { display: none; font-size: 1.5rem; cursor: pointer; color: var(--text-main); }

/* Bildirim Rozeti */
.badge-count {
    position: absolute;
    top: 5px;
    right: 5px;
    background: var(--color-accent);
    color: #000;
    font-size: 0.65rem;
    font-weight: bold;
    padding: 2px 5px;
    border-radius: 50%;
    min-width: 16px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

/* --- GENEL CONTAINER --- */
.container {
    width: 100%;
    max-width: 1250px;
    margin: 30px auto;
    padding: 0 20px;
    flex: 1;
}

/* --- KART YAPILARI (GLASS) --- */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: var(--glass-border);
    border-radius: var(--radius-md);
    padding: 30px;
    box-shadow: var(--glass-shadow);
    margin-bottom: 25px;
}

/* --- BUTONLAR --- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600; cursor: pointer; border: none;
    font-size: 1em; transition: 0.3s;
    text-align: center; color: white;
}
.btn-primary { background: var(--color-primary); box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4); }
.btn-primary:hover { background: #2563eb; transform: translateY(-2px); }

.btn-success { background: var(--color-success); box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4); }
.btn-success:hover { background: #059669; transform: translateY(-2px); }

.btn-danger { background: var(--color-danger); }
.btn-danger:hover { background: #dc2626; transform: translateY(-2px); }

.btn-full { width: 100%; }

/* --- FORM ELEMANLARI --- */
input, select, textarea {
    width: 100%;
    padding: 14px;
    background: rgba(0,0,0,0.2);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-sm);
    color: white;
    font-family: inherit;
    font-size: 0.95em;
    transition: 0.3s;
}
input:focus, select:focus, textarea:focus {
    background: rgba(0,0,0,0.4);
    border-color: var(--color-accent);
    box-shadow: 0 0 10px rgba(250, 204, 21, 0.2);
}
select option { background: #1e3a8a; color: white; }

/* --- FOOTER --- */
.site-footer {
    background: rgba(15, 23, 42, 0.9);
    border-top: var(--glass-border);
    padding: 30px 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9em;
    margin-top: auto;
}

/* --- ALERT KUTULARI --- */
.alert { padding: 15px; border-radius: var(--radius-sm); margin-bottom: 20px; text-align: center; }
.alert.success { background: rgba(16, 185, 129, 0.15); color: var(--color-success); border: 1px solid var(--color-success); }
.alert.error { background: rgba(239, 68, 68, 0.15); color: var(--color-danger); border: 1px solid var(--color-danger); }

/* --- TAM MOBİL UYUM (RESPONSIVE) --- */
@media (max-width: 992px) {
    /* Menü Mobilde Yan Tarafa Geçer */
    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        right: -100%; /* Başlangıçta gizli */
        width: 75%;
        height: calc(100vh - var(--nav-height));
        background: rgba(15, 23, 42, 0.98); /* Çok koyu arka plan */
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        transition: 0.4s ease;
        border-left: var(--glass-border);
        box-shadow: -10px 0 30px rgba(0,0,0,0.5);
        overflow-y: auto;
    }
    .nav-menu.active { right: 0; } /* Açıldığında görünür */
    
    .nav-link { 
        width: 100%; 
        padding: 15px; 
        font-size: 1.1em; 
        border-bottom: 1px solid rgba(255,255,255,0.05); 
    }
    
    .mobile-toggle { display: block; }
    
    .container { padding: 15px; margin: 15px auto; }
    .card { padding: 20px; }
}