/* --- PROFESYONEL HEADER YAPISI --- */
.main-header {
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* Üst Bar */
.top-bar {
    background: var(--secondary); /* Lacivert Kurumsal Arka Plan */
    color: #cbd5e1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 5%;
    font-size: 13px;
}

.top-bar a {
    color: #cbd5e1;
    text-decoration: none;
    margin-left: 20px;
    transition: color 0.2s;
}

.top-bar a:hover {
    color: #ffffff;
}

.top-bar-right .user-link {
    font-weight: 600;
    color: #fff;
}

.top-bar-right .logout-link {
    color: #fca5a5;
}

/* Ana Navigasyon */
.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    background: #ffffff;
}

.nav-bar .logo a {
    font-size: 26px;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.main-menu {
    display: flex;
    align-items: center;
}

.main-menu a {
    color: var(--text);
    text-decoration: none;
    margin-left: 30px;
    font-weight: 600;
    font-size: 15px;
    padding-bottom: 5px;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.main-menu a:hover {
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
}

.main-menu .highlight-link {
    color: var(--accent);
}
.main-menu .highlight-link:hover {
    border-bottom: 2px solid var(--accent);
}