/* =========================================
   1. DEĞİŞKENLER VE TEMEL SIFIRLAMA
   ========================================= */
:root {
    --primary-color: #030712;
    --primary-light: #111827;
    --accent-color: #6366f1;
    --accent-hover: #4f46e5;
    --bg-light: #f8fafc;
    --text-muted: #64748b;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --transition-speed: 0.4s;
    --glow-accent: rgba(99, 102, 241, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--primary-color);
    line-height: 1.6;
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, 
svg {
    display: inline-block;
    vertical-align: middle;
    max-width: 100%;
    height: auto;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

a:focus-visible, 
button:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.text-accent {
    color: var(--accent-color);
}

/* =========================================
   2. GLOBAL YERLEŞİM (LAYOUT)
   ========================================= */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header & Navigasyon */
.site-header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    height: 72px;
}

.brand-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.main-nav {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.95rem;
}

.nav-link:hover {
    color: var(--primary-color);
}

/* Footer */
.site-footer {
    text-align: center;
    padding: 40px 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: 60px;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-copy {
    margin: 0;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 24px;
}

/* =========================================
   3. UI BİLEŞENLERİ
   ========================================= */
/* Butonlar */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-speed) cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    text-align: center;
}

.btn-sm {
    padding: 10px 24px;
    font-size: 0.9rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white) !important;
    box-shadow: 0 4px 6px rgba(15, 23, 42, 0.1);
}

.btn-primary:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(15, 23, 42, 0.2);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color) !important;
    border-color: var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-light);
    transform: translateY(-2px);
}

.btn-accent {
    background-color: var(--accent-color);
    color: var(--white) !important;
    box-shadow: 0 4px 6px rgba(99, 102, 241, 0.2);
}

.btn-accent:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.3);
}

/* Uyarı Mesajları (Alerts) */
.alert, .global-alert {
    padding: 16px 24px;
    margin: 24px auto;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    max-width: 800px;
    font-size: 0.95rem;
}

.alert-success {
    background-color: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-error {
    background-color: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* =========================================
   4. MOBİL UYUMLULUK (RESPONSIVE)
   ========================================= */
@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    
    .header-container {
        justify-content: space-between;
    }

    .footer-container {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .footer-links {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    /* Mobilde Butonların Genişlemesi */
    .btn {
        width: 100%;
        padding: 14px 24px;
    }
    
    .btn-outline {
        width: 100%;
    }
}
/* Layout'a Özel Mobil Menü Stilleri */
        .mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; color: var(--primary-color); padding: 5px; }
        .nav-wrapper { display: flex; align-items: center; gap: 32px; }
        .auth-nav { display: flex; align-items: center; gap: 16px; }

        @media (max-width: 768px) {
            .mobile-menu-btn { display: block; }
            .nav-wrapper {
                display: none; /* Mobilde varsayılan olarak kapalı */
                flex-direction: column;
                position: absolute;
                top: 72px; /* Header yüksekliği */
                left: 0;
                right: 0;
                background: var(--white);
                padding: 24px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 15px 25px -5px rgba(0,0,0,0.1);
                gap: 20px;
            }
            /* Menü Açık Sınıfı */
            .nav-wrapper.show { display: flex; }
            
            .main-nav { display: flex; flex-direction: column; gap: 16px; width: 100%; text-align: center; }
            .auth-nav { flex-direction: column; gap: 12px; width: 100%; border-top: 1px solid var(--border-color); padding-top: 20px; }
            
            /* Mobilde butonlar tam genişlik */
            .auth-nav .btn, .auth-nav form, .auth-nav form button { width: 100%; }
        }